Patent ID: 9686711
Date: 2017-06-20
CPC Classifications: H04L,H04W

Claim:
1. A method for activating and deactivating serving cells of at least one slave base station set in a terminal by a master base station, comprising: selecting a target serving cell in which a state is changed, among the serving cells of at least one slave base station set in the terminal; generating a MAC control element which instructs a state change of the target serving cell; determining whether an uplink between a target slave base station managing the target serving cell and the terminal is in a synchronous state or in an asynchronous state, wherein in response to the uplink between the target slave base station and the terminal being in an asynchronous state, directly transmitting the MAC control element to the terminal, and wherein in response to the uplink between the target slave base station and the terminal being in a synchronous state, transmitting the MAC control element to the terminal through the target slave base station.