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Media gateway device

A media gateway and media conversion technology, which is applied in data exchange networks, digital transmission systems, electrical components, etc., and can solve problems such as resource occupation and line congestion.

Inactive Publication Date: 2012-05-30
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In the conventional media gateway device, as described above, when requesting to select a line other than the line controlled by the MGCF that made the connection request from the CS network, or when encountering a line obstacle with the other party's CS network, line congestion, or its own When resources are occupied, etc., there is a problem that the corresponding call processing is treated as a call loss.

Method used

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Experimental program
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no. 1 Embodiment approach

[0057] In the first embodiment, a master MGCF (for example, 22-0) is determined in advance as an MGCF that makes a control request to all the VXSMs 32-1 to 32-n of all the MGXs 31-1 to 31-2 in the user plane 30. The child MGCFs 22-1 and 22-2 other than the parent MGCF control the control plane 20 and request line control to the parent MGCF 22-0.

[0058] Figure 4 An operation explanatory diagram showing the first embodiment of the media gateway device of the present invention.

[0059] Step S1: the session initiation message (INVITE) that is sent from IP network 11 and arrives at CS network 12 is distributed to MGCF 22-1 decided by the round-robin scheduling mode for example by distributing part 21, and is converted into connection request message (IAM here) ), sent to SGCS 24. Here, an example in which the child MGCF 22 - 1 is first selected by the allocating unit 21 is shown.

[0060] Step S2: The IAM response message (IAA) sent back from the CS network 12 passes through...

no. 2 Embodiment approach

[0067] In the second embodiment, the same MGCF management data is stored in all MGCFs 22-0 to 22-2. The MGCF management data stores data identifying which MGCF controls which CS network-side line, and each MGCF determines the MGCF that is controlling the line sent back through the IAM response message (IAA) according to the MGCF management data, and performs Line control request.

[0068] Figure 7 An operation explanatory diagram showing the second embodiment of the media gateway device of the present invention.

[0069] Step S11: The session initiation message (INVITE) sent from the IP network 11 and received by the CS network 12 is distributed by the distributing section 21 to, for example, the MGCF 22-0 determined according to the sending station (OPC) in the above message, and here It is converted into an connection request message (IAM) and sent to the SGCS 24 . Here, an example in which MGCF 22-0 is selected is shown.

[0070] Step S12: The IAM response message (IAA...

no. 3 Embodiment approach

[0079] In the third embodiment, the allocation unit 23 returns an IAM response message (IAA) to the MGCF controlling the line specified from the CS network 12 .

[0080] Figure 10 An operation explanatory diagram showing the third embodiment of the media gateway device of the present invention.

[0081]Step S21: The session start message (INVITE) sent from the IP network 11 and received by the CS network 12 is distributed by the distribution unit 21 to, for example, the MGCF 22-0 determined based on the sending station (OPC) in the above message, and converted there Sent to the SGCS 24 as an Attach Request Message (IAM). Here, an example in which MGCF 22-0 is selected is shown.

[0082] Step S22: The IAM response message (IAA) sent back from the CS network 12 is received by the distribution unit 23 via the SGCS 24 .

[0083] Step S23: The distribution part 23 analyzes the IAM response message (IAA) and reads the line information (OPC, VPCI, VCI), and utilizes OPC and VCI t...

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PUM

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Abstract

A media gateway device having a plurality of call control means for performing the call control between the Internet network and the public network and a plurality of interconnection means for performing the line connection and media exchange of the user data between the Internet network and the public network and performing the interconnection between the Internet network and the public network.The media gateway device sets a specific call control means for performing the line connection control of the plurality of interconnection means and has a plurality of call control means except the specific call control means for requesting the line connection control of the plurality of interconnection means to the specific call control means. The specific call control means has a management data storage means for storing management data for identifying which interconnection means of the plurality of interconnection means control which line of the public network. Each of the plurality of call control means except the specific call control means has a control requesting means for requesting the line connection control of the plurality of interconnection means to the specific call control means.

Description

technical field [0001] The present invention relates to a media gateway device, and relates to a media gateway device for interconnection between the Internet and a public network. Background technique [0002] In a gateway device disposed between a CS network (public network) such as an ATM network or an STM network, and an IP (Internet) network, when a connection is made in the direction of sending from the IP network and receiving through the CS network, the media gateway The device exchanges information for line selection for the user plane (U-Plane) with the CS network switch. [0003] At this time, when the line selection right is on the side of the CS network switch, the media gateway device implements the user plane line connection using the line instructed from the CS network switch. [0004] figure 1 Indicates the timing of line selection. In this figure, the media gateway device (MGW) sends an connection request message (IAM) to the CS network switch. [0005]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56
CPCH04L29/06244H04L65/103H04L65/1043H04L65/104H04L65/1069
Inventor 高桥清人大津和之粟窪康成水谷当良松冈晴喜内山诚一郎
Owner FUJITSU LTD