Method and system for adjusting vehicle travelling state information transmitting rate

Abstract

The invention provides a method and a system for adjusting a vehicle travelling state information transmitting rate. The method comprises the following steps that: a vehicle inside a first management region transmits vehicle travelling state information receiving and transmitting records to roadside equipment to which the vehicle belongs through a base station of a third generation mobile communication network; the roadside equipment calculates network performance parameters of a WAVE-based wireless network according to the vehicle travelling state information receiving and transmitting records; a judgment on whether any network performance parameter surpasses a preset threshold value is made, an optimum transmitting rate value is calculated by using the network performance parameters if any network performance parameter surpasses the preset threshold value by judgment and the optimum transmitting rate value is broadcast to a vehicle inside a first coverage area through the WAVE-basedwireless network; and the vehicle in the first coverage area broadcasts the optimum transmitting rate value to the vehicle which is outside the first coverage range and inside the first management region by using a multi-hop router through the WAVE-based wireless network. By the method and the system of the invention, the vehicle travelling state information transmitting rate can be adjusted in real time and accuracy is enhanced.

Description

technical field [0001] The invention relates to vehicle wireless communication technology, in particular to a method and system for adjusting the transmission rate of vehicle driving state information. Background technique [0002] In the existing intelligent transportation system, the wireless network based on the IEEE 802.11p / 1609.x protocol suite (Wireless Accessin Vehicle Environment, WAVE) can be used between vehicles and roadside equipment in the intelligent transportation system, and between vehicles. to communicate. In the WAVE-based intelligent transportation system, each vehicle exchanges current traffic information with other vehicles and roadside equipment, and each vehicle can know the road condition information such as the occurrence of traffic accidents or traffic jams in advance, so as to accelerate, decelerate or Bypass and other corresponding operations make the entire intelligent transportation system safer. [0003] In the WAVE-based intelligent transpo...

AI Technical Summary

Problems solved by technology

If the sending rate of vehicle driving state information is increased, the receiving vehicle can obtain more timely and accurate vehicle driving state information, and then obtain more timely and accurate road condition information; but increasing the sending rate of vehicle driving state information will lead to The congestion of the wireless channel of the WAVE-based wireless network may cause the loss of some wirelessly transmitted vehicle driving status information sent by the sender's vehicle or high transmission delay, which cannot guarantee the stability and low delay of data transmission. It will affect the judgment result of the receiving party's vehicle on the current road condition information, and affect the driving safety of the receiving party's vehicle

[0005] To sum up, the existing WAVE-based intelligent transportation system cannot adjust the transmission rate of vehicle driving status information in real time, which affects the accuracy of vehicle driving status information sent by the sender’s vehicle

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