Patent ID: 9571261
Date: 2017-02-14
CPC Classifications: H04L,H04W

Claim:
1. A method performed by a base station for a carrier configuration and activation in a carrier aggregation system, comprising: transmitting a first signaling to configure at least one additional carrier to a user equipment (UE) at which the additional carriers are deactivated, and to configure a timer to each additional carrier for the UE by which the carrier is deactivated after the timer expiry; transmitting a second signaling that carries an activation indication to the UE to indicate the UE to activate at least one deactivated additional carrier in the configured carriers for the UE; activating the at least one deactivated additional carrier and controlling the UE to start Physical Downlink Control Channel (PDCCH) monitoring for the activated additional carrier and Physical Downlink Shared Channel (PDSCH) receiving on the activated additional carrier; transmitting PDCCH, which is on the primary carrier or on one other activated additional carrier, for the activated additional carrier for the UE, by which the timer being restarted; and deactivating the activated additional carrier after the corresponding timer expiry and controlling the UE to stop the PDCCH monitoring for the activated additional carrier and the PDSCH receiving on the deactivated additional carrier.