Patent ID: 9455809
Filing Date: 2016-09-27
CPC Classification: H04B,H04L

Claim Text:
1. A method of transmitting downlink control information by a base station in a radio access system supporting an enhanced physical downlink control channel (e-PDCCH) transmitted in a state of being multiplexed with a physical downlink shared channel (PDSCH), the method comprising: precoding the downlink control information using a precoding matrix set in a user equipment (UE); transmitting the precoded downlink control information to the UE via the e-PDCCH which is multiplexed with the PDSCH in a first slot of a subframe, and transmitting to the UE a second slot of the subframe with a greater modulation and coding scheme (MCS) level than a MCS level of the first slot, wherein a first codeword is allocated to the downlink control information when the downlink control information includes information related to uplink, wherein a second codeword is allocated to the downlink control information when the downlink control information includes information related to downlink, and wherein a null symbol or a predetermined reference modulation symbol is inserted to a modulation symbol having a smaller symbol length such that modulation symbols from the first codeword and the second codeword have equal bit sizes before the precoding.