Communications unit and method of communicating having efficient

Details Communications unit and method of communicating having efficient Communications unit and method of communicating having efficient

1996-11-15

2000-12-12

Grant, William

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

714748, 714749, 714750, 370473, 370474, 370475, H04J 324, H04L 118, H03M 1300, G08C 2502

Patent

active

061612073

ABSTRACT:
A communications unit (10) with a packet subdivider operable on a data packet (200) and an error detecting code generator. An acknowledgement message (NAK) is generated including error detecting code corresponding to packet portions (210-204) from the packet subdivider, thereby requesting retransmission of packet portions. At an originating unit (100) an error detection code is computed for each portion. The computed second error detection code for each sub-portion is compared with the received first error detection code for that portion. Portions for which corresponding error detection codes do not match are identified as bad portions and are retransmitted (220).

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