CN101257516A - Method for correcting source address - Google Patents
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- CN101257516A CN101257516A CNA2008100849747A CN200810084974A CN101257516A CN 101257516 A CN101257516 A CN 101257516A CN A2008100849747 A CNA2008100849747 A CN A2008100849747A CN 200810084974 A CN200810084974 A CN 200810084974A CN 101257516 A CN101257516 A CN 101257516A
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Abstract
The invention discloses a source address correcting method comprising following steps that: after receiving a SCCP information, a signaling connection and control part (SCCP) reads the source address and destination address in the SCCP information, and determines and corrects critical information according to the destination address; according to the built mappings hypotaxis between the corrective critical information and the source address corrective strategy, the SCCP obtains the source address corrective strategy mapped to the determined corrective critical information and finishes the correction to the source address. This invention, being capable of adapting to present new demands and aiming to the condition of variable modes of telecommunication networks among meshwork devices and variable addressing modes, makes the SCCP realize the processing and correcting to the source address.
Description
Technical field
The present invention relates to the source address correction technique, relate in particular to the method for SCCP in a kind of No.7 signalling system (SCCP, Signaling Connect and Control Part) source address correction.
Background technology
In existing No.7 signalling system, SCCP only needs to carry out route selecting according to destination address, and does not process usually for source address, directly transparent transmission.For instance, as shown in Figure 1, Fig. 1 is existing telecommunications networking schematic diagram based on the SCCP stack.Comprise source signaling side 1, signal switching end 2, purpose signaling side 3 among Fig. 1.And the level framework of SCCP stack comprises first upper layer application 11, a SCCP12, a MTP313, a MTP214 and a MTP115 in the source signaling side 1; The level framework of SCCP stack comprises the 2nd SCCP22, the 2nd MTP3 23, the 2nd MTP2 24 and the 2nd MTP1 25 in the signal switching end 2; Purpose signaling side 3 comprises the 3rd upper layer application 31, Three S's CCP32, the 3rd MTP3 33, the 3rd MTP234 and the 3rd MTP135.Here, MTP3 is the abbreviation of Message Transfer Part Level 3, refers to the 3rd level of Message Transfer Part; Similarly, MTP2 refers to the 2nd grade of Message Transfer Part, and MTP1 refers to the 1st grade of Message Transfer Part.
Here, be example with the level framework of the SCCP stack of source signaling side 1, set forth the function of each layer in the SCCP stack level framework.First upper layer application 11 refers to each user on a SCCP12 upper strata, is used for finishing separately application function based on the routing function of SCCP signaling message and other functions.The one SCCP12 is mainly used in destination address and the source address that reads the SCCP signaling message, the routing iinformation of Query Database carries out global title (GT, Global Title) translation, and purpose signaling side network element device address that will be routed to after will translating and destination address information as composite key, are come Query Database such as routing mode.The one SCCP12 also is used for the routing iinformation that returns according to database, by a MTP3 13/ MTP2 14/ MTP1 15 the SCCP signaling message route of receiving is gone out again.The one SCCP12 also is used for other relevant functions of SCCP.The one MTP3 13/ MTP2 14/ MTP1 15 is used for receiving the SCCP signaling message from other ends such as the purpose signaling side, and is forwarded to a SCCP12 of local terminal.The one MTP3 13/ MTP2 14/ MTP1 15 also is used for the SCCP signaling message is routed to the network element device of purpose signaling side, realizes the reliable delivery of SCCP signaling message.
So, SCCP according to the detailed process that destination address carries out route selecting is: the SCCP signaling message of at first receiving first upper layer application 11 at source signaling side 1, the one SCCP12.And comprise destination address and source address in this SCCP signaling message, source address is represented the address of this signaling side, uses when being used for SCCP signaling message echo reply.Then, the one SCCP12 carries out the GT translation according to the destination address in this SCCP signaling message and chooses route, carry out the transmission of SCCP signaling message by a MTP3 13, and be forwarded to purpose signaling side 3 or directly send to purpose signaling side 3 via signal switching end 2, and a SCCP12 is to the direct transparent transmission of source address in this SCCP signaling message.When needs are transmitted the SCCP signaling message via signal switching end 2, at signal switching end 2, the 2nd SCCP22 up receive this SCCP signaling message that a MTP313 sends after, similarly, also be to carry out the GT translation according to destination address to choose route, be forwarded to other network element devices by the 2nd MTP3 23 again, such as purpose signaling side 3.And the 2nd SCCP22 is for the also direct transparent transmission of source address.Behind the transmission arrival purpose signaling side 3 of SCCP signaling message via the 3rd MTP3 33, Three S's CCP32 sends a message to the 3rd upper layer application 31, the 3rd upper layer application 31 can be the source address of receiving the SCCP signaling message as destination address afterwards, produce and respond the SCCP signaling message and turn back to Three S's CCP32, be routed to source signaling side 1 by Three S's CCP32.
Along with enriching constantly of telecommunication service, the telecommunications group net mode between the network element device becomes more complicated.The desired SCCP addressing system of different network elements equipment has nothing in common with each other, the network element device that has requires destination signaling point sign indicating number (DPC, Destination Point Code) in conjunction with Sub-System Number (SSN, Subsystem Number) addressing system, the network element device that has requires the GT addressing system, the network element device that requires the GT addressing system that has in addition require different GT represent the language.And, after the SCCP signaling message that the network element device of source signaling side sends arrives the network element device of purpose signaling side, the network element device of purpose signaling side can be the source address in this SCCP signaling message as destination address as response to this SCCP signaling message, the network element device that requires the source signaling side is so handled the source address in this SCCP signaling message that sends, and fills in addressing different mode or GT to the network element device of different purpose signaling sides and represents the source address of speaking.Yet, the upper layer application of source signaling side network element device is when issuing this SCCP signaling message to SCCP, if destination address is the GT route, upper layer application does not possess the GT interpretative function of SCCP, can't distinguish is which network element device this SCCP signaling message is routed to, also just the source address of filling in which kind of type can't be distinguished, a fixing source address can only be filled in so.
Below, the application scenarios that connects a plurality of mobile switching centres (MSC, Mobile Services Switching Center) with attaching position register (HLR, Home Location Register) is an example, describes and adopts the existing in prior technology shortcoming.
As shown in Figure 2, Fig. 2 calls out the schematic diagram of mobile subscriber's handling process for adopting the prior art fixed network user, and this handling process may further comprise the steps:
Here, the source address in this PRN message fixedly extends this as the address of GT route.
After step 104, MSC1/VLR1 receive PRN message, distribute roaming number, and the source address in the PRN message as destination address, return response message to HLR, and MSRN returned to HLR at PRN message.
Here, it is pointed out that working as HLR sends PRN message to the MSC2/VLR2 at the current place of called subscriber, the step in handling process and the above Fig. 2 handling process is similar, comprises step 201～step 206.Different is, is different from step 103, and in step 203, HLR sends PRN message to the MSC2/VLR2 at the current place of called subscriber, and only needs in Fig. 2 handling process, and the MSC1/VLR1 in step 103 subsequent step changes MSC2/VLR2 into and gets final product.So, if it is the GT routing addressing that MSC1/VLR1 requires the address of HLR, and MSC2/VLR2 requires the address of HLR is that DPC is in conjunction with the SSN routing addressing, then as can be known based on the description of Fig. 2 handling process, in step 103, HLR fixedly fills in the addressing that source address is the GT route, and the MSC/VLR at called subscriber place is MSC1/VLR1.When carrying out step 104, MSC1/VLR1 does destination address to source address so, can correctly handle.In step 203, the VLR at called subscriber place is MSC2/VLR2, and HLR still fixedly fills in the addressing that source address is the GT route, and when carrying out in step 204, MSC2/VLR2 does destination address to source address so.But because this moment, requirement was the addressing of DPC in conjunction with the SSN route, then the GT translation failure causes can't returning to HLR at the response message of PRN message.As seen, only need to carry out route selecting according to destination address because prior art is SCCP, and do not process usually for source address, and to the direct transparent transmission of source address, then the source address received of the network element device of purpose signaling side is exactly the source address of fixing.If source address is the addressing of GT route, and the destination device requirement is the addressing of DPC in conjunction with the SSN route, must respond response message so.
In sum, prior art is, based on the telecommunications group net mode between the present network element device, adopt single GT route addressing mode, SCCP only need carry out route selecting according to destination address, and does not process for source address, and current new demand is, telecommunications group net mode and addressing system between the network element device are versatile and flexible, need SCCP that source address is handled.Obviously, adopt prior art can't adapt to current new demand.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of source address correction, can adapt to current new demand, at the flexile situation of telecommunications group net mode and addressing system between the network element device, make the processing of SCCP realization, and source address is revised source address.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of source address correction, this method may further comprise the steps:
After A, SCCP SCCP receive the SCCP signaling message, read source address and destination address in the SCCP signaling message, determine to revise key message according to described destination address;
B, according to the correction key message of setting up and the mapping relations of source address correction strategy, SCCP obtains the source address modification strategy that mapping relations are arranged with described definite correction key message, finishes the correction to source address.
Wherein, in the steps A, when the addressing system that encapsulates in the described destination address is the addressing of global title GT route, described destination address is carried out the GT translation, the described correction key message of determining is: the purpose signaling side network element device address that obtains after the GT translation;
Perhaps, at least a information in the destination address information of GT translation back;
Perhaps, by the network element device address of GT translation back purpose signaling side and the combination that at least a information constituted in the destination address information of GT translation back.
Wherein, in the steps A,, determine that described correction key message is: the DPC in the described destination address when the addressing system that encapsulates in the described destination address when being destination signaling point sign indicating number DPC in conjunction with the addressing of Sub-System Number SSN route;
Perhaps, by the combination that at least a information constituted in described DPC and the destination address information.
Wherein, described destination address information comprises: routing mode, SSN, GT type, Translation Type, numbering plan, address character and GT sign indicating number.
The present invention realizes at the SCCP layer of existing SCCP stack level framework, makes the processing of SCCP realization to source address at the SCCP layer, and source address is revised.Specifically, at first set up the mapping relations of revising key message and source address correction strategy, and store in the database.Here, when the addressing system that encapsulates in the destination address is the addressing of GT route, revise the combination that key message can be translated at least a information in the destination address information of back for the network element device address and the GT of GT translation back purpose signaling side.Like this, SCCP is after the GT translation, just can be with the combination of at least a information in the network element device address of translation back purpose signaling side and the translation back destination address information as revising key message, search the mapping relations of having set up in the database, obtain corresponding source address correction strategy, finish correction source address.
Improvements over the prior art of the present invention concentrate on the SCCP layer, can carry out compatibility with prior art, make at the network element device of source signaling side or the network element device of signal switching end the correction of source address is easy to realize.And employing the present invention, can adapt to current new demand, at the flexile situation of telecommunications group net mode and addressing system between the network element device, make the processing of SCCP realization, and source address is revised source address.Thereby realized that SCCP is provided with different source addresses according to different network element devices, to adapt to the different SCCP addressing system of each network element device.
Description of drawings
Fig. 1 is existing telecommunications networking schematic diagram based on the SCCP stack;
Fig. 2 calls out the schematic diagram of mobile subscriber's handling process for adopting the prior art fixed network user;
Fig. 3 is the realization flow schematic diagram of the inventive method principle.
Embodiment
Core concept of the present invention is: the present invention at first sets up the mapping relations of revising key message and source address correction strategy, and stores in the database.Here, when the addressing system that encapsulates in the destination address is the addressing of GT route, revise the combination that key message can be translated at least a information in the destination address information of back for the network element device address and the GT of GT translation back purpose signaling side.Like this, SCCP is after the GT translation, just can be with the combination of at least a information in the network element device address of translation back purpose signaling side and the translation back destination address information as revising key message, search the mapping relations of having set up in the database, obtain corresponding source address correction strategy, finish correction source address.
Be described in further detail below in conjunction with the enforcement of accompanying drawing technical scheme.
As shown in Figure 3, a kind of method of source address correction, this method may further comprise the steps:
The mapping relations of key message and source address correction strategy are revised in step 301, foundation.
Here, revise key message and can be purpose signaling side network element device address; What perhaps, the correction key message can be formed by at least a information in purpose signaling side network element device address and the destination address information constitutes.Wherein, destination address information comprises: routing mode, SSN, GT type, Translation Type, numbering plan, address character and GT sign indicating number.Here, routing mode comprises routing mode and the GT routing mode of DPC in conjunction with SSN.The GT type comprises GT1, GT2, GT3 and GT4.So, for instance, revising key message can be by a kind of information in purpose signaling side network element device address and the destination address information such as constituting that routing mode forms, and just revises key message and be purpose signaling side network element device address and combination that routing mode constituted.Revising key message can be by two kinds of information in purpose signaling side network element device address and the destination address information such as constituting that routing mode and Translation Type form, and just revises key message and be to be purpose signaling side network element device address, the combination that routing mode and Translation Type constituted.
And it is pointed out that when the addressing system that encapsulates in the destination address is the addressing of GT route, revise key message and can be the network element device address of the purpose signaling side that obtains after the GT translation; Perhaps revising key message can be by the network element device address of GT translation back purpose signaling side and the combination that at least a information constituted in the destination address information of GT translation back.
Here, source address information also comprises: routing mode, SSN, GT type, Translation Type, numbering plan, address character and GT sign indicating number.Here, routing mode comprises routing mode and the GT routing mode of DPC in conjunction with SSN.The GT type comprises GT1, GT2, GT3 and GT4.The source address correction strategy can be the new value of each information in the source address information so.It also can be the new value of partial information.So, at setting up the mapping relations of revising key message and source address correction strategy, form correction chart according to mapping relations and be kept in the database.In correction chart, the mode that the source address correction strategy is set is specially: increase the correction option of each information in correction chart, according to the new value that should revise option and each information in the source address correction strategy, source address is revised.Revise the information that does not have setting in the option for this, then keep original value, do not revise; For the information that is provided with in this correction option, the corresponding information of then revising in the source address information is new value.
Here, at setting up the mapping relations of revising key message and source address correction strategy, form correction chart according to mapping relations and be kept in the database.So, in order to realize according to the partial information in the destination address information better or only to choose the source address correction strategy as revising key message, can in correction chart, increase the setting of destination address information match options again according to purpose signaling side network element device address.Such as whether mating routing mode, whether mate the GT type, whether mate Translation Type, whether mate numbering plan, whether match address character disposes SSN, so that configuration data is more flexible.Like this, according to the retrieval of correction key message the time, only need match options according to the destination address information that is provided with.
Step 302, SCCP receive the SCCP signaling message of sending from upper layer application, or after receiving the SCCP signaling message from MTP3, read source address and destination address in the SCCP signaling message, determine to revise key message according to destination address.
In the step 302, according to the difference of the addressing system that encapsulates in the destination address, definite correction key message is also different.Comprise two kinds of situations.
First kind of situation, when the addressing system that encapsulates in the destination address is the addressing of GT route, destination address carried out GT translation after, determine that revising key message is: the purpose signaling side network element device address that obtains after the GT translation.Perhaps, determine that revising key message is: at least a information in the destination address information of GT translation back.Perhaps, determine that revising key message is: by the network element device address of GT translation back purpose signaling side and the combination that at least a information constituted in the destination address information of GT translation back.
Second kind of situation when the addressing system that encapsulates in the destination address when being DPC in conjunction with the addressing of SSN route, do not carried out the GT translation to destination address, determines to revise key message and is: the DPC in the destination address.Perhaps, determining to revise key message is: by the combination that at least a information constituted in DPC and the destination address information.
Step 303, according to the correction key message of setting up and the mapping relations of source address correction strategy, SCCP obtains the source address modification strategy that mapping relations are arranged with definite correction key message, finishes the correction to source address.
Here it is to be noted, the SCCP layer that method of the present invention is not only applicable to the Home Network element device is at the source signaling side or in the situation of signal switching end, also be applicable to the relevant treatment of signaling connection control part customer message adaptation layer (SUA, Signalling Connection Control Part User Adaptation Layer).Just be adapted to the network element device of all SCCP/SUA protocol stacks.
Method embodiment one, current destination address information comprise routing mode, and the combination that employing purpose signaling side network element device address and routing mode are constituted is as revising key message, and the source address correction strategy is for revising routing mode and GT type.
Step 401, set up the mapping relations of this correction key message and source address correction strategy, form correction chart and be kept in the database.
After step 402, SCCP receive the SCCP signaling message that need carry out route, read source address and destination address in the SCCP signaling message,, then follow-uply do not carry out the source address correction, take the prior art flow processing if source address does not exist; Otherwise, execution in step 403.
If the addressing system that encapsulates in step 403 destination address is the addressing of GT route, then carry out the GT translation, obtain the network element device address of GT translation back purpose signaling side and the routing mode after the GT translation, and the network element device address of GT translation back purpose signaling side and the combination of the routing mode after the GT translation be defined as revising key message, execution in step 404 afterwards; If the addressing system that encapsulates in the destination address is the addressing of DPC in conjunction with the SSN route, then do not carry out the GT translation, directly obtain DPC in the former destination address as the network element device address of purpose signaling side, determine the routing mode of DPC in conjunction with the SSN route, and the network element device address of purpose signaling side and the combination of routing mode be defined as revising key message, execution in step 404 afterwards.
The correction key message that step 404, basis are determined, inquiry is revised the source address correction strategy of key message corresponding to this in database.
If step 405 does not get access to the source address strategy, then do not carry out the source address correction, take prior art the SCCP signaling message to be routed to the network element device of purpose signaling side; If got access to the source address correction strategy, after then the routing mode of source address and GT type being revised, the SCCP signaling message is routed to the network element device of purpose signaling side according to the source address strategy that obtains.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (4)
1, a kind of method of source address correction is characterized in that, this method may further comprise the steps:
After A, SCCP SCCP receive the SCCP signaling message, read source address and destination address in the SCCP signaling message, determine to revise key message according to described destination address;
B, according to the correction key message of setting up and the mapping relations of source address correction strategy, SCCP obtains the source address modification strategy that mapping relations are arranged with described definite correction key message, finishes the correction to source address.
2, method according to claim 1, it is characterized in that, in the steps A, when the addressing system that encapsulates in the described destination address is the addressing of global title GT route, described destination address is carried out the GT translation, and the described correction key message of determining is: the purpose signaling side network element device address that obtains after the GT translation;
Perhaps, at least a information in the destination address information of GT translation back;
Perhaps, by the network element device address of GT translation back purpose signaling side and the combination that at least a information constituted in the destination address information of GT translation back.
3, method according to claim 1, it is characterized in that, in the steps A,, determine that described correction key message is: the DPC in the described destination address when the addressing system that encapsulates in the described destination address when being destination signaling point sign indicating number DPC in conjunction with the addressing of Sub-System Number SSN route;
Perhaps, by the combination that at least a information constituted in described DPC and the destination address information.
4, according to claim 2 or 3 described methods, it is characterized in that described destination address information comprises: routing mode, SSN, GT type, Translation Type, numbering plan, address character and GT sign indicating number.
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| CN110442603A (en) * | 2019-07-03 | 2019-11-12 | 平安科技（深圳）有限公司 | Address matching method, apparatus, computer equipment and storage medium |
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| CN101102554B (en) * | 2007-08-10 | 2012-01-11 | 中兴通讯股份有限公司 | Signaling forward device and method for signaling connection controller in No. 7 signaling system |
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| CN110442603A (en) * | 2019-07-03 | 2019-11-12 | 平安科技（深圳）有限公司 | Address matching method, apparatus, computer equipment and storage medium |
| CN110442603B (en) * | 2019-07-03 | 2024-01-19 | 平安科技（深圳）有限公司 | Address matching method, device, computer equipment and storage medium |
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