Patent ID: 9184869
Filing Date: 2015-11-10
Classification: H04L

Abstract:
1. A method for transmitting, by a user equipment, uplink control information in a wireless communication system, the method comprising: receiving, from a base station, a plurality of PDCCHs (physical downlink control channels) on a plurality of downlink cells configured for the user equipment; and if the user equipment has a scheduling request to the base station, transmitting, to the base station, ACK/NACK information associated with the plurality of PDCCHs on a SR PUCCH (scheduling request physical uplink control channel) resource to send the ACK/NACK information and a positive scheduling request within a subframe, wherein the ACK/NACK information includes 2-bit information indicating a number of ACKs among ACK/NACKs for the plurality of PDCCHs received on the plurality of downlink cells configured for the user equipment, wherein if the number of ACKs is 0 or at least one discontinuous transmission (DTX) occurs, the number of ACKs is represented by transmission bits ‘0,0’, and otherwise, the number of ACKs is represented by transmission bits ‘1,1’, transmission bits ‘1,0’ or transmission bits ‘0,1’, wherein each of the transmission bits ‘1,1’, the transmission bits ‘1,0’ and the transmission bits ‘0,1’, differently corresponds to three numbers for the number of ACKs, and wherein the number of ACKs is represented by the transmission bits ‘1,1’ when the number of ACKs is 1, 4 or 7, the number of ACKs is represented by the transmission bits ‘1,0’ when the number of ACKs is 2, 5 or 8, and the number of ACKs is represented by the transmission bits ‘0,1’ when the number of ACKs is 3, 6 or 9.