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

Claim 0:
1. A method of ensuring a service continuity, performed by a target base station, the method comprising:
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 and the source base station maintain and manage a slice mapping table, where a slice mapping relationship between the service slice and the utility slice is recorded as slice history information, and
wherein the slice history information is used in processing a handover.