Push-to-talk wireless telecommunications system utilizing an voice-over-IP network
First Claim
1. A method for PTT private calls for users in a wireless communications network, comprising:
- selecting a called party private identification for a private call by a calling party on a mobile device;
selecting a PTT function on the mobile device;
transmitting a SIP SUBSCRIBE including the calling and called parties private identifications to request a speech token;
redirecting the SIP SUBSCRIBE to a PTT Server for purposes of removing the calling party and the called party from a multicast group;
receiving an acknowledge message that includes a speech token;
communicating speech packets from the calling party to the called party in a half-duplex manner;
transmitting a SIP SUBSCRIBE to release the speech token; and
notifying the calling and called parties that the group'"'"'s speech token is available.
4 Assignments
0 Petitions
Accused Products
Abstract
A method and system to provide push-to-talk from one user to another in a wireless packet data telecommunications network is described. The system may include: a wireless communication network including push-to-talk (PTT) functionality, with a Session Initiation Protocol (SIP) Proxy Server; a SIP Registrar and Location Server operable to store contact addresses of active mobile devices; a Realtime Transport Protocol (RTP) Media Gateway (PTT Server) operable to function as a call endpoint for each of a plurality of mobile devices wherein the plurality of mobile devices are segmented into membership groups, the PTT Server further operable to multicast a communication from one member of the group to the other members of the group; and an Internet Protocol (IP) network interconnecting the SIP Proxy server, the SIP Registrar and Location Server, and the PTT Server.
116 Citations
10 Claims
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1. A method for PTT private calls for users in a wireless communications network, comprising:
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selecting a called party private identification for a private call by a calling party on a mobile device; selecting a PTT function on the mobile device; transmitting a SIP SUBSCRIBE including the calling and called parties private identifications to request a speech token; redirecting the SIP SUBSCRIBE to a PTT Server for purposes of removing the calling party and the called party from a multicast group; receiving an acknowledge message that includes a speech token; communicating speech packets from the calling party to the called party in a half-duplex manner; transmitting a SIP SUBSCRIBE to release the speech token; and notifying the calling and called parties that the group'"'"'s speech token is available. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for PTT private calls for users in a wireless communication network where the users are registered as members of a multicast group, comprising:
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entering a called party private identification for a private call by a calling party on a mobile device; transmitting the calling and called parties'"'"' private identifications by pressing a PTT button on the mobile device; redirecting the called party private identification to a PTT Server, the PTT server operable to temporarily remove the calling party and the called party from the multicast group; transmitting calling party information to the called party from the PTT Server; communicating directly from the calling party and the called party. - View Dependent Claims (9, 10)
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Specification