WO2018141266A1 - 一种路由方法和装置 - Google Patents

一种路由方法和装置 Download PDF

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Publication number
WO2018141266A1
WO2018141266A1 PCT/CN2018/075119 CN2018075119W WO2018141266A1 WO 2018141266 A1 WO2018141266 A1 WO 2018141266A1 CN 2018075119 W CN2018075119 W CN 2018075119W WO 2018141266 A1 WO2018141266 A1 WO 2018141266A1
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WIPO (PCT)
Prior art keywords
message
routing
smf
information
amf
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PCT/CN2018/075119
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English (en)
French (fr)
Inventor
侯云静
张娟
王胡成
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to EP18747628.8A priority Critical patent/EP3579657A4/en
Priority to JP2019542386A priority patent/JP6826207B2/ja
Priority to US16/483,643 priority patent/US11612006B2/en
Priority to KR1020197023773A priority patent/KR102246978B1/ko
Publication of WO2018141266A1 publication Critical patent/WO2018141266A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H04L45/025—Updating only a limited number of routers, e.g. fish-eye update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H04L45/304—Route determination for signalling traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]

Definitions

  • the embodiments of the present disclosure relate to the field of communications technologies, and in particular, to a routing method and apparatus.
  • the Session Management Function only sends Session Management (SM) information to the Access and Mobility Management Function (AMF), and the AMF does not parse the information. . Therefore, there may be a technical problem that when the radio access network (Radio Access Network, (R) AN) returns a reply message, the AMF cannot route the reply message.
  • R Radio Access Network
  • the embodiments of the present disclosure provide a routing method and apparatus for solving the technical problem that the AMF cannot route the SM related information sent by the (R) AN.
  • a routing method including:
  • the access and mobility management function AMF receives a first message sent by the radio access network (R) AN, the first message including session related information and routing information associated with the session related information;
  • the AMF routes the session related information to the correct session management function SMF according to the routing information.
  • the routing method further includes:
  • the AMF sends a second message to the (R) AN, the second message including session related information and routing information associated with the session related information, wherein the first message is the second message Confirm the message.
  • the AMF sends a second message to the (R)AN, including:
  • the AMF merges the session related information received from the plurality of SMFs into a second message, and carries the routing information associated with each session related information in the second message;
  • the AMF sends the second message to the (R)AN.
  • the AMF routing the session related information to a correct session management function SMF, including:
  • the AMF When the AMF receives the first message sent by the (R) AN to confirm the second message, the AMF determines a correct SMF according to routing information associated with the session related information, and sends the SMF to the SMF. Sentence related information.
  • the routing information is any one or more of a PDU session ID, an AMF assigned identifier, and an SMF information.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • the routing method further includes:
  • the AMF stores a routing relationship between the routing information and an SMF corresponding to the routing information.
  • a routing method including:
  • the radio access network (R) AN sends a first message to the access and mobility management function AMF, where the first message includes session related information and routing information associated with the session related information, the routing information is used for The AMF routes the session related information to the correct session management function SMF.
  • the method before the (R)AN sends the first message to the AMF, the method further includes:
  • the routing information is any one or more of a PDU session ID, an AMF assigned identifier, and an SMF information.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • a routing apparatus including:
  • a first receiving module configured to receive a first message sent by a radio access network (R) AN, where the first message includes session related information and routing information associated with the session related information;
  • R radio access network
  • a routing module configured to route the session related information to a correct session management function SMF according to the routing information.
  • the routing device further includes:
  • a first sending module configured to send, to the (R) AN, a second message, where the second message includes session related information and routing information associated with the session related information, where the first message is A confirmation message for the second message.
  • the first sending module is further configured to: merge the session related information received from the multiple SMFs into a second message, and carry the information related to each session in the second message. Routing information; sending the second message to the (R)AN.
  • the first sending module is further configured to:
  • the routing information is any one or more of a PDU session ID, an AMF assigned identifier, and an SMF information.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • the routing device further includes:
  • a storage module configured to store a routing relationship between the routing information and an SMF corresponding to the routing information.
  • a routing apparatus including:
  • a second sending module configured to send a first message to the access and mobility management function AMF, where the first message includes session related information and routing information associated with the session related information, where the routing information is used by the The AMF routes the session related information to the correct session management function SMF.
  • the routing device further includes:
  • a second receiving module configured to receive a second message sent by the AMF, where the second message includes session related information and routing information associated with the session related information, where the first message is the second A confirmation message for the message.
  • the routing information is any one or more of a PDU session ID, an AMF assigned identifier, and an SMF information.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • an AMF device comprising: a processor, a memory, and a computer program stored on the memory and operable on the processor, the computer program The steps in the routing method described in the first aspect are implemented when executed by the processor.
  • an (R)AN device comprising: a processor, a memory, and a computer program stored on the memory and executable on the processor, The steps in the routing method described in the second aspect are implemented when the computer program is executed by the processor.
  • a computer readable storage medium having stored thereon a computer program, the computer program being executed by a processor to implement the first The steps in the routing method described in the aspects.
  • a computer readable storage medium having stored thereon a computer program, the computer program being implemented by a processor in a second The steps in the routing method described in the aspects.
  • the AMF receives a first message sent by the (R) AN, where the first message includes session related information and routing information associated with the session related information;
  • the AMF routes session-related information to the correct SMF based on the routing information, enabling the correct routing of session-related information between the (R)AN and the SMF.
  • FIG. 1 is a schematic diagram of a service request process initiated by a UE
  • Embodiment 3 is a flowchart of a routing method in Embodiment 2 of the present disclosure.
  • FIG. 4 is a schematic diagram of a signaling process when routing information is a PDU session ID in Embodiment 3 of the present disclosure
  • FIG. 5 is a schematic diagram of a signaling process when routing information is information of an SMF according to Embodiment 4 of the present disclosure
  • FIG. 6 is a schematic diagram of a process when route information is an AMF-assigned identifier in Embodiment 5 of the present disclosure
  • FIG. 7 is a schematic diagram of a process of AMF merging or splitting SM information and completing message routing when an AMF receives SM information from multiple SMFs serving a UE in Embodiment 6 of the present disclosure
  • Figure 8 is a block diagram of a routing device in Embodiment 7 of the present disclosure.
  • Figure 9 is a block diagram of a routing device in Embodiment 8 of the present disclosure.
  • Figure 10 is a block diagram of a routing device in Embodiment 9 of the present disclosure.
  • Figure 11 is a block diagram of a routing device in the tenth embodiment of the present disclosure.
  • FIG. 1 a schematic diagram of a service request initiated by a UE is shown. The specific steps are as follows:
  • Step 1 The UE sends an MM NAS service request message to the (R) AN.
  • the message parameters are a PDU (Protocol Data Unit) session ID (identification), a security parameter, and a PDU session state.
  • the UE encapsulates the NAS (Non-Access Stratum) message in an RRC (Radio Resource Control) message and sends it to the (R)AN ((Radio) Access Network, Radio Access Network).
  • the parameters of the RRC message include a temporary identity and a NAS message. If the trigger condition for the UE to perform the service request is the user data generated by the upper layer, the UE includes a PDU session ID in the NAS service request message, where the PDU session ID is used to indicate the PDU session that the UE wishes to activate.
  • the UE does not need to send a PDU session ID.
  • the process is initiated by the UE under the trigger of the paging message, if the UE needs to activate the PDU session, the UE includes the PDU session ID in the NAS session request message to indicate the PDU session that it wishes to activate. Otherwise, the UE does not include any PDU session ID.
  • the PDU session status indicates the PDU session available in the UE.
  • Step 2 The (R)AN sends an N2 message to the AMF (Access and Mobility Management Function).
  • the message parameters are NAS service request, temporary ID, location information, RAT (Radio Access Technologies) type, and RRC establishment. the reason.
  • the (R)AN selects the AMF according to the temporary ID, and the location information and the RAT type are related to the cell in which the UE camps.
  • Step 3 If the service request fails the integrity protection or the integrity protection check fails, the AMF initiates the NAS authentication/security process. If the UE wishes to establish a signaling connection, after the security interaction ends, the UE may send the uplink signaling without performing the subsequent steps of the process.
  • Step 4 includes the following two steps:
  • Step 4a (Optional) The AMF sends an N11 message to the SMF (Session Management Function), and the message parameter is a PDU session ID.
  • SMF Session Management Function
  • Step 4b (Optional) The SMF sends an N11 message to the AMF, where the message parameter is N2SM information, and the information includes a QoS (Quality of Service) attribute and a CN N3 tunnel information.
  • the SMF receives the message in step 4a, it sends an N11 message to the AMF to establish the user plane of the PDU session.
  • the N2SM information includes information that the AMF needs to provide to the (R)AN.
  • Step 5 (Optional) The AMF sends an N2 request message to the (R) AN.
  • the message parameters are N2SM information received from the SMF, security context, AMF signaling connection ID, handover restriction list, and NAS service acceptance.
  • the (R)AN stores the security context, the AMF signaling connection ID, the QoS information of the QoS flow of the activated PDU session, and the N3 tunnel ID in the context of the UE.
  • the NAS service accept message includes the PDU session status in the AMF.
  • Step 6 The (R)AN performs an RRC connection reconfiguration procedure according to the QoS information of the QoS flow of the activated PDU session.
  • the AN sends a NAS service accept message to the UE.
  • the UE deletes the context of the PDU session that is not activated by the core network.
  • Step 7 After the user plane radio resource is established, the uplink data sent by the UE may be sent to the (R)AN.
  • the (R)AN transmits the above data to the UPF included in the step 4.
  • Step 8 The (R)AN sends an N2 Request Acknowledgement message to the AMF, the message parameters including N2SM information including (R) AN tunnel information, an accepted QoS flow of the activated PDU session, and an activated PDU session The rejected QoS flow. If the AMF sends an N2 message in step 5, then the N2SM message can be returned using a separate N2SM message.
  • Step 9 The AMF sends an N11 message to the SMF for each accepted PDU session, the message including the N2SM information and the RAT type.
  • the N2SM information includes (R)AN tunnel information.
  • Step 10 If dynamic PCC (Policy Control and Accounting) is deployed, the SMF may initiate an IP-CAN session modification process to provide new location information to the PCF.
  • IP-CAN session modification process to provide new location information to the PCF.
  • Step 11 including the following two steps
  • Step 11a (Optional) The SMF sends an N4 session update request to the UPF, where the message parameter is (R) AN tunnel information. If a user plane needs to be established or updated, the SMF initiates an N4 session modification process and provides (R) AN tunnel information.
  • Step 11b (optional) the UPF sends an N4 session update reply to the SMF.
  • Step 12 The SMF sends an N11 message confirmation message to the AMF.
  • FIG. 2 a routing method is shown, and the specific steps are as follows:
  • Step 201 The first message sent by the AMF to the (R)AN, where the first message includes session related information and routing information associated with the session related information.
  • the above AMF is an access management function, or may also be referred to as an access management function entity.
  • the session related information may be session management information, such as N2SM information.
  • the routing information may also be referred to as association information, and may be any one or more of a PDU session ID, an AMF-assigned identifier, and an SMF.
  • association information causes the AMF to associate the response to the correct SMF (ie, the relevant SMF).
  • the correct SMF refers to, for example, a related SMF that can process N2SM information.
  • the disclosure is not limited thereto.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information, which can be referred to the implementation that is subsequently provided.
  • Example 5 the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information, which can be referred to the implementation that is subsequently provided. Example 5.
  • the information of the SMF may be any one or more of an identifier of the SMF, an FQDN of the SMF (full name domain name), an IP address of the SMF, and a TEID (Tunnel Endpoint ID) of the SMF.
  • Step 202 The AMF routes the session related information to a correct SMF (ie, a related SMF) according to the routing information.
  • a correct SMF ie, a related SMF
  • the above SMF is a session management function, or may also be referred to as a session management function entity.
  • the method further includes: the AMF sending the second message to the (R) AN, where the second message includes the session Correlation information and routing information associated with the session related information, wherein the first message is an acknowledgement message of the second message. See, for example, step 402 of FIG. 4, step 502 of FIG.
  • the step of the AMF sending the second message to the (R) AN may include: the AMF merges the session related information received from the multiple SMFs into a second message, where The second message carries routing information associated with each session related information; the AMF sends the second message to the (R) AN, for example, see step 702 of FIG.
  • step 202 (ie, the AMF routing the session related information to the correct SMF (ie, related SMF) according to the routing information) includes: when the AMF receives the (R) When the first message sent by the AN confirms the second message, the AMF determines a correct SMF according to the routing information associated with the session related information, and sends the session related information to the SMF.
  • the method further includes:
  • the AMF stores a routing relationship between the routing information and an SMF corresponding to the routing information.
  • the information related to the session is correctly routed between the (R)AN and the SMF through the above steps 201 to 202.
  • Step 301 The (R)AN sends a first message to the AMF, where the first message includes session related information and routing information associated with the session related information, where the routing information is used by the AMF to associate the session. The information is routed to the correct SMF.
  • the above AMF is an access management function, or may also be referred to as an access management function entity.
  • the session related information may be session management information, such as N2SM information.
  • the above routing information is any one or more of a PDU session ID, an AMF assigned identifier, and an SMF information.
  • the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information, which can be referred to the implementation that is subsequently provided.
  • Example 5 the identifier allocated by the AMF is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information, which can be referred to the implementation that is subsequently provided. Example 5.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • the method further includes: (R) the AN receiving the second message sent by the AMF, where the second message includes session related information. And routing information associated with the session related information, wherein the first message is an acknowledgement message of the second message.
  • This embodiment describes a signaling procedure when routing information is a PDU session ID.
  • FIG. 4 a schematic diagram of a routing process is shown, and the specific steps are as follows:
  • Step 401 The SMF sends an N11 message to the AMF, where the N11 message includes the N2SM information and the PDU session ID.
  • Step 402 The AMF sends an N2 request message to the (R) AN, where the N2 request message includes the N2SM information and the PDU session ID.
  • Step 403 The (R)AN returns an N2 request confirmation message to the AMF, where the N2 request confirmation message includes the N2SM information and the PDU session ID.
  • Step 404 The AMF searches for the context of the UE according to the PDU session ID, and finds the related SMF, and then sends an N11 message to the SMF, where the N11 message includes the N2SM information.
  • This embodiment describes a signaling procedure when routing information is information of an SMF.
  • FIG. 5 a schematic diagram of a routing process is shown, and the specific steps are as follows:
  • Step 501 The SMF sends an N11 message to the AMF, where the N11 message includes the N2SM information.
  • Step 502 The AMF sends an N2 request message to the (R) AN, where the N2 request message includes information of the N2SM information and the SMF.
  • the information of the SMF may be the identifier or IP address of the SMF, and is of course not limited thereto.
  • Step 503 The (R)AN returns an N2 request confirmation message to the AMF, where the N2 request confirmation message includes information of the N2SM information and the SMF.
  • Step 504 The AMF sends an N11 message to the SMF according to the information of the SMF, where the N11 message includes the N2SM information.
  • This embodiment describes the process when the routing information is the identifier assigned by the AMF.
  • FIG. 6 a schematic diagram of a routing process is shown, and the specific steps are as follows:
  • Step 601 The SMF sends an N11 message to the AMF, where the N11 message includes the N2SM information.
  • Step 602 The AMF allocates a temporary identifier, locally stores the mapping relationship between the temporary identifier and the received N11 message, and then sends an N2 request message to the (R) AN, where the N2 request message includes the N2SM information and the identifier allocated by the AMF.
  • Step 603 The (R)AN returns an N2 request confirmation message to the AMF, where the N2 request confirmation message includes the N2SM information and the identifier allocated by the AMF.
  • Step 604 The AMF finds an N11 message related to the identifier according to the identifier allocated by the AMF, and the AMF generates a reply message related to the N11 message, and sends an N11 message to the SMF, where the N11 message includes the N2SM information.
  • the information related to the session is correctly routed between the (R)AN and the SMF.
  • This embodiment describes a process in which the AMF merges or splits the SM information and completes the message routing when the AMF receives the SM information from a plurality of SMFs serving the UE.
  • FIG. 7 a schematic diagram of a routing process is shown, and the specific steps are as follows:
  • Step 701a The AMF receives the N11 message from the SMF1, and the message parameter is N2SM information 1.
  • Step 701b The AMF receives the N11 message from the SMF2, and the message parameter is N2SM information 2.
  • Step 702 The AMF forms an N2 request message, where the N2 request message carries the N2SM information 1, the routing information of the information 1 (that is, the routing information 1), the N2SM information 2, and the information 2 Routing information (ie routing information 2).
  • the AMF sends an N2 request message to the (R)AN.
  • Step 703 The (R)AN processes each N2SM information in the request message and forms corresponding reply information. Then, an N2 request confirmation message is sent to the AMF, and the message parameters include N2SM information 1, routing information of information 1 (ie, routing information 1), N2SM information 2, and routing information of information 2 (ie, routing information 2).
  • Step 704 After receiving the N2 request confirmation message returned by the (R)AN, the AMF determines, according to the route information in the ⁇ N2SM information, routing information> information pair, which SMF needs to send the N2SM information, and then sends the S2 to the SMF.
  • the N11 message carries the N2SM information returned by the (R)AN.
  • the above process may occur in the service request process. For example, when the UE carries multiple PDU session IDs in the service request message, if the service SMFs of the PDU sessions are different, the AMF needs to trigger the user plane connection of the multiple SMFs to activate the corresponding PDU session. . In this process, the AMF can receive N11 messages from different SMFs, and the time at which the AMF receives these N11 messages is almost the same.
  • a routing device is further provided in the embodiment of the present disclosure.
  • the routing device is similar to the routing method in FIG. 2 and FIG. 4 to FIG. 7 according to the embodiment of the present disclosure.
  • the implementation can be referred to the implementation of the method, and the repetition is not described.
  • routing device 800 comprising:
  • the first receiving module 801 is configured to receive a first message sent by a radio access network (R) AN, where the first message includes session related information and routing information associated with the session related information;
  • R radio access network
  • the routing module 802 is configured to route the session related information to the correct session management function SMF according to the routing information.
  • the routing device further includes:
  • a first sending module configured to send, to the (R) AN, a second message, where the second message includes session related information and routing information associated with the session related information, where the first message is A confirmation message for the second message.
  • the first sending module is further configured to: combine the session related information received from the multiple SMFs into one second message, and carry the same in the second message. Routing information associated with each session related information; transmitting the second message to the (R)AN.
  • the first sending module is further configured to:
  • the routing information is any one or more of a PDU session ID, an AMF-assigned identifier, and an SMF information.
  • the identifier of the AMF allocation is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • the routing device further includes:
  • a storage module configured to store a routing relationship between the routing information and an SMF corresponding to the routing information.
  • a routing device is further provided in the embodiment of the present disclosure.
  • the principle of the routing device is similar to the routing method in the embodiments of the present disclosure, and the implementation of the routing device may be implemented. See the implementation of the method, and the repetitions are not repeated.
  • routing device 900 comprising:
  • a second sending module 901 configured to send a first message to the access and mobility management function AMF, where the first message includes session related information and routing information associated with the session related information, where the routing information is used
  • the AMF routes the session related information to the correct session management function SMF.
  • the routing device further includes:
  • a second receiving module (not shown), configured to receive a second message sent by the AMF, where the second message includes session related information and routing information associated with the session related information, where the first message Is a confirmation message of the second message.
  • the routing information is any one or more of a PDU session ID, an AMF-assigned identifier, and an SMF information.
  • the identifier of the AMF allocation is a temporary identifier corresponding to the session related information that is allocated when the AMF receives the third message sent by the SMF, and the third message includes session related information.
  • the information of the SMF is any one or more of an identifier of the SMF, a full-name domain name FQDN of the SMF, an IP address of the SMF, and a tunnel endpoint identifier TEID of the SMF.
  • a routing device is further provided in the embodiment of the present disclosure.
  • the routing device is similar to the routing method in FIG. 2 and FIG. 4 to FIG. 7 according to the embodiment of the present disclosure.
  • the implementation can be referred to the implementation of the method, and the repetition is not described.
  • an embodiment of the present disclosure provides a routing apparatus, including:
  • the first processor 1004 is configured to read a program in the first memory 1005 and perform the following process:
  • the first transceiver 1001 is configured to receive and transmit data under the control of the first processor 1004.
  • a bus architecture can include any number of interconnected buses and bridges, and first bus 1000 will include one or more processors and first represented by first processor 1004.
  • the various circuits of the memory represented by memory 1005 are linked together.
  • the first bus 1000 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art, and therefore, will not be further described herein.
  • the first bus interface 1003 provides an interface between the first bus 1000 and the first transceiver 1001.
  • the first transceiver 1001 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the first processor 1004 is transmitted over the wireless medium through the first transceiver 1001 and the first antenna 1002. Further, the first antenna 1002 also receives data and transmits the data to the first processing via the first transceiver 1001. 1004.
  • the first processor 1004 is responsible for managing the first bus 1000 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the first memory 1005 can be used to store data used by the first processor 1004 in performing operations.
  • the first processor 1004 may be a CPU, an ASIC, an FPGA, or a CPLD.
  • the first processor 1004 is specifically configured to send, to the (R) AN, a second message, where the second message includes session related information and routing information associated with the session related information, where A message is an acknowledgement message for the second message.
  • the first processor 1004 is specifically configured to merge the session related information received from the multiple SMFs into a second message, where the second message carries a route associated with each session related information. Information; transmitting the second message to the (R)AN.
  • the first processor 1004 is specifically configured to: when receiving the first message sent by the (R) AN to confirm the second message, determine a correct SMF according to routing information associated with the session related information, and Sending the session related information to the SMF.
  • the first processor 1004 is specifically configured to store a routing relationship between the routing information and an SMF corresponding to the routing information.
  • a routing device is further provided in the embodiment of the present disclosure.
  • the principle of the routing device is similar to the routing method in the embodiments of the present disclosure, and the implementation of the routing device may be implemented. See the implementation of the method, and the repetitions are not repeated.
  • an embodiment of the present disclosure provides a routing apparatus, including:
  • the second processor 1104 is configured to read the program in the second memory 1105 and perform the following process:
  • the second transceiver 1101 is configured to receive and transmit data under the control of the second processor 1104.
  • the bus architecture (represented by the second bus 1100) may include any number of interconnected buses and bridges, and the second bus 1100 will include one or more processors and seconds represented by the second processor 1104.
  • the various circuits of the memory represented by memory 1105 are linked together.
  • the second bus 1100 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • the second bus interface 1103 provides an interface between the second bus 1100 and the second transceiver 1101.
  • the second transceiver 1101 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the second processor 1104 is transmitted over the wireless medium by the second transceiver 1101 and the second antenna 1102. Further, the second antenna 1102 also receives the data and transmits the data to the second processing via the second transceiver 1101. 1104.
  • the second processor 1104 is responsible for managing the second bus 1100 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the second memory 1105 can be used to store data used by the second processor 1104 when performing operations.
  • the second processor 1104 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the second processor 1104 is specifically configured to receive the second message sent by the AMF, where the second message includes session related information and routing information associated with the session related information, where the first message Is a confirmation message of the second message.
  • system and “network” are used interchangeably herein.
  • B corresponding to A means that B is associated with A, and B can be determined from A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed method and apparatus may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

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Abstract

本公开文本实施例提供了一种路由方法和装置。该路由方法包括：AMF接收(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；所述AMF根据所述路由信息将所述会话相关信息路由至正确的SMF，实现了在(R)AN和SMF之间正确路由与会话相关的信息。

Description

一种路由方法和装置
相关申请的交叉引用
本申请主张在2017年2月6日在中国提交的中国专利申请号No.201710065501.1的优先权，其全部内容通过引用包含于此。
技术领域
本公开文本实施例涉及通信技术领域，尤其涉及一种路由方法和装置。
背景技术
在现有方案中，会话管理功能(Session Management Function，SMF)只向接入和移动性管理功能(Access and Mobility Management Function，AMF)发送会话管理(Session Management，SM)信息，AMF不解析该信息。因此，可能存在如下技术问题，即当无线接入网((Radio)Access Network，(R)AN)返回回复消息时，造成AMF无法路由该回复消息。
因此，在现有方案中，需要尽快提出一种可行方案，至少部分地解决或改善如上提及的技术问题。
发明内容
鉴于上述技术问题，本公开文本实施例提供一种路由方法和装置，解决AMF无法路由(R)AN发出的SM相关的信息的技术问题。
依据本公开文本实施例的一个方面，提供了一种路由方法，包括：
接入和移动性管理功能AMF接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；以及
所述AMF根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
可选地，在接入和移动性管理功能AMF接收无线接入网(R)AN发送的第一消息之前，所述路由方法还包括：
所述AMF向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
可选地，所述AMF向所述(R)AN发送第二消息，包括：
所述AMF将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；以及
所述AMF向所述(R)AN发送所述第二消息。
可选地，所述AMF根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF，包括：
当所述AMF接收到所述(R)AN发送的确认所述第二消息的第一消息时，所述AMF根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
可选地，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
可选地，所述路由方法还包括：
所述AMF存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
依据本公开文本实施例的第二个方面，还提供了一种路由方法，包括：
无线接入网(R)AN向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能SMF。
可选地，在(R)AN向AMF发送第一消息之前，所述方法还包括：
所述(R)AN接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
可选地，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
依据本公开文本实施例的第三个方面，还提供了一种路由装置，包括：
第一接收模块，用于接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；以及
路由模块，用于根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
可选地，所述路由装置还包括：
第一发送模块，用于向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
可选地，所述第一发送模块进一步用于：将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；向所述(R)AN发送所述第二消息。
可选地，所述第一发送模块进一步用于：
当接收到所述(R)AN发送的确认所述第二消息的第一消息时，根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
可选地，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
可选地，所述路由装置还包括：
存储模块，用于存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
依据本公开文本实施例的第四个方面，还提供了一种路由装置，包括：
第二发送模块，用于向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能SMF。
可选地，所述路由装置还包括：
第二接收模块，用于接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
可选地，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
依据本公开文本实施例的第五个方面，还提供了一种AMF设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现在第一个方面中所述的路由方法中的步骤。
依据本公开文本实施例的第六个方面，还提供了一种(R)AN设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现在第二个方面中所述的路由方法中的步骤。
依据本公开文本实施例的第七个方面，还提供了一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现在第一个方面中所述的路由方法中的步骤。
依据本公开文本实施例的第八个方面，还提供了一种计算机可读存储介 质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现在第二个方面中所述的路由方法中的步骤。
上述技术方案中的一个技术方案具有如下优点或有益效果：AMF接收(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；然后AMF根据路由信息将会话相关信息路由至正确的SMF，实现了在(R)AN和SMF之间正确路由与会话相关的信息。
附图说明
为了更清楚地说明本公开文本实施例或现有技术中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开文本的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为UE发起的service request过程的示意图；
图2为本公开文本实施例一中路由方法的流程图；
图3为本公开文本实施例二中路由方法的流程图；
图4为本公开文本实施例三中路由信息是PDU会话ID时的信令过程示意图；
图5为本公开文本实施例四中路由信息是SMF的信息时的信令过程示意图；
图6为本公开文本实施例五中路由信息是AMF分配的标识时的过程示意图；
图7为本公开文本实施例六中当AMF从为UE提供服务的多个SMF接收到SM信息时，AMF合并或拆分SM信息并完成消息路由的过程示意图；
图8为本公开文本实施例七中路由装置的框图；
图9为本公开文本实施例八中路由装置的框图；
图10本公开文本实施例九中路由装置的框图；以及
图11本公开文本实施例十中路由装置的框图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
实施例一
首先，参见图1，图中示出了UE发起的service request(业务请求)过程的示意图，具体步骤如下：
步骤1、UE向(R)AN发送MM NAS业务请求消息，消息参数为PDU(Protocol Data Unit，协议数据单元)会话ID(标识)，安全参数，PDU会话状态。UE将该NAS(非接入层)消息封装在RRC(Radio Resource Control，无线资源控制)消息中，并发送给(R)AN((Radio)Access Network，无线接入网)。该RRC消息的参数包括临时标识和NAS消息。如果UE执行业务请求的触发条件是上层产生的用户数据，UE在NAS业务请求消息中包括PDU会话ID，该PDU会话ID用于表明UE希望激活的PDU会话。如果UE只建立信令连接，则UE不需要发送PDU会话ID。当该过程是UE在寻呼消息的触发下发起时，如果UE需要激活PDU会话，UE在NAS会话请求消息中包括PDU会话ID，以表明其希望激活的PDU会话。否则，UE不包括任何PDU会话ID。PDU会话状态表明UE中可用的PDU会话。
步骤2、(R)AN向AMF(接入和移动性管理功能)发送N2消息，消息参数为NAS业务请求，临时ID，位置信息，RAT(Radio Access Technologies，无线接入技术)类型，RRC建立原因。(R)AN根据临时ID选择AMF，位置信息和RAT类型与UE驻留的小区相关。
步骤3、如果业务请求未经过完整性保护或完整性保护检查失败，AMF发起NAS认证/安全过程。如果UE希望建立信令连接，则安全交互结束之后，UE可发送上行信令，不需要继续执行该过程的后续步骤。
步骤4包括下述2个步骤：
步骤4a、(可选)AMF向SMF(Session Management Function，会话管理功能)发送N11消息，消息参数为PDU会话ID。
步骤4b、(可选)SMF向AMF发送N11消息，消息参数为N2SM信息， 该信息包括QoS(Quality of Service，服务质量)属性，CN N3隧道信息。当SMF接收到步骤4a中的消息后，其向AMF发送N11消息，以建立PDU会话的用户面。N2SM信息包括的是需要AMF提供给(R)AN的信息。
步骤5、(可选)AMF向(R)AN发送N2请求消息，消息参数为从SMF接收到的N2SM信息，安全上下文，AMF信令连接ID，切换限制列表和NAS业务接受。(R)AN在UE的上下文中存储安全上下文，AMF信令连接ID，被激活的PDU会话的QoS流的QoS信息和N3隧道ID。NAS业务接受消息中包括AMF中的PDU会话状态。
步骤6、(R)AN根据被激活PDU会话的QoS流的QoS信息执行RRC连接重配过程。(R)AN将NAS业务接受消息发送给UE。UE删除核心网未激活的PDU会话的上下文。
步骤7、当用户面无线资源建立之后，UE发出的上行数据可被发送至(R)AN。(R)AN将上述数据发送至步骤4中包括的UPF。
步骤8、(可选)(R)AN向AMF发送N2请求确认消息，消息参数包括N2SM信息，该信息包括(R)AN隧道信息，激活的PDU会话的被接受的QoS流，激活的PDU会话的被拒绝的QoS流。如果AMF在步骤5分别发送了N2消息，则可使用独立的N2SM消息返回N2SM信息。
步骤9、(可选)AMF针对每条被接受的PDU会话向SMF发送N11消息，消息包括N2SM信息和RAT类型。其中N2SM信息包括(R)AN隧道信息。
步骤10、(可选)如果部署了动态PCC(策略控制和计费)，SMF可发起IP-CAN会话修改过程，向PCF提供新的位置信息。
步骤11、包括下述2个步骤
步骤11a、(可选)SMF向UPF发送N4会话更新请求，消息参数为(R)AN隧道信息。如果需要建立或更新用户面，SMF发起N4会话修改过程，并提供(R)AN隧道信息。
步骤11b、(可选)UPF向SMF发送N4会话更新回复。
步骤12、SMF向AMF发送N11消息确认消息。
进而，参见图2，图中示出了一种路由方法，具体步骤如下：
步骤201、AMF向(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；
上述AMF是接入管理功能，或者也可以称为接入管理功能实体。
上述会话相关信息可以是会话管理信息，例如N2SM信息。
上述路由信息也可以称为关联信息，可以是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。以PDU会话ID(PDU Session ID)为例，上述路由信息(关联信息)使得AMF将响应关联至正确的SMF(即，相关SMF)。这里，正确的SMF例如是指可处理N2SM信息的相关SMF。然而，本公开文本并不以此为限。
其中，可选地，AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息，可参见随后给出的实施例五。
其中，可选地，SMF的信息可以是SMF的标识、SMF的FQDN(全称域名)、SMF的IP地址以及SMF的TEID(Tunnel Endpoint ID，隧道端点标识)中的任意一种或多种。
步骤202、AMF根据路由信息将所述会话相关信息路由至正确的SMF(即，相关SMF)。
上述SMF是会话管理功能，或者也可以称为会话管理功能实体。
在本实施例中，可选地，在AMF接收无线接入网(R)AN发送的第一消息之前，所述方法还包括：AMF向(R)AN发送第二消息，第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。例如参见图4的步骤402，图5的步骤502。
在本实施例中，可选地，上述AMF向(R)AN发送第二消息的步骤可以包括：AMF将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述第二消息中携带每个会话相关信息关联的路由信息；所述AMF向所述(R)AN发送所述第二消息，例如参见图7的步骤702。
在本实施例中，可选地，步骤202(即，AMF根据所述路由信息将所述会话相关信息路由至正确的SMF(即，相关SMF))包括：当AMF接收到所述(R)AN发送的确认所述第二消息的第一消息时，所述AMF根据与会话相关 信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
在本实施例中，可选地，所述方法还包括：
所述AMF存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
因此，通过上述步骤201～步骤202实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例二
参见图3，图中示出了一种路由方法，具体步骤如下：
步骤301、(R)AN向AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的SMF。
上述AMF是接入管理功能，或者也可以称为接入管理功能实体。
上述会话相关信息可以是会话管理信息，例如N2SM信息。
上述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
其中，可选地，AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息，可参见随后给出的实施例五。
其中，可选地，SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
在本实施例中，可选地，在(R)AN向AMF发送第一消息之前，所述方法还包括：(R)AN接收所述AMF发送的第二消息，第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
通过上述步骤实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例三
本实施例描述的是路由信息是PDU会话ID时的信令过程。
参见图4，图中示出了路由流程示意图，具体步骤如下：
步骤401、SMF向AMF发送N11消息，N11消息中包括N2SM信息和PDU会话ID。
步骤402、AMF向(R)AN发送N2请求消息，N2请求消息中包括N2SM信息和PDU会话ID。
步骤403、(R)AN向AMF返回N2请求确认消息，N2请求确认消息中包括N2SM信息和PDU会话ID。
步骤404、AMF根据PDU会话ID查找UE的上下文，以及查找到相关的SMF，然后向SMF发送N11消息，N11消息中包括N2SM信息。
通过上述步骤401～步骤404实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例四
本实施例描述的是路由信息是SMF的信息时的信令过程。
参见图5，图中示出了路由流程示意图，具体步骤如下：
步骤501、SMF向AMF发送N11消息，N11消息中包括N2SM信息。
步骤502、AMF向(R)AN发送N2请求消息，N2请求消息中包括N2SM信息和SMF的信息。
SMF的信息可以是SMF的标识或IP地址，当然也并不限于此。
步骤503、(R)AN向AMF返回N2请求确认消息，N2请求确认消息中包括N2SM信息和SMF的信息。
步骤504、AMF根据SMF的信息向SMF发送N11消息，N11消息中包括N2SM信息。
通过上述步骤501～步骤504实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例五
本实施例描述的是路由信息是AMF分配的标识时的过程。
参见图6，图中示出了路由流程示意图，具体步骤如下：
步骤601、SMF向AMF发送N11消息，N11消息中包括N2SM信息。
步骤602、AMF分配一个临时标识，在本地存储临时标识和接收到的N11消息之间的映射关系，然后向(R)AN发送N2请求消息，N2请求消息中包括 N2SM信息和AMF分配的标识。
步骤603、(R)AN向AMF返回N2请求确认消息，N2请求确认消息中包括N2SM信息和AMF分配的标识。
步骤604、AMF根据AMF分配的标识，查找到与该标识相关的N11消息，AMF生成与该N11消息相关的回复消息，并向SMF发送N11消息，N11消息中包括N2SM信息。
通过上述步骤601～步骤604实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例六
本实施例描述的是当AMF从为UE提供服务的多个SMF接收到SM信息时，AMF合并或拆分SM信息并完成消息路由的过程。
参见图7，图中示出了路由流程示意图，具体步骤如下：
步骤701a、AMF从SMF1接收到N11消息，消息参数为N2SM信息1。
步骤701b、AMF从SMF2接收到N11消息，消息参数为N2SM信息2。
步骤702、由于两条N11消息与同一UE相关，AMF形成一条N2请求消息，该一条N2请求消息中携带N2SM信息1，信息1的路由信息(即路由信息1)，N2SM信息2，信息2的路由信息(即路由信息2)。AMF将N2请求消息发送至(R)AN。
步骤703、(R)AN处理请求消息中的每个N2SM信息，并形成相应的回复信息。然后向AMF发送N2请求确认消息，消息参数包括N2SM信息1，信息1的路由信息(即路由信息1)，N2SM信息2，信息2的路由信息(即路由信息2)。
步骤704、AMF接收到(R)AN返回的N2请求确认消息之后，根据<N2SM信息，路由信息>信息对(pair)中的路由信息确定需要将N2SM信息发送至哪个SMF，然后向该SMF发送N11消息，消息中携带(R)AN返回的N2SM信息。
上述过程可发生在业务请求过程中，例如当UE在业务请求消息中携带多个PDU会话ID时，如果这些PDU会话的服务SMF不同，AMF需要触发这多个SMF激活相应PDU会话的用户面连接。在该过程中，AMF可从不同 的SMF接收到N11消息，且AMF接收到这些N11消息的时间几乎一致。
通过上述步骤701～步骤704实现了在(R)AN和SMF之间正确路由与会话相关的信息。
实施例七
基于同一发明构思，本公开文本实施例中还提供了一种路由装置，由于该路由装置解决问题的原理与本公开文本实施例图2、图4～图7中路由方法相似，因此该路由装置的实施可以参见方法的实施，重复之处不再敷述。
参见图8，图中示出了一种路由装置，该路由装置800包括：
第一接收模块801，用于接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；以及
路由模块802，用于根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
在本实施例中，可选地，所述路由装置还包括：
第一发送模块，用于向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
在本实施例中，可选地，所述第一发送模块进一步用于：将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；向所述(R)AN发送所述第二消息。
在本实施例中，可选地，所述第一发送模块进一步用于：
当接收到所述(R)AN发送的确认所述第二消息的第一消息时，根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
在本实施例中，可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
在本实施例中，可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
在本实施例中，可选地，所述SMF的信息是SMF的标识、SMF的全称 域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
在本实施例中，可选地，所述路由装置还包括：
存储模块，用于存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
实施例八
基于同一发明构思，本公开文本实施例中还提供了一种路由装置，由于该路由装置解决问题的原理与本公开文本实施例图3～图7中路由方法相似，因此该路由装置的实施可以参见方法的实施，重复之处不再敷述。
参见图9，图中示出了一种路由装置，该路由装置900包括：
第二发送模块901，用于向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能SMF。
在本实施例中，可选地，所述路由装置还包括：
第二接收模块(未示出)，用于接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
在本实施例中，可选地，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
在本实施例中，可选地，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
在本实施例中，可选地，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
实施例九
基于同一发明构思，本公开文本实施例中还提供了一种路由装置，由于该路由装置解决问题的原理与本公开文本实施例图2、图4～图7中路由方法 相似，因此该路由装置的实施可以参见方法的实施，重复之处不再敷述。
参见图10，本公开文本实施例提供了一种路由装置，包括：
第一处理器1004，用于读取第一存储器1005中的程序，执行下列过程：
接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
第一收发机1001，用于在第一处理器1004的控制下接收和发送数据。
在图10中，总线架构(用第一总线1000来代表)可以包括任意数量的互联的总线和桥，第一总线1000将包括由第一处理器1004代表的一个或多个处理器和第一存储器1005代表的存储器的各种电路链接在一起。第一总线1000还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。第一总线接口1003在第一总线1000和第一收发机1001之间提供接口。第一收发机1001可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经第一处理器1004处理的数据通过第一收发机1001和第一天线1002在无线介质上进行传输，进一步，第一天线1002还接收数据并将数据经由第一收发机1001传送给第一处理器1004。
第一处理器1004负责管理第一总线1000和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而第一存储器1005可以被用于存储第一处理器1004在执行操作时所使用的数据。具体的，第一处理器1004可以是CPU、ASIC、FPGA或CPLD。
可选地，第一处理器1004具体用于向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
可选地，第一处理器1004具体用于将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；向所述(R)AN发送所述第二消息。
可选地，第一处理器1004具体用于当接收到所述(R)AN发送的确认所述 第二消息的第一消息时，根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
可选地，第一处理器1004具体用于存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
实施例十
基于同一发明构思，本公开文本实施例中还提供了一种路由装置，由于该路由装置解决问题的原理与本公开文本实施例图3～图7中路由方法相似，因此该路由装置的实施可以参见方法的实施，重复之处不再敷述。
参见图11，本公开文本实施例提供了一种路由装置，包括：
第二处理器1104，用于读取第二存储器1105中的程序，执行下列过程：
向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能SMF。
第二收发机1101，用于在第二处理器1104的控制下接收和发送数据。
在图11中，总线架构(用第二总线1100来代表)可以包括任意数量的互联的总线和桥，第二总线1100将包括由第二处理器1104代表的一个或多个处理器和第二存储器1105代表的存储器的各种电路链接在一起。第二总线1100还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。第二总线接口1103在第二总线1100和第二收发机1101之间提供接口。第二收发机1101可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经第二处理器1104处理的数据通过第二收发机1101和第二天线1102在无线介质上进行传输，进一步，第二天线1102还接收数据并将数据经由第二收发机1101传送给第二处理器1104。
第二处理器1104负责管理第二总线1100和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而第二存储器1105可以被用于存储第二处理器1104在执行操作时所使用的数据。具体的，第二处理器1104可以是CPU、ASIC、FPGA或CPLD。
可选地，第二处理器1104具体用于接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本公开文本的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。
在本公开文本的各种实施例中，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，而不应对本公开文本实施例的实施过程构成任何限定。
另外，本文中术语“系统”和“网络”在本文中常可互换使用。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请所提供的实施例中，应理解，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
在本申请所提供的几个实施例中，应该理解到，所揭露方法和装置，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。另一点，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。
另外，在本公开文本各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理包括，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用硬件 加软件功能单元的形式实现。
上述以软件功能单元的形式实现的集成的单元，可以存储在一个计算机可读取存储介质中。上述软件功能单元存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络侧设备等)执行本公开文本各个实施例所述收发方法的部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，简称ROM)、随机存取存储器(Random Access Memory，简称RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述的是本公开文本的优选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本公开文本所述的原理前提下还可以做出若干改进和润饰，这些改进和润饰也在本公开文本的保护范围内。

Claims (30)

  1. 一种路由方法，包括：
    接入和移动性管理功能AMF接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；以及
    所述AMF根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
  2. 根据权利要求1所述的路由方法，其中，在接入和移动性管理功能AMF接收无线接入网(R)AN发送的第一消息之前，所述路由方法还包括：
    所述AMF向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
  3. 根据权利要求2所述的路由方法，其中，所述AMF向所述(R)AN发送第二消息，包括：
    所述AMF将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；以及
    所述AMF向所述(R)AN发送所述第二消息。
  4. 根据权利要求3所述的路由方法，其中，所述AMF根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF，包括：
    当所述AMF接收到所述(R)AN发送的确认所述第二消息的第一消息时，所述AMF根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
  5. 根据权利要求1至4中任一项所述的路由方法，其中，所述路由信息是协议数据单元PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
  6. 根据权利要求5所述的路由方法，其中，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
  7. 根据权利要求5所述的路由方法，其中，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
  8. 根据权利要求1至7中任一项所述的路由方法，其中，所述路由方法还包括：
    所述AMF存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
  9. 一种路由方法，包括：
    无线接入网(R)AN向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能SMF。
  10. 根据权利要求9所述的路由方法，其中，在(R)AN向AMF发送第一消息之前，所述方法还包括：
    所述(R)AN接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
  11. 根据权利要求9或10所述的路由方法，其中，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
  12. 根据权利要求11所述的方法，其中，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
  13. 根据权利要求11所述的路由方法，其中，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
  14. 一种路由装置，包括：
    第一接收模块，用于接收无线接入网(R)AN发送的第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息；以及
    路由模块，用于根据所述路由信息将所述会话相关信息路由至正确的会话管理功能SMF。
  15. 根据权利要求14所述的路由装置，其中，所述路由装置还包括：
    第一发送模块，用于向所述(R)AN发送第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
  16. 根据权利要求15所述的路由装置，其中，所述第一发送模块进一步用于：将其从多个SMF接收到的会话相关信息合并到一个第二消息中，在所述一个第二消息中携带与每个会话相关信息关联的路由信息；向所述(R)AN发送所述第二消息。
  17. 根据权利要求16所述的路由装置，其中，所述第一发送模块进一步用于：
    当接收到所述(R)AN发送的确认所述第二消息的第一消息时，根据与会话相关信息关联的路由信息确定正确的SMF，并向所述SMF发送所述会话相关信息。
  18. 根据权利要求14至17中任一项所述的路由装置，其中，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
  19. 根据权利要求18所述的路由装置，其中，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
  20. 根据权利要求18所述的路由装置，其中，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
  21. 根据权利要求14至20中任一项所述的路由装置，其中，所述路由装置还包括：
    存储模块，用于存储所述路由信息和与所述路由信息对应的SMF之间的路由关系。
  22. 一种路由装置，包括：
    第二发送模块，用于向接入和移动性管理功能AMF发送第一消息，所述第一消息中包括会话相关信息和与所述会话相关信息关联的路由信息，所述路由信息用于所述AMF将所述会话相关信息路由至正确的会话管理功能 SMF。
  23. 根据权利要求22所述的路由装置，其中，所述路由装置还包括：
    第二接收模块，用于接收所述AMF发送的第二消息，所述第二消息包括会话相关信息和与所述会话相关信息关联的路由信息，其中，所述第一消息是所述第二消息的确认消息。
  24. 根据权利要求22或23所述的路由装置，其中，所述路由信息是PDU会话ID、AMF分配的标识和SMF的信息中的任意一种或多种。
  25. 根据权利要求24所述的路由装置，其中，所述AMF分配的标识是AMF收到SMF发送的第三消息时分配的一个与会话相关信息对应的临时标识，所述第三消息包括会话相关信息。
  26. 根据权利要求24所述的路由装置，其中，所述SMF的信息是SMF的标识、SMF的全称域名FQDN、SMF的IP地址以及SMF的隧道端点标识TEID中的任意一种或多种。
  27. 一种AMF设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求1至8中任一项所述的路由方法中的步骤。
  28. 一种(R)AN设备，包括：处理器、存储器及存储在所述存储器上并可在所述处理器上运行的计算机程序，所述计算机程序被所述处理器执行时实现如权利要求9至13中任一项所述的路由方法中的步骤。
  29. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求1至8中任一项所述的路由方法中的步骤。
  30. 一种计算机可读存储介质，所述计算机可读存储介质上存储有计算机程序，所述计算机程序被处理器执行时实现如权利要求9至13中任一项所述的路由方法中的步骤。
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