Handling of network slice information for roaming user equipment (UE)

A method for wireless communications by a user equipment (UE), comprising:

• sending, to a network entity, a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises a first Visited Public Land Mobile Network (VPLMN) and the target network comprises a second VPLMN;
• receiving, from the network entity, a response with an IE identifying one or more of the PDU sessions allowed to be transferred to the target network and indicating slice information applicable in the target network for one or more PDU sessions allowed to be transferred;
• and
• updating slice information for each of the PDU sessions allowed to be transferred based on the IE in the response.

A method for wireless communications by a network entity, comprising:

• receiving, from a user equipment (UE), a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises an evolved packet system (EPS) and the target network comprises a Visited Public Land Mobile Network (VPLMN);
• determining slice information for one or more of the PDU sessions allowed to be transferred;
• and
• sending, to the UE, a response with an IE identifying the one or more of the PDU sessions allowed to be transferred to the target network and indicating the slice information applicable in the target network for one or more PDU sessions allowed to be transferred.

A method for wireless communications by a network entity, comprising:

• receiving, from a user equipment (UE), a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises a first Visited Public Land Mobile Network (VPLMN) and the target network comprises a second VPLMN;
• determining slice information for one or more of the PDU sessions allowed to be transferred;
• and
• sending, to the UE, a response with an IE identifying the one or more of the PDU sessions allowed to be transferred to the target network and indicating the slice information applicable in the target network for one or more PDU sessions allowed to be transferred.

An apparatus for wireless communications by a user equipment (UE), comprising:

• a memory;
• and
• at least one processor communicatively coupled to the memory, the memory comprising instructions executable by the at least one processor to cause the apparatus to:
• send, to a network entity, a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises an evolved packet system (EPS) and the target network comprises a Visited Public Land Mobile Network (VPLMN);
• receive, from the network entity, a response with an IE identifying one or more of the PDU sessions allowed to be transferred to the target network and indicating slice information applicable in the target network for one or more PDU sessions allowed to be transferred;
• and
• update slice information for each of the PDU sessions allowed to be transferred based on the IE in the response.

An apparatus for wireless communications by a user equipment (UE), comprising:

• a memory;
• and
• at least one processor communicatively coupled to the memory, the memory comprising instructions executable by the at least one processor to cause the apparatus to:
• send, to a network entity, a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises a first Visited Public Land Mobile Network (VPLMN) and the target network comprises a second VPLMN;
• receive, from the network entity, a response with an IE identifying one or more of the PDU sessions allowed to be transferred to the target network and indicating slice information applicable in the target network for one or more PDU sessions allowed to be transferred;
• and
• update slice information for each of the PDU sessions allowed to be transferred based on the IE in the response.

An apparatus for wireless communications by a network entity, comprising:

• a memory;
• and
• at least one processor communicatively coupled to the memory, the memory comprising instructions executable by the at least one processor to cause the apparatus to:
• receiving, from a user equipment (UE), a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises an evolved packet system (EPS) and the target network comprises a Visited Public Land Mobile Network (VPLMN);
• determining slice information for one or more of the PDU sessions allowed to be transferred;
• and
• sending, to the UE, a response with an IE identifying the one or more of the PDU sessions allowed to be transferred to the target network and indicating the slice information applicable in the target network for one or more PDU sessions allowed to be transferred.

An apparatus for wireless communications by a network entity, comprising:

• a memory;
• and
• at least one processor communicatively coupled to the memory, the memory comprising instructions executable by the at least one processor to cause the apparatus to:
• receiving, from a user equipment (UE), a request with an information element (IE) indicating one or more protocol data unit (PDU) sessions to be transferred from a source network to a target network, wherein the source network comprises a first Visited Public Land Mobile Network (VPLMN) and the target network comprises a second VPLMN;
• determining slice information for one or more of the PDU sessions allowed to be transferred;
• and
• sending, to the UE, a response with an IE identifying the one or more of the PDU sessions allowed to be transferred to the target network and indicating the slice information applicable in the target network for one or more PDU sessions allowed to be transferred.