Push-To-Talk Communication Over Two Different Communication Networks

A method for push-to-talk communication between at least four communication terminals;

• at least one first communication terminal—and a second communication terminal being adapted to exchange with each other data streams, corresponding to push-to-talk communications, on a first communication network using the Internet protocol;
• a third communication terminal and at least one fourth communication terminal being adapted to exchange with each other data streams, corresponding to push-to-talk communications, on a second communication network using a protocol different from the Internet protocol;
• the second communication terminal and the third communication terminal being further connected to the same communication accessory;
• the method comprising:
• transmitting, by a first communication terminal, to the second communication terminal, a data stream of a push-to-talk communication on a specific push-to-talk transmission channel of the first network;
• identifying, by the second communication terminal, a specific push-to-talk broadcast channel of the second network associated with the specific push-to-talk transmission channel of the first network;
• transmitting, by the second communication terminal, to the communication accessory, a signal indicating a start of data transmission and comprising an identifier of the specific push-to-talk broadcast channel of the second network;
• transmitting, by the second communication terminal, to the communication accessory, an audio signal corresponding to the data stream of the push-to-talk communication;
• transmitting, by the communication accessory, to the third communication terminal, a signal indicating a start of data transmission on the specific push-to-talk broadcast channel of the second network;
• transmitting, by the communication accessory, to the third communication terminal, the audio signal corresponding to the data stream of the push-to-talk communication;
• and
• transmitting, by the third communication terminal, to a fourth communication terminal, a data stream of a push-to-talk communication corresponding to the audio signal received from the communication accessory, on the specific push-to-talk broadcast channel of the second network.

A push-to-talk communication terminal adapted to be connected to a communication accessory;

• the terminal being configured to perform first operations comprising:
• after reception of a data transmission start signal, originating from the communication accessory, indicating a start of data transmission and comprising an identifier of a specific push-to-talk broadcast channel of a second network;
• identifying a specific push-to-talk transmission channel of a first network associated with the specific push-to-talk broadcast channel of the second network, based on the identifier;
• and after reception of an audio signal, originating from the communication accessory, corresponding to a push-to-talk communication emitted on the second network:
• sending a data stream on the identified specific push-to-talk transmission channel of the first network, the data stream corresponding to the audio signal received from the communication accessory;
• or
• the terminal being configured to perform second operations comprising:
• after reception of a data stream of a push-to-talk communication on a specific transmission channel of a first network:
• identifying a specific push-to-talk broadcast channel of the second network associated with the specific push-to-talk transmission channel of the first network;
• sending, to the communication accessory, a signal indicating a start of data transmission and comprising an identifier of the specific push-to-talk broadcast channel of the second network;
• and
• sending, to the communication accessory, an audio signal corresponding to the data stream of the push-to-talk communication received on the specific transmission channel of the first network.

A communication accessory adapted to be connected to a communication terminal of a first communication network and to a communication terminal of a second communication network,

• the communication terminal of the first network being configured to exchange data streams, corresponding to push-to-talk communications, on a first communication network using the Internet protocol;
• the communication terminal of the second network being configured to exchange data streams, corresponding to push-to-talk communications, on a second communication network using a protocol different from the Internet protocol;
• the communication accessory being configured to perform the following operation:
• after reception of an audio signal corresponding to a data stream of a push-to-talk communication emitted on the specific broadcast channel of the second network, originating from the communication terminal of the second network:
• sending, to the communication terminal of the first network, a signal indicating a start of data transmission and comprising an identifier of the specific push-to-talk broadcast channel of the second network;
• or
• the communication accessory being configured to perform the following operation:
• after reception of a signal indicating a start of data transmission and comprising an identifier of the specific push-to-talk broadcast channel of the second network, originating from the communication terminal of the first network:
• sending, to the communication terminal of the second network, a signal indicating a start of data transmission and comprising an identifier of the specific push-to-talk broadcast channel of the second network.