CN102595360A - Calling processing method and system thereof - Google Patents
Calling processing method and system thereof Download PDFInfo
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- CN102595360A CN102595360A CN2011100014392A CN201110001439A CN102595360A CN 102595360 A CN102595360 A CN 102595360A CN 2011100014392 A CN2011100014392 A CN 2011100014392A CN 201110001439 A CN201110001439 A CN 201110001439A CN 102595360 A CN102595360 A CN 102595360A
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Abstract
The invention discloses a calling processing method and a system thereof. The method comprises the following steps: after a media gateway MG is switched to a second media gateway controller (MGC) from a first media gateway (MGC) where the MG is registered, the MG is called; an upper level network element sends user information of the MG to the second MGC; the second MGC initiates a register flow of the MG to the upper level network element, and calling is in continuation. Through the method and the system, loss is reduced.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of call processing method and system.
Background technology
Next generation network (Next Generation Network; Abbreviate NGN as) and IP Multimedia System (IP MultimediaSubsystem; Abbreviate IMS as) in, through traditional switch being separated into Media Gateway Controller (Media GatewayController abbreviates MGC as) and WMG (Media Gateway; Abbreviate MG as); Utilize the characteristics of IP/ATM transmission network, can realize on the one hand the mutual of voice, image, data, MGC can manyly more easily introduce professional on the other hand.MGC also can pass through MG and traditional PSTN (Public Switched TelephoneNetwork abbreviates PSTN as), public land mobile net (Public Land Mobile Network abbreviates PLMN as) network interworking.
In next generation network; H.248 or MGCP (Media Gateway Controller Protocol abbreviates MGCP as) (two protocol application scenes are similar with effect, and back literary composition is convenient for describing; As with concrete protocol-independent; Only with H.248 explanation separately) as the main media gateway protocols between MGC and the MG, the main completion: the foundation and the release of the media channel among the MG are accomplished in (1) under MGC control; (2) under MGC control, the media channel and being connected with removing of bearer path of accomplishing among the MG are connected; (3) down, the configuration among the completion MG to the attribute of media channel and bearer path in MGC control; (4) in MG, accomplish the operation of MGC, comprise playback, audit etc. media channel and bearer path; (5) event among the MG is reported MGC; (6) realize some simple call signalings, like analog line signaling, channel associated signalling etc.H.248/MGCP, can find out, be a kind of control protocol up and down, and MGC controls the behavior of MG fully.
Along with the development of soft switch and IMS, a large amount of subscriber terminal equipment IAD controllers causes the IP address in short supply, and terminal user management is complicated, problems such as the fail safe of system.Edge access control equipment (BorderAccess Control; Abbreviate BAC as; Also have multiple different expression, as: broad access network gate (BGW-Broad GateWay), session border control appliance SBC-Session Border Control) can satisfy dissimilar user (comprising enterprise, individual, mobile subscriber) simultaneously; The access demand of multiple capacity, and support various protocols MGCP, agent functionality H.248 simultaneously.Realize signaling, Media Stream address transition, insert user's authentication, management, the control and management of Business Stream, functions such as resource management.
From the telecom operation angle, the disconnected or equipment fault for the network of avoiding various emergency situations to cause on the network organizing, must have disaster-tolerant backup to consider.Fig. 1 is the network architecture sketch map according to the IMS of correlation technique, and is as shown in Figure 1, and the MGC that MG inserts needs two MGC, at least as active and standby.Simultaneously, MG also is similarly when inserting MGC through BAC, needs two MGC as active and standby.Fig. 2 is the network architecture sketch map that the MGC switching takes place according to the IMS of correlation technique, and is as shown in Figure 2, when switching has taken place MGC; And because MG is numerous; Or MG fails reasons such as discoverys in time, also is not able to do in time toward new MGC registration, thereby makes the problem that the calling of new generation can't continue.
At AGCF (Access Gateway Control Function abbreviates AGCF as) 1, need to prove that the function that the AGCF1 here realizes is identical with the function that MGC realizes.MG inserts the IMS network and under the normal situation of network condition between the MG, MG belongs to AGCF1, and if AGCF1 takes place breaks down, or network problem appears, then MG can cut to AGCF2 automatically, promptly usually said disaster tolerance switches.Need to prove, having under the network architecture of BAC, see Fig. 2, the BAC disaster tolerance switches, and belongs to new MGC, and the MG of this moment does not know fully, and this situation takes place more easily, but is not limited to this scene.And for AGCF2, switching all MG that come all is brand-new user, needs it to register again.In this hour of log-on, new called if MG produces again, the processing mode of prior art all is direct refusal, and Fig. 3 is the flow chart that switches according to AGCF in the correlation technique, and as shown in Figure 3, this flow process comprises the steps:
Step S301, MG (for example, through BAC) is registered under the AGCF1;
Step S302 network failure or MG occur reasons such as disaster tolerance takes place automatically between MG and the AGCF1, make MG belong under the AGCF2;
Need to prove that if insert through meeting BAC, BAC switches to new AGCF, concerning MG, the disaster tolerance change action of perception BAC not; If there is not BAC, then MG equipment automaticallyes switch into MGC2, but does not initiate registration.
Step S303, IMS core layer CSCF (Call Session Control Function abbreviates CSCF as, comprises I/P/S-CSCF) is called, finds the corresponding called subscriber of AGCF2 to be the user under the MG;
Step S304, for AGCF2, this MG did not always register, so must refuse this calling.Whole flow process finishes, call failure.
Because the user that AGCF inserts, enormous amount in theory, it is longer that MG registers the time that needs again like this, called if MG produces again in this hour of log-on, owing on AGCF2, all not registering, so thereby must refuse the problem that this calling causes call loss.
Summary of the invention
Main purpose of the present invention is to provide a kind of call processing method and system, to address the above problem at least.
According to an aspect of the present invention, a kind of call processing method is provided, has comprised: WMG MG is after first media gateway controller MGC from its registration switches on the 2nd MGC, and said MG is called out; The upper strata network element sends to said the 2nd MGC with the user profile of said MG; Said the 2nd MGC initiates the register flow path of said MG to said upper strata network element, and the said calling that continues.
Preferably, before said WMG MG switched to said the 2nd MGC from a MGC of its registration, also comprise: a said MGC was to the upper strata network element registration, and the user profile of the said MG that will on a said MGC, register sends to this upper strata network element.
Preferably, the user profile that a said MGC carries said MG through the contact CONTACT field of session initiation protocol SIP, and the user profile of said MG sent to the upper strata network element.
Preferably; At said the 2nd MGC before said upper strata network element is initiated the register flow path of said MG; Said the 2nd MGC verifies the legitimacy of the user profile of said MG, and after checking is passed through, initiates the register flow path of said MG again to said upper strata network element.
Preferably, before said upper strata network element was initiated the register flow path of said MG, said the 2nd MGC carried out authentication according to the user profile of said MG at said the 2nd MGC, and after authentication is passed through, initiated the register flow path of said MG again to said upper strata network element.
Preferably; At said the 2nd MGC before said upper strata network element is initiated the register flow path of said MG; Said the 2nd MGC determines whether to initiate to said upper strata network element the register flow path of said MG according to the strategy that is provided with in advance; Wherein, the said strategy that is provided with in advance is used for confirming the MG of needs initiation register flow path.
Preferably, said method also comprises: confirm not to initiate under the situation of register flow path of said MG to said upper strata network element at said the 2nd MGC, said the 2nd MGC refuses said calling.
Preferably, said upper strata network element is carried at the user profile of said MG in the request line Requestline field of Session Initiation Protocol, and sends to said the 2nd MGC.
Preferably, said upper strata network element is CSCF CSCF.
According to a further aspect in the invention; A kind of call processing system also is provided; Comprise: WMG MG, first media gateway controller MGC, the 2nd MGC and upper strata network element; Said upper strata network element is used at said MG after the said MGC from its registration switches on the 2nd MGC and called out, and the user profile of said MG is sent to said the 2nd MGC; Said the 2nd MGC is used for initiating to the upper strata network element register flow path of said MG, and the said calling that continues.
Preferably, a said MGC is used for to the upper strata network element registration, and the user profile of the said MG that will on a said MGC, register sends to this upper strata network element.
Through the present invention, adopt WMG MG after first media gateway controller MGC from its registration switches on the 2nd MGC, said MG is called out; The upper strata network element sends to said the 2nd MGC with the user profile of said MG; Said the 2nd MGC initiates the register flow path of said MG to the upper strata network element, and the said calling that continues.Solve the problem of switching the call loss that produces because of disaster tolerance, and then reduced call loss.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the network architecture sketch map according to the IMS of correlation technique;
Fig. 2 is the network architecture sketch map that the MGC switching takes place according to the IMS of correlation technique;
Fig. 3 is the flow chart that switches according to AGCF in the correlation technique;
Fig. 4 is the flow chart of the call processing method of enforcement according to the present invention;
Fig. 5 is the flow chart of call processing method according to the preferred embodiment of the invention.
Embodiment
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Be that example describes in the present embodiment with MGC, but the MGC has here comprised the network entity and the functional module that can realize the MGC function, for example, AGCF (Access Gateway Control Function abbreviates AGCF as).
Present embodiment provides a kind of call processing method, and Fig. 4 is the flow chart of the call processing method of enforcement according to the present invention, and as shown in Figure 4, this flow process comprises the steps:
Step S402, MG are after the MGC from its registration switches on the 2nd MGC, and the user on this MG is called out (it is called also can be called MG);
Step S404, the upper strata network element sends to the 2nd MGC with the user profile of this MG, and wherein, the upper strata network element can any network element that can realize its function, and for example, the upper strata network element is CSCF CSCF;
Step S406, the 2nd MGC is to the register flow path of upper strata network element initiation MG, and replay call.Need to prove that the upper strata network element of this step can be the same upper strata network element (upper strata network element in the present embodiment is CSCF) among the step S404, also can not be same upper strata network element.
Through above-mentioned steps, when MG was called, the upper strata network element sent to the 2nd MGC with the user profile on this MG, and the 2nd MGC initiates the register flow path of MG, had changed the way of directly refusing in the prior art, thereby had solved the problem that exists in the prior art.
Preferably, when implementing, the upper strata network element can get access to the user profile of this MG in several ways, and for example, a MGC is when the network element registration of upper strata, and the user profile of the MG that a MGC will register above that sends to the upper strata network element; Also can not when registration, use a message that is exclusively used in transmission MG user profile to send.Certainly the user profile to upper strata network element transmission MG implements more convenient when registration.Preferably, the user profile that a MGC carries MG through the contact CONTACT field of session initiation protocol SIP, and the user profile of MG sent to the upper strata network element.
Preferably, when implementing, in order to guarantee the legitimacy of MG; Before the 2nd MGC initiated the register flow path of MG to the upper strata network element, the 2nd MGC can verify the legitimacy of the user profile of MG, and after checking is passed through; Initiate the register flow path of MG again to the upper strata network element, for example, when implementing; Whether the checking of being carried out: testing the message header that shows informed source in the H248/MGCP message header, is the user of legal configuration if can comprising.
In addition, preferably, before the 2nd MGC initiated the register flow path of MG to the upper strata network element, the 2nd MGC carried out authentication according to the user profile of MG, and after authentication is passed through, initiated the register flow path of MG again to the upper strata network element.Certainly, authentication can be carried out with the step of checking MG legitimacy together.Need to prove that authentication belongs to optional step, can carry out according to this user's collocation strategy.And, adopt the processing mode of which kind of authentication all not influence the enforcement of this preferred implementation, for example, can adopt general md5 authentication algorithm to carry out authentication.
Preferably, whether support the processing in the present embodiment in order to distinguish MG, can formulate good strategy in advance, this strategy determines whether to adopt the processing in the present embodiment to different MG.For example, before the 2nd MGC initiated the register flow path of MG to the upper strata network element, the strategy that the 2nd MGC basis is provided with in advance determined whether to initiate to the upper strata network element register flow path of MG, and wherein, the strategy that is provided with in advance is used for confirming the MG of needs initiation register flow path.Should strategy through using, operator is distinguished using the processing in the present embodiment to MG, can reach other purpose through such differentiation, for example, can consider whether the function that provides in the present embodiment to be charged etc.
Preferably, if adopt above-mentioned processing procedure (for example, above-mentioned verification process, tactful deterministic process, legitimate verification process), confirm not to initiate under the situation of register flow path of MG to the upper strata network element at the 2nd MGC, the 2nd MGC refuse calling.
Preferably, the upper strata network element is carried at the user profile of MG in the request line Requestline field of Session Initiation Protocol, and sends to the 2nd MGC.
In the present embodiment; A kind of call processing system also is provided; Comprise: MG, a MGC, the 2nd MGC and upper strata network element, upper strata network element are used at MG after the MGC from its registration switches on the 2nd MGC and called out, and the user profile of MG is sent to the 2nd MGC; The 2nd MGC is used for initiating to the upper strata network element register flow path of MG, and replay call.
Preferably, a MGC is used for to the upper strata network element registration, and the user profile of the MG that will on a MGC, register sends to this upper strata network element.
Solved MGC through this system disaster tolerance takes place, for example, inserted through BAC, BAC has taken place under the situation of disaster tolerance switching, and the problem of a large amount of call losses of generation has reached the effect that satisfies the telecom operation maintenance requirement.
Following preferred embodiment is the explanation that the situation that has BAC to insert is carried out; But during actual enforcement, be not limited to the situation that BAC inserts, when not having BAC to insert; BAC in the flow chart omitted getting final product, is that example switches from MG and begins to describe below with AGCF.Fig. 5 is the flow chart of call processing method according to the preferred embodiment of the invention, and as shown in Figure 5, this flow process comprises the steps:
Step S501, the MG normal registration need to prove that MG carries out before disaster tolerance switches to the normal registration process of AGCF1 to AGCF1, is the registration of carrying out under the normal and normal situation of network at AGCF;
When step S502, AGCF1 register to more high-rise key-course CSCF, pertinent user information is carried.Need to prove; The user related information here is carried into CSCF's when normal registration; And its mode of carrying user profile is a kind of incessantly; For example, the contact CONTACT field that can pass through Session Initiation Protocol is with on the required user related information band, and this non-expansion that just had originally as agreement of field;
Step S503, CSCF comprises service call conversation control function (Service-CSCF; Abbreviate S-CSCF as) and query CSCF (Interrogating-CSCF; Abbreviate I-CSCF as), in the process of registration, user related information this locality that AGCF1 carries is preserved;
Step S504; The back CSCF that succeeds in registration replys success response to AGCF;
Step S505, AGCF replys the response of succeeding in registration to MG;
Step S506, the occurring network situation, if between MG and the AGCF BAC is arranged, BAC situation such as switch, MG switches to AGCF2;
Step S507, core side makes a call, user under the called calling MG;
Step S508, CSCF find the AGCF2 of present adapter MG, and the callee side call flow begins;
Need to prove; The user related information that CSCF will carry up through the AGCF1 registration before carries; User profile is carried the mode of getting off in the specific implementation here; Confirm as the case may be to be fit to the mode of situation at that time, for example, user profile carries through the Requestline field of Session Initiation Protocol.
Step S509, the legitimacy of the user profile of getting off is carried in the AGCF2 verification, and flow process such as authentication (authentication is optional, according to corresponding strategies configuration decision);
Step S510 passes through if go up the step, again according to strategy judge this MG whether needs get into the flow process of the automatic connection calling of this claim;
Step S511 if step S509 and step S510 can not pass through, then directly replys ERROR to MG, and processing mode and the prior art flow process of this moment are similar, and promptly refusal should be called out;
Step S512, if step S509 and step S510 pass through, then on behalf of the register flow path of initiating this MG, this locality is provided with state and passes through for registration;
Step S513 initiates registration to CSCF, and the similar Proxy Call Session Control Function of AGCF (Proxy-CSCF abbreviates P-CSCF as) therefore, is to query CSCF (Interrogating-CSCF abbreviates I-CSCF as) registration in this step;
Need to prove, a MG, user's possibility is more than one under it, and the processing mode that it is relevant and a plurality of flow processs are similar, and this sentences a user and describes for example.
Step S514, I-CSCF is to home subscriber server (Home Subscriber Server abbreviates HSS as) searching for user relevance information;
Step S515, HSS returns user related information;
Step S516, I-CSCF selects the service call conversation control function (Service-CSCF abbreviates S-CSCF as) of ownership;
Step S517, I-CSCF is to the S-CSCF of ownership registration;
Step S518, S-CSCF carries out authentication to HSS, need to prove, and this place is according to policy configurations, and is optional, if do not need then leap to step S527 to go on foot, but is not with authentication information, promptly do not need the register flow path of authentication;
Step S519 initiates authentication;
Step S520, because registration does not for the first time have authentication information, general this authentication registration failure, HSS returns failure;
Step S521, same S-CSCF returns registration failure message to I-CSCF;
Step S522, same I-CSCF returns registration failure message to AGCF;
Step S523, AGCF carry the authentication information registration again;
Step S524, I-CSCF are again to the HSS searching user's information;
Step S525, HSS returns user related information;
Step S526, I-CSCF choose the S-CSCF of ownership;
Step S527, I-CSCF is to the S-CSCF of ownership, and this carries authentication information;
Step S528, S-CSCF carries out the authentication registration to HSS;
Step S529, because this registration carries relevant authentication information, this authentication registration is passed through, HSS returns success;
Step S530, S-CSCF returns the message that succeeds in registration to I-CSCF;
Step S531, I-CSCF returns the message that succeeds in registration to AGCF;
Step S532, AGCF have returned to MG and have exhaled response message, and this calling normally continues.
Can solve in next generation network (NGN)/IP Multimedia System (IMS) through above-mentioned preferred embodiment; IAD at the core control equipment of its access (for example; Insert or do not insert through BAC through BAC) disaster tolerance takes place switches after, the problem of a large amount of call losses of generation has reduced because the call loss problem that switching causes; Make the user fully without the switching of perception core control equipment thereby reached, satisfy the effect of carrier class operating and maintenance requirements.
Obviously; It is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the storage device; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a call processing method is characterized in that, comprising:
WMG MG is after first media gateway controller MGC from its registration switches on the 2nd MGC, and said MG is called out;
The upper strata network element sends to said the 2nd MGC with the user profile of said MG;
Said the 2nd MGC initiates the register flow path of said MG to said upper strata network element, and the said calling that continues.
2. method according to claim 1 is characterized in that, before said WMG MG switches to said the 2nd MGC from a MGC of its registration, also comprises:
A said MGC is to the upper strata network element registration, and the user profile of the said MG that will on a said MGC, register sends to this upper strata network element.
3. method according to claim 2 is characterized in that, the user profile that a said MGC carries said MG through the contact CONTACT field of session initiation protocol SIP, and the user profile of said MG sent to the upper strata network element.
4. method according to claim 1 is characterized in that,
Before said upper strata network element was initiated the register flow path of said MG, said the 2nd MGC verified the legitimacy of the user profile of said MG, and after checking is passed through, initiates the register flow path of said MG again to said upper strata network element at said the 2nd MGC.
5. method according to claim 1 is characterized in that,
Before said upper strata network element was initiated the register flow path of said MG, said the 2nd MGC carried out authentication according to the user profile of said MG at said the 2nd MGC, and after authentication is passed through, initiated the register flow path of said MG again to said upper strata network element.
6. method according to claim 1 is characterized in that,
At said the 2nd MGC before said upper strata network element is initiated the register flow path of said MG; Said the 2nd MGC determines whether to initiate to said upper strata network element the register flow path of said MG according to the strategy that is provided with in advance; Wherein, the said strategy that is provided with in advance is used for confirming the MG of needs initiation register flow path.
7. according to each described method in the claim 4 to 6, it is characterized in that, also comprise
Confirm not to initiate under the situation of register flow path of said MG to said upper strata network element at said the 2nd MGC, said the 2nd MGC refuses said calling.
8. according to each described method in the claim 1 to 6, it is characterized in that,
Said upper strata network element is carried at the user profile of said MG in the request line Requestline field of Session Initiation Protocol, and sends to said the 2nd MGC.
9. according to each described method in the claim 1 to 6, it is characterized in that said upper strata network element is CSCF CSCF.
10. call processing system comprises: WMG MG, first media gateway controller MGC, the 2nd MGC and upper strata network element, it is characterized in that,
Said upper strata network element is used at said MG after the said MGC from its registration switches on the 2nd MGC and called out, and the user profile of said MG is sent to said the 2nd MGC;
Said the 2nd MGC is used for initiating to the upper strata network element register flow path of said MG, and the said calling that continues.
11. system according to claim 9 is characterized in that,
A said MGC is used for to the upper strata network element registration, and the user profile of the said MG that will on a said MGC, register sends to this upper strata network element.
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| CN103580895A (en) * | 2012-07-31 | 2014-02-12 | 中国电信股份有限公司 | Access gateway controller disaster tolerance method and system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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