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Urban road traffic state detecting method based on vehicle ad-hoc network

A vehicle-mounted self-organization, road traffic technology, applied in the direction of road vehicle traffic control system, traffic control system, instruments, etc., to achieve the effect of high feasibility, accurate detection results, and reduced impact

Inactive Publication Date: 2015-04-22
NANKAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the detection problem of real-time traffic status of urban roads, and provide a method for detecting traffic status of urban roads based on vehicle self-organizing network

Method used

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  • Urban road traffic state detecting method based on vehicle ad-hoc network
  • Urban road traffic state detecting method based on vehicle ad-hoc network
  • Urban road traffic state detecting method based on vehicle ad-hoc network

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Embodiment Construction

[0034] as attached figure 1 As shown, the present invention proposes an urban road traffic state detection method based on a vehicle ad hoc network. in the attached figure 1 , RSU (including RSU 0 and RSU 1 ) and the probe vehicle will periodically broadcast BEACON messages containing their own state information, where the BEACON message broadcast by the RSU contains its own identification number and location information, and the BEACON message broadcast by the probe vehicle includes the license plate number, current location, and driving Record (the RSUs passed in the past period of time and the corresponding passing moments).

[0035] When the probe vehicle enters the wireless communication range of the RSU, it will receive the BEACON message from the RSU, and calculate the distance between itself and the RSU according to the information contained therein. The probe vehicle distances itself from the first RSU ( RSU 0 ) is recorded as its most recent moment through...

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Abstract

The invention provides an urban road traffic state detecting method based on a vehicle ad-hoc network. A vehicle with a wireless communication device and a GPS is selected as a traffic state 'probe' called as the probe vehicle hereinafter, communication between the probe vehicle and an RSU is achieved through the vehicle ad-hoc network, the RSU works out the time duration that the probe vehicle passes a tested road section according to the received state information and evaluates the traffic condition of the tested road according to the time duration the probe vehicle passes the tested road section. A self-adaptation window T algorithm is provided to adapt to constantly-changing traffic scenes of vehicle flow and to calculate the average passing time of all probe vehicles in a period of time. Finally, a simulation model is established for observation data of a real traffic scene, and the effectiveness of the simulation model is verified through a network simulator NS-2.

Description

technical field [0001] The invention relates to the fields of wireless network communication, urban road traffic management and the like, in particular to the real-time monitoring of urban road traffic status in a vehicle-mounted network. Background technique [0002] In recent years, traffic congestion has become a major problem facing cities. With the development of the automobile industry and the improvement of people's living standards, the number of private cars has also increased rapidly. Although the government has invested a lot of manpower, material resources, and financial resources to improve the carrying capacity of the urban transportation system, it still does not improve the situation that people waste a lot of time when traveling due to traffic congestion. In addition, vehicles in traffic congestion will also emit a large amount of exhaust gas, polluting the environment. [0003] The emergence of Vehicle Ad-hoc Networks (VANETs) provides new technical mean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/065
CPCG08G1/0133G08G1/065
Inventor 许昱玮徐敬东刘婷婷王健
Owner NANKAI UNIV
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