Method, server, and terminal for transmitting and receiving data

A method, performed by a terminal, of transmitting and receiving data based on a push to talk (PTT) service, the method comprising:

• transmitting a transmission authority request, including an identifier of a group in which the terminal is included, to a server by the terminal among a plurality of terminals connected to the server;
• receiving information about a transmission authority of the terminal determined based on a determination to add the terminal as a previously authorized transmitting terminal for the identified group;
• transmitting data to the server according to the received information about the transmission authority;
• and
• receiving data transmitted from the previously authorized transmitting terminal, from the server,
• wherein the data from the terminal and the data transmitted from the previously authorized transmitting terminal to the server is transmitted to an unauthorized terminal in the group and data from the terminal is transmitted to the previously authorized transmitting terminal.

A server for transmitting and receiving data based on a push to talk (PTT) service, the server comprising:

• a transceiver configured to receive a transmission authority request from at least one terminal among a plurality of terminals connected to the server;
• and
• a controller coupled with the transceiver and configured to:
• identify a group in which the at least one terminal is included based on the transmission authority request, and
• determine whether to add the at least one terminal as a previously authorized transmitting terminal for the identified group,
• wherein the transceiver is configured to:
• receive first data from the previously authorized transmitting terminal and second data from a newly authorized transmitting terminal in the group based on a result of the determination, and
• transmit the first data and the second data to a plurality of terminals in the group,
• wherein the first data is transmitted to an unauthorized terminal and the newly authorized transmitting terminal, and
• wherein the second data is transmitted to the unauthorized terminal and the previously authorized transmitting terminal.

A terminal for transmitting and receiving data based on a push to talk (PTT) service, the terminal comprising:

• a transceiver configured to transmit a transmission authority request, including an identifier of a group in which the terminal is included, to a server and receive information about a transmission authority of the terminal determined based on a determination to add the terminal as a previously authorized transmitting terminal for the identified group;
• a controller coupled with the transceiver and configured to process data that is to be transmitted to the server, according to the received information about the transmission authority,
• wherein the transceiver transmits the data to the server and receives data transmitted from the previously authorized transmitting terminal from the server, and
• wherein data from the terminal and the data transmitted from the previously authorized transmitting terminal to the server is transmitted to an unauthorized terminal in the group and data from the terminal is transmitted to the previously authorized transmitting terminal.