Patent ID: 9674823
Date: 2017-06-06
CPC Classifications: H04L,H04W,Y02D

Claim:
1. A method for transmitting uplink control information at a communication apparatus configured with a plurality of cells including a Primary Cell (PCell) and a Secondary Cell (SCell) in a wireless communication system operating in a Time Division Duplex (TDD) mode, the method comprising: receiving, by the communication apparatus, one or more downlink signals requiring Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) feedback in a set of subframes; and transmitting, by the communication apparatus, reception response information about the one or more downlink signals through a Physical Uplink Control CHannel (PUCCH) on a subframe configured for Scheduling Request (SR) transmission, wherein when a predetermined condition is not satisfied, the reception response information and SR information are multiplexed and transmitted using a first HARQ-ACK PUCCH resource, wherein when the predetermined condition is satisfied, for a positive SR, the reception response information includes information about an ACK count for the one or more downlink signals and is transmitted using a SR PUCCH resource, and the ACK count is set to 0 when the reception response information about the one or more downlink signals includes Discontinuous Transmission (DTX), and wherein the predetermined condition includes at least one of detecting a single downlink signal corresponding to a Downlink Assignment Index (DAI) initial value only on the PCell in the set of subframes, and detecting a single downlink signal scheduled by a Semi-Persistent Scheduling (SPS) only on the PCell in the set of subframes.