Efficient automatic repeat request methods and apparatus

Details Efficient automatic repeat request methods and apparatus Efficient automatic repeat request methods and apparatus

2004-02-17

2010-10-12

Trost, IV, William (Department: 2472)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S335000, C455S069000, C714S748000

Reexamination Certificate

active

07813322

ABSTRACT:
Different NAK signals are used to indicate different relative levels of success in regard to an unsuccessful attempt to decode a received signal. An ACK signal is used in the case of successful decoding. The device which generated and transmitted the original encoded signal receives the NAK signal and selects a portion of redundant information, e.g., additional error correction bits, to be transmitted based on the value of the NAK signal. If the NAK signal indicates a low level of decoding success indicating a relatively large number of errors in the decoded signal, a large set of redundant information is selected and transmitted. If the NAK signal indicates a relatively successful decoding, e.g., relatively few errors, a small set of redundant information is selected and transmitted. Where a small set of redundant information is transmitted new information can be transmitted with the redundant information.

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