CN1317850C - A service interrupt processing method - Google Patents
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- CN1317850C CN1317850C CNB031456049A CN03145604A CN1317850C CN 1317850 C CN1317850 C CN 1317850C CN B031456049 A CNB031456049 A CN B031456049A CN 03145604 A CN03145604 A CN 03145604A CN 1317850 C CN1317850 C CN 1317850C
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Abstract
The present invention discloses a service interruption processing method. When the service interruption of an application server occurs, corresponding service interruption primitive is reported to a user by the second-layer user adaptation layer of a signaling transmission protocol on a signaling gateway side and an application server process side according to the protocol type; links processed by the application server are cut off by the user; when the service is restored, and user is informed.
Description
Technical field
The present invention relates to communication network technology, particularly a kind of processing method of service disconnection in the signaling system.
Background technology
Signaling system is the key technology of modern communication networks, and telecommunication apparatus is the key that guarantees high capable telecommunications network to the reliable transmission of signaling message.In conventional telecommunication network, there have been a series of standards and technology to guarantee the reliability of signaling system, as very ripe arrowband No.7 signaling system at present.Progressively maturation along with the IP packet network technologies, the IP packet network can be used for business such as voice-bearer, data, multimedia, traditional circuit-switched network and packet network are in fusing stage, for realizing the intercommunication of legacy circuit-switched networks network and IP packet network, the demand that transmission circuit exchange of signaling agreement on IP network occurred, as: transmission No.7 signaling.In order to satisfy the demand in IP network transmitting signaling agreement, IETF sets up a special signaling transmission group, has formulated signaling transfer protocol (abbreviation SIGTRAN) collection that is used for the legacy circuit-switched signaling protocol and transmits on IP network.Signaling System Number 7 Message Transfer Part second level customer adaptation layer protocol (abbreviation M2UA), ISDN user adaptation layer protocol (abbreviation ISDN Q.921-User Adaptation Layer) and V5.2-User Adaptation Layer agreement (being called for short the V5UA agreement) all are the agreements that SIGTRAN is concentrated, realize message transparent transmission between the Signaling System Number 7 Message Transfer Part second level (being called for short MTP2) and the Signaling System Number 7 Message Transfer Part third level (being called for short MTP3), Q921 and Q931, LAPV5 and the V5.2 respectively, the hierarchy of three kinds of agreements all is identical, consults shown in Figure 1.
SIGTRAN is asymmetric, is divided into SGW side (SG) and ASP side, and ASP is the application server process of MGC side.The networking application model of M2UA, IUA and V5UA is very similar, and the network model of three agreements is respectively as Fig. 2, Fig. 3 and shown in Figure 4:
With M2UA is example, consult Fig. 2, M2UA is responsible for transmitting the user message of MTP2 on IP network: the primitive of SGW (SG) being gone up MTP2 and last interlayer is assembled into M2UA message, and use M2UA message stream control transmission protocol (sctp) to connect and pass to M2UA on the application server process (ASP) by IP network, resolve the back by the M2UA on the ASP MTP3 issued in primitive; The M2UA of ASP side is assembled into M2UA message with the primitive that MTP3 sends to MTP2, and uses M2UA message SCTP to connect by IP network to pass to M2UA on the SG, resolve the back by the M2UA on the SG MTP2 issued in primitive.M2UA need guarantee that the interface of original MTP3/MTP2 is constant, will be in the primitive message that transmits reliably on the IP network between MTP2 and MTP3.Processing and the M2UA of IUA and V5UA are similar, and IUA is adaptive Q921/Q931 interface primitive, the then adaptive LAPV5/V5.2 interface of V5UA primitive.
M2UA, IUA and V5UA agreement all defined application server (Application Server, AS), SG and application server process (Application Server Process, notion ASP).For example, the AS of V5UA is exactly the logic entity of the last one group of physical link of treatment S G (V5.2 link).ASP is exactly an application server process, is the process instance of handling the AS business.Utilizing SCTP to be connected between SG and ASP communicates.For the ASP of AS service can active and standby and load sharing.Can be understood as the synthetic different AS of link group on the SG, the business on these links of AS can be carried in 1 to many SCTP connection, and these SCTP connections can be active and standby, also can load sharing, as shown in Figure 5.
Because signaling transfer protocol two-layer user adaptation layer can not be handled its user's business, causes the user's of signaling transfer protocol two-layer user adaptation layer service disconnection, this situation is called application server (AS) service disconnection.As shown in Figure 5, the ASP that handles the business of ASO comprises ASP0 and ASP1, if ASP0 and ASP1 all can not handle ASO business (for example: SCTP be connected 0 and SCTP1 all unavailable.One of reason that the unavailable UA of being of SCTP connection can not manage business) time, ASO also just can not handle the business of physical link 0 and physical link 1, and the message of physical link 0 and physical link 1 all can not arrive the opposite end.
In the prior art, user that can't notice signaling host-host protocol two-layer user adaptation layer after the AS service disconnection, make the user of signaling transfer protocol two-layer user adaptation layer can not know this situation timely, still send signaling message by the signaling link that belongs to the AS that this business interrupted, can cause losing of signaling message like this, thereby business is caused bigger influence.
Summary of the invention
The object of the present invention is to provide a kind of processing method of service disconnection, to solve in the prior art after the application server service disconnection, protocol layer still sends the problem of losing that signaling message causes signaling message by the signaling link that belongs to this application server.
Realize technical scheme of the present invention: a kind of processing method of service disconnection, described service disconnection is meant in the network that signaling end point, SGW and Media Gateway Controller are formed, the user message that the application server process on the Media Gateway Controller can not command transmitting host-host protocol two-layer user adaptation layer and cause its user's service disconnection; When taking place, service disconnection carries out following step:
The signaling transfer protocol two-layer user adaptation layer of SGW side is made use of three layer protocols issue service disconnection primitive from the respective protocol type to the two-layer protocol of its service; And disconnect by the two-layer protocol of described service all links with described application server processes;
The signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side reports the service disconnection primitive of respective protocol type to three layer protocols of its service; And disconnect by three layer protocols of described service all links with described application server processes.
Described protocol type comprises Signaling System Number 7 Message Transfer Part second level customer adaptation layer protocol M2UA, ISDN user adaptation layer protocol IUA and V5.2-User Adaptation Layer agreement V5UA.
When business recovery, the signaling transfer protocol two-layer user adaptation layer of SGW side sends to application server process according to all signaling link structure release indication Release Indication message of the application server processes of service disconnection; All physical links that the signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side is handled application server AS recovering information are notified three layer protocols of its service.
The present invention can be after the application server service disconnection, the two-layer protocol and three layer protocols of notice signaling host-host protocol two-layer user adaptation layer service in time, allow the two-layer protocol and three layer protocols of described service disconnect by all physical links of this application server processes, prevent that the two-layer protocol of described service and three layer protocols from continuing to send user message on these physical links, thereby avoid or reduced losing of user message; Simultaneously, when business recovery, also notify the two-layer protocol of described service in time to recover being connected of physical link with three layer protocols.
Description of drawings
Fig. 1 is the transmitting layered structure of signaling;
Fig. 2 is the basic application model of M2UA;
Fig. 3 is the basic application model of ISDN Q.921-User Adaptation Layer;
Fig. 4 is the basic application model of V5UA agreement;
Fig. 5 is that physical link, application server and application server process concern schematic diagram;
Fig. 6 is the process chart of SGW side to service disconnection/recovery;
Fig. 7 is the process chart of application server process side to service disconnection/recovery.
Embodiment
Service disconnection among the present invention is meant in the network that signaling end point, SGW and Media Gateway Controller are formed, the user message that the application server process on the Media Gateway Controller (ASP) can not command transmitting host-host protocol two-layer user adaptation layer and cause its user's service disconnection.
Cause signaling message to be lost for fear of application server (AS) service disconnection, when the application server service disconnection takes place, report the service disconnection primitive of respective type to the two-layer protocol of its service by signaling transfer protocol two-layer user adaptation layer in the SGW side; Application server process side on Media Gateway Controller is reported the service disconnection primitive of respective protocol type to three layer protocols of its service by signaling transfer protocol two-layer user adaptation layer; Disconnect by the two-layer protocol of described service and three layer protocols all links described application server processes; The information of when business recovery interrupting service being recovered is notified the two-layer protocol and three layer protocols of described service.
Consult Fig. 2, in M2UA, the signaling transfer protocol two-layer user adaptation layer of SGW side is M2UA, and the two-layer protocol of the signaling transfer protocol two-layer user adaptation layer service of SGW side is meant MTP2; The signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side is M2UA, and three layer protocols of the signaling transfer protocol two-layer user adaptation layer service of Media Gateway Controller side are MTP3.
Consult Fig. 3 in ISDN Q.921-User Adaptation Layer, the signaling transfer protocol two-layer user adaptation layer of SGW side is IUA, the two-layer protocol of the signaling transfer protocol two-layer user adaptation layer service of SGW side is meant Q921, the signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side is IUA, and three layer protocols of the signaling transfer protocol two-layer user adaptation layer service of Media Gateway Controller side are Q931.
Consult Fig. 4 in the V5UA agreement, the signaling transfer protocol two-layer user adaptation layer of SGW side is V5UA, and the two-layer protocol of the signaling transfer protocol two-layer user adaptation layer service of SGW side is meant LAPV5; The signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side is V5UA, and three layer protocols of the signaling transfer protocol two-layer user adaptation layer service of Media Gateway Controller side are V5.2.
Respectively from SGW side (SG side) and application server process side (being called for short the ASP side), the processing procedure to service disconnection and recovery during to employing M2UA, ISDN Q.921-User Adaptation Layer and V5UA agreement describes below in conjunction with accompanying drawing.
One, the processing of SG side, consult shown in Figure 6:
1, after the AS service disconnection took place, signaling transfer protocol two-layer user adaptation layer reported corresponding business to interrupt primitive according to protocol type to the two-layer protocol of its service, will be disconnected by all physical links that this AS handles by this user; If signaling transfer protocol two-layer user adaptation layer continues also to receive that upper-layer user's message also should disconnect physical link after the service disconnection.The service disconnection primitive of SG side refers to " Stop " primitive of MTP2/MTP3, the DL Release Request primitive of Q921/Q931 and the MDL ReleaseRequest primitive of LAPV5/V5.2.The processing of three agreements is as follows:
(1) in M2UA, during the AS service disconnection, M2UA reports Stop primitive to MTP2 one by one according to all signaling links that the AS of service disconnection handles, and MTP2 receives all signaling links of being handled by this AS of removing signaling end point (SEP) behind the Stop primitive.If also continue to receive the MTP2 user message after the service disconnection, also should report Stop primitive according to the signaling link under the MTP2 user message of receiving, remove this link of SEP by MTP2.
(2) in ISDN Q.921-User Adaptation Layer, during the AS service disconnection, IUA reports DL Release Request primitive to Q921 one by one according to all signaling links that the AS of service disconnection handles, and Q921 receives all signaling links of being handled by this AS of removing SEP behind the DL ReleaseRequest primitive.If also continue to receive the user message of Q921 after the service disconnection, also should report DL Release Request primitive according to the signaling link under the Q921 user message of receiving, remove this link of SEP by Q921.
(3) in the V5UA agreement, during the AS service disconnection, V5UA reports MDL Release Request primitive according to all signaling links that the AS of service disconnection handles to LAPV5, and LAPV5 receives all signaling links that this AS of removing SEP behind the MDLRelease Request primitive handles; If also continue to receive the user message of LAPV5 after the service disconnection, also should report MDL Release Request primitive according to the signaling link under the LAPV5 user message of receiving, remove this link of SEP by LAPV5.
2, during the AS business recovery: because in service disconnection, the SG side has disconnected physical link, the MGC side does not know that also if the MGC side does not initiatively require SG side disconnection physical link, at this moment MGC may think also that the physical link of SG side is in linking status.Therefore, when business recovery, signaling transfer protocol two-layer user adaptation layer is issued ASP according to all physical link structure Release Indication message that this AS handles, the two-layer protocol of the signaling transfer protocol two-layer user adaptation layer service of notice ASP end, all physical links that this AS handles disconnect.The regulation that the form of Release Indication message and structure are deferred to each agreement.
Because link directly do not removed by signaling transfer protocol two-layer user adaptation layer, but receive by MTP2, Q921 or LAPV5 and dismantle behind the primitive of dismounting link of signaling transfer protocol two-layer user adaptation layer.The primitive of removing link was three layers of primitive used when requiring two layers to remove links originally, and therefore, the signaling transfer protocol two-layer user adaptation layer of SG side is made use of three layers and issued this primitive and allow two layers to remove links.MTP2/Q921/LAPV5 tears chain process open and is finished jointly by sending out message mutually by SG side and SEP, whether needs to rebulid chain route MTP3/Q931/V5.2 in the time of recovery and decides.
Two, the processing of application server process (ASP) side:
1, after the AS service disconnection, signaling transfer protocol two-layer user adaptation layer reports corresponding business to interrupt primitive according to protocol type to three layer protocols of its service, by three layer protocols of described service all physical links that AS handles is disconnected; After the service disconnection if also continue to receive that upper-layer user's message also should disconnect physical link.The service disconnection primitive of ASP side comprises the Out of service primitive of MTP2/MTP3, the DL Release Indication primitive of Q921/Q931 and the MDL Release Indication primitive of LAPV5/V5.2.The processing that three agreements are carried out is as follows:
(1) in M2UA, during the AS service disconnection, M2UA reports Out of service primitive to MTP3 one by one according to all signaling links that the AS of service disconnection handles, and MTP3 receives all signaling links of being handled by this AS of removing SEP behind the Out of service primitive.If also continue to receive the MTP3 user message after the service disconnection, also should report Out ofservice primitive according to the signaling link under the MTP3 user message, remove this link of SEP by MTP3;
(2) in ISDN Q.921-User Adaptation Layer, during the AS service disconnection, IUA reports DL Release Indication primitive to Q931 one by one according to all signaling links that the AS of service disconnection handles, and Q931 receives all signaling links of being handled by this AS of removing SEP behind the DL ReleaseIndication primitive.If also continue to receive the user message of Q931 after the service disconnection, also should report DL Release Indication primitive according to the signaling link under the Q931 user message of receiving, remove this link of SEP by Q931;
(3) be in the V5UA agreement, during the AS service disconnection, V5UA reports MDL Release Indication primitive according to all signaling links that the AS of service disconnection handles to V5.2, and V5.2 receives all signaling links of being handled by this AS of removing SEP behind the MDLRelease Indication primitive.If also continue to receive the user message of V5.2 after the service disconnection, also should report MDL Release Indication primitive according to the signaling link under the V5.2 user message of receiving, remove this link of SEP by V5.2.
2, during the AS business recovery, notify three layer protocols of its service by signaling transfer protocol two-layer user adaptation layer, all physical links that AS handles recover, and determine link re-establishment still to remove as required by three layer protocols of described service.
Claims (8)
1, a kind of processing method of service disconnection, described service disconnection is meant in the network that signaling end point, SGW and Media Gateway Controller are formed, the user message that the application server process on the Media Gateway Controller can not command transmitting host-host protocol two-layer user adaptation layer and cause its user's service disconnection; It is characterized in that, when service disconnection takes place, carry out following step:
The signaling transfer protocol two-layer user adaptation layer of SGW side is made use of three layer protocols issue service disconnection primitive from the respective protocol type to the two-layer protocol of its service; And disconnect by the two-layer protocol of described service all links with described application server processes;
The signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side reports the service disconnection primitive of respective protocol type to three layer protocols of its service; And disconnect by three layer protocols of described service all links with described application server processes.
2, the method for claim 1 is characterized in that, described protocol type comprises Signaling System Number 7 Message Transfer Part second level customer adaptation layer protocol M2UA, ISDN user adaptation layer protocol IUA and V5.2-User Adaptation Layer agreement V5UA.
3, method as claimed in claim 2 is characterized in that, when described protocol type is Signaling System Number 7 Message Transfer Part second level customer adaptation layer protocol M2UA:
Described SGW side issuing service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer Signaling System Number 7 Message Transfer Part second level user adaptation layer M2UA of SGW side makes use of three layer protocol MTP3 according to all signaling links of the application server processes of service disconnection and interrupts primitive Stop to the two-layer protocol MTP2 of its service issuing service one by one; The two-layer protocol of described service disconnects all links of described application server processes and is meant: the two-layer protocol MTP2 of described service receives all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive Stop;
Described Media Gateway Controller side reporting service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer Signaling System Number 7 Message Transfer Part second level user adaptation layer M2UA of Media Gateway Controller side interrupts primitive Out of service to three layer protocol MTP3 reporting services of its service one by one according to the described signaling link of the application server processes of service disconnection; Three layer protocols of described service disconnect all links of described application server processes and are meant: three layer protocol MTP3 of described service receive all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive Out ofservice.
4, method as claimed in claim 2 is characterized in that, when described protocol type is ISDN user adaptation layer protocol IUA:
Described SGW side issuing service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer ISDN user adaptation layer IUA of SGW side makes use of three layer protocol Q931 according to all signaling links of the application server processes of service disconnection and interrupts primitive DL Release Request to the two-layer protocol Q921 of its service issuing service one by one; The two-layer protocol of described service disconnects all links of described application server processes and is meant: the two-layer protocol Q921 of described service receives all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive DL ReleaseRequest;
Described Media Gateway Controller side reporting service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer ISDN user adaptation layer IUA of Media Gateway Controller side interrupts primitive DL Release Indication to three layer protocol Q931 reporting services of its service one by one according to the described signaling link of the application server processes of service disconnection; Three layer protocols of described service disconnect all links of described application server processes and are meant: three layer protocol Q931 of described service receive all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive DL ReleaseIndication.
5, method as claimed in claim 2 is characterized in that, when described protocol type is V5.2-User Adaptation Layer agreement V5UA:
Described SGW side issuing service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer V5.2-User Adaptation Layer V5UA of SGW side makes use of three layer protocol V5.2 according to all signaling links of the application server processes of service disconnection and interrupts primitive MDL Release Request to the two-layer protocol LAPV5 of its service issuing service one by one; The two-layer protocol of described service disconnects all links of described application server processes and is meant: the two-layer protocol LAPV5 of described service receives all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive MDL ReleaseRequest;
Described Media Gateway Controller side reporting service interrupts primitive and is meant: the signaling transfer protocol two-layer user adaptation layer V5.2-User Adaptation Layer V5UA of Media Gateway Controller side interrupts primitive MDLRelease Indication to three layer protocol V5.2 reporting services of its service one by one according to the described signaling link of the application server processes of service disconnection; Three layer protocols of described service disconnect all links of described application server processes and are meant: three layer protocol V5.2 of described service receive all signaling links by described application server processes of removing signaling end point SEP behind the described service disconnection primitive MDL Release Indication.
6, as the arbitrary described method of claim 1 to 5, it is characterized in that, after service disconnection, also link is disconnected even signaling transfer protocol two-layer user adaptation layer is also received upper-layer user's message.
7, as the arbitrary described method of claim 1 to 5, it is characterized in that, when business recovery, the signaling transfer protocol two-layer user adaptation layer of SGW side sends to application server process according to all signaling link structure release indication Release Indication message of the application server processes of service disconnection.
8, as the arbitrary described method of claim 1 to 5, it is characterized in that, when business recovery, all physical links that the signaling transfer protocol two-layer user adaptation layer of Media Gateway Controller side is handled application server AS recovering information are notified three layer protocols of its service.
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| EP1806870B1 (en) * | 2006-01-06 | 2010-09-22 | Alcatel Lucent | Method for providing data and data transmission system |
| CN101132399B (en) * | 2006-08-24 | 2010-09-29 | 中兴通讯股份有限公司 | Method for recovering signaling transport protocols service process state consistency |
| CN101031148B (en) * | 2007-03-19 | 2010-04-14 | 华为技术有限公司 | Method and apparatus for transmitting notify message |
| CN101296170B (en) * | 2007-04-24 | 2011-08-24 | 中兴通讯股份有限公司 | Optimization system based on IP network signaling transport protocols and implementing method thereof |
| CN102724072A (en) * | 2012-06-20 | 2012-10-10 | 华为技术有限公司 | Method, unit and system for disaster recovery switching |
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