WO2021227599A1 - 一种通信的方法及装置 - Google Patents

一种通信的方法及装置 Download PDF

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Publication number
WO2021227599A1
WO2021227599A1 PCT/CN2021/077701 CN2021077701W WO2021227599A1 WO 2021227599 A1 WO2021227599 A1 WO 2021227599A1 CN 2021077701 W CN2021077701 W CN 2021077701W WO 2021227599 A1 WO2021227599 A1 WO 2021227599A1
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WO
WIPO (PCT)
Prior art keywords
terminal
access
access network
network device
resource information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/077701
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English (en)
French (fr)
Inventor
朱方园
李岩
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to BR112022023153A priority Critical patent/BR112022023153A2/pt
Priority to JP2022569183A priority patent/JP7583831B2/ja
Priority to KR1020227043125A priority patent/KR20230008839A/ko
Priority to EP21804406.3A priority patent/EP4142340B1/en
Publication of WO2021227599A1 publication Critical patent/WO2021227599A1/zh
Priority to US17/984,614 priority patent/US20230079792A1/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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • 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
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a communication method and device.
  • a physical network can be abstractly divided into multiple network slices.
  • Each network slice constitutes an end-to-end logical network, and different network slices are logically isolated.
  • Each network slice can flexibly provide one or more network services according to demand, and does not affect each other with other network slices.
  • the currently defined standard network slicing types include enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC), and massive internet of things (eMBB). things, MIoT).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low-latency communication
  • MIoT massive internet of things
  • different network slices have different performance requirements, such as augmented reality (AR) services or virtual reality (VR) services.
  • Network slicing requires large bandwidth and low latency; the Internet of Things (Internet of Things) , IOT) business network slicing requires support for massive terminal access, but the bandwidth is small and there is no requirement for delay.
  • IOT Internet of Things
  • the wireless resources for example, frequency or frequency band
  • the wireless resources for example, frequency or frequency band
  • the wireless resources for example, frequency or frequency band
  • access from 2.6 GHz or 4.9 GHz is required
  • URLLC type network slices access from 4.9 GHz is required.
  • the access network devices that need to be accessed corresponding to different network slices may also be different.
  • the access network device 1 supports the access of the network slicing MIoT, and the access network device 1 does not support the access of the network slicing URLLC.
  • a possible situation is that the access network device currently connected to the terminal does not support the network slice a, or the access network device currently connected to the terminal supports the network slice a, but The wireless resource of the terminal accessing the access network device does not support the network slice a. In both cases, the terminal cannot normally access to the network slice a that requests access. In turn, there is a problem that the terminal blindly selects access network equipment and wireless resources, which results in a low probability of the terminal successfully accessing the network slice and a slower speed of successfully accessing the network slice.
  • the embodiments of the present application provide a communication method and device to solve the problem that the terminal cannot normally access the network slice that is requested to access.
  • a communication method is provided, which is applied to access and mobility management function (AMF) equipment.
  • AMF access and mobility management function
  • the AMF device receives a first message from a terminal from a first access network device, where the first message includes an identifier of the first network slice that the terminal requests to access.
  • the AMF device determines that the first access network device does not support the first network slice.
  • the AMF device sends a second message to the first communication device, the second message includes: second wireless resource information, and the second wireless resource information is used by the terminal to select a second access network device, so The second access network device supports the first network slice, and the first communication device is the first access network device or the terminal.
  • the terminal usually blindly selects the access network device, which causes the terminal to be unable to access the requested first network slice.
  • the AMF device determines the second radio resource information based on the first network slice that the terminal requests to access.
  • the terminal is based on the second network slice.
  • the radio resource information is connected to the second access network device. Since the second access network device is determined based on the second wireless resource information, and the second wireless resource information is determined based on the first network slice, it can be ensured that the terminal accesses the first network slice through the second access network device. Above, the success rate and efficiency of terminal access to network slicing can also be improved.
  • the second wireless resource information may be a radio access technology/frequency point preference index value (radio access technology). /frequency selection priority index, RFSP Index).
  • the first access network device may determine the frequency band priority list information corresponding to the RFSP index value, and send the frequency band priority list information to the terminal. Therefore, the terminal can access the second access network device according to the frequency band priority list information, and then access the first network slice through the second access network device.
  • the second wireless resource information may be frequency band priority list information.
  • the AMF device directly sends the frequency band priority list information to the terminal, so that the terminal can access the second access network device according to the frequency band priority list information, and then access the first network slice through the second access network device.
  • the first network slice is a network slice that the AMF device allows the terminal to access, or is a network slice that the AMF device rejects the terminal to access. Rejecting the terminal from accessing the first network slice is actually only to indicate that the first access network device does not support the first network slice, and therefore it is not possible to restrict the terminal from being able to access the first network slice.
  • the second message may further include: first indication information; when the first communication device is the terminal, the first indication information is used to indicate at least one of the following: indication The terminal releases the wireless connection; after instructing the terminal to enter the idle state, initiate a registration process; instructing the first access network device currently accessed by the terminal does not support the first network slice; instructing the terminal according to The second wireless resource information accesses the first network slice, and the first network slice is associated with the second wireless resource information.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; instruct the first The access network device does not support the first network slice.
  • the AMF device may also send a third message to the policy control function PCF device, and the third message may include the identifier of the first network slice; the AMF device may also receive information from all The fourth message of the PCF device, where the fourth message includes the RFSP index value.
  • the AMF device obtains the RFSP index value from the PCF device, so as to subsequently send the RFSP index value to the first access network device or determine the frequency band priority list information corresponding to the RFSP index value and send it to the terminal.
  • the RFSP index value may be determined according to the identifier of the first network slice, and the terminal may access the first network slice according to the frequency band priority list information determined by the RFSP index value.
  • a communication method is provided, which is applied to AMF equipment.
  • the AMF device receives a first message from a terminal from a first access network device, where the first message includes an identifier of the first network slice that the terminal requests to access.
  • the AMF device determines that the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice.
  • the AMF device sends a second message to the first communication device, the second message including: second wireless resource information, and the second wireless resource information is used by the terminal to receive information according to the second wireless resource information.
  • the first access network device supports the first network slice; the first communication device is the first access network device or the terminal.
  • the terminal usually blindly selects the access network device and wireless resource information, which results in the terminal being unable to access the requested first network slice.
  • the AMF device determines the second wireless resource information based on the first network slice.
  • the terminal is based on the first network slice. 2.
  • the wireless resource information is connected to the first access network device. Since the second wireless resource information is determined based on the first network slice, it can be ensured that the terminal can access the first network slice through the first access network device through the second wireless resource information, which can also improve the terminal's access to the network slice. The success rate and efficiency.
  • the second wireless resource information may be an RFSP index value.
  • the first access network device may determine the frequency band priority list information corresponding to the RFSP index value, and send the frequency band priority list information to the terminal. Therefore, the terminal can access the first access network device according to the frequency band priority list information, and then access the first network slice through the first access network device.
  • the second wireless resource information may be frequency band priority list information.
  • the AMF device directly sends the frequency band priority list information to the terminal, so that the terminal can access the first access network device according to the frequency band priority list information, and then access the first network slice through the first access network device.
  • the AMF device may also receive the first radio resource information from the first access network device. That is, the first wireless resource information selected by the terminal to access the first access network device is obtained from the first access network device.
  • the first network slice is a network slice that the AMF device allows the terminal to access, or is a network slice that the AMF device rejects the terminal to access. Rejecting the terminal from accessing the first network slice is actually only to indicate that the first access network device does not support the first network slice, and therefore it is not possible to restrict the terminal from being able to access the first network slice.
  • the second message further includes: first indication information; when the first communication device is the terminal, the first indication information is used to indicate at least one of the following: The terminal releases the wireless connection; after instructing the terminal to enter the idle state, initiate a registration process; instructing the terminal to access the first access network device and the selected first wireless resource information does not support the first network Slice; indicating that the first wireless resource information selected by the terminal to access the first access network device is wrong; instructing the terminal to access the first network slice according to the second wireless resource information, so The first network slice is associated with the second wireless resource information.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; instruct the terminal to connect The first wireless resource information selected by the first access network device does not support the first network slice; the terminal is instructed to access the first wireless resource selected by the first access network device Resource information is wrong.
  • the AMF device may also send a third message to the policy control function PCF device, and the third message may include the identifier of the first network slice; the AMF device may also receive information from all The fourth message of the PCF device, where the fourth message includes the RFSP index value.
  • the AMF device obtains the RFSP index value from the PCF device, so as to subsequently send the RFSP index value to the first access network device or determine the frequency band priority list information corresponding to the RFSP index value and send it to the terminal.
  • the RFSP index value may be determined according to the identifier of the first network slice, and the terminal may access the first network slice according to the frequency band priority list information determined by the RFSP index value.
  • a communication method is provided, which is applied to a terminal.
  • the terminal sends a first message to the AMF device through the first access network device, where the first message includes the identifier of the first network slice that the terminal requests to access.
  • the terminal receives second wireless resource information, and the second wireless resource information is associated with the first network slice.
  • the terminal receives the first indication information from the AMF device.
  • the second radio resource information and the first indication information may be received in the same message or in different messages.
  • the first indication information is used to indicate at least one of the following: instruct the terminal to release the wireless connection; instruct the terminal to initiate a registration process after entering an idle state; and indicate the first access network that the terminal is currently accessing
  • the device does not support the first network slice; the first wireless resource information selected by the device instructing the terminal to access the first access network does not support the first network slice; instructing the terminal to access the The first wireless resource information selected by the first access network device is wrong; and the terminal is instructed to access the first network slice according to the second wireless resource information.
  • the first access network device does not support the first network slice; the terminal selects a second access network device according to the second radio resource information, and the second access network device The network device supports the first network slice.
  • the terminal may determine that the first access network device does not support the first network slicing by using the first access network device that the terminal currently accesses as indicated in the first indication information does not support the first network slicing. Furthermore, the terminal selects the second access network device according to the second wireless resource information in the first indication information. Since the second wireless resource information is associated with the first network slice, the selected second access network device can support the first network slice.
  • the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice, and the terminal is based on the second wireless resource information The first access network device is accessed, and the first access network device supports the first network slice.
  • the terminal may determine that the first wireless resource information selected by the terminal currently accessing the first access network device indicated in the first indication information does not support the first network slice or the first wireless resource information is wrong.
  • the resource information does not support the first network slice.
  • the terminal can still access the first access network device, but only through the second wireless resource information, but not through the first wireless resource information.
  • the terminal initiates a wireless connection release process and enters an idle state.
  • the terminal may initiate the registration process after releasing the wireless connection or instructing the terminal to enter the idle state according to the terminal indicated in the first indication information, and actively initiate the wireless connection release process and enter the idle state.
  • the terminal may receive the second radio resource information from the AMF device from the first access network device.
  • the AMF device may directly send the second wireless resource information to the terminal, and the first access network device only performs transparent transmission.
  • the second wireless resource information may be frequency band priority list information.
  • the terminal may also receive second radio resource information from the first access network device.
  • the AMF device may first send the information used to determine the second wireless resource information (for example, the RFSP index value) to the first access network device, and the first access network device may send it after determining the second wireless resource information.
  • the second wireless resource information for example, the RFSP index value
  • the terminal may also send a request message to the first access network device, and the request The message carries the identifier of the first network slice; the request message is used to obtain the second radio resource information.
  • the first access network device may actively send the second wireless resource information to the terminal, or after the terminal requests the first access network device, the first access network device sends the second wireless resource information to the terminal.
  • a communication method is provided, which is applied to a first access network device.
  • the first access network device receives the first message from the terminal, and sends the first message to the AMF device, where the first message includes the identifier of the first network slice that the terminal requests to access.
  • the first access network device receives a second message from the AMF device, the second message includes second wireless resource information and first indication information, and the second wireless resource information and the first Associated with network slices.
  • the second wireless resource information may be an RFSP index value.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; indicate that the first access network device does not support the first network slice; instruct the terminal to connect The first wireless resource information selected by the first access network device does not support the first network slice; the first wireless resource information selected by the first access network device instructed to access the first access network device is wrong.
  • the second radio resource information is used by the terminal to select a second access network device, the second access network device supports the first network slice, and the first access network device The network device does not support the first network slice; or, the second wireless resource information is used by the terminal to select the first access network device, and the first access network device supports the first network slice, so The first wireless resource information selected by the terminal to access the first access network device does not support the first network slice. Since the second wireless resource information is associated with the first network slice, the first access network device or the second access network device selected by the terminal can support the first network slice.
  • the first access network device releases the wireless connection.
  • the first access network device may release the wireless connection according to the first access network device indicated in the first instruction information to actively release the wireless connection.
  • the first access network device sends the first wireless resource information selected by the terminal to access the first access network device to the AMF device. So that the AMF device can determine whether the first wireless resource information supports the first network slice.
  • the second wireless resource information received by the first access network device is an RFSP index value
  • the first access network device sends all information to the terminal or the AMF device.
  • the frequency band priority list information corresponding to the RFSP index value.
  • the AMF device sends the RFSP index value to the first access network device, and the first access network device sends the frequency band priority list information to the terminal so that the terminal can access the first network slice according to the frequency band priority list information.
  • the AMF device sends the RFSP index value to the first access network device, the first access network device sends the frequency band priority list information to the AMF device, and the AMF device sends the frequency band priority list information to the terminal so that the terminal can according to the frequency band
  • the priority list information is connected to the first network slice.
  • the first access network device may also receive a message sent by the terminal
  • the request message carries the identifier of the first network slice; the request message is used to obtain the second wireless resource information, and the second wireless resource information may be frequency band priority list information.
  • the first access network device may also actively send the second wireless resource information to the terminal, or after the terminal requests the first access network device, the first access network device sends the second wireless resource information to the terminal.
  • a communication device which has the function of realizing the AMF device in any possible implementation of the first aspect and the first aspect, or realizing any of the second aspect and the second aspect.
  • These functions can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more functional modules corresponding to the above-mentioned functions.
  • a communication device may be an AMF device in any possible implementation of the first aspect and the first aspect or any possible implementation of the second aspect and the second aspect, or set The chip in the AMF device.
  • the device includes a transceiver, a processor, and optionally, a memory. Wherein, the memory is used to store computer programs or instructions, and the processor is respectively coupled with the memory and the transceiver. When the processor executes the computer programs or instructions, the device executes the first aspect and the first aspect through the transceiver.
  • the method executed by the AMF device in any possible implementation, or the method executed by the AMF device in any possible implementation of the second aspect and the second aspect described above.
  • a communication device in any possible implementation of the third aspect and the third aspect of the foregoing method, or a chip set in the terminal.
  • the device includes a transceiver, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions
  • the processor is respectively coupled with the memory and the transceiver.
  • the processor executes the computer programs or instructions
  • the device executes the third aspect and the third aspect through the transceiver.
  • a method executed by the terminal in any possible implementation.
  • a communication device may be the first access network device in any possible implementation of the fourth aspect and the fourth aspect of the foregoing method, or be set in the first access network device Chip.
  • the device includes a transceiver, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is respectively coupled with the memory and the transceiver.
  • the processor executes the computer programs or instructions
  • the device executes the fourth aspect and the fourth aspect through the transceiver.
  • a method executed by the first access network device in any possible implementation.
  • a computer program product includes: computer program code, when the computer program code runs on a computer, the computer executes the first aspect and any one of the possible aspects of the first aspect.
  • the present application provides a chip system that includes a processor and a memory, and the processor and the memory are electrically coupled; the memory is used to store computer program instructions; the processor , Used to execute part or all of the computer program instructions in the memory, when the part or all of the computer program instructions are executed, used to implement the AMF device in the first aspect and any possible implementation method of the first aspect , Or implement the function of the AMF device in any possible implementation method of the second aspect and the second aspect, or implement the function of the terminal in any possible implementation method of the third aspect and the third aspect, or implement The function of the first access network device in the foregoing fourth aspect and any possible implementation method of the fourth aspect.
  • the chip system may further include a transceiver, and the transceiver is configured to send a signal processed by the processor or receive a signal input to the processor.
  • the chip system can be composed of chips, and can also include chips and other discrete devices.
  • a computer-readable storage medium stores a computer program.
  • the method executed by the device is executed, or the method executed by the AMF device in any possible implementation of the second aspect and the second aspect is executed, or the method executed by the terminal in any possible implementation of the third aspect and the third aspect is executed.
  • the method is executed, or the method executed by the first access network device in any possible implementation of the foregoing fourth aspect and the fourth aspect is executed.
  • a communication system includes: an AMF device that executes any of the foregoing first aspect and any possible implementation method of the first aspect, and executes any of the foregoing fourth aspect and fourth aspect; A possible implementation of the method in the first access network device.
  • the communication system further includes: a terminal that executes the foregoing third aspect and any possible implementation method of the third aspect.
  • a communication system includes: an AMF device that executes any of the foregoing second aspect and any of the possible implementation methods of the second aspect, and executes any of the foregoing fourth aspect and the fourth aspect.
  • the communication system further includes: a terminal that executes the foregoing third aspect and any possible implementation method of the third aspect.
  • FIG. 1a, FIG. 1b, and FIG. 1c are schematic diagrams of the architecture of a communication system respectively provided in the embodiments of this application;
  • FIG. 2, FIG. 3, FIG. 4, and FIG. 5 are schematic diagrams of a communication process respectively provided in the embodiments of this application;
  • Fig. 6 and Fig. 7 are a communication device provided in an embodiment of this application.
  • LTE long term evolution
  • WiMAX worldwide interoperability for microwave access
  • 5th generation 5th generation
  • 5G fifth generation
  • NR new radio
  • This application uses a 5G communication system as an example.
  • FIG. 1a is a schematic diagram of a 5G communication system architecture to which this application can be applied.
  • FIG. 1a is a schematic diagram of a 5G network architecture based on a service-oriented architecture.
  • FIG. 1b is a schematic diagram of another 5G communication system architecture to which this application can be applied.
  • FIG. 1b is a schematic diagram of a point-to-point 5G architecture.
  • the main difference between Figure 1a and Figure 1b is that the interfaces between the various network elements in Figure 1a are service-oriented interfaces, and the interfaces between the various network elements in Figure 1b are point-to-point interfaces.
  • the 5G network architecture shown in FIG. 1a and FIG. 1b may include a terminal device part, an access network part, and a core network part. Optionally, it also includes a data network (DN) and an application function (AF) network element part.
  • the terminal accesses the core network through the access network, and the core network communicates with the DN or AF.
  • DN data network
  • AF application function
  • Terminal device also called user equipment (user equipment, UE), is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; it can also be deployed on water (Such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, satellites, etc.).
  • the terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, a virtual reality (VR) terminal, an augmented reality (AR) terminal, an industrial control (industrial control) terminal.
  • Wireless terminals in wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and wireless terminals in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the (R)AN device in this application is a device that provides wireless communication functions for terminal devices, and the (R)AN device is also called an access network device.
  • the RAN equipment in this application includes but is not limited to: next-generation base stations (gnodeB, gNB), evolved node B (evolved node B, eNB), radio network controller (RNC), node B in 5G (node B, NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved nodeB, or home node B, HNB), baseband unit (baseBand) unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, etc.
  • next-generation base stations gnodeB, gNB
  • evolved node B evolved node B
  • RNC radio network controller
  • node B in 5G node B, NB
  • BSC base station controller
  • BTS base transceiver station
  • Data network DN can deploy multiple services and provide data and/or voice services for terminal devices.
  • DN is the private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be terminal devices.
  • Sensors and control servers are deployed in the DN.
  • the control server can provide services for the sensors.
  • the sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions.
  • the DN is the internal office network of a company.
  • the mobile phones or computers of the employees of the company can be terminal devices, and the mobile phones or computers of the employees can access the information and data resources on the internal office network of the company.
  • the application network element mainly supports the interaction with the 3rd generation partnership project (3rd generation partnership project, 3GPP) core network to provide services, such as influencing data routing decisions, policy control functions, or providing third-party services to the network side.
  • 3rd generation partnership project 3rd generation partnership project, 3GPP
  • the application network element may be an application function (AF) network element.
  • AF application function
  • the application network element may still be an AF network element, or may also have other names, which is not limited by this application.
  • the core network part may include one or more of the following network elements:
  • the access management network element is a control plane network element provided by the operator's network. It is responsible for the access control and mobility management of terminal equipment accessing the operator's network, such as mobile status management, allocation of temporary user identification, authentication and user And other functions.
  • the access management network element may be an access and mobility management function (AMF) network element.
  • AMF access and mobility management function
  • the access management network element may still be an AMF network element, or may also have other names, which is not limited in this application.
  • the session management network element is mainly responsible for session management in the mobile network, such as session establishment, modification, and release. Specific functions include assigning IP addresses to users and selecting user plane network elements that provide message forwarding functions.
  • the session management network element may be a session management function (session management function, SMF) network element.
  • SMF session management function
  • the session management network element may still be an SMF network element, or may also have other names, which is not limited in this application.
  • the user plane network element is responsible for the forwarding and receiving of user data in the terminal device.
  • User data can be received from the data network and transmitted to the terminal device through the access network device; the user plane network element can also receive the user data from the terminal device through the access network device and forward it to the data network.
  • the transmission resources and scheduling functions in the user plane network element that provide services for the terminal equipment are managed and controlled by the SMF network element.
  • the user plane network element may be a user plane function (UPF) network element.
  • UPF user plane function
  • the user plane network element may still be a UPF network element, or may also have other names, which is not limited in this application.
  • the data management network element is used to generate authentication credential, user identification processing (such as storing and managing user permanent identities, etc.), access control and contract data management, etc.
  • the data management network element may be a unified data management (UDM) network element.
  • UDM unified data management
  • unified data management may still be UDM network elements, or may also have other names, which are not limited by this application.
  • the policy control network element mainly supports the provision of a unified policy framework to control network behavior, provides policy rules to the control layer network function, and is responsible for obtaining user subscription information related to policy decisions.
  • the policy control network element may be a policy and charging rules function (PCRF) network element.
  • the policy control network element may be a policy control function (PCF) network element.
  • PCF policy control function
  • the policy control network element may still be a PCF network element, or may also have other names, which is not limited in this application.
  • Network storage network elements can be used to provide network element discovery functions, and provide network element information corresponding to the network element type based on requests from other network elements.
  • NRF also provides network element management services, such as network element registration, update, de-registration, and network element status subscription and push.
  • the network storage network element may be a network repository function (NRF) network element.
  • NRF network repository function
  • the network storage network element may still be an NRF network element, or may also have other names, which are not limited by this application.
  • the network opening function network element can be used to provide services and capabilities provided by the 3GPP network function equipment to be safely opened to the outside.
  • the network opening function network element may be a network exposure function (NEF) network element.
  • NEF network exposure function
  • the network open function network element may still be a NEF network element, or may also have other names, which is not limited by this application.
  • the network slicing selection network element can be used to select the appropriate network slicing for the terminal's business.
  • the network slice selection network element may be a network slice selection function (network slice selection function, NSSF) network element.
  • NSSF network slice selection function
  • the network opening function network element may still be an NSSF network element, or may also have other names, which is not limited in this application.
  • Network data analysis network elements can be based on various network functions (network functions, NF), such as policy control network elements, session management network elements, user plane network elements, access management network elements, application function network elements (through network capability opening functions) Network element) collect data, and analyze and predict.
  • network functions such as policy control network elements, session management network elements, user plane network elements, access management network elements, application function network elements (through network capability opening functions) Network element) collect data, and analyze and predict.
  • the network data analysis network element may be a network data analysis function (NWDAF).
  • NWDAF network data analysis function
  • the network opening function network element may still be the NWDAF network element, or may also have other names, which is not limited by this application.
  • the unified data storage network element is responsible for storing structured data information, including contract information, policy information, and network data or business data defined in a standard format.
  • the unified data storage network element may be a unified data repository (UDR).
  • the network opening function network element may still be a UDR network element, or may also have other names, which is not limited by this application.
  • the aforementioned network elements or functions may be network elements in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (for example, a cloud platform).
  • a platform for example, a cloud platform.
  • the foregoing network element or function may be implemented by one device, or jointly implemented by multiple devices, or may be a functional module in one device, which is not specifically limited in the embodiment of the present application.
  • NSSF, NRF, NWDAF, UDM, UDR, AMF and other 5GC network functions often handle multiple network slice services.
  • SMF and UPF generally deal with specific network slices.
  • PCF can process multiple network slices, or it may be Only deal with specific network slice business.
  • Access network equipment usually handles services of multiple network slices.
  • a physical network can be abstractly divided into multiple network slices.
  • Each network slice constitutes an end-to-end logical network, and different network slices are logically isolated.
  • Each network slice can flexibly provide one or more network services according to demand, and does not affect each other with other network slices.
  • Currently defined standard network slicing types are eMBB, URLLC and MIoT.
  • the service areas of two different network slices can be completely different, can be partially overlapped, or can be completely the same.
  • the service area of a network slice may include one or more tracking areas (TAs).
  • Tracking area identifier TAI can be used to identify this tracking area, where TAI includes mobile country code (MCC), mobile network code (MNC), and tracking area code (tracking area code) , TAC).
  • MCC mobile country code
  • MNC mobile network code
  • TAC tracking area code
  • TAC tracking area code
  • TAC can also be used to identify this tracking area.
  • One or more AMF devices may be deployed in a tracking area to serve the tracking area, and one or more access network devices may also be deployed to serve the tracking area.
  • one or more network slices can be supported.
  • At least one AMF device that supports the network slice a among the AMF devices serving the tracking area.
  • At least one of the access network devices connected to the AMF device usually supports the network slice a.
  • An AMF device can serve one tracking area or multiple tracking areas.
  • One access network device serves one tracking area.
  • a tracking area can contain one or more cells, and an access network device can serve one or more cells.
  • the network slices supported by an AMF device in different tracking areas may be the same or different. For example, both tracking area 1 and tracking area 2 support network slices a and b, and an AMF device serves both tracking area 1 and tracking area 2.
  • the network slicing of AR services or VR services requires large bandwidth and low latency; the network slicing of Internet of Things (IOT) services requires the access of a large number of terminals, but the bandwidth is small and there is no requirement for latency.
  • IOT Internet of Things
  • the characteristics of wireless networks in each frequency band are also quite different.
  • the medium and low frequency bands have a large coverage area, low power consumption, and can support a low network access rate; high frequency bands have a small coverage area, high power consumption, and can support a high network access rate and low latency.
  • the radio resources for example, frequency or operating bands
  • the radio resources may be different, for example, as shown in Table 1.
  • n1, n77, and n38 in Table 1 represent the numbers corresponding to the frequency bands. According to the definition of the 3GPP TS 38.101 protocol, the description of the numbers corresponding to the frequency bands is shown in Table 2:
  • the access network devices that need to be accessed corresponding to different network slices may also be different.
  • a tracking area TA deploy access network equipment RAN1 (the coverage area of RAN1 is the solid line in the figure), RAN2, RAN 3, and RAN 4 (covered by RAN2, RAN 3, and RAN 4)
  • the area is the dotted line in the figure).
  • the access network device RAN1 uses the mid-low frequency band to provide access to MIoT network slices, and the high frequency band to provide access to eMBB network slices.
  • the terminal does not perceive which network slices the currently connected access network device supports, and the terminal tries to access one or more network slices through blind selection. Assuming that the terminal user has signed the network slice URLLC and eMBB with the operator, if the terminal is in the center of the coverage area of RAN 1, at the cell edge of RAN 2, RAN 3, and RAN 4, the terminal detects that the signal quality of RAN 1 is good, then Access to the network through RAN1. If the terminal requests to access the network slice URLLC, RAN1 does not support the network slice URLLC. In this case, the terminal cannot normally access the network slice URLLC requested for access.
  • the terminal requests to access the network slice eMBB, if the terminal accesses RAN1 in the mid-low frequency band, since RAN1 only supports the network slice eMBB in the high frequency band, the terminal still cannot normally access the network slice eMBB that is requested to access.
  • the "and/or” in this application describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. This situation.
  • the character "/” generally indicates that the associated objects before and after are in an "or” relationship.
  • the multiple involved in this application refers to two or more.
  • the word "exemplary” is used to mean serving as an example, illustration, or illustration. Any embodiments or implementations described as “examples” in this application should not be construed as being more preferred or advantageous than other embodiments or implementations. Rather, the term example is used to present the concept in a concrete way.
  • FIG. 2 a schematic diagram of a communication process according to an embodiment of the present application is proposed, which specifically includes the following steps:
  • Step 201 The terminal sends a non-access stratum (NAS) request message to the AMF device through the first access network device, and correspondingly, the AMF device receives the NAS request message from the first access network device.
  • the NAS request message includes the identifier of the first network slice that the terminal requests to access.
  • the first network slice may be one or multiple.
  • the first access network device may also send the identification of the tracking area where the terminal is currently located and/or the identification of the cell where the terminal is located to the AMF device.
  • the cell identifier may be a cell global identifier (CGI).
  • the NAS message may be a registration request message (registration request).
  • the NAS request message only needs to be processed by the terminal and the core network (core network, CN) device, and the access network device does not need to be processed, and only needs to be forwarded.
  • the NAS message sent by the terminal to the AMF device is called the NAS request message.
  • the NAS message sent by the AMF device to the terminal is called a NAS response message.
  • the first access network device is the access network device (current RAN) that the terminal currently accesses.
  • the wireless resource information selected by the terminal to access the first access network device is called the first wireless resource information.
  • the wireless resource information here can be a frequency point, a frequency, a frequency band, or a frequency spectrum, which is not limited in this application.
  • the first frequency band information For example, it is a frequency value of high frequency, or intermediate frequency, or low frequency, or a specific value, such as 4.9 GHz.
  • the first access network device may also send the first radio resource information selected by the terminal to access the first access network device to the AMF device.
  • Step 202 The AMF device may determine whether the first access network device supports the first network slice. Further, when the first access network device supports the first network slice, the AMF device may also determine whether the first radio resource information selected by the terminal currently accessing the first access network device supports the The first network slice.
  • the AMF device obtains the network slice supported by the access network device deployed in the area served by the AMF device. It is also possible to obtain which wireless resource information the access network device supports which network slices.
  • the AMF device can determine whether the first access network device supports the first network slice according to the information, and on which radio resource information the first access network device supports the first network slice.
  • the method for the AMF device to obtain the above information may be local configuration of the AMF device, or the AMF device may obtain it from other network devices, for example, the AMF device obtains it from the access network device or the network slice selection function network element NSSF, which is not limited in this application.
  • the AMF device determines whether the first access network device supports the first network slicing, which may include but is not limited to the following situations:
  • the cells served by the first access network device include cells that support the first network slice.
  • the slicing service area (slicing area, SA) where the first access network device is located supports the first network slicing.
  • the SA where the access network device is located includes one or more access network devices.
  • the coverage area of the SA may be larger than the coverage area of the TA, or the coverage area of the SA may be smaller than the coverage area of the TA, which is not limited in this application.
  • the TA where the first access network device is located supports the first network slice.
  • the AMF device can save the information shown in Table 3.
  • the AMF device obtains the identification of the access network device (RAN) deployed in the area served by the AMF device, and the tracking area (TA) identification, and the identification of the network slice supported by the tracking area where the access network device is located.
  • RAN access network device
  • TA tracking area
  • the service area of the AMF device includes TAI-1 and TAI-2.
  • RAN1 is located in TAI-1, and the network slice supported by TAI-1 is S-NSSAI-1.
  • RAN2 and RAN3 are located in TAI-2, and the network slice supported by TAI-2 is S-NSSAI-2.
  • the AMF device can determine the first access network device The TAI where it is located supports S-NSSAI-1 but does not support S-NSSAI-2, that is, the first access network device supports S-NSSAI-1 but does not support S-NSSAI-2.
  • the AMF device may store the information shown in Table 4, and the AMF device obtains the correspondence between the network slice and the radio resource information required to access the network slice.
  • the AMF device may support the network slicing in Table 4 or may not support the network slicing in Table 4, which is not limited in this application.
  • the correspondence between the network slice and the wireless resource information required to access the network slice can be one-to-one (that is, the network slice can only be accessed through one wireless resource), or one-to-many (that is, it can be accessed through multiple A wireless resource accesses the network slice), which is not limited in this application.
  • the wireless resource information required to access the network slice (network slice 1) identified by S-NSSAI-1 is wireless resource information 1, for example, the frequency point resource is 2.6 GHz, or the frequency band resource is n1.
  • the wireless resource information required to access the network slice (network slice 2) identified by S-NSSAI-2 is wireless resource information 2.
  • the frequency point resource is 2.6GHz and 4.9GHz, or the frequency band resource is n77 and n38.
  • Network slice 2 can be accessed through 2.6GHz or 4.9GHz, or through frequency band resources of n77 or n38.
  • the wireless resource information required to access the network slice (network slice 3) identified by S-NSSAI-3 is wireless resource information 3.
  • the wireless resource information 3 includes a frequency point resource of 4.9 GHz, or a frequency band resource of n38.
  • the AMF device may also determine whether there is a second network slice. The access network device supports the first network slice, and if it exists, step 203 or step 204 or step 206 is executed.
  • the method for the AMF device to determine whether the second access network device supports the first network slice is the same as the method for the AMF device to determine whether the first access network device supports the first network slice, and will not be repeated here.
  • the TA where the second access network device is located supports the first network slice.
  • the second access network device can be deployed in the first tracking area or the second tracking area, where the coverage area of the second tracking area and the first tracking area partially overlap, or the location of the first tracking area and the second tracking area similar. It can also be understood that the AMF device determines that there is a second access network device near the location where the terminal is located (the second access network device may also be referred to as target RAN) and can support the first network slice (Requested NSSAI).
  • Requested NSSAI S-NSSAI-2
  • current RAN RAN1
  • the AMF device learns that the terminal is currently located in the first tracking area TAI-1
  • the second tracking area TAI-2 is away from the first tracking area TAI-1
  • the location is relatively close
  • RAN2 and RAN3 are located in TAI-2
  • TAI-2 supports S-NSSAI-2.
  • the AMF judges that the terminal can request access to the Requested NSSAI through RAN2 or RAN3.
  • the second access network device is RAN2 or RAN3.
  • the AMF device can determine that the TAI-2 where the first access network device is located supports S-NSSAI-2, that is, the first access network The device supports S-NSSAI-2.
  • the first wireless resource information selected by the terminal to access the first access network device is wireless resource information 1.
  • access to the network slice identified by S-NSSAI-2 The required radio resource information is radio resource information 2, which is different from radio resource information 1, and the AMF device determines that the first radio resource information selected by the terminal to access the first access network device is wrong.
  • the AMF device may also determine whether the first wireless resource information supports the first network slice according to the above description.
  • the application is not limited. That is, it can be understood that, regardless of whether the first access network device supports the first network slicing, optionally, the AMF device can determine whether the first wireless resource information supports the first network slicing.
  • the first access network device may send the first wireless resource information together with the NAS request message to the AMF device in step 201.
  • step 202a may also be included.
  • the AMF device obtains from the first access network device that the terminal is connected to the first access network device.
  • the first wireless resource information may also be included.
  • the AMF device can perform step 202a, so that in step 202, the AMF device determines that the terminal accesses the first access network. Whether the first wireless resource information of the connected device supports the first network slice that the terminal requests to access.
  • the AMF device can perform step 202a regardless of whether the first access network device supports the first network slice.
  • step 203 the AMF device requests the NRF device to obtain the identification information of the policy control function PCF device.
  • the AMF device calls the NRF device's servicing operation Nnrf_NFDiscovery_Request to request the NRF device to discover the PCF device.
  • the identification information of the PCF device may also be pre-stored in the AMF device, and step 203 may not be performed.
  • step 204 the AMF device sends a third message to the PCF device, and correspondingly, the PCF device receives the third message from the AMF device.
  • the third message includes at least one of the following: an identifier of the first network slice (Requested NSSAI), an identifier of the terminal, and an RFSP index value index of the subscription. If there are multiple first network slices, the third message includes the identifiers of the multiple first network slices, that is, the network slice identifiers included in the Requested NSSAI are all sent to the PCF device.
  • the subscribed RFSP index value index may also be referred to as subscribed subscribed RFSP Index.
  • the subscribed RFSP Index may be obtained by the AMF device from the UDM device, or may be configured locally by the AMF device.
  • the identification of the terminal may be a subscription permanent identifier (SUPI).
  • the AMF device requests the PCF device to obtain policy information, and calls the PCF service operation Npcf_AMPolicyControl_Creat, so as to send the third message to the PCF device. It can also be understood that the third message is Npcf_AMPolicyControl_Creat.
  • step 205 the PCF device sends a fourth message to the AMF device, and correspondingly, the AMF device receives the fourth message from the PCF device.
  • the fourth message includes an authorized RFSP index value (authorized RFSP Index).
  • the fourth message includes the identifier of the first network slice (Requested NSSAI).
  • the authorized RFSP index value is generated based on the first network slice (Requested NSSAI). Specifically, the authorized RFSP index value is generated based on the Requested NSSAI and the subscribed RFSP Index. In order to facilitate the distinction, the authorized RFSP index value generated according to the Requested NSSAI is defined as the first RFSP index value.
  • step 204 and step 205 describe the method in which the AMF device obtains the first RFSP index value through the PCF device.
  • the AMF device can also obtain the first RFSP index value through other methods.
  • the RFSP Index determines the first RFSP index value by itself, or the AMF device obtains the first RFSP index value through other devices, which is not limited in this application.
  • Step 206 The AMF device sends an N2 message (N2 message) to the first access network device (current RAN), and correspondingly, the first access network device receives the N2 message from the AMF device.
  • the N2 message includes at least one of the following: the first Allowed NSSAI, the first RFSP index value (based on the authorized RFSP Index generated by the Requested NSSAI), and the NAS response message.
  • the AMF device notifies the first access network device of the identifier of the network slice that the terminal is allowed to access.
  • the network slice that is notified to the first access network device that the terminal is allowed to access is called the first Allowed NSSAI
  • the network slice that is notified to the terminal that the terminal is allowed to access is called the second Allowed NSSAI
  • the second Allowed NSSAI usually the second Allowed NSSAI It is placed in the NAS response message to notify the terminal.
  • the S-NSSAI included in the first Allowed NSSAI and the S-NSSAI included in the second Allowed NSSAI may be the same or different, which is not limited in this application.
  • the first Allowed NSSAI, the first RFSP index value, and the NAS response message can be sent to the first access network device in one N2 message, or can be sent to the first access network in two or three N2 messages respectively equipment.
  • the NAS message sent by the terminal to the AMF device is called the NAS request message.
  • the NAS message sent by the AMF device to the terminal is called a NAS response message.
  • the NAS response message may be a registration response message
  • the registration response message may be a registration accept message (registration accept) or a registration reject message (registration reject).
  • the method for AMF to determine the S-NSSAI included in the first Allowed NSSAI may include the following:
  • the AMF informs the first access network device
  • the identifier of the network slice that the terminal is allowed to access is the identifier of the first network slice, that is, the S-NSSAI included in the first Allowed NSSAI is the S-NSSAI supported by the current RAN in the Requested NSSAI.
  • Requested NSSAI S-NSSAI-1+S-NSSAI-2
  • current RAN RAN1
  • the AMF informs the first access network device of the first Allowed NSSAI that the terminal is allowed to access, and the S-NSSAI identifier included in the terminal is the default network slice default S- NSSAI logo.
  • Requested NSSAI S-NSSAI-2
  • the NAS response message may include the second Allowed NSSAI
  • the S-NSSAI included in the second Allowed NSSAI included in the NAS response message is the same as the S-NSSAI included in the Requested NSSAI, that is, the terminal is notified that the terminal is allowed to access
  • Requested NSSAI S-NSSAI-2
  • Requested NSSAI S-NSSAI-1+S-NSSAI-2
  • the second Allowed NSSAI S-NSSAI-1+S-NSSAI-2. That is to say, for the above four situations, that is, if the first access network device supports a certain first network slice that the terminal requests to access and the first wireless resource information supports the first network slice (that is, the first wireless resource information is selected correctly ); or, if the first access network device supports a certain first network slice that the terminal requests to access and the first wireless resource information does not support the first network slice (that is, the first wireless resource information is selected incorrectly); or if the first wireless resource information An access network device does not support any first network slice (that is, all S-NSSAI in Requested NSSAI, current RAN does not support) and the first radio resource information supports the first network slice (that is, the first radio resource information is selected correctly ), or if the first access network device does not support any first network slice (that is, all S-NSSAI in Requested N
  • the network slice that is sent to the first access network device to allow terminal access is the default network slice, and the network slice sent to the terminal to allow terminal access
  • the network slice of is the first network slice, that is, the first Allowed NSSAI sent by the AMF device to the first access network device is different from the identifier of the network slice included in the second Allowed NSSAI sent to the terminal. It can ensure that the first access network device supports the first Allowed NSSAI, while allowing the terminal to access the first network slice (that is, the S-NSSAI included in the second Allowed NSSAI is the same as the S-NSSAI included in the Requested NSSAI).
  • the N2 message includes first indication information (indication), and the first indication information may indicate at least one of the following:
  • the first indication information may also indicate any one of the following:
  • the first wireless resource information selected by instructing the terminal to access the first access network device does not support the first network slicing; the content of the instruction is generally applicable to the selection by the terminal for accessing the first access network device The first wireless resource information of does not support the first network slicing;
  • the first wireless resource information selected by the instructing the terminal to access the first access network device is incorrect; the content of the instruction is generally applicable to the first wireless resource information selected by the terminal for accessing the first access network device. Support the first network slicing situation.
  • the first indication information may only indicate any one of the above three items: indicating that the first access network device currently accessed by the terminal does not support the first network slice; the indication content is usually Applicable to the case where the first access network device does not support the first network slice; the first wireless resource information selected by instructing the terminal to access the first access network device does not support the first network slice; The information of the first radio resource selected by instructing the terminal to access the first access network device is wrong.
  • the first indication information may also indicate other content, which is not limited in this application. After receiving the first indication information, the terminal will release the wireless connection, and after entering the idle state (idle), initiate a registration process. Therefore, it can be understood that the first indication information has the function of instructing the terminal to release the wireless connection or instructing the terminal to enter the idle state, and then initiate the registration process.
  • the first indication information may also instruct the terminal to access the first network slice according to second wireless resource information, and the first network slice is associated with the second wireless resource information.
  • the second radio resource information here may be the first frequency band priority list described later.
  • the foregoing first indication information is used to instruct the terminal.
  • the foregoing first indication information may be located in a NAS response message, and the first access network device does not process the NAS response message, but directly sends it to Terminal;
  • the first indication information may not be located in the NAS response message, and the first access network device may also send the first indication information to the terminal.
  • Step 207 The first access network device sends a NAS response message (for example, a registration response message) to the terminal, and correspondingly, the terminal receives the NAS response message sent by the first access network device.
  • the first access network device may also send the first frequency band priority list information to the terminal, specifically:
  • the first frequency band priority list information and the NAS response message may be sent to the terminal in one message, or may be sent to the terminal in two messages respectively.
  • the first access network device sends a radio resource control (radio resource control, RRC) message to the terminal, and the RRC message carries the first frequency band priority list information and the NAS response message.
  • RRC radio resource control
  • the first access network device may also send the first indication information in step 206 to the terminal again.
  • the first access network device may locally configure the RAT/frequency priority user profile identification (subscriber profile ID for RAT/frequency selection priority, SPID) corresponding to the frequency band priority list information, or RFSP Correspondence between index and frequency band priority list information.
  • the first access network device can determine the corresponding first frequency band priority list information according to the first RFSP index carried in the N2 message.
  • the frequency band priority list information in this application can also be referred to as frequency band information, or frequency band list, or frequency band priority information, or frequency band priority list, frequency information, or frequency list, or frequency priority information, or frequency priority list , Frequency point information, or frequency point list, or frequency point priority information, or frequency point priority list, etc.
  • the first access network device may actively send the first frequency band priority list information to the terminal, or the terminal may request to obtain the first frequency band priority list information before sending it to the terminal.
  • the first access network device first sends a NAS response message to the terminal, and then the terminal sends a request message to the first access network device, and the request message carries the identifier of the first network slice (that is, the first network slice).
  • Allowed NSSAI Requested NSSAI); the request message is used to obtain the second radio resource information (first frequency band priority list information). After receiving the request message, the first access network device sends the first frequency band priority list to the terminal.
  • the SPID referred to by the wireless side and the RFSP index on the core network side are the same concept.
  • both the core network side and the wireless side are referred to as RFSP index.
  • the identifier of the network slice is S-NSSAI-2
  • the frequency bands supporting S-NSSAI-2 include frequency band 2 and frequency band 3 (frequency band can also be called radio resource information), and frequency band 2 has a higher priority.
  • Band 3 has a lower priority.
  • the access network equipment supporting frequency band 2 is RAN2, and the access network equipment supporting frequency band 3 is RAN3. It can be understood that the terminal preferentially accesses RAN2 through frequency band 2. If the terminal fails to access RAN2, the terminal accesses RAN3 through frequency band 3.
  • Step 208 The terminal initiates a radio connection release (AN release) procedure according to the first indication information. After the procedure, the terminal releases the RRC connection with the first access network device and enters an idle state.
  • AN release radio connection release
  • step 207 the first access network device does not send the first frequency band priority list information to the terminal
  • step 208 the first access network device sends the first frequency band priority list information to the terminal.
  • the terminal sends an RRC message to the first access network device
  • the first access network device sends the first frequency band priority list information to the UE through the RRC message.
  • Step 209 The terminal selects the target access network device according to the acquired first frequency band priority list information, and initiates the registration process (this is the second registration process initiated). That is, the terminal sends the registration request message again, and the S-NSSAI included in the Requested NSSAI carried in the registration request message is the first network slice in step 201.
  • the method for the terminal to select the target access network device according to the acquired first frequency band priority list information can be implemented according to the cell reselection mechanism in the prior art, which will not be repeated in this application.
  • the target access network device selected by the terminal according to the first frequency band priority list information supports the access network device of the first network slice, and at the same time, the terminal accesses
  • the radio resource information used by the target access network device is also supported by the first network slice. That is to say, when the first access network device does not support the first network slicing, or when the first wireless resource information of the first access network device does not support the first network slicing, in either case, the terminal according to After the first frequency band priority list information is selected, it is finally possible to access the target access network device through the radio resource information corresponding to the first network slice.
  • the first access network device does not support the first network slice in step 201
  • the target access network device may be a second access network device different from the first accessed network device
  • the target access network device is selected according to the first frequency band priority list information, and the first frequency band priority list information is determined based on the first network slice in step 201. Therefore, the second access network device supports the first network slice in step 201, and the frequency band connected to the second access network device also supports the first network slice in step 201.
  • the terminal can select an access network device that supports the first network slice to access according to the frequency band priority list information. Since frequency band 2 has a higher priority, the terminal can also select an access network device that supports frequency band 2 for access. For example, frequency band 2 can be used to access RAN2.
  • the first access network device supports the first network slice in step 201, and the first wireless resource information (for example, frequency band) selected by the terminal to access the first access network device does not support the first network slice in step 201.
  • the target access network device may be the first access network device, and the terminal uses the second wireless resource information to access the first access network device.
  • the second wireless resource information supports the first network slice in step 201.
  • the first access network device supports the first network slice.
  • the terminal If the first access network equipment RAN2 supports the access of frequency band 1 and frequency band 2, the terminal currently uses frequency band 2 (first radio resource information) to access the first access network equipment RAN2. From the above Table 5, it can be concluded that the first access network device supports the first network slice, and the frequency band 1 does not support the first network slice. The terminal may determine to still access the first access network device according to the frequency band priority list information, and use frequency band 2 with a higher priority to access the first access network device RAN2.
  • the terminal can access the target access network device according to the first frequency band priority list (which can be understood as the second wireless resource information in the first indication information), and successfully register to the network through the target access network device, Access to the network slice corresponding to the Requested NSSAI that initiated the registration process for the second time, that is, access to the first network slice.
  • the first frequency band priority list which can be understood as the second wireless resource information in the first indication information
  • the terminal blindly selects the access network device, which causes the terminal to be unable to access the requested first network slice.
  • the AMF device determines the first RFSP index based on the first network slice, and the terminal obtains the first frequency band priority list information that meets the first network slice based on the first RFSP index, and accesses based on the first frequency band priority list information Target access network equipment. It can be ensured that the terminal is connected to a certain first network slice through the target access network device, and the success rate and efficiency of the terminal's access to the network slice can also be improved.
  • the NAS response message included in the N2 message sent by the AMF device to the first access network device in step 206 is a registration rejection message, and the first indication information included in the registration rejection message It can also be called: the cause value of the failure.
  • the failure reason value can be any of the following:
  • the first access network device currently accessed by the terminal does not support the first network slice; this indication content is generally applicable to the case where the first access network device does not support the first network slice;
  • the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice; this indication content is generally applicable to the information selected by the terminal to access the first access network device The case where the first wireless resource information does not support the first network slicing;
  • the first wireless resource information selected by the terminal to access the first access network device is incorrect; this indication content is generally applicable to the first wireless resource information selected by the terminal to access the first access network device.
  • the NAS response message sent by the first access network device to the terminal in step 207 is a registration rejection message.
  • the terminal learns that the registration has failed, and learns the reason for this registration failure according to the failure reason value included in the registration rejection message, and then executes step 208 and step 209.
  • the terminal blindly selects the access network device and the terminal cannot access the requested first network slice.
  • the core network rejects the registration request of the terminal and informs the terminal of the reason for the failure of this registration. Trigger the terminal to reselect the target access network device and enter the network again.
  • the N2 message in step 206 may not need to include the first Allowed NSSAI notified to the first access network device.
  • FIG. 3 a schematic diagram of another communication flow is provided.
  • the difference between the example in FIG. 3 and the example in FIG. 2 is that the first instruction information in step 206 in the example in FIG. 2 is used to instruct the terminal, and the first instruction information needs to be sent to the terminal.
  • the terminal actively releases the wireless connection;
  • the first indication information in step 306 in the example of FIG. 3 is used to indicate the first access network device, and the first indication information needs to be sent to the first access network device.
  • the indication information will not be in the NAS response message, and the first access network device actively releases the wireless connection.
  • the example of FIG. 3 is the same as the remaining part of the technical details of the example of FIG. 2, and the repetition is not repeated here.
  • Step 301 to step 305 are the same as step 201 to step 205.
  • Step 306 The AMF device sends an N2 message to the first access network device (current RAN), and correspondingly, the first access network device receives the N2 message sent by the AMF device.
  • the N2 message includes at least one of the following: the first Allowed NSSAI, the first RFSP index value, the NAS response message, and the first indication information (indication).
  • the first indication information may instruct the first access network device to release the wireless connection; specifically, the first access network device may release the wireless connection after sending a NAS response message (for example, a registration response message) to the terminal, or After sending the second wireless resource information to the terminal, the first access network device releases the wireless connection.
  • the second wireless resource information may be the first frequency band priority list information corresponding to the first RFSP index value;
  • the first indication information may also indicate any one of the following:
  • the content of the instruction is generally applicable to the case where the first access network device does not support the first network slicing;
  • the first wireless resource information selected by instructing the terminal to access the first access network device does not support the first network slicing; the content of the instruction is generally applicable to the selection by the terminal for accessing the first access network device The first wireless resource information of does not support the first network slicing;
  • the information of the first radio resource selected by instructing the terminal to access the first access network device is wrong.
  • the content of the instruction is generally applicable to the case where the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice.
  • the first indication information may only indicate any one of the above three items: indicating that the first access network device does not support the first network slice; indicating that the terminal accesses the first network slice; The first wireless resource information selected by the network access device does not support the first network slice; the first wireless resource information selected by the first access network device instructed to access the terminal is wrong.
  • the first indication information may also indicate other content, which is not limited in this application. After receiving the first indication information, the first access network device releases the wireless connection. Therefore, it can be understood that the first indication information has a function of instructing the first access network device to release the wireless connection.
  • Step 307 The first access network device sends a NAS response message (for example, a registration response message) to the terminal, and correspondingly, the terminal receives the NAS response message sent by the first access network device. Since the NAS response message in step 306 does not include the first indication information, the NAS response message in step 307 does not include the first indication information.
  • a NAS response message for example, a registration response message
  • the first access network device may also send the first frequency band priority list information to the terminal.
  • the first access network device may actively send the first frequency band priority list information to The terminal may also request to obtain the first frequency band priority list information before sending it to the terminal.
  • Step 308 The first access network device may initiate a wireless connection release (AN release) process according to the first indication information. After this procedure, the terminal releases the RRC link with the current access network device, and enters the idle state idle.
  • AN release wireless connection release
  • step 307 the first access network device does not send the first frequency band priority list information to the terminal
  • step 308 the first access network device sends the first frequency band priority list information to the terminal. Specifically, the first access network device sends the first frequency band priority list information to the UE through an RRC message.
  • Step 309 is the same as step 209.
  • the network side can issue to the terminal the network slice Rejected NSSAI-associated priority list information, and the second Allowed NSSAI-associated second frequency band priority list information for the terminal, the terminal You can choose whether to access the network slice included in the Rejected NSSAI or the network slice included in the second Allowed NSSAI according to your own needs.
  • Step 401 to step 403 are the same as step 201 to step 203.
  • step 404 the AMF device sends a third message to the policy control function PCF device, and correspondingly, the PCF device receives the third message from the AMF device.
  • the third message includes at least one of the following: informing the terminal of the network slice Rejected NSSAI in which the terminal is denied access, informing the terminal of the second Allowed NSSAI in which the terminal is allowed to access, the identity of the terminal, and the contracted RFSP index value.
  • Rejected NSSAI means the network slice that the AMF device rejects terminal access. In fact, it is only to show that the first access network device does not support this network slice. Therefore, the terminal cannot be restricted from accessing this network slice.
  • Rejected NSSAI The name can also be changed to other names without limitation.
  • the methods for AMF to determine the S-NSSAI included in the second Allowed NSSAI may include the following:
  • the AMF informs the terminal of the The identifier of the network slice that the terminal is allowed to access is the identifier of the first network slice, that is, the S-NSSAI included in the second Allowed NSSAI is the S-NSSAI supported by the current RAN in the Requested NSSAI.
  • Requested NSSAI S-NSSAI-1+S-NSSAI-2
  • current RAN RAN1
  • Requested NSSAI S-NSSAI-2
  • current RAN RAN1
  • the AMF methods for determining the S-NSSAI included in the Rejected NSSAI can include the following:
  • the AMF informs the terminal
  • the identifier of the network slice to which the terminal is denied access is the identifier of the first network slice, that is, the S-NSSAI included in Rejected is an S-NSSAI that is not supported by the current RAN in the Requested NSSAI.
  • Requested NSSAI S-NSSAI-1+S-NSSAI-2
  • current RAN RAN1
  • Requested NSSAI S-NSSAI-2
  • current RAN RAN1
  • the identifier of the first network slice that is not supported may also be indicated to notify the terminal through Rejected NSSAI. That is, the S-NSSAI included in the Rejected NSSAI in the third message belongs to the Requested NSSAI.
  • the identification of the first supported network slice may also be indicated to inform the terminal through the second Allowed NSSAI. That is, the S-NSSAI included in the second Allowed NSSAI included in the third message belongs to the Requested NSSAI.
  • the above step 404 can also be replaced with: the AMF device can send two third messages to the PCF device, each including the Rejected NSSAI network slice identifier (that is, the first access network device does not support the The identifier of the first network slice) and the identifier of the network slice included in the second Allowed NSSAI (for example, the identifier of the first network slice supported by the first access network device or the identifier of the default network slice).
  • the AMF device can send two third messages to the PCF device, each including the Rejected NSSAI network slice identifier (that is, the first access network device does not support the The identifier of the first network slice) and the identifier of the network slice included in the second Allowed NSSAI (for example, the identifier of the first network slice supported by the first access network device or the identifier of the default network slice).
  • step 405 the PCF device sends a fourth message to the AMF device, and correspondingly, the AMF device receives the fourth message from the PCF device.
  • the fourth message includes a third RFSP index value and a second RFSP index value.
  • the third RFSP index value is generated based on Rejected NSSAI. Specifically, the third RFSP index value is generated based on Rejected NSSAI and subscribed RFSP Index.
  • the third RFSP index value may also be referred to as the first authorized RFSP index value or the authorized RFSP index value.
  • the second RFSP index value is generated based on the second Allowed NSSAI. Specifically, the second RFSP index value is generated based on the second Allowed NSSAI and the subscribed RFSP Index.
  • the second RFSP index value may also be referred to as the second authorized RFSP index value or the authorized RFSP index value.
  • the content contained in the second Allowed NSSAI in the example of FIG. 2 and FIG. 3 and the second Allowed NSSAI in the example of FIG. 4 may be different, so the determined RFSP index value also passes the first RFSP index value and the first Two RFSP index values make a distinction.
  • step 505 can also be replaced with: the PCF device sends two fourth messages to the AMF device, which respectively include the third RFSP index value and the second RFSP index value.
  • steps 404 and 405 describe the method in which the AMF device obtains the third RFSP index value and the second authorized RFSP index value through the PCF device.
  • the AMF device can also obtain the third RFSP index value and the third RFSP index value through other methods.
  • the authorized RFSP index value For example, the AMF device determines the third RFSP index value by itself based on Rejected NSSAI and subscribed RFSP Index, or the AMF device obtains the third RFSP index value through other devices, which is not limited in this application.
  • the AMF device determines the second RFSP index value by itself based on the second Allowed NSSAI and the subscribed RFSP Index, or the AMF device obtains the second RFSP index value through other devices, which is not limited in this application.
  • Step 406 The AMF device sends an N2 message (N2 message) to the first access network device (current RAN), and correspondingly, the first access network device receives the N2 message from the AMF device.
  • the N2 message includes the second RFSP index value, the third RFSP index value, and the NAS response message.
  • the NAS response message includes one or more of the identifier of the network slice included in the Rejected NSSAI, the identifier of the network slice included in the second Allowed NSSAI, and the third indication information.
  • the third indication information is used to indicate the manner in which the terminal accesses the network slice.
  • the information in the N2 message described above may be sent to the first access network device in one message, or sent to the first access network device in multiple messages.
  • the AMF device may also indicate the correspondence between the third RFSP index value and Rejected NSSAI, and the correspondence between the second RFSP index value and the second Allowed NSSAI, so that the first access network device knows which RFSP index The value is determined based on which network slice.
  • the third indication information includes but is not limited to indicating at least one of the following:
  • Wireless resource information for example, the third frequency band priority list information corresponding to the third RFSP index value; optionally, it may also indicate that the terminal releases the wireless connection after requesting the second wireless resource information;
  • the second radio resource information corresponding to the network slice included in the NSSAI (for example, the first network slice not supported by the first access network device) (for example, the third radio resource information corresponding to the third RFSP index value).
  • Band priority list information (for example, the third radio resource information corresponding to the third RFSP index value).
  • the NAS response message in step 406 may also include the first indication information in step 206 in FIG. 2.
  • the first access network device can send the following information to the terminal: the second frequency band priority list information, the third frequency band priority list information, the identifier of the network slice included in the Rejected NSSAI, and the identifier of the network slice included in the second Allowed NSSAI .
  • the third frequency band priority list information is used for the terminal to access the network slice included in the Rejected NSSAI
  • the second frequency band priority list information is used for the terminal to access the network slice included in the second Allowed NSSAI.
  • the first access network device may also send third indication information to the terminal.
  • the first access network device sends the second frequency band priority list information and the NAS response message (for example, a registration response message) to the terminal.
  • the terminal receives the second frequency band priority list information and/or the NAS response message sent by the first access network device.
  • the second frequency band priority list information and the NAS response message may be sent to the terminal in one message, or may be sent to the terminal in two messages respectively.
  • the first access network device sends an RRC message to the terminal, and the RRC message carries the second frequency band priority list information and/or the NAS response message.
  • step 407a the terminal may determine to acquire the second wireless resource information from the first access network device according to the third indication information. Specifically, the terminal may also send a request message to the first access network device, where the request message carries the identifier of the first network slice (Rejected NSSAI); the request message is used to obtain the second radio resource information.
  • the second wireless resource information is, for example, the third frequency band priority list information corresponding to the third RFSP index value.
  • the terminal may determine whether to obtain the second wireless resource information from the first access network device according to its actual needs. If necessary, the terminal may send the first network slice (Rejected NSSAI) to the first access network device (current RAN) through an RRC message, and the current RAN returns the third frequency band priority list information to the terminal.
  • the terminal may send the first network slice (Rejected NSSAI) to the first access network device (current RAN) through an RRC message, and the current RAN returns the third frequency band priority list information to the terminal.
  • the first access network device may also send the third frequency band priority list information to the terminal. For example, it may be combined with the second frequency band priority list information and the NAS response message in one message. It can be sent to the terminal, or it can be sent to the terminal separately in different messages.
  • Step 408 is the same as step 208: the terminal initiates a radio connection release (AN release) procedure. After the procedure, the terminal releases the RRC connection with the first access network device and enters an idle state.
  • AN release radio connection release
  • Step 409 The terminal selects the target access network device according to the third frequency band priority list information or the second frequency band priority list information, and accesses the first network slice included in the Rejected NSSAI or the network slice included in the second Allowed NSSAI.
  • the terminal selects the target access network device according to the acquired third frequency band priority list information, and initiates the registration process (this is the second registration process initiated). That is, the terminal sends the registration request message again, and the S-NSSAI included in the Requested NSSAI carried in the registration request message is the network slice included in the above Rejected NSSAI.
  • the terminal can access the target access network device according to the priority list of the third frequency band, and successfully register to the network through the target access network device, and access the network slice corresponding to the Requested NSSAI, that is, access to Rejected NSSAI includes the first network slice.
  • the terminal selects the target access network device according to the acquired second frequency band priority list information, and initiates the registration process (this is the second registration process initiated). That is, the terminal sends the registration request message again, and the S-NSSAI included in the Requested NSSAI carried in the registration request message is the network slice included in the aforementioned second Allowed NSSAI.
  • the terminal can access the target access network device according to the second frequency band priority list, and successfully register to the network through the target access network device, and access the network slice corresponding to the Requested NSSAI that initiated the registration process for the second time. Up, that is, access to the network slice included in the second Allowed NSSAI.
  • the terminal blindly selects the access network device and the terminal cannot access the requested first network slice.
  • the AMF device determines the third RFSP index based on Rejected NSSAI and determines the second RFSP index based on the second Allowed NSSAI.
  • the terminal obtains the third frequency band priority list information that satisfies the unsupported first network slice based on the third RFSP index and/or obtains the second frequency band priority list information that satisfies the network slice included in the second Allowed NSSAI based on the second RFSP index, and Access the target access network device based on the third frequency band priority list information or the second frequency band priority list information. It can ensure that the terminal is connected to the network slice included in the Rejected NSSAI or the second Allowed NSSAI through the target access network device, and the success rate and efficiency of the terminal's access to the network slice can also be improved.
  • a communication method which includes the following steps:
  • the difference between the example in Fig. 5 and the example in Fig. 4 is that the NAS response message sent by the AMF device to the terminal includes Rejected NSSAI corresponding to the third frequency band priority Level list information, the terminal does not need to obtain the third frequency band priority list information from the AMF device, and the content of the third indication information will also slightly change.
  • the indication information is called the fourth indication information.
  • Step 501 to step 505 are the same as step 401 to step 405, and the repetition will not be repeated.
  • Step 506 The AMF device sends an N2 message to the first access network device (current RAN), and correspondingly, the first access network device receives the N2 message from the AMF device.
  • the N2 message includes at least one of the following: a second RFSP index value (based on the authorized RFSP Index generated by the second Allowed NSSAI), and a NAS response message.
  • the NAS response message includes at least one of the following: Rejected the identifier of the network slice included in the NSSAI, the identifier of the network slice included in the second Allowed NSSAI, and the third determined based on the third RFSP index value (based on the authorized RFSP Index generated by the Rejected NSSAI) Frequency band priority list information, fourth indication information.
  • the fourth indication information includes but is not limited to indicating at least one of the following:
  • the terminal Instruct the terminal, if the terminal accesses the network slice included in the Rejected NSSAI (the first network slice not supported by the first access network device), the terminal selects the target according to the third frequency band priority list information in the NAS response message Access network equipment;
  • the NAS response message in step 506 may also include the first indication information in step 206 in FIG. 2.
  • the AMF device may be configured with frequency band priority list information corresponding to the RFSP index value.
  • the AMF device may determine the third frequency band priority list information corresponding to the third RFSP index value according to its own configuration.
  • the AMF device can store the corresponding relationship between the RFSP index value and the frequency band priority list information, and the AMF device determines the third frequency band priority list information corresponding to the RFSP index value according to its own configuration.
  • step 506a the AMF device obtains the third frequency band priority list information corresponding to the third RFSP index value from the first access network device. Specifically, it can include the following steps:
  • the AMF device sends a frequency request (frequency request) to the first access network device.
  • the first access network device receives a frequency request (frequency request) sent by the AMF device, and the frequency request includes the third RFSP index value.
  • the first access network device determines the third frequency band priority list information corresponding to the third RFSP index value according to the correspondence between the locally configured RFSP index value and the frequency band priority list information.
  • the first access network device sends a frequency response (frequency response) to the AMF device, and correspondingly, the AMF device receives the frequency response (frequency response) sent from the first access network device, and the frequency response includes the third RFSP index value corresponding Priority list information of the third frequency band.
  • Step 507 The first access network device sends the second frequency band priority list information and/or NAS response message (for example, registration response message) to the terminal.
  • the terminal receives the second frequency band priority list information and/or the NAS response message sent by the first access network device.
  • Step 508 is the same as step 408, and step 509 is the same as step 409.
  • the terminal blindly selects the access network device and the terminal cannot access the requested first network slice.
  • the AMF device determines the third RFSP index based on Rejected NSSAI and determines the second RFSP based on the second Allowed NSSAI. index.
  • the terminal obtains the third frequency band priority list information that satisfies the unsupported first network slice based on the third RFSP index and/or obtains the second frequency band priority list information that satisfies the second Allowed NSSAI network slice based on the second RFSP index, and based on this
  • the third frequency band priority list information or the second frequency band priority list information is accessed to the target access network device. It can ensure that the terminal is connected to the Rejected NSSAI or the second Allowed NSSAI network slice through the target access network device, and the success rate and efficiency of the terminal's access to the network slice can also be improved.
  • the N2 message sent by the AMF device to the first access network device includes: a NAS response message (for example, a registration response message), and the NAS response message includes: Rejected the identifier of the network slice included in the NSSAI , The identifier of the network slice included in the second Allowed NSSAI, the third frequency band priority list information corresponding to the third RFSP index value, and the second frequency band priority list information corresponding to the second RFSP index value.
  • the first access network device may no longer need to send the second frequency band priority list information corresponding to the second RFSP index value to the terminal.
  • the AMF device can locally configure the second frequency band priority list information corresponding to the second RFSP index value, or the AMF device may request the first access network device for the second frequency band priority list information corresponding to the second RFSP index value, the specific process
  • the principle is the same as that of step 506a, and the repetition is not repeated here.
  • the N2 message sent by the AMF device to the first access network device includes: the third RFSP index value and the NAS response message (for example, a registration response message).
  • the NAS response message includes: the identifier of the network slice included in the Rejected NSSAI, the identifier of the network slice included in the second Allowed NSSAI, and the second frequency band priority list information corresponding to the second RFSP index value.
  • the third indication information in step 406 may also be included.
  • the AMF device can locally configure the second frequency band priority list information corresponding to the second RFSP index value, or the AMF device may request the first access network device for the second frequency band priority corresponding to the second RFSP index value.
  • the specific process is the same as that of step 506a, and the repetition is not repeated here.
  • the first access network device can actively send the second frequency band priority list information corresponding to the RFSP index value to the terminal, or it can wait for the terminal’s request before sending the third frequency band to the terminal Priority list information.
  • the AMF device receives a first message from the terminal from the first access network device, the first message includes the identification of the first network slice that the terminal requests to access; for this process, please refer to the above steps 201 and 301 , Step 401, Step 501.
  • the first message may also be a NAS request message, and specifically may be a registration request message, and the rest of the repetition will not be repeated.
  • the AMF device determines that the first access network device does not support the first network slicing; this process can refer to the above step 202, step 302, step 402, and step 502, and the repetition is not repeated.
  • the AMF device sends a second message to the first communication device, the second message includes: second wireless resource information, and the second wireless resource information is used by the terminal to select a second access network device, so The second access network device supports the first network slice, and the first communication device is the first access network device or the terminal.
  • the process of sending the second message by the AMF device to the first communication device reference may be made to step 206, step 306, step 406, and step 506 above.
  • the second wireless resource information may be an RFSP index value.
  • the RFSP index value may specifically be the first RFSP index value in the examples of FIG. 2 and FIG. 3 above. For details, refer to the first RFSP index value in step 206 and step 306.
  • the first access network device may determine the first frequency band priority list information corresponding to the first RFSP index value, and send the first frequency band priority list information to the terminal. For the process in which the first access network device sends the first frequency band priority list information to the terminal, refer to the foregoing step 207 and step 307.
  • the RFSP index value may also be the second RFSP index value and the third RFSP index value in FIG. 4 and FIG. 2. RFSP index value.
  • the first access network device may determine the second frequency band priority list information corresponding to the second RFSP index value and/or the third frequency band priority list information corresponding to the third RFSP index value, and combine the second priority list information and/or Or the third frequency band priority list information is sent to the terminal.
  • the second message may be an N2 message.
  • the second wireless resource information may be frequency band priority list information.
  • the frequency band priority list information may specifically be the third frequency band priority list information in the example shown in FIG. 5 above. For details, refer to the third frequency band priority list information in 506.
  • the second message may be an N2 message or a NAS response message.
  • the NAS response message may specifically be a registration response message, such as a registration acceptance message or a registration rejection message.
  • the first network slice is a network slice that the AMF device allows the terminal to access, or is a network slice that the AMF device rejects the terminal to access.
  • the second Allowed NSSAI Requested NSSAI in the registration response messages in step 206 and step 306, that is, the first network slice is the network slice that the AMF device allows the terminal to access.
  • Rejected NSSAI is the first network slice that is not supported by the first access network device in Requested NSSAI
  • the second Allowed NSSAI may be the first network slice supported by the first access network device of Requested NSSAI .
  • Rejected NSSAI here means that the AMF device refuses terminal access to the network slices contained in Rejected NSSAI. In fact, it is only to show that the first access network device does not support the network slices contained in Rejected NSSAI and cannot be restricted accordingly. The terminal cannot access the network slice contained in the Rejected NSSAI.
  • the second message further includes: first indication information
  • the first indication information is used to indicate at least one of the following: instruct the terminal to release the wireless connection; instruct the terminal to enter the idle state, initiate a registration process; instruct all The first access network device currently accessed by the terminal does not support the first network slice; the terminal is instructed to access the first network slice according to the second wireless resource information, the first network slice Associated with the second wireless resource information. See the description in step 206 above.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; instruct the first The access network device does not support the first network slice. See the description in step 306 above.
  • the AMF device sends a third message to the policy control function PCF device, the third message includes the first network slice; the AMF device receives the fourth message from the PCF device, so The fourth message includes the RFSP index value.
  • the fourth message includes the RFSP index value.
  • the first RFSP index value described in step 204, step 205, step 304, and step 305 and the repetition will not be repeated.
  • This process can also refer to the second RFSP index value and the third RFSP index value described in step 404, step 405, step 504, and step 505, and the repetition will not be repeated.
  • the AMF device receives a first message from the terminal from the first access network device, the first message includes the identification of the first network slice that the terminal requests to access; for this process, please refer to the above steps 201 and 301 , Step 401, Step 501.
  • the first message may also be a NAS request message, and specifically may be a registration request message, and the rest of the repetition will not be repeated.
  • the AMF device determines that the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice; for this process, please refer to the above step 202, step 302, and step 402. Step 502, the repetition is not repeated here.
  • the AMF device sends a second message to the first communication device, the second message including: second wireless resource information, and the second wireless resource information is used by the terminal to receive information according to the second wireless resource information.
  • the first access network device supports the first network slice; the first communication device is the first access network device or the terminal.
  • the second wireless resource information may be an RFSP index value.
  • the RFSP index value may specifically be the first RFSP index value in the examples of FIG. 2 and FIG. 3 above. For details, refer to the first RFSP index value in step 206 and step 306.
  • the first access network device may determine the first frequency band priority list information corresponding to the first RFSP index value, and send the first frequency band priority list information to the terminal. For the process in which the first access network device sends the first frequency band priority list information to the terminal, refer to the foregoing step 207 and step 307.
  • the RFSP index value may also be the second RFSP index value and the third RFSP index value in FIG. 4 and FIG. 2. RFSP index value.
  • the first access network device may determine the second frequency band priority list information corresponding to the second RFSP index value and/or the third frequency band priority list information corresponding to the third RFSP index value, and combine the second priority list information and/or Or the third frequency band priority list information is sent to the terminal.
  • the second message may be an N2 message.
  • the second wireless resource information may be frequency band priority list information, and the frequency band priority list information may specifically be the third frequency band priority list information in the example of FIG. 5 above. .
  • the second message may be an N2 message or a NAS response message.
  • the NAS response message may specifically be a registration response message, such as a registration acceptance message or a registration rejection message.
  • the AMF device receives the first wireless resource information from the first access network device.
  • the AMF device receives the first wireless resource information from the first access network device.
  • the repetition please refer to the above-mentioned step 202a, step 302a, step 402a, and step 502a, and the repetition will not be repeated.
  • the first network slice is a network slice that the AMF device allows the terminal to access, or is a network slice that the AMF device rejects the terminal to access.
  • the second Allowed NSSAI Requested NSSAI in the registration response messages of step 206 and step 306, that is, the first network slice is the network slice that the AMF device allows the terminal to access.
  • Rejected NSSAI is the first network slice that is not supported by the first access network device in Requested NSSAI
  • the second Allowed NSSAI may be the first network slice supported by the first access network device of Requested NSSAI .
  • Rejected NSSAI here means that the AMF device refuses terminal access to the network slices contained in Rejected NSSAI. In fact, it is only to show that the first access network device does not support the network slices contained in Rejected NSSAI and cannot be restricted accordingly. The terminal cannot access the network slice contained in the Rejected NSSAI.
  • the second message further includes: first indication information
  • the first indication information is used to indicate at least one of the following: instruct the terminal to release the wireless connection; instruct the terminal to enter the idle state, initiate a registration process; instruct all The first wireless resource information selected by the terminal to access the first access network device does not support the first network slice; instructs the terminal to access the first network slice selected by the first access network device The first wireless resource information is wrong; the terminal is instructed to access the first network slice according to the second wireless resource information, and the first network slice is associated with the second wireless resource information. See the description in step 206 above.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; instruct the terminal to connect The first wireless resource information selected by the first access network device does not support the first network slice; the terminal is instructed to access the first wireless resource selected by the first access network device Resource information is wrong. See the description in step 306 above.
  • the AMF device sends a third message to the policy control function PCF device, the third message includes the first network slice; the AMF device receives the fourth message from the PCF device, so The fourth message includes the RFSP index value.
  • the fourth message includes the RFSP index value.
  • the first RFSP index value described in step 204, step 205, step 304, and step 305 and the repetition will not be repeated.
  • This process can also refer to the second RFSP index value and the third RFSP index value described in step 404, step 405, step 504, and step 505, and the repetition will not be repeated.
  • the terminal sends a first message to the AMF device through the first access network device.
  • the first message includes the identifier of the first network slice that the terminal requests to access; for this process, please refer to the above steps 201, 301, and 301. Step 401 and step 501.
  • the first message may also be a NAS request message, and specifically may be a registration request message, and the rest of the repetition will not be repeated.
  • the terminal receives second wireless resource information, and the second wireless resource information is associated with the first network slice; the second wireless resource information may be the first frequency band priority list in step 207 and step 307.
  • the terminal receives the first indication information from the AMF device.
  • the terminal receives the first indication information from the AMF device.
  • the first indication information in the NAS response message in step 206 and step 207 above.
  • the second radio resource information and the first indication information may be received in the same message or in different messages.
  • the first indication information is used to indicate at least one of the following: instruct the terminal to release the wireless connection; instruct the terminal to initiate a registration process after entering an idle state; and indicate the first access network that the terminal is currently accessing
  • the device does not support the first network slice; the first wireless resource information selected by the device instructing the terminal to access the first access network does not support the first network slice; instructing the terminal to access the The first wireless resource information selected by the first access network device is wrong; and the terminal is instructed to access the first network slice according to the second wireless resource information.
  • the first access network device does not support the first network slice; the terminal selects a second access network device according to the second wireless resource information, and the second access network device Support the first network slicing.
  • the specific process please refer to the description of step 209, step 309, step 409, and step 509, and the repetition will not be repeated.
  • the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice, and the terminal accesses the first network slice according to the second wireless resource information.
  • the first access network device supports the first network slice.
  • the specific process please refer to the description of step 209, step 309, step 409, and step 509, and the repetition will not be repeated.
  • the terminal initiates a wireless connection release procedure and enters an idle state.
  • the terminal refers to the descriptions of step 208, (in step 308, the first access network device initiates the wireless connection release process), step 408, and step 508, and the repetition is not repeated here.
  • a registration process is initiated, and the first network slice is accessed according to the second radio resource.
  • step 209, step 309, step 409, and step 509 please refer to the description of step 209, step 309, step 409, and step 509, and the repetition will not be repeated.
  • the terminal receives the second radio resource information from the AMF device from the first access network device.
  • the AMF device carries the third frequency band priority list information from the NAS response message through the first access network device.
  • the terminal receives second wireless resource information from the first access network device.
  • the second wireless resource information refer to the first access network device sending the first frequency band priority list information to the terminal in step 207 and step 307; for the second wireless resource information, refer to the first access network device to the terminal in step 407a.
  • the third frequency band priority list information is sent, and the second wireless resource information may also refer to the second frequency band priority list information sent by the first access network device to the terminal in step 507, and the repetition will not be repeated here.
  • the terminal before the terminal receives the second radio resource information from the first access network device, the terminal sends a request message to the first access network device, and the request message carries the The identifier of the first network slice; the request message is used to obtain the second wireless resource information.
  • the terminal sends a request message to the first access network device, and the request message carries the The identifier of the first network slice; the request message is used to obtain the second wireless resource information.
  • the first access network device receives the first message from the terminal, and sends the first message to the access and mobility management function AMF device.
  • the first message includes the first network that the terminal requests to access.
  • the identification of the slice; this process can refer to the above step 201, step 301, step 401, and step 501.
  • the first message may also be a NAS request message, and specifically may be a registration request message, and the rest of the repetition will not be repeated.
  • the first access network device receives a second message from the AMF device, the second message includes second wireless resource information and first indication information, and the second wireless resource information and the first Associated with network slices.
  • the second wireless resource information may be an RFSP index value.
  • the RFSP index value may specifically be the first RFSP index value in the above examples of FIG. 2 and FIG. 3.
  • the first access network device may determine the first frequency band priority list information corresponding to the first RFSP index value, and send the first frequency band priority list information to the terminal. For the process in which the first access network device sends the first frequency band priority list information to the terminal, refer to the foregoing step 207 and step 307.
  • the RFSP index value may also be the second RFSP index value and the third RFSP index value in FIG. 4 and FIG. 2.
  • the first access network device may determine the second frequency band priority list information corresponding to the second RFSP index value and/or the third frequency band priority list information corresponding to the third RFSP index value, and combine the second priority list information and/or Or the third frequency band priority list information is sent to the terminal.
  • the second message may be an N2 message.
  • the first indication information is used to indicate at least one of the following: instruct the first access network device to release the wireless connection; indicate that the first access network device does not support the first network slice; instruct the terminal to connect The first wireless resource information selected by the first access network device does not support the first network slice; the terminal is instructed to access the first wireless resource selected by the first access network device Resource information is wrong. See the description in step 306 above.
  • the second wireless resource information is used by the terminal to select a second access network device, the second access network device supports the first network slice, and the first access network device The first network slice is not supported; or, the second radio resource information is used by the terminal to select a first access network device, and the first access network device supports the first network slice, and the terminal The first radio resource information selected by the device to access the first access network does not support the first network slice.
  • the first access network device releases the wireless connection. For details, refer to the process of step 308, where the first access network device initiates the process of releasing the wireless connection.
  • the first access network device sends the first wireless resource information selected by the terminal to access the first access network device to the AMF device.
  • the AMF device For the specific process, refer to the processes of step 202a, step 302a, step 402a, and step 502a described above.
  • the second wireless resource information received by the first access network device is an RFSP index value
  • the first access network device sends the RFSP to the terminal or the AMF device
  • the RFSP index value is the first RFSP index value in the examples of FIG. 2 and FIG. 3 above.
  • the first access network device may determine the first frequency band priority list information corresponding to the first RFSP index value, and send the first frequency band priority list information to the terminal.
  • the process in which the first access network device sends the first frequency band priority list information to the terminal refer to the foregoing step 207 and step 307.
  • the RFSP index value may also be the second RFSP index value and the third RFSP index value in FIG. 4 and FIG. 2.
  • the first access network device may determine the second frequency band priority list information corresponding to the second RFSP index value and/or the third frequency band priority list information corresponding to the third RFSP index value, and combine the second priority list information and/or Or the third frequency band priority list information is sent to the terminal.
  • the first access network device sends the second frequency band priority list information and/or the third frequency band priority list information to the terminal, refer to the foregoing step 407a and step 507.
  • the first access network device sends the third RFSP index value corresponding to the third RFSP index value to the AMF device. Band priority list information. The repetition will not be repeated.
  • the first access network device before the first access network device sends the frequency band priority list information corresponding to the RFSP index value to the terminal, the first access network device receives the request message sent by the terminal,
  • the request message carries the identifier of the first network slice; the request message is used to obtain the second wireless resource information, and the second wireless resource information used by the request message is frequency band priority list information .
  • the repetitive parts please refer to the description at step 407a above, and the repetitive parts will not be repeated.
  • the device 600 may include: a transceiver module 620, a processing module 610, and optionally, a storage module 630; processing The module 610 may be connected to the storage module 630 and the transceiver module 620 respectively, and the storage module 630 may also be connected to the transceiver module 620.
  • the storage module 630 may include one or more memories, and the memories may be devices for storing programs or data in one or more devices or circuits.
  • the storage module 630 may store computer-executable instructions of the foregoing communication method, so that the processing module 610 executes the method in the foregoing embodiment.
  • the storage module 630 may be a register, a cache, a RAM, etc., and the storage module 630 may be integrated with the processing module 610.
  • the storage module 630 may be a ROM or another type of static storage device that can store static information and instructions, and the storage module 630 may be independent of the processing module 610.
  • the transceiver module 620 may be an input or output interface, pin or circuit, or the like.
  • the apparatus 600 can execute the steps performed by the AMF device in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the apparatus 600 may be an AMF device or a chip applied in the AMF device.
  • the transceiver module 620 is configured to receive a first message from a terminal from a first access network device, and the first message includes an identifier of the first network slice that the terminal requests to access;
  • the processing module 610 is configured to determine that the first access network device does not support the first network slice;
  • the transceiving module 620 is also configured to send a second message to the first communication device, the second message including : Second wireless resource information, the second wireless resource information is used by the terminal to select a second access network device, the second access network device supports the first network slice, and the first communication device is The first access network device or the terminal.
  • the transceiver module 620 is configured to receive a first message from a terminal from a first access network device, and the first message includes an identifier of the first network slice that the terminal requests to access;
  • the processing module 610 is configured to determine that the first wireless resource information selected by the terminal to access the first access network device does not support the first network slice;
  • the transceiver module 620 is also configured to send The communication device sends a second message, the second message includes: second wireless resource information, the second wireless resource information is used by the terminal to access the first access network device according to the second wireless resource information ,
  • the first access network device supports the first network slice; the first communication device is the first access network device or the terminal.
  • the transceiver module 620 is further configured to receive the first wireless resource information from the first access network device.
  • the transceiver module 620 is further configured to send a third message to a policy control function PCF device, where the third message includes the first network slice; receive a fourth message from the PCF device, The fourth message includes the RFSP index value.
  • the storage module 630 is configured to store the second wireless resource information, the first indication information, and so on.
  • the device 600 can execute the steps performed by the terminal in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the device 600 may be a terminal or a chip applied in the terminal.
  • the transceiving module 620 is configured to send a first message to the access and mobility management function AMF device through the first access network device, and the first message includes the first message that the device requests to access.
  • An identifier of a network slice; and receiving second wireless resource information, where the second wireless resource information is associated with the first network slice; receiving first indication information from the AMF device, where the first indication information is used Indicate at least one of the following:
  • the first access network device does not support the first network slice; the processing module 610 is configured to select a second access network device according to the second wireless resource information, and the first access network device The second access network device supports the first network slice.
  • the first wireless resource information selected by the apparatus to access the first access network device does not support the first network slice
  • the processing module 610 is configured to perform according to the second wireless The resource information is accessed to the first access network device, and the first access network device supports the first network slice.
  • the processing module 610 is configured to initiate a wireless connection release procedure, after entering an idle state, initiate a registration procedure, and access the first network slice according to the second wireless resource.
  • the transceiver module 620 when used to receive the second wireless resource information, it is specifically configured to: receive the second wireless resource information from the AMF device from the first access network device; or, Receiving second radio resource information from the first access network device.
  • the transceiver module 620 is further configured to send a request message to the first access network device before being used to receive the second wireless resource information from the first access network device, so The request message carries the identifier of the first network slice; the request message is used to obtain the second radio resource information.
  • the storage module 630 is configured to store the second wireless resource information, the first indication information, and so on.
  • the apparatus 600 can execute the steps performed by the first access network device in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the apparatus 600 may be a first access network device, or may be a chip applied in the first access network device.
  • the transceiving module 620 is configured to receive a first message from a terminal, and send the first message to an AMF device with an access and mobility management function, and the first message includes the terminal request The identifier of the first network slice to be accessed; and receiving a second message from the AMF device, the second message including second wireless resource information and first indication information, the second wireless resource information and the first A network slice is associated;
  • the first indication information is used to indicate at least one of the following:
  • the information of the first wireless resource selected by instructing the terminal to access the device is wrong.
  • the processing module 610 is used to release the wireless connection.
  • the transceiver module 620 is further configured to send the first wireless resource information selected by the terminal to access the apparatus to the AMF device.
  • the second wireless resource information received by the apparatus is an RFSP index value; the transceiver module 620 is further configured to send the corresponding RFSP index value to the terminal or the AMF device Band priority list information.
  • the transceiver module 620 before the transceiver module 620 is configured to send the frequency band priority list information corresponding to the RFSP index value to the terminal, it is also configured to receive a request message sent by the terminal, where the request message carries The identifier of the first network slice; the request message is used to obtain the second wireless resource information, and the second wireless resource information used by the request message is the frequency band priority list information.
  • the storage module 630 is configured to store the second wireless resource information, the first indication information, and so on.
  • FIG. 7 is a schematic block diagram of a communication apparatus 700 according to an embodiment of the present application.
  • the device 700 includes a processor 710 and a transceiver 720, and optionally, a memory 730.
  • the transceiver can be used to receive program instructions and transmit them to the processor, or the transceiver can be used to communicate and interact with other communication devices, such as interactive control signaling and/or service data.
  • the transceiver may be a code and/or data read-write transceiver, or the transceiver may be a signal transmission transceiver between the communication processor and the transceiver.
  • the processor 710 and the memory 730 are electrically coupled.
  • the memory 730 is used to store a computer program; the processor 710 may be used to call the computer program or instructions stored in the memory to execute the above-mentioned communication method, or to execute the above-mentioned communication method through the transceiver 720. Method of communication.
  • the processing module 610 in FIG. 6 may be implemented by the processor 710, the transceiver module 620 may be implemented by the transceiver 720, and the storage module 630 may be implemented by the memory 730.
  • the apparatus 700 can execute the steps performed by the AMF device in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the apparatus 700 may be an AMF device or a chip applied in the AMF device.
  • the transceiver 720 is configured to receive a first message from a terminal from a first access network device, and the first message includes the identifier of the first network slice that the terminal requests to access;
  • the processor 710 is configured to determine that the first access network device does not support the first network slice;
  • the transceiver 720 is further configured to send a second message to the first communication device, where the second message includes : Second wireless resource information, the second wireless resource information is used by the terminal to select a second access network device, the second access network device supports the first network slice, and the first communication device is The first access network device or the terminal.
  • the transceiver 720 is configured to receive a first message from a terminal from a first access network device, and the first message includes the identifier of the first network slice that the terminal requests to access;
  • the processor 710 is configured to determine that the first wireless resource information selected by the terminal to access the first access network device does not support the first network slicing;
  • the transceiver 720 is also configured to send The communication device sends a second message, the second message includes: second wireless resource information, the second wireless resource information is used by the terminal to access the first access network device according to the second wireless resource information ,
  • the first access network device supports the first network slice; the first communication device is the first access network device or the terminal.
  • the transceiver 720 is further configured to receive the first wireless resource information from the first access network device.
  • the transceiver 720 is further configured to send a third message to a policy control function PCF device, where the third message includes the first network slice; receive a fourth message from the PCF device, The fourth message includes the RFSP index value.
  • the memory 730 is configured to store the second wireless resource information, the first indication information, and so on.
  • the apparatus 700 can execute the steps performed by the terminal in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the apparatus 700 may be a terminal or a chip applied in the terminal.
  • the transceiver 720 is configured to send a first message to the access and mobility management function AMF device through the first access network device, and the first message includes the first message that the apparatus requests access to.
  • the first access network device does not support the first network slice; the processor 710 is configured to select a second access network device according to the second radio resource information, and the first access network device The second access network device supports the first network slice.
  • the first wireless resource information selected by the apparatus to access the first access network device does not support the first network slice
  • the processor 710 is configured to perform the The resource information is accessed to the first access network device, and the first access network device supports the first network slice.
  • the processor 710 is configured to initiate a wireless connection release procedure, after entering an idle state, initiate a registration procedure, and access the first network slice according to the second wireless resource.
  • the transceiver 720 when used to receive the second wireless resource information, it is specifically used to: receive the second wireless resource information from the AMF device from the first access network device; or, Receiving second radio resource information from the first access network device.
  • the transceiver 720 is further configured to send a request message to the first access network device before being used to receive the second wireless resource information from the first access network device, so The request message carries the identifier of the first network slice; the request message is used to obtain the second radio resource information.
  • the memory 730 is configured to store the second wireless resource information, the first indication information, and so on.
  • the apparatus 700 can execute the steps performed by the first access network device in the methods of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 described above.
  • the apparatus 700 may be a first access network device, or may be a chip applied to the first access network device.
  • the transceiver 720 is configured to receive a first message from a terminal, and send the first message to an access and mobility management function AMF device, and the first message includes the terminal request The identifier of the first network slice to be accessed; and receiving a second message from the AMF device, the second message including second wireless resource information and first indication information, the second wireless resource information and the first A network slice is associated;
  • the first indication information is used to indicate at least one of the following:
  • the information of the first wireless resource selected by instructing the terminal to access the device is wrong.
  • the processor 710 is configured to release a wireless connection.
  • the transceiver 720 is further configured to send the first wireless resource information selected by the terminal to access the apparatus to the AMF device.
  • the second wireless resource information received by the apparatus is an RFSP index value; the transceiver 720 is further configured to send the corresponding RFSP index value to the terminal or the AMF device Band priority list information.
  • the transceiver 720 before the transceiver 720 is used to send the frequency band priority list information corresponding to the RFSP index value to the terminal, it is also used to receive a request message sent by the terminal, where the request message carries The identifier of the first network slice; the request message is used to obtain the second wireless resource information, and the second wireless resource information used by the request message is the frequency band priority list information.
  • the memory 730 is configured to store the second wireless resource information, the first indication information, and so on.
  • the aforementioned processor may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor may further include a hardware chip or other general-purpose processors.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (generic array logic, GAL) and other programmable logic devices , Discrete gates or transistor logic devices, discrete hardware components, etc. or any combination thereof.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile 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), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the transceiver device, the interface circuit, or the transceiver described in the embodiments of the present application may include a separate transmitter, and/or a separate receiver, or the transmitter and the receiver may be integrated.
  • the transceiver, the interface circuit, or the transceiver can work under the instruction of the corresponding processor.
  • the transmitter may correspond to the transmitter in the physical device
  • the receiver may correspond to the receiver in the physical device.
  • the embodiment of the present application also provides a computer-readable storage medium that stores a computer program.
  • the computer program When the computer program is executed by a computer, the computer can be used to execute the above-mentioned communication method. For example, the communication method in the examples of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 is performed.
  • the embodiments of the present application also provide a computer program product containing instructions, which when running on a computer, enable the computer to execute the communication method provided above. For example, the communication method in the examples of FIG. 2, FIG. 3, FIG. 4, and FIG. 5 is performed.
  • An embodiment of the present application also provides a communication system.
  • the communication system includes: an AMF device and a first access network device that perform the above-mentioned communication method.
  • it may also include a terminal.
  • it may also include a PCF device.
  • this application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
  • the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
  • These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
  • the instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

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Abstract

本申请涉及通信技术领域，公开了一种通信的方法及装置，用以解决终端无法接入到请求接入的网络切片的问题。AMF设备确定第一接入网设备不支持第一网络切片，或终端接入第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片时，AMF设备向终端或第一接入网设备发送第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，或者用于终端根据第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。终端可以接入到支持第一网络切片的接入网设备上，以及接入到支持第一网络切片的第二无线资源信息上，则终端可以接入到请求接入的第一网络切片上。

Description

一种通信的方法及装置
相关申请的交叉引用
本申请要求在2020年05月15日提交中国知识产权局、申请号为202010413661.2、申请名称为“一种通信的方法及装置”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
本申请实施例涉及通信技术领域，尤其涉及一种通信的方法及装置。
背景技术
物理网络可以被抽象划分成多个网络切片(network slice)，每个网络切片构成一个端到端的逻辑网络，不同网络切片之间在逻辑上是隔离的。每个网络切片可以按照需求，灵活地提供一种或多种网络服务，并且和其它网络切片互不影响。目前定义的标准的网络切片类型包括增强的移动宽带(enhanced mobile broadband，eMBB)、超低时延超高可靠性通信(ultra-reliable and low-latency communication，URLLC)和海量物联网(massive internet of things，MIoT)。通常情况下，不同的网络切片的性能要求不同，如增强实现(augmented reality，AR)业务或虚拟实现(virtual reality，VR)业务的网络切片要求大带宽、低时延；物联网(internet of things，IOT)业务的网络切片要求支持海量终端接入，但带宽小且对时延无要求。
考虑到各种网络切片的性能要求不同，不同网络切片所对应的需要接入的无线资源(例如频率或频段)可能有所不同。例如，对于eMBB类型的网络切片，需要从2.6GHz或4.9GHz接入；而对于URLLC类型的网络切片，需要从4.9GHz接入。或者，不同的网络切片所对应的需要接入的接入网设备可能也有所不同。例如，接入网设备1支持网络切片MIoT的接入，接入网设备1不支持网络切片URLLC的接入。
终端在请求接入网络切片a时，一种可能的情况下是终端当前接入的接入网设备不支持该网络切片a，或者终端当前接入的接入网设备支持该网络切片a，但是终端接入该接入网设备的无线资源不支持该网络切片a。这两种情况下，均会导致终端无法正常接入到请求接入的网络切片a上。进而也就存在终端盲选接入网设备和无线资源，而导致终端成功接入网络切片的几率较小且成功接入网络切片的速度较慢的问题。
发明内容
本申请实施例提供一种通信的方法及装置，用以解决终端无法正常接入到请求接入的网络切片上的问题。
第一方面，提供了一种通信的方法，应用于接入与移动性管理功能(access and mobility management function，AMF)设备。首先，AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识。其次，所述AMF设备确定所述第一接入网设备不支持所述第一网络切片。然后，所述AMF设备向第一通 信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。
现有技术中，通常终端盲选接入网设备而导致终端无法接入到请求的第一网络切片上。在本实施例中，AMF设备基于终端请求接入的第一网络切片确定第二无线资源信息，在当前接入的第一接入网设备不支持所述第一网络切片时，终端基于第二无线资源信息接入第二接入网设备。由于第二接入网设备是根据第二无线资源信息确定的，且第二无线资源信息是根据第一网络切片确定的，从而可以保证终端通过第二接入网设备接入到第一网络切片上，也可以提高终端接入网络切片的成功率和效率。
在一种可能的实现中，当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息可以为无线接入技术/频点优先选择索引值(radio access technology/frequency selection priority index，RFSP Index)。进一步地，第一接入网设备可以确定RFSP索引值对应的频段优先级列表信息，并将频段优先级列表信息发送给终端。从而终端可以根据频段优先级列表信息接入第二接入网设备，进而通过第二接入网设备接入到第一网络切片上。
在一种可能的实现中，当所述第一通信设备为所述终端时，所述第二无线资源信息可以为频段优先级列表信息。AMF设备直接将频段优先级列表信息发送给终端，从而终端可以根据频段优先级列表信息接入第二接入网设备，进而通过第二接入网设备接入到第一网络切片上。
在一种可能的实现中，所述第一网络切片为所述AMF设备允许所述终端接入的网络切片，或者为所述AMF设备拒绝所述终端接入的网络切片。拒绝终端接入第一网络切片，实际上仅是为了说明第一接入网设备不支持第一网络切片，不能因此限定终端不能接入第一网络切片。
在一种可能的实现中，所述第二消息还可以包括：第一指示信息；当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述第一接入网设备不支持所述第一网络切片。
在一种可能的实现中，所述AMF设备还可以向策略控制功能PCF设备发送第三消息，所述第三消息可以包括所述第一网络切片的标识；所述AMF设备还可以接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。AMF设备从PCF设备处获取RFSP索引值，以便后续将RFSP索引值发送给第一接入网设备或者确定RFSP索引值对应的频段优先级列表信息并发送给终端。RFSP索引值可以根据所述第一网络切片的标识确定，进而终端可以根据由RFSP索引值确定的频段优先级列表信息接入第一网络切片。
第二方面，提供了一种通信的方法，应用于AMF设备。首先，AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识。其次，所述AMF设备确定所述终端接入所述第一接入网设备所选择的第一无线资 源信息不支持所述第一网络切片。然后，所述AMF设备向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一接入网设备或所述终端。
现有技术中，通常终端盲选接入网设备以及无线资源信息而导致终端无法接入到请求的第一网络切片上。在本实施例中，AMF设备基于第一网络切片确定第二无线资源信息，在当前接入第一接入网设备选择的第一无线资源信息不支持所述第一网络切片时，终端基于第二无线资源信息接入第一接入网设备。由于第二无线资源信息是根据第一网络切片确定的，从而可以保证终端通过第二无线资源信息，通过第一接入网设备接入到第一网络切片上，也可以提高终端接入网络切片的成功率和效率。
在一种可能的实现中，当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息可以为RFSP索引值。进一步地，第一接入网设备可以确定RFSP索引值对应的频段优先级列表信息，并将频段优先级列表信息发送给终端。从而终端可以根据频段优先级列表信息接入第一接入网设备，进而通过第一接入网设备接入到第一网络切片上。
在一种可能的实现中，当所述第一通信设备为所述终端时，所述第二无线资源信息可以为频段优先级列表信息。AMF设备直接将频段优先级列表信息发送给终端，从而终端可以根据频段优先级列表信息接入第一接入网设备，进而通过第一接入网设备接入到第一网络切片上。
在一种可能的实现中，所述AMF设备还可以接收来自所述第一接入网设备的所述第一无线资源信息。也就是终端接入第一接入网设备所选择的第一无线资源信息是从第一接入网设备处获取的。
在一种可能的实现中，所述第一网络切片为所述AMF设备允许所述终端接入的网络切片，或者为所述AMF设备拒绝所述终端接入的网络切片。拒绝终端接入第一网络切片，实际上仅是为了说明第一接入网设备不支持第一网络切片，不能因此限定终端不能接入第一网络切片。
在一种可能的实现中，所述第二消息还包括：第一指示信息；当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。
在一种可能的实现中，所述AMF设备还可以向策略控制功能PCF设备发送第三消息，所述第三消息可以包括所述第一网络切片的标识；所述AMF设备还可以接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。AMF设备从PCF设备处获取RFSP索引值，以便后续将RFSP索引值发送给第一接入网设备或者确定RFSP索引值对应的频段优先级列表信息并发送给终端。RFSP索引值可以根据所述第一网络切片的标识确定， 进而终端可以根据由RFSP索引值确定的频段优先级列表信息接入第一网络切片。
第三方面，提供了一种通信的方法，应用于终端。首先，终端通过第一接入网设备向AMF设备发送第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识。其次，所述终端接收第二无线资源信息，所述第二无线资源信息与所述第一网络切片相关联。然后，所述终端从所述AMF设备处接收第一指示信息。第二无线资源信息与第一指示信息可以在同一条消息中接收到，也可以在不同消息中接收到。所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；指示所述终端根据所述第二无线资源信息接入所述第一网络切片。
在一种可能的实现中，所述第一接入网设备不支持所述第一网络切片；所述终端根据所述第二无线资源信息选择第二接入网设备，所述第二接入网设备支持所述第一网络切片。
具体的，终端可以通过第一指示信息中指示的终端当前接入的所述第一接入网设备不支持所述第一网络切片，确定第一接入网设备不支持第一网络切片。进而，终端通过第一指示信息中的第二无线资源信息选择第二接入网设备。由于第二无线资源信息与所述第一网络切片相关联，所以选择出的第二接入网设备可以支持第一网络切片。
在另一种可能的实现中，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片，所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。
具体的，终端可以通过第一指示信息中指示的终端当前接入第一接入网设备选择的第一无线资源信息不支持所述第一网络切片或者第一无线资源信息错误，确定第一无线资源信息不支持第一网络切片。进而，终端仍然可以接入第一接入网设备，只是要通过第二无线资源信息接入，而不要通过第一无线资源信息接入。
在一种可能的实现中，所述终端发起无线连接释放流程，进入空闲态。具体的，终端可以根据第一指示信息中指示的终端释放无线连接或指示所述终端进入空闲态之后，发起注册流程，而主动发起无线连接释放流程，并进入空闲态。
在一种可能的实现中，所述终端可以从所述第一接入网设备接收来自所述AMF设备的第二无线资源信息。具体的，AMF设备可以直接将第二无线资源信息发送给终端，第一接入网设备只进行透传。第二无线资源信息可以是频段优先级列表信息。
在另一种可能的实现中，所述终端还可以接收来自所述第一接入网设备的第二无线资源信息。具体的，AMF设备可以先将用于确定第二无线资源信息的信息(例如RFSP索引值)发送给第一接入网设备，第一接入网设备在确定了第二无线资源信息后再发送给终端。
在一种可能的实现中，所述终端接收来自所述第一接入网设备的第二无线资源信息之前，所述终端还可以向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息。第一接入网设备可以主动将第二无线资源信息发送给终端，也可以是终端向第一接入网设备请求后，第一接入网设备再将第二无线资源信息发送给终端。
第四方面，提供了一种通信的方法，应用于第一接入网设备。首先，第一接入网设备接收来自终端的第一消息，并向AMF设备发送所述第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识。其次，所述第一接入网设备接收来自所述AMF设备的第二消息，所述第二消息包括第二无线资源信息和第一指示信息，所述第二无线资源信息与所述第一网络切片相关联。所述第二无线资源信息可以为RFSP索引值。所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述第一接入网设备不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的第一无线资源信息错误。
在一种可能的实现中，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一接入网设备不支持所述第一网络切片；或者，所述第二无线资源信息用于所述终端选择第一接入网设备，所述第一接入网设备支持所述第一网络切片，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片。由于第二无线资源信息与所述第一网络切片相关联，进而终端选择的第一接入网设备或第二接入网设备可以支持第一网络切片。
在一种可能的实现中，所述第一接入网设备释放无线连接。具体的，第一接入网设备可以根据第一指示信息中指示的第一接入网设备释放无线连接，来实现主动释放无线连接。
在一种可能的实现中，所述第一接入网设备向所述AMF设备发送所述终端接入所述第一接入网设备所选择的第一无线资源信息。以便AMF设备可以确定第一无线资源信息是否支持第一网络切片。
在一种可能的实现中，所述第一接入网设备接收到的所述第二无线资源信息为RFSP索引值，所述第一接入网设备向所述终端或者所述AMF设备发送所述RFSP索引值对应的频段优先级列表信息。AMF设备将RFSP索引值发送给第一接入网设备，第一接入网设备将频段优先级列表信息发送给终端，以便终端根据频段优先级列表信息接入第一网络切片。或者AMF设备将RFSP索引值发送给第一接入网设备，第一接入网设备将频段优先级列表信息发送给AMF设备，AMF设备再将频段优先级列表信息发送给终端，以便终端根据频段优先级列表信息接入第一网络切片。
在一种可能的实现中，所述第一接入网设备向所述终端发送所述RFSP索引值对应的频段优先级列表信息之前，所述第一接入网设备还可以接收所述终端发送的请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息，所述第二无线资源信息可以为频段优先级列表信息。第一接入网设备也可以主动将第二无线资源信息发送给终端，也可以是终端向第一接入网设备请求后，第一接入网设备再将第二无线资源信息发送给终端。
第五方面，提供了一种通信的装置，所述装置具有实现上述第一方面及第一方面任一可能的实现中AMF设备的功能，或者实现上述第二方面及第二方面任一可能的实现中AMF设备的功能，或者实现上述第三方面及第三方面任一可能的实现中终端的功能，或者实现上述第四方面及第四方面任一可能的实现中第一接入网设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的功能模块。
第六方面，提供了一种通信的装置，该装置可以为上述第一方面及第一方面任一可能的实现或者第二方面及第二方面任一可能的实现中的AMF设备，或者为设置在AMF设备中的芯片。该装置包括收发器以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器分别与存储器和收发器耦合，当处理器执行所述计算机程序或指令时，使装置通过所述收发器执行上述第一方面及第一方面任一可能的实现中由AMF设备执行的方法，或者执行上述第二方面及第二方面任一可能的实现中由AMF设备执行的方法。
第七方面，提供了一种通信的装置，该装置可以为上述方法第三方面及第三方面任一可能的实现中的终端，或者为设置在终端中的芯片。该装置包括收发器以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器分别与存储器和收发器耦合，当处理器执行所述计算机程序或指令时，使装置通过所述收发器执行上述第三方面及第三方面任一可能的实现中由终端执行的方法。
第八方面，提供了一种通信的装置，该装置可以为上述方法第四方面及第四方面任一可能的实现中的第一接入网设备，或者为设置在第一接入网设备中的芯片。该装置包括收发器以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器分别与存储器和收发器耦合，当处理器执行所述计算机程序或指令时，使装置通过所述收发器执行上述第四方面及第四方面任一可能的实现中由第一接入网设备执行的方法。
第九方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述第一方面及第一方面任一可能的实现中由AMF设备执行的方法，或者执行上述第二方面及第二方面任一可能的实现中由AMF设备执行的方法，或者执行上述第三方面及第三方面任一可能的实现中由终端执行的方法，或者执行上述第四方面及第四方面任一可能的实现中由第一接入网设备执行的方法。
第十方面，本申请提供了一种芯片系统，该芯片系统包括处理器和存储器，所述处理器、所述存储器之间电耦合；所述存储器，用于存储计算机程序指令；所述处理器，用于执行所述存储器中的部分或者全部计算机程序指令，当所述部分或者全部计算机程序指令被执行时，用于实现上述第一方面及第一方面任一可能的实现的方法中AMF设备的功能，或者实现上述第二方面及第二方面任一可能的实现的方法中AMF设备的功能，或者实现上述第三方面及第三方面任一可能的实现的方法中终端的功能，或者实现上述第四方面及第四方面任一可能的实现的方法中第一接入网设备的功能。
在一种可能的设计中，所述芯片系统还可以包括收发器，所述收发器，用于发送所述处理器处理后的信号，或者接收输入给所述处理器的信号。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十一方面，提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，上述第一方面及第一方面任一可能的实现中由AMF设备执行的方法被执行，或者上述第二方面及第二方面任一可能的实现中由AMF设备执行的方法被执行，或者上述第三方面及第三方面任一可能的实现中由终端执行的方法被执行，或者上述第四方面及第四方面任一可能的实现中由第一接入网设备执行的方法被执行。
第十二方面，提供了一种通信的系统，所述系统包括：执行上述第一方面及第一方面 任一可能的实现中的方法的AMF设备，以及执行上述第四方面及第四方面任一可能的实现中的方法的第一接入网设备。
在一种可能的设计中，所述通信系统还包括：执行上述第三方面及第三方面任一可能的实现中的方法的终端。
第十三方面，提供了一种通信的系统，所述系统包括：执行上述第二方面及第二方面任一可能的实现中的方法的AMF设备，以及执行上述第四方面及第四方面任一可能的实现中的方法的第一接入网设备。
在一种可能的设计中，所述通信系统还包括：执行上述第三方面及第三方面任一可能的实现中的方法的终端。
上述第五方面至十三方面可以达到的技术效果可以参照上述第一方面至第四方面中任意一种可能的设计可以达到的技术效果，这里不再重复赘述。
附图说明
图1a、图1b和图1c为本申请实施例中分别提供的一种通信系统架构示意图；
图2、图3、图4、图5为本申请实施例中分别提供的一种通信过程示意图；
图6、图7为本申请实施例中提供的一种通信的装置。
具体实施方式
下面将结合附图，对本申请实施例进行详细描述。
为便于理解本申请实施例，以下先对本申请实施例的部分用语进行解释说明，以便于本领域技术人员理解。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统，全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统，第五代(5th Generation，5G)系统，新一代无线(new radio，NR)接入技术，及未来的通信系统等。
本申请以5G通信系统进行举例说明。
例如，图1a为本申请可以适用的一种5G的通信系统架构示意图。具体的，图1a为基于服务化架构的5G网络架构示意图。
例如，图1b为本申请可以适用的另一种5G的通信系统架构示意图。具体的，图1b为基于点对点的5G架构示意图。图1a与图1b的主要区别在于，图1a中的各个网元之间的接口是服务化的接口，图1b的各个网元之间的接口是点对点的接口。
图1a和图1b所示的5G网络架构中可包括终端设备部分、接入网部分，核心网部分。可选的，还包括数据网络(data network，DN)和应用功能(application function，AF)网元部分。终端通过接入网接入核心网，核心网与DN或AF进行通信。下面对其中的部分网元的功能进行简单介绍说明。
终端设备(terminal device)，也可以称为用户设备(user equipment，UE)，是一种具有无线收发功能的设备，可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、气球和卫星上等)。所述终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual  reality，VR)终端、增强现实(augmented reality，AR)终端、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)中的无线终端等。
本申请中的(R)AN设备，是一种为终端设备提供无线通信功能的设备，(R)AN设备也称为接入网设备。本申请中的RAN设备包括但不限于：5G中的下一代基站(g nodeB，gNB)、演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心等。
数据网络DN，可部署多种业务，可为终端设备提供数据和/或语音等服务。例如，DN是某智能工厂的私有网络，智能工厂安装在车间的传感器可为终端设备，DN中部署了传感器和控制服务器，控制服务器可为传感器提供服务。传感器可与控制服务器通信，获取控制服务器的指令，根据指令将采集的传感器数据传送给控制服务器等。又例如，DN是某公司的内部办公网络，该公司员工的手机或者电脑可为终端设备，员工的手机或者电脑可以访问公司内部办公网络上的信息、数据资源等。
应用网元，主要支持与第三代合作伙伴计划(3rd generation partnership project，3GPP)核心网交互来提供服务，例如影响数据路由决策，策略控制功能或者向网络侧提供第三方的一些服务。在5G通信系统中，该应用网元可以是应用功能(application function，AF)网元。在未来通信系统中，应用网元仍可以是AF网元，或者，还可以有其它的名称，本申请不做限定。
核心网部分可包括以下网元中的一个或多个：
接入管理网元，是由运营商网络提供的控制面网元，负责终端设备接入运营商网络的接入控制和移动性管理，例如包括移动状态管理，分配用户临时身份标识，认证和用户等功能。在5G通信系统中，该接入管理网元可以是接入与移动性管理功能(access and mobility management function，AMF)网元。在未来通信系统中，接入管理网元仍可以是AMF网元，或者，还可以有其它的名称，本申请不做限定。
会话管理网元，主要负责移动网络中的会话管理，如会话建立、修改、释放。具体功能如为用户分配IP地址、选择提供报文转发功能的用户面网元等。在5G通信系统中，该会话管理网元可以是会话管理功能(session management function，SMF)网元。在未来通信系统中，会话管理网元仍可以是SMF网元，或者，还可以有其它的名称，本申请不做限定。
用户面网元，负责终端设备中用户数据的转发和接收。可以从数据网络接收用户数据，通过接入网设备传输给终端设备；用户面网元还可以通过接入网设备从终端设备接收用户数据，转发到数据网络。用户面网元中为终端设备提供服务的传输资源和调度功能由SMF网元管理控制的。在5G通信系统中，该用户面网元可以是用户面功能(user plane function，UPF)网元。在未来通信系统中，用户面网元仍可以是UPF网元，或者，还可以有其它的名称，本申请不做限定。
数据管理网元，用于生成认证信任状，用户标识处理(如存储和管理用户永久身份等)， 接入控制和签约数据管理等。在5G通信系统中，该数据管理网元可以是统一数据管理(unified data management，UDM)网元。在未来通信系统中，统一数据管理仍可以是UDM网元，或者，还可以有其它的名称，本申请不做限定。
策略控制网元，主要支持提供统一的策略框架来控制网络行为，提供策略规则给控制层网络功能，同时负责获取与策略决策相关的用户签约信息。在4G通信系统中，该策略控制网元可以是策略和计费规则功能(policy and charging rules function，PCRF)网元。在5G通信系统中，该策略控制网元可以是策略控制功能(policy control function，PCF)网元。在未来通信系统中，策略控制网元仍可以是PCF网元，或者，还可以有其它的名称，本申请不做限定。
网络存储网元，可用于提供网元发现功能，基于其他网元的请求，提供网元类型对应的网元信息。NRF还提供网元管理服务，如网元注册、更新、去注册以及网元状态订阅和推送等。在5G通信系统中，该网络存储网元可以是网络注册功能(network repository function，NRF)网元。在未来通信系统中，网络存储网元仍可以是NRF网元，或者，还可以有其它的名称，本申请不做限定。
网络开放功能网元，可用于提供用于安全地向外部开放由3GPP网络功能设备提供的业务和能力等。在5G通信系统中，网络开放功能网元可以是网络开放功能(network exposure function，NEF)网元。在未来通信系统中，网络开放功能网元仍可以是NEF网元，或者，还可以有其它的名称，本申请不做限定。
网络切片选择网元，可用于为终端的业务选择合适的网络切片。在5G通信系统中，网络切片选择网元可以是网络切片选择功能(network slice selection function，NSSF)网元。在未来通信系统中，网络开放功能网元仍可以是NSSF网元，或者，还可以有其它的名称，本申请不做限定。
网络数据分析网元，可以从各个网络功能(network function，NF)，例如策略控制网元、会话管理网元、用户面网元、接入管理网元、应用功能网元(通过网络能力开放功能网元)收集数据，并进行分析和预测。在5G通信系统中，网络数据分析网元可以是网络数据分析功能(network data analytics function，NWDAF)。在未来通信系统中，网络开放功能网元仍可以是NWDAF网元，或者，还可以有其它的名称，本申请不做限定。
统一数据存储网元，负责存储结构化的数据信息，其中包括签约信息，策略信息，以及有标准格式定义的网络数据或业务数据。在5G通信系统中，统一数据存储网元可以是统一数据存储(unified data repository，UDR)。在未来通信系统中，网络开放功能网元仍可以是UDR网元，或者，还可以有其它的名称，本申请不做限定。
可以理解的是，上述网元或者功能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。一种可能的实现方式，上述网元或者功能可以由一个设备实现，也可以由多个设备共同实现，还可以是一个设备内的一个功能模块，本申请实施例对此不作具体限定。
NSSF、NRF、NWDAF、UDM、UDR、AMF等5GC网络功能往往分别处理多个网络切片的业务，SMF和UPF一般是处理特定网络切片的业务，PCF可以是处理多个网络切片的业务，也可能只处理特定的网络切片的业务。接入网设备通常处理多个网络切片的业务。
应理解，上述应用于本申请实施例的网络架构仅是举例说明的网络架构，适用本申请 实施例的网络架构并不局限于此，任何能够实现上述各个设备的功能的网络架构都适用于本申请实施例。
为便于理解本申请实施例，接下来对本申请的应用场景进行介绍，本申请实施例描述的业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域技术人员可知，随着新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
物理网络可以被抽象划分成多个网络切片(network slice)，每个网络切片构成一个端到端的逻辑网络，不同网络切片之间在逻辑上是隔离的。每个网络切片可以按照需求，灵活地提供一种或多种网络服务，并且和其它网络切片互不影响。目前定义的标准的网络切片类型有eMBB、URLLC和MIoT。
两个不同的网络切片的服务区域可以完全不同，可以部分重叠，也可以完全相同。一个网络切片的服务区域可以包括一个或多个跟踪区(tracking area，TA)。可使用跟踪区标识(tracking area identifier，TAI)来标识这个跟踪区，其中TAI包括移动国家编号(mobile country code，MCC)、移动网络编号(mobile network code，MNC)和跟踪区编号(tracking area code，TAC)。或者，也可以采用TAC来标识这个跟踪区。一个跟踪区内可以部署一个或多个AMF设备来服务所述跟踪区，还可以部署一个或多个接入网设备来服务所述跟踪区。在一个跟踪区内，可以支持一个或多个网络切片。当跟踪区部署了某个网络切片a时，服务所述跟踪区的AMF设备中通常存在至少一个AMF设备支持该网络切片a。当某个AMF设备支持网络切片a时，所述AMF设备连接的接入网设备中通常存在至少一个接入网设备支持该网络切片a。
一个AMF设备可以服务一个跟踪区，也可以服务多个跟踪区。一个接入网设备服务一个跟踪区域。一个跟踪区可包含一个或多个小区，一个接入网设备可以服务一个或多个小区。一个AMF设备在不同的跟踪区内支持的网络切片可以相同，也可以不同。例如，跟踪区1和跟踪区2均支持网络切片a和b，一个AMF设备既服务跟踪区1，也服务跟踪区2。
通常情况下，不同的网络切片的性能要求不同。如AR业务或VR业务的网络切片要求大带宽、低时延；物联网(internet of things，IOT)业务的网络切片要求支持海量终端接入，但带宽小且对时延无要求。无线网络在各个频段的特性也有较大差异。比如，中低频段覆盖范围大，功耗小，能够支持的网络接入速率低；高频段覆盖范围小，功耗大，能够支持的网络接入速率高，且低时延。
考虑到各种网络切片的性能需求不同，不同网络切片所对应的需要接入的无线资源(例如频率(frequency)或频段(operating bands))可能有所不同，例如，如表1所示。
Figure PCTCN2021077701-appb-000001
表1
其中，表1中的n1，n77和n38表示频段对应的编号，根据3GPP TS 38.101协议的定 义，对频段对应的编号的描述如表2所示：
Figure PCTCN2021077701-appb-000002
表2
此外，不同的网络切片所对应的需要接入的接入网设备可能也有所不同。如图1c所示，在一个跟踪区域TA内，部署接入网设备RAN1(RAN1的覆盖区域范围为图中实线部分)、RAN2、RAN 3和RAN 4(RAN2、RAN 3和RAN 4的覆盖区域范围为图中虚线部分)。例如，接入网设备RAN1使用中低频段提供MIoT网络切片的接入，使用高频段提供eMBB网络切片的接入。
终端不感知当前接入的接入网设备支持哪些网络切片，终端通过盲选的方式尝试接入一个或多个网络切片。假设终端用户在运营商签约了网络切片URLLC和eMBB，如果该终端处于RAN 1的覆盖区域的中心位置，处于RAN2、RAN 3和RAN 4的小区边缘，终端检测到RAN1的信号质量较好，则通过RAN1接入到网络。如果终端请求接入网络切片URLLC，RAN1不支持网络切片URLLC，此时，会导致终端无法正常接入到请求接入的网络切片URLLC上。如果终端请求接入网络切片eMBB，如果终端在中低频段接入RAN1，由于RAN1只在高频段支持网络切片eMBB，所以终端仍然无法正常接入到请求接入的网络切片eMBB上。
接下来将结合附图对本申请提供的多种通信的技术方案进行详细介绍，以实现终端正常接入到网络切片上。附图中以虚线标识的特征或内容可理解为本申请实施例的可选操作或者可选结构。
本申请中的“和/或”，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。字符“/”一般表示前后关联对象是一种“或”的关系。
本申请中所涉及的多个，是指两个或两个以上。
在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
另外，在本申请实施例中，“示例的”一词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或实现方案不应被解释为比其它实施例或实现方案更优选或更具优势。确切而言，使用示例的一词旨在以具体方式呈现概念。
如图2所示，提出了本申请实施例的一种通信的过程示意图，具体包括以下步骤：
步骤201：终端通过第一接入网设备向AMF设备发送非接入层(non-access stratum，NAS)请求消息，相应的，所述AMF设备接收来自第一接入网设备的NAS请求消息。所述NAS请求消息包括终端请求接入的第一网络切片的标识。所述第一网络切片可以是一个，也可以是多个。
例如，NAS请求消息中携带Requested NSSAI，Requested NSSAI用于指示该终端请求接入的第一网络切片的标识，例如Requested NSSAI＝S-NSSAI-2，即第一网络切片的标识为S-NSSAI-2。
可选的，第一接入网设备还可以向AMF设备发送终端当前所在的跟踪区的标识和/或终端所在的小区标识。例如，所述小区标识可以是全球小区标识(cell global identifier，CGI)。
在一种示例中，所述NAS消息可以是注册请求消息(registration request)。所述NAS请求消息只有终端和核心网(core network，CN)设备需要处理，接入网设备不需要处理，只进行转发即可。为了便于区分，将终端发送给AMF设备的NAS消息称为NAS请求消息。将AMF设备发送给终端的NAS消息称为NAS响应消息。
第一接入网设备为终端当前接入的接入网设备(current RAN)。终端接入第一接入网设备所选择的无线资源信息称为第一无线资源信息，此处的无线资源信息可以是频点、频率、频段或频谱，本申请不做限定，第一频段信息例如是高频、或者中频、或低频、或具体数值的频点值，如4.9GHz。
可选的，第一接入网设备还可以向AMF设备发送终端接入第一接入网设备所选择的第一无线资源信息。
步骤202：所述AMF设备可以确定所述第一接入网设备是否支持所述第一网络切片。进一步地，在所述第一接入网设备支持所述第一网络切片时，AMF设备还可以确定终端当前接入所述第一接入网设备所选择的第一无线资源信息是否支持所述第一网络切片。
AMF设备获取该AMF设备所服务的区域中部署的接入网设备支持的网络切片。还可以获取接入网设备在哪些无线资源信息上支持哪些网络切片。AMF设备可以根据这些信息，判断出第一接入网设备是否支持所述第一网络切片，以及第一接入网设备在哪些无线资源信息上支持第一网络切片。其中，AMF设备获取上述信息的方法可以是AMF设备本地配置，或者AMF设备从其他网络设备获取，例如AMF设备从接入网设备或者网络切片选择功能网元NSSF处获取，本申请不做限定。
其中，在本申请的实施例中，AMF设备确定第一接入网设备是否支持第一网络切片，可以包括但是不限于以下几种情况：
1)第一接入网设备所在的TA是否支持第一网络切片。
2)第一接入网设备自身是否支持第一网络切片。
3)第一接入网设备服务的小区(cell)中是否包括支持第一网络切片的小区。
4)第一接入网设备所在的切片服务区域(slicing area，SA)是否支持第一网络切片。其中，接入网设备所在的SA内包含一个或者多个接入网设备。其中，SA的覆盖范围可以比TA的覆盖范围大，或者SA的覆盖范围可以比TA的覆盖范围小，本申请不做限定。
为了描述方便，以第一接入网设备所在的TA是否支持第一网络切片为例说明。
在一个示例中，AMF设备可以保存如表3所示的信息，AMF设备获取该AMF设备所服务的区域部署的接入网设备(RAN)的标识，以及接入网设备所服务的跟踪区(TA)的标识，以及接入网设备所在的跟踪区支持的网络切片的标识。
Figure PCTCN2021077701-appb-000003
表3
在表3的示例中，AMF设备的服务区域包括TAI-1和TAI-2。RAN1位于TAI-1中，TAI-1支持的网络切片为S-NSSAI-1。RAN2和RAN3位于TAI-2中，TAI-2支持的网络切片为S-NSSAI-2。当Requested NSSAI＝S-NSSAI-2，即第一网络切片的标识为S-NSSAI-2时，如果第一接入网设备为RAN1即current RAN＝RAN1，AMF设备可以确定第一接入网设备所在的TAI支持S-NSSAI-1，并不支持S-NSSAI-2，即第一接入网设备支持S-NSSAI-1，不支持S-NSSAI-2。
在另一示例中，AMF设备可以保存如表4所示的信息，AMF设备获取网络切片与接入该网络切片所需的无线资源信息之间的对应关系。其中，AMF设备可以支持表4中的网络切片或者不支持表4中的网络切片，本申请不做限定。网络切片与接入该网络切片所需的无线资源信息之间的对应关系可以是一对一(即只能通过一个无线资源接入该网络切片)，也可以是一对多(即可以通过多个无线资源接入该网络切片)，本申请不做限定。
Figure PCTCN2021077701-appb-000004
表4
在表4的示例中，接入S-NSSAI-1所标识的网络切片(网络切片1)所需的无线资源信息为无线资源信息1，如频点资源为2.6GHz，或者频段资源为n1。接入S-NSSAI-2所标识的网络切片(网络切片2)所需的无线资源信息为无线资源信息2，如频点资源为2.6GHz和4.9GHz，或者频段资源为n77和n38，即该网络切片2可以通过2.6GHz接入或者4.9GHz接入，或者通过频段资源为n77或者n38接入。接入S-NSSAI-3所标识的网络切片(网络切片3)所需的无线资源信息为无线资源信息3，无线资源信息3包含频点资源为4.9GHz，或者频段资源为n38。可选的，在执行完步骤202之后，在执行步骤203之前或步骤204之前，或者步骤206之前，当第一接入网设备不支持第一网络切片时，AMF设备还可以确定是否存在第二接入网设备支持所述第一网络切片，如果存在，则执行步骤203或步骤204或步骤206。
其中，AMF设备判断第二接入网设备是否支持所述第一网络切片的方法与上述AMF设备判断第一接入网设备是否支持所述第一网络切片的方法相同，此处概不赘述。
为了描述方便，以第二接入网设备所在的TA是否支持第一网络切片为例说明。
第二接入网设备可以部署在第一跟踪区，也可以部署在第二跟踪区，第二跟踪区与第一跟踪区的覆盖区域存在部分重叠，或者第一跟踪区与第二跟踪区位置相近。也可以理解 为AMF设备判断该终端所在位置附近存在一个第二接入网设备(第二接入网设备也可以称之为target RAN)可以支持第一网络切片(Requested NSSAI)。例如，根据前面的示例，Requested NSSAI＝S-NSSAI-2，current RAN＝RAN1，AMF设备获知终端当前位于第一跟踪区TAI-1，第二跟踪区TAI-2距离第一跟踪区TAI-1位置较近，RAN2和RAN3位于TAI-2，TAI-2支持S-NSSAI-2。则AMF判断终端可以通过RAN2或者RAN3来请求接入Requested NSSAI。第二接入网设备即RAN2或者RAN3。
当第一接入网设备支持第一网络切片时，如果步骤201中，AMF设备从第一接入网设接收了第一无线资源信息，可选的，AMF设备还可以确定第一无线资源信息是否支持第一网络切片。也可以理解，AMF设备还可以确定终端接入所述第一接入网设备所选择的所述第一无线资源信息是否正确。示例性的，例如Requested NSSAI＝S-NSSAI-2，即第一网络切片的标识为S-NSSAI-2。根据表3所示，如果第一接入网设备为RAN2，即current RAN＝RAN2，AMF设备可以确定第一接入网设备所在的TAI-2支持S-NSSAI-2，即第一接入网设备支持S-NSSAI-2。同时，终端接入所述第一接入网设备所选择的所述第一无线资源信息为无线资源信息1，但是在表4的示例中，接入S-NSSAI-2所标识的网络切片所需的无线资源信息为无线资源信息2，与无线资源信息1不同，则AMF设备确定终端接入所述第一接入网设备所选择的所述第一无线资源信息是错误的。
需要注意的是，在本申请中，当第一接入网设备不支持第一网络切片时，可选的，AMF设备也可以根据上述描述确定第一无线资源信息是否支持第一网络切片，本申请不做限定。即可以理解为，无论第一接入网设备是否支持第一网络切片时，可选的，AMF设备都可以确定第一无线资源信息是否支持第一网络切片。
在一种可能的实现方式中，如上所述，第一接入网设备可以在步骤201中将第一无线资源信息与NAS请求消息一同发送给AMF设备。
可选的，在另一种可能的实现方式中，在步骤201之后，在步骤202之前，还可以包括步骤202a，AMF设备从第一接入网设备处获取终端接入第一接入网设备的第一无线资源信息。
具体地，如果步骤201中，AMF设备没有从第一接入网设接收到第一无线资源信息，则AMF设备可以执行步骤202a，以便后续在步骤202中：AMF设备确定终端接入第一接入网设备的第一无线资源信息是否支持终端请求接入的第一网络切片。
需要注意的是，在本申请中，无论第一接入网设备是否支持第一网络切片时，AMF设备都可以执行步骤202a。
可选的，步骤203：所述AMF设备向NRF设备请求获取策略控制功能PCF设备的标识信息。
示例的，AMF设备调用NRF设备的服务化操作Nnrf_NFDiscovery_Request，向NRF设备请求发现PCF设备。
所述AMF设备中也可以预先保存有PCF设备的标识信息，则可以无需执行步骤203。
可选的，步骤204：所述AMF设备向PCF设备发送第三消息，相应的，PCF设备接收来自AMF设备的第三消息。所述第三消息包括以下至少一项：所述第一网络切片的标识(Requested NSSAI)、终端的标识，签约的RFSP索引值index。如果第一网络切片为多个，则第三消息中包括多个第一网络切片的标识，也就是将Requested NSSAI包括的网络切片的标识均发送给PCF设备。
签约的RFSP索引值index也可以称之为签约的subscribed RFSP Index。示例的，subscribed RFSP Index可以是AMF设备从UDM设备处获取的，也可以是AMF设备本地配置的。终端的标识可以是用户永久标识符(subscription permanent identifier，SUPI)。
示例的，AMF设备向PCF设备请求获取策略信息，调用PCF的服务化操作Npcf_AMPolicyControl_Creat，以实现向PCF设备发送所述第三消息。也可以理解为所述第三消息为Npcf_AMPolicyControl_Creat。
可选的，步骤205：所述PCF设备向所述AMF设备发送第四消息，相应的，AMF设备接收来自PCF设备的所述第四消息。所述第四消息包括授权的RFSP索引值(authorized RFSP Index)。可选的，所述第四消息包括第一网络切片的标识(Requested NSSAI)。
该授权的RFSP索引值是基于第一网络切片(Requested NSSAI)生成的，具体的，该授权的RFSP索引值是基于Requested NSSAI和subscribed RFSP Index共同生成的。为了便于区分，将根据Requested NSSAI的生成的该授权的RFSP索引值定义为第一RFSP索引值。
需要注意的是，步骤204和步骤205描述的是AMF设备通过PCF设备获取第一RFSP索引值的方法，AMF设备还可以通过其他方法获取第一RFSP索引值，比如AMF设备根据基于Requested NSSAI和subscribed RFSP Index自行确定第一RFSP索引值，或者AMF设备通过其他设备获取第一RFSP索引值，本申请不做限定。
步骤206：AMF设备向第一接入网设备(current RAN)发送N2消息(N2 message)，相应的，第一接入网设备接收来自所述AMF设备的N2消息。所述N2消息中包括以下至少一项：第一Allowed NSSAI、第一RFSP索引值(基于Requested NSSAI生成的authorized RFSP Index)，NAS响应消息。
AMF设备将允许终端接入的网络切片的标识告知第一接入网设备。为了方便描述，将告知第一接入网设备的允许终端接入的网络切片称为第一Allowed NSSAI，将告知终端的允许终端接入的网络切片称为第二Allowed NSSAI，通常第二Allowed NSSAI被放在NAS响应消息中以通知终端。其中，第一Allowed NSSAI包含的S-NSSAI和第二Allowed NSSAI包含的S-NSSAI可以相同，或者不同，本申请不做限定。
所述第一Allowed NSSAI、第一RFSP索引值，NAS响应消息可以在一个N2消息中发送给第一接入网设备，也可以分别在两个或三个N2消息中发送给第一接入网设备。上述已经介绍过为了便于区分，将终端发送给AMF设备的NAS消息称为NAS请求消息。将AMF设备发送给终端的NAS消息称为NAS响应消息。在一种示例中，NAS响应消息可以是注册响应消息，注册响应消息可以是注册接受消息(registration accept)，也可以是注册拒绝消息(registration reject)。
AMF确定第一Allowed NSSAI包含的S-NSSAI的方法可以包括以下几种：
1)在一种示例中，如果第一接入网设备支持终端请求接入的某一第一网络切片且第一无线资源信息支持第一网络切片(即第一无线资源信息选择正确)；或者，如果第一接入网设备支持终端请求接入的第一网络切片且第一无线资源信息不支持第一网络切片(即第一无线资源信息选择错误)，则AMF告知第一接入网设备的允许所述终端接入的网络切片的标识即为第一网络切片的标识，即第一Allowed NSSAI包含的S-NSSAI是Requested NSSAI里面current RAN支持的S-NSSAI。
例如，Requested NSSAI＝S-NSSAI-1+S-NSSAI-2，current RAN＝RAN1，且RAN1位于 TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN只支持Requested NSSAI里面的S-NSSAI-1，但是不支持Requested NSSAI里面的S-NSSAI-2，则第一Allowed NSSAI＝S-NSSAI-1。可以理解为，这种情况下，无论第一无线资源信息是否支持终端请求接入的第一网络切片，第一Allowed NSSAI＝S-NSSAI-1。
2)在一种示例中，如果第一接入网设备不支持任一第一网络切片(即Requested NSSAI里面所有的S-NSSAI，current RAN都不支持)，这时，无论第一无线资源信息是否支持第一网络切片，AMF告知第一接入网设备的允许所述终端接入的第一Allowed NSSAI包含的S-NSSAI的标识为终端的签约的网络切片中的缺省网络切片default S-NSSAI的标识。
例如，根据前面的示例，Requested NSSAI＝S-NSSAI-2，current RAN＝RAN1，且RAN1位于TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN不支持Requested NSSAI，则第一Allowed NSSAI＝default S-NSSAI。可以理解为，这种情况下，如果第一接入网设备不支持任一第一网络切片，第一Allowed NSSAI＝default S-NSSAI。
示例的，所述NAS响应消息中可以包括第二Allowed NSSAI，NAS响应消息中包括的第二Allowed NSSAI包含的S-NSSAI与Requested NSSAI包含的S-NSSAI相同，即告知终端的允许终端接入的网络切片的标识为终端请求的第一网络切片的标识，也即发送至终端的第二Allowed NSSAI＝Requested NSSAI。例如，Requested NSSAI＝S-NSSAI-2，则第二Allowed NSSAI＝S-NSSAI-2。又例如Requested NSSAI＝S-NSSAI-1+S-NSSAI-2，第二Allowed NSSAI＝S-NSSAI-1+S-NSSAI-2。也就是说，对于上述四种情况，即如果第一接入网设备支持终端请求接入的某一第一网络切片且第一无线资源信息支持第一网络切片(即第一无线资源信息选择正确)；或者，如果第一接入网设备支持终端请求接入的某一第一网络切片且第一无线资源信息不支持第一网络切片(即第一无线资源信息选择错误)；或者，如果第一接入网设备不支持任一第一网络切片(即Requested NSSAI里面所有的S-NSSAI，current RAN都不支持)且第一无线资源信息支持第一网络切片(即第一无线资源信息选择正确)，或者，如果第一接入网设备不支持任一第一网络切片(即Requested NSSAI里面所有的S-NSSAI，current RAN都不支持)且第一无线资源信息不支持第一网络切片(即第一无线资源信息选择错误)，告知终端的允许终端接入的网络切片的标识为终端请求的第一网络切片的标识，也即发送至终端的第二Allowed NSSAI＝Requested NSSAI。
上述介绍了第一接入网设备不支持任一第一网络切片时，发送给第一接入网设备的允许终端接入的网络切片为缺省网络切片，而发送给终端的允许终端接入的网络切片为第一网络切片，即AMF设备发送至第一接入网设备的第一Allowed NSSAI与发送至终端的第二Allowed NSSAI包含的网络切片的标识不同。既可以保证第一接入网设备支持第一Allowed NSSAI，同时允许终端接入第一网络切片(即第二Allowed NSSAI包含的S-NSSAI与Requested NSSAI包含的S-NSSAI相同)。
在一种示例中，N2消息中包括第一指示信息(indication)，所述第一指示信息可以指示以下至少一项：
指示所述终端释放无线连接；
指示所述终端进入空闲态(idle)之后，发起注册流程。
可选地，所述第一指示信息还可以指示以下任一项：
指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；该指示内容 通常适用于第一接入网设备不支持第一网络切片的情况；
指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况；
指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况。
需要说明的是，第一指示信息可以仅指示如上三项中的任一项：指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；该指示内容通常适用于第一接入网设备不支持第一网络切片的情况；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。除此之外，第一指示信息还可以指示其他的内容，本申请在此并不限制。终端收到该第一指示信息后，将释放无线连接，并在进入空闲态(idle)之后，发起注册流程。由此，可以理解为第一指示信息具有指示所述终端释放无线连接或指示终端进入空闲态之后，发起注册流程的作用。
可选的，所述第一指示信息还可以指示所述终端根据第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。此处的第二无线资源信息可以是后续描述的第一频段优先级列表。
上述第一指示信息用于指示终端，在这种情况下，在一种示例中，上述第一指示信息可以位于NAS响应消息中，第一接入网设备不对NAS响应消息进行处理，直接发送给终端；在另一种示例中，第一指示信息也可以不位于NAS响应消息中，第一接入网设备也可以将该第一指示信息发送给终端。
步骤207：第一接入网设备向终端发送NAS响应消息(例如注册响应消息)，相应的，终端接收第一接入网设备发送的NAS响应消息。可选的，在该步骤中，第一接入网设备还可以向终端发送第一频段优先级列表信息，具体地：
第一频段优先级列表信息和NAS响应消息可以在一条消息中发送给终端，也可以在两条消息中分别发送给终端。示例的，第一接入网设备向终端发送无线资源控制(radio resource control，RRC)消息，RRC消息中携带第一频段优先级列表信息和NAS响应消息。
如果步骤206的第一指示信息不位于NAS响应消息中，第一接入网设备还可以再次向终端发送步骤206中的第一指示信息。
在一种示例中，第一接入网设备本地可以配置RAT/频率优先级的用户配置文件标识(subscriber profile ID for RAT/frequency selection priority，SPID)与频段优先级列表信息的对应关系，或RFSP index与频段优先级列表信息的对应关系。第一接入网设备根据N2消息中携带的第一RFSP index即可确定对应的第一频段优先级列表信息。本申请中频段优先级列表信息也可以称之为频段信息，或频段列表，或频段优先级信息，或者频段优先级列表、频率信息，或频率列表，或频率优先级信息，或者频率优先级列表、频点信息，或频点列表，或频点优先级信息，或者频点优先级列表等。
第一接入网设备可以主动将第一频段优先级列表信息发送给终端，也可以是终端请求获取第一频段优先级列表信息后再发送给终端。可选的，第一接入网设备先将NAS响应消息发送给终端，然后终端向所述第一接入网设备发送请求消息，所述请求消息携带所述 第一网络切片的标识(即第二Allowed NSSAI＝Requested NSSAI)；所述请求消息用于获取所述第二无线资源信息(第一频段优先级列表信息)。第一接入网设备在接收到该请求消息后，将第一频段优先级列表发送给终端。
需要注意的是，本申请中，无线侧所指的SPID和核心网侧的RFSP index为同一概念，本申请中为了统一，在核心网侧和无线侧均称之为RFSP index。
如下表5所示，为终端接入标识为S-NSSAI-2的网络切片所需的频段优先级列表信息。
Figure PCTCN2021077701-appb-000005
表5
在表5的示例中，网络切片的标识为S-NSSAI-2，支持S-NSSAI-2的频段包括频段2和频段3(频段也可以称为无线资源信息)，频段2优先级较高，频段3优先级较低。支持频段2的接入网设备为RAN2，支持频段3的接入网设备为RAN3。可以理解为，终端优先通过频段2接入到RAN2，如果终端接入RAN2失败，则终端通过频段3接入到RAN3。
步骤208：终端根据第一指示信息，发起无线连接释放(AN release)流程，该流程之后，终端释放与第一接入网设备的RRC连接，并进入空闲态idle。
如果步骤207中，第一接入网设备没有将第一频段优先级列表信息发给终端，那么在步骤208中，第一接入网设备将第一频段优先级列表信息发给终端。具体地，终端向第一接入网设备发送RRC消息，第一接入网设备通过RRC消息向UE发送第一频段优先级列表信息。
步骤209：终端根据获取的第一频段优先级列表信息进行目标接入网设备的选择，并发起注册流程(这是第二次发起注册流程)。也就是终端再次发送注册请求消息，注册请求消息中携带的Requested NSSAI包含的S-NSSAI为步骤201中的第一网络切片。
其中，终端根据获取的第一频段优先级列表信息进行目标接入网设备的选择的方法可以按照现有技术中的小区重选机制来实现，本申请不再赘述。
对于终端来说，在进行目标接入网设备的选择时，终端根据第一频段优先级列表信息选择出的目标接入网设备支持第一网络切片的接入网设备，同时，终端接入到该目标接入网设备所使用的无线资源信息也是该第一网络切片支持的。即可以理解为，当第一接入网设备不支持第一网络切片，或者，当接入第一接入网设备的第一无线资源信息不支持第一网络切片，无论哪种情况，终端根据第一频段优先级列表信息进行选择之后，最终可以通过第一网络切片对应的无线资源信息接入目标接入网设备。
在一种示例中，第一接入网设备不支持步骤201中第一网络切片，目标接入网设备(target RAN)可以是不同于第一接入的网设备的第二接入网设备，由于目标接入网设备是根据第一频段优先级列表信息选择的，且该第一频段优先级列表信息是基于步骤201第一网络切片确定的。因此，第二接入网设备支持步骤201中第一网络切片，且接入到第二接入网设备的频段也支持步骤201中第一网络切片。例如，终端请求接入的第一网络切片的标识为S-NSSAI-2，第一接入网设备current RAN＝RAN1。由上述表5可以得出：支持第一网切片的接入网设备中不包括RAN1。终端可以根据频段优先级列表信息，选择支持第一网络切片的接入网设备来接入。由于频段2的优先级较高，终端也可以选择支持频段 2的接入网设备进行接入，例如可以采用频段2接入到RAN2上。
在另一种示例中，第一接入网设备支持步骤201中第一网络切片，终端接入所述第一接入网设备所选择的第一无线资源信息(例如频段)不支持步骤201中第一网络切片，则目标接入网设备可以是第一接入网设备，终端采用第二无线资源信息接入到第一接入网设备上。第二无线资源信息支持步骤201中第一网络切片。例如，终端请求接入的第一网络切片的标识为S-NSSAI-2，第一接入网设备current RAN＝RAN2。第一接入网设备支持第一网络切片。如果第一接入网设备RAN2支持频段1和频段2的接入，终端当前采用频段2(第一无线资源信息)接入第一接入网设备RAN2。由上述表5可以得出：第一接入网设备支持第一网络切片，频段1不支持第一网络切片。终端可以根据频段优先级列表信息确定仍然接入第一接入网设备，并且采用优先级较高的频段2接入第一接入网设备RAN2。
至此，终端可以根据第一频段优先级列表(可以理解为第一指示信息中的第二无线资源信息)接入到目标接入网设备上，并通过目标接入网设备成功注册到网络中，接入到第二次发起注册流程的Requested NSSAI对应的网络切片上，即接入到第一网络切片上。
现有技术中终端盲选接入网设备而导致终端无法接入到请求的第一网络切片上。本实施例中，AMF设备基于第一网络切片确定第一RFSP index，终端基于第一RFSP index获取满足第一网络切片的第一频段优先列表信息，并基于该第一频段优先级列表信息接入目标接入网设备。可以保证终端通过目标接入网设备接入到某个第一网络切片上，也可以提高终端接入网络切片的成功率和效率。
在另一个实施例中，步骤206中AMF设备向第一接入网设备发送的N2消息中包括的NAS响应消息为注册拒绝消息(registration reject)，所述注册拒绝消息中包括的第一指示信息又可以称之为：失败原因值(cause value)。失败原因值可以是以下任一项：
所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；该指示内容通常适用于第一接入网设备不支持第一网络切片的情况；
所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况；
所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况。
相应的，步骤207中第一接入网设备向终端发送的NAS响应消息为注册拒绝消息。
终端获知注册失败，并根据注册拒绝消息中包括的失败原因值获知本次注册失败的原因，进而执行步骤208和步骤209。
现有技术中终端盲选接入网设备而导致终端无法接入到请求的第一网络切片上，本实施例中，核心网拒绝终端的注册请求，并告知终端本次注册失败的原因值，触发终端重新选择目标接入网设备并进行再次入网。
可选的，在该示例中，步骤206的N2消息中可以无需包括告知给第一接入网设备的第一Allowed NSSAI。
如图3所示，提供了另一种通信的流程示意图。图3的示例相对于图2的示例区别在 于：图2的示例中步骤206中的第一指示信息是用于指示终端的，第一指示信息需要发送给终端，第一指示信息通常位于NAS响应消息中，终端主动释放无线连接；图3的示例中的步骤306中第一指示信息是用于指示第一接入网设备的，第一指示信息需要发送给第一接入网设备，第一指示信息不会位于NAS响应消息中，第一接入网设备主动释放无线连接。图3的示例与图2的示例的其余部分技术细节相同，重复之处不再赘述。
步骤301-步骤305，与步骤201-步骤205相同。
步骤306：AMF设备向第一接入网设备(current RAN)发送N2消息，相应的，第一接入网设备接收AMF设备发送的N2消息。所述N2消息中包括以下至少一项：第一Allowed NSSAI、第一RFSP索引值，NAS响应消息，第一指示信息(indication)。
所述第一指示信息可以指示所述第一接入网设备释放无线连接；具体可以是，第一接入网设备在向终端发送NAS响应消息(例如注册响应消息)后，释放无线连接，或者第一接入网设备在向终端发送第二无线资源信息后，释放无线连接。第二无线资源信息可以为第一RFSP索引值对应的第一频段优先级列表信息；
进一步地，可选的，所述第一指示信息还可以指示以下任一项：
指示所述第一接入网设备不支持所述第一网络切片；该指示内容通常适用于第一接入网设备不支持第一网络切片的情况；
指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况；
指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。该指示内容通常适用于终端接入第一接入网设备所选择的第一无线资源信息不支持第一网络切片的情况。
需要说明的是，第一指示信息可以仅指示如上三项中的任一项：指示所述第一接入网设备不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。除此之外，第一指示信息还可以指示其他的内容，本申请在此并不限制。第一接入网设备收到该第一指示信息后，释放无线连接。由此，可以理解为第一指示信息具有指示所述第一接入网设备释放无线连接的作用。
步骤307：第一接入网设备向终端发送NAS响应消息(例如注册响应消息)，相应的，终端接收第一接入网设备发送的NAS响应消息。由于步骤306中的NAS响应消息不包括第一指示信息，则步骤307中的NAS响应消息也不包括第一指示信息。
可选的，在该步骤307中，第一接入网设备还可以向终端发送第一频段优先级列表信息，具体地，第一接入网设备可以主动将第一频段优先级列表信息发送给终端，也可以是终端请求获取第一频段优先级列表信息后再发送给终端。可选的，第一接入网设备先将NAS响应消息发送给终端，然后终端向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识(即第二Allowed NSSAI＝Requested NSSAI)；所述请求消息用于获取所述第二无线资源信息(第一频段优先级列表信息)。第一接入网设备在接收到该请求消息后，将第一频段优先级列表发送给终端。
步骤308：第一接入网设备根据第一指示信息可以发起无线连接释放(AN release)流程。该流程之后，终端释放与当前接入网设备的RRC链接，并进入空闲态idle。
如果步骤307中，第一接入网设备没有将第一频段优先级列表信息发给终端，那么在步骤308中，第一接入网设备将第一频段优先级列表信息发给终端。具体地，第一接入网设备通过RRC消息向UE发送第一频段优先级列表信息。
步骤309与步骤209相同。
在上述实施例中，不管第一接入网设备支持或不支持第一网络切片，以及第一无线资源信息支持或不支持第一网络切片，均采用第二Allowed NSSAI来告知终端，即第二Allowed NSSAI＝Requested NSSAI。进而终端通过与第一网络切片关联的第一频段优先级列表信息接入某个第一网络切片的技术方案。
接下来介绍网络侧可以给终端下发拒绝终端接入的网络切片Rejected NSSAI关联的第三频段优先级列表信息，以及允许终端接入的第二Allowed NSSAI关联的第二频段优先级列表信息，终端可以根据自身的需求，来选择是接入Rejected NSSAI包括的网络切片还是第二Allowed NSSAI包括的网络切片。
如图4所示，提出了本申请实施例另一种通信的过程示意图，具体包以下步骤：
步骤401-步骤403，与步骤201-步骤203相同。
可选的，步骤404：所述AMF设备向策略控制功能PCF设备发送第三消息，相应的，PCF设备接收来自AMF设备的第三消息。所述第三消息包括以下至少一项：告知终端的拒绝终端接入的网络切片Rejected NSSAI，告知终端的允许终端接入的第二Allowed NSSAI、终端的标识，签约的RFSP索引值。此处Rejected NSSAI在名称上表示AMF设备拒绝终端接入的网络切片，实际上仅是为了说明第一接入网设备不支持该网络切片，不能因此限定终端不能接入该网络切片，Rejected NSSAI这个名称也可以换做其他名称，不进行限定。
AMF确定第二Allowed NSSAI包含的S-NSSAI的方法可以包括以下几种：
1)在一种示例中，如果第一接入网设备支持终端请求接入的某个第一网络切片，此时不管第一无线资源信息支持或不支持该第一网络切片，AMF告知终端的允许终端接入的网络切片的标识即为该第一网络切片的标识，即第二Allowed NSSAI包含的S-NSSAI是Requested NSSAI里面current RAN支持的S-NSSAI。
例如，Requested NSSAI＝S-NSSAI-1+S-NSSAI-2，current RAN＝RAN1，且RAN1位于TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN只支持Requested NSSAI里面的S-NSSAI-1，但是不支持Requested NSSAI里面的S-NSSAI-2，则第二Allowed NSSAI＝S-NSSAI-1。
2)在一种示例中，如果第一接入网设备不支持终端请求接入的任一第一网络切片，此时不管第一无线资源信息支持或不支持第一网络切片，AMF告知终端的允许终端接入的网络切片的标识为终端签约的网络切片中的缺省网络切片的标识，即第二Allowed NSSAI＝default S-NSSAI。
例如，Requested NSSAI＝S-NSSAI-2，current RAN＝RAN1，且RAN1位于TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN不支持Requested NSSAI里面的S-NSSAI-2，则第二Allowed NSSAI＝default S-NSSAI。
AMF确定Rejected NSSAI包含的S-NSSAI的方法可以包括以下几种：
在一种示例中，如果第一接入网设备不支持终端请求接入的一个或多个第一网络切片， 此时不管第一无线资源信息支持或不支持该第一网络切片，AMF告知终端的拒绝所述终端接入的网络切片的标识即为该第一网络切片的标识，即Rejected包含的S-NSSAI是Requested NSSAI里面current RAN不支持的S-NSSAI。
例如，Requested NSSAI＝S-NSSAI-1+S-NSSAI-2，current RAN＝RAN1，且RAN1位于TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN只支持Requested NSSAI里面的S-NSSAI-1，但是不支持Requested NSSAI里面的S-NSSAI-2，则Rejected NSSAI＝S-NSSAI-2。
例如，Requested NSSAI＝S-NSSAI-2，current RAN＝RAN1，且RAN1位于TAI-1，该TAI-1支持S-NSSAI-1，不支持S-NSSAI-2。因此current RAN不支持Requested NSSAI里面的S-NSSAI-2，则Rejected NSSAI＝S-NSSAI-2。
综上，在第一接入网设备不支持某个第一网络切片Requested NSSAI时，该不被支持的第一网络切片的标识也可以通过Rejected NSSAI来指示告知终端。也就是第三消息中包括Rejected NSSAI包含的S-NSSAI属于Requested NSSAI。在第一接入网设备不支持任一第一网络切片时，告知终端的允许终端接入的第二Allowed NSSAI包括的网络切片的标识为终端签约的网络切片中的缺省网络切片的标识，即第二Allowed NSSAI＝default S-NSSAI。在第一接入网设备支持某一第一网络切片时Requested NSSAI时，该被支持的第一网络切片的标识也可以通过第二Allowed NSSAI来指示告知终端。也就是第三消息中包括第二Allowed NSSAI包含的S-NSSAI属于Requested NSSAI。
在另一种示例中，上述的步骤404也可以替换为：AMF设备可以向PCF设备发送两条第三消息，分别包括Rejected NSSAI包括的网络切片的标识(即第一接入网设备不支持的第一网络切片的标识)和第二Allowed NSSAI包括的网络切片的标识(例如第一接入网设备支持的第一网络切片的标识或缺省网络切片的标识)。
可选的，步骤405：所述PCF设备向所述AMF设备发送第四消息，相应的，AMF设备接收来自PCF设备的所述第四消息。所述第四消息包括第三RFSP索引值、第二RFSP索引值。
第三RFSP索引值是基于Rejected NSSAI生成的，具体的，该第三RFSP索引值是基于Rejected NSSAI和subscribed RFSP Index共同生成的。第三RFSP索引值也可以称为第一授权的RFSP索引值或授权的RFSP索引值。第二RFSP索引值是基于第二Allowed NSSAI生成的，具体的，该第二RFSP索引值是基于第二Allowed NSSAI和subscribed RFSP Index共同生成的。第二RFSP索引值也可以称为第二授权的RFSP索引值或授权的RFSP索引值。在图2和图3的示例中，第一RFSP索引值是根据Requested NSSAI生成的，虽然在告知终端时，第二Allowed NSSAI＝Requested NSSAI。但实际上，图2和图3的示例中第二Allowed NSSAI与图4的示例中第二Allowed NSSAI包含的内容可能是不同的，故确定出的RFSP索引值也通过第一RFSP索引值和第二RFSP索引值做出了区分。
在另一种示例中，上述的步骤505也可以替换为：所述PCF设备向所述AMF设备发送两条第四消息，分别包括第三RFSP索引值和第二RFSP索引值。
需要注意的是，步骤404和步骤405描述的是AMF设备通过PCF设备获取第三RFSP索引值、第二授权的RFSP索引值的方法，AMF设备还可以通过其他方法获取第三RFSP 索引值、第二授权的RFSP索引值。比如AMF设备根据基于Rejected NSSAI和subscribed RFSP Index自行确定第三RFSP索引值，或者AMF设备通过其他设备获取第三RFSP索引值，本申请不做限定。比如AMF设备根据基于第二Allowed NSSAI和subscribed RFSP Index自行确定第二RFSP索引值，或者AMF设备通过其他设备获取第二RFSP索引值，本申请不做限定。
步骤406：AMF设备向第一接入网设备(current RAN)发送N2消息(N2 message)，相应的，第一接入网设备接收来自所述AMF设备的N2消息。所述N2消息中包括第二RFSP索引值、第三RFSP索引值、NAS响应消息。
NAS响应消息包括Rejected NSSAI包括的网络切片的标识、第二Allowed NSSAI包括的网络切片的标识，以及第三指示信息中一个或多个。第三指示信息用于指示终端接入网络切片的方式。
上述描述的N2消息中信息可以是在一条消息中发送给第一接入网设备的，也可以是在多条消息中发送给第一接入网设备的。
另外，可选的，AMF设备还可以指示第三RFSP索引值与Rejected NSSAI的对应关系，以及指示第二RFSP索引值与第二Allowed NSSAI的对应关系，以便第一接入网设备知道哪个RFSP索引值是根据哪个网络切片确定的。
第三指示信息包括但不限于指示以下至少一项：
指示所述终端，如果所述终端接入Rejected NSSAI包括的网络切片(第一接入网设备不支持的第一网络切片)，终端向第一接入网设备请求第一网络切片对应的第二无线资源信息(例如，第三RFSP索引值对应的第三频段优先级列表信息)；可选的，还可以指示：终端在请求第二无线资源信息后，释放无线连接；
指示终端向第一接入网设备请求Rejected NSSAI包括的网络切片(第一接入网设备不支持的第一网络切片)对应的第二无线资源信息(例如，第三RFSP索引值对应的第三频段优先级列表信息)。
可选的，步骤406的NAS响应消息中也可以包括图2的步骤206中的第一指示信息。
接下来第一接入网设备可以向终端发送以下信息：第二频段优先级列表信息、第三频段优先级列表信息，Rejected NSSAI包括的网络切片的标识、第二Allowed NSSAI包括的网络切片的标识。第三频段优先级列表信息用于终端接入Rejected NSSAI包括的网络切片，第二频段优先级列表信息用于终端接入第二Allowed NSSAI包括的网络切片。
可选的，第一接入网设备还可以向终端发送第三指示信息。
在一种示例中，如图4的步骤407：第一接入网设备向终端发送第二频段优先级列表信息和NAS响应消息(例如注册响应消息)。相应的，终端接收第一接入网设备发送的第二频段优先级列表信息和/或NAS响应消息。
第二频段优先级列表信息和NAS响应消息可以在一条消息中发送给终端，也可以在两条消息中分别发送给终端。示例的，第一接入网设备向终端发送RRC消息，RRC消息中携带第二频段优先级列表信息和/或NAS响应消息。
可选的，步骤407a：终端可以根据第三指示信息，确定向第一接入网设备获取第二无线资源信息。具体的，终端还可以向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识(Rejected NSSAI)；所述请求消息用于获取所述第二无线资源信息。第二无线资源信息例如为第三RFSP索引值对应的第三频段优先级列表信息。
终端可以根据自身的实际需求，确定是否向第一接入网设备获取第二无线资源信息。如果需要，终端可以通过RRC消息向第一接入网设备(current RAN)发送第一网络切片(Rejected NSSAI)，current RAN将第三频段优先级列表信息返回给终端。
或者终端在不执行步骤407a时，第一接入网设备也可以将第三频段优先级列表信息发送给终端，例如，可以是与第二频段优先级列表信息和NAS响应消息可以在一条消息中发送给终端，也可以在不同消息中分别发送给终端。
步骤408与步骤208相同：终端发起无线连接释放(AN release)流程，该流程之后，终端释放与第一接入网设备的RRC连接，并进入空闲态idle。
步骤409：终端根据第三频段优先级列表信息或第二频段优先级列表信息，选择目标接入网设备，接入Rejected NSSAI包括的第一网络切片或第二Allowed NSSAI包括的网络切片。
在一种示例中，终端根据获取的第三频段优先级列表信息进行目标接入网设备的选择，并发起注册流程(这是第二次发起注册流程)。也就是终端再次发送注册请求消息，注册请求消息中携带的Requested NSSAI包含的S-NSSAI为上述的Rejected NSSAI包括的网络切片。至此，终端可以根据第三频段优先级列表接入到目标接入网设备上，并通过目标接入网设备成功注册到网络中，接入到Requested NSSAI对应的网络切片上，即接入到Rejected NSSAI包括的第一网络切片上。
在另一种示例中，终端根据获取的第二频段优先级列表信息进行目标接入网设备的选择，并发起注册流程(这是第二次发起注册流程)。也就是终端再次发送注册请求消息，注册请求消息中携带的Requested NSSAI包含的S-NSSAI为上述的第二Allowed NSSAI包括的网络切片。至此，终端可以根据第二频段优先级列表接入到目标接入网设备上，并通过目标接入网设备成功注册到网络中，接入到第二次发起注册流程的Requested NSSAI对应的网络切片上，即接入到第二Allowed NSSAI包括的网络切片上。
终端盲选接入网设备而导致终端无法接入到请求的第一网络切片上，本实施例中，AMF设备基于Rejected NSSAI确定第三RFSP index以及基于第二Allowed NSSAI确定第二RFSP index。终端基于第三RFSP index获取满足不被支持的第一网络切片的第三频段优先列表信息和/或基于第二RFSP index获取满足第二Allowed NSSAI包括的网络切片的第二频段优先列表信息，并基于该第三频段优先级列表信息或第二频段优先级列表信息接入目标接入网设备。可以保证终端通过目标接入网设备接入到Rejected NSSAI或第二Allowed NSSAI包括的网络切片上，也可以提高终端接入网络切片的成功率和效率。
如图5所示，提供了一种通信的方法，包括以下步骤：图5的示例与图4的示例的区别在于，AMF设备发送给终端的NAS响应消息中包括Rejected NSSAI对应的第三频段优先级列表信息，终端无需向AMF设备获取第三频段优先级列表信息，第三指示信息的内容也会稍有变化，在图5的示例中，指示信息称为第四指示信息。
步骤501-步骤505，与步骤401-步骤405相同，重复之处不再赘述。
步骤506：AMF设备向第一接入网设备(current RAN)发送N2消息，相应的，第一接入网设备接收来自所述AMF设备的N2消息。所述N2消息中包括以下至少一项：第二RFSP索引值(基于第二Allowed NSSAI生成的authorized RFSP Index)，NAS响应消息。
NAS响应消息中包括以下至少一项：Rejected NSSAI包括的网络切片的标识、第二Allowed NSSAI包括的网络切片的标识，基于第三RFSP索引值(基于Rejected NSSAI生 成的authorized RFSP Index)确定的第三频段优先级列表信息，第四指示信息。
第四指示信息包括但不限于指示以下至少一项：
指示所述终端，如果所述终端接入Rejected NSSAI包括的网络切片(第一接入网设备不支持的第一网络切片)，终端则根据NAS响应消息中的第三频段优先级列表信息选择目标接入网设备；
指示所述终端，NAS响应消息中包括的第三频段优先级列表信息支持Rejected NSSAI包括的网络切片(第一接入网设备不支持的第一网络切片)；
指示终端根据NAS响应消息中的第三频段优先级列表信息选择目标接入网设备。
可选的，步骤506的NAS响应消息中也可以包括图2的步骤206中的第一指示信息。
可选的，AMF设备可以配置有RFSP索引值对应的频段优先级列表信息。AMF设备可以根据自身的配置，确定第三RFSP索引值对应的第三频段优先级列表信息。
在一种示例中，AMF设备可以自身保存RFSP索引值与频段优先级列表信息的对应关系，AMF设备根据自身的配置，确定RFSP索引值对应的第三频段优先级列表信息。
可选的，在另一种示例中，在步骤506之前，还包括步骤506a：AMF设备从第一接入网设备处获取第三RFSP索引值对应的第三频段优先级列表信息。具体可以包括以下步骤：
AMF设备向第一接入网设备发送频率请求(frequency request)，相应的，第一接入网设备接收AMF设备发送的频率请求(frequency request)，该频率请求中包括第三RFSP索引值。
第一接入网设备根据本地配置的RFSP索引值与频段优先级列表信息的对应关系，确定第三RFSP索引值对应的第三频段优先级列表信息。
第一接入网设备向AMF设备发送频率响应(frequency response)，相应的，AMF设备接收来自第一接入网设备发送的频率响应(frequency response)，该频率相应中包括第三RFSP索引值对应的第三频段优先级列表信息。
此处的频率请求(frequency request)，频率响应(frequency response)仅是一个消息的称呼，也可以换做其他名称，例如频段信息获取请求，频段信息获取响应。
步骤507：第一接入网设备向终端发送第二频段优先级列表信息和/或NAS响应消息(例如注册响应消息)。相应的，终端接收第一接入网设备发送的第二频段优先级列表信息和/或NAS响应消息。
步骤508与步骤408相同，步骤509与步骤409相同。
综上，终端盲选接入网设备而导致终端无法接入到请求的第一网络切片上，本实施例中，AMF设备基于Rejected NSSAI确定第三RFSP index以及基于第二Allowed NSSAI确定第二RFSP index。终端基于第三RFSP index获取满足不被支持的第一网络切片的第三频段优先列表信息和/或基于第二RFSP index获取满足第二Allowed NSSAI网络切片的第二频段优先列表信息，并基于该第三频段优先级列表信息或第二频段优先级列表信息接入目标接入网设备。可以保证终端通过目标接入网设备接入到Rejected NSSAI或第二Allowed NSSAI网络切片上，也可以提高终端接入网络切片的成功率和效率。
在本申请的另一示例中，AMF设备向第一接入网设备的发送的N2消息中包括：NAS响应消息(例如注册响应消息)，NAS响应消息中包括：Rejected NSSAI包括的网络切片 的标识，第二Allowed NSSAI包括的网络切片的标识，第三RFSP索引值对应的第三频段优先级列表信息，第二RFSP索引值对应的第二频段优先级列表信息。在这种情况下，第一接入网设备在向终端发送NAS响应消息的基础上，可以无需再向终端发送第二RFSP索引值对应的第二频段优先级列表信息。AMF设备本地可以配置第二RFSP索引值对应的第二频段优先级列表信息，也可以是AMF设备向第一接入网设备请求第二RFSP索引值对应的第二频段优先级列表信息，具体过程与步骤506a原理相同，重复之处不再赘述。
在本申请的另一示例中，AMF设备向第一接入网设备的发送的N2消息中包括：第三RFSP索引值，NAS响应消息(例如注册响应消息)。NAS响应消息中包括：Rejected NSSAI包括的网络切片的标识，第二Allowed NSSAI包括的网络切片的标识，第二RFSP索引值对应的第二频段优先级列表信息。可选的，还可以包括步骤406中的指三指示信息。在这种情况下，AMF设备本地可以配置第二RFSP索引值对应的第二频段优先级列表信息，也可以是AMF设备向第一接入网设备请求第二RFSP索引值对应的第二频段优先级列表信息，具体过程与步骤506a原理相同，重复之处不再赘述。第一接入网设备在向终端发送NAS响应消息的基础上，可以主动向终端发送RFSP索引值对应的第二频段优先级列表信息，也可以等到终端的请求后，再向终端发送第三频段优先级列表信息。
接下来再介绍一种通信的方法，应用于AMF设备。
首先，AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；该过程可以参见上述的步骤201、步骤301、步骤401、步骤501。第一消息也可以NAS请求消息，具体可以是注册请求消息，其余重复之处不赘述。
其次，所述AMF设备确定所述第一接入网设备不支持所述第一网络切片；该过程可以参见上述的步骤202、步骤302、步骤402、步骤502，重复之处不赘述。
然后，所述AMF设备向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。AMF设备向第一通信设备发送第二消息过程可以参见上述的步骤206、步骤306、步骤406、步骤506。
当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息可以为RFSP索引值。RFSP索引值具体可以是上述图2、图3的示例中的第一RFSP索引值，具体参见步骤206、步骤306中的第一RFSP索引值。第一接入网设备可以确定第一RFSP索引值对应的第一频段优先级列表信息，并将第一频段优先级列表信息发送给终端。第一接入网设备将第一频段优先级列表信息发送给终端的过程可以参见上述的步骤207、步骤307。RFSP索引值也可以是上述图4和图5中的第二RFSP索引值、第三RFSP索引值，具体参见步骤406中的第二RFSP索引值和第三RFSP索引值，以及步骤506中的第二RFSP索引值。第一接入网设备可以确定第二RFSP索引值对应的第二频段优先级列表信息和/或第三RFSP索引值对应的第三频段优先级列表信息，并将第二优先级列表信息和/或第三频段优先级列表信息发送给终端。第一接入网设备将第二频段优先级列表信息和/或第三频段优先级列表信息发送给终端的过程可以参见上述的步骤407a、步骤507。此时第二消息可以是N2消息。
当所述第一通信设备为所述终端时，所述第二无线资源信息可以为频段优先级列表信息。频段优先级列表信息具体可以是上述如图5的示例中的第三频段优先级列表信息。具体参见506中的第三频段优先级列表信息。第二消息可以是N2消息，也可以是NAS响应消息，NAS响应消息具体可以是注册响应消息，例如注册接受消息或者注册拒绝消息。
在一种示例中，所述第一网络切片为所述AMF设备允许所述终端接入的网络切片，或者为所述AMF设备拒绝所述终端接入的网络切片。例如在步骤206和步骤306的注册响应消息中的第二Allowed NSSAI＝Requested NSSAI，即第一网络切片为所述AMF设备允许所述终端接入的网络切片。在步骤406和步骤506中，Rejected NSSAI为Requested NSSAI中的第一接入网设备不支持的第一网络切片，第二Allowed NSSAI可能为Requested NSSAI的第一接入网设备支持的第一网络切片。需要注意的是，此处Rejected NSSAI在名称上表示AMF设备拒绝终端接入Rejected NSSAI包含的网络切片，实际上仅是为了说明第一接入网设备不支持Rejected NSSAI包含的网络切片，不能因此限定终端不能接入Rejected NSSAI包含的网络切片。
在一种示例中，所述第二消息还包括：第一指示信息；
当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。可参见上述步骤206中的描述。
当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述第一接入网设备不支持所述第一网络切片。可参见上述步骤306中的描述。
在一种示例中，所述AMF设备向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；所述AMF设备接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。该过程可以参见上述步骤204、步骤205、步骤304和步骤305处描述的第一RFSP索引值，重复之处不再赘述。该过程也可以参见上述步骤404、步骤405、步骤504和步骤505处描述的第二RFSP索引值和第三RFSP索引值，重复之处不再赘述。
接下来再介绍一种通信的方法，应用于AMF设备。
首先，AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；该过程可以参见上述的步骤201、步骤301、步骤401、步骤501。第一消息也可以NAS请求消息，具体可以是注册请求消息，其余重复之处不赘述。
其次，所述AMF设备确定所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；该过程可以参见上述的步骤202、步骤302、步骤402、步骤502，重复之处不赘述。
然后，所述AMF设备向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一 接入网设备或所述终端。AMF设备向第一通信设备发送第二消息过程可以参见上述的步骤206、步骤306、步骤406、步骤506。
当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息可以为RFSP索引值。RFSP索引值具体可以是上述图2、图3的示例中的第一RFSP索引值，具体参见步骤206、步骤306中的第一RFSP索引值。第一接入网设备可以确定第一RFSP索引值对应的第一频段优先级列表信息，并将第一频段优先级列表信息发送给终端。第一接入网设备将第一频段优先级列表信息发送给终端的过程可以参见上述的步骤207、步骤307。RFSP索引值也可以是上述图4和图5中的第二RFSP索引值、第三RFSP索引值，具体参见步骤406中的第二RFSP索引值和第三RFSP索引值，以及步骤506中的第二RFSP索引值。第一接入网设备可以确定第二RFSP索引值对应的第二频段优先级列表信息和/或第三RFSP索引值对应的第三频段优先级列表信息，并将第二优先级列表信息和/或第三频段优先级列表信息发送给终端。第一接入网设备将第二频段优先级列表信息和/或第三频段优先级列表信息发送给终端的过程可以参见上述的步骤407a、步骤507。此时第二消息可以是N2消息。
当所述第一通信设备为所述终端时，所述第二无线资源信息可以为频段优先级列表信息，频段优先级列表信息具体可以是上述图5的示例中的第三频段优先级列表信息。具体参见506中的第三频段优先级列表信息。第二消息可以是N2消息，也可以是NAS响应消息，NAS响应消息具体可以是注册响应消息，例如注册接受消息或者注册拒绝消息。
在一种示例中，所述AMF设备接收来自所述第一接入网设备的所述第一无线资源信息。该过程可以参见上述的步骤202a，步骤302a，步骤402a，步骤502a，重复之处不再赘述。
在一种示例中，所述第一网络切片为所述AMF设备允许所述终端接入的网络切片，或者为所述AMF设备拒绝所述终端接入的网络切片。例如在步骤206和步骤306的注册响应消息中的第二Allowed NSSAI＝Requested NSSAI，即第一网络切片为所述AMF设备允许所述终端接入的网络切片。在步骤406和步骤506中，Rejected NSSAI为Requested NSSAI中的第一接入网设备不支持的第一网络切片，第二Allowed NSSAI可能为Requested NSSAI的第一接入网设备支持的第一网络切片。需要注意的是，此处Rejected NSSAI在名称上表示AMF设备拒绝终端接入Rejected NSSAI包含的网络切片，实际上仅是为了说明第一接入网设备不支持Rejected NSSAI包含的网络切片，不能因此限定终端不能接入Rejected NSSAI包含的网络切片。
在一种示例中，所述第二消息还包括：第一指示信息；
当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。可参见上述步骤206中的描述。
当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入 网设备所选择的所述第一无线资源信息错误。可参见上述步骤306中的描述。
在一种示例中，所述AMF设备向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；所述AMF设备接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。该过程可以参见上述步骤204、步骤205、步骤304和步骤305处描述的第一RFSP索引值，重复之处不再赘述。该过程也可以参见上述步骤404、步骤405、步骤504和步骤505处描述的第二RFSP索引值和第三RFSP索引值，重复之处不再赘述。
接下来再介绍一种通信的方法，应用于终端。
首先，终端通过第一接入网设备向AMF设备发送第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；该过程可以参见上述的步骤201、步骤301、步骤401、步骤501。第一消息也可以NAS请求消息，具体可以是注册请求消息，其余重复之处不赘述。
其次，所述终端接收第二无线资源信息，所述第二无线资源信息与所述第一网络切片相关联；第二无线资源信息可以是步骤207、步骤307中的第一频段优先级列表。步骤407、步骤407a、步骤507中的第二频段优先级列表和第三频段优先级列表。
然后，所述终端从所述AMF设备接收第一指示信息，具体可以参见上述的步骤206和步骤207中的NAS响应消息中的第一指示信息。第二无线资源信息与第一指示信息可以在同一条消息中接收到，也可以在不同消息中接收到。
所述第一指示信息用于指示以下至少一项：指示所述终端释放无线连接；指示所述终端进入空闲态之后，发起注册流程；指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；指示所述终端根据所述第二无线资源信息接入所述第一网络切片。
在一种示例中，所述第一接入网设备不支持所述第一网络切片；所述终端根据所述第二无线资源信息选择第二接入网设备，所述第二接入网设备支持所述第一网络切片。具体过程可以参见步骤209、步骤309、步骤409和步骤509的描述，重复之处不再赘述。
在一种示例中，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片，所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。具体过程可以参见步骤209、步骤309、步骤409和步骤509的描述，重复之处不再赘述。
在一种示例中，所述终端发起无线连接释放流程，进入空闲态。具体过程可以参见步骤208、(步骤308中是第一接入网设备发起无线连接释放流程)、步骤408、步骤508的描述，重复之处不再赘述。进入空闲态之后，并发起注册流程，以及根据所述第二无线资源接入所述第一网络切片。具体过程可以参见步骤209、步骤309、步骤409和步骤509的描述，重复之处不再赘述。
在一种示例中，所述终端从所述第一接入网设备接收来自所述AMF设备的第二无线资源信息。第二无线资源信息具体可以参见步骤506和步骤507中AMF设备通过第一接入网设备从NAS响应消息中携带第三频段优先级列表信息。
在一种示例中，所述终端接收来自所述第一接入网设备的第二无线资源信息。第二无 线资源信息具体可以参见步骤207和步骤307中第一接入网设备向终端发送第一频段优先级列表信息；第二无线资源信息还可以参见步骤407a中第一接入网设备向终端发送第三频段优先级列表信息，第二无线资源信息也可以参见步骤507中第一接入网设备向终端发送第二频段优先级列表信息，重复之处不再赘述。
在一种示例中，所述终端接收来自所述第一接入网设备的第二无线资源信息之前，所述终端向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息。具体可以参见上述步骤407a处的描述，重复之处不再赘述。
接下来再介绍一种通信的方法，应用于第一接入网设备。
首先，第一接入网设备接收来自终端的第一消息，并向接入与移动性管理功能AMF设备发送所述第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；该过程可以参见上述的步骤201、步骤301、步骤401、步骤501。第一消息也可以NAS请求消息，具体可以是注册请求消息，其余重复之处不赘述。
其次，所述第一接入网设备接收来自所述AMF设备的第二消息，所述第二消息包括第二无线资源信息和第一指示信息，所述第二无线资源信息与所述第一网络切片相关联。所述第二无线资源信息可以为RFSP索引值。RFSP索引值具体可以是上述图2和图3的示例中的第一RFSP索引值，具体参见步骤206、步骤306中的第一RFSP索引值。第一接入网设备可以确定第一RFSP索引值对应的第一频段优先级列表信息，并将第一频段优先级列表信息发送给终端。第一接入网设备将第一频段优先级列表信息发送给终端的过程可以参见上述的步骤207、步骤307。RFSP索引值也可以是上述图4和图5中的第二RFSP索引值、第三RFSP索引值，具体参见步骤406中的第二RFSP索引值和第三RFSP索引值，以及步骤506中的第二RFSP索引值。第一接入网设备可以确定第二RFSP索引值对应的第二频段优先级列表信息和/或第三RFSP索引值对应的第三频段优先级列表信息，并将第二优先级列表信息和/或第三频段优先级列表信息发送给终端。第一接入网设备将第二频段优先级列表信息和/或第三频段优先级列表信息发送给终端的过程可以参见上述的步骤407a、步骤507。此时第二消息可以是N2消息。
所述第一指示信息用于指示以下至少一项：指示所述第一接入网设备释放无线连接；指示所述第一接入网设备不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。可参见上述步骤306中的描述。
在一种示例中，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一接入网设备不支持所述第一网络切片；或者，所述第二无线资源信息用于所述终端选择第一接入网设备，所述第一接入网设备支持所述第一网络切片，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片。
在一种示例中，所述第一接入网设备释放无线连接。具体可以参见步骤308的过程，第一接入网设备发起释放无线连接的流程。
在一种示例中，所述第一接入网设备向所述AMF设备发送所述终端接入所述第一接入网设备所选择的第一无线资源信息。具体过程可以参见上述的步骤202a、步骤302a、步 骤402a和步骤502a的过程。
在一种示例中，所述第一接入网设备接收到的所述第二无线资源信息为RFSP索引值，所述第一接入网设备向所述终端或者所述AMF设备发送所述RFSP索引值对应的频段优先级列表信息。此处的RFSP索引值为上述图2、图3的示例中的第一RFSP索引值，具体参见步骤206、步骤306中的第一RFSP索引值。第一接入网设备可以确定第一RFSP索引值对应的第一频段优先级列表信息，并将第一频段优先级列表信息发送给终端。第一接入网设备将第一频段优先级列表信息发送给终端的过程可以参见上述的步骤207、步骤307。RFSP索引值也可以是上述图4和图5中的第二RFSP索引值、第三RFSP索引值，具体参见步骤406中的第二RFSP索引值和第三RFSP索引值，以及步骤506中的第二RFSP索引值。第一接入网设备可以确定第二RFSP索引值对应的第二频段优先级列表信息和/或第三RFSP索引值对应的第三频段优先级列表信息，并将第二优先级列表信息和/或第三频段优先级列表信息发送给终端。第一接入网设备将第二频段优先级列表信息和/或第三频段优先级列表信息发送给终端的过程可以参见上述的步骤407a、步骤507。第一接入网设备向AMF设备发送RFSP索引值对应的频段优先级列表信息的过程可以参见上述步骤506a的过程，即第一接入网设备向AMF设备发送第三RFSP索引值对应的第三频段优先级列表信息。重复之处不再赘述。
在一种示例中，所述第一接入网设备向所述终端发送所述RFSP索引值对应的频段优先级列表信息之前，所述第一接入网设备接收所述终端发送的请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息，所述请求消息用于获取的所述第二无线资源信息为频段优先级列表信息。具体可以参见上述步骤407a处的描述，重复之处不再赘述。
前文介绍了本申请实施例的通信的方法，下文中将介绍本申请实施例中的通信的装置。方法、装置是基于同一技术构思的，由于方法、装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
基于与上述通信的方法的同一技术构思，如图6所示，提供了一种通信的装置600，装置600可以包括：收发模块620，处理模块610，可选的，还包括存储模块630；处理模块610可以分别与存储模块630和收发模块620相连，所述存储模块630也可以与收发模块620相连。
所述存储模块630可以包括一个或者多个存储器，存储器可以是一个或者多个设备、电路中用于存储程序或者数据的器件。存储模块630可以存储上述通信的方法的计算机执行指令，以使处理模块610执行上述实施例中的方法。存储模块630可以是寄存器、缓存或者RAM等，存储模块630可以和处理模块610集成在一起。存储模块630可以是ROM或者可存储静态信息和指令的其他类型的静态存储设备，存储模块630可以与处理模块610相独立。所述收发模块620可以是输入或者输出接口、管脚或者电路等。
在一个实施例中，装置600能够执行上述图2、图3、图4和图5的方法中由AMF设备执行的各个步骤。装置600可以为AMF设备，也可以为应用于AMF设备中的芯片。
在一种示例中，所述收发模块620，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；所述处理模块610，用于确 定所述第一接入网设备不支持所述第一网络切片；所述收发模块620，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。
在一种示例中，所述收发模块620，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；所述处理模块610，用于确定所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；所述收发模块620，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一接入网设备或所述终端。
在一种示例中，所述收发模块620，还用于接收来自所述第一接入网设备的所述第一无线资源信息。
在一种示例中，所述收发模块620，还用于向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。
在一种示例中，所述存储模块630，用于存储所述第二无线资源信息，所述第一指示信息等。
在一个实施例中，装置600能够执行上述图2、图3、图4和图5的方法中由终端执行的各个步骤。装置600可以为终端，也可以为应用于终端中的芯片。
在一种示例中，所述收发模块620，用于通过第一接入网设备向接入与移动性管理功能AMF设备发送第一消息，所述第一消息包括所述装置请求接入的第一网络切片的标识；以及接收第二无线资源信息，所述第二无线资源信息与所述第一网络切片相关联；从所述AMF设备接收第一指示信息，所述第一指示信息用于指示以下至少一项：
指示所述装置释放无线连接；
指示所述装置进入空闲态之后，发起注册流程；
指示所述装置当前接入的所述第一接入网设备不支持所述第一网络切片；
指示所述装置接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
指示所述装置接入所述第一接入网设备所选择的所述第一无线资源信息错误；
指示所述装置根据所述第二无线资源信息接入所述第一网络切片。
在一种示例中，所述第一接入网设备不支持所述第一网络切片；所述处理模块610，用于根据所述第二无线资源信息选择第二接入网设备，所述第二接入网设备支持所述第一网络切片。
在一种示例中，所述装置接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片，所述处理模块610，用于根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。
在一种示例中，所述处理模块610，用于发起无线连接释放流程，进入空闲态之后，并发起注册流程，以及根据所述第二无线资源接入所述第一网络切片。
在一种示例中，所述收发模块620在用于接收第二无线资源信息时，具体用于：从所述第一接入网设备接收来自所述AMF设备的第二无线资源信息；或者，接收来自所述第一接入网设备的第二无线资源信息。
在一种示例中，所述收发模块620，在用于接收来自所述第一接入网设备的第二无线资源信息之前，还用于向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息。
在一种示例中，所述存储模块630，用于存储所述第二无线资源信息，所述第一指示信息等。
在一个实施例中，装置600能够执行上述图2、图3、图4和图5的方法中由第一接入网设备执行的各个步骤。装置600可以为第一接入网设备，也可以为应用于第一接入网设备中的芯片。
在一种示例中，所述收发模块620，用于接收来自终端的第一消息，并向接入与移动性管理功能AMF设备发送所述第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；以及接收来自所述AMF设备的第二消息，所述第二消息包括第二无线资源信息和第一指示信息，所述第二无线资源信息与所述第一网络切片相关联；
所述第一指示信息用于指示以下至少一项：
指示所述装置释放无线连接；
指示所述装置不支持所述第一网络切片；
指示所述终端接入所述装置所选择的所述第一无线资源信息不支持所述第一网络切片；
指示所述终端接入所述装置所选择的所述第一无线资源信息错误。
在一种示例中，所述处理模块610，用于释放无线连接。
在一种示例中，所述收发模块620，还用于向所述AMF设备发送所述终端接入所述装置所选择的第一无线资源信息。
在一种示例中，所述装置接收到的所述第二无线资源信息为RFSP索引值；所述收发模块620，还用于向所述终端或者所述AMF设备发送所述RFSP索引值对应的频段优先级列表信息。
在一种示例中，所述收发模块620在用于向所述终端发送所述RFSP索引值对应的频段优先级列表信息之前，还用于接收所述终端发送的请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息，所述请求消息用于获取的所述第二无线资源信息为频段优先级列表信息。
在一种示例中，所述存储模块630，用于存储所述第二无线资源信息，所述第一指示信息等。
图7是本申请实施例的通信的装置700的示意性框图。装置700包括：处理器710和收发器720，可选的，还包括存储器730。该收发器，可以用于接收程序指令并传输至所述处理器，或者，该收发器可以用于该装置与其他通信设备进行通信交互，比如交互控制信令和/或业务数据等。该收发器可以为代码和/或数据读写收发器，或者，该收发器可以为通信处理器与收发机之间的信号传输收发器。所述处理器710和所述存储器730之间电 耦合。
示例的，存储器730，用于存储计算机程序；所述处理器710，可以用于调用所述存储器中存储的计算机程序或指令，执行上述的通信的方法，或者通过所述收发器720执行上述的通信的方法。
图6中的处理模块610可以通过处理器710来实现，收发模块620可以通过收发器720来实现，存储模块630可以通过存储器730来实现。
在一个实施例中，装置700能够执行上述图2、图3、图4和图5的方法中由AMF设备执行的各个步骤。装置700可以为AMF设备，也可以为应用于AMF设备中的芯片。
在一种示例中，所述收发器720，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；所述处理器710，用于确定所述第一接入网设备不支持所述第一网络切片；所述收发器720，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。
在一种示例中，所述收发器720，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；所述处理器710，用于确定所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；所述收发器720，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一接入网设备或所述终端。
在一种示例中，所述收发器720，还用于接收来自所述第一接入网设备的所述第一无线资源信息。
在一种示例中，所述收发器720，还用于向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。
在一种示例中，所述存储器730，用于存储所述第二无线资源信息，所述第一指示信息等。
在一个实施例中，装置700能够执行上述图2、图3、图4和图5的方法中由终端执行的各个步骤。装置700可以为终端，也可以为应用于终端中的芯片。
在一种示例中，所述收发器720，用于通过第一接入网设备向接入与移动性管理功能AMF设备发送第一消息，所述第一消息包括所述装置请求接入的第一网络切片的标识；以及接收第二无线资源信息，所述第二无线资源信息与所述第一网络切片相关联；从所述AMF设备接收第一指示信息，所述第一指示信息用于指示以下至少一项：
指示所述装置释放无线连接；
指示所述装置进入空闲态之后，发起注册流程；
指示所述装置当前接入的所述第一接入网设备不支持所述第一网络切片；
指示所述装置接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
指示所述装置接入所述第一接入网设备所选择的所述第一无线资源信息错误；
指示所述装置根据所述第二无线资源信息接入所述第一网络切片。
在一种示例中，所述第一接入网设备不支持所述第一网络切片；所述处理器710，用于根据所述第二无线资源信息选择第二接入网设备，所述第二接入网设备支持所述第一网络切片。
在一种示例中，所述装置接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片，所述处理器710，用于根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。
在一种示例中，所述处理器710，用于发起无线连接释放流程，进入空闲态之后，并发起注册流程，以及根据所述第二无线资源接入所述第一网络切片。
在一种示例中，所述收发器720在用于接收第二无线资源信息时，具体用于：从所述第一接入网设备接收来自所述AMF设备的第二无线资源信息；或者，接收来自所述第一接入网设备的第二无线资源信息。
在一种示例中，所述收发器720，在用于接收来自所述第一接入网设备的第二无线资源信息之前，还用于向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息。
在一种示例中，所述存储器730，用于存储所述第二无线资源信息，所述第一指示信息等。
在一个实施例中，装置700能够执行上述图2、图3、图4和图5的方法中由第一接入网设备执行的各个步骤。装置700可以为第一接入网设备，也可以为应用于第一接入网设备中的芯片。
在一种示例中，所述收发器720，用于接收来自终端的第一消息，并向接入与移动性管理功能AMF设备发送所述第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；以及接收来自所述AMF设备的第二消息，所述第二消息包括第二无线资源信息和第一指示信息，所述第二无线资源信息与所述第一网络切片相关联；
所述第一指示信息用于指示以下至少一项：
指示所述装置释放无线连接；
指示所述装置不支持所述第一网络切片；
指示所述终端接入所述装置所选择的所述第一无线资源信息不支持所述第一网络切片；
指示所述终端接入所述装置所选择的所述第一无线资源信息错误。
在一种示例中，所述处理器710，用于释放无线连接。
在一种示例中，所述收发器720，还用于向所述AMF设备发送所述终端接入所述装置所选择的第一无线资源信息。
在一种示例中，所述装置接收到的所述第二无线资源信息为RFSP索引值；所述收发器720，还用于向所述终端或者所述AMF设备发送所述RFSP索引值对应的频段优先级列表信息。
在一种示例中，所述收发器720在用于向所述终端发送所述RFSP索引值对应的频段优先级列表信息之前，还用于接收所述终端发送的请求消息，所述请求消息携带所述第一 网络切片的标识；所述请求消息用于获取所述第二无线资源信息，所述请求消息用于获取的所述第二无线资源信息为频段优先级列表信息。
在一种示例中，所述存储器730，用于存储所述第二无线资源信息，所述第一指示信息等。
上述的处理器可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片或其他通用处理器。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)及其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等或其任意组合。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或非易失性存储器，或可包括易失性和非易失性存储器两者。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)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如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)。应注意，本申请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。
本申请实施例所述的收发装置、接口电路、或者收发器中可以包括单独的发送器，和/或，单独的接收器，也可以是发送器和接收器集成一体。收发装置、接口电路、或者收发器可以在相应的处理器的指示下工作。可选的，发送器可以对应物理设备中发射机，接收器可以对应物理设备中的接收机。
本申请实施例还提供了一种计算机可读存储介质，存储有计算机程序，该计算机程序被计算机执行时，可以使得所述计算机用于执行上述通信的方法。例如执行上述图2、图3、图4和图5的示例中的通信的方法。
本申请实施例还提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机可以执行上述提供的通信的方法。例如执行上述图2、图3、图4和图5的示例中的通信的方法。
本申请实施例还提供了一种通信的系统，所述通信系统包括：执行上述通信的方法的AMF设备和第一接入网设备。可选的，还可以包括终端。可选的，还可以包括PCF设备。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包括有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程 序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包括这些改动和变型在内。

Claims (31)

  1. 一种通信的方法，其特征在于，所述方法包括：
    接入与移动性管理功能AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    所述AMF设备确定所述第一接入网设备不支持所述第一网络切片；
    所述AMF设备向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。
  2. 一种通信的方法，其特征在于，所述方法包括：
    接入与移动性管理功能AMF设备从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    所述AMF设备确定所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；
    所述AMF设备向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一接入网设备或所述终端。
  3. 如权利要求2所述的方法，其特征在于，还包括：
    所述AMF设备接收来自所述第一接入网设备的所述第一无线资源信息。
  4. 如权利要求1-3任一项所述的方法，其特征在于，当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息为无线接入技术/频点优先选择RFSP索引值；当所述第一通信设备为所述终端时，所述第二无线资源信息为频段优先级列表信息。
  5. 如权利要求1-4任一项所述的方法，其特征在于，所述第一网络切片为所述AMF设备允许所述终端接入的网络切片，或者为所述AMF设备拒绝所述终端接入的网络切片。
  6. 如权利要求1-5任一项所述的方法，其特征在于，所述第二消息还包括：第一指示信息；
    当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：
    指示所述终端释放无线连接；
    指示所述终端进入空闲态之后，发起注册流程；
    指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；
    指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。
  7. 如权利要求1-5任一项所述的方法，其特征在于，所述第二消息还包括：第一指示信息；
    当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：
    指示所述第一接入网设备释放无线连接；
    指示所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。
  8. 如权利要求1-7任一项所述的方法，其特征在于，还包括：
    所述AMF设备向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；
    所述AMF设备接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。
  9. 一种通信的方法，其特征在于，所述方法包括：
    终端通过第一接入网设备向接入与移动性管理功能AMF设备发送第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    所述终端接收第二无线资源信息，所述第二无线资源信息与所述第一网络切片相关联；
    所述终端从所述AMF设备接收第一指示信息，所述第一指示信息用于指示以下至少一项：
    指示所述终端释放无线连接；
    指示所述终端进入空闲态之后，发起注册流程；
    指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的第一无线资源信息错误；
    指示所述终端根据所述第二无线资源信息接入所述第一网络切片。
  10. 如权利要求9所述的方法，其特征在于，所述第一接入网设备不支持所述第一网络切片；所述方法还包括：
    所述终端根据所述第二无线资源信息选择第二接入网设备，所述第二接入网设备支持所述第一网络切片。
  11. 如权利要求9所述的方法，其特征在于，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片，所述方法还包括：
    所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片。
  12. 如权利要求9-11任一项所述的方法，其特征在于，还包括：
    所述终端发起无线连接释放流程，进入空闲态之后，并发起注册流程，以及根据所述第二无线资源接入所述第一网络切片。
  13. 如权利要求9-12任一项所述的方法，其特征在于，所述终端接收第二无线资源信息，包括：
    所述终端从所述第一接入网设备接收来自所述AMF设备的第二无线资源信息；或者，
    所述终端接收来自所述第一接入网设备的第二无线资源信息。
  14. 如权利要求13所述的方法，其特征在于，所述终端接收来自所述第一接入网设备的第二无线资源信息之前，方法还包括：
    所述终端向所述第一接入网设备发送请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息。
  15. 一种通信的方法，其特征在于，所述方法包括：
    第一接入网设备接收来自终端的第一消息，并向接入与移动性管理功能AMF设备发送所述第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    所述第一接入网设备接收来自所述AMF设备的第二消息，所述第二消息包括第二无线资源信息和第一指示信息，所述第二无线资源信息与所述第一网络切片相关联；
    所述第一指示信息用于指示以下至少一项：
    指示所述第一接入网设备释放无线连接；
    指示所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的第一无线资源信息错误。
  16. 如权利要求15所述的方法，其特征在于，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一接入网设备不支持所述第一网络切片；或者，所述第二无线资源信息用于所述终端选择所述第一接入网设备，所述第一接入网设备支持所述第一网络切片，所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片。
  17. 如权利要求15或16所述的方法，其特征在于，还包括：
    所述第一接入网设备释放无线连接。
  18. 如权利要求15-17任一项所述的方法，其特征在于，还包括:
    所述第一接入网设备向所述AMF设备发送所述终端接入所述第一接入网设备所选择的第一无线资源信息。
  19. 如权利要求15-18任一项所述的方法，其特征在于，所述第一接入网设备接收到的所述第二无线资源信息为RFSP索引值，还包括：
    所述第一接入网设备向所述终端或者所述AMF设备发送所述RFSP索引值对应的频段优先级列表信息。
  20. 如权利要求19所述的方法，其特征在于，所述第一接入网设备向所述终端发送所述RFSP索引值对应的频段优先级列表信息之前，方法还包括：
    所述第一接入网设备接收所述终端发送的请求消息，所述请求消息携带所述第一网络切片的标识；所述请求消息用于获取所述第二无线资源信息，所述请求消息用于获取的所述第二无线资源信息为频段优先级列表信息。
  21. 一种通信的装置，其特征在于，所述装置包括：
    收发模块，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    处理模块，用于确定所述第一接入网设备不支持所述第一网络切片；
    所述收发模块，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端选择第二接入网设备，所述第二接入网设备支持所述第一网络切片，所述第一通信设备为所述第一接入网设备或所述终端。
  22. 一种通信的装置，其特征在于，所述装置包括：
    收发模块，用于从第一接入网设备接收来自终端的第一消息，所述第一消息包括所述终端请求接入的第一网络切片的标识；
    处理模块，用于确定所述终端接入所述第一接入网设备所选择的第一无线资源信息不支持所述第一网络切片；
    所述收发模块，还用于向第一通信设备发送第二消息，所述第二消息包括：第二无线资源信息，所述第二无线资源信息用于所述终端根据所述第二无线资源信息接入所述第一接入网设备，所述第一接入网设备支持所述第一网络切片；所述第一通信设备为所述第一接入网设备或所述终端。
  23. 如权利要求22所述的装置，其特征在于，所述收发模块，还用于接收来自所述第一接入网设备的所述第一无线资源信息。
  24. 如权利要求21-23任一项所述的装置，其特征在于，当所述第一通信设备为所述第一接入网设备时，所述第二无线资源信息为无线接入技术/频点优先选择RFSP索引值；当所述第一通信设备为所述终端时，所述第二无线资源信息为频段优先级列表信息。
  25. 如权利要求21-24任一项所述的装置，其特征在于，所述第一网络切片为所述装置允许所述终端接入的网络切片，或者为所述装置拒绝所述终端接入的网络切片。
  26. 如权利要求21-25任一项所述的装置，其特征在于，所述第二消息还包括：第一指示信息；
    当所述第一通信设备为所述终端时，所述第一指示信息用于指示以下至少一项：
    指示所述终端释放无线连接；
    指示所述终端进入空闲态之后，发起注册流程；
    指示所述终端当前接入的所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误；
    指示所述终端根据所述第二无线资源信息接入所述第一网络切片，所述第一网络切片与所述第二无线资源信息相关联。
  27. 如权利要求21-25任一项所述的装置，其特征在于，所述第二消息还包括：第一指示信息；
    当所述第一通信设备为所述第一接入网设备时，所述第一指示信息用于指示以下至少一项：
    指示所述第一接入网设备释放无线连接；
    指示所述第一接入网设备不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息不支持所述第一网络切片；
    指示所述终端接入所述第一接入网设备所选择的所述第一无线资源信息错误。
  28. 如权利要求21-27任一项所述的装置，其特征在于，所述收发模块，还用于向策略控制功能PCF设备发送第三消息，所述第三消息包括所述第一网络切片；接收来自所述PCF设备的第四消息，所述第四消息包括所述RFSP索引值。
  29. 一种通信的装置，其特征在于，所述装置包括：处理器和存储器；所述处理器和所述存储器之间电偶合；
    所述存储器，用于存储计算机程序指令；
    所述处理器，用于执行所述存储器中的部分或者全部计算机程序指令，当所述部分或者全部计算机程序指令被执行时，以实现如权利要求1-8任一项所述的方法，或者实现如权利要求9-14任一项所述的方法，或者实现如权利要求15-20任一项所述的方法。
  30. 如权利要求29所述的装置，其特征在于，还包括：
    收发器，用于发送所述处理器处理后的信号，或者接收信号输入给所述处理器。
  31. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机实现如权利要求1-8任一项所述的方法，或者实现如权利要求9-14任一项所述的方法，或者实现如权利要求15-20任一项所述的方法。
PCT/CN2021/077701 2020-05-15 2021-02-24 一种通信的方法及装置 Ceased WO2021227599A1 (zh)

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