HANDOVER TO A TARGET CELL BEING A NR CELL INCLUDING A FIRST UPLINK (UL) CARRIER BEING A NR UL CARRIER AND A SECOND UL CARRIER BEING A SUPPLEMENTARY (SUL) CARRIER

摘要

The present application relates to management of Uplink, UL, transmissions between a User Equipment, UE, and a second network node in a wireless communications network. The second network node serves a target cell comprising a first UL carrier and a second UL carrier, which may be a New Radio, NR, UL carrier and a Supplementary UL, SUL, carrier. The UE is initially served by a first network node and receives (301) a message from the first network node. The message relates to a handover of the UE to the target cell. The message comprises an indication indicating one or more UL carriers of the target cell. The UE then decides (302) which one or more out of the first UL carrier and the second UL carrier that is corresponding to the indicated one or more UL carriers. The decided one or more UL carriers are for random access in the target cell. When random access is initiated on one of the first or second UL carriers as the decided one or more UL carriers and it fails, random access is initiated on the other one of the second or first UL carriers.