Push-to-talk wireless telecommunications system utilizing a voice-over-IP network
First Claim
1. A method for push-to-talk (PTT) private calls for users in a wireless communications network, comprising:
- receiving a selection of a called party for a private call, the selection being made by a calling party on a mobile device;
determining a first private identification for the called party;
determining a second private identification for the calling party;
transmitting a first SIP SUBSCRIBE including the first and second private identifications to request a speech token associated with the private call;
redirecting the first 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 the speech token;
transmitting calling party information from the PTT Server to the called party;
communicating speech packets from the calling party to the called party in a half-duplex manner;
determining a PTT release command made on the mobile device;
transmitting a second SIP SUBSCRIBE to release the speech token; and
notifying the calling and called parties that the speech token is available.
3 Assignments
0 Petitions
Accused Products
Abstract
System and method for enabling push-to-talk (PTT) private calls in a wireless communications network are described. One embodiment includes selecting a called party private identification for a private call by a calling party on a mobile device; pressing a PTT button 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 the 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; transmitting calling party information from the PTT Server to the called party; communicating speech packets from the calling party to the called party in a half-duplex manner; releasing the PTT button on the mobile device; transmitting a SIP SUBSCRIBE to release the speech token; and notifying the calling and called parties that the group'"'"'s speech token is available.
-
Citations
20 Claims
-
1. A method for push-to-talk (PTT) private calls for users in a wireless communications network, comprising:
-
receiving a selection of a called party for a private call, the selection being made by a calling party on a mobile device; determining a first private identification for the called party; determining a second private identification for the calling party; transmitting a first SIP SUBSCRIBE including the first and second private identifications to request a speech token associated with the private call; redirecting the first 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 the speech token; transmitting calling party information from the PTT Server to the called party; communicating speech packets from the calling party to the called party in a half-duplex manner; determining a PTT release command made on the mobile device; transmitting a second SIP SUBSCRIBE to release the speech token; and notifying the calling and called parties that the speech token is available. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method for push-to-talk (PTT) private calls for users in a wireless communications network, the method comprising:
-
joining a user to a multicast group via the wireless communications network, the multicast group having a calling party further joined to the multicast group; receiving an SIP request code indicating an invitation to join a private call made by the calling party; detecting an acceptance by the user of the invitation to join the private call; transmitting an SIP response code configured to join the user to the private call and to remove the user and the calling party from the multicast group; and receiving speech packets sent from the calling party to the user in a half-duplex manner, wherein at least one of the joining, the receiving of the SIP request code, the detecting, the transmitting, and the receiving of the speech packets is performed by a mobile device. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. A method for push-to-talk (PTT) private calls for users in a wireless communications network, the method comprising:
-
joining a calling party to a multicast group, the multicast group having a called party joined to the multicast group; receiving a selection of the called party to join a private call; transmitting an SIP request code to a PTT server via a wireless communications network, the SIP request code configured to specify the called party and to remove the calling party and the called party from the multicast group; receiving notification of obtaining a speech token corresponding to the private call; transmitting speech packets from the calling party to the called party in a half-duplex manner; and transmitting a command to release the speech token, wherein one of the joining, the receiving of the selection, the transmitting of the SIP request code, the receiving of the notification, the transmitting of the speech packets, and the transmitting of the command is performed by a mobile device. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification