Patent ID: 9386619
Filing Date: 2016-07-05
CPC Classification: H04L,H04W

Claim Text:
1. A method of handling a cell addition for dual connectivity in a communication system comprising a communication device, a first base station and a second base station, the communication device being connected to the first base station, the method being utilized in the first base station and comprising: the first base station transmitting a request message to the second base station, for requesting a cell addition for the communication device; the first base station receiving a response message comprising system information of a cell of the second base station from the second base station in response to the request message; the first base station transmitting a first radio resource control (RRC) message comprising the system information to the communication device, after receiving the response message; the first base station receiving a RRC response message from the communication device in response to the first RRC message; and the first base station transmitting a confirm message to the second base station to confirm the cell addition, after receiving the RRC response message from the communication device; wherein the system information comprises at least one of an uplink configuration of the cell of the second base station and a downlink configuration of the cell of the second base station; wherein the uplink configuration comprises at least one of an uplink carrier frequency, an uplink bandwidth, additional spectrum emission, a parameter p-Max, an uplink power control, a sounding uplink reference signal (RS) configuration, an uplink cyclic prefix length, a physical random access channel (PRACH) configuration, a physical uplink shared channel (PUSCH) configuration, a random access channel (RACH) configuration and a time-division duplexing (TDD) configuration.