SCE/DC APPARATUS SYSTEM AND METHOD FOR SCE/DC

摘要

The UE 10 provides information about the potential S''eNB (s). Before the handover occurs, it is possible for the M''eNB 20_2 to determine whether the M''eNB 20_2 constitutes a new SeNB (S''eNB) and which S''eNB constitutes the M''eNB 20_2 , The information is forwarded from the MeNB 20_1 to the M''eNB 20_2. In one of the options, MeNB 20_1 derives key S''-KeNB and transmits S''-KeNB to M''eNB 20_2 for communication protection between UE 10 and S''eNB 30_1. In another option, M''eNB 20_2 derives S''-KeNB from key KeNB * received from MeNB 20_1. The M''eNB 20_2 transmits the S''-KeNB to the S''eNB 30_1. Moreover, various variations for performing SeNB release, SeNB addition, bearer modification, etc., also exist, wherein the order and / or timing may differ during the handover procedure.