Method and apparatus reducing ptt call setup delays

H - Electricity – 04 – W

Patent

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Details

H04W 76/02 (2009.01) H04W 4/10 (2009.01) H04W 88/02 (2009.01) H04W 88/08 (2009.01) H04B 7/216 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2488431

Various embodiments are described herein to address the need for providing substantially reduced PTT call setup delays. Modifications to channel assignment request messaging (400), such as an IS-2000 Reconnect Message and an IS-2000 Origination Message, are described. In addition, the use of common control channel signaling (e.g., 201), changes to page response messaging (e.g., 301) and new uses for A9-Short Data Delivery messaging (e.g., 203 and 303) are described. Embodiments incorporating some or all of these protocol changes, can provide reduced end-to-end call setup time for PTT as it presently exists in IS-2000 systems.

Les divers modes de réalisation de l'invention permettent de répondre au besoin de réduire le temps d'établissement des appels de messagerie vocale instantanée. L'invention permet de modifier les messages de demande d'attribution de canaux (400), par exemple un message de reconnexion IS-2000 ou un message d'origine IS-2000 ainsi que d'utiliser les canaux de signalisation habituels (201), de modifier la réponse à des messages envoyés sur téléavertisseur (301) et d'utiliser de façon novatrice la messagerie de données courtes à interface A9 (203 et 303). Divers modes de réalisation intégrant une partie ou l'ensemble de ces modifications de protocole permettent de réduire le temps d'établissement des communications de bout en bout des appels de messagerie vocale instantanée des systèmes IS-2000 existants.

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