Research And Application Of Optimization Technology Of Microscopic Traffic Simulation System For Multi-user

In order to understand the temporal and spatial law of the change of urban traffic flow and solve the existing urban traffic congestion and other phenomena,it is necessary to use micro traffic simulation to simulate and solve the problem.However,the existing micro traffic simulation has some disadvantages,such as small scale,difficult expansion,and too much redundant data in data communication.Based on the above background,this thesis analyzes the characteristics and deficiencies of the existing micro traffic simulation system,proposes a micro traffic simulation engine architecture oriented to multiple users,and proposes a compression algorithm for micro traffic simulation data communication in order to solve the problem of redundant data in traffic simulation data communication.Finally,a set of online micro-traffic simulation system oriented to multiusers is designed and implemented.The main research contents and work of this thesis are as follows:(1)A multi-user-oriented distributed micro-traffic simulation engine architecture is proposed.In order to solve the problem that the existing micro traffic virtual simulation system can not support multi-user online simulation and it is difficult to scale up,a micro traffic simulation engine architecture for multi-user is proposed in this thesis.In this architecture,multi-engine simulation can be supported simultaneously.This thesis also compares the number of users of simultaneous online simulation supported by single simulation engine and multi-simulation engine through experiments.The experimental results show that a common computer can support 11 users of simultaneous online simulation in a map with a vehicle capacity of 550.(2)A compression algorithm for data communication of microscopic traffic simulation system is proposed.Aiming at the problem of excessive redundant data during data communication in the micro-traffic simulation system,a compression algorithm for simulation data communication is proposed.The algorithm can delete redundant data for each step of the simulation data,and retain the data information that has changed compared with the simulation data of the previous step,and use this algorithm to compress the traffic simulation data.The final experimental results show that this algorithm can reduce the size of the simulation data by 28.48%,that is,it compresses the simulation data and reduces the network pressure of the simulation data transmission.(3)Designed and implemented a set of multi-user-oriented micro-traffic simulation system.Based on the proposed distributed micro-traffic simulation engine architecture and incorporating the compression algorithm for micro-traffic simulation data,this thesis specifically designs and implements a set of distributed micro-traffic simulation system.And elaborated each function module in the system in detail,and finally tested the simulation system function through online simulation.The test results show that the multi-user-oriented micro-traffic simulation system designed in this thesis has the function of online simulation,and supports the characteristics of simultaneous online simulation of multiple users.