Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2005-10-11
2005-10-11
Chase, Shelly (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
Reexamination Certificate
active
06954890
ABSTRACT:
A system and method are provided for a transmitter to delay message retransmission in a noise environment, where a communications network uses a shared channel. The method comprises: transmitting a message on a shared channel, such as a ac powerline medium; failing to receive a received message acknowledgement; deciding that the transmission error is due to a noise; postponing the retransmission of the message; and, following the channel noise transmission error decision, releasing the channel for use by other transmitters. Deciding that the transmission error is due to channel noise includes: monitoring received signals; and, distinguishing between transmission collisions and noise. Postponing the retransmission of the message includes: measuring noise characteristics; estimating the noise burst duration; retransmitting the message after 50% of the estimated duration; if no message acknowledgement is received, retransmitting the message after 90% of the estimated duration; and, retransmitting the message after 99% of the estimated duration.
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Gaskill Garold G.
Gavette Sherman L.
Chase Shelly
Curtin Joseph P.
Ripma David C.
Sharp Laboratories of America Inc.
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