CN102542106B - Distributed traffic simulation system and simulation method based on variable region division - Google Patents

Abstract

The invention discloses a distributed traffic simulation system and simulation method based on variable area division. According to the present invention, a long time period is divided into a plurality of continuous short time periods, and the change of the distribution of people and vehicles on the road network in the short time period is much smaller than the change of the distribution of people and vehicles in the total time period. In each short period of time, a regional division scheme is adopted according to the distribution of people and vehicles to reduce the change of the number of people and vehicles between regions in the time period, so as to achieve the purpose of balancing the load of each simulation server.

Description

Distributed traffic simulation system and simulation method based on variable area division

technical field

The invention relates to the field of information technology industry simulation and simulation technology, in particular to a distributed traffic simulation system and simulation method based on variable area division.

Background technique

Optimal scheduling and control based on traffic simulation is considered to be an effective method to optimize vehicle scheduling and signal control schemes and alleviate traffic congestion. Large cities have the characteristics of large road network scale and large number of people and vehicles. Therefore, a large area is usually divided into multiple small areas and distributed parallel simulations on multiple computers to achieve the purpose of improving the simulation speed.

At present, all the implementation technologies of distributed traffic simulation mainly include Service Oriented Architecture (SOA for short) and High Level Architecture (HLA for short), both of which adopt fixed regional division methods in area division. Due to the characteristics of tidal traffic in large cities, the population flows between different regions, the population in a specific region changes with time, and the speed of traffic simulation in a specific region changes with the population in the region.

The real-time speed of distributed simulation depends on the simulation server with the slowest real-time speed. The distributed traffic simulation method using fixed area division cannot dynamically adjust the simulation area division according to the regional population changes, so that the calculation load cannot be balanced and the calculation resources cannot be fully utilized. Simulation speed improvements are limited.

Contents of the invention

(1) Technical problems to be solved

In order to solve one or more of the above problems, the present invention provides a distributed traffic simulation system and simulation method to balance the load of each simulation server, make full use of its computing resources, and improve the overall simulation speed.

(2) Technical solution

According to one aspect of the present invention, a distributed traffic simulation system is provided, the distributed traffic simulation system includes: an area division server, used to provide road network files and area division schemes corresponding to N time periods; an area coordination server, Connected to the area division server, used to generate a full road network model according to the road network file, and for each of the N time periods, convert the full road network model from the time period corresponding to the time period Decompose the regional division scheme, generate M regional road network models, and distribute the regional road network models to the corresponding regional simulation servers; the regional simulation server group is composed of M regional simulation servers; each of the M simulation servers One simulation server is connected to the regional coordination server, and is used to perform traffic simulation in each of the N time periods according to the regional road network model of the area under the jurisdiction of the time period.

According to another aspect of the present invention, a distributed traffic simulation method is provided. The distributed simulation method includes: step A, the area division server generates the area division scheme sequence corresponding to different time periods, and stores the area division scheme sequence and the road network file; step B, the area coordination server generates the whole road network model, for each time period in the N time periods, the whole road network model is decomposed by the regional division scheme corresponding to the time period, M regional road network models are generated, and the regional road network The model is distributed to the corresponding regional simulation server; step C, the m simulation server in the regional simulation server group, for the nth time period in the N time period, according to the regional road of the area under the jurisdiction of the time period Network model for traffic simulation, the m=1, 2, ..., M, the n = 1, 2, ..., N.

(3) Beneficial effects

To sum up, the distributed traffic simulation system and simulation method based on variable area division of the present invention have the following beneficial effects:

(1) Compared with the existing method, the variable area division method is adopted to allow the area division to adapt to the change of the population tidal flow, avoiding the unbalanced load of the simulation server caused by the population tidal flow, and improving the running speed of the distributed simulation;

(2) After the simulation speed is increased, it will be possible to optimize the dispatch and control of traffic in large cities based on simulation.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the distributed traffic simulation system of the embodiment of the present invention;

Fig. 2 is the implementation flowchart of the distributed traffic simulation method of the embodiment of the present invention;

Fig. 3 is the data flowchart of the distributed traffic simulation method of the embodiment of the present invention;

Fig. 4 is the road network diagram that adopts when carrying out verification test to the distributed traffic simulation method of the embodiment of the present invention;

Fig. 5 is an area decomposition diagram of the road network by time period when the distributed traffic simulation method of the embodiment of the present invention is verified and tested.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. While illustrations of parameters including particular values may be provided herein, it should be understood that parameters need not be exactly equal to the corresponding values, but rather may approximate the values within acceptable error margins or design constraints.

In the present invention, according to dividing a long time period into a plurality of continuous short time periods, the change of the distribution of people and vehicles on the road network in the short time period is much smaller than the change of the distribution of people and vehicles in the total time period. In each short period of time, a regional division scheme is adopted according to the distribution of people and vehicles to reduce the change of the number of people and vehicles between regions in the time period, so as to achieve the purpose of balancing the load of each simulation server.

In an exemplary embodiment of the present invention, a distributed traffic simulation system based on variable area division is provided. Fig. 1 is a schematic diagram of the architecture of the distributed traffic simulation system according to the embodiment of the present invention. As shown in Figure 1, the distributed traffic simulation system based on variable area division in this embodiment is divided into three parts: area division server 1, area coordination server 2 and area simulation server group 3; wherein area division server 1 contains road network File library 101, dynamic area division scheme management module 102 and area division scheme library 103; Regional coordination server 2 includes server communication configuration module 201, road network and area division scheme loading module 202, simulation control module 203, regional population entry and exit coordination module 204 , regional model switching coordination module 205 and simulation result statistics module 206; regional simulation server group layer 3 is made up of multiple regional simulation servers 301, and each regional simulation server 301 includes regional road network information loading module 30101, regional simulation module 30102, regional Switching module 30103 and management module 30104 for people and vehicles entering and leaving the area.

Combined with Figure 1, the implementation details of each module of the distributed traffic simulation system based on the variable area road network and the relationship between the modules are as follows:

The road network file library 101 in the area division server 1 stores road network files.

The area division scheme database 103 in the area division server 1 stores a sequence of area division schemes of a large-scale road network (including a plurality of continuous time period information and corresponding area division scheme information).

The dynamic area division scheme management module 102 in the area division server 1 is responsible for loading road network files, and generating a sequence of area division schemes according to the road network files and time periods. For all-day traffic simulation, the whole day is divided into 6 time periods according to the morning peak starting point, morning peak midpoint, morning peak midpoint, evening peak starting point, evening peak midpoint, and evening peak points, and each time period adopts a Regional division plan.

The road network and regional division scheme loading module 202 in the regional coordination server 2 is responsible for: 1. read the road network and regional division files from the road network file library 101 and the regional division scheme warehouse 103; Each regional division scheme is composed of time period information and multiple regional models that constitute a complete road network; ③ Generate virtual ports of all regions for each regional division scheme, and describe inter-regional connection information; each A virtual port contains connected areas and road information, and people and vehicles can cross areas at the virtual port; ④For each area switch, generate new sub-areas and new subtracted sub-areas for each simulation server, for coordinated use of area switching .

The regional population entry and exit coordination module 204 in the regional coordination server 2 is responsible for: 1. receiving the data of people and vehicles leaving the simulation area sent by each simulation server 301; 301 Send the data of people and vehicles entering the corresponding simulation area.

The regional model switching coordination module 205 in the regional coordination server 2 is responsible for: when switching regions, 1. receiving the road network people-vehicle data of the sub-regions that are about to be removed from each simulation server 301; The area arranges the received road network passenger and vehicle data; ③ sends the road network passenger and vehicle data of the corresponding newly added sub-areas to each simulation server 301 .

The server communication configuration module 201 in the regional coordination server 2 configures information such as names, numbers, IP addresses, ports, etc. of the regional coordination server 2 and each simulation server 301 for use in communication between the regional coordination server 2 and the simulation servers 301.

The simulation control module 203 in the regional coordination server 2 is responsible for: ① preparation for simulation; ② starting the simulation; ③ suspending the simulation; ④ terminating the simulation.

The simulation result statistics module 206 in the regional coordination server 2 is responsible for: ① statistical simulation results and calculation indicators; ② presentation of simulation results to users in the form of tables and graphics.

The regional road network information loading module 30101 in the regional simulation server 301 is responsible for: ① receiving the regional road network model sequence of the server from the regional coordination server 2; it is composed of a plurality of continuous time periods and regional road network models corresponding to the time periods; The regional coordination server 2 receives the virtual port information of each simulation area that the server is responsible for; ③ from the regional coordination server 2, it receives the newly added sub-area and the newly subtracted sub-area of each area switching of the server.

The regional simulation module 30102 in the regional simulation server 301 is responsible for: ① simulating the regional traffic model and counting the simulation results in real time; ② sending the regional simulation results to the regional coordination server 2 .

The area switching module 30103 in the area simulation server 301 is responsible for: when area switching, 1) send to the area coordination server 2 the road network passenger and vehicle data of the sub-area that will be removed; The road network data of people and vehicles in the sub-region.

The regional people-vehicle entry and exit management module 30104 in the regional simulation server 301 is responsible for: ① sending to the regional coordination server 2 the data of people and vehicles that are about to leave the region through the virtual port; car data.

FIG. 2 is a flow chart of the implementation of the distributed traffic simulation method of the embodiment of the present invention; FIG. 3 is a data flow chart of the distributed traffic simulation method of the embodiment of the present invention. As shown in Figure 2 and Figure 3, the distributed traffic simulation method based on variable area division includes the following steps:

Step 1, regional division server (1 among Fig. 1) reads large-scale road network file from road network file storehouse (101 among Fig. 1);

Step 2, area division server (1 among Fig. 1) generates people-vehicle data and OD matrix;

Traffic starting and ending points survey is also called OD traffic volume survey. OD traffic volume refers to the traffic volume between the origin and destination. "O" comes from English Origin, and "D" comes from English Destination. The results of the OD traffic volume survey are represented by a two-dimensional table and become an OD matrix.

Step 3. The area division server (1 in FIG. 1 ) generates a sequence of area division schemes. Including Step 3_1, Step 3_2 and Step 3_3.

Step 3_1. Take the starting point of the morning peak, the midpoint of the morning peak, the end of the morning peak, the starting point of the evening peak, the midpoint of the evening peak, and the end of the evening peak in the time period, a total of 6 time nodes; every two adjacent time points form a time period , a total of 6 time periods are formed;

Step 3_2, adopt a regional division scheme for each time period; estimate the distribution of people and vehicles in the road network in these 6 time periods, and give 6 kinds of regional division schemes according to the distribution of people and vehicles;

Step 3-3, form the area division scheme sequence of large-scale road network with time period and corresponding area division scheme, and save to area division scheme storehouse (103 among Fig. 1);

Step 4, the user reads the regional division server (1 among Fig. 1) from the regional coordination server (2 among Fig. 1) and uploads the road network file library (101 among Fig. 1) and the regional division scheme library (103 among Fig. 1) The road network file and the corresponding regional division scheme sequence file generate the road network model and the regional division scheme sequence model; assume that the regional division scheme sequence model contains N time periods, and the road network is divided into M regions in each time period; Contains step 4_1, step 4_2, step 4_3, step 4_4;

Step 4_1, generate a large-scale road network model including all regions according to the road network file;

Step 4_2, numbering the time periods in the sequence of regional division schemes in chronological order, the order is 1, 2, ..., N; for time periods n (n=1, 2, ..., N), copy all regional road network models from the large-scale road network model generated in step 4.1 according to its regional division scheme, and number them according to the order of copying, the order is 1, 2, ..., M;

Step 4_3, generate a virtual port for the mth area (1, 2, ..., M) in the time period n (n=1, 2, 3, ..., N), virtual Port refers to the virtual road network nodes that people and vehicles pass through between adjacent areas;

Step 5, each simulation server (301 among Fig. 1) is numbered 1, 2, ..., M (simulation server quantity and road network decomposition area quantity are identical); Regional coordination server (2 among Fig. 1 ) and each simulation server (301 among Fig. 1) carry out simulation preparation, and this step is divided into step 5_1, step 5_2, step 5_3, step 5_4, step 5_5;

Step 5_1. Comparing the regional road network model m (m=1, 2, . . . , M) in the time period n (n=2, 3, . The difference between the regional road network model m within -1, the newly added sub-region model and the newly reduced sub-region model of the regional road network model m within the time period n are generated, and the newly added sub-region model and the newly reduced sub-region model are numbered as m;

Step 5_2, simulation server m (m=1, 2, ..., M) (301 in Fig. 1) reads time period n (n =1, 2, ..., the regional road network model m in N);

Step 5_3, simulation server m (m=1, 2, ..., M) (301 in Fig. 1) reads time period n (n =2,..., the newly added sub-area model m and the newly subtracted sub-area model m in N);

Step 5-4, emulation server m (m=1, 2, ..., M) (301 among Fig. 1) read time period n (n =1, 2, ..., the virtual port information of the regional road network model m in N);

Step 5-5, regional coordination server (2 among Fig. 1) and emulation server m (m=1,2,..., M) (301 among Fig. 1) current time period is set as time period 1; Simulation server m (m=1, 2, ..., M) (2 in Fig. 1) loads regional road network model m in time period 1;

Step 6, regional coordination server (2 among Fig. 1) sends start emulation signal to each emulation server (301 among Fig. 1);

Step 7. Each simulation server (301 in FIG. 1 ) completes the single-cycle simulation operation forward simultaneously. Including Step 7_1, Step 7_2 and Step 7_3;

Step 7_1, each simulation server (301 in FIG. 1 ) simulation advances one clock cycle forward. Generally, one simulation cycle corresponds to 1 second in actual traffic;

Step 7_2, each simulation server (301 in FIG. 1 ) makes real-time statistics of the simulation results. Each simulation server performs real-time statistics of simulation data after its own simulation advances one clock cycle, so as to avoid the problem of excessive memory usage caused by centralized statistics;

Step 7_3, each simulation server (301 in FIG. 1 ) sends the boundary crossing data of people and vehicles to the regional coordination server (2 in FIG. 1 ). The data includes the current area and road, the crossed virtual port;

Step 8. The area coordination server (2 in FIG. 1 ) distributes the passenger-vehicle data across the simulated area of the server to each simulation server (301 in FIG. 1 ).

Step 9, each simulation server (301 in Fig. 1) updates the simulation area according to the received crossing data of people and vehicles;

Step 10, the area coordination server (2 in FIG. 1 ) judges whether the area switching time point has been reached. If the region switching time point has not been reached, then jump to step 12;

Step 11, carry out area switching coordination; this step is divided into 11_1, step 11_2, step 11_3, step 11_4, step 11_5;

Step 11_1, setting the current time period as the time period n, the simulation server m (m=1, 2, ..., M) (301 in Fig. 1) sends to the regional coordination server (2 in Fig. 1) The information of people and vehicles in the newly subtracted sub-region model m of time period n+1.

Step 11_2, setting the current time period as time period n, the regional coordination server (2 in Fig. 1) according to the newly added sub-area model m (m=1, 2, ..., M of time period n+1) ) sorting and sorting the received passenger and vehicle information in the newly subtracted sub-region model m (m=1, 2, . . . , M).

Step 11_3, setting current time period as time period n, regional coordination server (2 among Fig. 1) sends to emulation server m (m=1,2,...,M) (301 among Fig. 1) The passenger and vehicle information of the newly added sub-area model m in time period n+1.

Step 11_4, set the current time period as time period n, simulation server m (m=1, 2, ..., M) (301 in Fig. 1) utilizes the regional simulation model m of time period n+1 to replace For the area simulation model m in the time period n, update the area simulation model m according to the received passenger and vehicle information of the newly added sub-area model m;

Step 11_5, setting current time period as time period n, regional coordination server (2 among Fig. 1) and emulation server m (m=1,2,..., M) (301 among Fig. 1) will The current time period is set to time period n+1; skip to step 7;

Step 12, the regional coordination server (2 in FIG. 1 ) judges whether the simulation end condition is met. If the simulation end condition is not met, then jump to step 7 and perform the simulation of the next clock cycle;

Step 13, each emulation server (301 among Fig. 1) sends regional emulation result to regional coordinating server (2 among Fig. 1), and regional coordinating server (2 among Fig. 1) statistics simulation result, display output;

Step 14, exit this traffic simulation.

In order to verify the feasibility of distributed traffic simulation given workflow technology, the inventor adopted the establishment of a simulated road network (total length of 570 kilometers) as shown in Figure 4, and the time period was set from 19:00 of the current day to 19:00 of the next day .

The area division scheme in the simulation process is shown in Figure 5. By analyzing the distribution of people and vehicles in the simulation area and the travel plan data, the simulation process is divided into six time periods, namely 19:00 of the current day-6:00 of the next day, 6:00-7:00, and 7:00-8 :00, 8:00-9:00, 9:00-17:00, 17:00-18:00 and 18:00-19:00. In different time periods, population activities have different activity demands, and their location and required travel will also change accordingly. Figure 5(a)-Figure 5(f) are the regional division results of these six time periods, and the dotted line in the figure is the boundary of the regional division. It can be seen from Figure 5 that the area divisions in different time periods are significantly different. Through the adjustment of area divisions, the system divides the simulation tasks in a balanced manner to improve the utilization of the simulation server.

In the verification process, when the existing fixed area division method is used, the total time-consuming reaches 6.4 hours. After adopting the variable area division method of the present invention, the time is shortened to 3.7 hours, and the simulation time is significantly shortened, which meets the traffic plan evaluation requirements. need.

To sum up, the distributed traffic simulation system and simulation method based on variable area division of the present invention have the following beneficial effects:

(1) Compared with the existing method, the variable area division method is adopted to allow the area division to adapt to the change of the population tidal flow, avoiding the unbalanced load of the simulation server caused by the population tidal flow, and improving the running speed of the distributed simulation;

(2) After the simulation speed is increased, it will be possible to optimize the dispatch and control of traffic in large cities based on simulation.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A distributed traffic simulation system, characterized in that, comprising: The area division server is used to provide road network files and area division schemes corresponding to N time periods, including: a road network file library for storing road network files; a dynamic area division scheme management module for loading road network files, based on The road network file and the time period generate the corresponding area division scheme; the area division scheme library is used to store the area division scheme sequence composed of a plurality of area division schemes; The regional coordination server is connected to the regional division server, and is used to generate a full road network model according to the road network file, and for each of the N time periods, convert the full road network model from the Decompose the regional division scheme corresponding to the time period, generate M regional road network models, and distribute the regional road network models to the corresponding regional simulation servers, including: The road network and area division scheme loading module is used to: ① load the road network file from the road network file library, and generate a whole-area road network model including all areas according to the road network file; ② load the area division scheme sequence from the area division file library , according to the regional division scheme, copy all the regional road network models from the whole regional road network model; ③ generate a virtual port for describing the connection relationship between regions for the mth region in the nth time period; ④ For each area switch, generate new sub-areas and new subtracted sub-areas for each simulation server; The regional population entry and exit coordination module is used to: ① receive the first road network passenger-vehicle data leaving the simulation area sent by each simulation server; ② arrange the received first road network passenger-vehicle data according to the area that people and vehicles are about to enter; ③ Send the sorted first road network passenger and vehicle data entering the corresponding simulation area to each simulation server; The regional model switching coordination module is used for: when switching regions, ① receive the sub-regions that are about to be removed from each simulation server, that is, the second road network passenger and vehicle data of the newly-subtracted sub-region; Regional arrangement of the received second road network person-vehicle data; ③ sending the second road network person-vehicle data corresponding to the newly added sub-areas to each simulation server; The simulation result statistics module is used to: ① Obtain simulation data from simulation servers in various regions, and count the simulation results; ② Display the simulation results to users; The regional simulation server group is composed of M regional simulation servers; each simulation server in the M simulation servers is connected to the regional coordination server for each time period in the N time periods , carry out traffic simulation according to the regional road network model of the area under the jurisdiction of this time period. 2. The distributed traffic simulation system according to claim 1, wherein the N time periods include: the time period from the morning peak starting point to the morning peak midpoint; the time period from the morning peak midpoint to the morning peak end point ; the time period from the end of the morning peak to the start of the evening peak; the time period from the start of the evening peak to the midpoint of the evening peak; and the time period from the midpoint of the evening peak to the end of the evening peak. 3. distributed traffic simulation system according to claim 1, is characterized in that, described regional coordination server also comprises: The simulation control module is used to perform: ①preparation for simulation; ②starting simulation; ③pause simulation; ④termination of simulation; The server communication configuration module is used to configure the name, number, IP address and port information of the regional coordination server and each simulation server. 4. distributed traffic simulation system according to claim 1, is characterized in that, described regional simulation server comprises: The regional road network information loading module is used to: ① receive the regional road network model sequence of the area under the jurisdiction of the server from the regional coordination server; ② receive the virtual port information of the area under the jurisdiction of the server from the regional coordination server; ③ receive from the regional coordination server The newly added sub-area and the newly-subtracted sub-area for each area switching of this server; The regional simulation module is used for: ① simulating the regional road network model sequence and counting the simulation results in real time; ② sending the regional simulation results to the regional coordination server; The area switching module is used for: when switching areas, ①sending the sub-area to be removed to the area coordination server, that is, the road network passenger and vehicle data of the newly reduced sub-area; Regional road network passenger and vehicle data; The regional pedestrian and vehicle entry and exit management module is used to: ① send the data of people and vehicles that are about to leave the area through the virtual port to the regional coordination server; ② receive the data of the people and vehicles entering the area through the virtual port sent by the regional coordination server. 5. A distributed traffic simulation method, characterized in that, comprising: In step A, the area division server generates a sequence of area division schemes corresponding to different time periods according to the time period and the stored road network files, including: Step A1, the regional division server reads the road network file; Step A2, the area division server generates the passenger-vehicle data and OD matrix; Step A3, divide the entire time period into N time periods, estimate the distribution of people and vehicles in the road network in these N time periods, and give N kinds of area division schemes according to the distribution of people and vehicles and the travel plan, and use multiple areas The division plan constitutes a sequence of area division schemes; Step B, the regional coordination server generates a full road network model according to the road network file, and for each of the N time periods, decomposes the full road network model by the area division scheme corresponding to the time period , generating M regional road network models, and distributing the regional road network models to corresponding regional simulation servers; Step C, the mth simulation server in the regional simulation server group, for the nth time period in the N time periods, performs traffic simulation according to the regional road network model of the area under the jurisdiction of the time period, the m =1, 2, ..., M, said n=1, 2, ..., N, including: Step C0, the regional coordination server and the mth simulation server prepare for simulation; Step C1, the regional coordination server sends a start simulation signal to each simulation server; Step C2, each simulation server completes the single-cycle simulation operation forward simultaneously; Step C3, the regional coordination server distributes the passenger-vehicle data and travel plan across the simulated area of the server to the mth simulation server; Step C4, the mth simulation server updates the area simulation model m according to the received data of people and vehicles crossing; In step C5, the regional coordination server judges whether the region switching time point has been reached, and if the region switching time point has not been reached, jump to step C7; Step C6, carry out zone handover coordination, and jump to step C2; In step C7, the regional coordination server judges whether the simulation end condition is met, if the simulation end condition is not met, jump to step C2, and perform the simulation of the next clock cycle; Step C8, counting the simulation results and displaying the output, and the traffic simulation ends. 6. The distributed traffic simulation method according to claim 5, characterized in that, in the step A3, the N time periods include: Time period from morning peak start to morning peak midpoint; morning peak midpoint to morning peak end; morning peak end to evening peak start time; evening peak start to evening peak midpoint; and evening peak The time period from the midpoint to the end of the evening peak. 7. The distributed traffic simulation method according to claim 5, wherein said step B comprises: Step B1, the regional coordination server reads the road network files and the corresponding regional division scheme sequences in the road network file library and the regional division scheme library on the regional division server; Step B2, generating a regional division scheme sequence model according to the road network file and the regional division scheme sequence, and distributing the regional road network model to a corresponding regional simulation server. 8. The distributed traffic simulation method according to claim 5, wherein said step C0 comprises: Step C0a, compare the difference between the mth regional road network model in the nth time period and the regional road network model m in the n-1th time period, and generate the mth regional road network in the nth time period The newly added sub-area model and the new subtracted sub-area model of the model, the number of the newly added sub-area model and the new subtracted sub-area model is m; Step C0b, the m-th simulation server reads the m-th regional road network model in the n-th time period from the regional coordination server according to the sequence of numbers; Step C0c, the m-th simulation server reads the m-th new sub-region model and the m-th newly-deleted sub-region model in the n-th time period from the regional coordination server according to the order of numbers; Step C0d, the m-th simulation server reads the virtual port information of the m-th regional road network model in the n-th time period from the regional coordination server according to the sequence of numbers; In step C0e, the regional coordination server and the mth simulation server set the current time period as time period 1; the mth simulation server loads the mth regional road network model within time period 1. 9. The distributed traffic simulation method according to claim 5, wherein said step C2 comprises: Step C2a, each simulation server simulation advances one clock cycle forward; Step C2b, real-time statistics of the simulation results of each simulation server; In step C2c, the mth simulation server sends the border crossing data of people and vehicles to the regional coordination server, and the data includes the current area and road, and the crossed virtual port. 10. The method according to claim 5, wherein said step C6 comprises: Step C6a, set the current time period as the nth time period, and the simulation server m sends the information of people and vehicles in the newly reduced sub-region model m of the n+1th time period to the regional coordination server; Step C6b, set the current time period as the nth time period, and the regional coordination server sorts and sorts the received passenger and vehicle information in the newly reduced subregion model m according to the newly added subregion model m in the n+1th time period; Step C6c, set the current time period as the nth time period, and the regional coordination server sends the passenger and vehicle information of the newly added sub-region model m in the n+1th time period to the simulation server m; Step C6d, set the current time period as the nth time period, the simulation server m replaces the regional simulation model m of the nth time period with the mth regional simulation model of the n+1th time period, according to the received mth time period A new sub-area model of the passenger-vehicle information update area simulation model m; Step C6e, set the current time period as the nth time period, and the regional coordination server and simulation server m set the current time period as the n+1th time period; skip to step C2.

Images