CN100421435C - Gateway for next-generation network, dynamic extending, and open interface technology - Google Patents
Gateway for next-generation network, dynamic extending, and open interface technology Download PDFInfo
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Abstract
The present invention relates to a dynamic expandable Parlay/OSA gateway of open interface technique for next generation network, which is composed of a flexible bus, a configuration management unit, an SCF unit, a TCAP class protocol mapping unit, a non TCAP class protocol mapping unit, an operation maintenance unit and a network management unit, wherein the flexible bus is a public correspondence channel of each unit /assembly, which can shield the difference between a heterogeneous application system and a heterogeneous network system to enable the gateway to be deployed in an actual network environment rapidly to obtain popularization and application. A control center-configuration management unit executes register/cancel mechanism of assemblies to make the gateway introduce a new SCF assembly and a protocol mapping assembly dynamically in plug and play mode, or start up process instance of the new assembly, and also realize load balancing. When the protocol mapping unit replaces protocol stacks, only partial codes in a protocol adaptation layer needs to be modified, and codes of an SCF assembly does not need to be modified. The present invention is favorable to the expansibility of the gateway.
Description
Technical field
The present invention relates to a kind of gateway that is used for next generation network NGN (Next Generation Network), exactly, but relate to Parlay/OSA gateway a kind of dynamic expansion, open interface technology, belong to the information processor technical field in the communication network
Background technology
In the initial many decades that telecommunications network is born, main control hardware and software are all concentrated and are arranged in the switch, if a kind of new business is provided, even business is made small modification, all will change all switches in the network, the cost of paying is very expensive.
The nineties in 20th century, the intelligent network standard of ITU-T proposes the thought that professional control separates with network control first, top-down 4 planar structures of carrying out Function Decomposition have been defined, the employing business independently makes up module SIB (Service Independent Building Block) and realizes software reuse, can create new value-added service fast.Based on the signalling system No.7 agreement of widespread deployment, successfully set up the IN service architecture of PSTN/ISDN/PLMN Circuit Switching Network, and released a series of new business, won huge market, for operator has brought abundant profit.
20 th century later, the development of telecommunications industry have entered a new period: network capacity is maked rapid progress, and to the packet switching transition, business is to multimedization, broadband, individualized development from circuit switching for exchanged form.Though intelligent network has been obtained very ten-strike in the conventional telecommunications net, yet it still is a closed system, professional control and service creation environment can only be grasped and be developed by Virtual network operator, the control mode that is adopted remains the traditional focus control mode of telecommunications network, the signaling of using also remains based on Circuit-switched signalling system No.7, can not adapt to the development trend of service integration, technological incorporation, IP packetizing and the network intelligence distribution of next generation network.Therefore, the model that next generation network NGN proposition network control and service operation are separated, the network function API API (ApplicationProgramming Interface) of some standards is provided by Virtual network operator, independently network provider SP can utilize these interfaces to provide personalized business to the user, and is participated in the profits by Virtual network operator and service provider.Like this, just can form by the open value chain that constitutes in many ways, each participant provides and uses business jointly, the common benefit.
At present, the most influential API develops jointly ParlayAPI by mainly communicate by letter manufacturer and operator of various countries.In March, 1998, Parlay working group unites establishment by BT, Ulticom, Microsoft, Nortel and Seimens five companies, how main research supports the network interface specification of applications secure access network internal resource, to widen the intelligent scope of network, impel third party's service provider or telecom operators based on this interface platform, adopt different technologies exploitation communication products and communication service is provided on wireless, Internet or public switched network, be the specific quick customized personal business of customer group simultaneously, with replenishing as general business.The focus of Parlay working group is to formulate the API standard, but do not comprise how realizing API, the application based on API, bottom-layer network software, physical feature and physical interface.The Parlay tissue actively encourages telecommunications and IT industry circle to do design and the realization of the as a whole API of participation for this reason.The tool authority's of european telecommunication circle two big standardization bodies: the support technology that ETSI of ETSI and the 3rd third-generation mobile communication partner program 3GPP adopt Parlay to provide as NGN and 3G network business, 3GPP has proposed open business structure OSA in view of the above.Therefore, often this API standards system is called Parlay/OSA.
Now, the application architecture that briefly introduces Parlay/OSA earlier and conceived: the client of Parlay/OSA is the application server that is provided by third party's service provider or Virtual network operator, is used to develop various new business and offers the terminal use and use.The Parlay/OSA gateway can enter in each communication network the business of Parlay/OSA client for the Parlay/OSA client provides the support of various basic service abilities controlledly, safely.At present, existing P arlay/OSA gateway is provided by each Virtual network operator, because Parlay does not also have the resource interface of regulation and each bottom-layer network, so temporarily can only move between Parlay/OSA gateway and each communication network by Virtual network operator oneself and set internal communication protocol using, API is mapped to lower layer network as adopting JAIN, INAP, SIP.The Parlay/OSA gateway client then is by calling Parlay APIs visit Parlay/OSA gateway, and the general distribution object technology such as CORBA that adopts communicates between them.
Though the Parlay/OSA regulation and stipulation whole Service Capability Feature SCF (Service CapabilityFeature) and agreement mapping ruler, but, for how realizing SCF, how realizing how all not making any regulation and suggestion alternately between agreement mapping, SCF assembly and the agreement map component, therefore, the gateway of a kind of Parlay/OSA of meeting standard of research and development has become those skilled in the art technical problem of being badly in need of solving.
Summary of the invention
In view of this, but the purpose of this invention is to provide a kind of next generation network NGN Parlay/OSA gateway dynamic expansion, open interface technology that is used for, for the business development of next generation network provides a powerful technology platform.
In order to achieve the above object, but the invention provides a kind of next generation network NGN Parlay/OSA gateway dynamic expansion, open interface technology that is used for, comprising: the Operation and Maintenance Unit of local device and Network Management Function is provided and the network management unit of far-end network management function is provided according to standard webmaster standard; It is characterized in that: this gateway also comprises:
Flexible bus as the public communication channel of intra-gateway, is used for the interacting message between each unit and/or the assembly, and the Parlay API API of standard directly is provided to application server simultaneously;
Configuration management element as the control centre of this gateway, is responsible for each unit of dynamic expansion and/or registration, cancellation, information interaction and the scheduling of assembly, realizes load sharing; And the framework Framework functional unit collection that provides Parlay to organize the standard feature of definition at least is provided, and system support and guarantee assembly; System support wherein and guarantee assembly are carried out following three functions at least:
Registration/the cancellation of assembly: New Parent is when successful installation or unloading, perhaps each process instance of each assembly all will or be nullified to the configuration management element registration when starting or withdrawing from, make SCF assembly and agreement map component realize dynamically " plug and play " function, and provide technical foundation for load sharing and troubleshooting;
The addressing of assembly and distribution: communicating by letter first of carrying out between SCF assembly and application server or the agreement map component must be passed through configuration management element, so that configuration management element uses allocation table to use request to carry out the addressing and the distribution of target element to the assembly of each assembly or external entity, to share load; Described allocation table is the core database in the configuration management element, the information that wherein comprises the type of all registered component processes examples in the system, available situation and loading condition thereof, when the component processes example is registered, the relevant information of this component processes example is write allocation table by configuration management element; When the component processes example is nullified, then this module information is deleted from allocation table; When a component processes example request is used another component processes example, configuration management element utilizes the load sharing algorithm of information in the allocation table and setting to give the requestor with corresponding component processes example allocation, revises the load information of these two component processes examples simultaneously in allocation table.Wherein the load sharing algorithm comprises: circulation selection algorithm, stochastic selection algorithm, based on the load selection algorithm;
Load balancing:, realize load balancing with the expanded function of the name Service ability of CORBA; Its process is: the name Service ability of CORBA is carried out following expansion, earlier a name is mapped to the group objects with same interface, the object in this group can dynamically increase and decrease; When creating group of objects, a selection algorithm is set, again according to the algorithm that is provided with, client is pointed to suitable object with request when resolving the name relevant with this group of objects.Distribute a load value for again each object in the group of objects, identify the size of this object load, during this group of objects of client-requested, always distribute to the member of load value minimum in the group of objects;
Service Capability Feature SCF (Service Capability Features) unit, abstract as the network capabilities of bottom-layer network provides professional with standard A PI form and uses; The function of SCF unit is abideed by the Parlay standard fully, include a plurality of independently of one another, hot-swappable, and can progressively be increased in as required in the SCF unit, finish the assembly of the various corresponding functions of Parlay tissue definition: finish cc (the Call Control SCF) assembly of calling out control class SCF function, finish ui (the User Interaction SCF) assembly of user interactions class SCF function, finish mm (the Mobility Management SCF) assembly of mobile management class SCF function, finish termcap (the Terminal Capabilities SCF) assembly of terminal capability class SCF function, finish dsc (the Data Session Control SCF) assembly of data session control class SCF function, finish gms (the Generic Messaging SCF) assembly of universal information class SCF function, finish cm (the Connectivity Manager SCF) assembly of connection management class SCF function, finish am (the Account Management SCF) assembly of account management class SCF function, finish cs (Charging SCF) assembly of charging class SCF function, finish policy (the Policy Management SCF) assembly of tactical management class SCF function, finish pam (the Presence and AvailabilityManagement SCF) assembly of presence and accessibility administrative class SCF function, above-mentioned all kinds of SCF assemblies can progressively be increased in the SCF unit as required;
Transmission control application protocol TCAP class map unit, be used to finish Parlay API and bottom based on the mapping between the various communication protocols of signalling system No.7 agreement, make to utilize based on the communication protocol of signalling system No.7 agreement and realize communicating by letter with application entity in the non-CORBA territory based on the application entity of Common Object Request Broker Architecture CORBA;
Non-transmission control application protocol TCAP class map unit, map component by various non-TCAP quasi-protocols is formed, be used to finish Parlay API and bottom based on the mapping between various non-TCAP class communication protocol ICP/IP protocol, that comprise SIP (Session Initiation Protocol), the peer-peer protocol CMPP of China Mobile, end-to-end short-message protocol SMPP, make to utilize based on the communication protocol of ICP/IP protocol and realize communicating by letter with application entity in the non-CORBA territory based on the application entity of CORBA.
Described flexible bus adopts the distribution computing technique to realize, complexity and isomerism with the shielding bottom communication, make between each unit/assembly in the gateway can message-oriented and/or OO mode communicate, and provide a kind of at least and determine the method for assembly to guarantee that this gateway can dynamically determine each communication between components route by the name addressing.
Framework Framework functional unit collection in the described configuration management element includes following assembly:
Framework access session assembly (Framework Access Session), the assembly that other assemblies in the unified access interface of this assembly collection, assembly collection must at first be visited before use, be registered;
Framework is used to realize that to client's application component (Framework Application) Framework and client use interface and the information interaction between (client application);
Framework is to Service Component (Framework Service), is used to realize interface and information interaction between Framework and each the SCF Service Component;
Framework is responsible for interface and information interaction between realization Framework and the enterprise operation person to enterprise operation person's assembly (Framework Enterprise).
The function that system support in the described configuration management element and guarantee assembly are carried out also comprises:
Fault management: the standby configuration administration module process instance of creating a redundancy simultaneously is as main backup with the Configuration Manager process instance, adopt heartbeat message to carry out the example inspection between the two, main to the critical data when working write database with the module process instance, in case generation collapse or example inspection are overtime, it oneself is the main module process instance of using that the spare module process instance activates, and from database, read critical data, and recover inside and outside contact, create another spare module process instance simultaneously; The Configuration Manager process instance is monitored the operation of other component processes examples simultaneously, when breaking down, starts the process instance that new process instance replacement is broken down.
The SCF unit of described gateway, TCAP quasi-protocol map unit or non-TCAP quasi-protocol map unit all can be provided with one or more, above-mentioned three kinds of parts can both be realized dynamically " plug and play ", promptly do not revise existing code, do not restart the parts that moving, only need easy configuration, just can hot plug move, realize the expansion of gateway function or performance.
Described SCF unit is made up of functional layer and protocol interface layer, wherein functional layer is the Parlay/OSA api interface of realization standard, and the protocol interface layer is method call and the data structure that the method call of standard P arlay/OSA API and data structure is converted to the puppy parc interface that TCAP quasi-protocol map unit or non-TCAP quasi-protocol map unit provided.
Assembly kind in the described SCF unit, the corresponding function that is its Parlay that can finish definition comprises: call out the control class, the user interactions class, mobile management class, terminal capability class, data session control class, the universal information class, connection management class, account management class, the charging class, tactical management class and presence and accessibility administrative class; Above-mentioned all kinds of SCF assembly can progressively be increased in the SCF unit as required.
Each assembly of described TCAP quasi-protocol map unit is made up of protocol stack layers and protocol adaptation layers; Wherein protocol stack layers is carried out alternately with outside network entity based on No.7 nation-wide Network, introduces network capabilities; Protocol adaptation layers is adapted to a general flexible bus interface to the interface of particular protocol stack, for the SCF component call; To have shielded the interface of certain concrete protocol stack, when changing protocol stack, only need to revise the code of part protocol adaptation layers, need not to revise the code of SCF assembly.
Each assembly of described non-TCAP quasi-protocol map unit is made up of protocol stack layers and protocol adaptation layers; Wherein protocol stack layers is carried out alternately with outside network entity based on ICP/IP protocol, introduces network capabilities; Protocol adaptation layers is adapted to a general flexible bus interface to the interface of setting protocol stack, supply the SCF component call to shield the interface of certain concrete protocol stack, when changing protocol stack, only need to revise the code of part protocol adaptation layers, need not to revise the code of SCF assembly.
The place that is provided with of each parts in the described gateway is not limited in a station server, a kind of implementation platform or the internal lan, only requires that its running environment supports flexible bus, so that by standard agreement, entity carries out transparent communication to external world.
But the present invention is a kind of Parlay/OSA gateway that is used for next generation network NGN dynamic expansion, open interface technology, its advantage is: adopt the public communication channel of flexible bus as each unit, can shield the difference of isomery application system and heterogeneous network system, make gateway of the present invention to be deployed in fast in the real network environment, applied.
Because the registration/de-registration mechanism of the control maincenter-configuration management element executive module of gateway, make this gateway can dynamically introduce new SCF assembly and agreement map component, or the process instance of startup New Parent, can both realize " plug and play " function of assembly, make gateway of the present invention have good autgmentability, can also realize load balancing.
In addition, each assembly of agreement map unit adopts double-layer structure, and wherein protocol adaptation layers has shielded the interface of certain concrete protocol stack.When changing protocol stack, only need to revise the code of part protocol adaptation layers, and the code of SCF assembly is not needed to revise like this, this also helps the scalability of gateway of the present invention.
Similarly, each assembly of SCF unit also adopts double-layer structure, when the function of SCF assembly need be revised or increase new function, as long as relevant functional layer is made amendment and is increased, and the code of protocol interface layer and agreement map component is not needed to revise, help the expansion of gateway function of the present invention.
Description of drawings
Fig. 1 is that the structure of gateway of the present invention is formed schematic diagram.
Fig. 2 is gateway support of the present invention, mail to the sequential chart of a service implementation example of bottom-layer network by application server.
Fig. 3 is gateway support of the present invention, mail to the sequential chart of a service implementation example of application server by bottom-layer network.
Fig. 4 is that the server architecture that the experimental example of gateway of the present invention is used is formed schematic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1, but the present invention is a kind of Parlay/OSA gateway 1 (figure goes out with solid box) that is used for next generation network NGN dynamic expansion, open interface technology, is made up of flexible bus 11, configuration management element 12, SCF unit 13, TCAP quasi-protocol map unit 14, non-TCAP quasi-protocol map unit 15, Operation and Maintenance Unit 16 and network management unit 17.Wherein:
Flexible bus 11 is public communication channels of intra-gateway, is used for the interacting message between each unit and/or the assembly, and the Parlay API API of standard directly is provided to application server 2 simultaneously; This flexible bus adopts the distribution computing technique to realize, complexity and isomerism with the shielding bottom communication, make between each unit/assembly in the gateway can message-oriented and/or OO mode communicate, and provide a kind of at least and determine the method for assembly to guarantee that this gateway can dynamically determine each communication between components route by the name addressing.The flexible bus of gateway of the present invention is based on CORBA standard exploitation realization.
Introduce wherein framework Framework functional unit collection and system support and security function below respectively.
Framework Framework functional unit collection in the configuration management element 12 includes following assembly:
Framework access session assembly (FrameworkAccess Session), other assemblies in the unified access interface of this assembly collection, assembly collection must at first visit and register at this before use;
Framework is used to realize that to client's application component (Framework Application) Framework and client use interface and the information interaction between (client application);
Framework is to Service Component (Framework Service), is used to realize interface and information interaction between Framework and each the SCF Service Component;
Framework is responsible for interface and information interaction between realization Framework and the enterprise operation person to enterprise operation person's assembly (Framework Enterprise).
System support in the configuration management element 12 is finished by relevant system support and guarantee assembly with security function, and the concrete function and the ins and outs of this assembly are described as follows:
Registration/the cancellation of assembly: comprise two aspects to configuration management element registration or when nullifying: one, New Parent when successful installation or unloading, two, each process instance of each assembly is when starting or withdrawing from.This mechanism makes SCF assembly and agreement map component realize dynamically " plug and play " (plug and play) function, and provides technical foundation for load sharing and troubleshooting.
The addressing of assembly and distribution: in the reciprocal process of component processes example, configuration management element provides the addressing service for the component processes example.Detailed process is: communicating by letter first of carrying out between SCF assembly and application server or SCF assembly and the agreement map component must be passed through configuration management element, so that configuration management element uses allocation table (dispatch table) to use request to carry out the addressing and the distribution of target element to the assembly of each assembly or external entity, to share load.This allocation table is the core database in the configuration management element, the information that wherein comprises the type of all registered component processes examples in the system, available situation and loading condition thereof at least, when the component processes example is registered, the relevant information of this component processes example is write allocation table by configuration management element; When the component processes example is nullified, then this module information is deleted from allocation table; When a component processes example request is used another component processes example, configuration management element utilizes the load sharing algorithm of information in the allocation table and setting to give the requestor with corresponding component processes example allocation, revises the load information of these two component processes examples simultaneously in allocation table.Wherein the load sharing algorithm comprises: circulation selection algorithm, stochastic selection algorithm, based on the load selection algorithm etc.
Load balancing:, realize load balancing with the expanded function of the name Service ability of CORBA.Detailed process is: the name Service ability of CORBA is carried out following expansion, earlier a name is mapped to the group objects with same interface, the object in this group can dynamically increase and decrease.When creating group of objects, a selection algorithm can be set, according to the algorithm that is provided with, client is pointed to suitable object with request when resolving the name relevant with this group of objects.Distribute a load value for again each object in the group of objects, identify the size of this object load, during this group of objects of client-requested, always distribute to the member of load value minimum in the group of objects.All objects in the group of objects provide identical service to client.Not needing to distinguish it during client analysis object name is object group name or certain object name, and the client-access group of objects is just the same with the mode of the single object of visit.During the client-access group of objects, resolve quoting of obtaining and be quoting of certain object in this group of objects.Server is according to the request of client, object member's load value in the real-time update group of objects.
Fault management: configuration management element 12 is carried out fault handling method and is improved reliability of operation.Concrete grammar is: create a redundancy simultaneously, do not work at ordinary times, only as standby Configuration Manager process instance, as main backup with the Configuration Manager process instance, adopt heartbeat message to carry out the example inspection between the two, the master will write database with critical data in real time with the module process instance during work, in case it is main overtime with module process instance generation collapse or example inspection, it oneself is the main module process instance of using that the spare module process instance activates, and from database, read critical data, recover inside and outside contact, create another spare module process instance simultaneously; The Configuration Manager process instance is also monitored the operation of other component processes examples simultaneously, when breaking down, it is designated as down state, kills this process instance, and starts new process instance and replace its position.
The SCF unit includes 11 various functional units that are used to finish the definition of Parlay tissue, and these assemblies are independently of one another, hot-swappable, and can progressively be increased in the SCF unit as required.Introduce it below respectively:
Cc (Call Control SCF) assembly: finish the SCF function of calling out the control class;
Ui (User Interaction SCF) assembly: the SCF function of finishing the user interactions class;
Mm (Mobility Management SCF) assembly: the SCF function of finishing the mobile management class;
Termcap (Terminal Capabilities SCF) assembly: the SCF function of finishing the terminal capability class;
Dsc (Data Session Control SCF) assembly: the SCF function of finishing data session control class;
Gms (Generic Messaging SCF) assembly: the SCF function of finishing the universal information class;
Cm (Connectivity Manager SCF) assembly: the SCF function of finishing the connection management class;
Am (Account Management SCF) assembly: the SCF function of finishing the account management class;
Cs (Charging SCF) assembly: the function of finishing charging class SCF;
Policy (Policy Management SCF) assembly: the SCF function of finishing the tactical management class;
Pam (Presence and Availability Management SCF) assembly: the SCF function of finishing presence and accessibility administrative class.
TCAP class map unit 14 is to be used to finish ParlayAPI and bottom based on the mapping between the various communication protocols (comprising CAP, INAP, MAP etc.) of SS7 agreement, makes can utilize based on the communication protocol realization of SS7 agreement with the application entity in the non-CORBA territory based on the application entity of CORBA to communicate by letter.On function, TCAP quasi-protocol map unit is divided into two aspects: TCUserCORBA layer and TCPdu layer.Wherein the TCUserCORBA functional layer is present in the CORBA territory in the TCAP quasi-protocol map unit, it is the entity that traditional TCUser application entity presents in the CORBA mode, it is by based on the standard interface of IDL, communicates by the flexible bus unit with SCF assembly in the Parlay gateway.The TCPdu functional layer then is positioned at the bottom of TCUserCORBA, encapsulated the api function of TC/SS7 protocol stack, TC dialogue function in the CORBA territory can be shone upon, and be transformed to protocol Data Unit TCPDU in the SS7 territory, perhaps finish opposite mapping conversion, thereby realize SS7 territory and the intercommunication of CORBA domain message.
14 pairs of TCAP quasi-protocol map unit adopt critical point mechanism to decode from the TCAP message that the SS7 signaling network is transferred to Parlay gateway of the present invention, after parsing TC User message such as CAP/INAP/MAP, the ParlayAPI by the IDL definition provides corba interface to the SCF assembly again; Perhaps carry out the conversion process of reverse message.Though in the Parlay standard, do not stipulate the action of TCAP quasi-protocol map unit, mapping ruler made guidance instruction at 29.998 paper series of 3GPP." the TC-CORBA intercommunication standard V1.0 " of OMG promulgation followed in the design of TCAP class map unit 14 of the present invention.
Be provided with the CAMEL Application Part map component that connects the GSM mobile network, the Intelligent Network Application Protocol map component and the MAP map component that is connected mobile intelligent net that connects the PSTN fixed network in the TCAP quasi-protocol map unit 14.Wherein each assembly all is made up of protocol stack layers and protocol adaptation layers.Protocol stack layers realizes the function of TCPdu layer: by mutual based on the network entity of SS7 signaling network with the outside, introduce network capabilities.Protocol adaptation layers realizes the function of TCUserCORBA layer: the interface of particular protocol stack is adapted to a general flexible bus interface, for the SCF component call.Because protocol adaptation layers has shielded the interface of certain concrete protocol stack, therefore, when changing protocol stack, only need to revise the partial code of protocol adaptation layers, need not to revise the code of SCF assembly.
The non-TCAP quasi-protocol map unit of being made up of the map component of various non-TCAP quasi-protocols 15 is to be used to finish Parlay API and bottom (to comprise SIP (Session Initiation Protocol) based on the various non-TCAP class communication protocol of ICP/IP protocol, the peer-peer protocol CMPP of China Mobile, end-to-end short-message protocol SMPP etc.) mapping between realizes communication between the two.
Be provided with Session Initiation Protocol map component, CMPP agreement map component and SMPP agreement map component in the non-TCAP quasi-protocol map unit 15.Wherein each assembly also is made up of protocol stack layers and protocol adaptation layers.Protocol stack layers is introduced network capabilities with outside mutual based on the network entity of ICP/IP protocol.Protocol adaptation layers is adapted to a general flexible bus interface to the interface of particular protocol stack, for the SCF component call.Because protocol adaptation layers has shielded the interface of certain concrete protocol stack, therefore, when changing protocol stack, also only need to revise the partial code of protocol adaptation layers, need not to revise the code of SCF assembly.
Operation and Maintenance Unit 16 provides the parts that this gateway carries out local device and Network Management Function, comprises performance management, configuration management, alarm management, Topology Management etc.Main Operation and Maintenance personnel by system pass through operating maintenance terminal 3 uses.Work with the Master-slave pattern between Operation and Maintenance Unit 16 and the unit/assembly that each is maintained: each maintained unit/assembly provides the Operation and Maintenance interface, finishes the Operation and Maintenance of these parts by this interface.Operation and Maintenance Unit 16 provides user interface and far-end access interface, and and each maintained unit/assembly between communicate by flexible bus, interface between them is with IDL IDL (Interface Definition Language) definition.
From the initiator of business, Parlay/OSA gateway of the present invention can be realized two class business: mail to the professional of bottom-layer network and mail to the business of application server by bottom-layer network by application server.
Referring to Fig. 2, introduce a service implementation example that mails to bottom-layer network by application server earlier, key step is as follows:
(1) application server is to the cc assembly of configuration management element request use SCF unit, and configuration management element inquiry allocation table is distributed to application server according to the load sharing algorithm with the process instance of a cc assembly;
(2) application server is initiated service request to the process instance of this cc assembly;
(3) this cc component processes example uses a CAMEL Application Part map component to the configuration management element request, and configuration management element returns to the process instance of certain CAMEL Application Part map component according to the load sharing algorithm process instance of this cc assembly;
(4) process instance of this cc assembly is initiated service request to the process instance of this CAMEL Application Part map component;
(5) process instance of this CAMEL Application Part map component sends a CAP signaling message by signaling platform to bottom-layer network;
(6) bottom-layer network returns signaling message;
(7) this CAMEL Application Part map component process instance is replied to this cc component processes example initiation business;
(8) process instance of this cc assembly is beamed back business to application server and is replied.
Referring to Fig. 3, introduce a service implementation example that mails to application server by bottom-layer network, key step is as follows:
(1) application server is to the cc assembly of configuration management element request use SCF unit, and configuration management element inquiry allocation table is distributed to application server according to the load sharing algorithm with the process instance of a cc assembly;
(2) application server is initiated the service request of Waiting for Call notice to the process instance of this cc assembly;
(3) bottom-layer network is issued CAP signaling of Parlay/OSA gateway by the SS7 signaling network, by a process instance of CAMEL Application Part map component this CAP signaling is handled;
(4) this CAMEL Application Part map component process instance uses the cc assembly of certain SCF unit to the configuration management element request, and configuration management element is distributed to the process instance of this cc assembly according to the load sharing algorithm process instance of this CAMEL Application Part map component;
(5) process instance of this CAMEL Application Part map component is initiated service request to the process instance of this cc assembly;
(6) the process instance Query Database of this cc assembly finds application server, and initiates service request to it;
(7) after application server is handled, return business to the process instance of this cc assembly and reply;
(8) process instance of this cc assembly is replied to the process instance initiation business of this CAMEL Application Part map component;
(9) process instance of this CAMEL Application Part map component sends a CAP operation signaling message by signaling platform to bottom-layer network.
Each member of gateway of the present invention needn't be arranged in a station server, a kind of implementation platform or the internal lan with limiting to, but, require its running environment must support flexible bus, so that by standard agreement, the network element entity carries out transparent communication to external world.Gateway architecture when the applicant tests enforcement to the present invention is the example of a simple application just.
Referring to Fig. 4, experimental example gateway of the present invention is made up of two primary, spare equalization servers and four background servers, and constitutes a local area network (LAN).By IP address-based single system mapping SSI (Single System Image) technology, make whole gateway that a unique virtual ip address outwards is provided.Shared this virtual ip address of whole Parlay/OSA gateway, by this virtual ip address, application server with whole Parlay/OSA gateway regard as one independently, have the host computer system of legitimate ip address, this IP address is all mail in the initial access of application server.Configuration management element is arranged on the primary, spare equalization server, by fault tolerant mechanism, realizes the high availability of gateway.Other SCF unit, TCAP quasi-protocol map unit and non-TCAP quasi-protocol map unit then are deployed on four background servers, by increasing the quantity of background server, just can realize the performance expansion of gateway.
It is successful that test of the present invention is implemented, and has realized goal of the invention.
Claims (9)
1. but Parlay/OSA gateway that is used for next generation network dynamic expansion, open interface technology comprises: the Operation and Maintenance Unit of local device and Network Management Function is provided and the network management unit of far-end network management function is provided according to standard webmaster standard; It is characterized in that: this gateway also comprises:
Flexible bus as the public communication channel of intra-gateway, is used for the interacting message between each unit and/or the assembly, and the Parlay API API of standard directly is provided to application server simultaneously;
Configuration management element as the control centre of this gateway, is responsible for each unit of dynamic expansion and/or registration, cancellation, information interaction and the scheduling of assembly, realizes load sharing; And the framework Framework functional unit collection that provides Parlay to organize the standard feature of definition at least is provided, and system support and guarantee assembly; System support wherein and guarantee assembly are carried out following three functions at least:
Registration/the cancellation of assembly: New Parent is when successful installation or unloading, perhaps each process instance of each assembly all will or be nullified to the configuration management element registration when starting or withdrawing from, make Service Capability Feature SCF assembly and agreement map component realize dynamically " plug and play " function, and provide technical foundation for load sharing and troubleshooting;
The addressing of assembly and distribution: communicating by letter first of carrying out between SCF assembly and application server or the agreement map component must be passed through configuration management element, so that configuration management element uses allocation table to use request to carry out the addressing and the distribution of target element to the assembly of each assembly or external entity, to share load; Described allocation table is the core database in the configuration management element, the information that wherein comprises the type of all registered component processes examples in the system, available situation and loading condition thereof, when the component processes example is registered, the relevant information of this component processes example is write allocation table by configuration management element; When the component processes example is nullified, then this module information is deleted from allocation table; When a component processes example request is used another component processes example, configuration management element utilizes the load sharing algorithm of information in the allocation table and setting to give the requestor with corresponding component processes example allocation, revises the load information of these two component processes examples simultaneously in allocation table; Wherein the load sharing algorithm is: circulation selection algorithm, stochastic selection algorithm or based on the load selection algorithm;
Load balancing:, realize load balancing with the expanded function of the name Service ability of CORBA; Its process is: the name Service ability of CORBA is carried out following expansion, earlier a name is mapped to the group objects with same interface, the object in this group can dynamically increase and decrease; When creating group of objects, a selection algorithm is set, again according to the algorithm that is provided with, client is pointed to suitable object with request when resolving the name relevant with this group of objects; Distribute a load value for again each object in the group of objects, identify the size of this object load, during this group of objects of client-requested, always distribute to the member of load value minimum in the group of objects;
Service Capability Feature SCF unit, abstract as the network capabilities of bottom-layer network provides professional with standard A PI form and uses; The function of SCF unit is abideed by the Parlay standard fully, include following a plurality of independently of one another, can hot plug, and can progressively be increased in as required in the SCF unit, finish the assembly of the various corresponding functions of Parlay tissue definition: finish the calling control cc assembly of calling out control class SCF function, finish the user interactions ui assembly of user interactions class SCF function, finish the mobile management mm assembly of mobile management class SCF function, finish the terminal capability termcap assembly of terminal capability class SCF function, finish the data session control dsc assembly of data session control class SCF function, finish the universal information gms assembly of universal information class SCF function, finish the connection management cm assembly of connection management class SCF function, finish the account management am assembly of account management class SCF function, finish the charging cs assembly of charging class SCF function, finish the tactical management policy assembly of tactical management class SCF function, finish the presence and the accessibility management pam assembly of presence and accessibility administrative class SCF function, above-mentioned all kinds of SCF assemblies can progressively be increased in the SCF unit as required;
Transmission control application protocol TCAP class map unit, be used to finish Parlay API and bottom based on the mapping between the various communication protocols of signalling system No.7 agreement, make to utilize based on the communication protocol of signalling system No.7 agreement and realize communicating by letter with application entity in the non-CORBA territory based on the application entity of Common Object Request Broker Architecture CORBA;
Non-transmission control application protocol TCAP class map unit, map component by various non-TCAP quasi-protocols is formed, be used to finish Parlay API and bottom based on the mapping between various non-TCAP class communication protocol ICP/IP protocol, that comprise SIP (Session Initiation Protocol), the peer-peer protocol CMPP of China Mobile, end-to-end short-message protocol SMPP, make to utilize based on the communication protocol of ICP/IP protocol and realize communicating by letter with application entity in the non-CORBA territory based on the application entity of CORBA.
2. Parlay/OSA gateway according to claim 1, it is characterized in that: described flexible bus adopts the distribution computing technique to realize, complexity and isomerism with the shielding bottom communication, make between each unit/assembly in the gateway can message-oriented and/or OO mode communicate, and provide a kind of at least and determine the method for assembly to guarantee that this gateway can dynamically determine each communication between components route by the name addressing.
3. Parlay/OSA gateway according to claim 1 is characterized in that: the framework Framework functional unit collection in the described configuration management element includes following assembly:
Framework access session assembly, the assembly that other assemblies in the unified access interface of this assembly collection, assembly collection must at first be visited before use, be registered;
Framework is to client's application component, is used to realize interface and information interaction between Framework and the client's application;
Framework is to Service Component, is used to realize interface and information interaction between Framework and each the SCF Service Component;
Framework is to enterprise operation person's assembly, is used to realize interface and information interaction between Framework and the enterprise operation person.
4. Parlay/OSA gateway according to claim 1 is characterized in that: the function that system support in the described configuration management element and guarantee assembly are carried out also comprises:
Fault management: the standby configuration administration module process instance of creating a redundancy simultaneously is as main backup with the Configuration Manager process instance, adopt heartbeat message to carry out the example inspection between the two, main to the critical data when working write database with the module process instance, in case generation collapse or example inspection are overtime, it oneself is the main module process instance of using that the spare module process instance activates, and from database, read critical data, and recover inside and outside contact, create another spare module process instance simultaneously; The Configuration Manager process instance is monitored the operation of other component processes examples simultaneously, when breaking down, starts the process instance that new process instance replacement is broken down.
5. Parlay/OSA gateway according to claim 1, it is characterized in that: the SCF unit of described gateway, TCAP quasi-protocol map unit or non-TCAP quasi-protocol map unit all can be provided with one or more, above-mentioned three kinds of parts can both be realized dynamically " plug and play ", promptly do not revise existing code, do not restart the parts that moving, only need easy configuration, just can hot plug move, realize the expansion of gateway function or performance.
6. Parlay/OSA gateway according to claim 1, it is characterized in that: described SCF unit is made up of functional layer and protocol interface layer, wherein functional layer is the Parlay/OSA api interface of realization standard, and the protocol interface layer is method call and the data structure that the method call of standard P arlay/OSAAPI and data structure is converted to the puppy parc interface that TCAP quasi-protocol map unit or non-TCAP quasi-protocol map unit provided.
7. Parlay/OSA gateway according to claim 1 is characterized in that: each assembly of described TCAP quasi-protocol map unit is made up of protocol stack layers and protocol adaptation layers; Wherein protocol stack layers is carried out alternately with outside network entity based on No.7 nation-wide Network, introduces network capabilities; Protocol adaptation layers is adapted to a general flexible bus interface to the interface of particular protocol stack, for the SCF component call; To shield the interface of certain concrete protocol stack, when changing protocol stack, only need to revise the code of part protocol adaptation layers, need not to revise the code of SCF assembly.
8. Parlay/OSA gateway according to claim 1 is characterized in that: each assembly of described non-TCAP quasi-protocol map unit is made up of protocol stack layers and protocol adaptation layers; Wherein protocol stack layers is carried out alternately with outside network entity based on ICP/IP protocol, introduces network capabilities; Protocol adaptation layers is adapted to a general flexible bus interface to the interface of particular protocol stack, for the SCF component call; To shield the interface of certain concrete protocol stack, when changing protocol stack, only need to revise the code of part protocol adaptation layers, need not to revise the code of SCF assembly.
9. Parlay/OSA gateway according to claim 1, it is characterized in that: the place that is provided with of each parts in the described gateway is not limited in a station server, a kind of implementation platform or the internal lan, only require its running environment support flexible bus, so that by standard agreement, entity carries out transparent communication to external world.
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