Excavating
Patent
1996-02-08
1997-12-23
Baker, Stephen M.
Excavating
H04L 116
Patent
active
057013110
ABSTRACT:
A communication system dispatches packet data (130) from a master transceiver (10) to a slave transceiver (20). A slave transceiver (20) records the successful arrival of the data packet (130) in an acknowledgment history (115). When propagation conditions between a slave transceiver (20) and a master transceiver (10) are non-ideal, an acknowledgment (140) may be lost and needless retransmission of data packet (130) commenced. However, a slave transceiver (20) generates an acknowledgment (140) from an acknowledgment history (115) containing confirmations for multiple data packets contained within an outstanding packet window (120). If a specific acknowledgment (140) does not arrive at a master transceiver (10), a subsequent acknowledgment (140) contains confirmation of a previously received data packet (130) thus avoiding the needless retransmission of a previously successfully received data packet (130).
REFERENCES:
patent: 5483545 (1996-01-01), Darmon et al.
Nakamura et al., "ARQ Scheme Reinforced with Past Acknowledgement Signals", IEEE CH2520-5, 1987, pp. 53-2-1 to 53-2-5, Dec. 1987.
Nanda et al., "A Retransmission Scheme for Circuit-Mode Data on Wireless Links" IEEE Journal on Selected Areas in Communications, vol. 12, No. 8, Oct. 1994, pp. 1338-1352, Oct. 1994.
Baker Stephen M.
Johanson Kevin K.
Motorola Inc.
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