Patent ID: 8873541
Filing Date: 2014-10-28
Classification: H04M,H04W

Abstract:
1. A method for establishing a push-to-talk communication session, the method comprising: receiving, by a communication server from a first communication device, a first push-to-talk communication setup request with a service address, wherein the service address comprises a push-to-talk identifier; identifying a second communication device, a third communication device, and a fourth communication device associated with the service address; transmitting, by the communication server, a first push-to-talk call setup request to the second communication device, the third communication device, and the fourth communication device; receiving, by the communication server, a first push-to-talk call setup response from the second communication device and a second push-to-talk call setup response from the third communication device; establishing a first push-to-talk communication session exclusively between the first communication device and the second communication device when the communication server receives the first push-to-talk setup response from the second communication device before receiving the second push-to-talk call setup response from the third communication device; transmitting, by the communication server to the fourth communication device, a notification that the first push-to-talk communication session has been established exclusively between the first communication device and the second communication device when a push-to-talk setup response is not received from the fourth communication device; receiving, by the communication server from the first communication device, a second push-to-talk communication setup request with the service address after the first push-to-talk communication session is terminated; and transmitting, by the communication server, a second push-to-talk call setup request to the second communication device and establishing a second push-to-talk communication session exclusively between the first communication device and the second communication device, in response to the second push-to-talk communication setup request.