Patent ID: 11871285
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A target base station for performing a method of ensuring a service continuity, the target base station comprising:
a processor,
wherein the processor is configured to perform:
receiving a handover request message from a source base station when a user equipment (UE) moves from a coverage of the source base station to a coverage of the target base station;
setting a session for the UE based on slice information included in the handover request message; and
transmitting a handover request acknowledgment (ACK) message for the handover request message to the source base station,

wherein the target base station provides, when a service slice corresponding to a service provided from the source base station to the UE through a protocol data unit (PDU) session is not supported by the target base station, the service using a utility slice,
wherein the target base station stores a slice mapping table, where a slice mapping relationship between the service slice and the utility slice is recorded as slice history information,
wherein the slice mapping relationship comprises an identifier of the service slice provided from the source base station to the UE through a protocol data unit (PDU) session, and
wherein the slice history information is used in processing a handover.