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Connection optimisation between a mobile communication terminal and a signalling server across a network address translator

A technology of mobile communication terminal and signaling server, applied in the field of IP phone and IP video phone service, can solve the problems of overloaded communication network and low SIP signaling message.

Active Publication Date: 2012-08-08
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Furthermore, choosing too low a value for the lifetime of SIP signaling messages overloads the communication network by sending too many "Register" messages
[0027] These problems appear to be relatively minor today, but the applicant believes that they will become more serious when the use of SIP protocol to establish multimedia sessions increases

Method used

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  • Connection optimisation between a mobile communication terminal and a signalling server across a network address translator
  • Connection optimisation between a mobile communication terminal and a signalling server across a network address translator
  • Connection optimisation between a mobile communication terminal and a signalling server across a network address translator

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Embodiment Construction

[0040] as indicated above and in figure 1As shown in , the invention operates within a multimedia session established between a terminal T and a second terminal, not shown. The word "terminal" refers to any communication device capable of establishing a multimedia session, ie voice over IP, video telephony services, etc. It can be a mobile terminal compatible with the UMTS (Universal Mobile Telecommunications System) or GPRS (Universal Packet Radio System) standard, or a Personal Digital Assistant (PDA), a microcomputer, such as a TM The equipment sold by the company, etc. In the same way, the access network N to which the mobile terminal can connect 1 , N 2 Various technologies (GSM, UMTS, etc.) can be complied with themselves.

[0041] In the jargon of the SIP protocol, these terminals are considered clients. In the following description, the terms "client" and "terminal" will be considered equivalent.

[0042] In a multi-party conference call, multiple other terminals...

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Abstract

A mobile communication terminal (T) comprises a connection means (MCN) for connecting to access networks (N1, N2) and registration means (MREG) for periodically transmitting registration messages to a signaling server (SS) located within a public communication network (PUB) connected to these access networks. It is characterized by a memory (MMEM) capable of associating a validity period with at least some of the access networks, and in that the registration means (MREG) are provided for transmitting registration messages with a periodicity equal to the validity period associated with the access network (N1, N2) to which the terminal (T) is connected.

Description

technical field [0001] The present invention relates to the transmission of multimedia streams over a data communications network. In particular, the present invention is applied to IP (Internet Protocol) telephony, IP video telephony services, and the like. Background technique [0002] Most commonly, these applications require a session to be established between parties. Most commonly, these parties are multimedia terminals such as telecommunication terminals (GSM or UMTS terminals, etc.), personal digital assistants (PDAs), computers, and the like. [0003] The session is established by a so-called "calling" party that "invites" other parties to join the session. These invitations and other signaling messages are typically conveyed by a signaling protocol such as the SIP (Session Initiation Protocol) protocol defined by RFC3261 of the IETF (Internet Engineering Task Force). [0004] These SIP signaling messages are transmitted over the communication network by means of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12
CPCH04L69/329H04L29/06333H04L61/2564H04L29/06326H04L29/12471H04L61/2553H04L29/06H04L29/125H04L65/1073H04L29/06027H04L65/1006H04L29/08576H04L29/12009H04L29/08072H04L29/06197H04L65/1069H04L67/14H04L61/00H04L65/1104H04W88/02H04L9/40H04L65/1101
Inventor T·莱维
Owner ALCATEL LUCENT SAS
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