Patent ID: 9295046
Filing Date: 2016-03-22
CPC Classification: H04L,H04W

Claim Text:
1. A method for transmitting acknowledgment/negative acknowledgement (ACK/NACK) information in response to a downlink transmission in a relay node (RN) of a wireless communication system, the method comprising: receiving, by the RN from a base station (BS), one or more relay physical downlink control channels (R-PDCCHs) transmitted for scheduling the downlink transmission; receiving, by the RN from the BS, the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer greater than 1; and transmitting, by the RN to the BS, the ACK/NACK information for the downlink transmission in the downlink subframe set in one uplink subframe associated with the downlink subframe set, wherein the downlink subframe set and the uplink subframe are configured for a time division duplex (TDD), wherein the one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH), wherein N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 are configured by a higher layer, where M≦N and N is a positive integer greater than 1, wherein each of M PUCCH resources respectively having the indexes 0, 1, 2, . . . , and M−1 among the configured N PUCCH resources corresponds to each of the M downlink subframes, and wherein each of the M downlink subframes associated with the one uplink subframe is sequentially mapped to each of the M PUCCH resources starting from a downlink subframe among the M downlink subframes that is closest in time to the one uplink subframe.