Patent ID: 9402252
Filing Date: 2016-07-26
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A method of monitoring a control channel in a multi-antenna system in which a plurality of layers are defined, the method comprising: monitoring, by a single wireless device, a first enhanced physical downlink control channel (EPDCCH) in a first search space; and monitoring, by the single wireless device, a second EPDCCH in a second search space, wherein if the first search space includes one enhanced control channel element (ECCE) according to an aggregation level 1, then the one ECCE of the first EPDCCH in the first search space is mapped with a first layer using a first code word, wherein if the second search space includes two ECCEs including a first ECCE and a second ECCE according to an aggregation level 2, then the first ECCE of the second EPDCCH in the second search space is mapped with the first layer using a second code word and the second ECCE of the second EPDCCH in the second search space is mapped with a second layer using the second code word, wherein the first EPDCCH in the first search space using the aggregation level 1 is modulated with a higher modulation order than the second EPDCCH in the second search space using the aggregation level 2, and wherein the first layer is a lowest layer among the plurality of layers.