Patent ID: 9603125
Date: 2017-03-21
CPC Classifications: H04L,H04W

Claim:
1. A method for receiving data in a user equipment (UE) from a base station in a mobile communication system, the method comprising: receiving control information on an enhanced physical downlink control channel (EPDCCH) based on a demodulation reference signal (DM-RS) antenna port; and receiving the data based on the control information, wherein the DM-RS antenna port is determined based on information related to an enhanced control channel elements (ECCE) of the EPDCCH, a radio network temporary identity (RNTI) of the UE, and a number of ECCEs in the EPDCCH if a value of an aggregation level is larger than 1, and the DM-RS antenna port is determined based on the information related to the ECCE of the EPDCCH and the number of ECCEs in the EPDCCH with the exception of the RNTI of the UE if the value of the aggregation level is 1.