Patent ID: 9054771
Filing Date: 2015-06-09
Classification: H04B,H04L,H04W

Abstract:
1. A method for transmitting a relay physical downlink control channel (R-PDCCH) to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system, the method comprising: transmitting information on a resource element pattern indicating resource elements (REs) corresponding to up to eight antenna ports for at least one of a first channel state information-reference signal (CSI-RS) with zero transmission power or a second CSI-RS with non-zero transmission power to the relay node, configuring at least one resource element group (REG) for the R-PDCCH, the at least one REG comprising four consecutively available REs in each of a plurality of orthogonal frequency division multiplexing (OFDM) symbols included in a subframe; mapping the R-PDCCH to transmission resources in units of the REG; and transmitting the R-PDCCH by using the transmission resources to the relay node, wherein all REs corresponding to the up to eight antenna ports are unavailable for configuring the at least one REG if the first CSI-RS or the second CSI-RS occurs in any RE of the all REs corresponding to the up to eight antenna ports.