Patent ID: 9025515
Filing Date: 2015-05-05
Classification: H04B,H04L,H04W

Abstract:
1. A method of transmitting control information in a radio communication system that uses a plurality of subframes including multiple OFDM symbols or SC-FDMA symbols, the method performed by a relay station and comprising: receiving bitmap information on a backhaul downlink subframe pattern indicating first downlink subframes; obtaining control information regarding non-Multicast Broadcast Single Frequency Network (MBSFN) subframes; receiving feedback information used for a channel status information (CSI) report of the relay station, wherein the feedback information indicates CSI report periodicity and a CSI subframe offset; determining second downlink subframes allocated for a backhaul link, wherein the second downlink subframes includes backhaul downlink subframes corresponding remaining subframes other than the non-MBSFN subframes among the first downlink subframes; determining uplink subframes by applying a fixed offset to the second downlink subframes; modifying the CSI report periodicity and the CSI subframe offset to enable the CSI report to be transmitted on at least one of the uplink subframes; and transmitting the CSI report based on the modified periodicity and the modified CSI subframe offset.