CN101098317A - Media gateway system - Google Patents

Abstract

The invention discloses a media network gate system, comprising a central media network gate MGW, and at least one remote media network gate MGW, wherein the central MGW controls each remote MGW to exchange service data and concentrated maintains and manages remote MGW, the remote MGW is connected with the central MGW to process local data and accept the control and concentrated maintenance and management of the central MGW. The invention realizes cascade structure of MGW.

Description

A kind of media gateway system

Technical field

The present invention relates to networking technology area, be meant a kind of media gateway (MGW) especially.

Background technology

NGN is the integrated network architecture that miscellaneous services such as speech, data, video and multimedia can be provided, and it adopts the packet switched data network IP network is core network, and core network is by media gateway (MGW) and other network interworkings.MGW is the interface of other network insertion IP network, is responsible for the conversion of Media Stream such as agreement and data between core IP network and the access network.Media Gateway Controller (MGC) provide controlled function such as call establishment, switching.MGW receives the MGCP that MGC sends, and finishes Media Stream and changes between other networks such as TDM network and IP network.

At present, the MGW structure comprises Time Division Multiplexing interface module, IP interface module, media conversion module, gateway control module and maintenance management module as shown in Figure 1.Wherein, the TDM interface module provides MGW interface to TDM network such as public switched telephone network (PSTN).The IP interface module provides MGW to arrive the interface of IP network.Media conversion module is used for finishing Media Stream and is carried to format conversion between the IP carrying at TDM.The gateway control module receives handles the MGCP that MGC sends over, and goes to control the format conversion that TDM interface module, media conversion module and IP interface module are finished Media Stream.The maintenance management module, the user manages and safeguards above-described each module by this module.

At present, MGW is arranged in the NGN core IP network, because the restriction of subscribers feeder inserts the problem that IP network exists geographical aspect for the equipment under the far-end office point by MGW.Present a kind of solution is that MGW equipment is based upon each far-end Ju Dianchu, but because each MGW is a stand-alone network elements, in the network operation, the maintenance management of the MGW under each far-end office point needs independently to carry out respectively, makes that the cost of maintenance management is higher.

Another kind of solution is to use access network equipment or remote subscriber frame, user under the far-end office point is converged, by existing transmission network, the MGW to core network handles with whole business data transmission, is finished the exchange of whole speech channels and multi-medium data by MGW again.But speech channel between all local users under the far-end office point and business datum also have to handle to central MGW by remote transmission, therefore cause MGW very high to the load of far-end office point this section network, make transmission cost higher.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of MGW system, makes its far-end that can load unloading, can realize centralized management again, solves the connectivity problem of far-end office point and core network, and then reduction management cost and transmission cost.

Media gateway MGW of the present invention system comprises a central MGW and one or more far-end MGW, wherein,

Central MGW comprises: center gateway control module, link to each other with central TDM interface module, center media modular converter and center IP interface module, be used for the TDM of control centre interface module, center media modular converter and center IP interface module, and far-end time division multiplexing tdm interface module and the remote TDM Switching Module of control far-end MGW; The central inner protocol conversion module, link to each other with central TDM interface module with center gateway control module, be used for the MGW control protocol that center gateway control module is sent to far-end MGW is converted to the form of central TDM interface module identification, send to far-end MGW by central TDM interface module, TDM transmission network; Central TDM interface module is used to provide the interface of central MGW to the TDM network; Center IP interface module is used to provide the interface of central MGW to the external IP network; The center media modular converter links to each other with center IP interface module with central TDM interface module, is used for realizing the format conversion of Media Stream between TDM interface module and IP interface module;

Each far-end MGW comprises: the remote TDM interface module is used to provide the interface of far-end MGW to the TDM network; The remote TDM Switching Module links to each other with the remote TDM interface module, is used for handling speech channel and the business datum between the user under the far-end MGW that receives by the remote TDM interface module; Far-end internal agreement modular converter, link to each other with the remote TDM interface module, be used for receiving the MGW control protocol that the central MGW of coming from the TDM Network Transmission sends by the remote TDM interface module, and the remote TDM interface module and the remote TDM Switching Module that link to each other with far-end internal agreement modular converter by the MGW control protocol control that receives.

Wherein, described far-end MGW further comprises remote maintenance administration agent module, is used for each module of described far-end MGW is connected, and carries out maintenance management.

Also comprise remote gateways control agent module, link to each other with the remote TDM Switching Module, be used for controlling remote TDM interface module and remote TDM Switching Module with the remote TDM interface module; And link to each other with far-end internal agreement modular converter, receive control protocol from central MGW.

Wherein, described central MGW further comprises the central service administration module, is used for each module of described central MGW and far-end MGW is connected, and carries out maintenance management.

Wherein, described central TDM interface module or remote TDM interface module comprise trunk interface and user interface.Described user interface further comprises plain old telephone service POTS interface, integrated services network isdn interface and ADSL (Asymmetric Digital Subscriber Line) adsl interface.

Wherein, described MGW control protocol comprises network management protocol, gateway control protocol and signaling.

By said method as can be seen, MGW provided by the invention comprises central MGW and far-end MGW, central MGW is connected by existing transmission network with far-end MGW, central MGW has realized maintenance management that each far-end MGW that is connected is concentrated, and do not need each far-end MGW to carry out independent maintenance management separately, therefore reduced the network operation management cost.Realized the cascade structure of MGW, MGW has been expanded.Simultaneously because far-end MGW self has the ability of exchange certainly of business datum, so not needing to converge to central MGW, speech channel between the local user of office point, far-end MGW place and business datum do not exchange, realize the unloading nearby of load, saved transfer resource, reduced transmission cost.

Description of drawings

Fig. 1 is the schematic diagram of MGW under the prior art;

Fig. 2 is the schematic diagram of MGW of the present invention system;

Fig. 3 comprises the schematic diagram of the MGW system of remote agent's module for the present invention.

Embodiment

MGW of the present invention system is made up of two parts, comprises a central MGW and one or more far-end MGW.Central MGW is controlled each far-end MGW and is carried out the business datum exchange, and far-end MGW is carried out the centralized maintenance management; Far-end MGW mainly is responsible for the exchange of the business datum between the local user under the far-end office point, place, realizes the unloading nearby of load.Below be elaborated referring to Fig. 2.

As shown in Figure 2, central MGW comprises central service administration module, center gateway control module, central inner protocol conversion module, central TDM interface module, center IP interface module and center media modular converter.

Wherein, the central service administration module is except original function described in the background technology, be used for also each module of each far-end MGW is managed and safeguards that the dotted line among Fig. 2 represents that the central service administration module can set up being connected in logic with these modules, thereby manages and safeguard.The central inner protocol conversion module, be used for realizing the conversion of MGW control protocol such as network management protocol, gateway control protocol, thereby make the management maintenance agreement of central service administration module of central MGW be passed through each module that the TDM carrying is transferred to far-end MGW to the TDM network format.Center gateway control module is except original function described in the background technology, also be used for remote TDM interface module and the remote TDM Switching Module of each far-end MGW are controlled, wherein, the agreement of center gateway control module such as signaling etc., also be carried to the TDM network, pass to each far-end MGW through central TDM interface module by the central inner protocol conversion module.Central TDM interface module, center IP interface module are identical with the function of corresponding module described in the background technology with the center media modular converter.

Far-end MGW comprises remote TDM interface module, remote TDM Switching Module and far-end internal agreement modular converter.

Wherein, the remote TDM interface module provides far-end MGW interface to PSTN network or other TDM networks.The remote TDM Switching Module is mainly used to realize under the far-end MGW speech channel between the local user and the exchange of business datum under the office point.Remote TDM interface module and remote TDM Switching Module are controlled by the center gateway control module of central MGW, control it and realize professional exchange, and carry out maintenance management by the central service administration module of central MGW.Far-end internal agreement modular converter is identical with the central inner protocol conversion module function of central MGW, is used for being carried on the TDM transmission network after the conversion of the control protocol of far-end MGW, realizes carrying out the mutual of control protocol with central MGW.

In addition, as shown in Figure 3, far-end MGW also can comprise remote maintenance administration agent module and remote gateways control agent module, is used for place far-end MGW is carried out maintenance management and control.When having maintenance management proxy module and gate control proxy module, corresponding former center module can be realized by these two proxy modules respectively maintenance management and the gateway control of far-end MGW, these two proxy modules are controlled by the central service administration module and the center gateway control module of central MGW respectively, after central MGW and far-end MGW connected, central service administration module and center gateway control module were controlled remote maintenance administration agent module and remote gateways control agent module respectively.On behalf of the maintenance management proxy module, dotted line can set up logic with these modules to be connected and to carry out maintenance management.

The TDM interface module of central MGW and each far-end MGW all uses the transport network interface of standard to insert transmission network, couple together by existing transmission network between central MGW and the far-end MGW, the realization central MGW is connected with far-end MGW's, so central MGW can be positioned at different geographical position with far-end MGW.

The remote TDM interface module provides each class interface to the user, for example plain old telephone service (POTS) interface, integrated services network (ISDN) interface, the wide narrow-band user interface of ADSL (Asymmetric Digital Subscriber Line) (ADSL) interface; And the trunk interface of PSTN side, as using the repeat circuit interface of common road or channel associated signalling, the user selects required interface according to actual conditions.When carrying out the business datum exchange between the local user under the far-end office point, far-end MGW is finished the speech channel between the local user of office point, place or the exchange of business datum by the remote TDM Switching Module of far-end MGW under the center of central MGW gateway control module control.

With reference to Fig. 2, be that example describes in detail with the calling between the local user under the far-end MGW office point.When the user under the far-end MGW office point initiates local call, path at first by setting up between far-end MGW and the central MGW, be that remote TDM interface module-TDM transmission network-central TDM interface module-central inner protocol conversion module-center this path of gateway control module carries out the mutual of signaling, central MGW and far-end MGW continue for this user by transmitting signaling control remote TDM Switching Module, set up the connection of the service channel between the local user, this connection of setting up then by far-end MGW, realize the transmission of business datum between the local user, speech channel between the local network user and business datum do not need to converge to central MGW.Wherein, the user side of remote TDM interface module is the connection of setting up down by the control of remote TDM crosspoint with being connected of TDM transmission network side.

When carrying out speech channel or business data transmission between the user under belonging to different far-end MGW office point, after connecting by signaling, business transferring data between far-end MGW and the central MGW, business datum is delivered to central MGW by far-end MGW through the TDM transmission network, and under the control of central MGW, become the IP data to send on the IP network data transaction, carry out the transmission of follow-up IP based network.

With reference to Fig. 2, with the user under the far-end MGW office point make a call, transfer of data is that example describes to IP network.When the user makes a call to the user under another far-end MGW under the far-end MGW, path at first by setting up between far-end MGW and central MGW, it is remote TDM interface module-TDM transmission network-central TDM interface module-central inner protocol conversion module-center this path of gateway control module, far-end MGW sends to central MGW with signaling, under the control of center gateway control module, set up service channel, as the connection of setting up center IP interface module-center media modular converter-central TDM interface module-TDM transmission network-remote TDM interface module, by the service channel of this user place TDM network to IP core network, user's business datum is sent to IP core network, carry out follow-up business data transmission.Wherein, the user side of remote TDM interface module is the connection of setting up down by the control of remote TDM crosspoint with being connected of TDM transmission network side.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1, a kind of media gateway system is characterized in that, comprises a center media gateway MGW and one or more distant end media gateways MGW, wherein,

Central MGW is carried out the business datum exchange and far-end MGW is carried out the centralized maintenance management in order to control each far-end MGW;

Far-end MGW links to each other with described central MGW, in order to the processing local data, and the control of acceptor center MGW and centralized maintenance management.

2, media gateway system according to claim 1 is characterized in that, described central MGW comprises:

Center gateway control module links to each other with central TDM interface module, center media modular converter and center IP interface module, is used for control centre's time division multiplexing tdm interface module, center media modular converter and center IP interface module;

The central inner protocol conversion module, link to each other with central TDM interface module with center gateway control module, be used for the MGW control protocol that center gateway control module is sent to far-end MGW is converted to the form of central TDM interface module identification, send to far-end MGW by central TDM interface module, TDM transmission network;

Central TDM interface module is used to provide the interface of central MGW to outside described TDM network;

Center IP interface module is used to provide the interface of central MGW to the external IP network;

The center media modular converter links to each other with center IP interface module with central TDM interface module, is used for realizing the format conversion of Media Stream between TDM interface module and IP interface module.

3, media gateway system according to claim 2 is characterized in that, described MGW control protocol comprises network management protocol, gateway control protocol and signaling.

4, media gateway system according to claim 2 is characterized in that, described central MGW further comprises the central service administration module, is used for each module of described central MGW and far-end MGW is connected, and carries out maintenance management.

5, media gateway system according to claim 2 is characterized in that, described central TDM, interface module comprise trunk interface or user interface.

6, media gateway system according to claim 2 is characterized in that, described far-end MGW comprises:

The remote TDM interface module is accepted the control of described center gateway control module, is used to provide the interface of far-end MGW to the TDM network;

The remote TDM Switching Module links to each other with the remote TDM interface module, accepts the control of described center gateway control module, is used for handling under the far-end MGW that receives by the remote TDM interface module speech channel and business datum between the user;

Far-end internal agreement modular converter, link to each other with the remote TDM interface module, be used for receiving the MGW control protocol that the central MGW of coming from the TDM Network Transmission sends by the remote TDM interface module, and the remote TDM interface module and the remote TDM Switching Module that link to each other with far-end internal agreement modular converter by the MGW control protocol control that receives.

7, media gateway system according to claim 6 is characterized in that, described remote TDM interface module comprises trunk interface or user interface.

According to claim 5 or 7 described media gateway systems, it is characterized in that 8, described user interface further comprises plain old telephone service POTS interface, integrated services network isdn interface and ADSL (Asymmetric Digital Subscriber Line) adsl interface.

9, media gateway system according to claim 6 is characterized in that, described far-end MGW further comprises remote maintenance administration agent module, is used for connecting with each module of described far-end MGW, carries out maintenance management.

10, media gateway system according to claim 6, it is characterized in that, described far-end MGW further comprises remote gateways control agent module, links to each other with the remote TDM Switching Module with the remote TDM interface module, is used for controlling remote TDM interface module and remote TDM Switching Module; And link to each other with far-end internal agreement modular converter, receive control protocol from central MGW.

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