Patent ID: 8937913
Filing Date: 2015-01-20
Classification: H04L

Abstract:
1. A method for detecting a control channel in a carrier aggregation system, the method performed by a terminal supporting the carrier aggregation system and comprising: receiving a first control signal including carrier information indicating candidate carriers allocated to the terminal among two or more carriers used for the carrier aggregation system; performing blind decoding on only the candidate carriers among the two or more carriers based on the carrier information to detect the control channel, without blind decoding all of the two or more carriers; and receiving a second control signal on the detected control channel, wherein a primary carrier of the candidate carriers is blind decoded using a same CCE (Control Channel Element) aggregation level as a legacy terminal which does not support the carrier aggregation system, and one or more secondary carriers of the candidate carriers are blind decoded using aggregation levels adjacent to the aggregation level of the primary carrier, and wherein the first control signal is allocated between a 17th CCE and a (17+N)th CCE, and CCEs between a first CCE and 16th CCE are allocated for both the terminal and the legacy terminal.