CN102595361A - Call processing method and call processing system - Google Patents
Call processing method and call processing system Download PDFInfo
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- CN102595361A CN102595361A CN201110001441XA CN201110001441A CN102595361A CN 102595361 A CN102595361 A CN 102595361A CN 201110001441X A CN201110001441X A CN 201110001441XA CN 201110001441 A CN201110001441 A CN 201110001441A CN 102595361 A CN102595361 A CN 102595361A
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Abstract
The invention discloses a call processing method and a call processing system. The method comprises the steps of: switching a first media gateway controller (MGC) registered by a media gateway (MG) to a second MGC by the media gateway (MG); initiating a call by the MG; initiating a registration flow of MG to a network element at the upper layer and continuing to connect the call by the second MGC. In the invention, call 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 (Border Access 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.
Be scene that typically has BAC to insert in the correlation technique below, need to prove: the scene when this scene is not limited to SBC and inserts, use equally for the scene that does not have SBC to insert, only need remove SBC in the drawings, promptly MG directly and MGC mutual.Under the normal situation of network condition between MGC1 and the BAC, belong to MGC1, and if MGC1 takes place breaks down, or network problem BAC then can cut to MGC2 automatically, that is, usually said disaster tolerance switches.Switch if disaster tolerance takes place BAC, not perception for MG then is perception for MGC2, and all MG below the BAC are brand-new users, need it to register again.And if BAC lets its following all MG register again, must notify these MG.Simultaneously, BAC is an interconnecting device, in theory can below the number of users that connects huge, like this its down MG register again and need the long time.At this moment, the new calling that MG produces again, owing to all also do not register on the MGC2, so the problem that this calling causes call loss must occur refusing.
For the problems referred to above, the processing mode in the correlation technique is direct refusal, and Fig. 3 is the schematic flow sheet that the MGC switching takes place according to the IMS of correlation technique, and as shown in Figure 3, this flow process comprises the steps:
Step S301, MG (through BAC) registration;
Step S302, this moment, BAC belonged under MGC1, and therefore, MG is registered under the MGC1 through BAC;
Disaster tolerance takes place and switches in step S303, BAC, and perhaps MG disaster tolerance takes place automatically belongs under the MGC2;
Need to prove, if connect BAC, concerning MG, the disaster tolerance change action of perception BAC not; If do not connect BAC, then MG equipment automatically switches to MGC2, but does not initiate registration;
Step S304, MG makes a call;
Step S305, BAC transmit or MG directly finds subsequent use MGC, will rise and exhale message goes MGC2;
Step S306, for MGC2, this MG did not always register, and therefore refused this calling;
Step S307, if BAC is arranged, then the BAC forwards that will refuse to exhale is to MG, whole flow process finishes, call failure.
Therefore, in correlation technique, there is the problem of switching the call loss that produces because of disaster tolerance.
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 switches to the 2nd MGC from first media gateway controller MGC of its registration; Said MG makes a call; Said the 2nd MGC initiates the register flow path of said MG to the upper strata network element, and continues and put logical this calling.
Preferably, before said upper strata network element was initiated the register flow path of said MG, said the 2nd MGC verified the legitimacy 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.
Preferably, before said upper strata network element was initiated the register flow path of said MG, said the 2nd MGC carried out authentication to 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 replys error message to said MG, refuses said calling.
According to another aspect of the present invention; A kind of call processing system also is provided, has comprised: first media gateway controller MGC, the 2nd MGC and WMG MG, wherein; Said MG is used for after first media gateway controller MGC from its registration switches to the 2nd MGC, making a call; Said the 2nd MGC is used for initiating to the upper strata network element register flow path of said MG, and continues and put logical this calling.
Preferably, said the 2nd MGC also is used for before initiating the register flow path of said MG to said upper strata network element, the legitimacy of said MG being verified, and after checking is passed through, initiates the register flow path of said MG again to said upper strata network element.
Preferably, said the 2nd MGC also is used for before initiating the register flow path of said MG to said upper strata network element, said MG being carried out authentication, and after authentication is passed through, initiates the register flow path of said MG again to said upper strata network element.
Preferably; Said the 2nd MGC also was used for before initiating the register flow path of said MG to said upper strata network element; Determine 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 the 2nd MGC also is used for, and initiates to reply error message to said MG under the situation of register flow path of said MG to said upper strata network element confirming not, refuses said calling.
Through the present invention, adopt WMG MG to switch to the 2nd MGC from first media gateway controller MGC of its registration; Said MG makes a call; Said the 2nd MGC initiates the register flow path of said MG to the upper strata network element, and continues and put logical this calling.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 schematic flow sheet that the MGC switching takes place according to the IMS of correlation technique;
Fig. 4 is the schematic flow sheet of the call processing method of enforcement according to the present invention;
Fig. 5 is the flow chart of the call processing method under the flexible exchanging network framework according to the preferred embodiment of the invention;
Fig. 6 is the flow chart of the call processing method under the IMS network architecture 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).
In the present embodiment, a kind of call processing method is provided, Fig. 4 is the flow chart according to the call processing method of the embodiment of the invention, and is as shown in Figure 4, and this flow process comprises the steps:
Step S402, MG switches to the 2nd MGC from a MGC of its registration;
Step S404, MG makes a call;
Step S406, the 2nd MGC initiates the register flow path of this MG to the upper strata network element, and continues and put logical this calling.
Through above-mentioned steps, be not registered at MG under the situation of the 2nd MGC, the 2nd MGC initiates the register flow path of this MG and continues to put to have led to this calling to the upper strata network element, thereby has solved the problem of directly refusing calling in the prior art and causing producing call loss.
Preferably, when implementing,, can at the 2nd MGC before this upper strata network element is initiated the register flow path of this MG, the legitimacy of this MG be verified, and after checking is passed through, initiate the register flow path of this MG again to this upper strata network element in order to guarantee the legitimacy of MG.In addition, preferably, also can at the 2nd MGC before this upper strata network element is initiated the register flow path of this MG, carry out authentication, and after authentication is passed through, initiate the register flow path of this MG again to this upper strata network element this MG.Certainly, authentication can be carried out with the step of checking MG legitimacy together.
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 initiates the register flow path of this MG to this upper strata network element; The 2nd MGC determines whether that according to the strategy that is provided with in advance wherein, this strategy that is provided with in advance is used for confirming the MG of needs initiation register flow path to the register flow path of this MG of this upper strata network element initiation.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), then can confirm not to initiate under the situation of register flow path of this MG at the 2nd MGC to this upper strata network element; Reply error message to this MG, refusal should be called out.
A kind of call processing system also is provided in the present embodiment; Comprise: first media gateway controller MGC, the 2nd MGC and WMG MG; Wherein, this MG is used for after first media gateway controller MGC from its registration switches to the 2nd MGC, making a call; The 2nd MGC is used for initiating to the upper strata network element register flow path of this MG, and continues and put logical this calling.
Preferably, the 2nd MGC also is used for before initiating the register flow path of this MG to this upper strata network element, the legitimacy of this MG being verified, and after checking is passed through, initiates the register flow path of this MG again to this upper strata network element.
Preferably, the 2nd MGC also is used for before initiating the register flow path of this MG to this upper strata network element, this MG being carried out authentication, and after authentication is passed through, initiates the register flow path of this MG again to this upper strata network element.
Preferably; The 2nd MGC also was used for before initiating the register flow path of this MG to this upper strata network element; Determine whether that according to the strategy that is provided with in advance wherein, this strategy that is provided with in advance is used for confirming the MG of needs initiation register flow path to the register flow path of this MG of this upper strata network element initiation.
Preferably, the 2nd MGC also is used for, and initiates to reply error message to this MG under the situation of register flow path of this MG to this upper strata network element confirming not, and refusal should be called out.
Through said system, can efficiently solve the problem that disaster tolerance switches a large amount of call losses that produce afterwards takes place, reached the effect of the requirement of having satisfied the carrier class operation maintenance well.
Below in conjunction with Fig. 5 a preferred embodiment is described; This preferred embodiment can be applied under flexible exchanging network and the IMS network; Because flexible exchanging network MGC is an equipment (soft switch); Then be to involve a plurality of network equipments in the IMS network, therefore, handling process is not identical.Different according to the residing network architecture of MGC, its corresponding response situation also is different, and for example, flexible exchanging network, MGC are an equipment, can respond at once; The then corresponding a plurality of network entities of IMS network MGC need a plurality of asynchronous message interaction processes.Need to prove that this preferred embodiment is not limited to the situation that BAC inserts, and can omit BAC.Fig. 5 is the flow chart of the call processing method under the flexible exchanging network framework according to the preferred embodiment of the invention, and as shown in Figure 5, this flow process comprises the steps:
Step S501, MG registration (can be through the BAC registration, promptly MG can lose MGC1) to MGC1, belongs to MGC1;
Step S502, MG switches, belongs under the MGC2, if when inserting through BAC, concerning MG, the disaster tolerance change action of perception BAC not fully;
Step S503, MG makes a call;
Step S504, the legitimacy of MGC verification MG, and flow process such as authentication need to prove that the authentication here is optional execution mode, the identifying procedure that also can not be correlated with;
Step S505 passes through if go up the step, judges according to strategy whether needs get into the flow process that automatic connection is called out to this MG again;
Step S506 if step S504 and step S505 do not pass through, then directly replys ERROR to MG, and refusal should be called out, and need to prove that the processing mode here can adopt flow process of the prior art, repeats no more at this;
Step S507, if step S504 and step S505 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 S508 continues simultaneously and puts logical this calling, replys correct response to MG.
Through above-mentioned steps, can effectively solve BAC disaster tolerance switching, the problem of a large amount of call losses of generation take place.Arrived and reduced user's perception problems that the switching of BAC disaster tolerance causes, satisfied the effect of the requirement of carrier class operation maintenance well.
Fig. 6 is the flow chart of the call processing method under the IMS network architecture according to the preferred embodiment of the invention, in Fig. 6, is that example describes with AGCF, and as shown in Figure 6, this flow process comprises the steps:
Step S601, MG switch to new AGCF, need to prove, what the AGCF here realized is the effect of MGC, are responsible for legacy equipment MG is inserted the IMS network;
Step S602, MG makes a call;
Step S603, the legitimacy of MGC verification MG, and identifying procedure, the authentication here is optional execution mode, the identifying procedure that also can not be correlated with;
Step S604 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 S605 if step S603 and two steps of step S604 do not pass through, then directly replys ERROR to MG, then similar prior art flow process, and refusal should be called out; If step S603 and two steps of step S604 all 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 S606, (Call Session Control Function abbreviates CSCF as to CSCF; Comprise I/P/S-CSCF) initiate to register; Need to prove the similar Proxy Call Session Control Function of AGCF (Proxy-CSCF abbreviates P-CSCF as); So in this step, register to query CSCF (Interrogating-CSCF abbreviates I-CSCF as).Need to prove, a MG, down user maybe more than one for it, and a plurality of flow processs is similar, below is that example is elaborated with a user;
Step S607, I-CSCF is to home subscriber server (Home Subscriber Server abbreviates HSS as) searching for user relevance information;
Step S608, HSS returns user related information;
Step S609, I-CSCF selects the service call conversation control function (Service-CSCF abbreviates S-CSCF as) of ownership;
Step S610:I-CSCF is to the S-CSCF of ownership registration;
Step S611, S-CSCF carries out authentication to HSS, and preferably, this place is according to policy configurations, and is optional, if do not need then leap to step S620 to go on foot, but is not with authentication information, promptly do not need the register flow path of authentication;
Step S612 initiates authentication;
Step S613, because registration does not for the first time have authentication information, one this authentication registration failure, HSS returns failure;
Step S614, same S-CSCF returns registration failure message (promptly not passing through authentication) to I-CSCF;
Step S615, same I-CSCF returns registration failure message to AGCF;
Step S616, AGCF carry the authentication information registration once more;
Step S617, I-CSCF are once more to the HSS searching user's information;
Step S618, HSS returns user related information;
Step S619, I-CSCF choose the S-CSCF of ownership;
Step S620, I-CSCF is to the S-CSCF of ownership, and this carries authentication information;
Step S621, S-CSCF carries out the authentication registration to HSS;
Step S622, because this registration carries relevant authentication information, this authentication registration is passed through, HSS returns success;
Step S623, S-CSCF returns the message that succeeds in registration to I-CSCF;
Step S624, I-CSCF returns the message that succeeds in registration to AGCF;
Step S625, AGCF have returned to MG and have exhaled response message, and this calling normally continues.
In sum, through the foregoing description, solved the problem of switching a large amount of call losses that produce because of disaster tolerance, and then reduced call loss.
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 (10)
1. a call processing method is characterized in that, comprising:
WMG MG switches to the 2nd MGC from first media gateway controller MGC of its registration;
Said MG makes a call;
Said the 2nd MGC initiates the register flow path of said MG to the upper strata network element, and continues and put logical this calling.
2. 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 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.
3. 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 to 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.
4. 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.
5. according to each described method in the claim 2 to 4, 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 replys error message to said MG, refuses said calling.
6. call processing system comprises: first media gateway controller MGC, the 2nd MGC and WMG MG, it is characterized in that,
Said MG is used for after first media gateway controller MGC from its registration switches to the 2nd MGC, making a call;
Said the 2nd MGC is used for initiating to the upper strata network element register flow path of said MG, and continues and put logical this calling.
7. system according to claim 6 is characterized in that,
Said the 2nd MGC also is used for before initiating the register flow path of said MG to said upper strata network element, the legitimacy of said MG being verified, and after checking is passed through, initiates the register flow path of said MG again to said upper strata network element.
8. system according to claim 6 is characterized in that,
Said the 2nd MGC also is used for before initiating the register flow path of said MG to said upper strata network element, said MG being carried out authentication, and after authentication is passed through, initiates the register flow path of said MG again to said upper strata network element.
9. system according to claim 6 is characterized in that,
Said the 2nd MGC also was used for before initiating the register flow path of said MG to said upper strata network element; Determine whether to initiate the register flow path of said MG to said upper strata network element 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.
10. according to each described system in the claim 7 to 9, it is characterized in that,
Said the 2nd MGC also is used for, and initiates to reply error message to said MG under the situation of register flow path of said MG to said upper strata network element confirming not, refuses said calling.
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