Method and apparatus reducing PTT call setup delays
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United States of America Patent
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Feb 5, 2008
Grant Date -
Jun 9, 2005
app pub date -
Apr 5, 2004
filing date -
Dec 5, 2003
priority date (Note) -
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Abstract
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.
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