Method and apparatus for providing downlink acknowledgments...

H - Electricity – 04 – W

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H04W 24/00 (2009.01) H04W 24/02 (2009.01) H04W 28/04 (2009.01) H04B 14/08 (2006.01) H04J 11/00 (2006.01)

Patent

CA 2651254

A communication system (100) provides downlink acknowledgments corresponding to uplink transmission using hybrid automatic repeat request to multiple users (101, 102) in an Orthogonal Frequency Division Multiplexing communication system, wherein a frequency bandwidth comprises multiple frequency sub-carriers, by spreading (804) each acknowledgment of multiple acknowledgments with a selected spreading sequence of multiple spreading sequences to produce multiple spread acknowledgments, wherein each acknowledgment is intended for a different user of the multiple users, and distributing (810) the multiple spread acknowledgments across the multiple frequency sub-carriers.

La présente invention concerne un système de communication (100) fournissant des accusés de réception de liaison descendante correspondant à la transmission de la liaison montante à l'aide d'une demande de répétition automatique hybride envoyée à de multiples utilisateurs (101, 102) dans un système de communication par multiplexage par division de fréquence orthogonale, une largeur de bande de fréquence comprenant des ondes sous-porteuses à fréquences multiples, en diffusant (804) chacun de multiples accusés de réception avec une de multiples séquences de diffusion pour produire de multiples accusés de réception diffusés, chaque accusé de réception étant conçu pour un des multiples utilisateurs et répartissant (810) les multiples accusés de réception diffusés à travers les ondes sous-porteuses à fréquences multiples.

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