Methods for reducing latency of a call set up

A proactive speculation method decreases the call setup time for private calls ( 200 ) and selective dynamic group calls ( 300 ). In a push-to-talk dispatch network ( 40 ) an originating mobile unit ( 10 ) sends a wake-up packet ( 54, 114 ) to the dispatch network ( 40 ). Prior to initiating the pus...

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Bibliographic Details
Main Author MAY NIGEL M.,MARICK MARK A.,SCHAEFER BRADLEY R.,SHAUGHNESSY MARK L.,SUGDEN WILLIAM J
Format Patent
LanguageEnglish
Published 28.12.2005
Edition7
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:A proactive speculation method decreases the call setup time for private calls ( 200 ) and selective dynamic group calls ( 300 ). In a push-to-talk dispatch network ( 40 ) an originating mobile unit ( 10 ) sends a wake-up packet ( 54, 114 ) to the dispatch network ( 40 ). Prior to initiating the push-to-talk function, the target mobile units ( 20-30 ) receive a wake-up packet ( 68, 146-148 ) from network ( 40 ). Thereby, prior to establishing the push-to-talk function, each of the mobile units in the push-to-talk call have been coupled via RF links. If the originating mobile unit has a current IP address, direct wake-up packets ( 72 ) may be sent.
Bibliography:Application Number: CN200380103570