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A method and system for avoiding wireless signal congestion applied to OBU

A wireless signal and azimuth technology, applied in the fields of connected cars and computer technology, can solve problems such as wireless signal congestion, and achieve the effect of reducing transmission frequency and signal congestion.

Active Publication Date: 2020-06-02
BEIJING SUREKAM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation not only makes the own OBU do a lot of unnecessary calculations but also causes congestion of wireless signals

Method used

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  • A method and system for avoiding wireless signal congestion applied to OBU
  • A method and system for avoiding wireless signal congestion applied to OBU
  • A method and system for avoiding wireless signal congestion applied to OBU

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] According to a preferred embodiment of the present invention, a method for avoiding wireless signal congestion applied to OBU is proposed, which includes the following steps:

[0065] Step 1. According to the azimuth angle of the vehicle b h And the azimuth angle of the far vehicle b r Calculate the azimuth difference between the two cars b Δ , As shown in the following formula 01:

[0066] b Δ = B h -b r (01)

[0067] Step 2. According to b Δ And B c (Semi-related b Δ Value, empirical value) calculate the azimuth related value r b , As shown in the following formula 02:

[0068]

[0069] Step 3. The distance d between the far vehicle and the vehicle (the calculation formula adopts the general spherical geometric great circle distance formula) and D c (The value of d when semi-correlated, empirical value) Calculate the distance-related value r d , As shown in the following formula 03:

[0070]

[0071] Step 4. Pass the r b And r d Get the comprehensive correlation value r by ave...

Embodiment 2

[0084] Such as image 3 As shown, according to a preferred embodiment of the present invention, a system for avoiding wireless signal congestion applied to OBU is proposed, including:

[0085] The correlation value calculation module 11 calculates the comprehensive correlation value between each distant vehicle and the own vehicle according to the position and driving direction of the distant vehicle.

[0086] The relevant vehicle speed calculation module 12 calculates the relevant vehicle speed of the far vehicle according to the comprehensive correlation value and the vehicle speed of the far vehicle.

[0087] The far vehicle characteristic vehicle speed calculation module 13 weights the relevant vehicle speed and the comprehensive correlation value of the far vehicle to calculate the total far vehicle characteristic vehicle speed.

[0088] The characteristic speed calculation module 14 of the own vehicle obtains the characteristic speed of the own vehicle by combining the speed of t...

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Abstract

The invention provides a method and system applied to an on board unit (OBU) and capable of avoiding wireless signal congestion. The method applied to the OBU and capable of avoiding the wireless signal congestion comprises the steps that a comprehensive correlation value of each distance vehicle and a host vehicle is calculated according to the positions and travelling directions of the distancevehicles; the correlation vehicle speed of the distance vehicles is calculated according to the comprehensive correlation value and the vehicle speed of the distance vehicles; the correlation vehiclespeed and the comprehensive correlation value of the distance vehicles are weighted, and total distance vehicle characteristic vehicle speed is calculated; characteristic vehicle speed of the host vehicle is obtained by combining the vehicle speed of the host vehicle and the distance vehicle characteristic vehicle speed; and emission frequency of host vehicle data is calculated according to the characteristic vehicle speed of the host vehicle. The method applied to the OBU and capable of avoiding the wireless signal congestion has the advantages that wire signal emission frequency can be automatically changed; when congestion is encountered, the emission frequency is automatically reduced, and the signal congestion is reduced; the vehicle emission frequency at the tail of a congestion roadsection is close to normal emission frequency; and the vehicle emission frequency of an unblocked road section is not affected by a reverse congestion route.

Description

Technical field [0001] The invention relates to the field of computer technology and networked automobile technology, and in particular to a method and system for avoiding wireless signal congestion applied to OBU. Background technique [0002] With the maturity of related technical standards for connected cars, it can be expected that in a few years the roads will be basically connected cars. According to many standard definitions, connected cars are recommended to broadcast their own data at a frequency of 10HZ. [0003] OBU (the abbreviation of On board Unit), literally translates to the meaning of on-board unit, which is a microwave device that uses DSRC (Dedicated Short Range Communication) technology to communicate with RSU. In the ETC system, the OBU is placed on the car, and the RSU-Road Side Unit (RSU-Road Side Unit) is set up on the roadside to communicate with each other through microwave. When the vehicle passes through the RSU at high speed, the OBU and RSU use micro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/052H04W4/02H04W4/021H04W4/029H04B1/00G08G1/01
CPCG08G1/0104G08G1/0133G08G1/052H04B1/005H04W4/021H04W4/026H04W4/027H04W4/029
Inventor 李同高甘家华黄大伟赵文涛崔岳夏曙东
Owner BEIJING SUREKAM CORP