Variable rate broadcast with soft handoff

H - Electricity – 04 – W

Patent

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Details

H04W 36/18 (2009.01) H04W 4/06 (2009.01)

Patent

CA 2574125

Embodiments described herein relate to providing variable rate broadcast services with soft handoff in wireless communications. In an embodiment, a plurality of access points (e.g., servicing various cells in a broadcast area) may transmit a broadcast content in accordance with a rate set. The rate set may include a plurality of distinct data rates each associated with a transmission format, configured to allow the broadcast packets transmitted by the access points to be incrementally combined (e.g., on a per-slot basis at a subscribing AT). The data rates and corresponding transmission formats in the rate set may be selected in relation to the supportable data rates of the cells in the broadcast area, as well as the requirements for supporting soft handoff in these cells.

Les modes de réalisation décrits ici se rapportent à l'apport de services de diffusion à taux variable avec transfert souple dans des communications sans fil. Dans une réalisation, plusieurs points d'accès (par ex. la délivrance de plusieurs cellules dans une zone de diffusion) peuvent transmettre un contenu de diffusion en fonction d'un ensemble de taux. L'ensemble de taux peut comprendre plusieurs taux de données distincts, chacun associé à un format de transmission, configuré pour permettre la combinaison incrémentielle des paquets de diffusion transmis par les points d'accès (par ex. par fente, sur un AT abonné). Les taux de données et les formats de transmission correspondant dans l'ensemble de taux peuvent être sélectionnés en rapport avec les taux de données supportables des cellules dans la zone de diffusion ainsi que les exigences pour supporter les transferts souples dans ces cellules.

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