Patent ID: 7715320

Claim:
A method for controlling transmission of media data, comprising: initiating a session-based PT (Push-To) service between a PT client and a PT server that has established a PT session using Session Initiation Protocol (SIP) techniques; starting, by the PT client, a timer when a media burst revoke message including time information is received from the PT server, where the timer is a client-operated retry-after timer that operates during which the PT client cannot request a permission to send media data to the PT server, and wherein the time information is a value of a server-operated retry-after timer; receiving, by the PT client, a media burst idle message from the PT server after the client-operated retry-after timer is started, wherein the media burst idle message is received from the PT server that has started a stop talking grace timer and that has received last media data and a media burst release message from the PT client before expiry of the stop talking grace timer; and stopping, by the PT client, the client-operated retry-after timer before the client-operated retry-after timer expires, when the media burst idle message is received from the PT server, such that the PT client can request a permission to send media data to the PT server.