CN1697528A - Evolution system and method of public switched telephone network - Google Patents
Evolution system and method of public switched telephone network Download PDFInfo
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- CN1697528A CN1697528A CN 200410044453 CN200410044453A CN1697528A CN 1697528 A CN1697528 A CN 1697528A CN 200410044453 CN200410044453 CN 200410044453 CN 200410044453 A CN200410044453 A CN 200410044453A CN 1697528 A CN1697528 A CN 1697528A
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- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
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- H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
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Abstract
The device and method reuses existed equipment and network resources as much as possible. Thus, the method possesses features of lower cost, higher reuse rate of exchanger and software, and reduced difficulties of engineering construction. Core of the system and method is as following: first, being modified to operation switching point, the exchanger in cross-office possesses function of operation switching; according to different condition, calls are triggered to relevant operation control point, where operation process is carried out; next, through data configuration, exchanger in cross-office forwards all operations to operation switching point in cross-office by using call forwarding function, without need of upgrading exchanger in cross-office; then, operating account center obtains operation information in use for charging from operation switching point.
Description
Technical field
The present invention relates to the communications field, particularly the public switched telephone network evolution technology.
Background technology
In present telecommunications miscellaneous service net, public switched telephone network (Public Switched Telephone Network based on carrying, control unification and circuit switching, be called for short " PSTN "), the fixedly speech that provides and other telecommunication services have the telecommunication user and the operation income of the overwhelming majority.The advantage of PSTN network is huge network infrastructure and huge number of users; Voice service quality (Qualityof Service is called for short " QoS ") is good; Professional abundant.
But along with the convergence of industrial circle, telephone network, computer network, cable television network are tending towards merging, and the pressure of network faces is increasing.The network faces load is in continuous increase, business demand also is tending towards variation, telecom operators must provide increasing multimedia service just can attract the user, under this its development, next generation network (Next Generation Network is called for short " NGN ") based on Softswitch technology arises at the historic moment.NGN is a milestone on the telecommunication history, and it belongs to a kind of comprehensive, open network architecture, and business such as speech, data and multimedia are provided.NGN can be on unified packet network business such as converged communication, information, ecommerce and transaction, satisfy variation, individual business demand, packet network is compared with the PSTN network, and more advantage is arranged: more effectively utilize bandwidth and equipment; Reduce the expense that speech transmits; The innovative service that can provide speech to combine with data.
No matter be NGN or 3G (Third Generation) Moblie (The Third Generation, be called for short " 3G ") network, in order to realize maximum professional extensibility, all on the basis of group technology, strive for business logic processing and medium processing are separated, promptly exchange with control and separate.But network is must be the pattern that adopts evolution: from the angle of telecom operators, must protect their telecommunications assets and existing telecommunication service to greatest extent; From user's angle, wishing increases simple, the cheap broadband services of certain operations again on the basis of their investment of protection and use habit.Therefore how NGN or 3G inherit the business of original PSTN network, and the Internet resources of how fully to reuse PSTN are the contents that must study.General popular several evolution models that have:
(1) integrated form model evolution
In the integrated form model, the key function member of NGN, such as multi-service access, broadband exchange, calling control, professional generation etc., all enter in the integrated service switchboard integrated, with the architecture of single switch, guarantee that current circuit-switched network evolves in the multiple service platform of NGN.
(2) distributed model evolution
Member by separation: the call/session control module, application server (Application Server is called for short " AS "), gateway, switch and router wait and constitute next generation network.
These two kinds of patterns are from the angle that realizes, what in the industry cycle widely approve at present is exactly second kind, but in the description of these two kinds of schemes, all lack consideration for the structure of present PSTN network, the PSTN network is in order to reduce network complexity, improve the utilance of network, the general pattern that all adopts multistage networking, substantially can be divided into (the Local Exchange of end office (EO), be called for short " LE ") and two kinds of tandem exchange'ss (TandemExchange, abbreviation " TE "), the capital equipment among LE and the TE all is traditional stored-program control exchange, wherein the stored-program control exchange of LE directly inserts subscribers feeder, and TE does not insert subscribers feeder, and as shown in Figure 1: the PSTN network is by tent center 10, service control point 11, tandem exchange 12, tandem exchange 13, end office (EO) 14, end office (EO) 15, end office (EO) 16, end office (EO) 17, end office (EO) 18, end office (EO) 19 constitutes.End office (EO) 14, end office (EO) 15, end office (EO) 16, end office (EO) 17, end office (EO) 18, end office (EO) 19 link to each other with two higher level tandem exchanges 12, tandem exchange 13 respectively, for the user provides C5 business, promptly towards the business that inserts the user, the business directly related with user terminal; Interconnected service convergence and C4 class business, the i.e. business of relaying and convergent type of providing between tandem exchange 12, the tandem exchange 13; Tent center 10 (Billing Cneter) needs to link to each other with all end office (EO)s with tandem exchange 12, tandem exchange 13, to obtain enough charge informations; Service control point 11 (Service ControlPoint, be called for short " SCP ") can follow tandem exchange 12, tandem exchange 13 to link to each other, also directly heel end office links to each other, need to prove, SCP is meant the control point of the communication protocol business of supporting senior telephone service and intelligent network in the world, i.e. the service control point of No.7 signalling system, the control element that defines in the SCP intelligent network, its function generally is that the database how to handle is called out in decision, and the control logic of IN service is provided.
A kind of evolution mode commonly used at present is the evolution pattern of separating.
Basic network figure after this evolution pattern is finished as shown in Figure 2, by tent center 20, service control point 21, controlled entity 22, media gateway (Media Gateway is called for short " MG ") 23, media gateway 24, media gateway 25, media gateway 26, media gateway 27, media gateway 28, media gateway 29 constitute.
Wherein, media gateway 25, media gateway 26, media gateway 27, media gateway 28, media gateway 29 link to each other with two higher level's media gateway 23, media gateway 24 respectively, for the user provide C5 professional or other, the business directly related with user terminal.
Media gateway 23, media gateway 24 have replaced the function of tandem exchange 12, tandem exchange 13 among Fig. 1.
Need to prove, controlled entity 22 (Call Server) is the equipment on the logical meaning, sometimes also become Media Gateway Controller (Media Gateway Control, be called for short " MGC "), media gateway 23, media gateway 24, media gateway 25, media gateway 26, media gateway 27, media gateway 28, the action of media gateway 29 is all according to the command execution of controlled entity 22, the controlled entity 22 main media gateway 23 of paying close attention to, the C4 class business of media gateway 24, and pay close attention to media gateway 25, media gateway 26, media gateway 27, media gateway 28,29 of media gateway mainly are C5 class business.At the network evolution initial stage, controlled entity 22 may be divided into two according to paying close attention to professional difference, and in the network evolution process, these two controlled entities can be merged into one, and control various types of media gateway gets final product.
Tent center 20 needs controlled entity 22 to link to each other with all media gateway, to obtain enough charge informations.
Service control point 21 only needs to link to each other with controlled entity 22 in this network, and the control logic of IN service is provided.
In this evolution pattern, adopt LE and the TE pattern of evolution respectively, for LE, the controlled function and the function of exchange of LE switch are separated, promptly the traditional stored-program control exchange in all end office (EO)s among Fig. 1 is developed into a simple switching node, promptly become a media gateway, all actions are according to the command execution of isolated controlled entity 22, and are also finished by controlled entity for the interface of IN service; Also the same substantially for TE, the traditional stored-program control exchange in all tandem exchanges among Fig. 1 is developed into a simple switching node, promptly become a media gateway, be that isolated controlled entity has mainly been paid close attention to C4 class business.
Under this evolution pattern, traditional stored-program control exchange of TE and LE all needs to upgrade, become the media gateway of finishing the function of circuit switching and forwarding in the above on the basis of only ordering, as for up media interface, can keep traditional time division multiplexing (Time Division Multiplexing, be called for short " TDM ") interface, also can directly be evolved to the gateway of supporting packet interface.
Though almost settling at one go, aforesaid way realized that control separates with exchange, adopt Call Server as unified operation controlling entity, for from now on expansion provides an extraordinary platform, still, if consider present network condition, following shortcoming has just appearred:
1) this evolution pattern requires all traditional stored-program control exchanges are upgraded, and cost is higher;
2) a lot of traditional stored-program control exchanges then must directly be replaced because many-sided historical reasons such as technology of production firm and employing can't be upgraded, and the rate of reusing is not high;
3) the software overwhelming majority in traditional stored-program control exchange is all die on.
Generally speaking, this scheme is exactly that requirement telecom operators replace to new equipment to all the stored-program control exchange node devices on the former PSTN network immediately, be equivalent to set up a new business net, very big to the impact of telecom operators' existing network, risk is big too.
Fig. 3 illustrates another evolution pattern--the evolution pattern of intelligent network.Basic network tent center 30 after this evolution pattern is finished, service control point 31, Service Switching Point 32, Service Switching Point 33, Service Switching Point 34, Service Switching Point 35, Service Switching Point 36, Service Switching Point 37, Service Switching Point 38 constitute.
Wherein, Service Switching Point 34, Service Switching Point 35, Service Switching Point 36, Service Switching Point 37, Service Switching Point 38 link to each other with two higher level's Service Switching Points 32, Service Switching Point 33 respectively, for the user provide C5 professional or other, the business directly related with user terminal.
Under this evolution pattern, LE and TE are according to the evolution pattern of intelligent network, this evolution is not to adopt will controlling and exchanging directly of describing in the technical scheme 1 to separate fully, but utilized the solution of traditional intelligence net, by transforming the traditional stored-program control exchange among LE and the TE, make its all node can both have Service Switching Point (Service Switch Point, be called for short " SSP ") ability, so all business are triggered to service control point 31 according to multiple condition and carry out Business Processing, service control point 31 has then become the service logic of Fig. 3 network and has carried out point.Under this evolution pattern, can make full use of existing Internet resources on the one hand and realize that business provides platform more flexibly; On the other hand, also guarantee following better and NGN or 3G fusion faculty, be equivalent to the business of concentrating in traditional stored-program control exchange is peeled off away from switch, only kept basic controlled function and function of exchange; And service control point 31 also can develop the parts in the service layer that becomes in the future network in the evolution in future.
Under this evolution pattern, traditional stored-program control exchange of TE and LE all needs to upgrade and supports SSP, finish basic control and function of exchange, do not have service logic capabilities, as for up media interface, can keep traditional TDM interface, but need support by agreement and SCP alternately to realize business.
Consider present network condition, there is following problem in such scheme:
1) this evolution pattern requires all switches are upgraded, and cost is higher;
2) the expense height of Gai Zaoing: existing network type complexity, One's name is legion partly must carry out upgrading, even some old type weak tendency type upgrading also is difficult to support;
3) collection expense height: need realize the butt joint of online charging to numerous switch systems, because the problem of the quantity of switch, type, software version makes cost of investment and technical difficulty become great barrier.
4) engineering construction difficulty: to from many different manufacturers, different model, version switch advance the whole network engineering, and the cycle is longer, and the engineering construction difficulty is big.
Generally speaking, this scheme requires telecom operators immediately all stored-program control exchanges on the former PSTN network to be carried out the software and hardware upgrading equally, and too high to the transformation requirement of telecom operators' existing network equally, risk is also than higher.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of public switched telephone network evolution system and method thereof, make and to reuse existing device and Internet resources as much as possible, thereby cost is lower, the rate of reusing of switch and software thereof is higher, engineering agent difficulty reduces relatively.
For achieving the above object, the invention provides a kind of public switched telephone network evolution system, comprise a plurality of end office (EO)s, at least one Service Switching Point, at least one service control point, tent center, wherein
Described end office (EO) is used for all business are forwarded to described Service Switching Point;
Described Service Switching Point is used to receive the business from described end office (EO), and according to predetermined condition, the calling of described business is triggered to corresponding described service control point, and sends the business information that is used to charge to described tent center;
Described service control point is used to handle the business from described Service Switching Point;
Described tent center is used for according to chargeing from the business information of described Service Switching Point.
Wherein, described Service Switching Point is also supported packet interface and agreement, and described system also comprises by described packet interface and agreement and the application server that described Service Switching Point is connected, and is used to handle the business from described Service Switching Point.
Described end office (EO) utilizes the call forward ability of switch, by data configuration all business is forwarded to described Service Switching Point.
The function intersection of described a plurality of service control points comprises all service processing function of end office (EO) and tandem exchange in the public switched telephone network.
The present invention also provides a kind of public switched telephone network evolution method, comprises following steps:
A end office (EO) is forwarded to Service Switching Point with all business;
The described Service Switching Point of B receives described business, and according to predetermined condition, the calling of described business is triggered to the corresponding service control point, and sends the business information that is used to charge to the tent center;
The described service control point of C is handled the business from described Service Switching Point;
The described tent of D center is according to chargeing from the business information of described Service Switching Point.
Wherein, in the described steps A, described local side utilizes the call forward ability of exchange, by data configuration, realizes the forwarding of all business.
Described step B also comprises following substep:
Judge whether described business is the platform processes business of need activating business, if then described business is forwarded to application server and handles.
By relatively finding, technical scheme difference with the prior art of the present invention is, at first, transform the switch of tandem exchange as Service Switching Point, make it have Service Switching Function, and can calling be triggered to the corresponding service control point according to different conditions and carry out Business Processing; Secondly, do not need opposite end office's switch to upgrade, only need utilize its call forwarding feature all business to be forwarded to Service Switching Point in the tandem exchange by data configuration; Once more, the tent center only need obtain the business information that is used to charge from Service Switching Point.
Difference on this technical scheme has brought comparatively significantly beneficial effect.The first, owing to do not need a fairly large number of end office (EO) is transformed, therefore saved the upgrade cost of end office switch, reduced the evolution cost of PSTN integral body;
The second, therefore the business datum that the tent center only is used to charge from the Service Switching Point collection has simplified the data acquisition cost in the charging process;
The 3rd, because only need transform tandem exchange as Service Switching Point, so quantities is less, evolution scheme is safer, does not need to consider complicated end office's equipment situation, need not once replace on a large scale and upgrade.
Description of drawings
Fig. 1 is the basic networking structure schematic diagram of PSTN network;
Fig. 2 is the evolution pattern diagram of separation of the prior art;
Fig. 3 is the evolution pattern diagram of intelligent network of the prior art;
Fig. 4 is the system assumption diagram of the intelligent network on the PSTN network foundation;
Fig. 5 is the evolution pattern diagram of tandem exchange according to an embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer,, describe the basic service transfer capability utilize in traditional stored-program control exchange and the transformation of tandem exchange in detail and realize an evolution scheme that risk is less below according to principle of the present invention.And emphasis is set forth core content of the present invention: tandem exchange's evolution, the evolution of tent center, service control point evolution.
Because the present invention with reference to intelligent network evolution mode, therefore describes the intelligent network situation on the PSTN basis in the TE part earlier.
As shown in Figure 4, according to China's intelligent network system regulation, the intelligent network of China adopts the network system based on SSP.In net, disposed service creation environment 40, service management access device 41, service management point 42, service control point 43, Service Switching Point 44, and formed national intelligent network by the Signaling System Number 7 net.Service creation environment 40 major functions wherein are to generate intelligent network business, provide one can define, the environment of development﹠ testing intelligent network business, and configuration, the functions such as operation of artificial service software in network of analog network are provided, it is top to occupy intelligent network architecture logic.And service management access device 41, service management point 42 belong to business management system, the two constitutes an aspect, it is the business management system aspect, be responsible for intelligent network and intelligent network business are managed, it comprises management to business, to the management of service-user, to Network Management, to the functions such as management that service management access and system insert, in intelligent network architecture logical level, occupy the second layer.Service control point 43 plays a part control and handles IN service in whole intelligent net system, it finishes service control function (Service Control Function, be called for short " SCF ") and service data function (Service Date Function, be called for short " SDF "), the management system of accepting business simultaneously occupy three layers of intelligent network logical layer order to its management.Service Switching Point 44 is mainly finished Service Switching Function and CCF, when Service Switching Point 44 is local switch, also has Call Control Access Function, and comprehensive Service Switching Point 44 also comprises the special resource function of part.
Fig. 5 illustrates the basic network figure after evolution pattern according to an embodiment of the invention is finished.As shown in the figure, this system is made of an independent tent center 50 and three aspects, i.e. operation layer 51, convergence layer 52, Access Layer 53.Wherein, operation layer 51 is made of service control point 510 and application server 511, and convergence layer 52 is made of Service Switching Point 520, Service Switching Point 521.And Access Layer 53 then is to be made of a large amount of end office (EO)s, represents numerous end office (EO)s with end office (EO) 530, end office (EO) 531, end office (EO) 532, end office (EO) 533, end office (EO) 534, end office (EO) 535 among Fig. 5, and the capital equipment in each end office (EO) is traditional stored-program control exchange.
In general, this programme only carries out evolution to the node of three parts, the i.e. node device that only needs evolution tent center 50, operation layer 51,52 3 parts of convergence layer to comprise, and traditional stored-program control exchange that each end office (EO) maximum to quantity in the former PSTN network, that invest the Access Layer 53 of maximum, different manufacturers, different model, different editions comprises is not done big transformation, and just utilize basic service transfer capability in the conventional switch, the evolution risk control to minimum.
Set forth the evolution situation of different piece below generally.
In the evolution pattern, the interface modes at tent center 50 and original PSTN network have had a great difference, and be also different with above-mentioned two kinds of prior art schemes.Comparison diagram 5 just can significantly be reached a conclusion with Fig. 1, Fig. 2, Fig. 3: tent center 50 is after evolution, do not need all end office's interfaces with Access Layer 53, get final product and only need collect relevant charge information from the position of former tandem exchange, be Service Switching Point 520, the Service Switching Point 521 of convergence layer 52 among Fig. 5, the tent center only changes the source of information gathering, and function does not need to change.
Next the evolution situation of operation layer 51 is described: in the evolution pattern, in original PSTN network, operation layer 51 these aspects are not proposed separately, because initial PSTN network is professional fairly simple single, just has only speech business, stored-program control exchange also only provides the basic call control of No.7 signalling system in the former PSTN network, does not need to propose separately an aspect.
But along with the continuous evolution of PSTN, advanced call control that independent data network provides for telephone network and the intelligent network system that strengthens business function have occurred on the PSTN basis, utilizing, need to prove that the independent data network here refers to the Signaling System Number 7 net.The basic thought of intelligent network is that function of exchange and controlled function are separated, and simplifies the software of switch, makes it only to finish the basic function that continues.The intelligent network architecture allows the service provider to create service logic program, improves the call function of PSTN.The functional architecture of intelligent network is defined as in international standard by a series of function moulds that a plurality of distributed functions are formed entity of determining.On the defined distributed functional plane of intelligent network protocol, SCF separates with operation exchange ability (Service Switch Functions is called for short " SSF ") and connection control function (Connect ControlFunction is called for short " CCF ").SSF that is provided by Service Switching Point 520 and Service Switching Point 521 and CCF function are supported the basic call processing procedure of voice service.The SCF function provides the centralized service control logic for higher level service, provide as SSF by service control point 510 and to detect the basic call processing events, it just instructs with the SCF negotiation, and promptly Service Switching Point 520 or Service Switching Point 521 exchange with service control point 510 signalings.The SSF that SCF on the service control point 510 is responsible on service guidance exchange point 520 or the Service Switching Point 521 is connected with supporting with CCF foundation calling.In business, management and the control structure of intelligent network, also defined support function.In addition, SDF allows business datum to separate from professional control logic, and in many practical applications, SCF and part SDF function often are integrated in the service control point 510.At original PSTN network the such network element structure of service control point 510 has appearred promptly.
Along with the rise of NGN, business logic processing and medium are handled and are separated, i.e. exchange is more outstanding with the control separating thought.The task that service control point 510 these aspects are undertaken also will increase, complexity is higher, need replace service control point 510 with node device with better function, can make network layer more clear, be convenient to the division of each aspect function so propose a new service layer.
So in the evolution pattern; capacity variation for service control point 510 also is a protection point: service control point 510 need have been born the module of level and smooth professional evolution in evolution process; progressively carry out the transition to the application server that will replace them 511 in the NGN network, this module also may directly evolve to application server 511 and finishes certainly.In the evolution pattern of this division, operation layer 51 can be to be made of the service control point 510 after original SCP is improved, and also can directly provide professional by the application server in NGN or the 3G network 511.
The evolution situation of convergence layer 52 is described then:
The evolution of convergence layer 52, key are the transformation to the traditional stored-program control exchange among the TE.
Traditional stored-program control exchange in the PSTN net promptly includes access function, CCF, function of exchange, business function, signaling capability etc. in the circuit switching exchange at present.These functions all are incorporated in the single switch, are a kind of vertical integrated, sealing and system configurations special use of single producer.And circuit switching exchange is based on circuit-switched technology, has some fatal weakness, and bandwidth availability ratio is low.And the NGN of substituting PS TN network has adopted on the basis of group technology, strive for business logic processing and medium processing are separated, promptly exchange and control the mode of separating, on the control aspect, adopt MGC to serve as various control tasks, MGC has broken traditional sealing switching fabric, adopts the pattern of diverse horizontal combination, and each function interface of switch is opened, adopt open interface and general agreement, constitute a system configuration opening, that distribute, that many producers use.Adopt IP network layer in return simultaneously, realize the exchange of " soft ".The function of comparison circuit switch and Media Gateway Controller as can be seen, in the function that Media Gateway Controller should possess, having many is that the software of present circuit switching exchange can provide, so just might be by function to circuit switching exchange, software particularly, carry out structure again, realize the function that MGC should provide.As by software control, the CCF in the circuit switching exchange can be reduced to basic, with the CCF of independent of service.And for example signaling capability has signaling capability in the circuit switching exchange at present, equally can be used for MGC.Other functions also can realize by the mode of revising software as functions such as charging, resource control, black and white lists, calling authorizations.
Each control among the NGN can be found corresponding functional entity with administrative unit in intelligent network: professional control, support function provide value added service, corresponding to the SCF of intelligent network; Professional machining functions is responsible for setting up element, corresponding to the SCF and the SDF of intelligent network; Conversation management functional, be in charge of access, the service provide, communicate to connect, corresponding to the SSF of intelligent network; The connection management function is responsible for providing connection between packet network and Interworking GateWay, corresponding to the CCF of intelligent network; The interconnection management function is in charge of the intercommunication with existing PSTN business structure, comprises the triggering of managing intelligent network and the control of low layer gateway device, corresponding to the SSF and the CCF of intelligent network.
Exist corresponding relation from NGN and intelligent network, those of ordinary skill in the art are appreciated that by transforming circuit switching exchange and realize that the MGC partial function is feasible.Traditional stored-program control exchange functional characteristic of upgrading so among the TE makes it have SSF, and it also is feasible becoming SSP, and the business that is about to concentrate in traditional stored-program control exchange among the TE is peeled off away from switch, only keeps basic controlled function and function of exchange; And being separated the service control point 510 that is put in the operation layer 51, more complicated processing finishes.Need to prove, be exactly to adopt this mode in the evolution of intelligent network, and each traditional stored-program control exchange is escalated into SSP, provides various new business being engaged in PSTN by SSP and SCP.
In this programme; this kind that need protection drilled new progressive die formula: by the transformation of original traditional stored-program control exchange in the tandem exchange being finished the evolution of initial stage PSTN; transform pattern makes it have SSF for its functional characteristic of upgrading; become Service Switching Point 520, Service Switching Point 521 by original simple programme-controlled exchange node; and can realize by agreement and intelligent network SCP intercommunication professional, promptly with operation layer 51 in service control point 510 intercommunications.Perhaps also can directly provide professional by the application server in NGN or the 3G network 511.
The evolution situation of Access Layer 53 is described at last:
Compare with above-mentioned two kinds of prior art schemes, in this programme, the basic of this aspect do not changed, and compares the work of almost just doing seldom with tandem exchange evolution, the evolution of tent center, service control point evolution.It mainly is exactly the basic service transfer capability of having utilized in end office's tradition stored-program control exchange, end office (EO) 530, end office (EO) 531, end office (EO) 532, end office (EO) 533, end office (EO) 534,535 needs of end office (EO) are done data, and all traffics are delivered to Service Switching Point 520, Service Switching Point 521 in the convergence layer 52.
More than the branch various piece has been introduced the evolution situation in this programme, as an overall solution, also needs to introduce the concrete basic evolution pattern of whole evolution process in conjunction with Fig. 5:
At first, end office (EO) 530, end office (EO) 531, end office (EO) 532, end office (EO) 533, end office (EO) 534, end office's 535 all business all are forwarded to higher level TE by data configuration, the tandem exchange that is Service Switching Point 520 among Fig. 5, Service Switching Point 521 places handles, the software of traditional stored-program control exchange of these end office (EO)s remains unchanged substantially like this, only need utilize its call forward ability to get final product.
Then, transform the traditional stored-program control exchange among the convergence layer TE, make it become Service Switching Point 520 and Service Switching Point 521 with SSF, can calling be triggered to corresponding SCP according to different condition such as calling number, called number or type of service and carry out Business Processing, be i.e. service control point among Fig. 5 510.Need to prove, above process can also be described in detail: Service Switching Point 520 and Service Switching Point 521 need be set up some Detection Points and control point in call handling process, Detection Point can be reported the variety of event that takes place in the calling procedure to service control point 510, and the further control command at latency services control point 510.The control command that Service Switching Point 520 and Service Switching Point 521 are then accepted business control point 510 realizes the control to calling procedure.
Subsequently, the traditional business that the service control point 510 in the operation layer 51 needs all end office (EO)s of realization and tandem exchange to finish is to realize level and smooth professional evolution; Certainly, if tandem exchange has directly supported some packet interfaces and agreement, also can directly provide professional by the AS in NGN or the 3G network, promptly the application server 511 in the operation layer 51 provides professional;
After this, because all business all are forwarded to former end office (EO) position, therefore tent center 50 also only needs to carry out interface with new SSP node and get final product, and promptly the interface at tent center 50 only need be wanted to be connected and just can extract required data and carry out the tent processing with Service Switching Point 520, Service Switching Point 521 in the convergence layer 52.
At last, SCP can smoothly incorporate business platform in the future, can seamlessly transit.It is the service control point 510 in the operation layer 51 among Fig. 5, in evolution, no longer become a logic entity on traditional stored-program control exchange, but incorporate service layer, because this moment, conventional switch has evolved to each functional units such as MG, MGC and SGW, so the SCP controlled function can further be substituted by MGC, operation layer 51 will all be made of AS, and intelligent network business also can incorporate in the NGN network.
More than set forth as can be seen, in this programme, the transformation that makes full use of basic service transfer capability in the conventional switch and tandem exchange has realized the evolution of traditional PSTN network.Various the old and new's business that the end user enjoys will be provided support by the intelligent network of convergence layer SSP after the evolution and operation layer SCP, and perhaps convergence layer SSP and operation layer AS form the hybrid network that intelligent network mixes with NGN and provide support.
Those of ordinary skill in the art can know, so that a basic telecommunications business-nobody replys forward-shifting service, this business is the solution that is transferred to other numbers when solving called subscriber busy, and it provides a kind of when leaving the seat for the user, still the service that can handle incoming call.This new business can be provided by the pure NGN network that MG and MGC constitute, and also can provide by the network after the evolution of the present invention.Being implemented as follows in this evolution scheme:
At first, it utilizes the SSP of Service Switching Point 520 in Fig. 5 network or Service Switching Point 521 to trigger.When the called subscriber has registered this business, and when being called out overtime ring unanswered, this business is activated, and at this moment because possess the SSF function through the tradition stored-program control exchange of the TE tandem exchange after the upgrading, can directly trigger nobody and reply forward-shifting service;
Next, the Detection Point of Service Switching Point 520 or Service Switching Point 521 can be reported the also further control command at latency services control point 510 to service control point 510 with the present event that takes place in the calling procedure.
Then, because on service control point 510, increase correspondent service logic, promptly for unmanned answering call forward-shifting service, SCP only need with call proceeding to user's number of registering in advance get final product, so service control point 510 part is as to this reacted, send control command to Service Switching Point 520 or Service Switching Point 521.
At last, the accept business control command at control point 510 of Service Switching Point 520 and Service Switching Point 521 makes a call according to the number of control command to registration in advance, finishes this time professional.
Concerning the end user; the business that these the old and new pure NGN network professional and that constitute with MG and MGC can provide is used and is gone up without any difference; so this evolution scheme can be in quite long period competent diverse network business, reached smooth evolution, as much as possiblely reused existing device and Internet resources, protection telecommunications operator investment, at utmost avoided the purpose of evolution risk.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (7)
1. a public switched telephone network evolution system is characterized in that, comprises tent center, a plurality of end office (EO), at least one Service Switching Point and at least one service control point, wherein
Described end office (EO) is used for all business are forwarded to described Service Switching Point;
Described Service Switching Point is used to receive the business from described end office (EO), and according to predetermined condition, the calling of described business is triggered to corresponding described service control point, and sends the business information that is used to charge to described tent center;
Described service control point is used to handle the business from described Service Switching Point;
Described tent center is used for according to chargeing from the business information of described Service Switching Point.
2. public switched telephone network evolution system according to claim 1, it is characterized in that, described Service Switching Point is also supported packet interface and agreement, and, described system also comprises by described packet interface and agreement, with the application server that described Service Switching Point is connected, be used to handle business from described Service Switching Point.
3. public switched telephone network evolution system according to claim 1 is characterized in that, described end office (EO) utilizes the call forward ability of switch, by data configuration all business is forwarded to described Service Switching Point.
4. public switched telephone network evolution system according to claim 1 is characterized in that, the function intersection of described a plurality of service control points comprises all service processing function of end office (EO) and tandem exchange in the public switched telephone network.
5. a public switched telephone network evolution method is characterized in that, comprises following steps:
A end office (EO) is forwarded to Service Switching Point with all business;
The described Service Switching Point of B receives described business, and according to predetermined condition, the calling of described business is triggered to the corresponding service control point, and sends the business information that is used to charge to the tent center;
The described service control point of C is handled the business from described Service Switching Point;
The described tent of D center is according to chargeing from the business information of described Service Switching Point.
6. public switched telephone network evolution method according to claim 5 is characterized in that, in the described steps A, described local side utilizes the call forward ability of exchange, by data configuration, realizes the forwarding of all business.
7. public switched telephone network evolution method according to claim 5 is characterized in that, described step B also comprises following substep:
Judge whether described business is the platform processes business of need activating business, if then described business is forwarded to application server and handles.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100444530A CN1311694C (en) | 2004-05-10 | 2004-05-10 | Evolution system and method of public switched telephone network |
| BRPI0510949-3A BRPI0510949A (en) | 2004-05-10 | 2005-05-08 | evolutionary public switched telephone network system and service processing method thereof |
| RU2006142728/09A RU2336649C1 (en) | 2004-05-10 | 2005-05-08 | Developing system of commuted public switched telephone network and method of service processing in this network |
| PCT/CN2005/000633 WO2005109777A1 (en) | 2004-05-10 | 2005-05-08 | The evolution system of the public switched telephone network and the service process method of the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100444530A CN1311694C (en) | 2004-05-10 | 2004-05-10 | Evolution system and method of public switched telephone network |
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| Publication Number | Publication Date |
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| CN1697528A true CN1697528A (en) | 2005-11-16 |
| CN1311694C CN1311694C (en) | 2007-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100444530A Expired - Lifetime CN1311694C (en) | 2004-05-10 | 2004-05-10 | Evolution system and method of public switched telephone network |
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| Country | Link |
|---|---|
| CN (1) | CN1311694C (en) |
| BR (1) | BRPI0510949A (en) |
| RU (1) | RU2336649C1 (en) |
| WO (1) | WO2005109777A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007076710A1 (en) * | 2005-12-30 | 2007-07-12 | Huawei Technologies Co., Ltd. | Method and device for traffic statistics |
| CN101262535B (en) * | 2008-04-11 | 2011-02-16 | 华为技术有限公司 | Call billing method, system, device and equipment |
| CN103716337A (en) * | 2012-09-29 | 2014-04-09 | 中国银联股份有限公司 | Cloud computing network system and data processing method therein |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895849A (en) * | 2009-05-19 | 2010-11-24 | 华为技术有限公司 | Service processing method, communication system and associated equipment |
| CN101902824B (en) * | 2009-05-31 | 2012-11-07 | 华为技术有限公司 | Local switch implementation method, mobile switch centre and communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09130476A (en) * | 1995-10-30 | 1997-05-16 | Nec Corp | Connection processing method to plural terminal users and device therefor |
| US6327258B1 (en) * | 1996-04-04 | 2001-12-04 | Alcatel Usa Sourcing, L.P. | Method and apparatus for routing internet calls |
| DE19814162A1 (en) * | 1998-03-30 | 1999-10-07 | Siemens Ag | Method and service switching unit for requesting information on incoming calls directed to a subscriber of a communication network |
| US6570973B1 (en) * | 2000-03-31 | 2003-05-27 | Bellsouth Intellectual Property Corporation | System and method for toll notification when placing a call |
| CN1130896C (en) * | 2000-06-13 | 2003-12-10 | 深圳市冠日通讯科技有限公司 | Intelligent public telephone system and its communication method |
| CN1174601C (en) * | 2000-09-19 | 2004-11-03 | 华为技术有限公司 | Method and system for implementing intelligent public telephone service |
| KR20030097259A (en) * | 2002-06-20 | 2003-12-31 | 주식회사 케이티 | Charging method and apparatus for incomming trunk to the local switch using Intelligent Network |
-
2004
- 2004-05-10 CN CNB2004100444530A patent/CN1311694C/en not_active Expired - Lifetime
-
2005
- 2005-05-08 BR BRPI0510949-3A patent/BRPI0510949A/en not_active Application Discontinuation
- 2005-05-08 WO PCT/CN2005/000633 patent/WO2005109777A1/en active Application Filing
- 2005-05-08 RU RU2006142728/09A patent/RU2336649C1/en active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007076710A1 (en) * | 2005-12-30 | 2007-07-12 | Huawei Technologies Co., Ltd. | Method and device for traffic statistics |
| CN101262535B (en) * | 2008-04-11 | 2011-02-16 | 华为技术有限公司 | Call billing method, system, device and equipment |
| CN103716337A (en) * | 2012-09-29 | 2014-04-09 | 中国银联股份有限公司 | Cloud computing network system and data processing method therein |
| CN103716337B (en) * | 2012-09-29 | 2016-12-21 | 中国银联股份有限公司 | The method that system for cloud computing system and wherein data process |
Also Published As
| Publication number | Publication date |
|---|---|
| BRPI0510949A (en) | 2007-11-20 |
| RU2336649C1 (en) | 2008-10-20 |
| WO2005109777A1 (en) | 2005-11-17 |
| RU2006142728A (en) | 2008-06-20 |
| CN1311694C (en) | 2007-04-18 |
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