Patent ID: 9131491
Filing Date: 2015-09-08
Classification: H04L,H04W

Abstract:
1. A method of transmitting control information to a base station by a user equipment in a wireless communication system, the method comprising: receiving at least one of a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) in a plurality of downlink subframes from the base station via at least one serving cell configured in the user equipment; and transmitting hybrid automatic repeat request (HARQ) information on an uplink subframe based on first control information and a second control information to the base station, wherein the first control information is generated by bundling a set of acknowledgement/negative acknowledgement (ACK/NACK) information related to the reception of the PDCCH or the reception of the PDSCH indicated by the PDCCH, wherein the bundling is performed per the at least one serving cell configured in the user equipment by a prescribed time unit, wherein the second control information comprises a downlink assignment index (DAI) included in the PDCCH last detected by the user equipment from the received at least one PDCCH in the plurality of downlink subframes, and wherein, if a result of the bundling the set of ACK/NACK information is ACK and a length of the HARQ information is 2-bit, the HARQ information corresponds to ‘min (the DAI+1, 3)’, where ‘min’ denotes a minimum value.