Patent ID: 9723606
Date: 2017-08-01
CPC Classifications: H04L,H04W

Claim:
1. A method of transmitting an Enhanced Physical Downlink Control Channel (EPDCCH) by an eNB (enhanced Node B) in a wireless communication system, the method comprising: determining, by the eNB, one antenna port used for the EPDCCH carrying Downlink Control Information for a specific UE; and transmitting, by the eNB, the EPDCCH using at least one resource to the specific user equipment (UE) using the one antenna port, wherein an index of the one antenna port is determined based on at least an identifier of the specific UE and a lowest resource index among the at least one resource, wherein a number of the at least one resource corresponds to an aggregation level of the EPDCCH, and wherein: each of the at least one resource is represented by an Enhanced Control Channel Element (ECCE); the index of the one antenna port is determined from n′; n′=(n n d is a number of ECCEs per resource block pair; K is a parameter derived from the identifier of the specific UE is used to derive the parameter K; and mod is a modulo calculation.