Method for providing a data exchange during a group call in a cellular network

摘要

The process involves broadcasting status information of an uplink (9) of a group channel on a downlink (8) of the channel, to authorize a data transmission upon a request of a broadcast listener (2) when the uplink is available. A blocking information of the uplink is broadcast simultaneously on the down link. A signal requesting the concerned listener to establish a data transmission request is broadcast on the down link. The listener is temporarily assigned with a dedicated channel by a network when a request is presented by the listener.