Patent ID: 8392784
Filing Date: 2013-03-05
Classification: H04L,H04W

Abstract:
1. A method for handling retransmission of a Transmission Time Interval (TTI) bundle in a user equipment (UE) of a wireless communication system, the UE operating in a TTI bundling mode, a first transmission of the TTI bundle being generated according to an uplink grant received on a Physical Downlink Control Channel (PDCCH), follow-up transmissions of the TTI bundle being generated in a non-adaptive retransmission way, the method comprising: performing a bundle retransmission of the TTI bundle, the bundle retransmission being triggered by a Hybrid Automatic Retransmission Request (HARQ) process responsible for the TTI bundle; determining whether to generate a non-adaptive retransmission for a current transmission opportunity according to a last received feedback of this HARQ process no matter whether the current transmission opportunity is a first transmission opportunity of the bundle retransmission or a transmission opportunity within the bundle retransmission when no uplink grant for the current transmission opportunity has been received on the PDCCH; generating the non-adaptive retransmission for the current transmission opportunity if the last received feedback of this HARQ process is a non-acknowledgement signal; and not generating the non-adaptive retransmission for the current opportunity if the last received feedback of this HARQ process is an acknowledgement signal.