Patent ID: 7764633

Claim:
A method for managing two-way alternate communication in half-duplex mode between at least two end equipments of a packet switching transport network in non connected mode, comprising setting an indication element, wherein the indication element is separate from voice frames, has as function, when it is present with a first given value in packets which comprise at least one voice frame each and are transmitted from one of said end equipments to a central equipment undertaking the management of the communication, to indicate to said central equipment, on the one hand, that said end equipment acknowledges receipt of the right to send voice frames that is granted to it by said central equipment and, on the other hand, that it is requesting the maintaining of this right to send, and has further as function, when it is present with a second given value in packets which comprise at least one of the last voice frames transmitted from said end equipment to said central equipment undertaking the management of the communication, to indicate to said central equipment that it is relinquishing its right to send; wherein the packet switching transport network in non connected mode is an IP (Internet Protocol) network; wherein the packets transmitted over the network are RTP (Real time Transport Protocol) packets, the communication being set up as an RTP/RTCP (Real time Transport Control Protocol) session; and wherein the indication element is the marking bit of the header of the RTP packets, said first value of the indication element being the logic value 1 or 0, and said second value of the indication element being the inverse logic value 0 or 1, respectively, of said first value of the indication element.