Patent ID: 8565182

Claim:
A method for a user equipment (UE) to feed back acknowledgement information of semi-persistent scheduling (SPS) data packets, comprising: receiving downlink data packets and an uplink data assignment indicator (UL DAI) from a base station (BS), wherein a value of the UL DAI indicates a number (N) of physical downlink shared channel (PDSCH) data packets which are scheduled by the BS for the UE, the number N is greater than 1, a number k (0<k<N) of the PDSCH data packets is/are SPS data packets, and wherein k and N are positive integers; forming a feedback signal comprising N acknowledgements/negative acknowledgements (ACKs/NAKs) acknowledging the N PDSCH data packets, wherein k ACKs/NAKs of the k SPS data packets is/are placed from the (N−k+1)th to the Nth positions of the N ACKs/NAKs; and sending the feedback signal to the BS starting from the ACK/NAK at the first position.