CN101710361A - Distributed traffic simulating platform based on Service-Oriented Architecture (SOA) and simulating method thereof - Google Patents
Distributed traffic simulating platform based on Service-Oriented Architecture (SOA) and simulating method thereof Download PDFInfo
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Abstract
The invention discloses a distributed traffic simulating platform based on a Service-Oriented Architecture (SOA) and a simulating method thereof. The distributed traffic simulating platform mainly comprises modules, such as an interactive intelligent agent, a simulating result processing intelligent agent, a coordinating intelligent agent, a road network generating intelligent agent, an area simulating module, a data service center, and the like. The simulation based on a large-scale real road network is finished by the mutual coordination of different intelligent agents. The modules are finished by a service component architecture (SCA), Visual C++ and Visual Basic. In addition, the invention is provided with an SOA access module based on the SCA, which is used for integrating the traditional single-machine simulating program. The invention meets the requirement of the distributed simulating platform on isomerism, improves the flexibility of a system, the reusability of a business model and the interoperability of service and leads the system to be easy for integration.
Description
Technical field
The invention belongs to the distributed traffic simulating field, be specifically related to Service-Oriented Architecture Based (Service-OrientedArchitecture, SOA), technology such as multiple agent, database and distributed emulation.
Background technology
In view of the complicacy of traffic system, become one of main method of traffic signal optimization control based on the optimization of traffic simulation.It has significantly reduced in assessment burden that is caused of resolving to mathematical formulae or physical model during traffic system, greatly reduces the requirement of site test, saves time for researcher provides a kind of, the research means of cost saving, safe and feasible.How distributed traffic simulating will be divided into many less parts to the complex simulation process of large-scale road network if mainly being studied, and they are assigned to parallel processing on a plurality of computing machines, last comprehensive these results obtain final simulation result, can significantly improve simulation speed and efficient.
Distributed traffic simulating platform often comprises the integrated of the exploitation of new module and existing module.New and old module can be different at technical elements such as development language, host-host protocol, hardware and software platforms, solving simulation system to have higher isomerism.In addition, along with the continuous development of informatization, frequent day by day alternately between the different application systems requires each module of distributed system to have reusability preferably.The distributed emulation platform mainly adopts HLA (High Level Architecture) standard at present, yet its reusability is subject to specific emulation support platform (RTI platform), disconnects with other art and standard.Though WebService provides good standards service interface, yet the traditional development mode that combines with J2EE or .NET platform can only be selected the assembly implementation of EJB (Enterprise JavaBean) or .NET language separately, and isomerism is relatively poor.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of distributed traffic simulating platform based on Service-Oriented Architecture Based, to solve the above-mentioned variety of issue that the traditional distributed traffic simulation exists, the isomerism of raising system, the reusability of dirigibility and module, the development difficulty of reduction system.
Distributed traffic simulating platform based on Service-Oriented Architecture Based comprises 4 layers of structure: user interface layer, coordination emulation multiple agent layer, data service center layer and artificial resource layer; Wherein, user interface layer comprises emulation client and data maintenance client; Coordinate emulation multiple agent layer and comprise that interactive intelligence body, road network generate intelligent body, coordination intelligence body, simulation result and handle intelligent body and regional emulation module, regional emulation module is made up of the regional emulation module of VC; The data service center layer comprises data service center, and data service center comprises Hibernate ORM submodule (ORM is Object/Relation Mapping, the Object-relational Database mapping), data generate submodule and data are dispatched submodule; The artificial resource layer is an oracle database;
The emulation that emulation client in the user interface layer is coordinated the interactive intelligence body in the emulation multiple agent layer by visit starts service, assign artificial tasks, and in simulation process, obtain service by the emulated data of interactive intelligence body, obtain final statistics result and real-time simulation result, and with its demonstration;
Data maintenance client in the user interface layer is used for finishing interpolation, modification, inquiry and the deletion of road net data and teleseme parameter;
Coordinate the interactive intelligence body in the emulation multiple agent layer, connecting emulation client and emulation platform intraware, outwards provide emulation startup, emulated data to obtain and upload three services with simulation result; The interactive intelligence body is accepted artificial tasks, according to artificial tasks, determine simulating area and participate in VC zone emulation module in the regional emulation module of emulation, and the data of calling data service center in the data service center layer generate the service of submodule, wait the ready back initialization of regional emulation road net data VC zone emulation module then, after all VC zone emulation module initialization finish, emulation starts the coordination initialization service that service begins to call the coordination intelligence body of coordinating in the emulation multiple agent layer, and the simulation result that receives in simulation process in the coordination emulation multiple agent layer is handled intelligent body by simulation result upload service, the real-time simulation result who uploads;
Simulation result is handled intelligent body, provides real-time results upload service and statistics to generate service; Each VC zone emulation module calls the real-time results upload service that simulation result is handled intelligent body, handle the emulation real-time information that intelligent body upgrades this cycle to simulation result, and simulation result is handled intelligent body by the simulation result upload service, uploads the real-time simulation result and gives the interactive intelligence body;
Coordinate intelligent body, the initialization service of coordinating outwards is provided, inside comprises coordinates to judge service and signal adjustment service; Coordinating the coordination initialization of intelligent body serves when being called, at first open up a plurality of threads, the cycle service of simulation of each VC zone emulation module of the execution thread calls that then circulates, and basis simulation result of last one-period judges whether the needs regional coordination in each emulation cycle, if the current emulation cycle need not to carry out interregional coordination, then coordinate the cycle service of simulation that intelligent body continues to call VC zone emulation module, realize the regional traffic emulation in the period demand, if the current emulation cycle need be carried out interregional coordination, then coordinate intelligent body call signal adjustment service and make a strategic decision;
The zone emulation module, the inner SOA access module that embeds provides regional simulation initialisation service to the interactive intelligence body, provides the cycle service of simulation to coordinating intelligent body; The zone emulation module produces traffic flow and Che Yuan, the motor behavior of simulating vehicle, the emulation of subregion under being responsible for; The data that the regional emulation module of VC calls data service center are dispatched the service of submodule, obtain regional emulation road net data;
Road network generates intelligent body and is partially submerged into the SOA access module as data parsing, emulation module provides road network to generate service to the VC zone, road network generates service obtains road network and teleseme from data service center data object, and convert the type of data structure of regional emulation module correspondence to, make data be applicable to regional emulation module;
Data service center comprises 3 submodules: 1. Hibernate ORM submodule, finish object-relationship map, and realize setting up, and it is persisted in the oracle database in the artificial resource layer based on the data of object primitive; 2. data generate submodule: provide data to generate service, obtain the needed road network information of distributed traffic simulating from oracle database, and it is encapsulated as the SDO data; 3. data are dispatched submodule: provide data to dispatch service, obtain the emulation raw data transmission request that road network generates intelligent body by Web Service, the SDO data that generate are sent to regional emulation module;
Oracle database, road net data information that storage emulation is required and teleseme configuration information;
Interactive intelligence body, the intelligent body of coordination and simulation result handle intelligent body and data service center adopts serviced component framework SCA (Service Component Architecture) standard, and is packaged into the SCA member separately; Existing unit simulated program module then inserts in the emulation platform of the present invention as regional emulation module by the SOA access module.
The regional coordination emulation logic-based clock synchronization of system, each emulation module calls or provides the service of coarseness, and based on different service of simulation, emulation platform is finished large-scale distributed traffic simulation.
Described VC zone emulation module, refer to the unit simulated program module that realizes with Visual C++ by the SOA access module as regional emulation module.
Described SOA access module is made up of two parts: service binding module and service calling module;
The service binding module adopts SCA Java member to realize, comprises data parsing submodule and Socket request submodule, and its application principle is: at first, the service binding module is accepted the service invocation request in the SOA environment, and obtains the SDO data; Then, the data parsing submodule is resolved the SDO data, and by Socket request submodule data are connected through Socket and to send to VC unit simulated program module, VC unit simulated program module and SOA access module are positioned on same the computing machine, and VC unit simulated program module is carried out the associative operation of himself simulated program; Then, VC unit simulated program module turns back to the service binding module by the Socket connection with the result; At last, the service binding module will be returned to such an extent that data result is packaged into the SDO data object, and the person that returns to the service call;
Service calling module then adopts the implementation of The Component Object Model COM (Component Object Model) assembly, comprise serving and quote submodule and data-switching submodule, service is quoted submodule and is adopted the exploitation of common language runtime CLR (Common Language Runtime) host program, and generates with dynamic link library (DLL) (Dynamic LinkLibrary) form; VC unit simulated program module is quoted submodule by the service of com component interface interchange, realizes quoting of service of simulation (sending service as data), and obtains the SDO data; The data-switching submodule is resolved the SDO data and is also reconfigured, and makes consistent in data memory format and the VC unit simulated program module.Data type is in the VC program, com component, need to transform accordingly among the trustship DLL, parameter and the rreturn value transmitted during VC routine call COM service should be used the Variant categorical variable, parameter and the rreturn value transmitted during com component visit trustship DLL then need to carry out trustship, and the unmanaged class type transforms.
Distributed traffic simulating method based on Service-Oriented Architecture Based mainly may further comprise the steps:
The emulation of emulation client-access interactive intelligence body starts service, the VC zone emulation module that the interactive intelligence body is determined simulating area according to artificial tasks and participated in emulation;
The interactive intelligence body calls the service of the data generation submodule of data service center, data service center obtains original road net data from the Oracle data, and by the zone with data recombination and be packaged into the SDO data object, generate regional emulation road net data, after data were ready, interactive intelligence body initialization area emulation module also waited for that simultaneously initialization finishes;
Step 3.1, emulation start service and open up multithreading according to the quantity of the VC zone emulation module that participates in emulation, call regional simulation initialisation service in multithreading;
Step 3.2, emulation start service and finish by the simulation initialisation in the zone bit waiting step 3.1 in main thread;
Each VC zone emulation module generates service by the road network that calls road network and generate intelligent body, obtains the regional emulation road net data that generates in step 2;
Step 5.1, after all VC zone emulation module initialization finished, emulation started service and begins to call the coordination initialization service of coordinating intelligent body, and the life cycle that emulation this moment starts service finishes;
Step 5.2, the emulation client begins the emulated data of recursive call interactive intelligence body and obtains service, obtain public transit vehicle current time coordinate, main line, access connection traffic flow situation and the current phase place of each signal, coordinate the coordination initialization service of intelligent body and at first open up a plurality of threads, and the circulation execution thread, call the cycle service of simulation of each VC zone emulation module;
Coordinate intelligent body in each emulation cycle at first according to last one-period simulation result judge whether the needs regional coordination, if the current emulation cycle need not to carry out interregional coordination, then execution in step 7, if the current emulation cycle need be carried out interregional coordination, then forward step 10 to;
Coordinate the cycle service of simulation that intelligent body calls regional emulation module, realize the regional traffic emulation in the period demand, carry out the renewal of boundary information according to the residing position of subregion, comprise public vehicles telecommunication flow information and bus positional information, execution in step 8 then;
Each VC zone emulation module calls the real-time results upload service that simulation result is handled intelligent body, handles the emulation real-time information that intelligent body upgrades this cycle to simulation result, comprises the public transit vehicle longitude and latitude, travel direction, signal condition;
Step 9.1, after the emulation real-time information in this cycle is upgraded, simulation result is handled the simulation result upload service of intelligent body by the interactive intelligence body, upload the real-time simulation result and give the interactive intelligence body, the emulation client can be obtained service by the emulated data of interactive intelligence body, obtains real-time simulation result and demonstration;
Step 9.2 is coordinated intelligent body and is judged according to simulation time whether whole simulation process finishes, and does not carry out the emulation of following one-period, execution in step 6 if emulation has to finish then circulation; Otherwise end region emulation, execution in step 12;
Coordinating intelligent body call signal adjustment service makes a strategic decision;
According to the parameter of result's update signal machine in the next emulation cycle of step 10 signal adjustment service, execution in step 7 then;
The interactive intelligence body calls the statistics generation service that simulation result is handled intelligent body, and the statistics that generates is uploaded to the interactive intelligence body, and execution in step 13 then;
Step 13, statistics show and finish;
The emulation client obtains final statistics result by the service of obtaining of the emulated data of interactive intelligence body and shows, whole distributed emulation task termination, and wait for the arrival of next artificial tasks.
Advantage of the present invention and good effect are:
(1) adopts the SOA framework, improve the flexibility ratio of distributed emulation platform, be easy to sporadic development, reduce the cost of development and the cycle of system;
(2) emulation module adopts SCA member implementation, but the isomerism of system, reusable type and integration are strong;
(3) the SOA access module has further strengthened the reusability of system, and total system is easy to dispose in heterogeneous environment;
(4) the existing relatively method speed of emulation mode is very fast.
Description of drawings
Fig. 1 is the distributed traffic simulating platform configuration diagram based on Service-Oriented Architecture Based;
Fig. 2 is the system's realization synoptic diagram based on the SCA assembly;
Fig. 3 is the distributed traffic simulating platform SOA access module synoptic diagram based on Service-Oriented Architecture Based;
Fig. 4 is the distributed traffic simulating method operating procedure synoptic diagram based on Service-Oriented Architecture Based;
The road network synoptic diagram of Fig. 5 for adopting in the embodiment of the invention demonstration test;
Fig. 6 is an embodiment of the invention demonstration test gained data;
Among the figure: 1-emulation client, 2-data maintenance client, 3-interactive intelligence body, the 4-simulation result is handled intelligent body, 5-coordinates intelligent body, 6-zone emulation module, and the 7-road network generates intelligent body, the 8-data service center, the 801-data are dispatched submodule, and the 802-data generate submodule, 803-Hibernate ORM submodule, the 9-Oracle database, 10-service binding module, 101-data parsing submodule, 102-Socket asks submodule, the 11-service calling module, 111-data-switching submodule, submodule, 12-VC unit simulated program module are quoted in the 112-service, a-emulation starts service, the b-emulated data is obtained service, c-simulation result upload service, and the d-data generate service, the e-data are dispatched service, f-real-time results upload service, the g-statistics generates service, and h-coordinates the initialization service, the simulation initialisation service of i-zone, j-cycle service of simulation.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As shown in Figure 1, the distributed traffic simulating platform based on Service-Oriented Architecture Based comprises four-layer structure: user interface layer, coordination emulation multiple agent layer, data service center layer and artificial resource layer; Wherein, user interface layer comprises emulation client 1 and data maintenance client 2, emulation client 1 comprise a plurality of clients (client d1, client d2 ... client dN) shows; Coordinate emulation multiple agent layer and comprise that interactive intelligence body 3, simulation result are handled intelligent body 4, coordinated intelligent body 5, road network generates intelligent body 7 and regional emulation module 6, insert VC zone emulation module (VC zone emulation module _ 1 according to artificial tasks in the emulation module 6 of zone, VC zone emulation module _ 2, VC zone emulation module _ k, VC zone emulation module _ N, 1≤k≤N); The data service center layer is a data service center 8, and data service center 8 comprises that again Hibernate ORM submodule 803, data generate submodule 802 and data are dispatched submodule 801; The artificial resource layer is an oracle database 9.
In conjunction with Fig. 1, as follows based on each module realization details of distributed traffic simulating platform and the intermodule relation of Service-Oriented Architecture Based:
1) user interface layer:
● emulation client 1: adopt VB (Visual Basic) and MapX to realize.The road network base map that emulation client 1 shows derives from the desktop Geographic Information System (GIS) software MapInfo electronic chart of U.S. MapInfo company.Emulation client 1 interconnects by the SOA access module with interactive intelligence body 3, mutual The data SDO model encapsulate.Emulation client 1 is assigned artificial tasks by the emulation startup service a of visit interactive intelligence body 3, as Fig. 2, and in simulation process, obtain service b by the emulated data of interactive intelligence body 3, obtain final statistics result and real-time simulation result, and with its demonstration.
● data maintenance client 2: adopt Java SWT (Standard Widget Toolkit) to realize, finish interpolation, modification, inquiry and the deletion of road net data and teleseme parameter by Hibernate ORM submodule 803.
2) coordinate emulation multiple agent layer:
● interactive intelligence body 3: adopt SCA Java member to realize, obtain service b and simulation result upload service c with emulation startup service a, emulated data outwards are provided after the Web Service binding, as Fig. 2.The input parameter that emulation starts service a is the simulation request SDO data that emulation client 1 sends, this service extracts emulation road network scope by XSD (XMLSchemas Definition) data description file and SDO API (application programming interface), the area dividing number, information such as set vehicle parameter.Emulation starts service a can notification data service centre 8 generate the data of corresponding road network, and creates some threads according to regional number and be used to start regional emulation module 6.The return parameters that emulated data is obtained service b is the SDO data, comprises the state of current emulation moment vehicle and teleseme.The input of simulation result upload service c is that the real time data and the emulation that produce in the simulation process finish the statistics that the back generates.Interactive intelligence body 3 is accepted artificial tasks, determine simulating area according to artificial tasks, and the VC zone emulation module in the regional emulation module 6 of participation emulation, and the data of calling data service center 8 generate the service of submodule 802, wait the ready back initialization of regional emulation road net data VC zone emulation module then, after all VC zone emulation module initialization finish, emulation starts service a and begins to call the coordination initialization service h that coordinates intelligent body 5, and the reception simulation result is handled the real-time simulation result that intelligent body 4 is uploaded by real-time results upload service f in simulation process, as Fig. 2.
● simulation result is handled intelligent body 4: adopt SCA Java member to realize, provide real-time results upload service f and statistics to generate service g, as Fig. 2.The input parameter of real-time results upload service f is the emulation real time data, comprises information such as public transit vehicle longitude and latitude and signal lamp state.The input parameter that statistics generates service g is each crossing historic state, and it comprises the bus mean delay time at each crossing, the indexs such as average hourage of each bar public bus network according to historic state zoning signal controlling global index.Each VC zone emulation module calls the real-time results upload service f that simulation result is handled intelligent body 4, handle intelligent body 4 to simulation result and upgrade the emulation real-time information in this cycle, and simulation result is handled intelligent body 4 by simulation result upload service c, uploads the real-time simulation result and gives interactive intelligence body 3.
● coordinate intelligent body 5:, determine the regional coordination decision-making by the emulation of logical timer retaining zone; Adopt SCA Java member to realize, outwards provide and coordinate initialization service h, inside comprises coordinates to judge service and signal adjustment service, as Fig. 2.The input parameter of coordinating initialization service h is the numbering that participates in the regional emulation module of emulation.The input parameter of coordinating the service of judging is to comprise that bus is incured loss through delay and the crossing status information of queue length, and rreturn value is the coordinate scheme decision-making.The input parameter of signal adjustment service is coordinate scheme and the regional current demand signal state of coordination, and rreturn value is adjusted signal parameter.When coordination initialization service h is called, at first can open up a plurality of threads, and each VC zone emulation module (VC zone emulation module _ 1 of circulation execution thread calls, VC zone emulation module _ 2, the cycle service of simulation j of VC zone emulation module _ N), and in each emulation cycle, call and coordinate to judge service, according to last one-period simulation result judge whether the needs regional coordination, if the current emulation cycle need not to carry out interregional coordination, then coordinate the cycle service of simulation j that intelligent body 5 continues to call the VC zone emulation module in the regional emulation module 6, realize the regional traffic emulation in the period demand, if the current emulation cycle need be carried out interregional coordination, then coordinate intelligent body 5 call signal adjustment service and make a strategic decision.
● regional emulation module 6: adopt VC++ to realize.The hybrid simulation model that realistic model adopts macro and micro to combine, public transit vehicle adopt simulation model of microscopic accurately to describe it and travel, and overtake other vehicles, behavior such as enter the station.Public vehicles replace with macroscopical traffic flow.The emulation module 6 inner SOA access module that embed in zone outwards provide regional simulation initialisation service i and cycle service of simulation j, as Fig. 2.Zone simulation initialisation service i realizes that the road network of regional emulation module inside makes up, simulation initialisation operations such as public transit vehicle generation and public vehicles traffic flow generation.Cycle service of simulation j realizes each emulation subregion emulation in one-period.Zone emulation module 6 produces wagon flow and traffic flow, the motor behavior of simulating vehicle, the emulation of subregion under being responsible for; The data that the regional emulation module of the VC that inserts in it calls data service center 8 are dispatched the service of submodule 801, obtain regional emulation road net data.
● road network generates intelligent body 7: adopt the C++COM assembly to realize, embed the SOA access module, provide road network to generate service.Road network generates service and obtains the SDO data object of road network and teleseme from data service center 8, and converts the struct type of data structure of regional emulation module 6 correspondences to.
3) data service center layer:
● data service center 8: adopt SCA Java member to realize, comprise that Hibernate ORM submodule 803, data generate submodule 802 and dispatch submodule 801 with data.Hibernate ORM submodule 803 is realized road net data structure and the persistent storage in oracle database 9 thereof based on the relationship maps of Hibernate.Data generate submodule 802 and finish based on OO road net data extraction by the generation of the data in assembly service d, and generate the SDO data object.Data are dispatched data in the submodule 801 and are dispatched service e and by WebService the SDO data are sent to regional emulation module 6.
4) artificial resource layer:
● oracle database 9: the emulation road network of being stored adopts and comprises topology information, attribute information, the three layer model of geography information.Geography information wherein is stored in the Oracle Spatial database.Entire database comprises the road network topology information table, road network element property information table, road network element geography information table, 13 relational data tables such as teleseme parameter list and mapping set table.
The data transfer mode of each intermodule of the present invention has four kinds, as shown in Figure 1, between emulation client 1 and the interactive intelligence body 3, between interactive intelligence body 3 and the regional emulation module 6, between interactive intelligence body 3 and the data service center 8, simulation result is handled between intelligent body 4 and the regional emulation module 6, coordinates between intelligent body 5 and the regional emulation module 6, and road network generates between intelligent body 7 and the data service center 8, and what all adopt is that Web Service carries out data transmission; Interactive intelligence body 3 and simulation result are handled between the intelligent body 4, between interactive intelligence body 3 and the intelligent body 5 of coordination, between data maintenance client 2 and the data service center 8, and the data in the data service center 8 are dispatched submodule 801 and data generate between the submodule 802, data generate between submodule 802 and the Hibernate ORM submodule 803, employing be that SCA Service carries out data transmission; In addition, what adopt between data service center 8 and the oracle database 9 is that the java database is connected JDBC (Java Data Base Connectivity) and carries out data transmission, and regional emulation module 6 and road network generate that employing COM Service carries out data transmission between the intelligent body.
Work logic-based time synchronized based on each module in the distributed traffic simulating platform of Service-Oriented Architecture Based of the present invention is disposed artificial tasks from emulation client 1 and is finished to return the statistics result to emulation.
The interactive intelligence body 3 of emulation platform of the present invention, the intelligent body 5 of coordination, simulation result handle intelligent body 4 and data service center 8 adopts serviced component framework SCA standards, and be packaged into the SCA member separately, the language independent of SCA makes the SCA assembly to be realized by multilingual, comprises Java, C, C++, BPEL, PHP, COBOL or the like.Each SCA member is made of some SCA assemblies.Each SCA assembly comprises following 4 parts:
● service: the business function that assembly itself provides to other assemblies;
● realize: the code of specific transactions function;
● attribute: the data value in the business function is configured, and then the behavior of influence realization;
● quote: this assembly is realized the dependence to service that other assemblies provide.
The SCA assembly adopts Java to realize that assembly comprises service interface, realization, attribute, quotes interface four parts in the embodiment of the invention.A SCA assembly can externally provide one or more services, the corresponding interface class of each service, the corresponding method of service is presented as a series of abstract method in the service interface class, if service is defined as far call, need carry out note by Yong @Remotable, in realizing class, with (* .class) specified services interface, and the method in the rewriting service interface.If the realization of assembly need comprise the quoting of other Component service, then need call corresponding set method and Yi @Reference and carry out note.The configuration of attribute need be in service implementing type with @Property tag field or Setter method, and in configuration file＜property be configured in the element.
Because distributed emulation platform structure complexity relates to a plurality of modules, is unpractical by a developer from whole exploitations that bottom begins the system that finishes only.At first, the exploitation of distributed system should be based upon on the existing module as far as possible, and secondly, distributed system should be earlier that unit carries out sporadic development with the module, carries out each module integrated at last.The realization of emulation module SCA and SDO data encapsulation have solved the integrated problem of SCA modular system, and the integrated corresponding solution of design that needs of the non-SCA module of stand-alone development.For the unit simulated program is combined with the whole simulation platform, it service of providing need be provided and call the ability of service.Though the simulated program of unit can be separated key component, be packaged into the SCA assembly again, operation has many drawbacks like this.At first,, the one-piece construction of software be can destroy again to its key component encapsulation, upgrading and maintenance that software is follow-up are unfavorable for as a complete unit simulated program.Secondly, unit simulated program itself is larger, and it is big to be packaged into SCA component code change amount again.Once more, the operation of SCA assembly relies on special Web container, and the independence of system's operation reduces.At last, the developer of unit simulated program must have the relevant knowledge of SOA, SCA, SDO simultaneously, otherwise is unfavorable for the sporadic development of total system.And the realization of the present invention innovation a kind of stand-alone program SOA access module, unit simulated program module can be inserted the SOA environment and as the some of distributed emulation console module, and carry out few code revision.
SOA access module and VC unit simulated program module 12 are positioned on same the computing machine, as shown in Figure 3, relate to two environment SOA environment and non-SOA environment, the SOA environment refers to emulation platform environment of the present invention, VC unit simulated program module is the unit simulated program module that realizes by with Visual C++, is in non-SOA environment.The SOA access module comprises two parts: service binding module 10 and service calling module 11.
11 of service calling module adopt the mode of com component to realize, comprise that data-switching submodule 111 and service quote submodule 112.Service is quoted submodule 112 and is adopted the exploitation of CLR host program, and generates with the DLL form.VC unit simulated program module 12 is quoted submodule 112 by the service of com component interface interchange, realizes quoting of service of simulation (sending service as data), and obtains the SDO data.Data-switching submodule 111 is resolved the SDO data and is also reconfigured, and makes consistent in data memory format and the VC unit simulated program module 12.Data type is in the VC program, com component, need to transform accordingly among the trustship DLL, parameter and the rreturn value transmitted during VC routine call COM service should be used the Variant categorical variable, parameter and the rreturn value transmitted during com component visit trustship DLL then need to carry out trustship, and the unmanaged class type transforms.The interface that com component provides among Fig. 3 all needs the interface inheritance from IUnknown.
Based on the emulation mode of the distributed traffic simulating platform of Service-Oriented Architecture Based, its simulation flow as shown in Figure 4, concrete steps are described as follows:
The emulation of emulation client 1 visit interactive intelligence body 3 starts service, the VC zone emulation module that interactive intelligence body 3 is determined simulating area according to artificial tasks and participated in regional emulation module 6 accesses of emulation.
Step 3.1, emulation start service and open up multithreading according to the quantity of the VC zone emulation module that participates in emulation, call regional simulation initialisation service in multithreading;
Step 3.2, emulation start service and finish by the simulation initialisation in the zone bit waiting step 3.1 in main thread;
Each VC zone emulation module generates service by the road network that calls road network and generate intelligent body, obtains the regional emulation road net data that generates in step 2.
Step 5.1, after all VC zone emulation module initialization finished, emulation started service and begins to call the coordination initialization service of coordinating intelligent body 5, and the life cycle that emulation this moment starts service finishes;
Step 5.2, the emulated data of emulation client 1 beginning recursive call interactive intelligence body 3 is obtained service, obtains public transit vehicle current time coordinate, current phase places such as main line, access connection traffic flow situation and each signal.Coordinate the coordination initialization service of intelligent body 5 and at first can open up a plurality of threads, and the cycle service of simulation of each VC zone emulation module of circulation execution thread calls.
Coordinate intelligent body 5 in each emulation cycle at first according to last one-period simulation result judge whether the needs regional coordination.If the current emulation cycle need not to carry out interregional coordination, then execution in step 7, if the current emulation cycle need be carried out interregional coordination, then execution in step 10.
Coordinate the cycle service of simulation that intelligent body 5 calls regional emulation module 6, realize the regional traffic emulation in the period demand, carry out the renewal of boundary information according to the residing position of subregion, comprise public vehicles telecommunication flow information and bus positional information, execution in step 8 then.
Each VC zone emulation module calls the real-time results upload service that simulation result is handled intelligent body 4, handles intelligent body 4 to simulation result and upgrades the emulation real-time information in this cycle, comprises the public transit vehicle longitude and latitude, travel direction, states such as signal etc.
Step 9.1, after the emulation real-time information in this cycle is upgraded, simulation result is handled the simulation result upload service of intelligent body 4 by interactive intelligence body 3, upload the real-time simulation result and give interactive intelligence body 3, emulation client 1 can be obtained service by the emulated data of interactive intelligence body 3, obtains real-time simulation result and demonstration;
Step 9.2 is coordinated intelligent body 5 and whether is expired to judge whether whole simulation process finishes according to simulation time, does not carry out the emulation of following one-period if emulation has to finish then circulation, forwards step 6 to and carries out, if emulation finishes, step 12 is changeed in then end region emulation then.
Coordinating intelligent body 5 call signal adjustment service makes a strategic decision.
According to the parameter of result's update signal machine in the next emulation cycle of step 10 signal adjustment service, execution in step 7 then.
Step 13, statistics show and finish;
At last, in order to verify the feasibility of distributed traffic simulating platform of the present invention, this paper has selected the interior true road network in certain district to experimentize, and road network as shown in Figure 5.
Whole road network is divided into 3 sub regions, and with dashed lines frame and solid box are told, and is provided with 3 public bus network: Line1:A1-A2-A14-A15-A16-A17-A18-A19-A7-A8-A9-A21-A31-A32-A33-A34 in the road network, has 7 stations; Line2:A25-A26-A27-A28-A16-A17-A18-A19-A29-A30-A31-A21-A2 2-A23-A24 has 8 stations; Line3:A35-A36-A37-A38-A39-A28-A29-A40-A41-A42-A43 has 7 stations; Every circuit uplink and downlink direction has 20 buses, departure interval is 1 minute, the average velocity of public transit vehicle is 12 meter per seconds, public vehicles inject at the place, crossing in the traffic flow mode, signal controlling adopts half induction control, and the signal period is 120 seconds, and minimum green time is 20 seconds, maximum green time is 60 seconds, and simulation time is set at 1 hour.
87 seconds consuming time of whole distributed emulation has proved the high efficiency of distributed traffic simulating platform of the present invention.Be respectively 1303.10 seconds the average hourage of three-line, 1159.58 seconds and 1096.32 seconds.In addition, this paper has added up the crossing public transit vehicle by two indexs of number (APB) and public transit vehicle crossing mean delay (AD, second), as shown in Figure 6.With crossing A8 and A12 is example, and the bus quantity by crossing A8 is 96, and the bus mean delay is 11.47 seconds; Crossing A12 does not have bus to pass through, and then its mean delay time can't be added up.Distributed emulation gained data and unit simulated program gained data basically identical show the correctly behavior of simulating vehicle of distributed emulation platform, have verified its correctness.
Claims (7)
1. based on the distributed traffic simulating platform of Service-Oriented Architecture Based, it is characterized in that, comprise four-layer structure: user interface layer, coordination emulation multiple agent layer, data service center layer and artificial resource layer; Wherein, user interface layer comprises emulation client and data maintenance client; Coordinate emulation multiple agent layer and comprise that interactive intelligence body, road network generate intelligent body, coordination intelligence body, simulation result and handle intelligent body and regional emulation module, regional emulation module is made up of the regional emulation module of VC; The data service center layer comprises data service center, and data service center comprises that Hibernate ORM submodule, data generate submodule and data are dispatched submodule; The artificial resource layer is an oracle database;
The emulation that emulation client in the user interface layer is coordinated the interactive intelligence body in the emulation multiple agent layer by visit starts service, assign artificial tasks, and in simulation process, obtain service by the emulated data of interactive intelligence body, obtain final statistics result and real-time simulation result, and with its demonstration;
Data maintenance client in the user interface layer is used for finishing interpolation, modification, inquiry and the deletion of road net data and teleseme parameter;
Coordinate the interactive intelligence body in the emulation multiple agent layer, connecting emulation client and emulation platform intraware, outwards provide emulation startup, emulated data to obtain and upload three services with simulation result; The interactive intelligence body is accepted artificial tasks, according to artificial tasks, determine simulating area and participate in VC zone emulation module in the regional emulation module of emulation, and the data of calling data service center in the data service center layer generate the service of submodule, wait the ready back initialization of regional emulation road net data VC zone emulation module then, after all VC zone emulation module initialization finish, emulation starts serves the coordination initialization service that begins to call the coordination intelligence body of coordinating in the emulation multiple agent layer, and the simulation result that receives in simulation process in the coordination emulation multiple agent layer is handled the real-time simulation result that intelligent body is uploaded by the simulation result upload service;
Simulation result is handled intelligent body, provides real-time results upload service and statistics to generate service; Each VC zone emulation module calls the real-time results upload service that simulation result is handled intelligent body, handle the emulation real-time information that intelligent body upgrades this cycle to simulation result, and simulation result is handled intelligent body by the simulation result upload service, uploads the real-time simulation result and gives the interactive intelligence body;
Coordinate intelligent body, provide the initialization service of coordinating to the interactive intelligence body, inside comprises coordinates to judge service and signal adjustment service; Coordinating the coordination initialization of intelligent body serves when being called, at first open up a plurality of threads, the cycle service of simulation of each VC zone emulation module of the execution thread calls that then circulates, and basis simulation result of last one-period judges whether the needs regional coordination in each emulation cycle, if the current emulation cycle need not to carry out interregional coordination, then coordinate the cycle service of simulation that intelligent body continues to call VC zone emulation module, realize the regional traffic emulation in the period demand, if the current emulation cycle need be carried out interregional coordination, then coordinate intelligent body call signal adjustment service and make a strategic decision;
The zone emulation module, the inner SOA access module that embeds provides regional simulation initialisation service to the interactive intelligence body, provides the cycle service of simulation to coordinating intelligent body; The zone emulation module produces traffic flow and Che Yuan, the motor behavior of simulating vehicle, the emulation of subregion under being responsible for; The data that the regional emulation module of VC calls data service center are dispatched the service of submodule, obtain regional emulation road net data;
Road network generates intelligent body and is partially submerged into the SOA access module as data parsing, emulation module provides road network to generate service to the VC zone, road network generates service obtains road network and teleseme from data service center SDO data object, and convert the type of data structure of regional emulation module correspondence to, make data be applicable to regional emulation module;
Data service center comprises 3 submodules: 1. Hibernate ORM submodule, finish object-relationship map, and realize setting up, and it is persisted in the oracle database in the artificial resource layer based on the data of object primitive; 2. data generate submodule: provide data to generate service, obtain the needed road network information of distributed traffic simulating from oracle database, and it is encapsulated as the SDO data; 3. data are dispatched submodule: provide data to dispatch service, obtain the emulation raw data transmission request that road network generates intelligent body by Web Service, the SDO data that generate are sent to regional emulation module;
Oracle database, road net data information that storage emulation is required and teleseme configuration information;
The interactive intelligence body, coordinate that intelligent body, simulation result are handled intelligent body and data service center adopts serviced component framework SCA standard, and be packaged into the SCA member separately; Existing unit simulated program module then inserts in the emulation platform as regional emulation module by the SOA access module;
The regional coordination emulation logic-based clock synchronization of system, each emulation module calls or provides the service of coarseness, and based on different service of simulation, emulation platform is finished large-scale distributed traffic simulation;
Wherein, SOA represents Service-Oriented Architecture Based, and SCA represents the serviced component framework, and VC is Visual C++, and SDO is Service data Objects, ORM representative object-relational database mapping.
2. the distributed traffic simulating platform based on Service-Oriented Architecture Based according to claim 1, it is characterized in that, described VC zone emulation module refers to insert regional emulation module with the unit simulated program module of Visual C++ realization by the SOA access module.
3. the distributed traffic simulating platform based on Service-Oriented Architecture Based according to claim 1 and 2 is characterized in that, described SOA access module is made up of two parts: service binding module and service calling module;
The service binding module adopts SCA Java member to realize, comprises data parsing submodule and Socket request submodule, and its application principle is: at first, the service binding module is accepted the service invocation request in the SOA environment, and obtains the SDO data; Then, the data parsing submodule is resolved the SDO data, and by Socket request submodule data are connected through Socket and to send to VC unit simulated program module, VC unit simulated program module and SOA access module are positioned on same the computing machine, and VC unit simulated program module receives the associative operation that data are carried out himself simulated program; Then, VC unit simulated program module turns back to the service binding module by the Socket connection with the result; At last, the service binding module will be returned to such an extent that data result is packaged into the SDO data object, and the person that returns to the service call;
Service calling module then adopts the implementation of com component, comprises serving quoting submodule and data-switching submodule, and service is quoted submodule and adopted the exploitation of CLR host program, and generates with the DLL form; VC unit simulated program module is quoted submodule by the service of com component interface interchange, realizes quoting of service of simulation, and obtains the SDO data; The data-switching submodule is resolved the SDO data and is also reconfigured, and makes consistent in data memory format and the VC unit simulated program module; Wherein, COM proxy component object model, CLR represents the common language runtime, and DLL represents dynamic link library.
4. the distributed traffic simulating platform based on Service-Oriented Architecture Based according to claim 1, it is characterized in that, described interactive intelligence body adopts SCA Java member to realize, three services that provide are specially: the input parameter that emulation starts service is the simulation request SDO data that the emulation client sends, emulation starts the Service Notification data service center and generates the data of corresponding road network, and creates some threads according to regional number and be used to start regional emulation module; The return parameters that emulated data is obtained service is the SDO data, comprises the state of current emulation moment vehicle and teleseme; The input of simulation result upload service is that the real time data and the emulation that produce in the simulation process finish the statistics that the back generates.
5. the distributed traffic simulating platform based on Service-Oriented Architecture Based according to claim 1, it is characterized in that, described simulation result is handled intelligent body and is adopted SCA Java member to realize, two services that provide are specially: the input parameter of real-time results upload service is the emulation real time data, comprises public transit vehicle longitude and latitude and signal lamp status information; The input parameter that statistics generates service is each crossing historic state, and it comprises the bus mean delay time at each crossing according to historic state zoning signal controlling global index, the average hourage of each bar public bus network.
6. the distributed traffic simulating platform based on Service-Oriented Architecture Based according to claim 1, it is characterized in that, the intelligent body of described coordination adopts SCA Java member to realize that its three services that provide are specially: the input parameter of coordinating the initialization service is the numbering that participates in the regional emulation module of emulation; The input parameter of coordinating the service of judging is to comprise that bus is incured loss through delay and the crossing status information of queue length, and rreturn value is the coordinate scheme decision-making; The input parameter of signal adjustment service is coordinate scheme and the regional current demand signal state of coordination, and rreturn value is adjusted signal parameter.
7. application rights requires the emulation mode of 1 described distributed traffic simulating platform based on Service-Oriented Architecture Based, it is characterized in that, comprises the steps:
Step 1, emulation start;
The emulation of emulation client-access interactive intelligence body starts service, the VC zone emulation module that the interactive intelligence body is determined simulating area according to artificial tasks and participated in emulation;
Step 2, data are prepared;
The interactive intelligence body calls the service of the data generation submodule of data service center, data service center obtains original road net data from the Oracle data, and by the zone with data recombination and be packaged into the SDO data object, generate regional emulation road net data, after data were ready, interactive intelligence body initialization area emulation module also waited for that simultaneously initialization finishes;
Step 3, initialization area emulation module comprise step 3.1 and step 3.2, and these two steps all are Multi-task Concurrency;
Step 3.1, emulation start service and open up multithreading according to the quantity of the VC zone emulation module that participates in emulation, call regional simulation initialisation service in multithreading;
Step 3.2, emulation start service and finish by the simulation initialisation in the zone bit waiting step 3.1 in main thread;
Step 4, obtain regional emulation road net data;
Each VC zone emulation module generates service by the road network that calls road network and generate intelligent body, obtains the regional emulation road net data that generates in step 2;
Step 5, regional coordination emulation start, and are specially:
Step 5.1, after all VC zone emulation module initialization finished, emulation started service and begins to call the coordination initialization service of coordinating intelligent body, and the life cycle that emulation this moment starts service finishes;
Step 5.2, the emulation client begins the emulated data of recursive call interactive intelligence body and obtains service, obtain public transit vehicle current time coordinate, main line, access connection traffic flow situation and the current phase place of each signal, coordinate the coordination initialization service of intelligent body and at first open up a plurality of threads, and the circulation execution thread, call the cycle service of simulation of each VC zone emulation module;
Step 6, regional coordination control;
Coordinate intelligent body in each emulation cycle at first according to last one-period simulation result judge whether the needs regional coordination, if the current emulation cycle need not to carry out interregional coordination, then execution in step 7, if the current emulation cycle need be carried out interregional coordination, then forward step 10 to;
Step 7, periodic regions are coordinated emulation;
Coordinate the cycle service of simulation that intelligent body calls regional emulation module, realize the regional traffic emulation in the period demand, carry out the renewal of boundary information according to the residing position of subregion, comprise public vehicles telecommunication flow information and bus positional information, execution in step 8 then;
Step 8, generation real-time traffic emulated data;
Each VC zone emulation module calls the real-time results upload service that simulation result is handled intelligent body, handles the emulation real-time information that intelligent body upgrades this cycle to simulation result, comprises the public transit vehicle longitude and latitude, travel direction, signal condition;
Step 9, simulation status are judged and data upload, comprise step 9.1 and step 9.2;
Step 9.1, after the emulation real-time information in this cycle is upgraded, simulation result is handled the simulation result upload service of intelligent body by the interactive intelligence body, upload the real-time simulation result and give the interactive intelligence body, the emulation client can be obtained service by the emulated data of interactive intelligence body, obtains real-time simulation result and demonstration;
Step 9.2 is coordinated intelligent body and is judged according to simulation time whether whole simulation process finishes, and does not carry out the emulation of following one-period, execution in step 6 if emulation has to finish then circulation; Otherwise end region emulation, execution in step 12;
Step 10, coordination control decision;
Coordinating intelligent body call signal adjustment service makes a strategic decision;
Step 11, update signal machine parameter;
According to the parameter of result's update signal machine in the next emulation cycle of step 10 signal adjustment service, execution in step 7 then;
Step 12, emulation statistics generate;
The interactive intelligence body calls the statistics generation service that simulation result is handled intelligent body, and the statistics that generates is uploaded to the interactive intelligence body, and execution in step 13 then;
Step 13, statistics show and finish;
The emulation client obtains final statistics result by the service of obtaining of the emulated data of interactive intelligence body and shows, whole distributed emulation task termination, and wait for the arrival of next artificial tasks.
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