Synchronizing push to talk service in wireless communication system
First Claim
1. A mobile terminal for synchronizing with a server in a shadow area of service in a push-to-talk (PTT) service system, the mobile terminal comprising:
- means for establishing a session with the server;
means for transmitting to and receiving from the server a real time transport control protocol (RTCP) packet and a real time transport protocol (RTP) packet; and
means for ending the session established with the server if the RTP packet or the RTCP packet is not received by the mobile terminal for a certain time.
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Accused Products
Abstract
The present invention relates to synchronizing a terminal and a server in a shadow area of service in a push-to-talk (PTT) service system. An alive report packet is periodically transmitted to a server by a terminal having no permission to send a talk burst. A talk burst idle packet is periodically transmitted to each session-established terminal by the server in an idle state. Sessions are ended between each terminal and server if either the alive report packet or the talk burst idle packet are not received for a certain time. Accordingly, synchronization between the server and the terminal is periodically certified, unnecessary traffic generated due to inconsistent synchronization is decreased, and quality of service is enhanced.
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Citations
30 Claims
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1. A mobile terminal for synchronizing with a server in a shadow area of service in a push-to-talk (PTT) service system, the mobile terminal comprising:
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means for establishing a session with the server;
means for transmitting to and receiving from the server a real time transport control protocol (RTCP) packet and a real time transport protocol (RTP) packet; and
means for ending the session established with the server if the RTP packet or the RTCP packet is not received by the mobile terminal for a certain time. - View Dependent Claims (2, 3, 4, 5)
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6. A method for synchronizing a mobile terminal with a server in a shadow area of service in a push-to-talk (PTT) service system, the method comprising:
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establishing a session with the server;
transmitting to and receiving from the server a real time transport control protocol (RTCP) packet and a real time transport protocol (RTP) packet; and
ending the session established with the server if the RTP packet or the RTCP packet is not received by the mobile terminal for a certain time. - View Dependent Claims (7, 8, 9, 10)
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11. A server for synchronizing with a mobile terminal in a shadow area of service in a push-to-talk (PTT) service system, the server comprising:
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means for establishing a session with the mobile terminal;
means for transmitting to and receiving from the mobile terminal a real time transport control protocol (RTCP) packet and a real time transport protocol (RTP) packet; and
means for ending the session established with the mobile terminal if the RTCP packet is not received by the server for a certain time. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method for synchronizing a server with a mobile terminal in a shadow area of service in a push-to-talk (PTT) service system, the method comprising:
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establishing a session with the mobile terminal;
transmitting to and receiving from the mobile terminal a real time transport control protocol (RTCP) packet and a real time transport protocol (RTP) packet; and
ending the session established with the mobile terminal if the RTCP packet is not received by the server for a certain time. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A method for synchronizing a server with a terminal in a shadow area of service in a push-to-talk (PTT) service system, the method comprising:
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receiving a real time transport protocol (RTP) packet from a first terminal having permission to transmit a talk burst to a second terminal;
receiving an real time transport control protocol (RTCP) packet from the second terminal;
determining that the second terminal is in the shadow area of service if the RTCP packet is not received for a certain time; and
ending a session with the second terminal if the second terminal is in the shadow area of service. - View Dependent Claims (26, 27)
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28. A method for synchronizing a server with a terminal in a shadow area of service in a push-to-talk (PTT) service system, the method comprising:
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transmitting a talk burst idle packet in an idle state to each session-established terminal;
receiving an alive report packet from each session-established terminal; and
ending a session with a specific terminal if the alive report packet is not received from the specific terminal for a certain time. - View Dependent Claims (29, 30)
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Specification