Network slice selection policy updating method and apparatus

1. A method for network slice, comprising:

sending, by a device, configured network slice selection assistance information (NSSAI) to an access and mobility management function (AMF), wherein the configured NSSAI comprises at least one configured slice identifier including a first slice identifier;

receiving, by the device, allowed NSSAI and indication information from the AMF, wherein the allowed NSSAI comprises at least one allowed slice identifier including a second slice identifier, wherein the indication information indicates a mapping between the at least one configured slice identifier and the at least one allowed slice identifier, wherein the mapping is usable for associating a target application to the second slice identifier in the at least one allowed slice identifier, and wherein the target application is associated with the first slice identifier in the at least one configured slice identifier;

determining, based on a network slice selection policy (NSSP), that the target application corresponds to the first slice identifier in the at least one configured slice identifier, wherein the NSSP comprises a correspondence between the target application and the first slice identifier; and

determining, based on the indication information, that the second slice identifier in the at least one allowed slice identifier corresponds to the target application.

2. The method according to claim 1 , further comprising:

transmitting data of the target application using a session corresponding to the second slice identifier.

3. The method according to claim 2 , wherein the session corresponding to the second slice identifier comprises a protocol data unit (PDU) session corresponding to the second slice identifier.

4. The method according to claim 1 , further comprising:

sending, by the device, a session establishment request comprising the second slice identifier to a network;

establishing the session corresponding to the second slice identifier; and

transmitting data of the target application using the established session corresponding to the second slice identifier.

5. The method according to claim 1 , further comprising transmitting the data of the target application if there is a session corresponding to the second slice identifier, wherein the data of the target application is transmitted using the session corresponding to the second slice identifier.

6. The method according to claim 1 , wherein sending, by the device, the configured NSSAI to the AMF comprises sending, by the device, a registration request to the AMF, wherein the registration request carries the configured NSSAI, and

wherein receiving, by the device, the allowed NSSAI and the indication information from the AMF comprises receiving a registration request response message from the AMF, wherein the registration request response message carries the allowed NSSAI and the indication information.

7. A device, comprising:

a memory storage comprising instructions; and

one or more processors in communication with the memory storage, wherein the one or more processors execute the instructions to:

send configured network slice selection assistance information (NSSAI) to an access and mobility management function (AMF), wherein the configured NSSAI comprises at least one configured first slice identifier including a first slice identifier;

receive allowed NSSAI and indication information from the AMF, wherein the allowed NSSAI comprises at least one allowed slice identifier including a second slice identifier, wherein the indication information indicates a mapping between the at least one configured slice identifier and the at least one allowed slice identifier, wherein the mapping is usable for associating a target application to the second slice identifier in the at least one allowed slice identifier, and wherein the target application is associated with the first slice identifier in the at least one configured slice identifier;

determine, based on a network slice selection policy (NSSP), that a target application corresponds to the first slice identifier in the at least one configured slice identifier, wherein the NSSP comprises a correspondence between the target application and the first slice identifier; and

determine, based on the indication information, that the second slice identifier in the at least one allowed slice identifier corresponds to the target application.

8. The device according to claim 7 , wherein the one or more processors execute the instructions to:

transmit, data of the target application using a session corresponding to the second slice identifier.

9. The device according claim 8 , wherein the session corresponding to the second slice identifier comprises a protocol data unit (PDU) session corresponding to the second slice identifier.

10. The device according to claim 7 , wherein, the one or more processors execute the instructions to:

send a session establishment request comprising the second slice identifier to a network;

establish the session corresponding to the second slice identifier, and transmit data of the target application using the established session corresponding to the second slice identifier.

11. The device according to claim 7 , wherein the one or more processors execute the instructions such that if there is a session corresponding to the second slice identifier, the one or more processors transmit the data of the target application using the session corresponding to the second slice identifier.

12. The device according to claim 7 , wherein sending the configured NSSAI to the AMF comprises the one or more processors executing the instructions to send a registration request to the AMF, wherein the registration request carries the configured NSSAI, and

wherein receiving the allowed NSSAI and the indication information from the AMF comprises the one or more processors executing the instructions to receive a registration request response message from the AMF, wherein the registration request response message carries the allowed NSSAI and the indication information.

13. The device according claim 7 , wherein the device is a terminal.

14. A method for network slice, comprising:

sending, by a device, configured network slice selection assistance information (NSSAI) to an access and mobility management function (AMF) wherein the configured NSSAI comprises at least one configured slice identifier including a first slice identifier;

receiving, by the AMF, the configured NSSAI from the device;

determining, by the AMF, allowed NSSAI, wherein the allowed NSSAI comprises at least one allowed slice identifier including a second slice identifier;

sending, by the AMF, the allowed NSSAI and indication information to the device, wherein the indication information indicates a mapping between the at least one configured slice identifier and the at least one allowed slice identifier; and

receiving, by the device, the allowed NSSAI and the indication information from the AMF, wherein the mapping is usable for associating a target application to the second slice identifier in the at least one allowed slice identifier, and wherein the target application is associated with the first slice identifier in the at least one configured slice identifier.

15. The method according to claim 14 , wherein receiving, by the AMF, the configured NSSAI from the device comprises receiving, by the function AMF, a registration request from the device, wherein the registration request carries the configured NSSAI configured for the device, and

wherein sending, by the AMF, the allowed NSSAI and the indication information to the device comprises sending, by the AMF, a registration request response message to the device, wherein the registration request response message carries the allowed NSSAI and the indication information.

16. The method according to claim 14 , further comprising:

transmitting, by the device, data of the target application using a session corresponding to the second slice identifier.

17. The method according to claim 14 , further comprising:

sending, by the device, a session establishment request comprising the second slice identifier to a network;

establishing, by the device, the session corresponding to the second slice identifier;

transmitting, by the device, data of the target application using the established session corresponding to the second slice identifier.

18. The method according to claim 14 , further comprising:

determining if there is a session corresponding to the second slice identifier; and

transmitting, by the device if there is the session, the data of the target application using the session corresponding to the second slice identifier.

19. A system, comprising:

an-access and mobility management function (AMF); and

a device configured to:

send configured network slice selection assistance information (NSSAI) to the AMF, wherein the configured NSSAI comprises at least one configured slice identifier including a first slice identifier;

receive allowed NSSAI and indication information from the function AMF, wherein the allowed NSSAI comprises at least one allowed slice identifier including a second slice identifier, wherein the indication information indicates a mapping between the at least one configured slice identifier and the at least one allowed slice identifier, wherein the mapping is usable for associating a target application to the second slice identifier in the at least one allowed slice identifier, and wherein the target application is associated with the first slice identifier in the at least one configured slice identifier;

determine, based on a network slice selection policy (NSSP), that the target application corresponds to the first slice identifier in the at least one configured slice identifier, wherein the NSSP comprises a correspondence between the target application and the first slice identifier; and

determine, based on the indication information, that the second slice identifier in the at least one allowed slice identifier corresponds to the target application,

wherein the AMF is configured to:

receive the configured NSSAI from the device;

determine the allowed NSSAI; and

send the allowed NSSAI and the indication information to the device.

20. The system according to claim 19 , wherein the device is configured to:

transmit data of the target application using a session corresponding to the second slice identifier.

21. The system according to claim 19 , wherein the device is configured to:

send a session establishment request comprising the second slice identifier to a network;

establish the session corresponding to the second slice identifier; and

transmit data of the target application using the established session corresponding to the second slice identifier.

22. The system according to claim 19 , wherein the device is configured such that if there is a session corresponding to the second slice identifier, the device transmits the data of the target application using the session corresponding to the second slice identifier.

23. The system according to claim 19 , wherein the AMF is configured to receive a registration request from the device, wherein the registration request carries the configured NSSAI, and

wherein the AMF is configured to send a registration request response message to the device, wherein the registration request response message carries the allowed NSSAI and the indication information.