Wireless communication method and device between intersection traffic signal controller and traffic control center

Abstract

The invention provides a crossing traffic signal control machine, a traffic control center wireless communication method and an apparatus thereof. In the method, a wireless communication apparatus, which is based on a 3G technology and placed in the crossing traffic signal control machine, is used to realize wireless communication between the crossing traffic signal control machine and a traffic control center. The method comprises the following steps that: the crossing traffic signal control machine uploads data to the traffic control center; the traffic control center downloads data to the crossing traffic signal control machine. The crossing traffic signal control machine connects with a wireless communication apparatus through a network cable and forms a wireless connection with a 3G base station through the apparatus so as to access to a 3G network. And the crossing traffic signal control machine connects with a special relay server located in the traffic control center through a wired network of a 3G operator and finally accesses to a traffic control center network. Reliability is strong. The apparatus is easy to be installed and maintained. Original hardware and software of a wire communication system do not need to be modified. Compared to an original wire communication mode, the mode provided in the invention possesses obvious advantages in construction and operation.

Description

technical field [0001] This patent relates to the technical field of traffic information transmission, specifically, a method and device for real-time wireless transmission of traffic information. Background technique [0002] As modern society relies more and more on transportation, traffic control systems are getting more and more attention. The traffic control of urban roads is mainly the control of traffic signals. In the overall structure of the traffic signal control system, the communication layer between the traffic signal controllers distributed at each intersection and the server of the traffic control center is the key link of the whole system. It is the basis for the traffic control center to connect various traffic intersections, obtain real-time traffic conditions and implement intelligent traffic control. [0003] Current traffic information transmission schemes mainly include wired transmission schemes and traffic information transmission schemes based on th...

AI Technical Summary

Problems solved by technology

The wired transmission scheme mainly uses optical fiber access or leased telecommunication optical cables to transmit traffic signals. Although this method is stable and reliable, it has large construction costs, poor scalability, and inconvenient equipment maintenance. However, the traffic information transmission scheme based on the 2.5th generation mobile communication technology GPRS has relatively large limitations in terms of communication delay and data bandwidth in the process of traffic information transmission due to the shortcomings of the GPRS network technology itself.

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