ARQ system with status and packet acknowledgement

摘要

A communication system comprises a downlink indicator channel (DL1) for the transmission of a indicator signal (302) indicating that a data packet (202) is scheduled to be transmitted on a downlink data channel (DLz) from a primary station to a secondary station. In operation, on detection of the indicator signal, the secondary station transmits a status signal, for example a negative acknowledgement signal (204), on an uplink channel (UL) to the primary station immediately before transmission of a positive (206) or negative acknowledgement signal to indicate the status of the received data packet. By providing the primary station with two chances to detect the case where the secondary station fails to detect the indicator signal, peak power requirements of the uplink channel can be reduced, thereby reducing system interference levels.

主权项

1. A secondary station comprising:
a transceiver system receiving an indicator signal and a data packet in corresponding time slots of a corresponding first channel and a second channel, respectively; and a processor in communication with the transceiver system, the processor:
detecting at least one of the received indicator signal and the data packet; andcausing at least one first acknowledgment signal to be transmitted through the transceiver system, the at least one first acknowledgement signal indicating detection of the indicator signal, and causing at least one second acknowledgement signal indicating detection of the data packet, wherein the at least one second acknowledgment signal corresponding to detection of the data packet is transmitted in a sub-frame subsequent to a sub-frame containing the at least one first acknowledgement signal corresponding to detection of the indicator signal.