SPLITTING SIGNAL RADIO BEARER ENHANCEMENTS FOR STANDALONE 5G NEW RAT MULTI-CONNECTIVITY

摘要

Systems and methods of a Split SRB are generally described. The protocol stack is split either at the PDCP or the RLC layer. After acceptance of the Split SRB at a SeNB, RRC messaging is sent to the UE to indicate the Split SRB, after which the UE undertakes a Random Access Procedure to get connected with the SeNB. Subsequent RRC messages related to modifications of the E-RAB, or MeNB change, or handover are transmitted directly to the UE from the MeNB and/or through the SeNB. The UE maintains communications with the EPC when the communication path is changed at the EPC from MeNB to the SeNB due to handover or MeNB change.