Policy mapping method and device, and user equipment

1. A method for policy mapping, comprising:

mapping, by a user equipment (UE), a first policy used in a first mobile communication system into a second policy used in a second mobile communication system,

wherein the first policy used in the first mobile communication system comprises a UE route selection policy (URSP),

wherein mapping, by the UE, the first policy used in the first mobile communication system into the second policy used in the second mobile communication system comprises:

mapping, by the UE, all rules or part of rules of the URSP to the second mobile communication system for use,

wherein a first rule of the URSP used in the first mobile communication system and a second rule of the second policy used in the second mobile communication system correspond to a same rule precedence, wherein the second rule is obtained by mapping the first rule.

2. The method of claim 1 , wherein the first rule used in the first mobile communication system and the second rule used in the second mobile communication system correspond to a same traffic descriptor.

3. The method of claim 1 , wherein, in response to the first rule of the URSP being required to be mapped, at least part of parameters of route selection descriptor(s) (RSD(s)) are mapped and/or copied by the UE under the first rule to the second mobile communication system for use.

4. The method of claim 3 , wherein the RSD comprises at least one of following parameters:

a session and service continuity (SSC) mode, single network slice selection assistant information (S-NSSAI), a protocol data unit (PDU) session type, a data network name (DNN), a non-seamless offload indication, an access type preference, a valid time window, and a valid region.

5. The method of claim 4 , wherein at least one of the S-NSSAI or the DNN is mapped by the UE to an access point name (APN).

6. The method of claim 4 , wherein the PDU session type is mapped by the UE to a public data network (PDN) connection type.

7. The method of claim 6 , wherein, under a condition that the PDU session type is an Ethernet type,

in response to an Ethernet PDN connection type being supported by UE and a network in the second mobile communication system, the PDN connection type is mapped by the UE to the Ethernet type; or

the UE maps the PDN connection type to the non-IP type.

8. The method of claim 6 , wherein, under a condition that the PDU session type is an unstructured type, the PDN connection type is mapped by the UE to the non-IP type.

9. The method of claim 4 , wherein at least one of the non-seamless offload indication, the access type preference, the valid time window or the valid region is copied by the UE to the second mobile communication system for use.

10. The method of claim 4 , wherein the SSC mode in the RSD is set by the UE to be null or a first SSC mode.

11. A device for policy mapping, comprising:

a processor; and

a transceiver, connected to the processor and configured to transmit and receive information under control of the processor,

wherein the processor is configured to map a first policy used in a first mobile communication system into a second policy used in a second mobile communication system,

wherein the first policy used in the first mobile communication system comprises a user equipment (UE) route selection policy (URSP),

wherein the processor is configured to map all rules or part of rules of the URSP to the second mobile communication system for use,

wherein a first rule of the URSP used in the first mobile communication system and a second rule of the second policy used in the second mobile communication system correspond to a same rule precedence, wherein the second rule is obtained by mapping the first rule.

12. The device of claim 11 , wherein the first rule used in the first mobile communication system and the second rule used in the second mobile communication system correspond to a same traffic descriptor.

13. The device of claim 11 , wherein the processor is configured to, in response to the first rule of the URSP being required to be mapped, map and/or copy at least part of parameters of route selection descriptor(s) (RSD(s)) under the first rule to the second mobile communication system for use.

14. The device of claim 13 , wherein the RSD comprises at least one of following parameters:

a session and service continuity (SSC) mode, single network slice selection assistant information (S-NSSAI), a protocol data unit (PDU) session type, a data network name (DNN), a non-seamless offload indication, an access type preference, a valid time window, and a valid region.

15. The device of claim 14 , wherein the processor is configured to map at least one of the S-NSSAI or the DNN to an access point name (APN).

16. The device of claim 14 , wherein the processor is configured to map the PDU session type to a public data network (PDN) connection type.

17. The device of claim 16 , wherein under a condition that the PDU session type is an Ethernet type, the processor is further configured to:

in response to an Ethernet PDN connection type being supported by UE and a network in the second mobile communication system, map the PDN connection type to the Ethernet type; or

map the PDN connection type to the non-IP type.

18. The device of claim 16 , wherein under a condition that the PDU session type is an unstructured type, the processor is further configured to map the PDN connection type to the non-IP type.

19. The device of claim 14 , wherein the processor is configured to copy at least one of the non-seamless offload indication, the access type preference, the valid time window or the valid region to the second mobile communication system for use.

20. The device of claim 14 , wherein the processor is configured to set the SSC mode in the RSD to be null or a first SSC mode.