Patent ID: 9622221
Date: 2017-04-11
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A method of managing activation and deactivation of a secondary cell performed by a base station (BS) in a multiple component carrier system, the method comprising: configuring a secondary cell in a user equipment (UE); transmitting, to the UE, an activation message indicating activation of the secondary cell configured in the UE; and activating the secondary cell configured in the UE based on the indication of the activation message, starting changing the activated secondary cell to deactivation state if allocation for the activated secondary cell is not performed for a first predetermined time, wherein the changing the activated secondary cell to deactivation state is done within a second predetermined time, wherein the changing the activated secondary cell to deactivation state includes initializing a retransmission buffer regarding the secondary cell, and wherein the second predetermined time is consistent between the UE and the BS.