Patent ID: 10869349

Abstract:
A network comprising a first base station (BS) and a second BS is configured to execute instructions of the first BS connecting to a communication device via a primary cell (PCell) of the first BS with a first SRB; the second BS as a secondary node (SN) connecting to the communication device via a primary secondary cell (PSCell) with a second signalling radio bearer (SRB) while the first BS as a master node (MN) connects to the communication device; and the second BS transmitting a radio resource control (RRC) message to the communication device, wherein the RRC message configures a secondary cell (SCell) to the communication device for a carrier aggregation (CA) and comprises a random access (RA) channel (RACH) configuration, the RACH configuration configures at least one RACH resource and the RRC message configures an association configuration.