CN1300507A - Method for signaling in a signaling transfer point - Google Patents
Method for signaling in a signaling transfer point Download PDFInfo
- Publication number
- CN1300507A CN1300507A CN 99806124 CN99806124A CN1300507A CN 1300507 A CN1300507 A CN 1300507A CN 99806124 CN99806124 CN 99806124 CN 99806124 A CN99806124 A CN 99806124A CN 1300507 A CN1300507 A CN 1300507A
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- Prior art keywords
- loop
- signalling
- link group
- target
- point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0025—Provisions for signalling
Abstract
Routing loops may occur in signaling networks so that messages are routed to a destination in a loop without ever reaching said destination. The invention shows how such loops can be detected and eliminated as speedily as possible.
Description
Following situation may take place in the described signaling network of Signaling System 7(SS-7), promptly because wrong plan or faulty operation the route ring will occur for the 3rd layer at the MTP of network, like this, biography is to the message of the one or more targets loop of just can flowing through, and can not arrive its target sometimes.At this, interested especially is length greater than 2 loop (" length of loop " means the number that adds signalling point in loop), and especially when these loops were identified, they can be eliminated.
If certain the time really the loop in the form has been used as route, represent that then there is serious problem in this network, it is former because on the one hand message can not arrive target, is to consume important Internet resources on the other hand.Thereby need get rid of this situation as early as possible.
In the agreement of operate as normal, can not produce length in the MTP (MTP=Message Transfer Part) and be 2 loop (yet being so-called table tennis loop).If this situation still occurs, so by the following method, this loop in the Signalling Transfer Point is easy to just can be identified in real time, that is: whether check message can pass by the same link group that receives this message again.Equally, can more easily proofread and correct them, method is exactly to repeat the agreement behavior of this failure (switching is forbidden-TFP-message send to opposite side).
Length is difficult to identification greater than 2 loop ratio.But for each message, can be in a certain definite STP this message of check whether just derive from this STP (comparing) by OPC contained in this message and the sensing sign indicating number (PointCode) of STP.If this is the case, just illustrate and have loop in the network.But STP not necessarily produces message, or not necessarily message is sent to the one or more targets that constitute loop.
This problem can solve by a kind of real-time method, for example discerns the possibility that loop exists according to the continuous over loading of link group.If identifying, described method may have loop, just can the notifying operation personnel, allow them introduce corrective action.
The another kind of solution of this problem be standard (Q.753, Q.754) the so-called MTP route of definition is proofreaied and correct test (MRVT), this test might be tested by path to the institute in the MTP network between two set points, comprises the correctness of loop free with check.If break down, for example there is loop, just the notifying operation personnel introduce correction.But, comparing with real-time method, MRVT has an advantage, that is: owing to having checked the possible path of the institute that comprises current path, so it can identify these loops before real use loop.Yet individual shortcoming is also arranged, need oneself a agreement exactly.If this agreement does not realize in whole network that then described check just can not realize, or can only realize by halves.This situation is listed in the international signaling net specially.In addition, according to the load of its generation, MRVT is discontinuous to the check of all paths between having a few in the network.
Therefore, task of the present invention is for overcoming above-mentioned shortcoming.
This task realizes by the described method of claim 1.
Further set forth the present invention by accompanying drawing below, comprising 3 width of cloth accompanying drawings.
Fig. 1 shows an example of loop.
Fig. 2 and 3 shows the method for open-loop.
The present invention has illustrated especially when discerning length greater than 2 loop in real time, with and/or by MRVT identification loop the time, how with automatically, in real time, protocol-compliant and the method that is easy to realize come open-loop.Can eliminate this fault time by operating personnel thus, up to taking effective measures.
It is to be noted herein, by link group being taked in the possible loop that MRVT or real-time method discern, can preferably before may taking automatic corrective action, test and (also be, MRVT does not provide the conclusion about " whether also using the possibility loop at present ", and where necessary, real-time method also can not made the conclusion about " lead to which target and have the possibility loop ").Described check is realized by following method, promptly other no MTP network management messages is sent to the target that can pass through relevant link group (according to route) at present and arrive.If these test posts turn back to STP, compare by sensing sign indicating number so OPC contained in this message and STP, just can find this message, and identify one or more loops.Can be restricted to corrective action on the at present used loop thus.
If described check realizes in single STP that just it is more favourable adopting test post so, reason is can discern the loop that all pass through this STP thus.This method of inspection also is effective always.
Another possibility is, may introduce corrective action by loop adopted (relevant) probability according to analyzing.This information can be provided with the priority form of the single path of forming loop by MRVT.
In STP A,, then can disconnect this loop by following process if utilize MRVT or real-time method to discern towards the loop of target X:
A) open-loop " downstream " by the following method promptly will be guided the particular path of this target into and be blocked in the routing table of A.If also have other available path to lead to X from A, then especially can carry out this step.In this case, preferably check selected path whether also to produce loop.Although lack the loop evidence, thereby can not illustrate and no longer have other loop that no longer comprises A, have a kind of possibility that overcomes this problem at least.
B) alternatively, or for example if do not have (loop-free) selection path again from A, so just can open-loop " upstream ", that is to say the STP B of open-loop front by the following method, soon send to B from A about the switching disable message of X.So B will change the direction that X is led in communication, or it is stopped.After this, the so-called route about X that A is mail in utilization is provided with test (Route-Set-Test) message, B will periodically check the availability through the path of A to X, so must guarantee that A need not " allow switching " and answer this message, reason is that B might include loop again under other situation.
After the route option table being carried out correction of a final proof by operating personnel, (note: OMAP comprises upper level SS7 management function can to cancel the action of being taked automatically by MTP or oam part (OMAP) again by operating personnel, as MRVT, function of shielding and measurement." giving operating personnel's photos and sending messages " also is the part of OMAP).
On mechanism, particularity of the present invention is, under the prerequisite of utilizing the existing protocol feature, comes uninterrupted length greater than 2 loop by the automatic measure of taking to be simple and easy to realize.If only realize in single STP, this method is particularly suited for using with favourable.
Also have a kind of options b that realizes) possibility, promptly for the message of delivering to X from B, in A, automatically activate so-called ILS/DPC shielding (ILS=input link group) (referring to Q.705, § 8).But this is in and is necessary to introduce as follows ILS/DPC shielding in the MTP network management, even handy TFP message is answered disable message, and route is provided with test post correctly handles.
Claims (9)
1. the Signalling method in the Signalling Transfer Point, in view of the above
-the signaling message that sent by Original Signaling Point is passed by the target signalling point through a direction,
-by route test (MRVT) and/or check by real-time method on the link group of vector signalling point (SP X) and whether have loop or the possibility that has loop is not arranged,
-under assay is sure situation, stops automatically and continue signaling message to be sent to target signalling point (SP X) by the relevant link group.
2. method according to claim 1,
It is characterized in that,
-under described assay is sure situation, at first test post is sent to through the accessible target of described link group by a link group,
If-test post returns, then stop automatically signaling message is sent to the target of returning test post.
3. method according to claim 1 and 2,
It is characterized in that,
(in the downstream) stops signaling message to send to related objective by relevant link group by the following method, and promptly in the routing table of Signalling Transfer Point, the link group of this target is guided in blocking-up especially into.
4. method according to claim 1 and 2,
It is characterized in that,
(in the upstream) stops signaling message to send to related objective by relevant link group by the following method, be that the Signalling Transfer Point (STP B) of Signalling Transfer Point (STP A) to the front sends the switching disable message about target signalling point (SP X), the Signalling Transfer Point of front (STP B) changes the direction that target signalling point (SP X) is led in communication thus, or it is stopped.
5. according to each described method in the claim 1 to 4,
It is characterized in that,
Described loop disconnects by oam part (OMAP) to be controlled.
6. according to each described method in the claim 1 to 5,
It is characterized in that,
Described loop disconnects to be controlled by Message Transfer Part (MTP).
7. according to each described method in the claim 1 to 6,
It is characterized in that,
In Signalling Transfer Point (STP A), after the contained link group of loop is blocked, immediately current new path is carried out the loop free check again.
8. the signaling system of Signalling Transfer Point, it
-signaling message is caused the target signalling point,
It is characterized in that,
-it is by route test (MRVT) and/or check by real-time method on the link group of vector signalling point (SP X) and whether have loop or the possibility that has loop is not arranged, wherein,
-when receiving sure assay, it automatically stops by the relevant link group signaling message is sent to related objective.
9. the signaling system of Signalling Transfer Point according to claim 8,
It is characterized in that,
Before the prevention continuation sent to target to signaling message by the relevant link group automatically, whether it was by sending to test post through the accessible target of described link group, returning according to described test post then and verify that there is possibility in determined loop.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP98108645.7 | 1998-05-12 | ||
| EP98108645 | 1998-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1300507A true CN1300507A (en) | 2001-06-20 |
Family
ID=8231919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99806124 Pending CN1300507A (en) | 1998-05-12 | 1999-05-04 | Method for signaling in a signaling transfer point |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1078536A1 (en) |
| CN (1) | CN1300507A (en) |
| CA (1) | CA2331706A1 (en) |
| WO (1) | WO1999059349A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012113257A1 (en) * | 2011-02-23 | 2012-08-30 | 华为技术有限公司 | A method and equipment for sccp loop detection processing |
| CN101155062B (en) * | 2006-09-30 | 2012-10-03 | 华为技术有限公司 | Method, device and system for settling exception of signaling network |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100579077C (en) * | 2007-03-22 | 2010-01-06 | 华为技术有限公司 | Routing method and system under double-signalling switching point and mutual supporting network element group network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5583848A (en) * | 1994-11-15 | 1996-12-10 | Telefonaktiebolaget L M Ericsson | Methods for verification of routing table information |
| US5553058A (en) * | 1995-07-10 | 1996-09-03 | Telefonaktiebolaget Lm Ericsson | Centralized load minimizing method for periodical routing verification tests scheduling |
| US5638357A (en) * | 1995-08-25 | 1997-06-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Distributed method for periodical routing verification test scheduling |
-
1999
- 1999-05-04 EP EP99920848A patent/EP1078536A1/en not_active Withdrawn
- 1999-05-04 WO PCT/EP1999/003048 patent/WO1999059349A1/en not_active Application Discontinuation
- 1999-05-04 CA CA002331706A patent/CA2331706A1/en not_active Abandoned
- 1999-05-04 CN CN 99806124 patent/CN1300507A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101155062B (en) * | 2006-09-30 | 2012-10-03 | 华为技术有限公司 | Method, device and system for settling exception of signaling network |
| WO2012113257A1 (en) * | 2011-02-23 | 2012-08-30 | 华为技术有限公司 | A method and equipment for sccp loop detection processing |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999059349A1 (en) | 1999-11-18 |
| EP1078536A1 (en) | 2001-02-28 |
| CA2331706A1 (en) | 1999-11-18 |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |