Alcatel Lucent

Marius Lazar

Thomas Froment

A method for establishing a communication session between a first communication client located within a first communication network, and a second communication client, via a signaling server located within a second communication network distinct from the first communication network and connected thereto via a address translation device. The method includes the step of binding a first address and a second address of the first communication client within the address translation device, by having the first communication client transmit registration messages according to the UDP protocol to the communication server. The method further includes saving, at the communication server, an incoming signaling message sent from the second communication client and intended for the first communication client; replying, by the communication server, to the registration message of the first communication client that follows with a reply message requesting that the first communication client send a new registration message using the TCP protocol; and delivering, by the communication server, the incoming signaling message after the new registration message using the TCP protocol has been received from the first communication client.

Method for address translation device traversal for SIP signaling messages through temporary use of the TCP transport protocol

One (SC) of the sockets (SC) is designated to be capable of receiving the data stream received by each socket associated with a selected process, Said socket thereby designated (SC) further comprises an additional receive list (RXS) listing buffer memories containing the data stream received by all of the sockets involved in a selected process. The buffer memories (SKB) of each socket (SC, SC, SC) simultaneously belong to both receive lists (RX, RXS), and each further comprise an additional 'previous' pointer (PPS) indicating the buffer memory which precedes the current buffer memory in the additional receive list (RXS), and an additional 'next' pointer (PSS) indicating the buffer memory which follows the current buffer memory in the additional receive list (RXS), which makes it possible to access the data stream received by the set of sockets involved in said process, in the order in which said received data stream arrived.

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St Remy l'Honore, France

Marius Lazar