System and method for channel quality feedback

Details System and method for channel quality feedback System and method for channel quality feedback

H - Electricity

04

W

H04W 24/08 (2009.01) H04W 72/12 (2009.01)

Patent

CA 2475517

Methods and apparatus are presented for improving the feedback of channel information to a serving base station, which allows a reduction in the reverse link load while allowing the base station to improve the forward link data throughput. Over a channel quality indicator channel, three subchannels are generated; the re-synch subchannel (600), the differential feedback subchannel(620), and the transition indicator subchannel (630). The information carried on each subchannel can be used separately or together by a base station to selectively update internal registers storing channel conditions. The channel conditions are used to determine transmission formats, power levels, and data rates of forward link transmissions.

L'invention concerne des procédés et des appareils permettant d'améliorer la rétroaction de l'information d'un canal vers une station de base de déserte, permettant une réduction de la charge d'une liaison de retour tout en permettant à la station de base d'améliorer le débit de données en liaison aval. Trois sous-canaux sont générés sur un canal indiquant la qualité du canal ; le sous-canal de re-synch (600), le sous-canal de rétroaction différentielle (620) et le sous-canal indiquant la transition (630). Les informations contenues sur chaque sous-canal peuvent être utilisées séparément ou ensemble par une station de base afin de mettre à jour de manière sélective des registres internes mémorisant des conditions concernant les canaux. Lesdites conditions servent à déterminer les formats de transmission, les niveaux de puissance, et les débits de données des transmissions en liaison aval.

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