ARQ SYSTEM WITH STATUS AND PACKET ACKNOWLEDGEMENT
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Accused Products
Abstract
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.
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Citations
54 Claims
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1-14. -14. (canceled)
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15. A secondary station comprising:
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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; a processor in communication with said transceiver system, the processor; detecting at least one of said received indicator signal and said data packet; causing at least one first acknowledgment signal to be transmitted through said transceiver system, said at least one first acknowledgement signal indicating detection of said indicator signal and at least one second acknowledgement signal indicating detection of said data packet, wherein said at least one second acknowledgment signal corresponding to detection of said data packet is transmitted in a sub-frame subsequent to a sub-frame containing said at least one first acknowledgement signal corresponding to detection of said indicator signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 54)
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26. A primary station comprising:
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a transmitting system transmitting an indicator signal in a first channel and a data packet in a second channel; a receiving system receiving at least one acknowledgment signal on a third channel, said third channel being divided into a plurality of sub-frames, wherein an acknowledgment signal associated with detection of said indicator signal is received in a sub-frame preceding a sub-frame containing an acknowledgment signal associated with detection of said data packet. - View Dependent Claims (27, 28, 29)
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30. A method for managing data reception in a computer based secondary station, said method comprising:
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detecting an indicator signal on a first downlink channel; transmitting an acknowledgement signal indicating detection of aid indicator signal on an uplink channel; determining whether a data packet has been detected on a second downlink channel within a predetermined time after detection of said indicator signal; transmitting on the uplink channel at least one second acknowledgment signal corresponding to whether said data packet has been detected within said predetermined time, wherein said at least one second acknowledgement signal is in a first state when said data packet has been detected within the predetermined time and is in a second state when said data packet has not been detected within the predetermined time, wherein said acknowledgment signal indicating detection of said indicator signal is transmitted in a sub-frame preceding a sub-frame containing said second acknowledgement signal. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A secondary station comprising:
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a processor in communication with a memory, said memory including code which when accessed by the processor causes said processor to; detect an indicator signal on a first downlink channel; transmit an acknowledgement signal indicating detection of said indicator signal on an uplink channel; determine whether a data packet has been detected on a second downlink channel within a predetermined time after detection of said indicator signal; transmit on the uplink channel at least one second acknowledgment signal corresponding to whether said data packet has been detected within said predetermined time, wherein said at least one second acknowledgement signal is in a first state when said data packet has been detected within the predetermined time and is in a second state when said data packet has not been detected within the predetermined time, wherein said acknowledgment signal indicating detection of said indicator signal is transmitted in a time slot preceding said transmitted second acknowledgement signal. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A primary station for use in a communication system, said communication system having a downlink indicator channel, said primary station transmitting an indicator signal indicating that a data packet is scheduled to be transmitted on a downlink data channel from the primary station to a secondary station, the primary station comprising:
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a transceiver, controlled by a processor, receiving on an uplink channel, which is divided into a plurality of consecutive sub-frames, a status signal indicating receipt of the indicator signal, wherein said status signal is received in a sub-frame before a sub-frame in which a positive or a negative acknowledgement of said data packet is received. - View Dependent Claims (43)
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44. A secondary station for use in a communication system, said communication system having a downlink indicator channel for the transmission of an indicator signal indicating that a data packet is scheduled to be transmitted on a downlink data channel from a primary station to the secondary station, the secondary station comprising:
a transceiver, controlled by a processer, receiving the indicator signal and the data packet, and transmitting on an uplink channel, which is divided into a plurality of sub-frames, a signal to the primary station to indicate a status of a received data packet, and transmitting, in a sub-frame before a sub-frame in which the status of the received data packet is transmitted, a status signal to indicate receipt of the indicator signal. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53)
Specification