Patent ID: 8108757
Filing Date: 2012-01-31
Classification: H04L,H04W

Abstract:
1. A method of transmitting a reception acknowledgement in a wireless communication system, performed by a user equipment, the method comprising: determining M downlink subframes associated with an uplink subframe n at a specific uplink-downlink configuration, where M is the number of elements in a set K in accordance with the specific uplink-downlink configuration; determining a counter value indicating a number of physical downlink control channels (PDCCHs) with an assigned physical downlink shared channel (PDSCH) transmission within downlink subframe n-k, where kεK, each PDCCH carrying a downlink assignment used for each PDSCH transmission, the downlink assignment including a bundling indicator indicating an accumulative number of PDCCHs with the assigned PDSCH transmission up to a present subframe corresponding to the downlink assignment; determining a last bundling indicator having a value of a bundling indicator in a PDCCH detected by the user equipment in a downlink subframe n-ks, where ks is the smallest value in the set K; determining whether at least one downlink assignment is missed based on the last bundling indicator and the counter value; and transmitting an ACK/NACK signal on an uplink physical control channel (PUCCH) in the uplink subframe n if no downlink assignment is missed, wherein the ACK/NACK signal is determined by a logical AND operation of ACK/NACKs for all PDSCH transmissions over the M downlink subframes; and wherein a resource used for transmission of the PUCCH is associated with a resource used for transmission of a PDCCH carrying the downlink assignment in the downlink subframe n-ks.