Intelligent traffic control system and method based on wireless Mesh ad hoc network

Abstract

The invention relates to an intelligent traffic control system and method based on a wireless Mesh ad hoc network. The control system comprises n traffic control nodes, m ZigBee area base stations, a mobile communication base station and a traffic control center, wherein the n traffic control nodes are positioned in all intersections, and all kinds of equipment in the n traffic control nodes are connected by an RS-232 / RS-485 bus; adjacent nodes realize a wireless Mesh ad hoc communication network by a ZigBee technology and exchange traffic data in real time; remote connection is carried out between each ZigBee area base station and the traffic control center by adopting GPRS / CDMA (General Packet Radio Service / Code Division Multiple Access) data transmission equipment through the mobile communication base station; and m and n are respectively integers of 1-100 and 2-256. The system organically combines an advanced ZigBee short-distance wireless communication technology and a modern intelligent network technology; and the control method of the invention adopts a self-coordinating intelligent distribution type control algorithm and can realize the optimal traffic signal control effect.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic control, in particular to an intelligent traffic control system based on a wireless Mesh ad hoc network and a method for traffic control thereof. Background technique [0002] With the rapid development of social economy and the acceleration of urbanization, the number of motor vehicles in major and medium-sized cities in China has increased rapidly, the situation of urban road networks has become more and more complex, traffic resources have become increasingly tense, and traffic congestion and congestion have become increasingly serious. . The effective way to improve the function of urban traffic system is not only to formulate reasonable urban traffic planning and strengthen road traffic construction, but also to establish an advanced and powerful urban traffic signal control system. [0003] At present, the traffic signal control system in service in most cities is still a tradit...

AI Technical Summary

Problems solved by technology

The patent publication number is: CN101079772A "intelligent traffic control system based on ZigBee wireless communication" is a kind of intelligent traffic control system using this technology, but this system only realizes the two-way connection between the control center and each intersection, and the traffic at each intersection Traffic flow and signal light status information need to be sent to the traffic control center for unified decision-making, while the optimization and adjustment of signal light timing depends solely on the control instructions issued by the traffic control center, and cannot be automatically realized based on intelligent perception and mutual coordination of data between adjacent intersections. It is concluded that the distributed computing advantages of ZigBee wireless sensor network are not fully utilized and brought into play. It is a typical centralized control system, and the network topology of the system adopts a cluster structure, which is more reliable than the Mesh network structure and less flexibility

Therefore, the overall robustness and fault tolerance of the above-mentioned traffic control system are not high, and the degree of intelligence is low. Once a failure occurs in a certain link of the centralized communication and control equipment, the actual performance of the system will be seriously affected. This situation is becoming more and more serious in traffic congestion. , it cannot be tolerated in the first-tier big cities that have high requirements on the control quality and stability of the traffic signal control system

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