Patent ID: 7873378
Filing Date: 2011-01-18
Classification: H04B,H04W

Abstract:
1. A method of reducing setup delay for an uplink message from a user terminal (UT) in a push-to-talk over cellular (PoC) service in a radio telecommunications system, the method comprising: sensing an indication of an anticipated push-to-talk over cellular (PoC) transmission from the terminal; on basis of the sensed indication the user terminal making a prediction that delay sensitive data is to be transmitted, the delay sensitive data being push-to-talk over cellular (PoC) data; sending, in response to the prediction, a connection setup signal from the terminal to a basestation subsystem in order to set up an early uplink radio connection for the push-to-talk over cellular (PoC) transmission; and then transmitting the delay sensitive data over the early uplink connection in conjunction with the push-to-talk over cellular (PoC) transmission from the terminal; wherein the act of predicting comprises recognizing reception of a push-to-talk over cellular (PoC) response signal allowing the user to transmit a push-to-talk over cellular (PoC) message.