Method and apparatus for facilitating PTT session initiation and service interaction using an IP-based protocol

摘要

Various embodiments are described which can provide reduced PTT call setup times and a greater degree of service integration for PTT users. A PTT originator's MSC ( 171 ) notifies ( 205 ) the PTT server of a PTT session request before the originator ( 101 ) has the channel and data connection resources to send a PTT session request itself. This enables the PTT server ( 161 ) to trigger ( 207 ) the establishment of channel and data connection resources for the PTT target ( 102 ) before the originator is able to trigger the same by sending a PTT session request itself. Also, the target's MSC ( 172 ) notifies ( 221 ) the PTT server after the target responds to a page for the session, enabling the PTT server to indicate PTT session acceptance ( 223 ) on behalf of the target before the target has the channel and data connection resources to respond to a PTT session request.