Patent ID: 9713044
Date: 2017-07-18
CPC Classifications: H04W

Claim:
1. A method for receiving a radio resource control (RRC) message by a user equipment (UE), comprising: receiving an RRC connection reconfiguration (RRCConnectionReconfiguration) message including secondary cell group (SCG) configuration parameters, wherein a master cell group (MCG) and a SCG are configured for dual connectivity, a first Medium Access Control (MAC) entity is mapped to the MCG, a second Medium Access Control (MAC) entity is mapped to the SCG, the RRC connection reconfiguration message is exchanged via the MCG, the MCG comprises at least a primary cell (PCell), and the SCG comprises at least a primary secondary cell (PSCell), wherein the RRC connection reconfiguration message has a structure to switch between a case that the SCG configuration parameters include a data radio bearer (DRB) configuration and a case that the SCG configuration parameters do not include a DRB configuration, wherein in the case that the SCG configuration parameters include a DRB configuration, a DRB corresponding to the DRB configuration is established to the SCG.