WO2005088933A1 - Installation optimisee de connexions de passerelles multimedia intra-domaines - Google Patents

Installation optimisee de connexions de passerelles multimedia intra-domaines Download PDF

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Publication number
WO2005088933A1
WO2005088933A1 PCT/IB2004/000413 IB2004000413W WO2005088933A1 WO 2005088933 A1 WO2005088933 A1 WO 2005088933A1 IB 2004000413 W IB2004000413 W IB 2004000413W WO 2005088933 A1 WO2005088933 A1 WO 2005088933A1
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WO
WIPO (PCT)
Prior art keywords
mgc
connection
originating
terminating
address
Prior art date
Application number
PCT/IB2004/000413
Other languages
English (en)
Inventor
Julio Martinez-Minguito
Jan Erik Lindquist
Original Assignee
Telefonaktiebolaget Lm Ericsson
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson filed Critical Telefonaktiebolaget Lm Ericsson
Priority to PCT/IB2004/000413 priority Critical patent/WO2005088933A1/fr
Publication of WO2005088933A1 publication Critical patent/WO2005088933A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/006—Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP), including next generation networks with a packet-switched transport layer
    • H04M7/0075—Details of addressing, directories or routing tables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/102—Gateways
    • H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment

Definitions

  • the present invention relates generally to telecommunication networks . More particularly, and not by way of limitation, the invention is directed to a method of establishing a connection between an originating media gateway and a terminating media gateway over an Internet Protocol (IP) network.
  • IP Internet Protocol
  • FIG. 1 is a simplified block diagram of an existing network architecture 10 for providing connections between Media Gateways (MGs) through either an IP network 16 or an Asynchronous Transfer ' Mode (ATM) network 17. Users access the network architecture through one of a plurality of access networks lla-lld.
  • An MG 12 is responsible for establishing connections from the access networks 11a, lib towards other access networks connected to the MG or to other MGs such as MG 13 and MG 14.
  • the MG 12 may establish an IP bearer through an IP Network 15,16 or an Asynchronous Transfer Mode (ATM) bearer through the ATM Network 17.
  • ATM Asynchronous Transfer Mode
  • a Media Gateway Controller (MGC) 21 in the access network receives a call setup request from a user and sends a number of H.248 signaling messages to an originating MG and a terminating MG.
  • the MGs establish the actual network connection and handle the flow of data (media) from the originating user to the terminating user.
  • the MGC obtains information from the originating MG that needs to be passed to the terminating MG for establishment of the connection over IP or ATM.
  • FIG. 2 is a signaling diagram illustrating the flow of messages between network nodes when establishing a call connection over an IP network using existing procedures.
  • the MGC 21 To establish an IP bearer in a so-called "delayed backward setup" sequence, the MGC 21 must obtain the IP address from the originating MG-1 22 and forward it to the terminating MG-2 23. Thus, the MGC sends an Add message 24 to the originating MG-1, which returns an AddReply message 25 to the MGC with the IP address of MG-1. The MGC then sends an Add message 26 to the terminating MG-2. MG-2 then seizes an IP interface and sends information about the interface to the MGC in an AddReply message 27. The MGC then forwards the information about the IP interface to the originating MG-1 in a Modify message 28.
  • MG-1 then seizes an IP interface, and sends information about the interface to the MGC in a ModifyReply message 29.
  • the MGC then forwards the information about the IP interface to the terminating MG-2 in a Modify message 30.
  • MG-2 returns a Modify message 31 to the MGC.
  • the present invention provides a connection method and a Media Gateway Controller (MGC) that overcome the problem of the prior art by reducing the number of signaling messages required to establish the connection.
  • MGC Media Gateway Controller
  • the present invention is directed to a method of establishing a connection between an originating MG (MG- 1) and a terminating MG (MG-2) over an IP network.
  • the MGC obtains and stores the IP addresses for all of the MGs in the MGC's domain prior to initiating the establishment of the connection.
  • the MGC receives a call access request message from a user requesting that a connection be established between the originating MG-1 and the terminating MG-2.
  • the MGC initiates the establishment of the connection by sending a first connection setup message to the terminating MG-2 without contacting the originating MG-1 to obtain the originating MG-l's IP address.
  • the first setup message includes the originating MG-1 IP address that was stored in the MGC.
  • the MGC obtains the IP address of MG-2, obtains information regarding IP interfaces seized by MG-1 and MG-2 for the connection, and provides the IP addresses and IP interface information to both MG-1 and MG-2 for establishment of the connection.
  • the present invention is directed to a method of establishing a connection between an originating MG-1 and a terminating MG-2 over an IP network.
  • the method includes the steps of obtaining and storing by a MGC, the IP addresses for all of the MGs in the MGC's domain; receiving in the MGC, a call access request message from a user requesting that a connection be established between MG-1 and MG-2; and sending a first connection setup message from the MGC to MG-2 without contacting MG-1 to obtain MG-l's IP address.
  • the first setup message includes MG-l's IP address that was stored in the MGC.
  • the method also includes receiving in the MGC, a first reply message from MG-2 that includes an IP address for MG-2 and identifies an IP interface seized by MG-2 for the connection; sending a second connection setup message from the MGC to MG-1 that includes MG-2's IP address; and receiving in the MGC, a second reply message from MG-1 that identifies an IP interface seized by MG-1 for the connection.
  • the method also includes sending a third connection setup message from the MGC to MG-2 informing MG- 2 of the IP interface seized by MG-1 for the connection; and establishing the connection between MG-1 and MG-2 using the identified IP interfaces and the IP addresses sent to each MG.
  • the present invention is directed to a telephony server for establishing a connection between an originating MG-1 and a terminating MG-2 over an IP network.
  • the telephony server includes a memory for storing the IP addresses for all of the MGs in the telephony server's domain; signaling means for receiving a call access request message from a user; and connection establishment means connected to the memory and the signaling means.
  • the connection establishment means is adapted to provide the stored IP address of MG-1 to MG-2; obtain an IP address from MG-2; provide the obtained IP address of MG-2 to MG-1; request MG-1 and MG-2 to seize IP interfaces for the connection; obtain information regarding the IP interfaces seized by MG-1 and MG-2; and provide the IP interface information to both MG-1 and MG-2 for establishment of the connection.
  • FIG. 1 is a simplified block diagram of an existing network architecture for providing connections between Media Gateways (MGs) through either an IP network or an ATM network;
  • FIG. 2 is a signaling diagram illustrating the flow of messages between network nodes when establishing a call connection over an IP network using existing procedures;
  • FIG. 3 is a signaling diagram illustrating the flow of messages between network nodes when the MGC obtains and stores IP addresses for the MGs in its domain;
  • FIG. 4 is a signaling diagram illustrating the flow of messages between network nodes when establishing a call connection over an IP network in accordance with the teachings of the present invention.
  • the MGC obtains the IP addresses for all of the MGs in its domain prior to receiving a request for a call connection.
  • the IP addresses may be obtained when each MG first connects to the MGC, or when the first connection is going to be established.
  • FIG. 3 is a signaling diagram illustrating the flow of messages between network nodes when the MGC obtains and stores IP addresses for the MGs in its domain.
  • the MGC 21 sends an Add message 33 to the originating MG-1 22, requesting MG-l's IP address. This may be done by requesting MG-1 to seize an ephemeral IP bearer.
  • MG-1 returns an Add/Reply message 34 to the MGC with the IP address of MG-1.
  • the ephemeral bearer is then released.
  • the MGC stores the IP address of MG-1.
  • the MGC then sends an Add message 36 to the terminating MG- 2 23 requesting MG-2's IP address. Again, this may be done by requesting MG-2 to seize an ephemeral IP bearer.
  • MG-2 returns an Add/Reply message 37 to the MGC with the IP address of MG-2, and the ephemeral IP bearer is then released.
  • the MGC stores the IP address of MG-2.
  • FIG. 4 is a signaling diagram illustrating the flow of messages between network nodes when establishing a call connection over an IP network in accordance with the teachings of the present invention. Since the MGC 21 has previously stored the IP address of the originating MG-1 22, the sequence begins when the MGC sends an Add message 41 to the terminating MG-2.
  • MG-2 then seizes an IP interface and sends information about the interface to the MGC in an AddReply message 42.
  • the MGC then forwards the information about the IP interface to the originating MG-1 in an Add message 43.
  • MG-1 then seizes an IP interface, and sends information about the interface to the MGC in an AddReply message 44.
  • the MGC then forwards the information about the IP interface to the terminating MG-2 in a Modify message 45.
  • MG-2 returns a Modify message 46 to the MGC, and the connection is established.

Abstract

L'invention concerne un procédé de connexion et un contrôleur de passerelle multimédia (MGC) réduisant le nombre de messages de signalisation nécessaires pour établir une connexion IP entre une MG-1 de départ et une MG-2 de destination sur un réseau IP. Le MGC obtient et stocke les adresses IP pour toutes les MGs dans le domaine MGC avant d'initialiser l'établissement de la connexion. Lorsqu'une demande d'accès d'appel est ensuite reçue par le MGC, celui-ci établit une connexion en envoyant un message d'ajout H.248 à la MG-2 sans contacter la MG-1 pour obtenir l'adresse IP de la MG-1. Le MGC envoie l'adresse IP de la MG-1stockée dans le MGC. Le MGC obtient ensuite l'adresse IP de la MG-2, obtient des informations concernant les interfaces IP associées à la MG-1 et à la MG-2 pour la connexion, et transmet les adresses IP et les informations d'interface IP à la MG-1 et à la MG-2 pour établir la connexion.
PCT/IB2004/000413 2004-02-18 2004-02-18 Installation optimisee de connexions de passerelles multimedia intra-domaines WO2005088933A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2004/000413 WO2005088933A1 (fr) 2004-02-18 2004-02-18 Installation optimisee de connexions de passerelles multimedia intra-domaines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2004/000413 WO2005088933A1 (fr) 2004-02-18 2004-02-18 Installation optimisee de connexions de passerelles multimedia intra-domaines

Publications (1)

Publication Number Publication Date
WO2005088933A1 true WO2005088933A1 (fr) 2005-09-22

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PCT/IB2004/000413 WO2005088933A1 (fr) 2004-02-18 2004-02-18 Installation optimisee de connexions de passerelles multimedia intra-domaines

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009086663A1 (fr) * 2007-12-29 2009-07-16 Zte Corporation Procédé pour l'obtention d'informations d'appel par une passerelle de conversion de média

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002082794A2 (fr) * 2001-04-03 2002-10-17 Voxpath Networks, Inc. Systeme et procede de telephonie ip

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002082794A2 (fr) * 2001-04-03 2002-10-17 Voxpath Networks, Inc. Systeme et procede de telephonie ip

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009086663A1 (fr) * 2007-12-29 2009-07-16 Zte Corporation Procédé pour l'obtention d'informations d'appel par une passerelle de conversion de média

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