System and method for establishing first-to-answer call in mission critical push to talk communication

A method for managing a first-to-answer call by a mission critical push to talk (MCPTT) recipient client in a wireless communication system, the method comprising:

• receiving, from a MCPTT server, a first-to-answer call request of a MCPTT originating client;
• and
• transmitting, to the MCPTT server, a first-to-answer call response corresponding to the first-to-answer call request, for the MCPTT originating client to establish a media plane with the MCPTT recipient client.

A mission critical push to talk (MCPTT) server for managing a first-to-answer call in a wireless communication system, the MCPTT server comprising:

• a transceiver;
• and
• a controller, coupled to the transceiver, configured to receive, from a MCPTT originating client, a first-to-answer call request, transmit, to a plurality of MCPTT recipient clients, the first-to-answer call request, receive, from a first MCPTT recipient client among the plurality of MCPTT recipient clients, a first-to-answer call response, and transmit, to the MCPTT originating client, the first-to-answer call response for the MCPTT originating client to establish a media plane with the first MCPTT recipient client.

A mission critical push to talk (MCPTT) originating client for managing a first-to-answer call in a wireless communication system, the MCPTT originating client comprising:

• a transceiver;
• and
• a controller, coupled to the transceiver, configured to transmit, to a MCPTT server, a first-to-answer call request, receive, from the MCPTT server, a first-to-answer call response corresponding to the first-to-answer call request, wherein the first-to-answer call response is for a first MCPTT recipient client among a plurality of MCPTT recipient clients, and establish a media plane with the first MCPTT recipient client through the MCPTT server.

A mission critical push to talk (MCPTT) recipient client for managing a first-to-answer call in a wireless communication system, the MCPTT recipient client comprising:

• a transceiver;
• and
• a controller, coupled to the transceiver, configured to receive, from a MCPTT server, a first-to-answer call request of a MCPTT originating client, and transmit, to the MCPTT server, a first-to-answer call response corresponding to the first-to-answer call request, for the MCPTT originating client to establish a media plane with the MCPTT recipient client.