CN101257522B - Method for realizing H.248 protocol interface compatibility - Google Patents
Method for realizing H.248 protocol interface compatibility Download PDFInfo
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- CN101257522B CN101257522B CN2008100847934A CN200810084793A CN101257522B CN 101257522 B CN101257522 B CN 101257522B CN 2008100847934 A CN2008100847934 A CN 2008100847934A CN 200810084793 A CN200810084793 A CN 200810084793A CN 101257522 B CN101257522 B CN 101257522B
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Abstract
The invention relates to a method for realization H.248 protocol interfaces compatibility, comprising that: a media gateway controller (12) maintains version capability information list of media gateway (11) and the corresponding hypotaxis list of the media gateway version information; when operating business, the media controller judges whether the selected media gateway supports the business or not based on the inquiry to the hypotaxis list, and determines whether to continue the business process or not when the selected media gateway does not support the business. With this method, the media gateway controller entirely controls the capability information of a specific media gateway, and is capable of accurately controlling whether the specific business process can omit a parameter or a capability or not, and efficiently solves the problem of H.248 protocol interfaces compatibility between the media gateway controller and the media gateway.
Description
Technical field
The present invention relates to the next generation network communication system field, be specifically related to a kind of H.248 method of protocol interface compatibility that realizes.
Background technology
Along with communication system in the increasingly extensive application of every field such as economic and social life, communication system technology itself is also among fast development.
Present industry well recognized, next generation network Next Generation Network is called for short NGN, will be the network that control and carrying are separated.No matter be the upgrading of current fixed network; Or increasingly mature perfect third generation mobile system; Its essential characteristic is that the device separates with traditional control and call packing is Media Gateway Controller Media Gateway Controller, is called for short MGC and WMG Media Gateway, two parts of abbreviation MGW; MGC wherein accomplishes the control to MGW, carries out the realization of basic call and new business.
The Telecommunication StandardizationInternational Sector of ITU of international telecommunication union telecommunication standardization; Be called for short ITU-T in the H.248 agreement of its formulation; Defined the system and method for a cover MGC control MGW, present H.248 agreement is widely applied to the core net of systems such as WCDMA WCDMA, code division multiple access CDMA2000, time-division synchronous code division multiple access TD-SCDMA and soft switch SoftSwitch.Continuous popularization in-depth along with communication system technology and application; Also in continuous development, type of service constantly increases as the H.248 agreement of one of core protocol, and protocol contents is on the increase; Range of application constantly enlarges; Be difficult to again in short time reach unified, the thing followed is the problem that interconnects between different vendor's equipment, and different vendor's equipment has aggravated this problem especially for the degree of support difference of agreement.
To this problem, H.248 proposed MGC on the agreement and obtained the bag ability of the current support of MGW through the method for audit, after the actual tenability that obtains MGW, MGC does not send unsupported functional packet to evade the intercommunication problem to MGW.But during realizing for reality, this mode has comparatively obvious defects: obtain its ability that shows that MGW supported protocol bag ability can not complete and accurate through audit measure; For the support of protocol package content integrity and respective extension, for specifically describing symbol parameter, Session Description Protocol Session Description Protocol, abbreviation SDP parameter etc. can not accomplish accurately to obtain.
Chinese invention patent " a kind of H.248 method of information compatibility that realizes ", number of patent application 200710111792.X, publication number CN101098340A discloses a kind of method of ignoring the unidentified functional packet of MGC through MGW and has realized the H.248 compatibility of message.But whether MGW can not accurately control operation flow as controlled device and come decision business to continue in this method.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of H.248 method of protocol interface compatibility that realizes, use this method and can effectively solve and adopt H.248 the devices interconnect intercommunication and the compatibility issue of agreement.
Above-mentioned technical problem of the present invention solves like this, and a kind of H.248 method of protocol interface compatibility that realizes is provided, and may further comprise the steps:
1.1) set up and safeguard the version capability set information table of WMG and the mapping table of WMG and WMG version information in advance;
1.2) during service operation, Media Gateway Controller judges according to the version capability set information table of the said WMG of WMG capability query of the version information of the WMG of current selection and this service needed whether selected WMG is supported should business;
1.3) when supporting, continuation should business; When not supporting, Media Gateway Controller continues to select the next WMG in the said version capability set information table, repeating said steps 1.2).
According to implementation method provided by the invention, there is network to be connected between said WMG and said Media Gateway Controller, by said Media Gateway Controller management.
According to implementation method provided by the invention, said step 1.1) described in the version capability set information table of WMG each WMG version the WMG capability set tabulation with its coupling is all arranged.
According to implementation method provided by the invention, said WMG capability set tabulation comprises: bag, descriptor, Session Description Protocol, four list items of order.
According to implementation method provided by the invention; Said step 1.1) WMG version information described in is obtained when receiving said media gateway registration by said Media Gateway Controller, is perhaps disposed by the mode of said Media Gateway Controller through static configuration.
According to implementation method provided by the invention, said step 1.2) also comprise: the mapping table that said Media Gateway Controller is inquired about said WMG and WMG version information obtains the version information of the WMG of current selection.
According to implementation method provided by the invention, it is mobile exchange emulation MSC e, the mobile switching center server MSC Server of WCDMA WCDMA system or the controlling call entity under the next generation network NGN framework of existing third generation code division multiple access CDMA2000 system that said Media Gateway Controller includes, but are not limited to.
According to implementation method provided by the invention, said WMG is the WMG of existing CDMA2000 system, the WMG of WCDMA system or other medium veil units under the NGN framework.
According to implementation method provided by the invention, said step 1.3) also comprise afterwards: when final selected WMG does not support that actual motion is professional, should business whether continue by said Media Gateway Controller decision-making.
According to implementation method provided by the invention, when said Media Gateway Controller decision business can not continue, winding-up flow process then.
According to implementation method provided by the invention, when said Media Gateway Controller decision business still can continue, then said Media Gateway Controller issued and does not issue unsupported bag of final selected WMG and parameter when H.248 message is to said WMG.
A kind of H.248 method of protocol interface compatibility that realizes provided by the invention; Through capability set information at Media Gateway Controller specific definition WMG; Realization is for the control fully of concrete WMG ability information; Media Gateway Controller through self effectively control realize complete compatibility to WMG, solved between Media Gateway Controller and WMG the H.248 problem of information compatibility property effectively; Further, decision-making power is controlled by MGC, and MGC can accurately confirm whether concrete business can ignore certain parameter from the source, certain ability, thus make more accurate control.
Description of drawings
Further the present invention is elaborated below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is a media gateway registration schematic flow sheet of the present invention.
Fig. 2 is the H.248 protocol interface compatibility of the method for the invention schematic flow sheet of giving an example.
Embodiment
Main thought of the present invention is: decision-making power is controlled by MGC, and MGC can accurately confirm whether concrete business can ignore certain parameter, certain ability from the source, thereby makes more accurate control.
Through to discovering of agreement H.248; Can effectively divide protocol capability; Thereby can realize the fully control of Media Gateway Controller through the mode of on Media Gateway Controller, safeguarding the competence set of different WMGs for concrete WMG ability information; Realize that each WMG all has self corresponding competence set on Media Gateway Controller, Media Gateway Controller is effectively controlled the complete compatibility that realizes to WMG through self.In order to solve the WMG back problem brought of capacity variation that switches, can indicate the capability set tabulation of self supporting through the protocol subset parameter (ServiceChangeProfile) or the static configuration WMG version information that carry when the media gateway registration.
The present invention realizes that H.248 the method for protocol interface compatibility may further comprise the steps:
Step 1, on MGC, safeguard WMG version capability set information in advance, accomplish that each MGW version all has the capability set tabulation that is complementary with it, abilities such as the bag that configuration MGW supports, parameter, SDP;
The MGW ability can be through four aspects: bag, descriptor, SDP, order define; Can adopt hierarchical definition, for example, each aspect adopts 4 grades of ID to define, and is respectively ID1, ID2, ID3, ID4:
| The MGW version information | ?ID1 | ID2 | ID3 | ID4 |
ID1: one-level ID comprises: bag ID, descriptor, capable, the order of SDP.
ID2: secondary ID comprises: the descriptor of the Item of bag, descriptor parameters, the capable attribute of SDP, order.
ID3, three grades of ID comprise: the parameter of bag Item, the value of descriptor parameters, the parameter of the capable attribute of SDP.
ID4, level Four ID comprises: the values of parameters of bag Item, the values of parameters of the capable attribute of SDP.
The definition of the detailed ability of MGW can be adopted said method but be not limited to said method.
Step 2, Media Gateway Controller are confirmed the version information of respective media gateway: Media Gateway Controller is set up the mapping table of concrete WMG and WMG version information in the receiving media gateway registration.Except obtaining the version information of WMG through registration, Media Gateway Controller can also dispose the version information of WMG through the mode of static configuration.
When step 3, Media Gateway Controller need realize that certain is professional, first-selection was inquired about WMG and WMG version information mapping table, obtained the version information of current media gateway.The WMG version capability set information of describing in the WMG capability query step 1 according to WMG version information and this service needed then confirms whether selected WMG supports this business.
Step 4, do not support that when selected WMG in the step 3 should business the time, Media Gateway Controller continues to select next WMG, repeating step three optimizes and supports this professional WMG.
When final selected WMG did not support that this is professional, whether Media Gateway Controller should business continue according to concrete professional situation decision-making, if can not continue, then operation flow finishes; When this business of Media Gateway Controller decision-making can continue, Media Gateway Controller did not issue unsupported bag of selected gateway and parameter etc. when issuing H.248 message.
Media Gateway Controller can be the mobile switching center emulation MSCe of existing CDMA2000 system among the present invention, but is not limited to the CDMA2000 system, can be other controlling call entities under the NGN framework.
WMG can be the MGW of existing CDMA2000 system among the present invention, but is not limited to the CDMA2000 system, can be other medium veil units under the NGN framework.
Comprise following relation table in the implementation method of the present invention: safeguard a WMG version capability set information table on the Media Gateway Controller; Safeguard a concrete WMG and concrete WMG version information incidence relation table on the Media Gateway Controller; The version information of configuration medium gateway to report on the WMG.
Below in conjunction with accompanying drawing the present invention is done further detailed description
Media gateway registration flow process signal of the present invention is as shown in Figure 1, may further comprise the steps:
Step 101, WMG 11 send login request message to Media Gateway Controller 12, and WMG is at the capability set List name of when Media Gateway Controller is registered, supporting through optional parameters notice Media Gateway Controller self;
Step 102, WMG 11 succeed in registration, and Media Gateway Controller 12 returns response.
H.248 the give an example flow process signal of the protocol interface compatibility of the method for the invention is as shown in Figure 2, may further comprise the steps:
Step 201, Media Gateway Controller are initiated a certain business, suppose to be named as professional A;
Step 202, Media Gateway Controller confirm that professional A needs the localpeer parameter of WMG support circuit-switched packet (threegcsd bag);
Step 203, Media Gateway Controller are inquired about the gateway capability list according to the version information of WMG, confirm whether WMG supports the localpeer parameter of threegcsd bag;
Step 204, Media Gateway Controller judge whether WMG supports the localpeer parameter of threegcsd bag;
If step 205 WMG is supported the localpeer parameter of threegcsd bag, professional A success, the Media Gateway Controller initiation is mutual with WMG;
If step 206 WMG is not supported the localpeer parameter of threegcsd bag, Media Gateway Controller judges whether to continue to select next that the WMG of annexation is arranged, and the words that are continue repeating step 203 and select next WMG;
If the final selected WMG of step 207 is not supported the localpeer parameter of threegcsd bag, Media Gateway Controller judges whether professional A continues when lacking this ability;
If step 208 Media Gateway Controller judges professional A and can continue, WMG issues and H.248 instructs WMG, but does not carry the unsupported parameter of WMG, does not carry the localpeer parameter of threegcsd bag;
Professional A can not continue if step 209 Media Gateway Controller is judged the localpeer parameter of not supporting the threegcsd bag, then operation flow failure.
Certainly, the present invention also can have other various embodiments, and specific embodiment described herein is only in order to explaining the present invention, and is not used in qualification the present invention.
Claims (10)
1. realize the H.248 method of protocol interface compatibility for one kind, it is characterized in that, may further comprise the steps:
1.1) on Media Gateway Controller (12), set up and safeguard the version capability set information table of WMG (11) and the mapping table of WMG and WMG version information in advance;
1.2) during service operation, Media Gateway Controller (12) judges according to the said version capability set of the WMG capability query information table of the version information of the WMG of current selection and this service needed whether this WMG is supported should business;
1.3) when supporting, continuation should business; When not supporting, Media Gateway Controller (12) continues to select the next WMG in the said version capability set information table, repeating said steps 1.2).
2. according to the said implementation method of claim 1, it is characterized in that having network to be connected between said WMG (11) and said Media Gateway Controller (12), managed by said Media Gateway Controller (12).
3. according to the said implementation method of claim 1, it is characterized in that said step 1.1) described in the version capability set information table each WMG version the WMG capability set tabulation with its coupling is all arranged.
4. according to the said implementation method of claim 3, it is characterized in that said WMG capability set list entry comprises: bag, descriptor, Session Description Protocol or order.
5. according to the said implementation method of claim 1; It is characterized in that; Said step 1.1) WMG version information described in is obtained when receiving said WMG (11) registration by said Media Gateway Controller (12), is perhaps disposed by the mode of said Media Gateway Controller (12) through static configuration.
6. according to the said implementation method of claim 1, it is characterized in that said step 1.2) also comprise: the said mapping table of said Media Gateway Controller (12) inquiry obtains the version information of the WMG of said current selection.
7. according to the said implementation method of claim 1, it is characterized in that said Media Gateway Controller (12) is the mobile exchange emulation of CDMA2000 system, the Mobile Switching Center Server of WCDMA system or the controlling call entity under the NGN framework; Said WMG (11) is the WMG of CDMA2000 system, the WMG or the unit of the medium veil under the NGN framework of WCDMA system.
8. according to the said implementation method of claim 1, it is characterized in that said step 1.3) also comprise afterwards: when final selected WMG does not support that actual motion is professional, should business whether continue by said Media Gateway Controller (12) decision-making.
9. said according to Claim 8 implementation method is characterized in that, when said Media Gateway Controller (12) decision business can not continue, and winding-up flow process then.
10. said according to Claim 8 implementation method; It is characterized in that; When said Media Gateway Controller (12) decision business still can continue, then said Media Gateway Controller issued and does not issue unsupported bag of final selected WMG and parameter when H.248 message is to said WMG.
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| CN2008100847934A CN101257522B (en) | 2008-03-21 | 2008-03-21 | Method for realizing H.248 protocol interface compatibility |
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| CN2008100847934A CN101257522B (en) | 2008-03-21 | 2008-03-21 | Method for realizing H.248 protocol interface compatibility |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030028095A (en) * | 2001-09-27 | 2003-04-08 | 엘지전자 주식회사 | MEGACO Version Management Method Between The Media Gateway And Media Gateway Controller |
| CN1558694A (en) * | 2004-01-14 | 2004-12-29 | 得实信息科技(北京)有限公司 | Method for implementing international roaming of prepaid subscriber between two isomeric networks |
| CN1855914A (en) * | 2005-04-19 | 2006-11-01 | 中兴通讯股份有限公司 | Method for media gateway controller obtaining ability |
| CN1874349A (en) * | 2006-03-09 | 2006-12-06 | 华为技术有限公司 | Method for implementing internal connection in media gateway |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030028095A (en) * | 2001-09-27 | 2003-04-08 | 엘지전자 주식회사 | MEGACO Version Management Method Between The Media Gateway And Media Gateway Controller |
| CN1558694A (en) * | 2004-01-14 | 2004-12-29 | 得实信息科技(北京)有限公司 | Method for implementing international roaming of prepaid subscriber between two isomeric networks |
| CN1855914A (en) * | 2005-04-19 | 2006-11-01 | 中兴通讯股份有限公司 | Method for media gateway controller obtaining ability |
| CN1874349A (en) * | 2006-03-09 | 2006-12-06 | 华为技术有限公司 | Method for implementing internal connection in media gateway |
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