Transmitting/receiving apparatus and method for packet...

H - Electricity – 04 – B

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H04B 1/707 (2011.01) H04L 1/08 (2006.01) H04L 1/18 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2408131

A transmitting/receiving apparatus and method for packet retransmission in a mobile communication system. Upon request for a retransmission from a receiver, a transmitter inverts initially transmitted coded bits if the retransmission is odd-numbered for the same data, modulates the inverted bits, and transmits the modulated bits to the receiver. Then the receiver recovers the coded bits by demodulation. If the coded bits are retransmitted an odd number of times, the receiver decodes the coded bits after inversion. Thus the error probabilities of initial transmission bits and retransmission bits are averaged in effect and decoding performance is improved.

Un appareil et une méthode d'émission-réception permettant la retransmission de paquets dans un système de communication mobile. Sur la demande d'une retransmission d'un récepteur, un émetteur inverse des bits codés initialement émis si la retransmission est à nombre impair pour les mêmes données, il module les bits inversés et émet les bits modulés au récepteur. Ensuite, le récepteur récupère les bits codés par une démodulation. Si les bits codés sont retransmis, un nombre impair de fois, le récepteur décode les bits codés après l'inversion. Par conséquent, les probabilités d'erreur des bits de transmission initiaux et des bits de retransmission bits font une moyenne et la performance de décodage est améliorée.

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