Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system applied to on board unit (OBU) and capable of avoiding wireless signal congestion

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: 2019-04-12
BEIJING SUREKAM CORP
View PDF7 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system applied to on board unit (OBU) and capable of avoiding wireless signal congestion
  • Method and system applied to on board unit (OBU) and capable of avoiding wireless signal congestion
  • Method and system applied to on board unit (OBU) and capable of avoiding wireless signal congestion

Examples

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, including the following steps:

[0065] Step 1. According to the azimuth b of the vehicle h and the azimuth b of the distant vehicle r Calculate the azimuth difference b between the two vehicles 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-correlation b Δ value, empirical value) to calculate the azimuth correlation value r b , as shown in the following formula 02:

[0068]

[0069] Step 3, the distance d between the far car and the car (the calculation formula adopts the general spherical geometric great circle distance formula) and D c (The value of d at the time of semi-correlation, empirical value) Calculate the distance correlation value r d , as shown in the following formula 03:

[0070]

[0071] Step 4, through the r b and r d Calcul...

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 remote vehicle and the own vehicle according to the position and driving direction of the remote vehicle.

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

[0087] The characteristic vehicle speed calculation module 13 of the remote vehicle weights the relative vehicle speed of the distant vehicle and the comprehensive correlation value, and calculates the total characteristic vehicle speed of the distant vehicle.

[0088] The characteristic vehicle speed calculation module 14 of the vehicle obtains the characteristic vehi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 present invention relates to the fields of computer technology and networked automobile technology, in particular to a method and system for avoiding wireless signal congestion applied to an OBU. Background technique [0002] With the maturity of relevant technical standards for connected cars, it can be expected that in a few years, the roads will be basically connected cars. According to the definition of many standards, connected cars are recommended to broadcast their own data at a frequency of 10HZ. [0003] OBU (the abbreviation of On board Unit), the literal translation is 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 vehicle, and the RSU-Road Side Unit is set up on the side of the road, and they communicate with each other through microwaves. When the vehicle passes the RSU at high speed, microwa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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