US Patent No. 10,560,911

DEVICE AND METHOD OF HANDLING CARRIER AGGREGATION AND DUAL CONNECTIVITY


Patent No. 10,560,911
Issue Date February 11, 2020
Title Device And Method Of Handling Carrier Aggregation And Dual Connectivity
Inventorship Chih-Hsiang Wu, Taoyuan (TW)
Assignee HTC Corporation, Taoyuan (TW)

Claim of US Patent No. 10,560,911

5. A network comprising a first base station (BS) and a second BS, comprising:at least one storage device; and
at least one processing circuit, coupled to the at least one storage device, wherein the at least one storage device stores, and the at least one processing circuit is configured to execute instructions of:
the first BS connecting to a communication device via a first cell of the first BS with a signaling radio bearer (SRB);
the second BS as a secondary node (SN)connecting to the communication device via a second cell while the first BS as a master node (MN)connecting to the communication device;
the second BS transmitting a SN Modification Required message to the first BS, wherein the SN Modification Required message comprises a secondary cell (SCell) configuration adding a SCell and comprises a random access (RA) channel (RACH) configuration, and the RACH configuration configures at least one RACH resource and an association configuration associating the at least one RACH resource to a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS) transmitted on the SCell;
the first BS transmitting a RRC message comprising the SCell configuration and the RACH configuration on the SRB via the first cell to the communication device;
the first BS receiving a RRC response message responding to the RRC message from the communication device on the SRB via the first cell or a second cell of the first BS;
the second BS receiving a RA preamble from the communication device on the SCell according to the at least one RACH resource;
the second BS transmitting a RA response (RAR) to the communication device on the second cell or the SCell in response to the RA preamble; and
the second BS communicating with the communication device on the SCell according to the SCell configuration.