IAB-NODE HANDOVER IN INTER-CU MIGRATION, RECURSIVE F1 AND RRC SIGNALING ASPECTS

摘要

A method by a network node, operating as a target donor CU in an IAB network serving as a candidate donor node for a migrating IAB node and providing connectivity for a UE. A message for IAB handover including contexts of the migrating IAB node and UEs and IAB nodes directly or indirectly served by the migrating IAB node is received (1701). Admission control is performed (1703) for the UEs and IAB nodes. A handover command to a mobile termination, MT, of the migrating IAB node, and each UE and MT of the IAB nodes is prepared (1705). A group handover command that recursively contains handover commands of all the UEs and MTs is generated (1707). A handover acknowledge message including a list of admitted and not admitted PDU session resources and containing the group handover command is sent (1709). A RRC Reconfiguration Complete message is received (1711).