WO2023011152A1 - 发现边缘应用服务器的方法及装置 - Google Patents

发现边缘应用服务器的方法及装置 Download PDF

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Publication number
WO2023011152A1
WO2023011152A1 PCT/CN2022/106229 CN2022106229W WO2023011152A1 WO 2023011152 A1 WO2023011152 A1 WO 2023011152A1 CN 2022106229 W CN2022106229 W CN 2022106229W WO 2023011152 A1 WO2023011152 A1 WO 2023011152A1
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WIPO (PCT)
Prior art keywords
information
eas
network element
smf
application server
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PCT/CN2022/106229
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English (en)
French (fr)
Inventor
赵鹏涛
李岩
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CA3228263A priority Critical patent/CA3228263A1/en
Priority to EP22851866.8A priority patent/EP4366346A4/en
Priority to AU2022321592A priority patent/AU2022321592B2/en
Publication of WO2023011152A1 publication Critical patent/WO2023011152A1/zh
Priority to US18/424,897 priority patent/US20240171647A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/50—Service provisioning or reconfiguring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/45—Network directories; Name-to-address mapping
    • H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
    • H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/131—Protocols for games, networked simulations or virtual reality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/51—Discovery or management thereof, e.g. service location protocol [SLP] or web services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/565—Conversion or adaptation of application format or content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes

Definitions

  • the present application relates to the field of communication technologies, and more specifically, relates to a method and device for discovering an edge application server.
  • the discovery of edge application server (edge application server, EAS) in edge computing can be realized through domain name system (domain name system, DNS) technology, specifically Including: introducing an edge application server discovery function (edge application server discovery function, EASDF) network element in edge computing, and the EASDF network element includes at least one of the following functions: receiving a DNS message sent by a session management function (session management function, SMF) network element Processing rules, sending DNS messages to the local DNS server (DNS server) or central DNS server, and adding DNS extension mechanisms for DNS client subnet (extension mechanisms for DNS client subnet, ECS) options for DNS query information.
  • DNS domain name system
  • the DNS server can return the EAS Internet protocol (internet protocol, IP) address that matches the ECS option, but when the SMF determines the information to construct the ECS option sent to EASDF, the EAS corresponding to the determined ECS option may occur
  • the load is too high, or the EAS upgrade server is unable to provide services, etc., which degrades the service quality of EAS.
  • the present application provides a method for discovering edge application servers, which can improve the service quality of EAS.
  • a method for discovering an edge application server may be performed by a network element with a session management function, or may also be performed by a chip, a chip system or a circuit in a network element with a session management function, This application is not limited to this.
  • the following uses the implementation of the session management function by a network element as an example for description.
  • the method includes:
  • the session management function network element obtains the first indication information or the information of at least one edge application server EAS, wherein the session management function network element is a network element that provides services for the session of the terminal device, and the information of the EAS is used to indicate the EAS At least one of the selection weight of the EAS, the load state of the EAS, or the service state of the EAS, the first indication information is used to indicate the EAS that cannot provide services for the terminal device; the session management function network element according to the obtained EAS
  • the information or the first indication information determines the first information, and the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism, or the first information is used to determine the address of the local domain name system DNS server,
  • the information of the ECS option or the address of the local DNS server is used to determine the EAS providing the service for the terminal device.
  • an EAS with better service quality can be selected, thereby improving the service quality of the EAS.
  • the obtaining the information of at least one EAS by the session management function network element includes: the session management function network element receiving the information of the at least one EAS from the application function network element.
  • the information of at least one EAS includes: information of at least one edge computing platform, where the information of the at least one edge computing platform is used to indicate the information of the at least one EAS, where , the at least one EAS is deployed on the at least one edge computing platform.
  • the session management function network element can receive EAS information from the application function network element or the information of the edge computing platform used to determine the EAS information, that is to say, the session management function network element can be based on the information of the edge computing platform
  • the information of the EAS deployed in the edge computing platform is determined indirectly, so as to increase the flexibility of the solution.
  • the method further includes: the session management function network element sending subscription information or request information to the application function network element, where the subscription information or request information is used to obtain the Information on at least one EAS.
  • the application function network element can actively execute the delivery of the above-mentioned at least one EAS information, and can also subscribe or request the delivery of the above-mentioned at least one EAS information based on the session management function network element, providing the application function network element Different trigger modes for sending messages increase the flexibility of the solution.
  • the method further includes: the session management functional network element sending second indication information to the user plane functional network element, where the second indication information is used to indicate that the user plane
  • the functional network element detects the first data packet, and the destination IP address of the first data packet is the IP address of the first EAS; the session management functional network element receives the first reported information from the user plane functional network element, and the first The report information includes the detection result of the first data packet, and the detection result includes the access volume information of the first EAS and/or the first data packet between the user plane functional network element and the first EAS Transmission delay information; wherein, the first EAS is any one of the at least one EAS.
  • the obtaining the information of at least one EAS by the session management function network element includes: the session management function network element determining the information of the first EAS according to the first reported information ; Or, the session management function network element sends the first report information to the network data analysis function network element, and the first report information is used to determine the information of the first EAS; the session management function network element receives from the network data Analyze the information of the first EAS of the functional network element.
  • the session management function network element can directly determine the EAS information according to the data packet detection result reported by the user plane function network element, and can also send the data packet detection result reported by the user plane function network element to the network data analysis function network
  • the network element with the network data analysis function performs data analysis to obtain the EAS information and then sends it to the session management function network element, which provides different ways to determine the EAS information and increases the flexibility of the solution.
  • the method further includes: the session management functional network element sending third indication information to the user plane functional network element, where the third indication information is used to indicate that the user plane The functional network element determines the state of the first EAS; the session management functional network element receives second report information from the user plane functional network element, and the second report information includes indication information of the state of the first EAS, wherein the The first EAS is any one of the at least one EAS.
  • the obtaining the information of at least one EAS by the session management function network element includes: the session management function network element determining the information of the first EAS according to the second reported information or, the session management function network element sends the second report information to the network data analysis function network element, and the second report information is used to determine the information of the first EAS; the session management function network element receives the information from the network data analysis Information about the first EAS of the functional network element.
  • the session management function network element can directly determine the EAS information according to the network detection result reported by the user plane function network element, and can also send the network detection result reported by the user plane function network element to the network data analysis function network element,
  • the network element with the network data analysis function performs data analysis to obtain the EAS information and then sends it to the network element with the session management function, which provides different ways to determine the information of the EAS and increases the flexibility of the solution.
  • the method further includes: the session management functional network element sending fourth indication information to the user plane functional network element, where the fourth indication information is used to indicate that the UPF cache DNS query information for the first fully qualified domain name FQDN from the terminal device; the session management functional network element receives third reported information from the user plane functional network element, and the third reported information includes the first FQDN; the The session management function network element obtaining the first indication information includes: the session management function network element determining the first indication information according to the third reported information, wherein the first indication information indicates that the second EAS that cannot provide services for the terminal device .
  • the obtaining the first indication information by the session management function network element includes: the session management function network element receiving the first indication information from the terminal device, the first The indication information is used to indicate the third EAS that cannot provide services for the terminal device.
  • the session management function network element can determine the EAS that cannot provide services for the terminal device according to the information related to the DNS query information reported by the user plane function network element, or can determine that the terminal device cannot provide services for the terminal device according to the information reported by the terminal device.
  • the EAS provides different ways to determine the EAS that cannot provide services for the terminal device, increasing the flexibility of the solution.
  • the method further includes: the session management function network element sending the information for determining the ECS option or the local DNS server address to the edge application server discovery function network element .
  • the session management function network element can send the above-mentioned information on constructing the ECS option or the address of the local DNS server to the edge application server discovery function network element, so as to avoid excessive load on the edge computing platform or EAS corresponding to the determined ECS option , or the EAS upgrade server cannot provide services, etc.
  • a method for discovering an edge application server may be executed by an application function network element, or may also be executed by a chip, a chip system, or a circuit in a network element having an application function.
  • the present application There is no limit to this.
  • the following uses an application function network element as an example for description.
  • the method includes:
  • the application function network element determines at least one edge application server EAS information, wherein the information of the EAS is used to indicate at least one of the selection weight of the EAS, the load of the EAS, or the service status of the EAS; the application function network The element sends the information of the at least one EAS to the session management function network element, the information of the EAS is used to determine the first information, and the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism, or the first The information is used to determine the address of the local domain name system DNS server, and the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • the session management function network element can receive the EAS information from the application function network element, and by considering the relevant information of the EAS, determine the information used to construct the ECS option, or determine the address of the local DNS server to avoid
  • the edge computing platform corresponding to the ECS option or the local DNS server address or the EAS load is too high, or the EAS upgrade server cannot provide services, so as to avoid the degradation of EAS service quality.
  • the information of at least one EAS includes: information of at least one edge computing platform, where the information of the at least one edge computing platform is used to indicate the information of the at least one EAS, wherein , the at least one EAS is deployed on the at least one edge computing platform.
  • the session management function network element can receive EAS information from the application function network element or the information of the edge computing platform used to determine the EAS information, that is to say, the session management function network element can be based on the information of the edge computing platform
  • the information of the EAS deployed in the edge computing platform is determined indirectly, so as to increase the flexibility of the solution.
  • the method further includes: the application function network element receiving subscription information or request information from the session management function network element, where the subscription information or request information is used to obtain Information about the at least one EAS.
  • the application function network element can actively execute the delivery of the above-mentioned at least one EAS information, and can also subscribe or request the delivery of the above-mentioned at least one EAS information based on the session management function network element, providing the application function network element Different trigger modes for sending messages increase the flexibility of the solution.
  • a method for discovering an edge application server may be executed by a network element with a user plane function, or may also be executed by a chip, a chip system or a circuit in a network element with a user plane function, This application is not limited to this.
  • the following uses the implementation by a user plane functional network element as an example for description.
  • the method includes:
  • the user plane functional network element receives second indication information from the session management functional network element, the second indication information is used to instruct the user plane functional network element to detect the first data packet, and the destination Internet protocol IP of the first data packet
  • the address is the IP address of the first edge application server EAS;
  • the user plane functional network element detects the first data packet, and obtains a detection result of the first data packet, and the detection result includes traffic information of the first EAS and/or transmission delay information of the first data packet between the user plane functional network element and the first EAS;
  • the user plane functional network element sends first report information to the session management functional network element, and the first
  • the reporting information includes the detection result of the first data packet, the first reporting information is used to determine the information of the first EAS, the information of the first EAS is used to indicate the load status of the first EAS, and/or use Indicates the service state of the first EAS;
  • the information of the EAS is used to determine the first information, and the first information is used to determine the information of the client subnet
  • the session management function network element can determine the EAS information according to the data packet detection result reported by the user plane function network element, and determine the ECS option used to construct the ECS option by considering the load status of the EAS and the service status of the EAS.
  • Information, or information to determine the address of the local DNS server, to avoid the ECS option or the address of the local DNS server corresponding to the edge computing platform or EAS load is too high, or the EAS upgrade server cannot provide services, so as to avoid the decline in the service quality of EAS.
  • a method for discovering an edge application server may be performed by a network element with a user plane function, or may also be performed by a chip, a chip system, or a circuit in a network element with a user plane function,
  • This application is not limited to this.
  • the following uses the implementation by a user plane functional network element as an example for description.
  • the method includes:
  • the user plane functional network element receives third indication information from the session management functional network element, where the third indication information is used to instruct the user plane functional network element to determine the state of the first edge application server EAS; the user plane functional network element sends the The first EAS sends a detection data packet; the user plane functional network element determines the state of the first EAS according to the response of the first EAS to the detection data packet; the user plane functional network element sends the session management function network element sending second report information, the second report information includes indication information of the state of the first EAS, the second report information is used to determine the information of the first EAS, and the information of the first EAS is used to indicate that the first EAS A load status of the EAS, and/or used to indicate the service status of the first EAS; the information of the EAS is used to determine the first information, and the first information is used for the information of the client subnet ECS option of the domain name system extension mechanism Determination, or the first information is used to determine the address of the local Domain Name System DNS server, and the information of
  • the session management function network element can determine the EAS information according to the network detection result reported by the user plane function network element, and determine the information used to construct the ECS option by considering the load status of the EAS and the service status of the EAS , or determine the information of the local DNS server address, to avoid the ECS option or the edge computing platform corresponding to the local DNS server address or the EAS load is too high, or the EAS upgrade server cannot provide services, so as to avoid the decline in the service quality of EAS.
  • a method for discovering an edge application server is provided, and the method may be executed by a network element with a user plane function, or may also be executed by a chip, a chip system, or a circuit in a network element with a user plane function,
  • This application is not limited to this.
  • the following uses the implementation by a user plane functional network element as an example for description.
  • the method includes:
  • the user plane functional network element receives fourth indication information from the session management functional network element, where the fourth indication information is used to instruct the user plane functional network element to cache DNS query information for the first fully qualified domain name FQDN from the terminal device;
  • the user plane functional network element caches the DNS query information;
  • the user plane functional network element sends third reporting information to the session management functional network element, the third reporting information includes the first FQDN, and the third reporting information is used for Determination of the first indication information, the first indication information indicates the second EAS that cannot provide services for the terminal device;
  • the first indication information is used to determine the first information, and the first information is used for the client subclass of the domain name system extension mechanism
  • the determination of the information of the ECS option, or the first information is used to determine the address of the local domain name system DNS server, and the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • the session management functional network element can determine the EAS information that cannot provide services for the terminal device according to the information reported by the user plane functional network element, by considering the EAS that cannot provide services for the terminal device. Construct the information of the ECS option, or determine the information of the local DNS server address, to prevent the edge computing platform or EAS corresponding to the ECS option or the local DNS server address from being unable to provide services, thereby avoiding the degradation of the service quality of the EAS.
  • a method for discovering an edge application server may be executed by a terminal device, or may also be executed by a chip, a chip system or a circuit in the terminal device, which is not limited in the present application.
  • the execution by a terminal device is taken as an example below for description.
  • the method includes:
  • the terminal device determines first indication information, where the first indication information is used to indicate a third EAS that cannot provide services for the terminal device; the terminal device sends the first indication information to the session management function network element; the first indication information uses To determine the first information, the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism, or the first information is used to determine the address of the local domain name system DNS server, the information of the ECS option or the local The DNS server address is used to determine the EAS serving the terminal device.
  • the session management function network element can determine the EAS information that cannot provide services for the terminal device according to the information reported by the terminal device, by considering the EAS that cannot provide services for the terminal device, determine the EAS information used to construct the ECS option information, or to determine the information of the local DNS server address, to prevent the edge computing platform or EAS corresponding to the ECS option or the local DNS server address from being unable to provide services, thereby avoiding the degradation of the service quality of EAS.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation of the first aspect above, the apparatus including:
  • An obtaining unit configured to obtain first indication information or information of at least one edge application server (EAS), wherein the device is a network element that provides services for sessions of terminal devices, and the information of the EAS is used to indicate the selection weight of the EEAS, the At least one of the load status of the EAS or the service status of the EAS, the first indication information is used to indicate the EAS that cannot provide services for the terminal device;
  • EAS edge application server
  • a processing unit configured to determine first information according to the obtained EAS information or the first indication information, where the first information is used for determining the information of the client subnet ECS option of the domain name system extension mechanism, or the first information is used for The determination of the address of the local Domain Name System DNS server, the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • the obtaining unit is a receiving unit, and obtaining the information of at least one EAS by the obtaining unit includes: the receiving unit receives information of the at least one EAS from an application function network element .
  • the information of the at least one EAS includes: information of at least one edge computing platform, where the information of the at least one edge computing platform is used to indicate the information of the at least one EAS, Wherein, the at least one EAS is deployed on the at least one edge computing platform.
  • the device further includes: a sending unit, configured to send subscription information or request information to the application function network element, where the subscription information or request information is used to obtain the at least Information about an EAS.
  • the apparatus further includes: a sending unit, configured to send second indication information to a user plane function network element, where the second indication information is used to indicate that the user plane function
  • the network element detects the first data packet, the destination IP address of the first data packet is the IP address of the first EAS; the receiving unit is used to receive the first report information from the user plane functional network element, the first report
  • the information includes the detection result of the first data packet, and the detection result includes traffic information of the first EAS and/or the transmission time of the first data packet between the user plane functional network element and the first EAS Extension information; wherein, the first EAS is any one of the at least one EAS.
  • the acquiring unit obtaining information of at least one EAS includes: the processing unit determining the information of the first EAS according to the first reported information; or, the sending unit Sending the first report information to the network element with network data analysis function, where the first report information is used to determine the information of the first EAS; the receiving unit receives the information of the first EAS from the network element with network data analysis function.
  • the device further includes: a sending unit, configured to send third indication information to a user plane function network element, where the third indication information is used to indicate that the user plane function The network element determines the state of the first EAS; the receiving unit is configured to receive second reporting information from the user plane functional network element, the second reporting information includes indication information of the state of the first EAS, wherein the first The EAS is any one of the at least one EAS.
  • the acquiring unit obtaining information of at least one EAS includes: the processing unit determining the information of the first EAS according to the second reported information; or, the sending unit Sending the second report information to the network element with network data analysis function, where the second report information is used to determine the information of the first EAS; the receiving unit receives the information of the first EAS from the network element with network data analysis function.
  • the device further includes: a sending unit, configured to send fourth indication information to the user plane functional network element, where the fourth indication information is used to indicate that the UPF cache comes from DNS query information of the terminal device for the first fully qualified domain name FQDN; a receiving unit, configured to receive third reported information from the user plane functional network element, the third reported information includes the first FQDN; the obtaining unit Being a processing unit, the obtaining unit obtaining first indication information includes: the processing unit determining the first indication information according to the third reported information, wherein the first indication information indicates a second EAS that cannot provide services for the terminal device.
  • the obtaining unit is a receiving unit, and obtaining the first indication information by the obtaining unit includes: the receiving unit receives the first indication information from the terminal device, and the first indication information is received by the receiving unit.
  • the indication information is used to indicate the third EAS that cannot provide service for the terminal device.
  • the device further includes: a sending unit, configured to send the information for determining the ECS option or the local DNS server address to the edge application server discovery function network element.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation of the second aspect above, the apparatus including:
  • a processing unit configured to determine at least one edge application server EAS information or at least one edge computing platform information, wherein the at least one edge computing platform information is used to indicate the at least one EAS information, and the at least one edge computing platform The at least one EAS is deployed, and the information of the EAS is used to indicate at least one of the selection weight of the EAS, the load status of the EAS, or the service status of the EAS;
  • a sending unit configured to send the information of the at least one EAS to the session management function network element, the information of the EAS is used to determine the first information, and the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism , or the first information is used to determine the address of the local domain name system DNS server, and the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • the apparatus further includes: a receiving unit, configured to receive subscription information or request information from the session management function network element, where the subscription information or request information is used to obtain Information about the at least one EAS.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation manner of the third aspect above, the apparatus including:
  • a receiving unit configured to receive second indication information from a session management function network element, where the second indication information is used to instruct the device to detect the first data packet, the destination Internet Protocol IP address of the first data packet is the first The IP address of the edge application server EAS;
  • a processing unit configured to detect the first data packet, and obtain a detection result of the first data packet, the detection result including traffic information of the first EAS and/or the first data packet between the device and the Transmission delay information between the first EASs;
  • a sending unit configured to send first report information to the session management function network element, the first report information includes the detection result of the first data packet, and the first report information is used to determine the information of the first EAS,
  • the information of the first EAS is used to indicate the load status of the first EAS, and/or used to indicate the service status of the first EAS; the information of the EAS is used to determine the first information, and the first information is used in the Domain Name System
  • the client subnet ECS option information of the extended mechanism is determined, or the first information is used to determine the local domain name system DNS server address, and the ECS option information or the local DNS server address is used for the EAS that provides services for the terminal device Sure.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation manner of the fourth aspect above, and the apparatus includes:
  • a receiving unit configured to receive third indication information from a session management function network element, where the third indication information is used to instruct the device to determine the state of the first edge application server EAS;
  • a sending unit configured to send a detection data packet to the first EAS
  • a processing unit configured to determine the state of the first EAS according to the response of the first EAS to the detection data packet
  • the sending unit is configured to send second report information to the session management function network element, the second report information includes indication information of the state of the first EAS, and the second report information is used for information of the first EAS Determining that the information of the first EAS is used to indicate the load status of the first EAS, and/or used to indicate the service status of the first EAS; the information of the EAS is used to determine first information, and the first information is used for Determination of the information of the client subnet ECS option of the domain name system extension mechanism, or the first information is used to determine the address of the local domain name system DNS server, and the information of the ECS option or the address of the local DNS server is used to provide services for the terminal device Determination of EAS.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation of the fifth aspect above, the apparatus including:
  • a receiving unit configured to receive fourth indication information from a session management function network element, where the fourth indication information is used to instruct the device to cache DNS query information for the first fully qualified domain name FQDN from the terminal device;
  • a processing unit configured to cache the DNS query information
  • a sending unit configured to send third reporting information to the session management function network element, the third reporting information includes the first FQDN, the third reporting information is used to determine the first indication information, and the first indication information indicates The second EAS that cannot provide services for the terminal device; the first indication information is used to determine the first information, and the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism, or the first information uses Based on the determination of the address of the local domain name system DNS server, the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • an apparatus for discovering an edge application server including a unit for performing the method described in any possible implementation of the sixth aspect above, and the apparatus includes:
  • a processing unit configured to determine first indication information, where the first indication information is used to indicate a third EAS that cannot provide services for the terminal device;
  • a sending unit configured to send the first indication information to a session management function network element; the first indication information is used to determine first information, and the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism , or the first information is used to determine the address of the local domain name system DNS server, and the information of the ECS option or the address of the local DNS server is used to determine the EAS that provides services for the terminal device.
  • a thirteenth aspect provides a device for discovering an edge application server, the device for discovering an edge application server includes a processor, configured to implement the function of the session management function network element in the method described in the first aspect above.
  • the device for discovering an edge application server may further include a memory, the memory is coupled to the processor, and the processor is configured to implement the function of the session management function network element in the method described in the first aspect above.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory, so as to realize the function of the session management function network element in the method described in the first aspect above.
  • the device for discovering edge application servers may further include a communication interface, which is used for the device for discovering edge application servers to communicate with other devices.
  • the communication interface may be a transceiver, an input/output interface, or a circuit.
  • the device for discovering an edge application server includes: a processor and a communication interface
  • the processor is configured to run a computer program, so that the device for discovering an edge application server implements any one of the methods described in the first aspect above;
  • the processor communicates with the outside through the communication interface.
  • the external may be an object other than the processor, or an object other than the device.
  • the device for discovering an edge application server is a chip or a chip system.
  • the communication interface may be an input/output interface, an interface circuit, an output circuit, an input circuit, pins or related circuits on the chip or the chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • a device for discovering an edge application server includes a processor, configured to implement the function of the application function network element in the method described in the second aspect above.
  • the device for discovering an edge application server may further include a memory, the memory is coupled to the processor, and the processor is configured to implement the function of the application function network element in the method described in the second aspect above.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory, so as to realize the function of the application function network element in the method described in the second aspect above.
  • the device for discovering edge application servers may further include a communication interface, which is used for the device for discovering edge application servers to communicate with other devices.
  • the communication interface may be a transceiver, an input/output interface, or a circuit.
  • the device for discovering an edge application server includes: a processor and a communication interface
  • the processor communicates with the outside through the communication interface
  • the processor is configured to run a computer program, so that the device for discovering an edge application server implements any method described in the second aspect above.
  • the external may be an object other than the processor, or an object other than the device.
  • the device for discovering an edge application server is a chip or a chip system.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • a device for discovering an edge application server includes a processor, configured to implement the user plane function network element in the methods described in the third to fifth aspects above Function.
  • the device for discovering an edge application server may further include a memory, the memory is coupled to the processor, and the processor is configured to implement functions of the user plane function network element in the methods described in the third to fifth aspects above.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory, so as to implement the functions of the user plane functional network element in the methods described in the third to fifth aspects above.
  • the device for discovering edge application servers may further include a communication interface, which is used for the device for discovering edge application servers to communicate with other devices.
  • the communication interface may be a transceiver, an input/output interface, or a circuit.
  • the device for discovering an edge application server includes: a processor and a communication interface
  • the processor communicates with the outside through the communication interface
  • the processor is configured to run a computer program, so that the device for discovering an edge application server implements any one of the methods described in the third to fifth aspects above.
  • the external may be an object other than the processor, or an object other than the device.
  • the device for discovering an edge application server is a chip or a chip system.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • an information transmission device configured to implement the functions of the terminal device in the method described in the sixth aspect.
  • the device for information transmission may further include a memory, the memory is coupled to the processor, and the processor is configured to implement the functions of the terminal device in the method described in the sixth aspect above.
  • the memory is used to store program instructions and data.
  • the memory is coupled with the processor, and the processor can call and execute the program instructions stored in the memory, so as to implement the functions of the terminal device in the method described in the sixth aspect above.
  • the device for information transmission may further include a communication interface, which is used for the device for information transmission to communicate with other devices.
  • the communication interface may be a transceiver, an input/output interface, or a circuit.
  • the device for information transmission includes: a processor and a communication interface
  • the processor communicates with the outside through the communication interface
  • the processor is configured to run a computer program, so that the apparatus for information transmission implements any method described in the sixth aspect above.
  • the external may be an object other than the processor, or an object other than the device.
  • the device for information transmission is a chip or a chip system.
  • the communication interface may be an input/output interface, interface circuit, output circuit, input circuit, pin or related circuit on the chip or chip system.
  • the processor may also be embodied as a processing circuit or logic circuit.
  • the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, it causes the computer to execute the methods described in the above aspects.
  • the present application provides a computer program product including instructions, which, when run on a computer, cause the computer to execute the methods described in the above aspects.
  • a communication system including the device for discovering edge application servers shown in the seventh aspect and the device for discovering edge application servers shown in any one or more of the eighth to the twelfth aspects.
  • Devices for edge application servers including the device for discovering edge application servers shown in the seventh aspect and the device for discovering edge application servers shown in any one or more of the eighth to the twelfth aspects.
  • a chip device including a processing circuit, the processing circuit is used to call and run a program from the memory, so that the communication device installed with the chip device executes any one of the above-mentioned first to sixth aspects Methods in Possible Implementations.
  • Fig. 2 is a schematic flowchart of a method for discovering EAS.
  • Fig. 3 is a schematic diagram of an edge computing scenario.
  • Fig. 4 is a schematic flowchart of a DNS query.
  • Fig. 5 is a schematic flowchart of a method for discovering an edge application server provided by an embodiment of the present application.
  • Fig. 6 is a schematic flowchart of a method for discovering an edge application server.
  • Fig. 7 is a schematic flowchart of another method for discovering an edge application server.
  • Fig. 8 is a schematic flowchart of another method for discovering an edge application server.
  • Fig. 9 is a schematic flowchart of another method for discovering an edge application server.
  • Fig. 10 is a schematic flowchart of another method for discovering an edge application server.
  • Fig. 11 is a schematic block diagram of a device provided by an embodiment of the present application.
  • Fig. 12 is another schematic block diagram of the device provided by the embodiment of the present application.
  • Fig. 13 is a schematic structural diagram of a device provided by an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, for example: a fifth generation (5th generation, 5G) system or a new radio (new radio, NR) or long term evolution (long term evolution, LTE) system, etc.
  • the technical solution provided by this application can also be applied to future communication systems, such as the sixth generation mobile communication system.
  • the technical solution of the embodiment of the present application can also be applied to device to device (device to device, D2D) communication, vehicle-to-everything (V2X) communication, machine to machine (machine to machine, M2M) communication, machine Type communication (machine type communication, MTC), and Internet of things (internet of things, IoT) communication system or other communication systems.
  • D2D device to device
  • V2X vehicle-to-everything
  • M2M machine to machine
  • MTC machine Type communication
  • IoT Internet of things
  • FIG. 1 a communication system applicable to the embodiment of the present application is briefly introduced first with reference to FIG. 1 .
  • FIG. 1 shows a schematic architecture diagram of a 5G system 100a to which the embodiment of the present application is applicable.
  • the network architecture may include but not limited to the following network elements (or called functional network elements, functional entities, nodes, devices, etc.):
  • User equipment user equipment, UE
  • wireless access network equipment
  • R radio access network
  • UPF user plane function
  • edge application server edge application server
  • EAS access and mobility management function
  • AMF network exposure function
  • SMF session management function
  • NEF network exposure function
  • NEF network exposure function
  • EASDF network exposure function
  • NRF Network storage function
  • policy control function policy control function
  • PCF policy control function
  • application function application function, AF
  • UDM unified data management
  • User equipment can be called terminal equipment, terminal device, access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
  • a terminal device may be a device that provides voice/data connectivity to users, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • examples of some terminals can be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function (such as notebook computer, palmtop computer, etc.), mobile internet device (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self driving (self driving), wireless in remote medical (remote medical) Terminals, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless Telephones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or connected Other processing devices to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the 5G network or terminal devices in the future evolution of the public land mobile network (PLMN), etc.
  • PLMN public land mobile network
  • the terminal device may also be a terminal device in an Internet of Things (Internet of things, IoT) system.
  • IoT Internet of things
  • Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and object interconnection.
  • IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.
  • NB narrow band
  • terminal equipment can also include smart printers, train detectors, etc., and its main functions include collecting data (part of terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment.
  • the user equipment may be any equipment that can access the network.
  • a certain air interface technology may be used to communicate with each other between the terminal device and the access network device.
  • the user equipment can be used as a base station.
  • a user equipment may act as a scheduling entity, which provides sidelink signals between user equipments in V2X or D2D, etc.
  • a cell phone and an automobile communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
  • (Wireless) access network equipment used to provide network access functions for authorized user equipment in a specific area, and can use transmission tunnels with different service qualities according to the level of user equipment and business requirements.
  • (R)AN can manage wireless resources, provide access services for user equipment, and then complete the forwarding of control signals and user equipment data between user equipment and the core network.
  • (R)AN can also be understood as a base station in a traditional network.
  • the access network device in the embodiment of the present application may be any communication device with a wireless transceiver function for communicating with the user equipment.
  • the access network equipment includes but is not limited to evolved Node B (evolved Node B, eNB) or 5G, such as NR, gNB in the system, or transmission point (TRP or TP), one of the base stations in the 5G system Or a group (including multiple antenna panels) of antenna panels, or it may also be a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (distributed unit, DU).
  • eNB evolved Node B
  • 5G such as NR, gNB in the system, or transmission point (TRP or TP)
  • TRP or TP transmission point
  • BBU baseband unit
  • DU distributed unit
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU is responsible for processing non-real-time protocols and services, and realizes the functions of radio resource control (radio resource control, RRC) and packet data convergence protocol (packet data convergence protocol, PDCP) layer.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical (physical, PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU+AAU.
  • the access network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into access network devices in the access network (radio access network, RAN), and the CU can also be divided into access network devices in the core network (core network, CN). Do limited.
  • the user plane functional network element mainly includes the following functions: data packet routing and transmission, packet detection, service usage reporting, service quality (quality of service, QoS) processing, legal interception, uplink packet detection, downlink Functions related to the user plane such as packet storage.
  • the UPF can be divided into a protocol data unit session anchor UPF (protocol data unit session anchor UPF, PSA UPF) and an uplink classifier function UPF (uplink classifier functionality UPF, UL CL UPF).
  • protocol data unit session anchor UPF protocol data unit session anchor UPF
  • PSA UPF protocol data unit session anchor UPF
  • uplink classifier function UPF uplink classifier functionality UPF, UL CL UPF
  • the UPF shown in (a) in Figure 1 is the PSA UPF, and the PSA UPF is the UPF that supports the PDU session anchor function.
  • the UE is connected to the AMF through the N1 interface; the AN is connected to the AMF through the N2 interface, and connected to the PSA UPF through the N3 interface. ;
  • the PSA UPF is connected to the SMF through the N4 interface; the PSA UPF is connected to the EAS through the N6 interface.
  • PSA UPF may be referred to as PSA;
  • UL CL UPF may be referred to as UL CL for short.
  • the user plane functional network element In the 5G architecture, it is called the user plane functional network element.
  • the user plane functional network element can still be a UPF network element, or it can also have other names, which are not limited in this application.
  • Edge application server it is an application deployed in the edge data network.
  • the edge application may also be referred to as an "application instance". Specifically, it refers to an instance of a server application (for example, social media software, augmented reality (augmented reality, AR), virtual reality (virtual reality, VR)) running on the edge data network (edge data network, EDN) .
  • An application (or also called a service) can deploy one or more EASs in one or more EDNs. EASs deployed and running in different EDNs can be regarded as different EASs of an application, and they can share a domain name. It is also possible to use a different domain name from the application deployed on the cloud, where the domain name can be a fully qualified domain name (fully qualified domain name, FQDN), a free-play IP address, or a different IP address.
  • EAS can also be called edge application (server), application instance, edge application instance, multi-access edge computing (multi-access edge computing, MEC) application (server), EAS function, etc.
  • EDN can be a local data center (local part of DN).
  • EDN includes an edge enabler server (EES) and multiple EASs. Each EDN has a specific service scope.
  • EES edge enabler server
  • mobility management network elements mainly include the following functions: connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management, etc. Mobility-related functions.
  • the access and mobility management function network element In the 5G architecture, it is called the access and mobility management function network element. In the future communication system, the access and mobility management function network element can still be the AMF network element, or it can also have other names. This Applications are not limited.
  • Session function management network element mainly used for session management, Internet Protocol (IP) address allocation and management of terminal equipment, selection of manageable user plane functions, policy control and charging function interface endpoints and downlink Data Notification etc.
  • IP Internet Protocol
  • the network element with the session management function may still be an SMF network element, or may have other names, which are not limited in this application.
  • Network open function network element It can be understood as the name of the capability open network element in the 5G architecture.
  • the capability opening network element mainly includes the following functions: securely open the services and capabilities provided by the 3GPP network functions, open internally, or open to third parties, etc.; transform or translate the information interacted with AF and the information interacted with internal network functions, Such as AF service identification and internal 5G core network information such as data network name (data network name, DNN), single network slice selection assistance information (single network slice selection assistance information, S-NSSAI), etc.
  • EAS discovery function network element mainly responsible for discovering EAS, including functions such as registering with NRF for discovery and selection, processing DNS messages according to SMF instructions (for example, receiving DNS message processing rules sent by SMF, sending DNS messages to Local DNS server or central DNS server, adding ECS option to DNS query message, exchanging DNS messages sent by UE, notifying SMF of EASDF related information, etc.), terminating DNS security, etc.
  • Network storage function network element It can be understood as the name of the network storage function network element in the 5G architecture. Among them, the network storage function network element mainly includes the following functions: service discovery function, maintaining the NF text of available network function (network function, NF) instances and the services they support.
  • Policy control function network element a unified policy framework for guiding network behavior, providing policy rule information, etc. for control plane function network elements (such as AMF, SMF network elements, etc.).
  • the policy control function network element may still be a PCF network element, or may have other names, which are not limited in this application.
  • Application function network element The data routing used to influence the application provides application layer information, which can open the function network element through the access network, interact with the policy framework or directly interact with the policy framework for policy decision request control, etc.
  • the application function network element may still be an AF network element, or may have other names, which are not limited in this application.
  • Unified data management network element It can be understood as the name of the unified data management network element in the 5G architecture. Among them, the unified data management network element mainly includes the following functions: unified data management, support for authentication credential processing in the 3GPP authentication and key agreement mechanism, user identity processing, access authorization, registration and mobility management, subscription management, short message management etc.
  • the unified data management network element may still be a UDM network element, or may have other names, which are not limited in this application.
  • (b) in FIG. 1 shows a schematic architecture diagram of another 5G system 100b to which the embodiment of the present application is applicable.
  • the difference between the system 100b shown in (b) in FIG. 1 and the system 100a shown in (a) in FIG. 1 is that the 5G system in the system 100a shown in (a) in FIG. 1 is not provided through UL CL/BP Access to the EAS, the 5G system in the system 100b shown in (b) of FIG. 1 provides access to the EAS through the UL CL/BP.
  • the network architecture may include but not limited to the following network elements (or called functional network elements, functional entities, nodes, devices, etc.):
  • UE UE, (R)AN, UPF, EAS, central DN, AMF network element, SMF network element, NEF network element, EASDF network element, NRF network element, PCF network element, AF network element, UDM network element, etc.
  • the UPF shown in (b) in Figure 1 includes UL CL UPF (or called branch point UPF (branching point UPF, BPUPF)), local PSA UPF (local PSA UPF, L-PSA UPF) and central PSA UPF (central PSA UPF, C-PSA UPF).
  • UL CL UPF or called branch point UPF (branching point UPF, BPUPF)
  • local PSA UPF local PSA UPF, L-PSA UPF
  • central PSA UPF central PSA UPF, C-PSA UPF
  • the UL CL UPF is a UPF with an uplink classifier function.
  • UE connects to AMF through N1 interface;
  • AN connects to AMF through N2 interface, connects to UL CL UPF through N3 interface;
  • UL CL UPF connects to SMF through N4 interface, connects to PSA UPF through N9 interface;
  • SMF connects to PSA respectively through N4 interface UPF connection;
  • C-PSA UPF connects with central DN through N6 interface;
  • L-PSA UPF connects with EAS through N6 interface.
  • the processing in the architecture shown in (b) in Figure 1 includes not only the EAS but also the central DN.
  • the above-mentioned network element or functional network element may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • network elements can communicate with each other through the interfaces shown in the figure, and some interfaces can be implemented in the form of non-service interfaces.
  • the UE and the AMF may interact through an N1 interface, and the interaction message may be called an N1 message (N1Message), for example.
  • N1Message N1 message
  • the RAN and the AMF can interact through the N2 interface, and the N2 interface can be used for sending non-access stratum (non-access stratum, NAS) messages, etc.
  • the RAN and UPF can interact through the N3 interface, and the N3 interface can be used to transmit user plane data, etc.
  • the SMF and UPF can interact through the N4 interface, and the N4 interface can be used to transmit information such as the tunnel identification information of the N3 connection, data cache indication information, and downlink data notification messages.
  • the UPF and DN can interact through the N6 interface, and the N6 interface can be used to transmit data on the user plane.
  • each network element of the control plane function in Figure 1 can also communicate through the service interface.
  • AMF accesses the service architecture through the Namf interface to provide corresponding services;
  • NRF, PCF, and AF access the service architecture through their corresponding interfaces to provide corresponding services, which will not be repeated here.
  • the relationship between other interfaces and each network element is shown in FIG. 1 , and for the sake of brevity, details are not described here one by one.
  • AMF, SMF, UPF, PCF, etc. shown in FIG. 1 can be understood as network elements for implementing different functions, for example, they can be combined into network slices as required. These network elements can be independent devices, or can be integrated in the same device to achieve different functions, or can be network elements in hardware devices, or software functions running on dedicated hardware, or platforms (for example, cloud The virtualization function instantiated on the platform), this application does not limit the specific form of the above network elements.
  • the name of the interface between network elements in FIG. 1 is just an example, and the name of the interface in a specific implementation may be another name, which is not specifically limited in this application.
  • the name of the message (or signaling) transmitted between the above network elements is only an example, and does not constitute any limitation on the function of the message itself.
  • Fig. 2 is a schematic flowchart of a method for discovering EAS. Include the following steps:
  • the UE initiates a session establishment process.
  • the UE starts an application (application, APP) to initiate a session establishment procedure or reuses an existing session of the UE to establish a user plane connection between the UE and the UPF.
  • application application, APP
  • the SMF selects EASDF, and the method flow shown in Figure 2 also includes:
  • the SMF selects EASDF.
  • the SMF may send the identifier of the selected EASDF (for example, the IP address of the EASDF) to the UE.
  • SMF can choose UPF PSA.
  • a DNS message processing rule is established between the SMF and the EASDF, and the method flow shown in Fig. 2 also includes:
  • the SMF interacts with the EASDF to establish DNS message processing rules on the EASDF.
  • SMF sends a DNS context establishment request message to EASDF (for example, it can be Neasdf_DNSContext_Create Request);
  • EASDF sends a DNS context establishment response message (for example, Neasdf_DNSContext_Create Response) to SMF.
  • a DNS context establishment response message for example, Neasdf_DNSContext_Create Response
  • the method flow shown in Figure 2 also includes:
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends a DNS context update request message to EASDF (for example, it can be Neasdf_DNSContext_Update Request);
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the method flow shown in Figure 2 also includes:
  • the UE sends DNS query information to the EASDF.
  • the DNS query information is sent to the EASDF through the RAN and the UPF.
  • the FQDN of the APP is carried in the DNS query information.
  • the EASDF After the EASDF receives the DNS query information, it notifies the SMF according to the above-mentioned DNS message processing rules, and the method flow shown in Fig. 2 also includes:
  • the EASDF sends a notification request message (for example, Neasdf_DNSContext_Notify Request) to the SMF.
  • a notification request message for example, Neasdf_DNSContext_Notify Request
  • the notification request message carries the FQDN of the APP.
  • the SMF sends a notification response message (for example, Neasdf_DNSContext_Notify Response) to the EASDF.
  • a notification response message for example, Neasdf_DNSContext_Notify Response
  • the SMF determines the information for constructing the ECS option or the information for determining the address of the local DNS server (such as IP address) according to the FQDN of the APP, EAS deployment information, UE location, etc., and will construct the information of the ECS option or the local DNS server The address is sent to EASDF.
  • the EAS deployment information is the corresponding relationship between FQDN, IP address (address), and data network access identifier (data network access identifier, DNAI)
  • SMF determines the information used to construct the ECS option
  • the information used to construct the ECS option may be an IP address, wherein the IP address in the EAS deployment information and the information used to construct the ECS option may be an address range, for example, a certain IP subnet.
  • SMF determines the local DNS server address.
  • the method flow shown in Figure 2 also includes:
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends a DNS context update request message to EASDF (for example, it can be Neasdf_DNSContext_Update Request);
  • the DNS context update request message includes the information for constructing the ECS option, or the address of the local DNS server.
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the EASDF sends DNS query information to the DNS server.
  • the DNS query message contains the ECS option; or, EASDF sends the DNS query message to the local DNS server.
  • the ECS option can be constructed by EASDF according to the information of constructing ECS option, or can be constructed by SMF according to the information of constructing ECS option.
  • the EASDF receives the DNS response message sent by the DNS server.
  • the DNS response message carries the EAS IP.
  • the EASDF sends a notification request message (for example, Neasdf_DNSContext_Notify Request) to the SMF.
  • a notification request message for example, Neasdf_DNSContext_Notify Request
  • the notification message carries the EAS IP.
  • the SMF sends a notification response message (for example, Neasdf_DNSContext_Notify Response) to the EASDF.
  • a notification response message for example, Neasdf_DNSContext_Notify Response
  • SMF determines DANI based on FQDN, EAS IP, and EAS deployment information, and inserts ULCL UPF and L-PSA at the DNAI position, and the method flow shown in Figure 2 also includes:
  • S223, SMF inserts ULCL UPF and L-PSA.
  • the UPF (or transmission path) selected by the SMF may not need to be changed, that is, there is no need to insert the ULCL UPF and L-PSA.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends a DNS context update request message to EASDF (for example, it can be Neasdf_DNSContext_Update Request);
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the EASDF sends a DNS response message to the UE.
  • the DNS response message carries the EAS IP.
  • the SMF determines the information to process the DNS query sent to the EASDF (such as the information for constructing the ECS option, or the DNS server identifier), it considers FQDN and EAS deployment information (such as FQDN, Correspondence between IP address, DNS server identifier, and DNAI) and UE location.
  • FQDN and EAS deployment information such as FQDN, Correspondence between IP address, DNS server identifier, and DNAI
  • FQDN Correspondence between IP address, DNS server identifier, and DNAI
  • this application provides a method for discovering edge application servers.
  • SMF adds additional considerations (for example, the selection weight of EAS, the load of EAS) when determining the information for processing DNS query status, EAS service status or EAS that cannot provide services for UEs, etc.), to avoid situations where the edge computing platform or EAS corresponding to the determined DNS query information is overloaded, or the platform upgrade server cannot provide services, etc.
  • the method provided in the embodiment of the present application may be applied to a 5G communication system, for example, the communication system shown in FIG. 1 .
  • this embodiment of the present application does not limit the scenarios where this method can be applied, for example, it is also applicable to other network architectures that include network elements that can realize corresponding functions
  • the evolved packet system (EPS) defined in the 3rd generation partnership project (3GPP) includes the 5G network architecture based on the service interface or the 5G network architecture based on the point-to-point interface.
  • the 5G network can It is divided into three parts, namely UE, DN and operator network.
  • the operator's network may include one or more of the network elements shown in Figure 1 except UE and DN, or may also include other network elements.
  • This application does not limit the structure of the 5G network. Introduction in related technologies.
  • the traditional centralized anchor point deployment method in LTE is becoming more and more difficult to support the fast-growing mobile service traffic model.
  • the increased traffic is finally concentrated at the gateway and the core computer room, which puts forward higher and higher requirements for the backhaul network bandwidth, the throughput of the computer room, and the specifications of the gateway;
  • the long-distance backhaul network and complex transmission environment from the access network to the anchor gateway lead to large delay and jitter in the transmission of user packets.
  • edge computing By moving the user plane network elements and business processing capabilities down to the edge of the network, edge computing realizes distributed local processing of business traffic and avoids excessive concentration of traffic, thereby greatly reducing the specification requirements for core computer rooms and centralized gateways. At the same time, edge computing also shortens the distance of the backhaul network, reduces the end-to-end transmission delay and jitter of user packets, and makes the deployment of ultra-low-latency services possible.
  • Fig. 3 is a schematic diagram of an edge computing scenario.
  • the edge computing platform is deployed at the sinking UPF (that is, the local UPF); the DN network is deployed at the remote UPF.
  • the path for the UE to access the DN shown by the dotted line in FIG. 3
  • the path for the UE to access the edge computing platform is greatly shortened. Therefore, edge computing technology can provide users with low-latency, high-bandwidth services.
  • DNS is a host information database that provides mapping and conversion between domain names and IP addresses.
  • the UE can resolve the domain name to the corresponding IP address through the DNS server. In this way, the access of the UE to the service is realized.
  • FIG. 4 is a schematic flowchart of a DNS query. Taking UE starting an application as an example to illustrate the DNS query process, specifically, before executing the DNS query, it includes:
  • the UE starts an application (application, APP).
  • starting the APP by the UE includes: the UE initiates a session establishment process or reuses an existing session of the UE to establish a user plane connection between the UE and the UPF.
  • the SMF sends the DNS server address to the UE.
  • DNS records refer to the correspondence between domain names and IP addresses.
  • the UE determines the IP address corresponding to the domain name according to the DNS record. And use the IP address as the destination IP of the service.
  • the UE initiates a DNS query process. Include the following steps:
  • the UE sends a DNS query message to the DNS server.
  • the DNS query message carries the domain name of the service. Specifically, the DNS query message is sent to the DNS server through the user plane connection between the UE and the UPF.
  • the method flow shown in Figure 4 also includes:
  • the DNS server determines the DNS record.
  • the DNS server queries the database to obtain the IP address corresponding to the domain name.
  • the method flow shown in Figure 4 also includes:
  • the DNS server sends a DNS response message to the UE.
  • the DNS response message carries the IP address corresponding to the domain name and the time to live (TTL).
  • TTL time to live
  • the time to live indicates the time that DNS records can be cached. 0 means that the DNS record cannot be cached.
  • the UE may save the DNS record, and the method flow shown in FIG. 4 also includes:
  • the UE stores the corresponding relationship between the domain name and the IP address.
  • the load status of EAS can be a comprehensive representation of the operating status of various system resources of an EAS. /O) usage status, number of connected users, number of requested connections, or bandwidth, etc., may also be multiple or all of them. When the operating status of these resources reaches a certain level, it may no longer be able to provide services to users, or no longer accept access from new users. At this time, it can be considered that the EAS is overloaded.
  • the load states of different EASs of the same application may be different, and different EASs of different applications may also be different. That is to say, different applications can independently collect statistics on the load status of their corresponding EAS. For example, when the EAS for the first application is overloaded, the EAS for the second application may also be in a normal state.
  • the service status of the EAS may be a representation of whether an EAS can provide services, for example, the service status of the EAS may be link unreachable, online, shutdown, crash, or system upgrade.
  • the selection weight of EAS involved in the embodiment of this application can be understood as the selection preference and/or selection probability of DNAI corresponding to the edge computing platform provided by AF, or it can also be understood as the corresponding edge application in the edge computing platform provided by AF DNAI selection preferences and/or selection probabilities.
  • the "preference” can be expressed in the form of priority; the “probability” can be expressed based on numbers (eg, numbers between 0 and 1).
  • one DNAI corresponds to one selection weight
  • one DNAI corresponds to one selection weight list
  • multiple selection weights in the selection weight list correspond to multiple FQDNs respectively.
  • DNAI can be understood as the user plane access identifier of the data network where the edge computing application is deployed.
  • the selection weight of the EAS may also be referred to as a selection weighting factor of the EAS, or selection information, and the like.
  • the embodiments shown below do not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the present application can be run to provide the method according to the embodiment of the present application.
  • the execution subject of the method provided by the embodiment of the present application may be a core network device, or a functional module in the core network device that can call a program and execute the program.
  • for indicating can be understood as “enabling”, and “enabling” can include direct enabling and indirect enabling.
  • enabling can include direct enabling and indirect enabling.
  • information for enabling A it may include that the information directly enables A or indirectly enables A, but it does not mean that A must be carried in the information.
  • the information enabled by the information is called the information to be enabled.
  • the information to be enabled can be directly enabled.
  • the to-be-enabled information may also be indirectly enabled by enabling other information, where there is an association relationship between the other information and the to-be-enabled information.
  • specific information can also be enabled by means of a pre-agreed (for example, protocol-specified) arrangement order of each information, thereby reducing the enabling overhead to a certain extent.
  • common parts of each information can be identified and enabled uniformly, so as to reduce the enabling overhead caused by enabling the same information separately.
  • pre-configuration may include pre-definition, for example, protocol definition.
  • predefinition for example, protocol definition.
  • "predefine” can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate related information in the device (for example, including each network element), and this application does not limit its specific implementation.
  • the "storage" mentioned in the embodiment of the present application may refer to saving in one or more memories.
  • the one or more memories may be provided independently, or may be integrated in an encoder or decoder, a processor, or a communication device.
  • a part of the one or more memories may also be provided separately, and a part may be integrated in a decoder, a processor, or a communication device.
  • the type of the storage may be any form of storage medium, which is not limited in this application.
  • the "protocol” involved in the embodiment of this application may refer to a standard protocol in the communication field, for example, it may include 5G protocol, new radio (new radio, NR) protocol and related protocols applied in future communication systems. Applications are not limited to this.
  • Fig. 5 is a schematic flowchart of a method for discovering an edge application server provided by an embodiment of the present application.
  • the session management function network element is the SMF in the 5G network
  • the application function network element is the AF in the 5G network
  • the user plane function network element is the UPF in the 5G network
  • the terminal device is the UE.
  • the names of the network elements or devices there is no limitation on the names of the network elements or devices, and other network elements capable of realizing corresponding functions are also within the scope of protection of the present application.
  • the SMF obtains first indication information or information of at least one edge application server EAS.
  • the SMF is a network element that provides services for sessions of terminal devices.
  • the information obtained by the SMF may be understood as the SMF receives information from other network elements (eg, AF), and may also be understood as the SMF determines to obtain the information by itself.
  • the EAS information is used to indicate at least one of the following:
  • the load state of the EAS the service state of the EAS, or the selection weight of the EAS.
  • the first indication information is used to indicate an EAS that cannot provide services for the terminal device.
  • the above EAS information may be indication information indicating whether the EAS is overloaded.
  • the load of the computing platform exceeds 80%, the information of the EAS is sent, and the information of the EAS indicates overload; when the load of the EAS or the edge computing platform is lower than 50%, the information of the EAS is sent, and the information of the EAS indicates that it is not overloaded (or lightly loaded) ).
  • the EAS information is sent, and the EAS information indicates overload; when the resource utilization of the EAS or the edge computing platform is lower than 50%, the EAS information is sent, and the EAS A message indicating no overload (or light load).
  • the aforementioned EAS information may be a percentage of the load of the EAS.
  • the information of the EAS is sent, and the information of the EAS indicates that the load exceeds 80%, and the EAS overload can be determined based on the information of the EAS; when the load of the EAS or the edge computing platform The EAS information is sent if it is lower than 50%, the EAS information indicates that the load is lower than 50%, and it may be determined that the EAS is not overloaded (or lightly loaded) based on the first indication information.
  • the above EAS information may be a percentage of resource usage of the EAS.
  • the information of the EAS is sent, and the information of the EAS indicates that the resource utilization exceeds 80%, and it can be determined based on the information of the EAS that the EAS is overloaded; when the resource utilization of the EAS or the edge computing platform If the resource usage is lower than 50%, the EAS information is sent, and the EAS information indicates that the resource usage is lower than 50%, and it can be determined that the EAS is not overloaded (or lightly loaded) based on the EAS information.
  • the EAS information may be indication information indicating whether the EAS is overloaded, the percentage of the load of the EAS or the percentage of the resource utilization of the EAS, etc., which does not constitute any limitation on the protection scope of the present application, and other information can be used
  • the EAS information indicating the load status of the EAS is also within the protection scope of the present application.
  • the EAS information is indication information indicating the number of Apps served by the EAS.
  • the information of the EAS may be indication information indicating whether the EAS is overloaded, or may be a percentage of the load of the EAS or a percentage of the resource utilization of the EAS. It can be understood that if it is the indication information indicating whether the EAS is overloaded, the information of the EAS can be sent when it is overloaded; if it is the percentage of the load of the EAS or the percentage of the resource utilization of the EAS, it is necessary to send the EAS when the percentage changes Relatively speaking, the percentage of the load of the EAS or the percentage of the resource utilization of the EAS needs to be sent dynamically.
  • the above EAS information may be indication information indicating whether the EAS link is reachable.
  • EAS link when a certain EAS link is unreachable, send EAS information, and the EAS information indicates that the EAS link is unreachable; when a certain EAS link is reachable, send EAS information, The information of the EAS indicates that the link of the EAS is reachable.
  • the above EAS information may be indication information indicating whether the EAS is online.
  • the EAS information is sent, and the EAS information indicates that the EAS is not online; when an EAS is online, the EAS information is sent, and the EAS information indicates that the EAS is online.
  • the above EAS information may be indication information indicating whether the EAS is powered off.
  • the above EAS information may be indication information indicating whether the EAS is dead.
  • the information of the EAS is sent, and the information of the EAS indicates that the EAS is not dead; in the case of a certain EAS, the information of the EAS is sent, and the information of the EAS indicates that the EAS is dead.
  • the above EAS information may be indication information indicating whether the EAS is being upgraded.
  • the EAS information indicates that the EAS is not in the system upgrade; in the case of a certain EAS in the system upgrade, send the EAS information, the EAS information Indicates that EAS is in the process of system upgrade.
  • the EAS information can be indication information indicating whether the EAS link is reachable, online, powered off, dead, in system upgrade state, etc., and does not constitute any limitation on the protection scope of the present application.
  • Other EAS information that can be used to indicate the service status of the EAS is also within the protection scope of the present application, for example, the EAS information is indication information indicating the time of the EAS service.
  • the above EAS information may indicate the selection weight of the DNAI corresponding to the edge computing platform.
  • the selection weight of DNAI#1 corresponding to edge computing platform #1 is 0.4, and the selection weight of DNAI#2 corresponding to edge computing platform #1 is 0.6, the selection weight of DNAI#1 corresponding to edge computing platform #2 is 0.3 , when the selection weight of DNAI#2 corresponding to edge computing platform #2 is 0.7, the EAS information is sent, and the EAS information indicates that the selection weights of DNAI#1 and DNAI#2 corresponding to all edge applications of edge computing platform #1 are respectively are 0.4 and 0.6, indicating that the selection weights of DNAI#1 and DNAI#2 corresponding to all edge applications of edge computing platform #2 are 0.3 and 0.7, respectively.
  • EAS information is sent, and the EAS information indicates edge computing platform #
  • the selection weight of DNAI#1 corresponding to all edge applications of 1 is 0.4, indicating that the selection weight of DNAI#2 corresponding to all edge applications of edge computing platform #2 is 0.6.
  • the above EAS information may indicate the selection weight of the DNAI corresponding to the edge application of the edge computing platform.
  • the selection weights of DNAI#1 and DNAI#2 corresponding to edge application #1 in edge computing platform #1 are 0.1 and 0.2 respectively
  • edge application #2 in edge computing platform #1 corresponds to DNAI#1 and DNAI#
  • the selection weights of 2 are 0.1 and 0.1 respectively.
  • the selection weights of DNAI#1 and DNAI#2 corresponding to edge application #1 in edge computing platform #2 are 0.4 and 0.3 respectively.
  • Edge application #2 in edge computing platform #2 The selection weights of the corresponding DNAI#1 and DNAI#2 are 0.1 and 0.4 respectively, and the EAS information is sent, and the EAS information indicates the selection of DNAI#1 and DNAI#2 corresponding to the edge application #1 in the edge computing platform #1
  • the weights are 0.1 and 0.2 respectively, indicating that the selection weights of DNAI#1 and DNAI#2 corresponding to edge application #2 in edge computing platform #1 are 0.1 and 0.1 respectively, indicating that edge application #1 in edge computing platform #2 corresponds to
  • the selection weights of DNAI#1 and DNAI#2 are 0.4 and 0.3 respectively, indicating that the selection weights of DNAI#1 and DNAI#2 corresponding to edge application #2 in edge computing platform #2 are 0.1 and 0.4 respectively.
  • the selection weights of DNAI#1 corresponding to edge application #1 and edge application #2 in edge computing platform #1 are 0.1 and 0.2 respectively
  • edge application #1 and edge application #2 in edge computing platform #2 correspond to The selection weights of DNAI#2
  • the EAS information is sent.
  • the EAS information indicates that the selection weights of DNAI#1 corresponding to edge application #1 and edge application #2 in edge computing platform #1 are 0.1 respectively and 0.2, indicating that the selection weights of DNAI #2 corresponding to edge application #1 and edge application #2 in edge computing platform #2 are 0.9 and 0.8, respectively.
  • the above selection weight can be understood as the selection probability of the corresponding DNAI, for example, the selection probability can be represented by a number between 0 and 1, and the greater the value, the greater the selection probability.
  • the above-mentioned selection weight can be understood as the selection preference (or priority) of the corresponding DNAI.
  • the selection preference can be represented by a number between 0 and 1. The larger the value, the selected The higher the priority.
  • the above selection weight can be understood as the selection probability and selection preference (or priority) of the corresponding DNAI.
  • the selection probability can be represented by a number between 0 and 1, and the value The larger the value, the greater the probability of selection; the selection preference can be represented by a number between 0 and 1, the larger the value, the higher the priority of selection, and the selection weight is the average of the selection probability and selection preference.
  • the above-mentioned first indication information may be an identifier of a certain EAS, and the identification information is used to indicate a certain EAS.
  • the identifier of the EAS may be an IP address of a certain EAS, or a name of a certain EAS, or information such as an FQDN used to determine a certain EAS.
  • first indication information may be information indicating EAS, and does not constitute any limitation to the protection scope of this application, and other first indication information that can be used to indicate EAS is also within the protection scope of this application.
  • the SMF when the SMF obtains the information of multiple EASs, the SMF may separately obtain the information of each EAS in some or all of the EASs.
  • the SMF can obtain the information of at least one EAS in multiple ways, and the following methods 1, 2, 3, 4 and 5 are used as examples to illustrate, and the five methods can also be combined with each other.
  • the SMF obtains the above at least one EAS information from the AF.
  • the SMF receives information of at least one EAS from the AF, or the AF sends information of at least one EAS to the SMF.
  • the information of at least one EAS may be information of at least one edge computing platform, at least one EAS is deployed in at least one edge computing platform, and the information of at least one edge computing platform is used to indicate the information of at least one EAS.
  • the edge computing platform can be understood as an EDN or an edge enabler server (edge enabler server, EES), etc., or it can also be another platform on which EAS is deployed.
  • EES edge enabler server
  • the specific embodiment of the edge computing platform in the embodiment of the present application The format is not limited.
  • the SMF obtains the information of the edge computing platform (such as the selection weight of the edge computing platform, whether the edge computing platform is overloaded, the service status of the edge computing platform), etc., it can indirectly obtain the selection weight of the EAS deployed in the edge computing platform , load information, or service status information. If an edge computing platform is overloaded, all EASs deployed on the edge computing platform are overloaded; if the edge computing platform is in a state of being unable to provide services, none of the EASs deployed on the edge computing platform can provide services.
  • the SMF may send reply information to the AF to indicate that the information of the EAS is received.
  • the AF may proactively provide the information of the above at least one EAS to the SMF.
  • AF can provide EAS information to SMF through the current AF influence on traffic routing (AF influence on traffic routing) process.
  • the AF influence on traffic routing process is not described in detail in the embodiment of the present application, and reference can be made to the current description of the AF influence on traffic routing process. The difference is that in the AF influence on traffic routing process in the embodiment of the present application, The AF may provide the information of at least one EAS mentioned above to the SMF.
  • the information of the EAS or the information of the edge computing platform is added in the message sent by the AF to the SMF in the process of AF influence on traffic routing.
  • the AF may trigger the provision of the at least one EAS information to the SMF based on the subscription or request of the SMF.
  • the SMF sends subscription information or request information to the AF to obtain the above-mentioned at least one EAS information.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends subscription information or request information to the AF, or the AF receives the subscription information or request information from the SMF.
  • the AF may carry the above-mentioned at least one EAS in the second message in response to the subscription information or request information (or collectively referred to as the first message) Information.
  • the SMF can also obtain other information (such as the FQDN of the APP, EAS deployment information, UE location, etc.) through the current process (the process shown in Figure 2), the other information and
  • the above-mentioned information of at least one edge application server EAS obtained through the first method is used to determine the information of constructing the ECS option, or used to determine the address of the local DNS server. The following will be described in conjunction with specific embodiments, and will not be repeated here.
  • the SMF determines the above at least one EAS information based on the data packet detection result obtained from the UPF.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends the second indication information to the UPF, or the UPF receives the second indication information from the UPF.
  • the second indication information is used to instruct UPF to detect the first data packet, and the destination IP address of the first data packet is the IP address of the first EAS (or the first data packet is the first EAS whose destination IP address is the first EAS). IP address packets).
  • UPF is L-PSA UPF, or UPF is ULCL UPF.
  • the first EAS is any one of the above at least one EAS. That is to say, the SMF may use the indication information to instruct the UPF to respectively detect data packets whose destination IP addresses are IP addresses of different EASs.
  • the SMF can respectively instruct the UPF to detect different data packets through multiple pieces of second indication information, specifically: the SMF instructs the UPF to detect the first data packet #1 through the second indication information #1, the first data
  • the IP address of the packet #1 is the IP address of the first EAS#1
  • the SMF instructs the UPF to detect the first data packet #2 through the second indication information #2
  • the IP address of the first data packet #2 is the first IP address of EAS#2.
  • the first EAS#1 and the first EAS#2 are different EASs.
  • the second indication information includes the IP address of the first EAS and detection indication information.
  • the detection indication information may be used to instruct the UPF to perform deep packet inspection (Deep Packet Inspection, DPI) on packets related to the first EAS;
  • DPI Deep Packet Inspection
  • the detection indication information may also be used to instruct the UPF to detect and report the traffic information of the first EAS, the round-trip delay information of the first data packet between the UPF and the first EAS, and other information.
  • the SMF may send the second indication information to the UPF through the N4 session establishment request;
  • the SMF may send the second indication information to the UPF through the N4 session modification request.
  • the SMF can send the second indication information to the UPF, and does not constitute any limitation on the protection scope of this application.
  • the SMF actively sends the second indication information to the UPF; for example, the protocol pre-defines that the SMF needs to send the second indication information to the UPF; for another example, the SMF is based on indications from other devices (such as management devices) The second indication information is sent to the UPF, which will not be described here one by one.
  • the UPF may send the second reply information to the SMF, and the method flow shown in FIG. 5 further includes:
  • the UPF sends the second reply information to the SMF, or the SMF receives the second reply information from the UPF.
  • the UPF may send the second reply information to the SMF through the N4 session establishment reply;
  • the UPF may send the second reply information to the SMF through the N4 session modification reply.
  • the UPF may not send the second reply information after receiving the second indication information.
  • the UPF After the UPF receives the above-mentioned second indication information, it performs data packet detection based on the second indication information, and the method flow shown in FIG. 5 also includes:
  • the UPF performs packet detection.
  • the UPF collects statistics on the traffic information of the first EAS, and the round-trip delay (or transmission delay) information of the first data packet between the UPF and the first EAS.
  • UPF can detect the corresponding two first data packets (the destination IP address of the first data packet is the IP address of the first EAS, and the source IP address of the other first data packet is the IP address of the first EAS). IP address of an EAS) to obtain the round-trip delay.
  • the precondition for the UPF to detect the first data packet is that the first data packet is transmitted between the UE and the first EAS.
  • the UE performing the first data packet transmission with the first EAS is other UEs (except UEs currently performing EAS discovery);
  • the UE that performs the first data packet transmission with the first EAS is the current UE.
  • the detection result needs to be sent to the SMF, and the method flow shown in Figure 5 also includes:
  • the UPF sends the first report information to the SMF, or the SMF receives the first report information from the UPF.
  • the first report information includes the detection result of the first data packet, and the detection result includes traffic information of the first EAS, round-trip delay information of the first data packet between the UPF and the first EAS, and the like.
  • the first report information may also include the above-mentioned IP address of the first EAS, or the SMF locally saves the IP address of the first EAS without the UPF reporting the IP address of the first EAS through the first report information.
  • the UPF may send the first report information to the SMF through the N4 session.
  • the following uses the first reported information to determine the information of the first EAS as an example.
  • the information of other EASs can also be determined according to the first reported information. 2 to detect, the first data packet #2 is a data packet whose destination IP address is the IP address of the first EAS#2, and the SMF can determine the information of the first EAS#1 according to the first reported information, and the determination method is the same as that of the first EAS#1 determined by the SMF
  • the information of the EAS is similar, and will not be repeated here.
  • the SMF determines the information of the at least one EAS based on the first report information.
  • the SMF determines the information of the first EAS directly according to the first reported information.
  • the method flow shown in Figure 5 also includes:
  • the SMF determines the information of at least one EAS according to the first reported information.
  • the SMF determining the information of the first EAS according to the first reported information includes: the SMF determining the load status of the first EAS according to the traffic information of the first EAS. If the visit volume of the first EAS is large (for example, exceeding the preset overload upper limit threshold), it is determined that the load state of the first EAS is overloaded; if the visit volume of the first EAS is small (for example, lower than the preset overload lower limit threshold) determine The load state of the first EAS is light load.
  • the SMF determining the information of the first EAS according to the first reported information further includes: the SMF determining the service state of the first EAS according to the round-trip delay information of the first data packet between the UPF and the first EAS. If the round-trip delay is large (for example, exceeding the preset delay upper limit threshold), determine that the service status of the first EAS is unable to provide services; if the round-trip delay is small (for example, lower than the preset delay lower limit threshold), determine that the first The service status of EAS is available for service.
  • the SMF may send the received first report information to the NWDAF, and the NWDAF performs data analysis to determine the information of the first EAS, and then sends the information of the first EAS to the SMF.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends the first report information to the NWDAF, or the NWDAF receives the first report information from the SMF.
  • the NWDAF determines the information of the first EAS.
  • the NWDAF performs data analysis based on the first reported information to determine the information of the first EAS.
  • the NWDAF determining the information of the first EAS according to the first reported information includes: the NWDAF determining the load status of the first EAS according to the traffic information of the first EAS. If the visit volume of the first EAS is large (for example, the conclusion drawn by using the data analysis function), it is determined that the load status of the first EAS is overloaded; if the visit volume of the first EAS is small (for example, the conclusion drawn by the use of the data analysis function) It is determined that the load state of the first EAS is light load.
  • the NWDAF determining the information of the first EAS according to the first reported information further includes: the SMF determining the service state of the first EAS according to the round-trip delay information of the first data packet between the UPF and the first EAS. If the round-trip time delay is large (for example, the conclusion drawn by using the data analysis function) determine that the service status of the first EAS is unable to provide services; if the round-trip time delay is small (for example, the conclusion drawn by using the data analysis function) determine the first EAS The service status of the service is available.
  • the NWDAF sends the information of the first EAS to the SMF, and the method flow shown in Figure 5 also includes:
  • the NWDAF sends the information of the first EAS to the SMF.
  • the SMF can also obtain other information (such as the FQDN of the APP, EAS deployment information, UE location, etc.) through the current process (the process shown in Figure 2), the other information and
  • the above-mentioned information of at least one edge application server EAS obtained through the second method is used to determine the information of constructing the ECS option, or to determine the address of the local DNS server. The following will be described in conjunction with specific embodiments, and will not be repeated here.
  • Mode 3 The SMF determines the information of the above at least one EAS based on the network detection result obtained from the UPF.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends third indication information to the UPF, or the UPF receives the third indication information from the UPF.
  • the third indication information is used to instruct the UPF to perform network detection to determine the state of the first EAS.
  • UPE is L-PSA UPF, or UPF is ULCL UPF.
  • the first EAS may be any one of the above at least one EAS. That is to say, the SMF can instruct the UPF to respectively determine the states of different EASs through the indication information.
  • the SMF instructs the UPF to determine the state of the first EAS#1 through the third indication information #1; the SMF instructs the UPF to determine the state of the first EAS#2 through the third indication information #2.
  • the first EAS#1 and the first EAS#2 are different EASs.
  • the third indication information includes the IP address of the first EAS.
  • the third indication information may not include the IP address of the first EAS, and the third indication information only needs to trigger the UPF to perform network detection.
  • the SMF may send third indication information to the UPF through the N4 session establishment request;
  • the SMF may send the third indication information to the UPF through the N4 session modification request.
  • the SMF can send the third indication information to the UPF, and does not constitute any limitation on the protection scope of this application.
  • the SMF actively sends the third indication information to the UPF; for example, the protocol pre-determines that the SMF needs to send the third indication information to the UPF; for another example, the SMF is based on the indication of other devices (such as management devices)
  • the third indication information is sent to the UPF, which will not be described here one by one.
  • the UPF may send third reply information to the SMF, and the method flow shown in FIG. 5 further includes:
  • the UPF sends third reply information to the SMF, or the SMF receives the third reply information from the UPF.
  • the UPF may send the third reply information to the SMF through the N4 session establishment reply;
  • the UPF may send the third reply information to the SMF through the N4 session modification reply.
  • the UPF may not send the third reply information after receiving the third indication information.
  • the UPF after receiving the third indication information, the UPF performs network detection based on the third indication information.
  • the method flow shown in Figure 5 also includes:
  • the UPF sends the detection data packet to the first EAS, or the first EAS receives the detection data packet from the UPF.
  • the detection data packet is used to detect the state of the first EAS.
  • the detection packet may be a Ping packet, a transmission control protocol (transmission control protocol, TCP) port detection packet, or a hypertext transfer protocol (hyper text transfer protocol, HTTP) global resource locator (uniform resource locator, URL) ) detect packets, etc.
  • TCP transmission control protocol
  • HTTP hypertext transfer protocol
  • URL uniform resource locator
  • the server and network system status can be detected by Ping, which can roughly detect whether the operating system on the network and the server is normal; when the detection data packet is a TCP port detection packet In this case, it is judged whether the service is normal by detecting whether a certain TCP port on the server is open, such as detecting the TCP port corresponding to the edge computing service; when the detection data packet is an HTTP URL detection packet, the content-based automated test The principle is to send an access request to a hypertext markup language (hypertext markup language, html) (eg, main.html) file to the HTTP server. If an error message is received, the server is considered to be faulty.
  • a hypertext markup language hypertext markup language (hypertext markup language, html) (eg, main.html) file
  • the UPF calculates and judges the state of the first EAS according to whether the first EAS replies to the data packet and information in the reply data packet.
  • the method flow shown in Figure 5 also includes:
  • the UPF determines the state of the first EAS.
  • the UPF does not receive a corresponding reply data packet after sending a Ping packet to the first EAS, or receives an error indication, it considers that the service of the first EAS (or edge computing platform) cannot be obtained, and the state of the first EAS may be ( or edge computing platform) may be in a link unreachable state.
  • UPF sends a TCP port detection packet to the first EAS and receives a reply packet indicating that the port is unreachable, indicating that the state of the first EAS may be that the first EAS (or the corresponding edge computing service) is unavailable, or the first EAS The load on the EAS is too high.
  • the UPF sends an access request to the HTTP server for the main.html file, and if an error message is received, it is considered that the state of the first EAS may be that the corresponding first EAS is faulty, and may be in a state of being unable to provide services.
  • the above description is based on the UPF detecting the state of the first EAS as an example.
  • the UPF can also detect the states of multiple EASs (for example, the UPF sends detection packets to multiple EASs respectively), or it can also detect
  • the specific detection method of the state of an edge computing platform (for example, the UPF sends detection packets to the EASs deployed in a certain edge computing platform) is the same as that of the UPF determining the state of the first EAS, and will not be described again.
  • the method flow shown in FIG. 5 also includes:
  • the UPF sends the second report information to the SMF, or the SMF receives the second report information from the UPF.
  • the second report information includes indication information indicating the state of the first EAS.
  • the second report information may also include the IP address of the first EAS, or the SMF locally saves the IP address of the first EAS without the UPF reporting the IP address of the first EAS through the first report information.
  • the UPF may send the second report information to the SMF through the N4 session.
  • the following uses the second reported information to determine the information of the first EAS as an example.
  • Information of other EASs can also be determined according to the second reported information.
  • the above-mentioned third indication information instructs the UPF to determine the information of the first EAS#2.
  • the SMF may determine the information of the first EAS#2 according to the second reported information, and the determination method is similar to that of the SMF determining the information of the first EAS, which will not be repeated here.
  • the SMF determines the information of the at least one EAS based on the second report information.
  • the SMF directly determines the information of the first EAS according to the second reported information.
  • the method flow shown in Figure 5 also includes:
  • the SMF determines the information of at least one EAS according to the second reported information.
  • the SMF determining the information of the first EAS according to the second reported information includes: the SMF determining the load status of the first EAS according to the status of the first EAS.
  • the SMF determining the information of the first EAS according to the first reported information further includes: the SMF determining the service state of the first EAS according to the state of the first EAS.
  • the SMF may send the received second report information to the NWDAF, and the NWDAF performs data analysis to determine the information of the first EAS, and then sends the information of the first EAS to the SMF.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends the second report information to the NWDAF, or the NWDAF receives the second report information from the SMF.
  • the NWDAF determines the information of the first EAS.
  • the NWDAF performs data analysis based on the second reported information to determine the information of the first EAS.
  • the NWDAF determining the information of the first EAS according to the second reported information includes: the NWDAF determining the load status of the first EAS according to the status of the first EAS.
  • the NWDAF determining the information of the first EAS according to the first reported information further includes: the NWDAF determining the service state of the first EAS according to the state of the first EAS.
  • the NWDAF sends the information of the first EAS to the SMF, and the method flow shown in Figure 5 also includes:
  • the NWDAF sends the information of the first EAS to the SMF.
  • the SMF can also obtain other information (such as the FQDN of the APP, EAS deployment information, UE location, etc.) through the current process (the process shown in Figure 2), the other information and
  • the above-mentioned information of at least one edge application server EAS obtained through the third method is used to determine the information of constructing the ECS option, or used to determine the address of the local DNS server. The following will be described in conjunction with specific embodiments, and will not be repeated here.
  • the SMF may obtain the first indication information in the following manner.
  • the first indication information is used to indicate the EAS that cannot provide services for the terminal device. It should be understood that the EAS that cannot provide services for the UE refers to the determined EASs that serve the UE (eg, that the UE has tried).
  • the SMF determines the first indication information based on the DNS query information obtained from the UPF.
  • the method flow shown in Figure 5 also includes:
  • the SMF sends fourth indication information to the UPF, or the UPF receives the fourth indication information from the UPF.
  • the fourth indication information is used to instruct the UPF to cache the DNS query information for the first FQDN from the terminal device that currently needs to perform EAS discovery.
  • the DNS query information from the terminal device for the first FQDN can be understood as the terminal device trying to obtain the edge computing information according to the EAS IP carried in the DNS response message (for example, step S225 shown in Figure 2 above). service, and the result is that the edge computing service cannot be obtained, and the DNS query information is re-initiated.
  • the SMF sends the above-mentioned fourth instruction information to the UPF during the process of inserting the ULCL UPF and the L-PSA UPF (such as step S223 shown in Figure 2 above), and the SMF knows that the first 2. EAS IP address, DNAI and other information.
  • the SMF may send information such as the IP address and the DNAI of the second EAS to the UPF through the fourth indication information.
  • the UPF detects DNS query information, and caches the DNS query information.
  • the UPF receives the DNS query information re-initiated by the UE, and caches the DNS query information.
  • the UPF sends the third report information to the SMF, or the SMF receives the third report information from the UPF.
  • the third report information includes the first FQDN, the IP address of the second EAS, the DNAI, and the like.
  • the third reporting information may also include information such as the IP address and DNAI of the second EAS; or, the SMF
  • the information such as the IP address and DNAI of the second EAS is stored locally, and there is no need for the UPF to report the information such as the IP address and DNAI of the second EAS through the third reporting information.
  • the SMF determines the first indication information based on the third report information.
  • the method flow shown in Figure 5 also includes:
  • the SMF determines the first indication information.
  • the first indication information is used to indicate indication information of an EAS that cannot provide services for the terminal device.
  • the SMF also needs to instruct the UPF to forward the cached DNS query information to the EASDF, and obtain other information (such as the FQDN of the APP, EAS deployment information, UE location, etc.), the other information and
  • the above-mentioned first indication information obtained through the fourth method is used to determine the information for constructing the ECS option, or used to determine the address of the local DNS server, which will be described in conjunction with specific embodiments below, and will not be repeated here.
  • the SMF receives the first indication information from the UE.
  • the method flow shown in Figure 5 also includes:
  • the UE sends the first indication information to the SMF, or the SMF receives the first indication information from the UE,
  • the first indication information is used to indicate the third EAS that cannot serve the UE.
  • the first indication information may indicate that the third EAS cannot provide services
  • the first indication information may indicate that the third EAS cannot be served.
  • the first indication information includes the IP of the third EAS
  • the third EAS is an EAS that cannot provide services for the terminal device currently executing the discovery EAS.
  • the first indication information may also include FQDN, a timer, and the like.
  • the EAS indicated in the DNS Response message received by the terminal device cannot provide edge computing services for the terminal device, and the terminal device will resend the DNS Query message.
  • the terminal device reports the first indication information to the SMF through the NAS message, which includes EAS IP (indicated in the DNS Response), FQDN, timer, etc.
  • the SMF determines the third EAS that cannot provide the edge computing service for the terminal device based on the first indication information.
  • the SMF in mode 5 can also obtain other information (such as the FQDN of the APP, EAS deployment information, UE location, etc.) through the current process (the process shown in Figure 2), the other information and
  • the above-mentioned first indication information obtained through the fifth method is used to determine the information for constructing the ECS option, or used to determine the address of the local DNS server, which will be described in conjunction with specific embodiments below, and will not be repeated here.
  • the ways of determining the first indication information shown in Ways 4 and 5 may be performed after determining the EAS information in any of the ways shown in Ways 1 to 3 above, for example, based on Way 1
  • the EAS that cannot provide the service for the UE may be reported in the manner 4 or 5.
  • the above methods 1 to 3 describe in detail how the SMF obtains EAS information, and methods 4 and 5 describe how the SMF obtains the first indication information.
  • the The method flow also includes:
  • the SMF determines the first information.
  • the SMF determines the first information according to the obtained first indication information or EAS information.
  • the SMF may determine the first information based on at least one of the obtained first indication information and the information of the EAS.
  • the first information is used to determine the information for configuring the ECS option, or the first information is used to determine the address of the local domain name system DNS server.
  • the SMF can use the FQDN of the APP, EAS deployment information, UE location and other information, as well as the obtained first indication information or The information of the EAS determines the first information, and the first information is used to construct the information of the ECS option, or the first information is used to determine the address of the local DNS server.
  • the first information may be information used to determine options for configuring an ECS, or information used to determine an address of a local DNS server.
  • the first information may be DNAI, and the information for configuring the ECS option is determined according to the DNAI, or the local DNS server address is determined according to the DNAI.
  • the first information may be information about ECS options, or a local DNS server address.
  • the information of EAS is provided through AF as shown in the above method 1, so that the determined information of constructing ECS options, or the address of the local DNS server will not correspond to the EAS with too high load or unable to provide services, avoiding the degradation of service quality , or the problem of not being able to obtain edge computing services.
  • the UPF shown in the above method 2 performs data packet detection and message reporting, and the SMF obtains the information of the EAS, so that the determined information for constructing the ECS option, or the address of the local DNS server will not correspond to too high a load, or cannot
  • the EAS that provides services avoids the problem of service quality degradation or inability to obtain edge computing services.
  • the UPF is used for network detection and message reporting, and the SMF obtains the information of the EAS, so that the determined information for constructing the ECS option, or the address of the local DNS server will not correspond to too high a load, or cannot provide
  • the EAS of the service avoids the problem of service quality degradation or inability to obtain edge computing services.
  • the SMF instructs the UPF to cache the DNS Query message and report the data as shown in the fourth method above.
  • the message reported by the UPF to the SMF contains EAS information that cannot provide edge computing services for the UE, so that the SMF determines the information of constructing the ECS option. , or the local DNS server address, avoid the EAS that cannot provide edge computing services.
  • the UE shown in the fifth way above reports the EAS service information to the SMF through the NAS message, which includes the EAS information that cannot provide the edge computing service for the UE, so that when the SMF determines the information for constructing the ECS option or the address of the local DNS server, Avoid the EAS that cannot provide edge computing services.
  • the session management function network element determines the first information according to the obtained first indication information or the information of the edge application server, which can also be understood as the session management function network element at least according to the first indication Information or the information of the edge application server to determine the first information, the session management function network element can also be based on the FQDN of APP shown in Figure 2, EAS deployment information (such as FQDN, IP address, DNAI correspondence), One or more pieces of information in information such as the UE location are integrated to determine the first information.
  • the method SMF for discovering edge application servers determines the information for constructing the ECS option or the address of the local DNS server, it takes into account the EAS used to indicate the selection weight of the EAS, the load status of the EAS, or the service status of the EAS.
  • Information or the first indication information used to indicate the EAS that cannot provide services for the terminal device can avoid the situation that the ECS option information or the edge computing platform corresponding to the local DNS server address or the EAS load is too high, or the EAS upgrade server cannot provide services, etc. , so as to avoid the degradation of the service quality of EAS.
  • an EAS with better service quality can be selected, thereby improving the service quality of the EAS.
  • the method SMF for discovering edge application servers determines the information based on the information for constructing the ECS option or the address of the local DNS server, not only considering the above-mentioned selection weight for indicating the EAS, the load status of the EAS, or the information of the EAS
  • the information of the EAS of the service state or the first indication information for indicating that the EAS that cannot provide services for the terminal device may also include the FQDN of the APP shown in Figure 2 above, and the EAS deployment information (such as FQDN, IP address, DNAI relationship), UE location and other information.
  • Fig. 6 is a schematic flowchart of a method for discovering an edge application server. Include the following steps:
  • the UE initiates a session establishment process.
  • the UE starts an APP to initiate a session establishment procedure or reuses an existing session of the UE to establish a user plane connection between the UE and the UPF.
  • the SMF needs to obtain EAS information from the AF, and the method flow shown in Figure 6 also includes:
  • the AF sends the EAS information to the SMF.
  • the information of the EAS includes the selection weight of the EAS (or the edge computing platform), the load condition of the EAS (or the edge computing platform), the service status of the EAS (or the edge computing platform) and other information.
  • the SMF may send a reply message to the AF to indicate that the EAS information is received.
  • the method flow shown in Figure 6 also includes:
  • the SMF sends reply information to the AF.
  • the AF may proactively send the EAS information to the SMF. For example, provide EAS information to SMF in the process of AF influence on traffic routing.
  • the AF may provide the EAS information to the SMF through the subscription of the SMF.
  • the method flow shown in FIG. 6 also includes:
  • the SMF sends subscription information to the AF.
  • the SMF when the SMF obtains the EAS deployment information, it needs to obtain the corresponding AF information, the SMF obtains the corresponding DNAI according to the FQDN and the location information of the UE, and the SMF subscribes the EAS related information to the AF corresponding to the DNAI.
  • the subscription information may carry information such as FQDN, UE location information, and UE identity. Wherein, information of multiple FQDNs and/or EASs corresponding to multiple UEs may be subscribed to, and the subscription information may carry at least one FQDN, at least one UE location information or at least one UE identifier.
  • the AF may send subscription reply information to the SMF to indicate that the subscription information is received.
  • the method flow shown in Figure 6 also includes:
  • the AF sends subscription reply information to the SMF.
  • the above step S611 is executed, and the AF notifies the SMF of the EAS information, wherein the EAS information includes FQDN, UE identity, EAS (or edge computing platform) load situation, EAS (or edge computing platform) service status wait.
  • the EAS information includes FQDN, UE identity, EAS (or edge computing platform) load situation, EAS (or edge computing platform) service status wait.
  • the AF may provide the EAS information to the SMF through the request of the SMF.
  • the method flow shown in FIG. 6 also includes:
  • the SMF sends request information to the AF.
  • the SMF when obtaining the EAS deployment information, the SMF needs to obtain the corresponding AF information, the SMF obtains the corresponding DNAI according to the FQDN and the location information of the UE, and the SMF requests the EAS related information from the AF corresponding to the DNAI.
  • the request information may carry information such as FQDN, UE location information, and UE identity.
  • the FQDN, UE location information, UE identity and other information are information related to the UE that currently needs to perform EAS discovery.
  • the AF After the AF receives the request information, it executes the above step S611, and the AF replies to the SMF with the EAS information, wherein the EAS information includes FQDN, UE identity, EAS (or edge computing platform) load situation, EAS (or edge computing platform) service status etc.
  • the EAS information includes FQDN, UE identity, EAS (or edge computing platform) load situation, EAS (or edge computing platform) service status etc.
  • the above steps S611, S612, S613 and S614 can be performed in the session establishment process;
  • the way for the SMF to obtain the EAS information from the AF is that the AF actively sends it to the SMF, or in the case of subscription based on the SMF, the above steps S611, S612 and S615 can be performed in the DNS message processing rule update process.
  • the SMF selects EASDF.
  • the SMF interacts with the EASDF to establish DNS message processing rules on the EASDF.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the UE sends DNS query information to the EASDF.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • step S616 to step S621 are the same as the aforementioned step S212 to step S217 in FIG. 2 , and will not be repeated here.
  • the SMF determines according to APP FQDN, EAS deployment information, UE location, selection weight of EAS (or edge computing platform), load condition of EAS (or edge computing platform), service status of EAS (or edge computing platform), etc.
  • ECS option information or local DNS server address the method flow shown in Figure 6 also includes:
  • the SMF determines the first information.
  • the SMF needs to send the information on constructing the ECS option or the address of the local DNS server determined according to the first information to the EASDF, and the method flow shown in FIG. 6 also includes:
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends DNS context update request message (for example, can be Neasdf_DNSContext_Update Request) to EASDF;
  • DNS context update request message for example, can be Neasdf_DNSContext_Update Request
  • the DNS context update request message includes the information for constructing the ECS option or the address of the local DNS server.
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the EASDF sends DNS query information to the DNS server.
  • the EASDF receives the DNS response message sent by the DNS server.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • SMF is inserted into ULCL UPF and L-PSA.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the EASDF sends a DNS response message to the UE.
  • step S624 to step S630 are the same as the above step S219 to step S225 in FIG. 2 , and will not be repeated here.
  • Fig. 7 is a schematic flowchart of another method for discovering an edge application server. Include the following steps:
  • the UE initiates a session establishment procedure.
  • the SMF selects EASDF.
  • the SMF interacts with the EASDF to establish DNS message processing rules on the EASDF.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the UE sends DNS query information to the EASDF.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • step S710 to step S716 are the same as the above step S211 to step S217 in FIG. 2 , and will not be repeated here.
  • the SMF needs to determine the EAS information based on the information obtained from the UPF, and the method flow shown in Figure 7 also includes:
  • the SMF sends second indication information to the UPF.
  • the UPF sends second reply information to the SMF.
  • data packets are transmitted between the UE and the EAS through the UPF.
  • the EAS is the first EAS in the second manner in FIG. 5
  • the data packet is the first data packet in the second manner in FIG. 5 .
  • the UPF sends the first report information to the SMF.
  • the SMF determines the information of at least one EAS according to the first reported information.
  • step S720 to step S722 are the same as the above step S515 to step S517 in FIG. 5 , and will not be repeated here.
  • the SMF determines the information for constructing the ECS option or the local DNS server address according to the APP FQDN, EAS deployment information, UE location, EAS (or edge computing platform) load, EAS (or edge computing platform) service status, etc.
  • the method flow shown in Figure 7 also includes:
  • the SMF determines the first information.
  • step S717 to step S722 are processes performed for other UEs
  • step S723 is a process performed for the UE currently performing EAS discovery.
  • the above steps S717 to S722 may also be executed.
  • the SMF needs to send the information on constructing the ECS option or the address of the local DNS server determined according to the first information to the EASDF, and the method flow shown in FIG. 7 also includes:
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends DNS context update request message (for example, can be Neasdf_DNSContext_Update Request) to EASDF;
  • DNS context update request message for example, can be Neasdf_DNSContext_Update Request
  • the DNS context update request message includes the information for constructing the ECS option or the address of the local DNS server.
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the EASDF sends DNS query information to the DNS server.
  • the EASDF receives the DNS response message sent by the DNS server.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • SMF inserts ULCL UPF and L-PSA.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the EASDF sends a DNS response message to the UE.
  • step S725 to step S731 are the same as the above step S219 to step S225 in FIG. 2 , and will not be repeated here.
  • Fig. 8 is a schematic flowchart of another method for discovering an edge application server. Include the following steps:
  • the UE initiates a session establishment process.
  • the SMF selects EASDF.
  • the SMF interacts with the EASDF to establish DNS message processing rules on the EASDF.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the UE sends DNS query information to the EASDF.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • step S810 to step S816 are the same as the above step S211 to step S217 in FIG. 2 , and will not be repeated here.
  • the SMF needs to determine the EAS information based on the information obtained from the UPF, and the method flow shown in Figure 8 also includes:
  • the SMF sends third indication information to the UPF.
  • the UPF sends third reply information to the SMF.
  • the UPF sends a detection data packet to the EAS.
  • the EAS is the first EAS in Mode 3 in FIG. 5 .
  • the UPF determines the state of the EAS.
  • the UPF sends the second report information to the SMF.
  • the SMF determines the information of at least one EAS according to the second reported information.
  • step S817 to step S822 are the same as the above step S521 to step S526 in FIG. 5 , and will not be repeated here.
  • steps S817 to S822 are processes performed for each EAS.
  • the SMF determines the information for constructing the ECS option or the address of the local DNS server according to the APP FQDN, EAS deployment information, UE location, EAS (or edge computing platform) load, EAS (or edge computing platform) service status, etc.
  • the method flow shown in Figure 8 also includes:
  • the SMF determines the first information.
  • the SMF needs to send the information on constructing the ECS option or the address of the local DNS server determined according to the first information to the EASDF, and the method flow shown in FIG. 8 also includes:
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • SMF sends DNS context update request message (for example, can be Neasdf_DNSContext_Update Request) to EASDF;
  • DNS context update request message for example, can be Neasdf_DNSContext_Update Request
  • the DNS context update request message includes the information for constructing the ECS option or the address of the local DNS server.
  • EASDF sends a DNS context update response message (for example, Neasdf_DNSContext_Update Response) to SMF.
  • a DNS context update response message for example, Neasdf_DNSContext_Update Response
  • the EASDF sends DNS query information to the DNS server.
  • the EASDF receives the DNS response message sent by the DNS server.
  • the EASDF sends a notification request message to the SMF.
  • the SMF sends a notification response message to the EASDF.
  • SMF is inserted into ULCL UPF and L-PSA.
  • the SMF interacts with the EASDF to update the DNS message processing rules on the EASDF.
  • the EASDF sends a DNS response message to the UE.
  • step S825 to step S831 are the same as the above step S219 to step S225 in FIG. 2 , and will not be repeated here.
  • Fig. 9 is a schematic flowchart of another method for discovering an edge application server.
  • the method for discovering an edge application server is based on the process shown in Figure 2, and the following modifications are made on the process shown in Figure 2:
  • step S223 in the process shown in FIG. 2 the UPF is instructed to cache the DNS query information for the first FQDN from the terminal device that currently needs to perform EAS discovery. Steps before step S223 in FIG. 2 will not be described in detail.
  • the method flow shown in Figure 9 includes the following steps:
  • the SMF sends fourth indication information to the UPF.
  • the UE determines that the edge computing service corresponding to the second EAS cannot be obtained.
  • the UE tries to obtain the edge computing service according to the EAS IP in the DNS Response, but fails to obtain the edge computing service corresponding to the EAS.
  • the UE re-initiates DNS query information.
  • the UPF detects DNS query information, and caches the DNS query information.
  • the UPF sends third reporting information to the SMF.
  • the SMF sends seventh indication information to the EASDF.
  • the seventh indication information is used to instruct the EASDF to report the DNS query information whose original IP address is the UE IP address and whose query domain name is the first FQDN to the SMF.
  • SMF updates the DNS message handling rule in EASDF through the Neasdf_DNSContext_Update service, instructing EASDF to perform the above operations.
  • the SMF sends eighth indication information to the UPF.
  • the eighth indication information is used to instruct the UPF to forward the cached DNS query information to the EASDF.
  • the UPF sends DNS query information to the EASDF.
  • the EASDF sends the DNS query information to the SMF, or the SMF receives the DNS query information from the EASDF.
  • the DNS query information may be part or all of the above DNS query information.
  • EASDF reports DNS query information to SMF through Neasdf_DNSContext_Notify according to DNS message handling rule.
  • the SMF determines the first indication information.
  • the SMF determines the information for constructing the ECS option or local DNS server address, the method process shown in Figure 9 also includes:
  • the SMF determines first information.
  • the SMF needs to send the information on constructing the ECS option or the address of the local DNS server determined according to the first information to the EASDF.
  • the method flow shown in FIG. 9 also includes the subsequent DNS query processing flow, which is the same as step S218 in FIG. Go to step S225, which will not be repeated here.
  • Fig. 10 is a schematic flowchart of another method for discovering an edge application server.
  • the method for discovering an edge application server is based on the process shown in Figure 2, and the following modifications are made on the process shown in Figure 2:
  • the UE determines that the edge computing service corresponding to the second EAS cannot be obtained.
  • the UE tries to obtain the edge computing service according to the EAS IP in the DNS Response, but fails to obtain the edge computing service corresponding to the EAS.
  • the UE sends first indication information to the SMF.
  • the SMF sends seventh indication information to the EASDF.
  • the seventh instruction information is used to instruct the EASDF to report the DNS query information whose original IP address is the UE IP address and whose query domain name is the first FQDN to the SMF.
  • SMF updates the DNS message handling rule in EASDF through the Neasdf_DNSContext_Update service, instructing EASDF to perform the above operations.
  • the SMF may send the first reply information to the UE, and the method flow shown in FIG. 5 further includes:
  • the SMF sends the first reply information to the UE, or the UE receives the first reply information from the SMF.
  • the SMF sends the first reply information to the UE through a NAS message.
  • the first reply information indicates that the UE can re-initiate the DNS query.
  • the SMF may not send the above first reply information after receiving the above first indication information, and the UE may directly re-initiate the DNS query.
  • the UE resends the DNS query information.
  • the EASDF sends the DNS query information to the SMF, or the SMF receives the DNS query information from the EASDF.
  • the DNS query information may be part or all of the above DNS query information.
  • EASDF reports DNS query information to SMF through Neasdf_DNSContext_Notify according to DNS message handling rule.
  • the SMF determines the third EAS.
  • the SMF determines the information for constructing the ECS option or the address of the local DNS server according to the APP FQDN, EAS deployment information, UE location, UE reported information (FQDN, EAS IP, DNAI, etc.), and the method flow shown in Figure 10 is further include:
  • the SMF determines the first information.
  • the SMF needs to send the information on constructing the ECS option or the address of the local DNS server determined according to the first information to the EASDF.
  • the method flow shown in FIG. 10 also includes the subsequent DNS query processing flow, which is the same as step S218 in FIG. Go to step S225, which will not be repeated here.
  • sequence numbers of the above processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.
  • the network elements in the existing network architecture are mainly used as examples for illustration (such as AF, UPF, SMF, etc.), and it should be understood that the specific form of the network element
  • the application examples are not limited. For example, network elements that can implement the same function in the future are applicable to this embodiment of the application.
  • the methods and operations implemented by network equipment may also be implemented by components (such as chips or circuits) that can be used in network equipment.
  • a PDU session is taken as an example of a PDU session
  • the "user equipment” in this application is taken as an example to describe each method.
  • a PDU session is also It can be replaced by other sessions, and the UE can also be replaced by other user equipment, which is not limited in this application.
  • each network element includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.
  • the embodiment of the present application can divide the functional modules of the transmitting end device or the receiving end device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module middle.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In the following, description will be made by taking the division of each functional module corresponding to each function as an example.
  • Fig. 11 is a schematic block diagram of an apparatus 1100 provided by an embodiment of the present application.
  • the device 1100 includes a transceiver unit 1110 and a processing unit 1120 .
  • the transceiver unit 1110 can implement a corresponding communication function, and the processing unit 1120 is used for data processing.
  • the transceiver unit 1110 may also be called a communication interface or a communication unit.
  • the device 1100 may further include a storage unit, which may be used to store instructions and/or data, and the processing unit 1120 may read the instructions and/or data in the storage unit, so that the device implements the aforementioned method embodiments .
  • a storage unit which may be used to store instructions and/or data
  • the processing unit 1120 may read the instructions and/or data in the storage unit, so that the device implements the aforementioned method embodiments .
  • the apparatus 1100 can be used to execute the actions performed by the network equipment (such as each network element) in the above method embodiments.
  • the apparatus 1100 can be a network equipment or a component that can be configured in the network equipment.
  • the transceiver unit 1110 is used to To perform operations related to sending and receiving on the network device side in the method embodiments above
  • the processing unit 1120 is configured to perform operations related to processing on the network device side in the method embodiments above.
  • the apparatus 1100 is configured to perform the actions performed by the session management function network element in the above method embodiments.
  • the transceiver unit 1110 is configured to obtain the first indication information or the information of at least one edge application server (EAS), where the session management function network element is a network element that provides services for the session of the terminal device, and the EAS The information is used to indicate at least one of the selection weight of the EAS, the load status of the EAS, or the service status of the EAS, and the first indication information is used to indicate the EAS that cannot provide services for the terminal device;
  • EAS edge application server
  • the processing unit 1120 is configured to determine first information according to the EAS information or the first indication information, the first information is used to determine the information of the client subnet ECS option of the domain name system extension mechanism, or the first information is used for local
  • the domain name system DNS server address is determined, the ECS option information or the local DNS server address is used to determine the EAS that provides services for the terminal device.
  • processing unit 1120 is configured to obtain the first indication information or the information of at least one edge application server EAS;
  • the processing unit 1120 is configured to determine first information according to the EAS information or the first indication information.
  • the apparatus 1100 can implement the steps or processes corresponding to the execution of the session management function network element in the method embodiment according to the embodiment of the present application, and the apparatus 1100 can include a method for executing the session management function network element in the method embodiment unit. Moreover, each unit in the apparatus 1100 and other operations and/or functions mentioned above are respectively for realizing the corresponding process of the method embodiment in the session management function network element in the method embodiment.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S512, S511, S513, S514, S516, S518, S520, S521, S522, S525, S527, S529, S530, S532, and S534; the processing unit 1120 may be used to execute processing steps in the method, such as steps S517, S526, S533, and S535.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S613, S614, S615, S611, S612, S617, S618, S620, S621, S623, S626, S627 and S629; the processing unit 1120 can be used to execute processing steps in the method, such as steps S616, S622 and S628.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S712, S713, S715, S716, S717, S718, S721, S724, S727, S728 and S730;
  • the processing unit 1120 can be used to execute processing steps in the method, such as steps S711, S722, S723 and S729.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S812, S813, S815, S816, S817, S818, S821, S824, S827, S828 and S830;
  • the processing unit 1120 can be used to execute processing steps in the method, such as steps S811, S822, S823 and S829.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S910, S914, S915, S916 and S918; the processing unit 1120 can be used to execute the processing steps in the method, Such as steps S919 and S920.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S1011, S1013, S1012 and S1015; the processing unit 1120 can be used to execute the processing steps in the method, such as steps S1016 and S1017.
  • the apparatus 1100 is configured to perform the actions performed by the application function network element in the above method embodiments.
  • the processing unit 1120 is configured to determine information about at least one edge application server EAS or information about at least one edge computing platform,
  • the information of the at least one edge computing platform is used to indicate the information of the at least one EAS, the at least one EAS is deployed in the at least one edge computing platform, the information of the EAS is used to indicate the selection weight of the EAS, the selection weight of the EAS At least one of the load state or the service state of the EAS;
  • the transceiver unit 1110 is configured to send the information of the at least one EAS to the session management function network element.
  • the apparatus 1100 can implement the steps or processes corresponding to the execution of the application function network element in the method embodiment according to the embodiment of the present application, and the apparatus 1100 can include a unit for executing the method executed by the application function network element in the method embodiment .
  • each unit in the apparatus 1100 and other operations and/or functions described above are respectively intended to implement the corresponding procedures of the method embodiment in the application function network element in the method embodiment.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S512 and S511 ; the processing unit 1120 can be used to execute the processing steps in the method.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S613 , S614 , S615 , S611 and S612 .
  • the apparatus 1100 is configured to perform the actions performed by the user plane functional network element in the above method embodiments.
  • the transceiver unit 1110 is configured to receive second indication information from a session management function network element, where the second indication information is used to instruct the user plane function network element to detect the first data packet, and the second indication information is to instruct the user plane function network element to detect the first data packet, and the first The destination IP address of a data packet is the IP address of the first edge application server EAS;
  • the processing unit 1120 is configured to detect the first data packet, and obtain a detection result of the first data packet, where the detection result includes traffic information of the first EAS and/or the user interface of the first data packet transmission delay information between the functional network element and the first EAS;
  • the transceiver unit 1110 is configured to send first report information to the session management function network element, the first report information includes the detection result of the first data packet, and the first report information is used to determine the information of the first EAS , the information of the first EAS is used to indicate the load status of the first EAS, and/or is used to indicate the service status of the first EAS.
  • the transceiver unit 1110 is configured to receive third indication information from the session management function network element, where the third indication information is used to instruct the user plane function network element to perform network detection to determine the first edge application server the status of the EAS;
  • a transceiver unit 1110 configured to send a detection data packet to the first EAS
  • a processing unit 1120 configured to determine the state of the first EAS according to the response of the first EAS to the detection data packet;
  • the transceiver unit 1110 is configured to send second report information to the session management function network element, the second report information includes indication information of the state of the first EAS, and the second report information is used for information of the first EAS It is determined that the information of the first EAS is used to indicate the load status of the first EAS, and/or is used to indicate the service status of the first EAS.
  • the transceiver unit 1110 is configured to receive fourth indication information from the session management function network element, where the fourth indication information is used to instruct the user plane function network element to cache the information from the terminal device for the first DNS query information of fully qualified domain name FQDN;
  • a processing unit 1120 configured to cache the DNS query information
  • the transceiver unit 1110 is configured to send third reporting information to the session management function network element, the third reporting information includes the first FQDN, the third reporting information is used to determine the first indication information, and the first indication information Indicates a second EAS that cannot serve the terminal device.
  • the apparatus 1100 can implement the steps or processes corresponding to the execution of the user plane function network element in the method embodiment according to the embodiment of the present application, and the apparatus 1100 can include a method for executing the user plane function network element in the method embodiment unit.
  • each unit in the apparatus 1100 and other operations and/or functions described above are respectively intended to implement a corresponding flow of the method embodiment in the user plane functional network element in the method embodiment.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S513, S514, S516, S521, S522, S525, S530 and S532; the processing unit 1120 can be used For executing the processing steps in the method, such as steps S515, S524 and S531.
  • the transceiving unit 1110 can be used to execute the transceiving steps in the method, such as steps S717, S718 and S721; the processing unit 1120 can be used to execute the processing steps in the method, such as step S720.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S817, S818, S819 and S821; the processing unit 1120 can be used to execute the processing steps in the method, such as step S820.
  • the transceiving unit 1110 can be used to perform the transceiving steps in the method, such as steps S910, S914, and S916; the processing unit 1120 can be used to perform the processing steps in the method, such as step S913.
  • the device 1100 is configured to perform the actions performed by the terminal device in the above method embodiments.
  • the processing unit 1120 is configured to determine first indication information, where the first indication information is used to indicate a third EAS that cannot provide services for the terminal device;
  • the transceiving unit 1110 is configured to send the first indication information to the session management function network element.
  • the apparatus 1100 may implement the steps or processes corresponding to the execution of the terminal apparatus in the method embodiment according to the embodiment of the present application, and the apparatus 1100 may include a unit for executing the method executed by the terminal apparatus in the method embodiment.
  • each unit in the device 1100 and other operations and/or functions described above are respectively for realizing the corresponding process of the method embodiment in the terminal device in the method embodiment.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as step S534 ; the processing unit 1120 can be used to execute the processing steps in the method.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S619 and S630.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S714 and S731.
  • the transceiver unit 1110 can be used to execute the transceiver steps in the method, such as steps S814 and S831.
  • the transceiving unit 1110 can be used to execute the transceiving steps in the method, such as step S912.
  • the transceiving unit 1110 can be used to perform the transceiving steps in the method, such as steps S1011, S1013 and S1014; the processing unit 1120 can be used to perform the processing steps in the method, such as step S1010.
  • the processing unit 1120 in the above embodiments may be implemented by at least one processor or processor-related circuits.
  • the transceiver unit 1110 may be implemented by a transceiver or transceiver-related circuits.
  • the storage unit can be realized by at least one memory.
  • the embodiment of the present application further provides an apparatus 1200 .
  • the apparatus 1200 includes a processor 1210 and may further include one or more memories 1220 .
  • the processor 1210 is coupled with the memory 1220, and the memory 1220 is used to store computer programs or instructions and/or data, and the processor 1210 is used to execute the computer programs or instructions and/or data stored in the memory 1220, so that the methods in the above method embodiments be executed.
  • the apparatus 1200 includes one or more processors 1210 .
  • the memory 1220 may be integrated with the processor 1210, or set separately.
  • the apparatus 1200 may further include a transceiver 1230, and the transceiver 1230 is used for receiving and/or sending signals.
  • the processor 1210 is configured to control the transceiver 1230 to receive and/or send signals.
  • the apparatus 1200 is used to implement the operations performed by the network equipment (such as the above-mentioned network elements) in the above method embodiments.
  • the embodiment of the present application also provides an apparatus 1300, and the apparatus 1300 may be a network device or a chip.
  • the apparatus 1300 may be used to execute the operations performed by the network equipment (such as the above-mentioned network elements) in the foregoing method embodiments.
  • Fig. 13 shows a simplified structural schematic diagram.
  • Apparatus 1300 includes part 1310 and part 1320 .
  • Part 1310 is mainly used for transmitting and receiving radio frequency signals and conversion between radio frequency signals and baseband signals; part 1320 is mainly used for baseband processing and controlling base stations.
  • Part 1310 may generally be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver.
  • the part 1320 is generally the control center of the base station, which can generally be referred to as a processing unit, and is used to control the base station to perform processing operations on the receiving end device side in the foregoing method embodiments.
  • the transceiver unit in part 1310 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing.
  • the device used to realize the receiving function in part 1310 can be regarded as a receiving unit
  • the device used to realize the sending function can be regarded as a sending unit, that is, part 1310 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, receiver, or receiving circuit, etc.
  • the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.
  • Section 1320 may include one or more single boards, each single board may include one or more processors and one or more memories.
  • the processor is used to read and execute programs in the memory to realize baseband processing functions and control the base station. If there are multiple single boards, each single board can be interconnected to enhance the processing capability. As an optional implementation, it is also possible that multiple boards share one or more processors, or that multiple boards share one or more memories, or that multiple boards share one or more processors at the same time. device.
  • FIG. 13 is only an example rather than a limitation, and the foregoing network device including a transceiver unit and a processing unit may not depend on the structure shown in FIG. 13 .
  • the chip When the device 1300 is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input-output circuit or a communication interface;
  • the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.
  • the apparatus 1300 may also be a system-on-a-chip or a processing system, so that a device installed with the apparatus 1300 can implement the methods and functions of the embodiments of the present application.
  • the processing unit 1320 can be a processing circuit in a chip system or a processing system, which realizes the control of the device installed with the chip system or processing system, and can also be coupled to the link storage unit to call the instructions in the storage unit, so that the device can realize
  • the transceiver unit 1310 can be an input and output circuit in a chip system or a processing system, outputting information processed by the chip system, or inputting data or signaling information to be processed into the chip system for processing .
  • the embodiment of the present application also provides a computer-readable storage medium, on which computer instructions for implementing the method executed by the network device (such as each network element) in the above method embodiment are stored.
  • the computer program when executed by a computer, the computer can implement the method performed by the network device in the foregoing method embodiments.
  • the embodiment of the present application also provides a computer program product including instructions, and when the instructions are executed by a computer, the computer implements the method performed by the network device (such as each network element) in the above method embodiments.
  • the embodiment of the present application also provides a communication system, the communication system includes the network device (such as each network element) in the above embodiments, such as SMF and AF.
  • the network device such as each network element in the above embodiments, such as SMF and AF.
  • processors mentioned in the embodiment of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits ( application specific integrated circuit (ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory and/or a nonvolatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM).
  • RAM random access memory
  • RAM can be used as an external cache.
  • RAM may include the following forms: static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM) , double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and Direct memory bus random access memory (direct rambus RAM, DR RAM).
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM synchronous DRAM
  • double data rate SDRAM double data rate SDRAM
  • DDR SDRAM double data rate SDRAM
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous connection dynamic random access memory
  • Direct memory bus random access memory direct rambus RAM, DR RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components
  • the memory storage module may be integrated in the processor.
  • memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.
  • the disclosed devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to implement the solutions provided in this application.
  • each functional unit in each embodiment of the present application may be integrated into one unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer may be a personal computer, a server, or a network device.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) etc.
  • the aforementioned available medium may include But not limited to: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program codes.

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Abstract

本申请提供了一种用于发现边缘应用服务器的方法和装置，该方法包括：为终端装置的会话提供服务的会话管理功能网元获得至少一个边缘应用服务器EAS的信息，或者获得无法为该终端装置提供服务的EAS的指示信息，该会话管理功能网元根据获得的信息确定第一信息，该第一信息用于ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。通过在考虑EAS的信息或无法为该终端装置提供服务的EAS的情况下确定第一信息，避免EAS的服务质量下降。

Description

发现边缘应用服务器的方法及装置
本申请要求于2021年08月05日提交中国专利局、申请号为202110896677.8、申请名称为“发现边缘应用服务器的方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，并且更具体地，涉及一种发现边缘应用服务器的方法及装置。
背景技术
在一些通信系统中，如第五代(5th generation，5G)通信系统中，边缘计算中边缘应用服务器(edge application server，EAS)的发现可以通过域名系统(domain name system，DNS)技术实现，具体包括：边缘计算中引入边缘应用服务器发现功能(edge application server discovery function，EASDF)网元，该EASDF网元包括如下至少一个功能：接收会话管理功能(session management function，SMF)网元发送的DNS消息处理规则、将DNS消息发送至本地DNS服务器(DNS server)或中心DNS server、为DNS查询信息添加DNS扩展机制的客户端子网(extension mechanisms for DNS client subnet，ECS)选项。
通过ECS选项，DNS server可以返回与ECS选项相匹配的EAS互联网协议(internet protocol，IP)地址，但是SMF在确定发送给EASDF的构造ECS选项的信息时，可能会发生确定的ECS选项对应的EAS负载过高，或者EAS升级服务器无法提供服务等情况，使得EAS的服务质量下降。
发明内容
本申请提供一种发现边缘应用服务器的方法，能够提高EAS的服务质量。
第一方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由会话管理功能网元执行，或者，也可以由具有会话管理功能的网元中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由会话管理功能网元执行为例进行说明。
该方法包括：
会话管理功能网元获得第一指示信息或至少一个边缘应用服务器EAS的信息，其中，该会话管理功能网元是为终端装置的会话提供服务的网元，该EAS的该信息用于指示该EAS的选择权重、该EAS的负载状态或该EAS的服务状态中的至少一种，该第一指示信息用于指示无法为该终端装置提供服务的EAS；该会话管理功能网元根据获得的该EAS的该信息或该第一指示信息确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，通过在考虑EAS的相关信息或无法为该终端装置提供服务的EAS 的情况下，确定用于构造ECS选项的信息，或者用于确定本地DNS服务器地址的信息，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况，从而避免EAS的服务质量下降。
另外，在考虑了多个EAS的状态，或负载的情况下，可以选取服务质量更好的EAS，从而能够提高EAS的服务质量。
结合第一方面，在第一方面的某些实现方式中，该会话管理功能网元获得至少一个EAS的信息包括：该会话管理功能网元接收来自应用功能网元的该至少一个EAS的信息。
结合第一方面，在第一方面的某些实现方式中，至少一个EAS的信息包括：至少一个边缘计算平台的信息，该至少一个边缘计算平台的信息用于指示该至少一个EAS的信息，其中，该至少一个边缘计算平台中部署有该至少一个EAS。
基于上述技术方案，会话管理功能网元可以从应用功能网元接收到EAS的信息或用于确定EAS的信息的边缘计算平台的信息，也就是说会话管理功能网元可以基于边缘计算平台的信息间接确定该边缘计算平台中部署的EAS的信息，增加方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该会话管理功能网元向该应用功能网元发送订阅信息或请求信息，该订阅信息或请求信息用于获得该至少一个EAS的信息。
基于上述技术方案，应用功能网元可以主动执行下发上述的至少一个EAS的信息，也可以基于会话管理功能网元订阅或者请求下发上述的至少一个EAS的信息，提供了应用功能网元下发信息的不同的触发方式，增加方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该会话管理功能网元向用户面功能网元发送第二指示信息，该第二指示信息用于指示该用户面功能网元对第一数据包进行检测，该第一数据包的目的IP地址为第一EAS的IP地址；该会话管理功能网元接收来自该用户面功能网元的第一上报信息，该第一上报信息中包括该第一数据包的检测结果，该检测结果中包括该第一EAS的访问量信息和/或该第一数据包在该用户面功能网元和该第一EAS之间的传输时延信息；其中，该第一EAS为该至少一个EAS中的任意一个。
结合第一方面，在第一方面的某些实现方式中，该会话管理功能网元获得至少一个EAS的信息，包括：该会话管理功能网元根据该第一上报信息确定该第一EAS的信息；或者，该会话管理功能网元向网络数据分析功能网元发送该第一上报信息，该第一上报信息用于该第一EAS的信息的确定；该会话管理功能网元接收来自该网络数据分析功能网元的该第一EAS的信息。
基于上述技术方案，会话管理功能网元可以直接根据用户面功能网元上报的数据包检测结果确定EAS的信息，还可以将用户面功能网元上报的数据包检测结果发送给网络数据分析功能网元，由网络数据分析功能网元进行数据分析得到EAS的信息再发送给会话管理功能网元，提供了不同的确定EAS的信息的方式，增加方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该会话管理功能网元向用户面功能网元发送第三指示信息，该第三指示信息用于指示该用户面功能网元确定第一EAS的状态；该会话管理功能网元接收来自该用户面功能网元的第二上报信息，该第二上报信息中包括该第一EAS的状态的指示信息，其中，该第一EAS为该至少一个EAS 中的任意一个。
结合第一方面，在第一方面的某些实现方式中，该会话管理功能网元获得至少一个EAS的信息，包括：该会话管理功能网元根据该第二上报信息确定该第一EAS的信息；或者，该会话管理功能网元向网络数据分析功能网元发送该第二上报信息，该第二上报信息用于确定该第一EAS的信息；该会话管理功能网元接收来自该网络数据分析功能网元的该第一EAS的信息。
基于上述技术方案，会话管理功能网元可以直接根据用户面功能网元上报的网络探测结果确定EAS的信息，还可以将用户面功能网元上报的网络探测结果发送给网络数据分析功能网元，由网络数据分析功能网元进行数据分析得到EAS的信息再发送给会话管理功能网元，提供了不同的确定EAS的信息的方式，增加方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该会话管理功能网元向用户面功能网元发送第四指示信息，该第四指示信息用于指示该UPF缓存来自该终端装置的针对第一全限定域名FQDN的DNS查询信息；该会话管理功能网元接收来自该用户面功能网元的第三上报信息，该第三上报信息中包括该第一FQDN；该会话管理功能网元获得第一指示信息，包括：该会话管理功能网元根据该第三上报信息确定第一指示信息，其中，该第一指示信息指示无法为该终端装置提供服务的第二EAS。
结合第一方面，在第一方面的某些实现方式中，该会话管理功能网元获得第一指示信息，包括：该会话管理功能网元接收来自该终端装置的第一指示信息，该第一指示信息用于指示无法为该终端装置提供服务的第三EAS。
基于上述技术方案，会话管理功能网元可以根据用户面功能网元上报的DNS查询信息相关的信息确定不能为终端装置提供服务的EAS，也可以根据终端装置上报的信息确定不能为终端装置提供服务的EAS，提供了不同的确定不能为终端装置提供服务的EAS的方式，增加方案的灵活性。
结合第一方面，在第一方面的某些实现方式中，该方法还包括：该会话管理功能网元向边缘应用服务器发现功能网元发送该用于确定ECS选项的信息或该本地DNS服务器地址。
基于上述技术方案，会话管理功能网元可以将上述的构造ECS选项的信息或该本地DNS服务器地址发送给边缘应用服务器发现功能网元，避免确定的ECS选项对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况。
第二方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由应用功能网元执行，或者，也可以由具有应用功能的网元中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由应用功能网元执行为例进行说明。
该方法包括：
应用功能网元确定至少一个边缘应用服务器EAS的信息，其中，该EAS的该信息用于指示该EAS的选择权重、该EAS的负载或该EAS的服务状态中的至少一种；该应用功能网元向会话管理功能网元发送该至少一个EAS的信息，该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，会话管理功能网元可以从应用功能网元接收到EAS的信息，通过在考虑EAS的相关信息的情况下，确定用于构造ECS选项的信息，或者确定本地DNS服务器地址，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况，从而避免EAS的服务质量下降。
结合第二方面，在第二方面的某些实现方式中，至少一个EAS的信息包括：至少一个边缘计算平台的信息，该至少一个边缘计算平台的信息用于指示该至少一个EAS的信息，其中，该至少一个边缘计算平台中部署有该至少一个EAS。
基于上述技术方案，会话管理功能网元可以从应用功能网元接收到EAS的信息或用于确定EAS的信息的边缘计算平台的信息，也就是说会话管理功能网元可以基于边缘计算平台的信息间接确定该边缘计算平台中部署的EAS的信息，增加方案的灵活性。
结合第二方面，在第二方面的某些实现方式中，该方法还包括：该应用功能网元接收来自该会话管理功能网元的订阅信息或请求信息，该订阅信息或请求信息用于获得该至少一个EAS的信息。
基于上述技术方案，应用功能网元可以主动执行下发上述的至少一个EAS的信息，也可以基于会话管理功能网元订阅或者请求下发上述的至少一个EAS的信息，提供了应用功能网元下发信息的不同的触发方式，增加方案的灵活性。
第三方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由用户面功能网元执行，或者，也可以由具有用户面功能的网元中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由用户面功能网元执行为例进行说明。
该方法包括：
用户面功能网元接收来自会话管理功能网元的第二指示信息，该第二指示信息用于指示该用户面功能网元对第一数据包进行检测，该第一数据包的目的互联网协议IP地址为第一边缘应用服务器EAS的IP地址；该用户面功能网元对该第一数据包进行检测，获得该第一数据包的检测结果，该检测结果中包括该第一EAS的访问量信息和/或该第一数据包在该用户面功能网元和该第一EAS之间的传输时延信息；该用户面功能网元向该会话管理功能网元发送第一上报信息，该第一上报信息中包括该第一数据包的检测结果，该第一上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态；该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，会话管理功能网元可以根据用户面功能网元上报的数据包检测结果确定EAS的信息，通过在考虑EAS的负载状态、EAS的服务状态情况下，确定用于构造ECS选项的信息，或者确定本地DNS服务器地址的信息，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况，从而避免EAS的服务质量下降。
第四方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由用户面功能网元执行，或者，也可以由具有用户面功能的网元中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由用户面功能网元执行为例进行说明。
该方法包括：
用户面功能网元接收来自会话管理功能网元的第三指示信息，该第三指示信息用于指示该用户面功能网元确定第一边缘应用服务器EAS的状态；该用户面功能网元向该第一EAS发送侦测数据包；该用户面功能网元根据该第一EAS对于该侦测数据包的响应，确定该第一EAS的状态；该用户面功能网元向该会话管理功能网元发送第二上报信息，该第二上报信息中包括该第一EAS的状态的指示信息，该第二上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态；该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，会话管理功能网元可以根据用户面功能网元上报的网络探测结果确定EAS的信息，通过在考虑EAS的负载状态、EAS的服务状态情况下，确定用于构造ECS选项的信息，或者确定本地DNS服务器地址的信息，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况，从而避免EAS的服务质量下降。
第五方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由用户面功能网元执行，或者，也可以由具有用户面功能的网元中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由用户面功能网元执行为例进行说明。
该方法包括：
用户面功能网元接收来自会话管理功能网元的第四指示信息，该第四指示信息用于指示该用户面功能网元缓存来自该终端装置的针对第一全限定域名FQDN的DNS查询信息；该用户面功能网元缓存该DNS查询信息；该用户面功能网元向该会话管理功能网元发送第三上报信息，该第三上报信息中包括该第一FQDN，该第三上报信息用于第一指示信息的确定，该第一指示信息指示无法为该终端装置提供服务的第二EAS；该第一指示信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，会话管理功能网元可以根据用户面功能网元上报的信息确定无法为终端装置提供服务的EAS息，通过在考虑无法为该终端装置提供服务的EAS的情况下，确定用于构造ECS选项的信息，或者确定本地DNS服务器地址的信息，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS无法提供服务，从而避免EAS的服务质量下降。
第六方面，提供了一种用于发现边缘应用服务器的方法，该方法可以由终端装置执行，或者，也可以由终端装置中的芯片、芯片系统或电路执行，本申请对此不作限定。为了便于描述，下面以由终端装置执行为例进行说明。
该方法包括：
终端装置确定第一指示信息，该第一指示信息用于指示无法为该终端装置提供服务的第三EAS；该终端装置向会话管理功能网元发送该第一指示信息；该第一指示信息用于确 定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
基于上述技术方案，会话管理功能网元可以根据终端装置上报的信息确定无法为终端装置提供服务的EAS息，通过在考虑无法为该终端装置提供服务的EAS的情况下，确定用于构造ECS选项的信息，或者确定本地DNS服务器地址的信息，避免ECS选项或本地DNS服务器地址对应的边缘计算平台或EAS无法提供服务，从而避免EAS的服务质量下降。
第七方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第一方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
获得单元，用于获得第一指示信息或至少一个边缘应用服务器EAS的信息，其中，该装置是为终端装置的会话提供服务的网元，该EAS的息用于指示该EEAS的选择权重、该EAS的负载状态或该EAS的服务状态中的至少一种，该第一指示信息用于指示无法为该终端装置提供服务的EAS；
处理单元，用于根据获得的该EAS的信息或该第一指示信息确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
结合第七方面，在第七方面的某些实现方式中，该获得单元为接收单元，该获得单元获得至少一个EAS的信息包括：该接收单元接收来自应用功能网元的该至少一个EAS的信息。
结合第七方面，在第七方面的某些实现方式中，该至少一个EAS的信息包括：至少一个边缘计算平台的信息，该至少一个边缘计算平台的信息用于指示该至少一个EAS的信息，其中，该至少一个边缘计算平台中部署有该至少一个EAS。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：发送单元，用于向该应用功能网元发送订阅信息或请求信息，该订阅信息或请求信息用于获得该至少一个EAS的信息。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：发送单元，用于向用户面功能网元发送第二指示信息，该第二指示信息用于指示该用户面功能网元对第一数据包进行检测，该第一数据包的目的IP地址为第一EAS的IP地址；接收单元，用于接收来自该用户面功能网元的第一上报信息，该第一上报信息中包括该第一数据包的检测结果，该检测结果中包括该第一EAS的访问量信息和/或该第一数据包在该用户面功能网元和该第一EAS之间的传输时延信息；其中，该第一EAS为该至少一个EAS中的任意一个。
结合第七方面，在第七方面的某些实现方式中，该获得单元获得至少一个EAS的信息，包括：该处理单元根据该第一上报信息确定该第一EAS的信息；或者，该发送单元向网络数据分析功能网元发送该第一上报信息，该第一上报信息用于该第一EAS的信息的确定；该接收单元接收来自该网络数据分析功能网元的该第一EAS的信息。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：发送单元，用于向用户面功能网元发送第三指示信息，该第三指示信息用于指示该用户面功能网元确定第一 EAS的状态；接收单元，用于接收来自该用户面功能网元的第二上报信息，该第二上报信息中包括该第一EAS的状态的指示信息，其中，该第一EAS为该至少一个EAS中的任意一个。
结合第七方面，在第七方面的某些实现方式中，该获得单元获得至少一个EAS的信息，包括：该处理单元根据该第二上报信息确定该第一EAS的信息；或者，该发送单元向网络数据分析功能网元发送该第二上报信息，该第二上报信息用于确定该第一EAS的信息；该接收单元接收来自该网络数据分析功能网元的该第一EAS的信息。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：发送单元，用于向用户面功能网元发送第四指示信息，该第四指示信息用于指示该UPF缓存来自该终端装置的针对第一全限定域名FQDN的DNS查询信息；接收单元，用于接收来自该用户面功能网元的第三上报信息，该第三上报信息中包括该第一FQDN；该获得单元为处理单元，该获得单元获得第一指示信息，包括：该处理单元根据该第三上报信息确定第一指示信息，其中，该第一指示信息指示无法为该终端装置提供服务的第二EAS。
结合第七方面，在第七方面的某些实现方式中，该获得单元为接收单元，该获得单元获得第一指示信息，包括：该接收单元接收来自该终端装置的第一指示信息，该第一指示信息用于指示无法为该终端装置提供服务的第三EAS。
结合第七方面，在第七方面的某些实现方式中，该装置还包括：发送单元，用于向边缘应用服务器发现功能网元发送该用于确定ECS选项的信息或该本地DNS服务器地址。
第八方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第二方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
处理单元，用于确定至少一个边缘应用服务器EAS的信息或至少一个边缘计算平台的信息，其中，该至少一个边缘计算平台的信息用于指示该至少一个EAS的信息，该至少一个边缘计算平台中部署有该至少一个EAS，该EAS的信息用于指示该EAS的选择权重、该EAS的负载状态或该EAS的服务状态中的至少一种；
发送单元，用于向会话管理功能网元发送该至少一个EAS的信息，该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
结合第八方面，在第八方面的某些实现方式中，该装置还包括：接收单元，用于接收来自该会话管理功能网元的订阅信息或请求信息，该订阅信息或请求信息用于获得该至少一个EAS的信息。
第九方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第三方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
接收单元，用于接收来自会话管理功能网元的第二指示信息，该第二指示信息用于指示该装置对第一数据包进行检测，该第一数据包的目的互联网协议IP地址为第一边缘应用服务器EAS的IP地址；
处理单元，用于对该第一数据包进行检测，获得该第一数据包的检测结果，该检测结果中包括该第一EAS的访问量信息和/或该第一数据包在该装置和该第一EAS之间的传输时延信息；
发送单元，用于向该会话管理功能网元发送第一上报信息，该第一上报信息中包括该第一数据包的检测结果，该第一上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态；该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
第十方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第四方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
接收单元，用于接收来自会话管理功能网元的第三指示信息，该第三指示信息用于指示该装置确定第一边缘应用服务器EAS的状态；
发送单元，用于向该第一EAS发送侦测数据包；
处理单元，用于根据该第一EAS对于该侦测数据包的响应，确定该第一EAS的状态；
该发送单元，用于向该会话管理功能网元发送第二上报信息，该第二上报信息中包括该第一EAS的状态的指示信息，该第二上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态；该EAS的信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
第十一方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第五方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
接收单元，用于接收来自会话管理功能网元的第四指示信息，该第四指示信息用于指示该装置，缓存来自该终端装置的针对第一全限定域名FQDN的DNS查询信息；
处理单元，用于缓存该DNS查询信息；
发送单元，用于向该会话管理功能网元发送第三上报信息，该第三上报信息中包括该第一FQDN，该第三上报信息用于第一指示信息的确定，该第一指示信息指示无法为该终端装置提供服务的第二EAS；该第一指示信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
第十二方面，提供了一种用于发现边缘应用服务器的装置，包括用于执行上述第六方面的任一项可能的实现方式中所述的方法的单元，该装置包括：
处理单元，用于确定第一指示信息，该第一指示信息用于指示无法为该终端装置提供服务的第三EAS；
发送单元，用于向会话管理功能网元发送该第一指示信息；该第一指示信息用于确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
第十三方面，提供一种用于发现边缘应用服务器的装置，该用于发现边缘应用服务器的装置包括处理器，用于实现上述第一方面描述的方法中会话管理功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第一方面描述的方法中会话管理功能网元的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合，该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第一方面描述的方法中会话管理功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括通信接口，该通信接口用于该用于发现边缘应用服务器的装置与其它设备进行通信。该通信接口可以为收发器、输入/输出接口、或电路等。
在一种可能的设计中，该用于发现边缘应用服务器的装置包括：处理器和通信接口，
该处理器用于运行计算机程序，以使得该用于发现边缘应用服务器的装置实现上述第一方面描述的任一种方法；
该处理器利用该通信接口与外部通信。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种可能的设计中，该用于发现边缘应用服务器的装置为芯片或芯片系统。该通信接口可以是该芯片或芯片系统上输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第十四方面，提供一种用于发现边缘应用服务器的装置，该用于发现边缘应用服务器的装置包括处理器，用于实现上述第二方面描述的方法中应用功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第二方面描述的方法中应用功能网元的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合，该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第二方面描述的方法中应用功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括通信接口，该通信接口用于该用于发现边缘应用服务器的装置与其它设备进行通信。该通信接口可以为收发器、输入/输出接口、或电路等。
在一种可能的设计中，该用于发现边缘应用服务器的装置包括：处理器和通信接口，
该处理器利用该通信接口与外部通信；
该处理器用于运行计算机程序，以使得该用于发现边缘应用服务器的装置实现上述第二方面描述的任一种方法。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种可能的设计中，该用于发现边缘应用服务器的装置为芯片或芯片系统。该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第十五方面，提供一种用于发现边缘应用服务器的装置，该用于发现边缘应用服务器的装置包括处理器，用于实现上述第三至第五方面描述的方法中用户面功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第三至第五方面描述的方法中用户面功能网元的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合， 该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第三至第五方面描述的方法中用户面功能网元的功能。
可选地，该用于发现边缘应用服务器的装置还可以包括通信接口，该通信接口用于该用于发现边缘应用服务器的装置与其它设备进行通信。该通信接口可以为收发器、输入/输出接口、或电路等。
在一种可能的设计中，该用于发现边缘应用服务器的装置包括：处理器和通信接口，
该处理器利用该通信接口与外部通信；
该处理器用于运行计算机程序，以使得该用于发现边缘应用服务器的装置实现上述第三至第五方面描述的任一种方法。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种可能的设计中，该用于发现边缘应用服务器的装置为芯片或芯片系统。该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第十六方面，提供一种用于信息传输的装置，该用于信息传输的装置包括处理器，用于实现上述第六方面描述的方法中终端装置的功能。
可选地，该用于信息传输的装置还可以包括存储器，该存储器与该处理器耦合，该处理器用于实现上述第六方面描述的方法中终端装置的功能。
在一种可能的实现中，该存储器用于存储程序指令和数据。该存储器与该处理器耦合，该处理器可以调用并执行该存储器中存储的程序指令，用于实现上述第六方面描述的方法中终端装置的功能。
可选地，该用于信息传输的装置还可以包括通信接口，该通信接口用于该用于信息传输的装置与其它设备进行通信。该通信接口可以为收发器、输入/输出接口、或电路等。
在一种可能的设计中，该用于信息传输的装置包括：处理器和通信接口，
该处理器利用该通信接口与外部通信；
该处理器用于运行计算机程序，以使得该用于信息传输的装置实现上述第六方面描述的任一种方法。
可以理解，该外部可以是处理器以外的对象，或者是该装置以外的对象。
在另一种可能的设计中，该用于信息传输的装置为芯片或芯片系统。该通信接口可以是该芯片或芯片系统上的输入/输出接口、接口电路、输出电路、输入电路、管脚或相关电路等。该处理器也可以体现为处理电路或逻辑电路。
第十七方面，本申请提供一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十八方面，本申请提供一种包括指令的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
第十九方面，提供了一种通信系统，包括第七方面所示的用于发现边缘应用服务器的装置以及第八方面至第十二方面中任意一个或多个方面中所示的用于发现边缘应用服务器的装置。
第二十方面，提供了一种芯片装置，包括处理电路，该处理电路用于从存储器中调用并运行程序，使得安装有该芯片装置的通信设备执行上述第一至第六方面中任一种可能实 现方式中的方法。
附图说明
图1中的(a)和图1中的(b)是本申请实施例适用的通信系统。
图2是一种发现EAS的方法的示意性流程图。
图3是一种边缘计算场景示意图。
图4是一种DNS查询示意性流程图。
图5是本申请实施例提供的一种用于发现边缘应用服务器的方法的示意性流程图。
图6是一种发现边缘应用服务器的方法的示意性流程图。
图7是另一种发现边缘应用服务器的方法的示意性流程图。
图8是又一种发现边缘应用服务器的方法的示意性流程图。
图9是又一种发现边缘应用服务器的方法的示意性流程图。
图10是又一种发现边缘应用服务器的方法的示意性流程图。
图11是本申请实施例提供的装置的示意性框图。
图12是本申请实施例提供的装置的另一示意性框图。
图13是本申请实施例提供的一种装置的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)系统或新无线(new radio，NR)或长期演进(long term evolution，LTE)系统等。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统。本申请实施例的技术方案还可以应用于设备到设备(device to device，D2D)通信，车辆外联(vehicle-to-everything，V2X)通信，机器到机器(machine to machine，M2M)通信，机器类型通信(machine type communication，MTC)，以及物联网(internet of things，IoT)通信系统或者其他通信系统。
为便于理解本申请实施例，首先结合图1简单介绍本申请实施例适用的通信系统。
作为示例性说明，图1中的(a)示出了本申请实施例适用的一种5G系统100a的架构示意图。如图1中的(a)所示，该网络架构可以包括但不限于以下网元(或者称为功能网元、功能实体、节点、设备等)：
用户设备(user equipment，UE)、(无线)接入网设备(radio access network，(R)AN)、用户面功能(user plane function，UPF)网元、边缘应用服务器(edge application server，EAS)、接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、网络开放功能(network exposure function，NEF)网元、EASDF网元、网络存储功能(NF repository function，NRF)网元、策略控制功能(policy control function，PCF)网元、应用功能(application function，AF)网元、统一数据管理(unified data management，UDM)网元等。
下面对图1中的(a)中示出的各网元进行简单介绍：
1、用户设备：可以称为终端设备(terminal equipment)、终端装置、接入终端、用户 单元、用户站、移动站、移动台(mobile station，MS)、移动终端(mobile terminal，MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备可以是一种向用户提供语音/数据连通性的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例可以为：手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑(如笔记本电脑、掌上电脑等)、移动互联网设备(mobile internet device，MID)、虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等。
此外，终端设备还可以是物联网(Internet of things，IoT)系统中的终端设备。IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。IoT技术可以通过例如窄带(narrow band，NB)技术，做到海量连接，深度覆盖，终端省电。
此外，终端设备还可以包括智能打印机、火车探测器等，主要功能包括收集数据(部分终端设备)、接收网络设备的控制信息与下行数据，并发送电磁波，向网络设备传输上行数据。
应理解，用户设备可以是任何可以接入网络的设备。终端设备与接入网设备之间可以采用某种空口技术相互通信。
可选地，用户设备可以用于充当基站。例如，用户设备可以充当调度实体，其在V2X或D2D等中的用户设备之间提供侧行链路信号。比如，蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信，而无需通过基站中继通信信号。
2、(无线)接入网设备：用于为特定区域的授权用户设备提供入网功能，并能够根据用户设备的级别，业务的需求等使用不同服务质量的传输隧道。
(R)AN能够管理无线资源，为用户设备提供接入服务，进而完成控制信号和用户设备数据在用户设备和核心网之间的转发，(R)AN也可以理解为传统网络中的基站。
示例性地，本申请实施例中的接入网设备可以是用于与用户设备通信的任意一种具有无线收发功能的通信设备。该接入网设备包括但不限为演进型节点B(evolved Node B，eNB)或5G，如，NR，系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(distributed unit，DU)等。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功 能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，接入网设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的接入网设备，也可以将CU划分为核心网(core network，CN)中的接入网设备，本申请对此不做限定。
3、用户面功能网元：用户面功能网元主要包括以下功能：数据包路由和传输、包检测、业务用量上报、服务质量(quality of service，QoS)处理、合法监听、上行包检测、下行数据包存储等用户面相关的功能。
示例性地，UPF可以分为协议数据单元会话锚点UPF(protocol data unit session anchor UPF，PSA UPF)和上行分类器功能UPF(uplink classifier functionality UPF，UL CL UPF)。
图1中的(a)所示的UPF为PSA UPF，PSA UPF为支持PDU会话锚点功能的UPF，UE通过N1接口与AMF连接；AN通过N2接口与AMF连接，通过N3接口与PSA UPF连接；PSA UPF通过N4接口与SMF连接；PSA UPF通过N6接口与EAS连接。
下文中，为了描述简洁PSA UPF可以简称为PSA；UL CL UPF可以简称为UL CL。
在5G架构中称之为的用户面功能网元，在未来通信系统中，用户面功能网元仍可以是UPF网元，或者，还可以有其它的名称，本申请不做限定。
4、边缘应用服务器：为部署在边缘数据网络中的应用。
该边缘应用还可以称为“应用实例”。具体是指一个服务器应用程序(例如，社交媒体软件、增强现实(augmented reality，AR)、虚拟现实(virtual reality，VR))部署运行在边缘数据网络(edge data network，EDN)的实例(instance)。一个应用(或者也可以称为业务)可在一个或多个EDN中部署一个或多个EAS，部署运行在不同的EDN中的EAS可以认为是一个应用的不同的EAS，它们可以共享一个域名，也可以与部署在云上的应用使用不同的域名，其中域名可以是全限定域名(fully qualified domain name，FQDN)，可以使用一个任意播放的IP地址，也可以使用不同的IP地址。
可以理解的是，EAS也可以称为边缘应用(服务器)、应用实例、边缘应用实例、多接入边缘计算(multi-access edge computing，MEC)应用(服务器)、EAS功能等。
EDN可以是本地数据中心(local part of DN)，EDN包含边缘使能服务器(edge enabler server，EES)和多个EAS，每个EDN有特定的服务范围。
5、接入和移动性管理功能网元：移动性管理网元主要包括以下功能：连接管理、移动性管理、注册管理、接入认证和授权、可达性管理、安全上下文管理等接入和移动性相关的功能。
在5G架构中称之为的接入和移动性管理功能网元，在未来通信系统中，接入和移动性管理功能网元仍可以是AMF网元，或者，还可以有其它的名称，本申请不做限定。
6、会话功能管理网元：主要用于会话管理、终端设备的网络互连协议(internet protocol，IP)地址分配和管理、选择可管理用户平面功能、策略控制和收费功能接口的终结点以及下行数据通知等。
在未来通信系统中，会话管理功能网元仍可以是SMF网元，或者，还可以有其它的名称，本申请不做限定。
7、网络开放功能网元：可以理解为能力开放网元在5G架构中的命名。其中，能力开放网元主要包括以下功能：安全的开放3GPP网络功能提供的业务和能力，有内部开放，或者开放给第三方等；转化或翻译与AF交互的信息和内部网络功能交互的信息，如AF服务标识和内部5G核心网信息如数据网络名(data network name，DNN)，单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)等。
8、EAS发现功能网元：主要负责发现EAS，包含的功能有注册到NRF以供发现和选择、根据SMF的指示处理DNS消息(例如，接收SMF发送的DNS消息处理规则、将DNS消息发送至本地DNS server或中心DNS server、为DNS query message添加ECS option、交换UE发送的DNS消息、向SMF通知EASDF相关信息等)、终止DNS安全等。
9、网络存储功能网元：可以理解为网络存储功能网元在5G架构中的命名。其中，网络存储功能网元主要包括以下功能：服务发现功能，维护可用的网络功能(network function，NF)实例的NF文本以及他们支持的服务。
10、策略控制功能网元：用于指导网络行为的统一策略框架，为控制面功能网元(例如AMF，SMF网元等)提供策略规则信息等。
在未来通信系统中，策略控制功能网元仍可以是PCF网元，或者，还可以有其它的名称，本申请不做限定。
11、应用功能网元：用于进行应用影响的数据路由提供应用层信息，可以通过接入网络开放功能网元，与策略框架交互或直接与策略框架交互进行策略决策请求控制等。
在未来通信系统中，应用功能网元仍可以是AF网元，或者，还可以有其它的名称，本申请不做限定。
12、统一数据管理网元：可以理解为统一数据管理网元在5G架构中的命名。其中，统一数据管理网元主要包括以下功能：统一数据管理，支持3GPP认证和密钥协商机制中的认证信任状处理，用户身份处理，接入授权，注册和移动性管理，签约管理，短消息管理等。
在未来通信系统中，统一数据管理网元仍可以是UDM网元，或者，还可以有其它的名称，本申请不做限定。
作为示例性说明，图1中的(b)示出了本申请实施例适用的另一种5G系统100b的架构示意图。图1中的(b)示出的系统100b和图1中的(a)示出的系统100a不同在于：图1中的(a)示出的系统100a中5G系统不通过UL CL/BP提供到EAS的接入，图1中的(b)示出的系统100b中5G系统通过UL CL/BP提供到EAS的接入。如图1中的(b)所示，该网络架构可以包括但不限于以下网元(或者称为功能网元、功能实体、节点、设备等)：
UE、(R)AN、UPF、EAS、中心DN、AMF网元、SMF网元、NEF网元、EASDF网元、NRF网元、PCF网元、AF网元、UDM网元等。
图1中的(b)包括的网元以及各个网元之间的连接与图1中的(a)类似，与图1中的(a)类似的不再赘述，不同点在于：
1、图1中的(b)所示的UPF包括UL CL UPF(或者称为分支点UPF(branching point UPF，BPUPF))、本地PSA UPF(local PSA UPF，L-PSA UPF)以及中心PSA UPF(central PSA UPF，C-PSA UPF)。
其中，UL CL UPF为具有上行分类器功能的UPF。UE通过N1接口与AMF连接；AN通过N2接口与AMF连接，通过N3接口与UL CL UPF连接；UL CL UPF通过N4接口与SMF连接，通过N9接口与PSA UPF连接；SMF通过N4接口分别与PSA UPF连接；C-PSA UPF通过N6接口与中心DN连接；L-PSA UPF通过N6接口与EAS连接。
2、图1中的(b)所示架构中处理包括EAS之外还包括中心DN。
可以理解的是，上述网元或者功能网元既可以是硬件设备中的网络元件，也可以是在专用硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。
在图1所示的网络架构中，各网元之间可以通过图中所示的接口通信，部分接口可以采用非服务化接口的方式实现。如图1所示，UE和AMF之间可以通过N1接口进行交互，交互消息例如可以称为N1消息(N1Message)。RAN和AMF之间可以通过N2接口进行交互，N2接口可以用于非接入层(non-access stratum，NAS)消息的发送等。RAN和UPF之间可以通过N3接口进行交互，N3接口可以用于传输用户面的数据等。SMF和UPF之间可以通过N4接口进行交互，N4接口可以用于传输例如N3连接的隧道标识信息，数据缓存指示信息，以及下行数据通知消息等信息。UPF和DN之间可以通过N6接口进行交互，N6接口可以于传输用户面的数据等。
另外，图1中控制面功能的各个网元也可以通过服务化接口进行通信，比如，AMF经过Namf接口接入服务化架构，提供相应的服务；SMF经过Nsmf接口接入服务化架构，提供相应的服务；同理，NRF、PCF以及AF经过各自对应的接口接入服务化架构，提供相应的服务，这里不再赘述。其他接口与各网元之间的关系如图1中所示，为了简洁，这里不一一详述。
应理解，上述本申请实施例能够应用的网络架构仅是示例性说明，本申请实施例适用的网络架构并不局限于此，任何包括能够实现上述各个网元的功能的网络架构都适用于本申请实施例。
还应理解，图1中所示的AMF、SMF、UPF、PCF等可以理解为用于实现不同功能的网元，例如可以按需组合成网络切片。这些网元可以各自独立的设备，也可以集成于同一设备中实现不同的功能，或者可以是硬件设备中的网络元件，也可以是在专用硬件上运行的软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能，本申请对于上述网元的具体形态不作限定。
还应理解，上述命名仅为便于区分不同的功能而定义，不应对本申请构成任何限定。本申请并不排除在5G网络以及未来其它的网络中采用其他命名的可能。例如，在6G网络中，上述各个网元中的部分或全部可以沿用5G中的术语，也可能采用其他名称等。
还应理解，图1中的各个网元之间的接口名称只是一个示例，具体实现中接口的名称可能为其他的名称，本申请对此不作具体限定。此外，上述各个网元之间的所传输的消息(或信令)的名称也仅仅是一个示例，对消息本身的功能不构成任何限定。
下面结合图2详细介绍一种发现EAS的方法。
图2是一种发现EAS的方法的示意性流程图。包括以下步骤：
S211，UE发起会话建立流程。
具体地，UE启动应用(application，APP)发起会话建立流程或重用UE现有会话，以建立UE与UPF之间的用户面连接。
在会话建立过程中，SMF选择EASDF，图2所示的方法流程还包括：
S212，SMF选择EASDF。
需要说明的是，SMF可以将选择的EASDF的标识(如，EASDF的IP地址)发送给UE。另外，SMF可以选择UPF PSA。
本申请实施例中对于UE启动APP，发起会话建立过程以及SMF选择EASDF和UPF PSA的具体实现方式不做限定，可以参考目前相关技术中的描述，这里不再赘述。
进一步地，SMF和EASDF之间建立DNS消息处理规则，图2所示的方法流程还包括：
S213，SMF和EASDF交互，以建立EASDF上的DNS消息处理规则。
具体地，包括：
SMF向EASDF发送DNS上下文建立请求消息(例如，可以是Neasdf_DNSContext_Create Request)；
EASDF向SMF发送DNS上下文建立响应消息(例如，可以是Neasdf_DNSContext_Create Response)。
当DNS消息处理规则需要更新的情况下，图2所示的方法流程还包括：
S214，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：
SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
需要说明的是，本申请实施例中对于DNS消息处理规则需要更新的情况的不做限定，可以是用于建立EASDF上的DNS消息处理规则的相关信息发生变化，或者其他情况，这里不赘述。
在EASDF上的DNS消息处理规则建立或者更新之后，图2所示的方法流程还包括：
S215，UE向EASDF发送DNS查询信息。
具体地，该DNS查询信息通过RAN、UPF发送至EASDF。DNS查询信息中携带APP的FQDN。
EASDF收到DNS查询信息之后根据上述的DNS消息处理规则通知SMF，图2所示的方法流程还包括：
S216，EASDF向SMF发送通知请求消息(例如，可以是Neasdf_DNSContext_Notify Request)。
该通知请求消息中携带APP的FQDN。
S217，SMF向EASDF发送通知响应消息(例如，可以是Neasdf_DNSContext_Notify Response)。
进一步地，SMF根据APP的FQDN、EAS部署信息、UE位置等，确定构造ECS option 的信息或用于确定local DNS server地址的信息(如IP address)，并将构造ECS option的信息或local DNS server地址发送至EASDF。
作为一种可能的实现方式，在EAS部署信息为FQDN、IP地址(address)、数据网络接入标识(data network access identifier，DNAI)的对应关系的情况下，SMF确定用于构造ECS option的信息，该用于构造ECS option的信息可以是IP地址，其中，EAS部署信息中的IP地址以及用于构造ECS option的信息可以是一个地址范围，例如，某个IP子网。
作为另一种可能的实现方式，在EAS部署信息为FQDN、local DNS server地址、DNAI的对应关系的情况下，SMF确定local DNS server地址。
图2所示的方法流程还包括：
S218，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：
SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
该DNS上下文更新请求消息中包括构造ECS option的信息，或者local DNS server地址。
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
进一步地，图2所示的方法流程还包括：
S219，EASDF向DNS服务器发送DNS查询信息。
可选的，DNS query message中包含ECS option；或者，EASDF向local DNS server发送DNS query message。
其中，ECS option可以是EASDF根据构造ECS option的信息构造的，或者还可以是SMF根据构造ECS option的信息构造的。
本申请实施例中对于构造ECS option的实体、构造ECS option的方式以及ECS option的内容不做限制，本申请后续实施例中主要涉及SMF是基于哪些信息确定构造ECS option的信息的，或确定local DNS server的。
S220，EASDF接收DNS server发送的DNS响应消息。
该DNS响应消息中携带EAS IP。
EASDF收到EAS IP之后通知SMF，图2所示的方法流程还包括：
S221，EASDF向SMF发送通知请求消息(例如，可以是Neasdf_DNSContext_Notify Request)。
该通知消息中携带EAS IP。
S222，SMF向EASDF发送通知响应消息(例如，可以是Neasdf_DNSContext_Notify Response)。
可选地，SMF基于FQDN、EAS IP、EAS部署信息，确定DANI，并在DNAI位置插入ULCL UPF和L-PSA，图2所示的方法流程还包括：
S223，SMF插入ULCL UPF和L-PSA。
需要说明的是，SMF选择的UPF(或者传输路径)可以无需改变，即无需插入ULCL  UPF和L-PSA。
S224，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：
SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
S225，EASDF向UE发送DNS response消息。
该DNS response消息中携带EAS IP。
由上述图2所述的EAS的方法流程可知，SMF在确定发送给EASDF的处理DNS query的信息时(例如构建ECS option的信息，或者DNS server标识)，考虑FQDN、EAS部署信息(如FQDN、IP address、DNS server标识、DNAI的对应关系)和UE位置。但是仅考虑这些因素可能导致确定的处理DNS query的信息对应的边缘计算平台或EAS负载过高，或者平台升级服务器无法提供服务等情况，这些情况下会出现服务质量下降(例如响应时延变大等)、拒绝服务接入、或者无法连接到服务器等问题。
为了解决上述的发现EAS的方法中存在的问题，本申请提供一种发现边缘应用服务器的方法，SMF在确定处理DNS query的信息时增加额外的考虑因素(例如，EAS的选择权重、EAS的负载状态、EAS的服务状态或无法为UE提供服务的EAS等)，避免确定的处理DNS query的信息对应的边缘计算平台或EAS负载过高，或者平台升级服务器无法提供服务等情况。
应理解，本申请实施例提供的方法可以应用于5G通信系统，例如，图1中所示的通信系统。但是，本申请实施例中并不限定该方法能够应用的场景，例如，其他包括能够实现相应功能的网元的网络架构中同样适用
为了便于理解本申请实施例的技术方案，在以5G架构为基础介绍本申请实施例的方案之前，首先对本申请实施例可能涉及到的5G中的一些术语或概念进行简单描述。
1、5G架构。
第三代合作伙伴计划(3rd generation partnership project，3GPP)中定义的演进分组系统(evolved packet system，EPS)包括基于服务化接口的5G网络架构中或基于点对点接口的5G网络架构中，5G网络可分为三部分，分别是UE、DN和运营商网络。
其中，运营商网络可以包括图1中除UE和DN之外所示的网元中的一个或者多个，或者还可以包括其他的网元，本申请对于5G网络结构不做限定，可以参考目前相关技术中的介绍。
2、边缘计算。
移动通信的飞速发展促进了各种新型业务的不断涌现，除了传统的移动宽带、物联网之外，移动通信催生了许多新的应用领域如增强现实(augmented reality，AR)技术、虚拟现实(virtual reality，VR)技术、车联网技术、工业控制、IOT等，同时对网络带宽、时延等性能也提出了更高的需求，网络负荷进一步加重。
LTE中传统的集中式锚点部署方式越来越难以支撑快速增长的移动业务流量模型。一方面，在锚点网关集中式部署的网络中，增长的流量最终集中在网关及核心机房处，对回 程网络带宽、机房吞吐量和网关规格提出了越来越高的要求；另一方面，从接入网到锚点网关长距离的回程网络和复杂的传输环境，导致用户报文传输的较大时延和抖动。
基于上述情况，业界提出了边缘计算。边缘计算通过将用户面网元及业务处理能力下移到网络边缘，实现了分布式的业务流量本地处理，避免了流量的过度集中，从而大大降低了对核心机房和集中网关的规格要求。同时边缘计算也缩短了回程网络的距离，降低了用户报文的端到端传输时延和抖动，使得超低时延业务的部署称为可能。
图3是一种边缘计算场景示意图。
相比于DN网络而言，边缘计算平台部署在下沉的UPF(即本地UPF)处；DN网络部署在远端UPF处。与UE访问DN的路径(如图3中的虚线所示)相比，UE访问边缘计算平台的路径(如图3中的实线所示)大大缩短。因此，边缘计算技术可以为用户提供低时延、高带宽服务。
3、DNS。
随着移动手机用户数量的不断增长，各类手机终端支持的业务功能不断增加，例如手机QQ、微信、飞信、手机证券、手机浏览、文件下载等功能已逐步成为手机终端，尤其是智能手机的主流应用。在上网过程中，手机需要对访问的业务的域名查询其真实IP地址，以便发送数据包。这项操作需要UE通过查询DNS server才能完成。
DNS是一种主机信息数据库，提供域名(domain name)和IP地址之间的映射和转换。
例如，UE可以通过DNS server将域名解析为对应的IP地址。从而实现UE对业务的访问。
一种DNS查询过程如图4所示。图4是一种DNS查询示意性流程图。以UE启动某个应用为例说明DNS查询过程，具体地，在执行DNS查询之前，包括：
UE启动应用(application，APP)。
具体地，UE启动APP包括：UE发起会话建立流程或重用UE现有会话，以建立UE与UPF之间的用户面连接。在用户面连接建立过程中，SMF将DNS server地址发送至UE。
针对该APP(或者说，该业务)，UE判断是否有该业务的域名相关的DNS记录。DNS记录，指的是域名和IP地址的对应关系。
若有，则UE根据DNS记录，确定该域名对应的IP地址。并使用该IP地址作为该业务的目的IP。
若没有，则UE发起DNS查询过程。包括以下步骤：
S410，UE向DNS sever发送DNS query消息。
该DNS query消息携带该业务的域名。具体地，该DNS query消息，通过UE与UPF之间的用户面连接发送至DNS server。
DNS server接收到DNS query消息之后需要确定DNS记录，图4所示的方法流程还包括：
S420，DNS server确定DNS记录。
具体地，DNS server查询数据库，得到该域名对应的IP地址。
进一步地，DNS server确定DNS记录之后需要将该DNS记录发送给UE，图4所示的方法流程还包括：
S430，DNS server向UE发送DNS response消息。
该DNS response消息中携带域名对应的IP地址、生存时间(time to live，TTL)。其中，生存时间(time to live，TTL)表明DNS记录可以缓存的时间。0代表该DNS记录不能被缓存。
进一步地，UE接收到DNS记录之后可以保存该DNS记录，图4所示的方法流程还包括：
S440，UE保存DNS记录。
具体地，UE保存域名和IP地址的对应关系。
4、EAS的负载状态。
EAS的负载状态可以是一个EAS各项系统资源运行状态的综合表征，这些资源运行状态可以是中央处理器(central processing unit，CPU)使用状态、内存使用状态、输入/输出(input/output，I/O)使用状态、连接用户数、请求连接数、或带宽等，也可以是其中的多种或全部。当这些资源运行状态达到一定的程度时，可能无法再为用户提供服务，或者无法再接受新用户的接入。此时，可以认为该EAS发生过载(overload)。
可以理解的是，同一个应用的不同EAS的负载状态可以不同，不同应用的不同EAS也可以不同。也就是说，不同应用可以分别独立统计自己对应的EAS的负载情况。例如，针对第一应用的EAS过载时，针对第二应用的EAS也可能是正常状态。
5、EAS的服务状态。
EAS的服务状态可以是一个EAS是否可以提供服务的表征，例如，EAS的服务状态可以是链路不可达、在线、关机、死机或系统升级等。
6、EAS的选择权重。
本申请实施例中涉及的EAS的选择权重的可以理解为AF提供的边缘计算平台对应的DNAI的选择偏好和/或选择概率，或者还可以理解成，AF提供的边缘计算平台中的边缘应用对应的DNAI的选择偏好和/或选择概率。其中，“偏好”可以按照优先级的形式体现；“概率”可以基于数字(如，0到1之间的数字)体现。
例如，一个DNAI对应一个选择权重，或者一个DNAI对应一个选择权重列表，该选择权重列表中的多个选择权重分别对应多个FQDN。
其中，DNAI可以理解为部署了边缘计算应用的数据网络的用户面接入标识。
需要说明的是，本申请实施例中EAS的选择权重还可以称为EAS的选择加权因子，或选择信息等。
上文结合图1介绍了本申请实施例能够应用的场景，并且结合图2简单介绍了目前的发现EAS的方法存在的缺陷，还简单介绍了本申请中涉及的基本概念，下文中将结合附图详细介绍本申请提供的发现边缘应用服务器的方法。
下文示出的实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是核心网设备，或者是核心网设备中能够调用程序并执行程序的功能模块。
为了便于理解本申请实施例，做出以下几点说明。
第一，在本申请中，“用于指示”可以理解为“使能”，“使能”可以包括直接使能和间接 使能。当描述某一信息用于使能A时，可以包括该信息直接使能A或间接使能A，而并不代表该信息中一定携带有A。
将信息所使能的信息称为待使能信息，则具体实现过程中，对待使能信息进行使能的方式有很多种，例如但不限于，可以直接使能待使能信息，如待使能信息本身或者该待使能信息的索引等。也可以通过使能其他信息来间接使能待使能信息，其中该其他信息与待使能信息之间存在关联关系。还可以仅仅使能待使能信息的一部分，而待使能信息的其他部分则是已知的或者提前约定的。例如，还可以借助预先约定(例如协议规定)的各个信息的排列顺序来实现对特定信息的使能，从而在一定程度上降低使能开销。同时，还可以识别各个信息的通用部分并统一使能，以降低单独使能同样的信息而带来的使能开销。
第二，在本申请中示出的第一、第二以及各种数字编号(例如，“#1”、“#2”等)仅为描述方便，用于区分的对象，并不用来限制本申请实施例的范围。例如，区分不同消息等。而不是用于描述特定的顺序或先后次序。应该理解这样描述的对象在适当情况下可以互换，以便能够描述本申请的实施例以外的方案。
第三，在本申请中，“预配置”可包括预先定义，例如，协议定义。其中，“预先定义”可以通过在设备(例如，包括各个网元)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现，本申请对于其具体的实现方式不做限定。
第四，本申请实施例中涉及的“保存”，可以是指的保存在一个或者多个存储器中。所述一个或者多个存储器，可以是单独的设置，也可以是集成在编码器或者译码器，处理器、或通信装置中。所述一个或者多个存储器，也可以是一部分单独设置，一部分集成在译码器、处理器、或通信装置中。存储器的类型可以是任意形式的存储介质，本申请并不对此限定。
第五，本申请实施例中涉及的“协议”可以是指通信领域的标准协议，例如可以包括5G协议、新空口(new radio，NR)协议以及应用于未来的通信系统中的相关协议，本申请对此不做限定。
以下，以网元之间的交互为例详细说明本申请实施例提供的发现边缘应用服务器的方法。
图5是本申请实施例提供的一种用于发现边缘应用服务器的方法的示意性流程图。
为了便于描述，以会话管理功能网元为5G网络中的SMF、应用功能网元为5G网络中的AF、用户面功能网元为5G网络中的UPF、终端装置为UE为例进行说明，本申请实施例中对于网元或装置的名称不做限定，其他能够实现相应功能的网元也在本申请的保护范围之内。
图5所示的流程包括以下步骤：
S510，SMF获得第一指示信息或至少一个边缘应用服务器EAS的信息。
其中，SMF是为终端装置的会话提供服务的网元。
需要说明的是，本申请实施例中SMF获得信息可以理解为SMF从其他网元(如，AF)接收到信息，还可以理解为SMF自身确定得到该信息。该EAS的信息用于指示以下至少一项：
EAS的负载状态、EAS的服务状态或EAS的选择权重。
第一指示信息用于指示无法为终端装置提供服务的EAS。
可选地，上述的EAS的信息可以是指示EAS是否过载的指示信息。
例如，当EAS或者边缘
计算平台的负载量超过80％时发送EAS的信息，该EAS的信息指示过载；当EAS或者边缘计算平台的负载量低于50％发送EAS的信息，该EAS的信息指示不过载(或轻载)。
还例如，当EAS或者边缘计算平台的资源利用量超过80％时发送EAS的信息，该EAS的信息指示过载；当EAS或者边缘计算平台的资源利用量低于50％发送EAS的信息，该EAS的信息指示不过载(或轻载)。
可选地，上述的EAS的信息可以是EAS的负载量的百分比。
例如，当EAS或者边缘计算平台的负载量超过80％时发送EAS的信息，该EAS的信息指示负载量超过80％，可以基于该EAS的信息确定EAS过载；当EAS或者边缘计算平台的负载量低于50％发送EAS的信息，该EAS的信息指示负载量低于50％，可以基于该第一指示信息确定EAS不过载(或轻载)。
可选地，上述的EAS的信息可以是EAS的资源利用量的百分比。
例如，当EAS或者边缘计算平台的资源利用量超过80％时发送EAS的信息，该EAS的信息指示资源利用量超过80％，可以基于该EAS的信息确定EAS过载；当EAS或者边缘计算平台的资源利用量低于50％发送EAS的信息，该EAS的信息指示资源利用量低于50％，可以基于该EAS的信息确定EAS不过载(或轻载)。
应理解，上述只是举例说明EAS的信息可以为指示EAS是否过载的指示信息、EAS的负载量的百分比或EAS的资源利用量的百分比等，对本申请的保护范围不构成任何的限定，其他能够用于指示EAS的负载情况的EAS的信息也在本申请的保护范围之内，例如，EAS的信息为指示该EAS服务的App数量的指示信息等。
由上述可知，EAS的信息既可以是指示EAS是否过载的指示信息，还可以是EAS的负载量的百分比或EAS的资源利用量的百分比等。可以理解如果是指示EAS是否过载的指示信息，可以在过载时发送该EAS的信息；如果是EAS的负载量的百分比或EAS的资源利用量的百分比，需要在百分比发生变化的情况下就发送EAS的信息，相对而言EAS的负载量的百分比或EAS的资源利用量的百分比的发送需要动态发送。
可选地，上述的EAS的信息可以是指示该EAS是否链路可达的指示信息。
例如，在某个EAS的链路不可达的情况下，发送EAS的信息，该EAS的信息指示EAS的链路不可达；在某个EAS的链路可达的情况下，发送EAS的信息，该EAS的信息指示EAS的链路可达。
可选地，上述的EAS的信息可以是指示该EAS是否在线的指示信息。
例如，在某个EAS未在线的情况下，发送EAS的信息，该EAS的信息指示EAS未在线；在某个EAS在线的情况下，发送EAS的信息，该EAS的信息指示EAS在线。
可选地，上述的EAS的信息可以是指示该EAS是否关机的指示信息。
例如，在某个EAS未关机的情况下，发送EAS的信息，该EAS的信息指示EAS未关机；在某个EAS关机的情况下，发送EAS的信息，该EAS的信息指示EAS关机。
可选地，上述的EAS的信息可以是指示该EAS是否死机的指示信息。
例如，在某个EAS未死机的情况下，发送EAS的信息，该EAS的信息指示EAS未 死机；在某个EAS死机的情况下，发送EAS的信息，该EAS的信息指示EAS死机。
可选地，上述的EAS的信息可以是指示该EAS是否处于系统升级的指示信息。
例如，在某个EAS未处于系统升级的情况下，发送EAS的信息，该EAS的信息指示EAS未处于系统升级；在某个EAS处于系统升级的情况下，发送EAS的信息，该EAS的信息指示EAS处于系统升级。
应理解，上述只是举例说明EAS的信息可以为指示EAS的链路是否可达、是否在线、是否关机、是否死机、是否处于系统升级状态等的指示信息，对本申请的保护范围不构成任何的限定，其他能够用于指示EAS的服务状态的EAS的信息也在本申请的保护范围之内，例如，EAS的信息为指示该EAS服务的时间的指示信息等。
可选地，上述的EAS的信息可以是指示边缘计算平台对应的DNAI的选择权重。
例如，边缘计算平台#1对应的DNAI#1的选择权重为0.4，边缘计算平台#1对应的DNAI#2的选择权重为0.6时，边缘计算平台#2对应的DNAI#1的选择权重为0.3，边缘计算平台#2对应的DNAI#2的选择权重为0.7时，发送EAS的信息，该EAS的信息指示边缘计算平台#1的所有边缘应用对应的DNAI#1和DNAI#2的选择权重分别为0.4和0.6，指示边缘计算平台#2的所有边缘应用对应的DNAI#1和DNAI#2的选择权重分别为0.3和0.7。
还例如，边缘计算平台#1对应的DNAI#1的选择权重为0.4，边缘计算平台#2对应的DNAI#2的选择权重为0.6时，发送EAS的信息，该EAS的信息指示边缘计算平台#1的所有边缘应用对应的DNAI#1的选择权重为0.4，指示边缘计算平台#2的所有边缘应用对应的DNAI#2的选择权重为0.6。
可选地，上述的EAS的信息可以是指示边缘计算平台的边缘应用对应的DNAI的选择权重。
例如，边缘计算平台#1中的边缘应用#1对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.2，边缘计算平台#1中的边缘应用#2对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.1，边缘计算平台#2中的边缘应用#1对应的DNAI#1和DNAI#2的选择权重分别为0.4和0.3，边缘计算平台#2中的边缘应用#2对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.4，发送EAS的信息，该EAS的信息指示边缘计算平台#1中的边缘应用#1对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.2，指示边缘计算平台#1中的边缘应用#2对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.1，指示边缘计算平台#2中的边缘应用#1对应的DNAI#1和DNAI#2的选择权重分别为0.4和0.3，指示边缘计算平台#2中的边缘应用#2对应的DNAI#1和DNAI#2的选择权重分别为0.1和0.4。
还例如，边缘计算平台#1中的边缘应用#1和边缘应用#2对应的DNAI#1的选择权重分别为0.1和0.2，边缘计算平台#2中的边缘应用#1和边缘应用#2对应的DNAI#2的选择权重分别为0.9和0.8，发送EAS的信息，该EAS的信息指示边缘计算平台#1中的边缘应用#1和边缘应用#2对应的DNAI#1的选择权重分别为0.1和0.2，指示边缘计算平台#2中的边缘应用#1和边缘应用#2对应的DNAI#2的选择权重分别为0.9和0.8。
作为一种可能的实现方式，上述的选择权重可以理解为对应的DNAI的选择概率，例如，该选择概率可以用0到1之间的数字表示，值越大选择的概率越大。
作为另一种可能的实现方式，上述的选择权重可以理解为对应的DNAI的选择偏好 (或者说优先级)，例如，该选择偏好可以用0到1之间的数字表示，值越大选择的优先级越高。
作为又一种可能的实现方式，上述的选择权重可以理解为对应的DNAI的选择概率和选择偏好(或者说优先级)的，例如，该选择概率可以用0到1之间的数字表示，值越大选择的概率越大；该选择偏好可以用0到1之间的数字表示，值越大选择的优先级越高，选择权重为选择概率和选择偏好的平均值。
可选地，上述的第一指示信息可以是某个EAS的标识，该标识信息用于指示某个EAS。
例如，EAS的标识可以是某个EAS的IP地址，或者某个EAS的名称，或者用于确定某个EAS的FQDN等信息。
应理解，上述只是举例说明第一指示信息可以为指示EAS的信息，对本申请的保护范围不构成任何的限定，其他能够用于指示EAS的第一指示信息也在本申请的保护范围之内。
本申请实施例中在SMF获得多个EAS的信息的情况下，SMF可以分别获得部分或所有EAS中每个EAS的信息。
具体地，SMF可以通过多种方式获得至少一个EAS的信息，以下为方式一、方式二、方式三、方式四和方式五为例分别进行说明，这五种方式也可相互结合。
方式一，SMF从AF处获得到上述的至少一个EAS的信息。
在该方式一下，图5所示的方法流程还包括：
S511，SMF接收来自AF的至少一个EAS的信息，或者说AF向SMF发送至少一个EAS的信息。
其中，至少一个EAS的信息可以是至少一个边缘计算平台的信息，至少一个边缘计算平台中部署有至少一个EAS，至少一个边缘计算平台的信息用于指示至少一个EAS的信息。
示例性地，边缘计算平台可以理解为EDN或边缘使能服务器(edge enabler server，EES)等，或者还可以是其他的部署有EAS的一个平台，本申请实施例中对于边缘计算平台的具体体现形式不做限定。
例如，SMF如果获得的是边缘计算平台的信息(如，边缘计算平台的选择权重，边缘计算平台是否过载，边缘计算平台的服务状态)等，间接获得该边缘计算平台中部署的EAS的选择权重、负载信息或服务状态信息。若某个边缘计算平台是过载，则该边缘计算平台中部署的EAS均过载；若边缘计算平台处于无法提供服务的状态，则该边缘计算平台中部署的EAS均无法提供服务。
可选地，SMF接收到来自AF的至少一个EAS的信息之后，可以向AF发送回复信息以表示接收到该EAS的信息。
作为一种可能的实现方式，AF可以主动向SMF提供上述的至少一个EAS的信息。
例如，AF可以通过目前的AF对流量路由的影响(AF influence on traffic routing)流程中向SMF提供EAS的信息。
应理解，本申请实施例中对AF influence on traffic routing流程不进行详细描述，可以参考目前AF influence on traffic routing流程的描述，不同的是，本申请实施例中在AF influence on traffic routing流程中，AF可以向SMF提供上述的至少一个EAS的信息。
示例性地，在AF influence on traffic routing流程的AF向SMF发送的消息中新增EAS的信息或边缘计算平台的信息。
作为另一种可能的实现方式，AF可以基于SMF的订阅或者请求触发向SMF提供上述的至少一个EAS的信息。
例如，SMF向AF发送了订阅信息或者请求信息，用于获得上述的至少一个EAS的信息，在该实现方式下图5所示的方法流程还包括：
S512，SMF向AF发送订阅信息或请求信息，或者说AF接收来自SMF的订阅信息或请求信息。
在AF基于SMF的订阅或请求向SMF提供上述的至少一个EAS的信息情况下，AF可以在响应于订阅信息或请求信息(或者统称为第一消息)的第二消息中携带上述的至少一个EAS的信息。
需要说明的是，方式一中SMF还可以通过目前的流程(如图2所示的流程)获得到其他的信息(如，APP的FQDN、EAS部署信息、UE位置等)，该其他的信息和上述的通过方式一获得的至少一个边缘应用服务器EAS的信息用于确定构造ECS选项的信息，或者用于确定local DNS server地址，下面将结合具体实施例进行说明，这里不再赘述。
方式二，SMF基于从UPF处获得到的数据包检测结果确定上述的至少一个EAS的信息。
在该方式二下，图5所示的方法流程还包括：
S513，SMF向UPF发送第二指示信息，或者说UPF接收来自UPF的第二指示信息。
该第二指示信息用于指示UPF对第一数据包进行检测，该第一数据包的目的IP地址为第一EAS的IP地址(或者说该第一数据包为目的IP地址为第一EAS的IP地址的数据包)。
可选地，UPF为L-PSA UPF，或者UPF为ULCL UPF。
需要说明的是，该第一EAS为上述的至少一个EAS中的任意一个。也就是说，SMF可以通过指示信息指示UPF分别检测目的IP地址为不同的EAS的IP地址的数据包。
例如，SMF可以通过多条第二指示信息分别指示UPF对不同的数据包进行检测，具体地：SMF通过第二指示信息#1，指示UPF对第一数据包#1进行检测，该第一数据包#1的IP地址为第一EAS#1的IP地址；SMF通过第二指示信息#2，指示UPF对第一数据包#2进行检测，该第一数据包#2的IP地址为第一EAS#2的IP地址。其中，第一EAS#1和第一EAS#2为不同的EAS。
为了便于描述，以SMF获得某个EAS的信息为例进行说明。
第二指示信息中包括第一EAS的IP地址和检测指示信息。
示例性地，该检测指示信息可以用于指示UPF进行与第一EAS相关包的深度包检测(Deep Packet Inspection，DPI)；
示例性地，该检测指示信息还可以用于指示UPF检测并上报第一EAS访问量信息以及第一数据包在该UPF以及第一EAS之间的往返时延信息等信息。
作为一种可能的实现方式，SMF可以通过N4会话建立请求向UPF发送第二指示信息；
作为另一种可能的实现方式，SMF可以通过N4会话修改请求向UPF发送第二指示 信息。
应理解，上述只是举例说明SMF可以通过怎样的方式向UPF发送该第二指示信息，对本申请的保护范围不构成任何的限定，其他SMF向UPF发送该第二指示信息的方式也在本申请的保护范围之内，例如，SMF主动向UPF发送该第二指示信息；还例如，协议预定义SMF需要向UPF发送该第二指示信息；又例如，SMF基于其他设备(如，管理设备)的指示向UPF发送该第二指示信息，这里不一一举例说明。
可选地，UPF接收到上述的第二指示信息之后，作为接收到上述的第二指示信息的响应，UPF可以向SMF发送第二回复信息，图5所示的方法流程还包括：
S514，UPF向SMF发送第二回复信息，或者说SMF接收来自UPF的第二回复信息。
可选地，在SMF通过N4会话建立请求向UPF发送第二指示信息的情况下，UPF可以通过N4会话建立回复向SMF发送第二回复信息；
可选地，在SMF通过N4会话修改请求向UPF发送第二指示信息的情况下，UPF可以通过N4会话修改回复向SMF发送第二回复信息。
应理解，上述只是举例说明UPF可以通过怎样的方式向SMF发送该第二回复信息，对本申请的保护范围不构成任何的限定，其他UPF向SMF发送该第二回复信息的方式也在本申请的保护范围之内，这里不一一举例说明。
另外，UPF接收到上述的第二指示信息之后也可以不发送上述的第二回复信息。
具体地，UPF接收到上述的第二指示信息之后，基于该第二指示信息进行数据包检测，图5所示的方法流程还包括：
S515，UPF进行数据包检测。
具体地，UPF按照SMF的指示，统计第一EAS的访问量信息，以及第一数据包在UPF和第一EAS间的往返时延(或者传输时延)信息等信息。
作为一种可能的实现方式，UPF可以通过检测对应的两个第一数据包(一个第一数据包的目的IP地址为第一EAS的IP地址，另一个第一数据包的源IP地址为第一EAS的IP地址)获得往返时延。
上述只是举例说明可能测得时延的方式，对本申请的保护范围不构成任何的限定，本申请实施例中对于如何测得时延不做限定。
需要说明的是，UPF进行第一数据包检测的前提是，UE与第一EAS之间进行了第一数据包传输。
作为一种可能的实现方式，与第一EAS之间进行第一数据包传输的UE为其他的UE(除当前执行发现EAS的UE之外的UE)；
作为另一种可能的实现方式，在当前执行EAS发现的UE发现某个EAS之后，与第一EAS之间进行第一数据包传输的UE为当前的UE。
进一步地，UPF进行数据包检测之后，需要将检测结果发送给SMF，图5所示的方法流程还包括：
S516，UPF向SMF发送第一上报信息，或者说SMF接收来自UPF的第一上报信息。
该第一上报信息中包括和第一数据包的检测结果，该检测结果中包括第一EAS的访问量信息，第一数据包在UPF和第一EAS之间的往返时延信息等。
可选地，该第一上报信息中还可以包括上述的第一EAS的IP地址，或者SMF本地 保存有该第一EAS的IP地址无需UPF通过第一上报信息上报该第一EAS的IP地址。
可选地，UPF可以通过N4会话向SMF发送第一上报信息。
下面以第一上报信息用于第一EAS的信息的确定为例进行说明，还可以根据第一上报信息确定地其他EAS的信息，例如，上述的第二指示信息指示UPF对第一数据包#2进行检测，该第一数据包#2为目的IP地址为第一EAS#2的IP地址的数据包，SMF可以根据第一上报信息确定第一EAS#1的信息，确定方式与SMF确定第一EAS的信息类似，这里不再赘述。
具体地，SMF接收到上述的第一上报信息之后，基于该第一上报信息确定上述的至少一个EAS的信息。
作为一种可能的实现方式，SMF直接根据第一上报信息确定第一EAS的信息。在该实现方式下，图5所示的方法流程还包括：
S517，SMF根据第一上报信息确定至少一个EAS的信息。
示例性地，SMF根据第一上报信息确定第一EAS的信息包括：SMF根据第一EAS的访问量信息确定第一EAS的负载状态。若第一EAS的访问量大(如，超过预设的超载上限阈值)确定第一EAS的负载状态为超载；若第一EAS的访问量小(如，低于预设的超载下限阈值)确定第一EAS的负载状态为轻载。
示例性地，SMF根据第一上报信息确定第一EAS的信息还包括：SMF根据第一数据包在UPF和第一EAS之间的往返时延信息确定第一EAS的服务状态。若往返时延大(如，超过预设的时延上限阈值)确定第一EAS的服务状态为无法提供服务；若往返时延小(如，低于预设的时延下限阈值)确定第一EAS的服务状态为可以提供服务。
作为另一种可能的实现方式，SMF可以将接收到的第一上报信息发送给NWDAF，由NWDAF进行数据分析，确定第一EAS的信息，并将第一EAS的信息发送给SMF。在该实现方式下，图5所示的方法流程还包括：
S518，SMF向NWDAF发送第一上报信息，或者说NWDAF接收来自SMF的第一上报信息。
S519，NWDAF确定第一EAS的信息。
具体地，NWDAF基于第一上报信息进行数据分析确定第一EAS的信息。
示例性地，NWDAF根据第一上报信息确定第一EAS的信息包括：NWDAF根据第一EAS的访问量信息确定第一EAS的负载状态。若第一EAS的访问量大(如，利用数据分析功能得出的结论)确定第一EAS的负载状态为超载；若第一EAS的访问量小(如，利用数据分析功能得出的结论)确定第一EAS的负载状态为轻载。
示例性地，NWDAF根据第一上报信息确定第一EAS的信息还包括：SMF根据第一数据包在UPF和第一EAS之间的往返时延信息确定第一EAS的服务状态。若往返时延大(如，利用数据分析功能得出的结论)确定第一EAS的服务状态为无法提供服务；若往返时延小(如，利用数据分析功能得出的结论)确定第一EAS的服务状态为可以提供服务。
进一步地，NWDAF将第一EAS的信息发送给SMF，图5所示的方法流程还包括：
S520，NWDAF向SMF发送第一EAS的信息。
应理解，本申请实施例中对于如何根据第一上报信息确定至少一个EAS的信息的具 体方式不做限定，能够根据UPF上报的数据包的检测结果确定EAS的信息的方式都在本申请的保护范围之内。
需要说明的是，方式二中SMF还可以通过目前的流程(如图2所示的流程)获得到其他的信息(如，APP的FQDN、EAS部署信息、UE位置等)，该其他的信息和上述的通过方式二获得的至少一个边缘应用服务器EAS的信息用于确定构造ECS选项的信息，或者用于确定local DNS server地址，下面将结合具体实施例进行说明，这里不再赘述。
方式三，SMF基于从UPF处获得到的网络探测结果确定上述的至少一个EAS的信息。
在该方式三下，图5所示的方法流程还包括：
S521，SMF向UPF发送第三指示信息，或者说UPF接收来自UPF的第三指示信息。
该第三指示信息用于指示UPF进行网络探测确定第一EAS的状态。
可选地，UPE为L-PSA UPF，或者UPF为ULCL UPF。
需要说明的是，该第一EAS可以是上述的至少一个EAS中的任意一个。也就是说，SMF可以通过指示信息指示UPF分别确定不同的EAS的状态。
例如，SMF通过第三指示信息#1，指示UPF确定第一EAS#1的状态；SMF通过第三指示信息#2，指示UPF确定第一EAS#2的状态。其中，第一EAS#1和第一EAS#2为不同的EAS。
为了便于描述，以SMF获得某个EAS的信息为例进行说明。
示例性地，第三指示信息中包括第一EAS的IP地址。
示例性地，第三指示信息可以不包括第一EAS的IP地址，第三指示信息触发UPF进行网络探测即可。
作为一种可能的实现方式，SMF可以通过N4会话建立请求向UPF发送第三指示信息；
作为另一种可能的实现方式，SMF可以通过N4会话修改请求向UPF发送第三指示信息。
应理解，上述只是举例说明SMF可以通过怎样的方式向UPF发送该第三指示信息，对本申请的保护范围不构成任何的限定，其他SMF向UPF发送该第三指示信息的方式也在本申请的保护范围之内，例如，SMF主动向UPF发送该第三指示信息；还例如，协议预定义SMF需要向UPF发送该第三指示信息；又例如，SMF基于其他设备(如，管理设备)的指示向UPF发送该第三指示信息，这里不一一举例说明。
可选地，UPF接收到上述的第三指示信息之后，作为接收到上述的第三指示信息的响应，UPF可以向SMF发送第三回复信息，图5所示的方法流程还包括：
S522，UPF向SMF发送第三回复信息，或者说SMF接收来自UPF的第三回复信息。
可选地，在SMF通过N4会话建立请求向UPF发送第三指示信息的情况下，UPF可以通过N4会话建立回复向SMF发送第三回复信息；
可选地，在SMF通过N4会话修改请求向UPF发送第三指示信息的情况下，UPF可以通过N4会话修改回复向SMF发送第三回复信息。
应理解，上述只是举例说明UPF可以通过怎样的方式向SMF发送该第三回复信息，对本申请的保护范围不构成任何的限定，其他UPF向SMF发送该第三回复信息的方式也 在本申请的保护范围之内，这里不一一举例说明。
另外，UPF接收到上述的第三指示信息之后也可以不发送上述的第三回复信息。
具体地，UPF接收到上述的第三指示信息之后，基于该第三指示信息进行网络探测。图5所示的方法流程还包括：
S523，UPF向第一EAS发送侦测数据包，或者说第一EAS接收来自UPF的侦测数据包。
该侦测数据包用于探测第一EAS的状态。
示例性地，侦测数据包可以是Ping包、传输控制协议(transmission control protocol，TCP)端口侦测包或超文本传输协议(hyper text transfer protocol，HTTP)全球资源定位器(uniform resource locator，URL)侦测包等。
其中，在侦测数据包为Ping包的情况下，通过Ping的方式检测服务器及网络系统状况，能大致检测出网络及服务器上的操作系统是否正常；在侦测数据包为TCP端口侦测包的情况下，通过检测服务器上某个TCP端口是否开放来判断服务是否正常，如检测边缘计算服务对应的TCP端口；在侦测数据包为HTTP URL侦测包的情况下，基于内容的自动化测试原理通过向HTTP服务器发出一个对超文本标记语言(hypertext markup language，html)(如，main.html)文件的访问请求，如果收到错误信息，则认为服务器出现故障。
具体地，UPF根据第一EAS是否回复数据包，以及回复数据包中的信息，计算、判断第一EAS的状态。图5所示的方法流程还包括：
S524，UPF确定第一EAS的状态。
例如，UPF向第一EAS发出Ping包后没有收到对应的回复数据包，或者收到错误指示，则认为无法获得第一EAS(或边缘计算平台)的服务，第一EAS的状态可能为(或边缘计算平台)可能处于链路不可达状态。
还例如，UPF向第一EAS发出TCP端口侦测包后收到回复数据包表明端口不可达，表明第一EAS的状态可能为第一EAS(或对应的边缘计算服务)不可用，或者第一EAS的负载过高。
又例如，UPF向HTTP服务器发送对于main.html文件的访问请求，如果收到错误信息，认为第一EAS的状态可能为对应的第一EAS出现故障，可能处于无法提供服务的状态。
需要说明的是，上述是以UPF探测第一EAS的状态为例进行说明的，UPF还可以探测多个EAS的状态(如，UPF向多个EAS分别发送侦测数据包)，或者还可以探测某个边缘计算平台的状态(如，UPF向某个边缘计算平台中部署的EAS分别发送侦测数据包)具体探测方式与UPF确定第一EAS的状态相同，不再赘述。
进一步地，UPF需要将第一EAS的状态上报给SMF，由SMF确定第一EAS的信息，图5所示的方法流程还包括：
S525，UPF向SMF发送第二上报信息，或者说SMF接收来自UPF的第二上报信息。
该第二上报信息中包括指示第一EAS的状态的指示信息。
可选地，该第二上报信息中还可以包括第一EAS的IP地址，或者SMF本地保存有该第一EAS的IP地址无需UPF通过第一上报信息上报该第一EAS的IP地址。
可选地，UPF可以通过N4会话向SMF发送第二上报信息。
下面以第二上报信息用于确定第一EAS的信息为例进行说明，还可以根据第二上报信息确定地其他EAS的信息，例如，上述的第三指示信息指示UPF确定第一EAS#2的状态，SMF可以根据第二上报信息确定第一EAS#2的信息，确定方式与SMF确定第一EAS的信息类似，这里不再赘述。
具体地，SMF接收到上述的第二上报信息之后，基于该第二上报信息确定上述的至少一个EAS的信息。
作为一种可能的实现方式，SMF直接根据第二上报信息确定第一EAS的信息。在该实现方式下，图5所示的方法流程还包括：
S526，SMF根据第二上报信息确定至少一个EAS的信息。
示例性地，SMF根据第二上报信息确定第一EAS的信息包括：SMF根据第一EAS的状态确定第一EAS的负载状态。
示例性地，SMF根据第一上报信息确定第一EAS的信息还包括：SMF根据第一EAS的状态确定第一EAS的服务状态。
作为另一种可能的实现方式，SMF可以将接收到的第二上报信息发送给NWDAF，由NWDAF进行数据分析，确定第一EAS的信息，并将第一EAS的信息发送给SMF。在该实现方式下，图5所示的方法流程还包括：
S527，SMF向NWDAF发送第二上报信息，或者说NWDAF接收来自SMF的第二上报信息。
S528，NWDAF确定第一EAS的信息。
具体地，NWDAF基于第二上报信息进行数据分析确定第一EAS的信息。
示例性地，NWDAF根据第二上报信息确定第一EAS的信息包括：NWDAF根据第一EAS的状态确定第一EAS的负载状态。
示例性地，NWDAF根据第一上报信息确定第一EAS的信息还包括：NWDAF根据第一EAS的状态确定第一EAS的服务状态。
进一步地，NWDAF将第一EAS的信息发送给SMF，图5所示的方法流程还包括：
S529，NWDAF向SMF发送第一EAS的信息。
应理解，本申请实施例中对于如何根据第二上报信息确定至少一个EAS的信息的具体方式不做限定，能够根据UPF上报的网络探测结果确定EAS的信息的方式都在本申请的保护范围之内。
需要说明的是，方式三中SMF还可以通过目前的流程(如图2所示的流程)获得到其他的信息(如，APP的FQDN、EAS部署信息、UE位置等)，该其他的信息和上述的通过方式三获得的至少一个边缘应用服务器EAS的信息用于确定构造ECS选项的信息，或者用于确定local DNS server地址，下面将结合具体实施例进行说明，这里不再赘述。
具体地，SMF可以通过以下方式获得第一指示信息，该第一指示信息用于指示无法为所述终端装置提供服务的EAS，应理解，该无法为UE提供服务的EAS指的是已经确定出(如，UE尝试过的)的为UE提供服务的EAS。
方式四，SMF基于从UPF处获得到的DNS查询的信息确定上述的第一指示信息。
在该方式四下，图5所示的方法流程还包括：
S530，SMF向UPF发送第四指示信息，或者说UPF接收来自UPF的第四指示信息。
该第四指示信息用于指示UPF缓存来自当前需要执行EAS发现的终端装置的针对第一FQDN的DNS查询信息。
需要说明的是，来自该终端装置的针对第一FQDN的DNS查询信息可以理解为终端装置根据DNS response消息中的(如，上图2中所示的步骤S225)携带的EAS IP尝试获得边缘计算服务，结果无法获得边缘计算服务之后，重新发起的DNS查询信息。
示例性地，SMF在执行插入ULCL UPF和L-PSA UPF的流程中(如，上图2中所示的步骤S223)向UPF发送上述的第四指示信息，在执行该流程之前SMF已知第二EAS的IP地址、DNAI等信息。
可选地，SMF可以通过第四指示信息向UPF发送第二EAS的IP地址、DNAI等信息。
S531，UPF检测到DNS查询信息，并缓存该DNS查询信息。
具体地，UPF接收到UE重新发起的DNS查询信息，缓存该DNS查询信息。
S532，UPF向SMF发送第三上报信息，或者说SMF接收来自UPF的第三上报信息。
该第三上报信息中包括第一FQDN、第二EAS的IP地址、DNAI等。
可选地，在上述的第四指示信息中包括第二EAS的IP地址、DNAI等信息的情况下，该第三上报信息中还可以包括第二EAS的IP地址、DNAI等信息；或者，SMF本地保存有第二EAS的IP地址、DNAI等信息无需UPF通过第三上报信息上报该第二EAS的IP地址、DNAI等信息。
具体地，SMF接收到上述的第三上报信息之后，基于该第三上报信息确定上述的第一指示信息。
图5所示的方法流程还包括：
S533，SMF确定第一指示信息。
该第一指示信息用于指示无法为终端装置提供服务的EAS的指示信息。
需要说明的是，方式四中SMF还需要指示UPF将缓存的DNS查询信息转发至EASDF，并获得到其他的信息(如，APP的FQDN、EAS部署信息、UE位置等)，该其他的信息和上述的通过方式四获得的第一指示信息用于确定构造ECS选项的信息，或者用于确定local DNS server地址，下面将结合具体实施例进行说明，这里不再赘述。
方式五，SMF接收来自UE的第一指示信息。
在该方式五下，图5所示的方法流程还包括：
S534，UE向SMF发送第一指示信息，或者说SMF接收来自UE的第一指示信息，
该第一指示信息用于指示无法为UE提供服务的第三EAS。
例如，第一指示信息可以指示第三EAS无法提供服务；
还例如，第一指示信息可以指示无法服务的第三EAS。
示例性地，该第一指示信息中包括第三EAS的IP，该第三EAS为无法为当前执行发现EAS的终端装置提供服务的EAS。
可选地，该第一指示信息中还可以包括FQDN、定时器等。
示例性地，终端装置收到的DNS Response消息中指示的EAS无法为终端装置提供边缘计算服务，终端装置将重新发送DNS Query消息。在重新发送DNS Query消息之前， 终端装置通过NAS消息向SMF上报第一指示信息，其中包含EAS IP(DNS Response中指示的)、FQDN、定时器等。
具体地，SMF接收到上述的第一指示信息之后，基于该第一指示信息确定无法为终端装置提供边缘计算服务的第三EAS。
需要说明的是，方式五中SMF还可以通过目前的流程(如图2所示的流程)获得到其他的信息(如，APP的FQDN、EAS部署信息、UE位置等)，该其他的信息和上述的通过方式五获得的第一指示信息用于确定构造ECS选项的信息，或者用于确定local DNS server地址，下面将结合具体实施例进行说明，这里不再赘述。
另外，方式四和方式五所示的确定第一指示信息的方式，可以是在通过上述的方式一至方式三所示任意一种方式的确定EAS的信息之后执行的，例如，基于上述的方式一所示方式的确定EAS的信息之后，所选择的EAS还是无法为UE提供服务，则可以通过方式四或者方式五的方式上报无法为UE提供服务的EAS。
上述的方式一至方式三详细介绍了SMF获得EAS的信息的方式，方式四和方式五介绍了SMF获得第一指示信息的方式，在获得第一指示信息或EAS的信息之后，图5所示的方法流程还包括：
S535，SMF确定第一信息。
具体地，SMF根据获得的第一指示信息或EAS的信息确定第一信息。
或者，在获得到第一指示信息和EAS的信息之后，执行S535，也就是说SMF可以基于获得的第一指示信息和EAS的信息中的至少一个确定第一信息。
该第一信息用于确定构造ECS选项的信息，或第一信息用于本地域名系统DNS服务器地址的确定。
与上述图2中所示的确定构造ECS选项的信息，或确定本地DNS服务器地址不同的是，SMF可以根据APP的FQDN、EAS部署信息、UE位置等信息，以及获得到的第一指示信息或EAS的信息确定第一信息，该第一信息用于构造ECS选项的信息，或该第一信息用于确定本地DNS服务器地址。
示例性地，第一信息可以是用于确定构造ECS选项的信息，或用于确定本地DNS服务器地址的信息。例如，第一信息可以是DNAI，根据该DNAI确定构造ECS选项的信息，或者根据该DNAI确定本地DNS服务器地址。
示例性地，第一信息可以是ECS选项的信息，或本地DNS服务器地址。
本申请实施例中对于构造ECS选项的信息以及本地DNS服务器地址的具体形式不做限定，可以参考目前协议中的相关描述，本申请主要涉及SMF确定ECS选项的信息以及本地DNS服务器地址的流程中除了考虑目前协议中所规定的信息(如，APP的FQDN、EAS部署信息、UE位置等信息)之外，还需要考虑额外的信息(如，第一指示信息和/或EAS的信息)，从而能够避免ECS选项，或本地DNS服务器地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况。
例如，上述方式一所示的通过AF提供EAS的信息，从而使确定出的构造ECS选项的信息，或本地DNS服务器地址不会对应负载过高、或者无法提供服务的EAS，避免了服务质量下降、或者无法得到边缘计算服务的问题。
还例如，上述方式二所示的通过UPF进行数据包检测及消息上报，SMF获得EAS的 信息，从而使确定出的构造ECS选项的信息，或本地DNS服务器地址不会对应负载过高、或者无法提供服务的EAS，避免了服务质量下降、或者无法得到边缘计算服务的问题。
又例如，上述方式三所示的通过UPF进行网络探测及消息上报，SMF获得EAS的信息，从而使确定出的构造ECS选项的信息，或本地DNS服务器地址不会对应负载过高、或者无法提供服务的EAS，避免了服务质量下降、或者无法得到边缘计算服务的问题。
又例如，上述方式四所示的通过SMF指示UPF缓存DNS Query消息并进行数据上报，UPF上报给SMF的消息中包含无法为UE提供边缘计算服务的EAS信息，从而SMF在确定构造ECS选项的信息，或本地DNS服务器地址时，避开该无法提供边缘计算服务的EAS。
又例如，上述方式五所示的UE通过NAS消息向SMF上报EAS服务信息，其中包含无法为UE提供边缘计算服务的EAS信息，从而SMF在确定构造ECS选项的信息，或本地DNS服务器地址时，避开该无法提供边缘计算服务的EAS。
此外，所述会话管理功能网元根据获得的所述第一指示信息或所述边缘应用服务器的所述信息确定第一信息，还可以理解为是会话管理功能网元至少根据所述第一指示信息或所述边缘应用服务器的所述信息来确定第一信息，会话管理功能网元还可以根据图2中所示的APP的FQDN、EAS部署信息(如FQDN、IP address、DNAI对应关系)、UE位置等信息中的一种或多种信息综合确定出第一信息。
应理解，本申请实施例提供的发现边缘应用服务器的方法SMF确定构造ECS option的信息或local DNS server地址时考虑到用于指示EAS的选择权重、EAS的负载状态或EAS的服务状态的EAS的信息或用于指示无法为终端装置提供服务的EAS的第一指示信息，能够避免ECS option的信息或local DNS server地址对应的边缘计算平台或EAS负载过高，或者EAS升级服务器无法提供服务等情况，从而避免EAS的服务质量下降。
另外，在考虑了多个EAS的状态，或负载的情况下，可以选取服务质量更好的EAS，从而能够提高EAS的服务质量。
进一步地，本申请实施例提供的发现边缘应用服务器的方法SMF确定构造ECS option的信息或local DNS server地址时基于的信息不只考虑上述的用于指示EAS的选择权重、EAS的负载状态或EAS的服务状态的EAS的信息或用于指示无法为终端装置提供服务的EAS的第一指示信息，还可以包括上述图2中所示的APP的FQDN、EAS部署信息(如FQDN、IP address、DNAI对应关系)、UE位置等信息。
为了便于理解，下文将结合具体实施例详细说明本申请实施例涉及的发现EAS的流程。
图6是一种发现边缘应用服务器的方法的示意性流程图。包括以下步骤：
S610，UE发起会话建立流程。
具体地，UE启动APP发起会话建立流程或重用UE现有会话，以建立UE与UPF之间的用户面连接。
图6所示的方法中，SMF需要从AF获得EAS的信息，图6所示的方法流程还包括：
S611，AF向SMF发送EAS的信息。
该EAS的信息包括EAS(或者边缘计算平台)的选择权重、EAS(或者边缘计算平台)的负载情况、EAS(或者边缘计算平台)的服务状态等信息。
该EAS的信息具体可以参考上述的S511的描述，这里不再赘述。
可选地，SMF接收到EAS的信息可以向AF发送回复信息，以表示接收到该EAS的信息。
图6所示的方法流程还包括：
S612，SMF向AF发送回复信息。
作为一种可能的实现方式，AF可以主动向SMF发送EAS的信息。例如，在AF influence on traffic routing流程中向SMF提供EAS的信息。
作为另一种可能的实现方式，AF可以通过SMF的订阅向SMF提供EAS的信息，在该实现方式下，图6所示的方法流程还包括：
S613，SMF向AF发送订阅信息。
具体地，SMF在获得EAS部署信息时，需要获得对应的AF信息，SMF根据FQDN和UE的位置信息得到对应的DNAI，SMF向DNAI对应的AF去订阅EAS相关信息。
该订阅信息中可以携带FQDN、UE位置信息、UE标识等信息。其中，可以订阅多个FQDN和/或多个UE对应的EAS的信息，则该订阅信息中可以携带至少一个FQDN、至少一个UE位置信息或至少一个UE标识。
可选地，AF接收到订阅信息可以向SMF发送订阅回复信息，以表示接收到该订阅信息。
图6所示的方法流程还包括：
S614，AF向SMF发送订阅回复信息。
当满足通知条件时，执行上述的步骤S611，AF向SMF通知EAS的信息，其中，EAS的信息包括FQDN、UE标识、EAS(或边缘计算平台)负载情况、EAS(或边缘计算平台)服务状态等。
作为又一种可能的实现方式，AF可以通过SMF的请求向SMF提供EAS的信息，在该实现方式下，图6所示的方法流程还包括：
S615，SMF向AF发送请求信息。
具体地，SMF在获得EAS部署信息时，需要获得对应的AF信息，SMF根据FQDN和UE的位置信息得到对应的DNAI，SMF向DNAI对应的AF去请求EAS相关信息。
该请求信息中可以携带FQDN、UE位置信息、UE标识等信息。该FQDN、UE位置信息、UE标识等信息为当前需要执行EAS发现的UE相关的信息。
AF接收到请求信息之后，执行上述的步骤S611，AF向SMF回复EAS的信息，其中，EAS的信息包括FQDN、UE标识、EAS(或边缘计算平台)负载情况、EAS(或边缘计算平台)服务状态等。
需要说明的是，在SMF从AF获得EAS的信息的方式为AF主动向SMF发送，或者基于SMF的订阅的情况下，上述的步骤S611、S612、S613和S614可以在会话建立流程中执行；在SMF从AF获得EAS的信息的方式为AF主动向SMF发送，或者基于SMF的订阅的情况下，上述的步骤S611、S612和S615可以在DNS消息处理规则更新流程中执行。
进一步地，图6所示的方法流程还包括：
S616，SMF选择EASDF。
S617，SMF和EASDF交互，以建立EASDF上的DNS消息处理规则。
S618，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S619，UE向EASDF发送DNS查询信息。
S620，EASDF向SMF发送通知请求消息。
S621，SMF向EASDF发送通知响应消息。
上述的步骤S616至步骤S621，同上述图2中的步骤S212至步骤S217，这里不再赘述。
进一步地，SMF根据APP FQDN、EAS部署信息、UE位置、EAS(或者边缘计算平台)的选择权重、EAS(或者边缘计算平台)的负载情况、EAS(或者边缘计算平台)的服务状态等，确定构造ECS option的信息或local DNS server地址，图6所示的方法流程还包括：
S622，SMF确定第一信息。
可以参考上述的S535的描述，这里不再赘述。
具体地，SMF需要将根据第一信息确定得到的构造ECS选项的信息或本地DNS服务器地址发送至EASDF，图6所示的方法流程还包括：
S623，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
该DNS上下文更新请求消息中包括构造ECS选项的信息或本地DNS服务器地址。
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
进一步地，图6所示的方法流程还包括：
S624，EASDF向DNS服务器发送DNS查询信息。
S625，EASDF接收DNS server发送的DNS响应消息。
S626，EASDF向SMF发送通知请求消息。
S627，SMF向EASDF发送通知响应消息。
S628，SMF插入ULCL UPF和L-PSA。
S629，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S630，EASDF向UE发送DNS response消息。
上述的步骤S624至步骤S630，同上述图2中的步骤S219至步骤S225，这里不再赘述。
图7是另一种发现边缘应用服务器的方法的示意性流程图。包括以下步骤：
S710，UE发起会话建立流程。
S711，SMF选择EASDF。
S712，SMF和EASDF交互，以建立EASDF上的DNS消息处理规则。
S713，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S714，UE向EASDF发送DNS查询信息。
S715，EASDF向SMF发送通知请求消息。
S716，SMF向EASDF发送通知响应消息。
上述的步骤S710至步骤S716，同上述图2中的步骤S211至步骤S217，这里不再赘述。
图7所示的方法中，SMF需要基于从UPF获得的信息确定EAS的信息，图7所示的方法流程还包括：
S717，SMF向UPF发送第二指示信息。
可以参考上述的S513的描述，这里不再赘述。
S718，UPF向SMF发送第二回复信息。
可以参考上述的S514的描述，这里不再赘述。
S719，UE与EAS之间进行数据包传输。
具体地，UE与EAS之间通过UPF进行数据包传输。
可选地，该EAS为图5方式二中的第一EAS，数据包为图5方式二中的第一数据包。
S720，UPF进行数据包检测。
S721，UPF向SMF发送第一上报信息。
S722，SMF根据第一上报信息确定至少一个EAS的信息。
上述的步骤S720至步骤S722，同上述图5中的步骤S515至步骤S517，这里不再赘述。
进一步地，SMF根据APP FQDN、EAS部署信息、UE位置、EAS(或者边缘计算平台)的负载情况、EAS(或者边缘计算平台)的服务状态等，确定构造ECS option的信息或local DNS server地址，图7所示的方法流程还包括：
S723，SMF确定第一信息。
可以参考上述的S535的描述，这里不再赘述。
需要说明的是，上述的步骤S717至步骤S722是针对其他UE而执行的过程，步骤S723是针对当前执行EAS发现的UE的过程。对于当前执行EAS发的UE，在其发现EAS之后，也可以执行上述的步骤S717至步骤S722。
具体地，SMF需要将根据第一信息确定得到的构造ECS选项的信息或本地DNS服务器地址发送至EASDF，图7所示的方法流程还包括：
S724，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
该DNS上下文更新请求消息中包括构造ECS选项的信息或本地DNS服务器地址。
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
进一步地，图7所示的方法流程还包括：
S725，EASDF向DNS服务器发送DNS查询信息。
S726，EASDF接收DNS server发送的DNS响应消息。
S727，EASDF向SMF发送通知请求消息。
S728，SMF向EASDF发送通知响应消息。
S729，SMF插入ULCL UPF和L-PSA。
S730，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S731，EASDF向UE发送DNS response消息。
上述的步骤S725至步骤S731，同上述图2中的步骤S219至步骤S225，这里不再赘述。
图8是又一种发现边缘应用服务器的方法的示意性流程图。包括以下步骤：
S810，UE发起会话建立流程。
S811，SMF选择EASDF。
S812，SMF和EASDF交互，以建立EASDF上的DNS消息处理规则。
S813，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S814，UE向EASDF发送DNS查询信息。
S815，EASDF向SMF发送通知请求消息。
S816，SMF向EASDF发送通知响应消息。
上述的步骤S810至步骤S816，同上述图2中的步骤S211至步骤S217，这里不再赘述。
图8所示的方法中，SMF需要基于从UPF获得的信息确定EAS的信息，图8所示的方法流程还包括：
S817，SMF向UPF发送第三指示信息。
可以参考上述的S521的描述，这里不再赘述。
S818，UPF向SMF发送第三回复信息。
S819，UPF向EAS发送侦测数据包。
可选地，该EAS为图5方式三中的第一EAS。
S820，UPF确定EAS的状态。
S821，UPF向SMF发送第二上报信息。
S822，SMF根据第二上报信息确定至少一个EAS的信息。
上述的步骤S817至步骤S822，同上述图5中的步骤S521至步骤S526，这里不再赘述。
需要说明的是，上述的步骤S817至步骤S822是针对每个EAS而执行的过程。
进一步地，SMF根据APP FQDN、EAS部署信息、UE位置、EAS(或者边缘计算平台)的负载情况、EAS(或者边缘计算平台)的服务状态等，确定构造ECS option的信息或local DNS server地址，图8所示的方法流程还包括：
S823，SMF确定第一信息。
可以参考上述的S535的描述，这里不再赘述。
具体地，SMF需要将根据第一信息确定得到的构造ECS选项的信息或本地DNS服务器地址发送至EASDF，图8所示的方法流程还包括：
S824，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
具体地，包括：SMF向EASDF发送DNS上下文更新请求消息(例如，可以是Neasdf_DNSContext_Update Request)；
该DNS上下文更新请求消息中包括构造ECS选项的信息或本地DNS服务器地址。
EASDF向SMF发送DNS上下文更新响应消息(例如，可以是Neasdf_DNSContext_Update Response)。
进一步地，图8所示的方法流程还包括：
S825，EASDF向DNS服务器发送DNS查询信息。
S826，EASDF接收DNS server发送的DNS响应消息。
S827，EASDF向SMF发送通知请求消息。
S828，SMF向EASDF发送通知响应消息。
S829，SMF插入ULCL UPF和L-PSA。
S830，SMF和EASDF交互，以更新EASDF上的DNS消息处理规则。
S831，EASDF向UE发送DNS response消息。
上述的步骤S825至步骤S831，同上述图2中的步骤S219至步骤S225，这里不再赘述。
图9是又一种发现边缘应用服务器的方法的示意性流程图。该发现边缘应用服务器的方法基于图2所示的流程，在图2所示的流程上进行了如下修改：
在图2所示的流程中步骤S223中，指示UPF缓存来自当前需要执行EAS发现的终端装置的针对第一FQDN的DNS查询信息。图2中步骤S223之前的步骤不再赘述。
图9所示的方法流程包括以下步骤：
S910，SMF向UPF发送第四指示信息。
可以参考上述的S530的描述，这里不再赘述。
S911，UE确定无法获得第二EAS对应的边缘计算服务。
可以理解为，UE根据DNS Response中的EAS IP尝试获得边缘计算服务，结果无法获得该EAS对应的边缘计算服务。
S912，UE重新发起DNS查询信息。
S913，UPF检测到DNS查询信息，并缓存该DNS查询信息。
可以参考上述的S531的描述，这里不再赘述。
S914，UPF向SMF发送第三上报信息。
可以参考上述的S532的描述，这里不再赘述。
S915，SMF向EASDF发送第七指示信息。
该第七指示信息用于指示EASDF将原IP地址为UE IP地址、查询域名为第一FQDN的DNS查询信息上报给SMF。
示例性地，SMF通过Neasdf_DNSContext_Update服务更新EASDF中的DNS message handling rule，指示EASDF执行上述的操作。
S916，SMF向UPF发送第八指示信息。
该第八指示信息用于指示UPF将缓存的DNS查询信息转发给EASDF。
S917，UPF向EASDF发送DNS查询信息。
S918，EASDF向SMF发送DNS查询的信息，或者说SMF接收来自EASDF的DNS查询的信息。
该DNS查询的信息可以为上述的DNS查询信息中包括的部分或者全部的信息。
示例性地，EASDF根据DNS message handling rule通过Neasdf_DNSContext_Notify将DNS查询的信息上报给SMF。
S919，SMF确定第一指示信息。
可以参考上述的S533的描述，这里不再赘述。
进一步地，SMF根据APP FQDN、EAS部署信息、UE位置、UPF上报信息(如，FQDN、EAS IP(插入UL CL1/BP1时对应的EAS IP)、DNAI等)等，确定构造ECS option的信息或local DNS server地址，图9所示的方法流程还包括：
S920，SMF确定第一信息。
可以参考上述的S535的描述，这里不再赘述。
具体地，SMF需要将根据第一信息确定得到的构造ECS选项的信息或本地DNS服务器地址发送至EASDF，图9所示的方法流程还包括后续DNS查询处理流程，同上述图2中的步骤S218至步骤S225，这里不再赘述。
图10是又一种发现边缘应用服务器的方法的示意性流程图。该发现边缘应用服务器的方法基于图2所示的流程，在图2所示的流程上进行了如下修改：
S1010，UE确定无法获取第二EAS对应的边缘计算服务。
可以理解为，UE根据DNS Response中的EAS IP尝试获取边缘计算服务，结果无法获取该EAS对应的边缘计算服务。
S1011，UE向SMF发送第一指示信息。
可以参考上述的S534的描述，这里不再赘述。
S1012，SMF向EASDF发送第七指示信息。
该第七指示信息用于指示EASDF将原IP地址为UE IP地址、查询域名为第一FQDN的DNS查询信息上报给SMF。
示例性地，SMF通过Neasdf_DNSContext_Update服务更新EASDF中的DNS message handling rule，指示EASDF执行上述的操作。
可选地，SMF接收到上述的第一指示信息之后，作为接收到上述的第一指示信息的响应，SMF可以向UE发送第一回复信息，图5所示的方法流程还包括：
S1013，SMF向UE发送第一回复信息，或者说UE接收来自SMF的第一回复信息。
可选地，在SMF通过NAS消息向UE发送第一回复信息。
该第一回复信息指示UE可以重新发起DNS查询。
另外，SMF接收到上述的第一指示信息之后也可以不发送上述的第一回复信息，UE可以直接重新发起DNS查询。
S1014，UE重新发送DNS查询信息。
S1015，EASDF向SMF发送DNS查询的信息，或者说SMF接收来自EASDF的DNS查询的信息。
该DNS查询的信息可以为上述的DNS查询信息中包括的部分或者全部的信息。
示例性地，EASDF根据DNS message handling rule通过Neasdf_DNSContext_Notify将DNS查询的信息上报给SMF。
S1016，SMF确定第三EAS。
可以参考上述的S535的描述，这里不再赘述。
进一步地，SMF根据APP FQDN、EAS部署信息、UE位置、UE上报的信息(FQDN、EAS IP、DNAI等)等，确定构造ECS option的信息或local DNS server地址，图10所示的方法流程还包括：
S1017，SMF确定第一信息。
可以参考上述的S535的描述，这里不再赘述。
具体地，SMF需要将根据第一信息确定得到的构造ECS选项的信息或本地DNS服务器地址发送至EASDF，图10所示的方法流程还包括后续DNS查询处理流程，同上述图2中的步骤S218至步骤S225，这里不再赘述。
应理解，本申请实施例中的图6至图10所示的具体的例子只是为了帮助本领域技术人员更好地理解本申请实施例，而非限制本申请实施例的范围。例如，具体实施例中的流程均以发现EAS流程为例进行描述，并不限定本申请提供的用于发现边缘应用服务器的方法只能适用于EAS流程流程，其他涉及到确定构造ECS选项的信息，或确定本地域名系统DNS服务器地址的流程中也同样适用。
还应理解，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
还应理解，在上述一些实施例中，主要以现有的网络架构中的网元为例进行了示例性说明(如AF、UPF、SMF等等)，应理解，对于网元的具体形式本申请实施例不作限定。例如，在未来可以实现同样功能的网元都适用于本申请实施例。
可以理解的是，上述各个方法实施例中，由网络设备(如各个网元)实现的方法和操作，也可以由可用于网络设备的部件(例如芯片或者电路)实现。
需要说明的是，上文以本申请中的“会话”为PDU会话为例，以本申请中的“用户设备”为UE为例，对各方法进行了说明，在实际应用中，PDU会话也可以被替换为其他的会话，UE也可以被替换成其他的用户设备，本申请对此不做限定。
以上，结合图5至图10详细说明了本申请实施例提供的用于发现边缘应用服务器的方法。上述用于发现边缘应用服务器的方法主要从各个网元之间交互的角度进行了介绍。可以理解的是，各个网元，为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。
本领域技术人员应该可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
以下，结合图11至图12详细说明本申请实施例提供的用于发现边缘应用服务器的装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，部分内容不再赘述。
本申请实施例可以根据上述方法示例对发射端设备或者接收端设备进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻 辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。
图11是本申请实施例提供的装置1100的示意性框图。该装置1100包括收发单元1110和处理单元1120。收发单元1110可以实现相应的通信功能，处理单元1120用于进行数据处理。收发单元1110还可以称为通信接口或通信单元。
可选地，该装置1100还可以包括存储单元，该存储单元可以用于存储指令和/或数据，处理单元1120可以读取存储单元中的指令和/或数据，以使得装置实现前述方法实施例。
该装置1100可以用于执行上文方法实施例中网络设备(如各个网元)所执行的动作，这时，该装置1100可以为网络设备或者可配置于网络设备的部件，收发单元1110用于执行上文方法实施例中网络设备侧的收发相关的操作，处理单元1120用于执行上文方法实施例中网络设备侧的处理相关的操作。
作为一种设计，该装置1100用于执行上文方法实施例中会话管理功能网元所执行的动作。
一种可能的实现方式，收发单元1110，用于获得第一指示信息或至少一个边缘应用服务器EAS的信息，其中，该会话管理功能网元是为终端装置的会话提供服务的网元，该EAS的信息用于指示该EAS的选择权重、该EAS的负载状态或该EAS的服务状态中的至少一种，该第一指示信息用于指示无法为该终端装置提供服务的EAS；
处理单元1120，用于根据该EAS的信息或该第一指示信息确定第一信息，该第一信息用于域名系统扩展机制的客户端子网ECS选项的信息的确定，或第一信息用于本地域名系统DNS服务器地址的确定，该ECS选项的信息或该本地DNS服务器地址用于为该终端装置提供服务的EAS的确定。
另一种可能的实现方式，处理单元1120，用于获得第一指示信息或至少一个边缘应用服务器EAS的信息；
处理单元1120，用于根据该EAS的信息或该第一指示信息确定第一信息。
该装置1100可实现对应于根据本申请实施例的方法实施例中的会话管理功能网元执行的步骤或者流程，该装置1100可以包括用于执行方法实施例中的会话管理功能网元执行的方法的单元。并且，该装置1100中的各单元和上述其他操作和/或功能分别为了实现方法实施例中的会话管理功能网元中的方法实施例的相应流程。
其中，当该装置1100用于执行图5中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S512、S511、S513、S514、S516、S518、S520、S521、S522、S525、S527、S529、S530、S532和S534；处理单元1120可用于执行方法中的处理步骤，如步骤S517、S526、S533和S535。
当该装置1100用于执行图6中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S613、S614、S615、S611、S612、S617、S618、S620、S621、S623、S626、S627和S629；处理单元1120可用于执行方法中的处理步骤，如步骤S616、S622和S628。
当该装置1100用于执行图7中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S712、S713、S715、S716、S717、S718、S721、S724、S727、S728和S730；处理单元1120可用于执行方法中的处理步骤，如步骤S711、S722、S723和S729。
当该装置1100用于执行图8中的方法时，收发单元1110可用于执行方法中的收发步 骤，如步骤S812、S813、S815、S816、S817、S818、S821、S824、S827、S828和S830；处理单元1120可用于执行方法中的处理步骤，如步骤S811、S822、S823和S829。
当该装置1100用于执行图9中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S910、S914、S915、S916和S918；处理单元1120可用于执行方法中的处理步骤，如步骤S919和S920。
当该装置1100用于执行图10中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S1011、S1013、S1012和S1015；处理单元1120可用于执行方法中的处理步骤，如步骤S1016和S1017。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
作为另一种设计，该装置1100用于执行上文方法实施例中应用功能网元所执行的动作。
一种可能的实现方式，处理单元1120，用于确定至少一个边缘应用服务器EAS的信息或至少一个边缘计算平台的信息，
其中，该至少一个边缘计算平台的信息用于指示该至少一个EAS的信息，该至少一个边缘计算平台中部署有该至少一个EAS，该EAS的信息用于指示该EAS的选择权重、该EAS的负载状态或该EAS的服务状态中的至少一种；
收发单元1110，用于向会话管理功能网元发送该至少一个EAS的信息。
该装置1100可实现对应于根据本申请实施例的方法实施例中的应用功能网元执行的步骤或者流程，该装置1100可以包括用于执行方法实施例中的应用功能网元执行的方法的单元。并且，该装置1100中的各单元和上述其他操作和/或功能分别为了实现方法实施例中的应用功能网元中的方法实施例的相应流程。
其中，当该装置1100用于执行图5中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S512和S511；处理单元1120可用于执行方法中的处理步骤。
当该装置1100用于执行图6中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S613、S614、S615、S611和S612、。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
作为另一种设计，该装置1100用于执行上文方法实施例中用户面功能网元所执行的动作。
一种可能的实现方式，收发单元1110，用于接收来自会话管理功能网元的第二指示信息，该第二指示信息用于指示该用户面功能网元对第一数据包进行检测，该第一数据包的目的互联网协议IP地址为第一边缘应用服务器EAS的IP地址；
处理单元1120，用于对该第一数据包进行检测，获得该第一数据包的检测结果，该检测结果中包括该第一EAS的访问量信息和/或该第一数据包在该用户面功能网元和该第一EAS之间的传输时延信息；
收发单元1110，用于向该会话管理功能网元发送第一上报信息，该第一上报信息中包括该第一数据包的检测结果，该第一上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态。
另一种可能的实现方式，收发单元1110，用于接收来自会话管理功能网元的第三指示信息，该第三指示信息用于指示该用户面功能网元进行网络探测确定第一边缘应用服务器EAS的状态；
收发单元1110，用于向该第一EAS发送侦测数据包；
处理单元1120，用于根据该第一EAS对于该侦测数据包的响应，确定该第一EAS的状态；
收发单元1110，用于向该会话管理功能网元发送第二上报信息，该第二上报信息中包括该第一EAS的状态的指示信息，该第二上报信息用于该第一EAS的信息的确定，该第一EAS的信息用于指示该第一EAS的负载状态，和/或用于指示该第一EAS的服务状态。
又一种可能的实现方式，收发单元1110，用于接收来自会话管理功能网元的第四指示信息，该第四指示信息用于指示该用户面功能网元缓存来自该终端装置的针对第一全限定域名FQDN的DNS查询信息；
处理单元1120，用于缓存该DNS查询信息；
收发单元1110，用于向该会话管理功能网元发送第三上报信息，该第三上报信息中包括该第一FQDN，该第三上报信息用于第一指示信息的确定，该第一指示信息指示无法为该终端装置提供服务的第二EAS。
该装置1100可实现对应于根据本申请实施例的方法实施例中的用户面功能网元执行的步骤或者流程，该装置1100可以包括用于执行方法实施例中的用户面功能网元执行的方法的单元。并且，该装置1100中的各单元和上述其他操作和/或功能分别为了实现方法实施例中的用户面功能网元中的方法实施例的相应流程。
其中，当该装置1100用于执行图5中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S513、S514、S516、S521、S522、S525、S530和S532；处理单元1120可用于执行方法中的处理步骤，如步骤S515、S524和S531。
当该装置1100用于执行图7中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S717、S718和S721；处理单元1120可用于执行方法中的处理步骤，如步骤S720。
当该装置1100用于执行图8中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S817、S818、S819和S821；处理单元1120可用于执行方法中的处理步骤，如步骤S820。
当该装置1100用于执行图9中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S910、S914、S916；处理单元1120可用于执行方法中的处理步骤，如步骤S913。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
作为另一种设计，该装置1100用于执行上文方法实施例中终端装置所执行的动作。
一种可能的实现方式，处理单元1120，用于确定第一指示信息，该第一指示信息用于指示无法为该终端装置提供服务的第三EAS；
收发单元1110，用于向会话管理功能网元发送该第一指示信息。
该装置1100可实现对应于根据本申请实施例的方法实施例中的终端装置执行的步骤或者流程，该装置1100可以包括用于执行方法实施例中的终端装置执行的方法的单元。 并且，该装置1100中的各单元和上述其他操作和/或功能分别为了实现方法实施例中的终端装置中的方法实施例的相应流程。
其中，当该装置1100用于执行图5中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S534；处理单元1120可用于执行方法中的处理步骤。
当该装置1100用于执行图6中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S619和S630。
当该装置1100用于执行图7中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S714和S731。
当该装置1100用于执行图8中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S814和S831。
当该装置1100用于执行图9中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S912。
当该装置1100用于执行图10中的方法时，收发单元1110可用于执行方法中的收发步骤，如步骤S1011、S1013和S1014；处理单元1120可用于执行方法中的处理步骤，如步骤S1010。
上文实施例中的处理单元1120可以由至少一个处理器或处理器相关电路实现。收发单元1110可以由收发器或收发器相关电路实现。存储单元可以通过至少一个存储器实现。
如图12所示，本申请实施例还提供一种装置1200。该装置1200包括处理器1210，还可以包括一个或多个存储器1220。处理器1210与存储器1220耦合，存储器1220用于存储计算机程序或指令和/或数据，处理器1210用于执行存储器1220存储的计算机程序或指令和/或数据，使得上文方法实施例中的方法被执行。可选地，该装置1200包括的处理器1210为一个或多个。
可选地，该存储器1220可以与该处理器1210集成在一起，或者分离设置。
可选地，如图12所示，该装置1200还可以包括收发器1230，收发器1230用于信号的接收和/或发送。例如，处理器1210用于控制收发器1230进行信号的接收和/或发送。
作为一种方案，该装置1200用于实现上文方法实施例中由网络设备(如上述各个网元)执行的操作。
本申请实施例还提供一种装置1300，该装置1300可以是网络设备也可以是芯片。该装置1300可以用于执行上述方法实施例中由网络设备(如上述各个网元)所执行的操作。
图13示出了一种简化的结构示意图。装置1300包括1310部分以及1320部分。1310部分主要用于射频信号的收发以及射频信号与基带信号的转换；1320部分主要用于基带处理，对基站进行控制等。1310部分通常可以称为收发单元、收发机、收发电路、或者收发器等。1320部分通常是基站的控制中心，通常可以称为处理单元，用于控制基站执行上述方法实施例中接收端设备侧的处理操作。
1310部分的收发单元，也可以称为收发机或收发器等，其包括天线和射频电路，其中射频电路主要用于进行射频处理。可选地，可以将1310部分中用于实现接收功能的器件视为接收单元，将用于实现发送功能的器件视为发送单元，即1310部分包括接收单元和发送单元。接收单元也可以称为接收机、接收器、或接收电路等，发送单元可以称为发射机、发射器或者发射电路等。
1320部分可以包括一个或多个单板，每个单板可以包括一个或多个处理器和一个或多个存储器。处理器用于读取和执行存储器中的程序以实现基带处理功能以及对基站的控制。若存在多个单板，各个单板之间可以互联以增强处理能力。作为一种可选的实施方式，也可以是多个单板共用一个或多个处理器，或者是多个单板共用一个或多个存储器，或者是多个单板同时共用一个或多个处理器。
应理解，图13仅为示例而非限定，上述包括收发单元和处理单元的网络设备可以不依赖于图13所示的结构。
当该装置1300为芯片时，该芯片包括收发单元和处理单元。其中，收发单元可以是输入输出电路、通信接口；处理单元为该芯片上集成的处理器或者微处理器或者集成电路。当然装置1300还可以为一个芯片系统或处理系统，使得安装该装置1300的设备可以实现本申请实施例的方法和功能。例如，处理单元1320可以为芯片系统或处理系统中的处理电路，实现对安装了该芯片系统或处理系统的设备的控制，还可以耦合链接存储单元，调用存储单元中的指令，使得设备可以实现本申请实施例的方法和功能，收发单元1310，可以为芯片系统或处理系统中的输入输出电路，将芯片系统处理好的信息输出，或将待处理的数据或信令信息输入芯片系统进行处理。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由网络设备(如各个网元)执行的方法的计算机指令。
例如，该计算机程序被计算机执行时，使得该计算机可以实现上述方法实施例中由网络设备执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被计算机执行时使得该计算机实现上述方法实施例中由网络设备(如各个网元)执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文实施例中的网络设备(如各个网元)，如包括SMF和AF。
上述提供的任一种装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。
应理解，本申请实施例中提及的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其他通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器和/或非易失性存储器。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。例如，RAM可以用作外部高速缓存。作为示例而非限定，RAM可以包括如下多种形式：静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM， ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。
需要说明的是，当处理器为通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件时，存储器(存储模块)可以集成在处理器中。
还需要说明的是，本文描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的保护范围。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。此外，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元实现本申请提供的方案。
另外，在本申请各个实施例中的各功能单元可以集成在一个单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。例如，所述计算机可以是个人计算机，服务器，或者网络设备等。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD)等。例如，前述的可用介质可以包括但不限于：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟 悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种用于发现边缘应用服务器的方法，其特征在于，包括：
    会话管理功能网元获得至少一个边缘应用服务器的信息，
    其中，所述会话管理功能网元是为终端装置的会话提供服务的网元，所述边缘应用服务器的所述信息用于指示所述边缘应用服务器的选择权重；
    所述会话管理功能网元根据所述边缘应用服务器的所述信息确定第一信息，所述第一信息用于域名系统扩展机制的客户端子网选项的信息的确定，或用于本地域名系统服务器地址的确定，所述域名系统扩展机制的客户端子网选项的信息或所述本地域名系统服务器地址用于为所述终端装置提供服务的边缘应用服务器的确定。
  2. 根据权利要求1所述的方法，其特征在于，所述边缘应用服务器的选择权重为边缘应用对应的数据网络接入标识的选择权重。
  3. 根据权利要求1或2所述的方法，其特征在于，所述会话管理功能网元获得至少一个边缘应用服务器的所述信息包括：
    所述会话管理功能网元接收来自应用功能网元的所述至少一个边缘应用服务器的所述信息。
  4. 根据权利要求3所述的方法，其特征在于，所述至少一个边缘应用服务器的所述信息包括：至少一个边缘计算平台的信息，所述至少一个边缘计算平台的信息用于指示所述至少一个边缘应用服务器的所述信息，
    其中，所述至少一个边缘计算平台中部署有所述至少一个边缘应用服务器。
  5. 根据权利要求3或4所述的方法，其特征在于，所述方法还包括：
    所述会话管理功能网元向所述应用功能网元发送订阅信息或请求信息，所述订阅信息或请求信息用于获得所述至少一个边缘应用服务器的所述信息。
  6. 一种用于发现边缘应用服务器的方法，其特征在于，包括：
    应用功能网元确定至少一个边缘应用服务器的所述信息，
    其中，所述边缘应用服务器的所述信息用于指示所述边缘应用服务器的选择权重；
    所述应用功能网元向会话管理功能网元发送所述至少一个边缘应用服务器的所述信息。
  7. 根据权利要求6所述的方法，其特征在于，所述边缘应用服务器的选择权重为边缘应用对应的数据网络接入标识的选择权重。
  8. 根据权利要求6或7所述的方法，其特征在于，所述至少一个边缘应用服务器的所述信息包括：至少一个边缘计算平台的信息，所述至少一个边缘计算平台的信息用于指示所述至少一个边缘应用服务器的所述信息，
    其中，所述至少一个边缘计算平台中部署有所述至少一个边缘应用服务器。
  9. 根据权利要求6-8任一所述的方法，其特征在于，所述方法还包括：
    所述应用功能网元接收来自所述会话管理功能网元的订阅信息或请求信息，所述订阅信息或请求信息用于获得所述至少一个边缘应用服务器的所述信息或至少一个边缘计算平台的信息。
  10. 一种用于发现边缘应用服务器的装置，其特征在于，包括用于执行如权利要求1至5中任一项所述的方法的模块。
  11. 一种用于发现边缘应用服务器的装置，其特征在于，包括用于执行如权利要求6至9中任一项所述的方法的模块。
  12. 一种通信装置，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述存储器中存储的计算机程序，以使得所述通信装置执行权利要求1至5中任一项所述的方法。
  13. 一种通信装置，其特征在于，包括：
    存储器，用于存储计算机程序；
    处理器，用于执行所述存储器中存储的计算机程序，以使得所述通信装置执行权利要求6至9中任一项所述的方法。
  14. 一种通信系统，其特征在于，所述通信系统包括至少一个如权利要求10所述的用于发现边缘应用服务器的装置、和至少一个如权利要求11所述的用于发现边缘应用服务器的装置。
  15. 一种计算机可读存储介质，其特征在于，包括计算机指令，当所述计算机指令在被处理器运行时，使得计算机执行如权利要求1至5中任一项所述的方法。
  16. 一种计算机可读存储介质，其特征在于，包括计算机指令，当所述计算机指令在被处理器运行时，使得计算机执行如权利要求6至9中任一项所述的方法。
  17. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片系统的通信装置执行如权利要求1至5中任一项所述的方法。
  18. 一种芯片系统，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片系统的通信装置执行如权利要求6至9中任一项所述的方法。
  19. 一种用于发现边缘应用服务器的方法，其特征在于，包括：
    应用功能网元确定至少一个边缘应用服务器的所述信息，
    其中，所述边缘应用服务器的所述信息用于指示所述边缘应用服务器的选择权重；
    所述应用功能网元向会话管理功能网元发送所述至少一个边缘应用服务器的所述信息；
    所述会话管理功能网元获得所述至少一个边缘应用服务器的信息，其中，所述会话管理功能网元是为终端装置的会话提供服务的网元；
    所述会话管理功能网元根据所述边缘应用服务器的所述信息确定第一信息，所述第一信息用于域名系统扩展机制的客户端子网选项的信息的确定，或用于本地域名系统服务器地址的确定，所述域名系统扩展机制的客户端子网选项的信息或所述本地域名系统服务器地址用于为所述终端装置提供服务的边缘应用服务器的确定。
  20. 根据权利要求19所述的方法，其特征在于，所述边缘应用服务器的选择权重为边缘应用对应的数据网络接入标识的选择权重。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025237208A1 (zh) * 2024-05-17 2025-11-20 华为技术有限公司 一种通信方法、装置以及系统

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240187374A1 (en) * 2021-04-11 2024-06-06 Lenovo (Beijing) Limited Method and apparatus for improving a server discovery handling procedure
CN113795014B (zh) * 2021-08-05 2022-11-18 华为技术有限公司 发现边缘应用服务器的方法及装置
CN116319958A (zh) * 2021-12-21 2023-06-23 华为技术有限公司 通信方法和装置
CN116366659A (zh) * 2021-12-27 2023-06-30 维沃移动通信有限公司 服务器选择方法及设备
CN121865198A (zh) * 2022-01-30 2026-04-14 华为技术有限公司 设备选择的方法以及装置
EP4497233B1 (en) * 2022-03-21 2026-05-06 Sony Group Corporation Methods and devices for enabling ue to access edge service
CN116866893A (zh) * 2022-03-28 2023-10-10 华为技术有限公司 通信的方法和装置
CN116938867A (zh) * 2022-03-29 2023-10-24 中移(成都)信息通信科技有限公司 一种无线通信方法、平台、设备和存储介质
CN114945015B (zh) * 2022-05-26 2023-05-16 中国联合网络通信集团有限公司 信息获取方法、装置及存储介质
CN115499470B (zh) * 2022-09-17 2023-08-04 浙江晨泰科技股份有限公司 一种智能电表数据的存储管理方法及装置
TWI838172B (zh) * 2023-03-16 2024-04-01 中華電信股份有限公司 企業專網與邊緣應用開通管理系統、方法及其電腦可讀媒介
CN118741642A (zh) * 2023-03-31 2024-10-01 华为技术有限公司 通信方法和通信装置
US20240357323A1 (en) * 2023-04-24 2024-10-24 Nokia Technologies Oy Fifth generation core enhancements to support ad hoc and dynamic group based services for edge deployments
CN118972473A (zh) * 2023-05-15 2024-11-15 华为技术有限公司 一种通信方法及通信装置
CN119729887A (zh) * 2023-09-26 2025-03-28 华为技术有限公司 一种通信方法及装置
CN120239009A (zh) * 2023-12-29 2025-07-01 华为技术有限公司 通信方法、装置及系统
CN120321708A (zh) * 2024-01-15 2025-07-15 华为技术有限公司 一种通信方法和装置
WO2025168040A1 (zh) * 2024-02-07 2025-08-14 大唐移动通信设备有限公司 边缘应用服务器的确定方法及装置
CN120547539A (zh) * 2024-02-26 2025-08-26 华为技术有限公司 一种通信方法和装置
CN120568359A (zh) * 2024-02-29 2025-08-29 维沃移动通信有限公司 设备通信方法、装置及通信设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111343092A (zh) * 2020-03-15 2020-06-26 腾讯科技（深圳）有限公司 基于边缘计算的通信方法、装置、介质及电子设备
CN112311691A (zh) * 2019-07-26 2021-02-02 华为技术有限公司 策略控制方法、设备及系统
CN112533177A (zh) * 2019-09-19 2021-03-19 大唐移动通信设备有限公司 一种提供、发现移动边缘计算的方法及设备、装置、介质
WO2021129995A1 (en) * 2019-12-23 2021-07-01 Ntt Docomo, Inc. Session management function and method of operating a session management function
CN113132897A (zh) * 2019-12-31 2021-07-16 华为技术有限公司 应用实例确定的方法、装置及系统
CN113795014A (zh) * 2021-08-05 2021-12-14 华为技术有限公司 发现边缘应用服务器的方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8156214B2 (en) * 2009-12-22 2012-04-10 At&T Intellectual Property I, Lp System and method to discover clients associated with local domain name server using sampling
US10531420B2 (en) * 2017-01-05 2020-01-07 Huawei Technologies Co., Ltd. Systems and methods for application-friendly protocol data unit (PDU) session management
CN112422701B (zh) * 2019-08-20 2022-05-24 华为技术有限公司 域名系统查询的方法和通信装置
CN112437104B (zh) * 2019-08-26 2022-04-15 阿里巴巴集团控股有限公司 服务质量管理的方法及装置、通信系统
EP4038941A1 (en) * 2019-10-04 2022-08-10 Telefonaktiebolaget LM Ericsson (publ) Method for identification of traffic suitable for edge breakout and for traffic steering in a mobile network
WO2022041205A1 (zh) * 2020-08-31 2022-03-03 华为技术有限公司 通信方法及多接入边缘计算服务器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112311691A (zh) * 2019-07-26 2021-02-02 华为技术有限公司 策略控制方法、设备及系统
CN112533177A (zh) * 2019-09-19 2021-03-19 大唐移动通信设备有限公司 一种提供、发现移动边缘计算的方法及设备、装置、介质
WO2021129995A1 (en) * 2019-12-23 2021-07-01 Ntt Docomo, Inc. Session management function and method of operating a session management function
CN113132897A (zh) * 2019-12-31 2021-07-16 华为技术有限公司 应用实例确定的方法、装置及系统
CN111343092A (zh) * 2020-03-15 2020-06-26 腾讯科技（深圳）有限公司 基于边缘计算的通信方法、装置、介质及电子设备
CN113795014A (zh) * 2021-08-05 2021-12-14 华为技术有限公司 发现边缘应用服务器的方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Addressing ENs on SMF obtaining DNS information from AF", 3GPP DRAFT; S2-2102493, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. SA WG2, no. e-meeting; 20210412 - 20210416, 6 April 2021 (2021-04-06), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051993869 *
See also references of EP4366346A4

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025237208A1 (zh) * 2024-05-17 2025-11-20 华为技术有限公司 一种通信方法、装置以及系统

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