Method of transmitting and receiving ACK/NACK signal and apparatus thereof

摘要

Disclosed is a method for transmitting an ACK/NACK signal for an HARQ (Hybrid Automatic Repeat reQuest) in a CA (Carrier Aggregation) system, the method including obtaining at least one transmission resource among first and second transmission resources; configuring a first table showing a relationship in which a combination of at least one of the first and second transmission resources and modulation symbols is mapped to an ACK/NACK signal, and transmitting modulation symbols corresponding to a transmission target ACK/NACK signal in the first table by using transmission resource corresponding to the transmission target ACK/NACK signal in the first table.

主权项

1. A method for transmitting an acknowledgement/not-acknowledgement (ACK/NACK) for a Hybrid Automatic Repeat reQuest (HARQ) by a user equipment (UE) in a carrier aggregation (CA) system, the method comprising:
receiving, from a base station (BS), downlink control information (DCI) indicating downlink data transmission on a secondary component carrier (SCC), wherein the DCI includes 2 bits of a transmission power control (TPC) field indicating at least two ACK/NACK resources, and the two ACK/NACK resources correspond to n-th ACK/NACK resource value in a first ACK/NACK resource set and n-th ACK/NACK resource value in a second ACK/NACK resource set respectively configured by a higher layer, wherein n is an integer; mapping, based on a channel selection, an ACK/NACK in response to the downlink data transmission onto a combination of one of the two ACK/NACK resource and a modulation symbol; and transmitting, to the BS, the ACK/NACK by using the combination.