Patent ID: 9736775
Date: 2017-08-15
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A method of operating carriers by a user equipment in wireless communication system, the method comprising: receiving, from a base station through a primary carrier configured for the user equipment, a first message, the first message including information related to at least one secondary carrier configured for the user equipment, wherein a number of the at least one secondary carrier configured by the base station for the user equipment is determined based upon a capability of the user equipment, receiving from the base station a second message, the second message including: an indicator instructing an activation of a secondary carrier of at least one secondary carrier, and an index of the secondary carrier; activating the secondary carrier by the user equipment no earlier than a specific subframe offset, the specific subframe offset being a number of subframes after receiving the indicator; receiving, from the base station through the primary carrier, scheduling information associated with the activated secondary carrier, the scheduling information including resource assignment information for the activated secondary carrier; and receiving, from the base station, data through the activated secondary carrier based on the scheduling information associated with the activated secondary carrier.