Header compression enhancement for broadcast/multicast services

H - Electricity – 04 – L

Patent

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Details

H04L 29/06 (2006.01) H04L 12/18 (2006.01)

Patent

CA 2535096

Methods and apparatus for compression of headers in broadcasting BCMCS services in a wireless communication system are described. Techniques used in BCMCS systems without feedback include sending static context information during BCMCS service initialization for use in a decompressor in a mobile station. Techniques used in BCMCS systems with feedback include receiving feedback from distributed mobile station decompressors and adjusting the broadcasting compressor in response to the feedback. Techniques that reduce the number of operating states in both the compressor and the decompressor are described. Techniques to classify flows so that a reduced number of contexts are used to compress/decompress session packet headers in a push-to-talk service are described.

L'invention concerne des procédés et des dispositifs de compression d'en-têtes dans des services de diffusion BCMCS dans un système de communication sans-fil. Les techniques employées dans des systèmes BCMCS sans rétroaction comportent l'envoi d'informations de contextes statiques lors de l'initialisation de services BCMCS pour une utilisation dans un décompresseur dans une station mobile. Les techniques employées dans des systèmes BCMCS avec rétroaction comportent la réception de la rétroaction provenant de décompresseurs de stations mobiles distribuées et l'ajustage du compresseur de diffusion en réponse à la rétroaction. L'invention concerne également des techniques permettant de réduire le nombre d'états de fonctionnement dans le compresseur et le décompresseur. L'invention concerne par ailleurs des techniques destinées à classifier des flux de manière à réduire le nombre de contextes employés pour la compression/décompression d'en-têtes de paquets dans un service de bouton de conversation.

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