Patent ID: 9648586
Date: 2017-05-09
CPC Classifications: H04L,H04W

Claim:
1. A method for a terminal supporting carrier aggregation of multiple component carriers configured for the terminal, the terminal configured to operate in a communication system, the method comprising: performing, by the terminal, a cell search during an initial access procedure on a first component carrier, wherein the cell search includes receiving synchronization signals on the first component carrier for detecting component carrier identifier information for the first component carrier and for performing a time and frequency synchronization with the first component carrier: receiving, by the terminal via the first component carrier, a Radio Resource Control (RRC) signal including component carrier identifier information indicating a second component carrier among the multiple component carriers configured for the terminal, after the terminal has performed the cell search on the first component carrier; and performing, by the terminal, an access procedure on the second component carrier, wherein the access procedure is performed by using the component carrier identifier information received via the first component carrier to adjust a transmission timing in the second component carrier to correspond to the time synchronization of the first component carrier, wherein the access procedure includes transmitting a random access preamble on the second component carrier without previously performing a synchronization procedure on the second component carrier.