Patent ID: 9137840
Filing Date: 2015-09-15
Classification: H04L,H04W

Abstract:
1. A method of managing component carrier (CC) configuration information in a user equipment (UE) that supports carrier aggregation, the method comprising: receiving first CC configuration information from a network, the information related to a first CC among a plurality of CCs configured in the UE; storing the received first CC configuration information; starting a first CC-specific timer related to validity of the received first CC configuration information; receiving a CC removal command related to the first CC from the network; removing the first CC from a CC list according to the received CC removal command while maintaining and storing the first CC configuration information if the first CC-specific timer has not expired; receiving a CC addition command related to the first CC from the network, the CC addition command including second CC configuration information; and adding the first CC and the second CC to the CC list according to the CC addition command, wherein adding the first CC and the second CC comprises: wherein the first CC-specific timer and the second CC-specific timer are controlled separately, wherein a value of the first CC-specific timer and a value of the second CC-specific timer are the same, and wherein the first CC-specific timer is restarted when the CC addition command contains the previously stored first CC configuration information.