Patent ID: 7339949
Filing Date: 2008-03-04
Classification: H04B,H04L

Abstract:
1. An Automatic Repeat Request (ARQ) transmitter for transmitting data on a radio channel in a communications system to a receiver, the transmitter comprising: a transmission unit for encoding the data and transmitting an encoded data packet; a receiving unit for receiving a positive or negative acknowledgment message from the receiver indicating that the receiver was or was not able to decode the data packet; and a retransmission section for operating the transmission unit to perform a retransmission if a negative acknowledgment message was received; wherein the transmitter transmits data packets in first predetermined time intervals and receives acknowledgment messages in second predetermined time intervals after the first time intervals; and a control section for monitoring at least two second time intervals for possible reception of one acknowledgment message in response to each transmitted data packet, wherein: said at least two second time intervals are shifted in time by more than the length of a first time interval.