CN101193097B - A link state inquiry response method and its device - Google Patents
A link state inquiry response method and its device Download PDFInfo
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- CN101193097B CN101193097B CN2006101147545A CN200610114754A CN101193097B CN 101193097 B CN101193097 B CN 101193097B CN 2006101147545 A CN2006101147545 A CN 2006101147545A CN 200610114754 A CN200610114754 A CN 200610114754A CN 101193097 B CN101193097 B CN 101193097B
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Abstract
The invention discloses a link state query answering method and a device; wherein, the method comprises the steps that: Step 1, the M2UA protocol entity of the MGC receives the link state query audit message sent by the MTP3 protocol entity of the MGC and sends a link state query request message to the M2UA protocol entity of the SG; Step 2, the M2UA protocol entity of the MGC receives the link state query answering message that is sent by the M2UA protocol entity of the SG with an attached link state information and reports to the MTP3 protocol entity of the MGC a link state query audit answering message to which a specific link state information is attached . The adoption of the invention reduces the link state query answering interaction quantity between the signaling gateway SG and the media gateway controller MGC based on the M2UA protocol over the user adaptation layer of the second layer of the signaling transmission.
Description
Technical field
The present invention relates to IP network signaling transfer protocol (SIGTRAN), particularly a kind of M2UA link status poll answer method and device thereof.
Background technology
Along with the progressively maturation of IP (Internet Protocol, Internet protocol) network technology, the demand of circuit switching signaling protocols such as Signaling System Number 7 has appearred transmitting on IP network.In order to satisfy demand in IP network transmitting signaling agreement, IETF (Internet Engineering Task Force) the Internet engineering duty is formed the special signaling transmission group of having stood, and the IP network signaling transmission SIGTRAN (Signaling Transport agreement) that this group worked out is supported by IP network transmission legacy circuit-switched signaling.IETF engineering duty group had formally been issued MTP2-User Adaptation Layer agreement (MTP2User AdaptionLayer in 2002, M2UA), M2UA is used for being implemented between SGW SG (Signal Gateway) and the media gateway controller MGC (Media Gateway Controller) and carries out the message transmission.Its main application purpose is to realize the Message Transfer Part second layer (Message Transfer Part Level 2, MTP2) with Message Transfer Part the 3rd layer of (Message Transfer Part Level 3, MTP3) a kind of agreement of the data-message transparent transmission between.Basic application model as shown in Figure 1.
In the MGC side, the M2UA entity provides the interface of MTP3, and upper-layer user MTP3 data-message is converted to the M2UA entity that M2UA message sends to the SG side, will send to the MTP3 protocol entity for MTP primitive from the M2UA message transformation of SG side simultaneously.In the SG side, the M2UA entity provides the interface of MTP3, will become MTP primitive to send to the MTP2 protocol entity from the M2UA message conversion of MGC, will send to the M2UA entity of MGC side from traditional circuit domain MTP2 message conversion for M2UA message simultaneously.By the cooperation of MGC side and SG side M2UA entity, finish the mutual of traditional circuit domain MTP signaling message and IP territory MTP signaling message and transmit as shown in Figure 2.In traditional circuit domain signaling process flow process, MTP3 protocol entity and MTP2 protocol entity are to be present in the same network element, yet are present between SG and two network elements of MGC between the M2UA entity between MTP3 protocol entity and the MTP2 protocol entity.Link state inquiry message from the MTP3 protocol entity need be sent from the MGC network element, go up the M2UA entity through MGC again and be transmitted to upward M2UA entity of SG, then SG goes up the MTP2 protocol entity that the M2UA entity sends to this link state inquiry message circuit domain once more.Need arrive the MTP3 protocol entity of MGC equally from the Link State response message of circuit domain MTP2 protocol entity through the opposite direction of above-mentioned approach, need finish the link state inquiry response process by multiple messages when the status poll of M2UA entity return link is replied on SG in the unfortunately present prior art.Therefore in the process of link state inquiry, between SG and MGC network element, there is a large amount of interacting messages.In order to keep on the SG and the consistency of MGC uplink state, the link state inquiry process is generally regularly carried out simultaneously.In present technology,, can cause between SG and MGC, regularly existing a large amount of interaction messages because there are some defectives in M2UA link status poll answering.
As can be seen from Figure 2 in present M2UA, signaling link status poll audit message (step 201 for the initiation of MGC side MTP3 protocol entity, Audit) link state inquiry request (state audit) message (step 202, State Req (STATUS_AUDIT)) that at first is converted into the M2UA entity sends to the M2UA entity of SG side; The M2UA entity of SG side sends to link state inquiry request message (step 203, State Req) the MTP2 protocol entity of SG side again; For link state inquiry response message (step 204 from SG side MTP2 protocol entity, State Ack), the M2UA entity of SG side need be converted into the M2UA entity that different M2UA MAUP message sends to the MGC side according to different Link States.
Because SG goes up M2UA physical link state difference, the corresponding message interaction flow is also different in the prior art.
A), when the M2UA entity of SG found that link is in the service attitude, at first the M2UA entity to the MGC side sent link establishment acknowledge message (step 205, Establish Cfm); The M2UA entity of MGC side sends link service indication (step 206, In Serv Ind) to upper-layer user MTP3 after receiving the link establishment acknowledge message; Being in M2UA entity on the SG subsequently also can send a link state inquiry acknowledge message (state audit) (step 207, State Cfm (STATUS_AUDIT)) MGC link state inquiry message is confirmed; Last MGC go up the M2UA entity to upper strata user response link state inquiry response audit message (step 208, AuditCfm).
B), find link when the M2UA entity of SG and be in when withdrawing from the service attitude, at first send link and discharge Indication message to the M2UA entity of MGC side; The M2UA entity of MGC side is received after link discharges Indication message and is withdrawed from the service indication to upper-layer user MTP3 transmission link; Being in M2UA entity on the SG subsequently also can send a link state inquiry acknowledge message MGC link state inquiry message is confirmed; Last MGC goes up the M2UA entity to upper strata user response link state inquiry response Audit message.
C), when the M2UA entity of SG finds that link is in the service attitude and has congestion situation, at first set up acknowledge message to the M2UA entity transmission Link State of MGC, the M2UA entity of MGC sends link service indication to upper-layer user MTP3; M2UA entity on the SG can send congested (Congestion Ind) message to the M2UA entity of MGC subsequently, and the M2UA entity of MGC sends link congestion Indication message (Cong Ind) to upper-layer user MTP3; Last and link only is in serves the M2UA entity that attitude handles on the similar SG and still can send the link state inquiry acknowledge message, and the last M2UA entity of MGC still can be to upper strata user response link state inquiry response Audit message.
D), when the M2UA entity of SG found that link is in the service attitude and has processor stall, the interaction process flow process of message and link were in the service attitude and exist congested handling process similar.The difference of the two only is after sending the link establishment affirmation, the message difference of transmission.Link service and congested, the M2UA entity of SG can send the M2UA entity of congestion messages to MGC.Link service and processor stall, the M2UA entity of SG can sending processor failure indication information StateInd (EVENT_RPO_ENTER).
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of link state inquiry response method and device thereof, and a link state inquiry message that is used to solve MGC can cause replying the too frequent problem of bringing with acknowledge message of interacting message from two of SG or three state.
To achieve these goals, the invention provides a kind of link state inquiry response method, be used to reduce and measure alternately, it is characterized in that, comprising based on the SGW SG of signaling transmission second layer user adaptation layer M2UA, the link state inquiry response between the media gateway controller MGC:
Step 1, the M2UA entity of described MGC receive the link state inquiry audit message of the MTP3 protocol entity transmission of described MGC, and send a link state inquiry request message to the M2UA entity of described SG; And
Step 2, the M2UA entity of described MGC receives the link state inquiry response message with link-state information of the M2UA entity transmission of described SG, and reports a link state inquiry audit response message with concrete link-state information to the MTP3 of described MGC protocol entity.
Described link state inquiry response method, wherein, in the described step 2, described link-state information comprises one or more combination of following four kinds of state informations: link service state, link withdraw from service state, link congestion state, link processing machine malfunction.
Described link state inquiry response method, wherein, in the described step 2, described link state inquiry response message with link-state information comprises the various combination of different described link-state informations.
Described link state inquiry response method, wherein, in the described step 2, when link was in the service attitude and is in congested attitude, described link state inquiry response message with link-state information comprised link service state and concrete link congestion level.
Described link state inquiry response method, wherein, in the described step 2, when link was in the service attitude and is in the processor stall attitude, described link state inquiry response message with link-state information comprised link service state and concrete processor stall situation.
Described link state inquiry response method, wherein, in the described step 2, described link state inquiry response message with link-state information also comprises M2UA message or the M2UA message format increases, deletes, revises or it is in conjunction with the message after handling.
Described link state inquiry response method, wherein, in the described step 2, described definite according to the Link State of the M2UA entity of described SG with the sign of the Flag in the link state inquiry response message of link-state information.
Described link state inquiry response method, wherein,
When link is in the service attitude, this Flag sign value is the service attitude; Or
When link is in non-service attitude, this Flag sign value is non-service attitude; Or
Serve attitude and be in congested attitude when link is in, this Flag sign value is for the service attitude and indicate corresponding congestion level; Or
Serve attitude and be in the processor stall attitude when link is in, this Flag sign value is for the service attitude and indicate corresponding processor stall situation.
To achieve these goals, the present invention also provides a kind of link state inquiry response device, be used to reduce and measure alternately, it is characterized in that, comprising based on the SGW SG of signaling transmission second layer user adaptation layer M2UA, the link state inquiry response between the media gateway controller MGC:
One link state inquiry audit module is arranged at the MTP3 protocol entity of described MGC, is used for sending link state inquiry audit message to the M2UA entity of described MGC;
One link state inquiry request module is arranged at the M2UA entity of described MGC, is used for sending a link state inquiry request message to the M2UA entity of described SG;
One link state inquiry response module is arranged at the M2UA entity of described SG, is used for sending the link state inquiry response message with link-state information to the M2UA entity of described MGC; And
One link state inquiry audit responder module is arranged at the M2UA entity of described MGC, is used for reporting a link state inquiry audit response message with concrete link-state information to the MTP3 of described MGC protocol entity.
Described link state inquiry response device wherein, also comprises: a Link State request module, be arranged at the M2UA entity of described SG, and be used for sending a Link State request message to the MTP2 of described SG protocol entity.
Described link state inquiry response device wherein, also comprises: a Link State responder module, be arranged at the MTP2 protocol entity of described SG, and be used for responding a Link State response message to the M2UA entity of described SG.
The present invention compares with the existing protocol technology, the invention solves the status poll of M2UA physical link reply interacting message between SG and MGC network element too much, too frequent problem, it is replied flow process to relevant signaling link status poll in the M2UA related protocol and improves, when replying by responding the signaling link status poll in the SG side subsidiary link-state message will be originally two even three s' message in a piece of news, transmit and finish.Nearly can reduce half to 2/3rds message traffic for the link state inquiry response message between a large amount of SG and the MGC network element, significantly reduced network load flow between SG and the MGC, alleviate the Message Processing burden of SG, MGC network element internal simultaneously.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 is the protocol stack that prior art M2UA uses in SG/MGC;
Fig. 2 is about the process chart of link state inquiry AUDIT in the prior art M2UA;
Fig. 3 is the process chart of the M2UA link state inquiry AUDIT after the present invention improves;
Fig. 4 is the M2UA link state inquiry structure drawing of device after the present invention improves.
Embodiment
As shown in Figure 2, in the prior art M2UA about the process chart of link state inquiry AUDIT, these flow process concrete steps are as follows:
As shown in Figure 3, be the process chart of the M2UA link state inquiry AUDIT after the present invention's improvement, these flow process concrete steps are as follows:
Subsidiary necessary link-state information in this message, as: link service state, link withdraw from service state, link congestion state, link processing machine malfunction etc.; And
Comprising the link service in this message indicates (In Serv Ind), link to withdraw from service indication (Oos Ind), link congestion indication (Congest Ind), link processing machine faulty indication (PO Ind).
Above-mentioned steps 303,304 is not a steps necessary, can be provided with according to actual conditions.
Can reduce the link state inquiry response number of times by method shown in Figure 3, new link state inquiry response message comprises: to the combination of increase, deletion, modification and the variety of way of existing protocol message or protocol message form.
When the SG side is carried out link state inquiry response, attaching the corresponding link state.
When link was in service attitude and link and is in congested attitude, new link state inquiry response message can be attached link service state and concrete link-state informations such as link congestion level.
When link was in service attitude and link and is in the processor stall attitude, new link state inquiry response message can be attached link service state and concrete link-state informations such as processor stall situation.
By analysis chart 2 described prior aries, can find to cause having a large amount of interacting messages between SG and two network elements of MGC, as step 205-step 208 from the link state inquiry message of MGC; And, generally be second link state inquiry of level, so further cause between SG and two network elements of MGC, existing very many interaction messages because this link state inquiry message is very frequent.
Prior art shown in Figure 2, its bottleneck is that the link state inquiry message of MGC can cause replying and acknowledge message from two of SG or three state, the corresponding corrective measure that Fig. 3 proposes has solved this problem, to reply acknowledge message boil down to a piece of news from the Link State of SG transmits, thereby can reduce the interacting message between SG and the MGC to greatest extent, as step 305-step 306.
In above-mentioned steps 305, the improvement of prior art State Cfm message is not imposed any restrictions; Can adopt various technical schemes in concrete technology implementation, the embodiment of various different schemes is in protection scope of the present invention.For the improvement of State Cfm message, the present invention provides following a kind of embodiment example:
The form of State Cfm message is as follows in the prior art M2UA:
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tag (0x302) | Length＝8 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| State |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
State Cfm message format after the present invention improves is as follows:
0 1 2 3
0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1?2?3?4?5?6?7?8?9?0?1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tag (0x302) | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| State |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Flag |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
When the State value equaled 0x7 (STATUS_AUDIT), the Length value was unfixing, comprised the Flag sign in this StateCfm message.According to the difference of the last M2UA physical link state of SG, Flag sign value is also inequality.
When link is in the service attitude, Flag value service attitude;
When link is in non-service attitude, the non-service attitude of Flag value;
Serve attitude and congested attitude when link is in, the Flag value is served attitude and is indicated corresponding congestion level;
Serve attitude and processor stall attitude when link is in, the Flag value is served attitude and is indicated corresponding processor stall situation;
When the State value was not equal to 0x7 (STATUS_AUDIT), Length still got 8.Do not comprise the Flag sign in this StateCfm message.The processing of the handling process of message structure and message and present protocol in prior art is identical.
As Fig. 4, be the M2UA link state inquiry structure drawing of device after the present invention improves.This device is used to reduce based on the SGW SG of signaling transmission second layer user adaptation layer M2UA, the link state inquiry response between the media gateway controller MGC to be measured alternately, specifically comprises:
Link state inquiry audit module 401 is arranged at the MTP3 protocol entity of MGC, is used for sending link state inquiry audit message to the M2UA entity of MGC;
Link state inquiry request module 402 is arranged at the M2UA entity of MGC, is used for sending the link state inquiry request message to the M2UA entity of SG;
Link state inquiry response module 403 is arranged at the M2UA entity of SG, is used for M2UA entity to MGC and sends link state inquiry response message with link-state information; And
Link state inquiry audit responder module 404 is arranged at the M2UA entity of MGC, is used for reporting link state inquiry audit response message with concrete link-state information to the MTP3 of MGC protocol entity.
This device also comprises: Link State request module 405, be arranged at the M2UA entity of SG, and be used for sending the Link State request message to the MTP2 of SG protocol entity.
This device also comprises: Link State responder module 406, be arranged at the MTP2 protocol entity of SG, and be used for responding the Link State response message to the M2UA entity of SG.
Link-state information comprises: link service state, link withdraw from service state, link congestion level, link processing machine malfunction.
The invention solves in the status poll of M2UA physical link and reply the too many problem of interacting message between SG and MGC network element, it is replied flow process to relevant signaling link status poll in the M2UA related protocol and improves, when replying by responding the signaling link status poll in the SG side subsidiary link-state message will be originally two even three s' message in a piece of news, transmit and finish.
The present invention nearly can reduce half to 2/3rds message traffic for the link state inquiry response message between a large amount of SG and the MGC network element; Alleviated the Message Processing flow process of network load flow between SG and the MGC and SG, MGC network element internal greatly.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (11)
1. a link state inquiry response method is used to reduce based on the SGW SG of signaling transmission second layer user adaptation layer M2UA, the link state inquiry response between the media gateway controller MGC and measures alternately, it is characterized in that, comprising:
Step 1, the M2UA entity of described MGC receive the link state inquiry audit message of the MTP3 protocol entity transmission of described MGC, and send a link state inquiry request message to the M2UA entity of described SG; And
Step 2, the M2UA entity of described MGC receives the link state inquiry response message with link-state information of the M2UA entity transmission of described SG, and reports a link state inquiry audit response message with concrete link-state information to the MTP3 of described MGC protocol entity.
2. link state inquiry response method according to claim 1, it is characterized in that, in the described step 2, described link-state information comprises one or more combination of following four kinds of state informations: link service state, link withdraw from service state, link congestion state, link processing machine malfunction.
3. link state inquiry response method according to claim 2 is characterized in that, in the described step 2, described link state inquiry response message with link-state information comprises the various combination of different described link-state informations.
4. link state inquiry response method according to claim 3, it is characterized in that, in the described step 2, when link was in the service attitude and is in congested attitude, described link state inquiry response message with link-state information comprised link service state and concrete link congestion level.
5. link state inquiry response method according to claim 3, it is characterized in that, in the described step 2, when link was in the service attitude and is in the processor stall attitude, described link state inquiry response message with link-state information comprised link service state and concrete processor stall situation.
6. according to the arbitrary described link state inquiry response method of claim 3-5, it is characterized in that, in the described step 2, described link state inquiry response message with link-state information also comprises M2UA message or the M2UA message format increases, deletes, revises or it is in conjunction with the message after handling.
7. link state inquiry response method according to claim 6, it is characterized in that, in the described step 2, described definite according to the Link State of the M2UA entity of described SG with the sign of the Flag in the link state inquiry response message of link-state information.
8. link state inquiry response method according to claim 7 is characterized in that,
When link is in the service attitude, this Flag sign value is the service attitude; Or
When link is in non-service attitude, this Flag sign value is non-service attitude; Or
Serve attitude and be in congested attitude when link is in, this Flag sign value is for the service attitude and indicate corresponding congestion level; Or
Serve attitude and be in the processor stall attitude when link is in, this Flag sign value is for the service attitude and indicate corresponding processor stall situation.
9. a link state inquiry response device is used to reduce based on the SGW SG of signaling transmission second layer user adaptation layer M2UA, the link state inquiry response between the media gateway controller MGC and measures alternately, it is characterized in that, comprising:
One link state inquiry audit module is arranged at the MTP3 protocol entity of described MGC, is used for sending link state inquiry audit message to the M2UA entity of described MGC;
One link state inquiry request module is arranged at the M2UA entity of described MGC, is used for sending a link state inquiry request message to the M2UA entity of described SG;
One link state inquiry response module is arranged at the M2UA entity of described SG, is used for sending the link state inquiry response message with link-state information to the M2UA entity of described MGC; And
One link state inquiry audit responder module is arranged at the M2UA entity of described MGC, is used for reporting a link state inquiry audit response message with concrete link-state information to the MTP3 of described MGC protocol entity.
10. link state inquiry response device according to claim 9 is characterized in that, also comprises: a Link State request module, be arranged at the M2UA entity of described SG, and be used for sending a Link State request message to the MTP2 of described SG protocol entity.
11. according to claim 9 or 10 described link state inquiry response devices, it is characterized in that, also comprise: a Link State responder module, be arranged at the MTP2 protocol entity of described SG, be used for responding a Link State response message to the M2UA entity of described SG.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030046662A (en) * | 2001-12-06 | 2003-06-18 | 삼성전자주식회사 | Management method of signalling link in centralization system |
| CN1486024A (en) * | 2002-09-28 | 2004-03-31 | 华为技术有限公司 | Method for implementing signaling link fault reason report |
| CN1545278A (en) * | 2003-11-20 | 2004-11-10 | 中兴通讯股份有限公司 | Method for C path state detecting of V5 access adaptation |
| US20060182099A1 (en) * | 2003-06-24 | 2006-08-17 | Hewlett-Packard Development Company, L.P. | Processing of signalling messages according to one of a plurality of protocol stacks |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030046662A (en) * | 2001-12-06 | 2003-06-18 | 삼성전자주식회사 | Management method of signalling link in centralization system |
| CN1486024A (en) * | 2002-09-28 | 2004-03-31 | 华为技术有限公司 | Method for implementing signaling link fault reason report |
| US20060182099A1 (en) * | 2003-06-24 | 2006-08-17 | Hewlett-Packard Development Company, L.P. | Processing of signalling messages according to one of a plurality of protocol stacks |
| CN1545278A (en) * | 2003-11-20 | 2004-11-10 | 中兴通讯股份有限公司 | Method for C path state detecting of V5 access adaptation |
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