Road-vehicle cooperation-based communication method and equipment

A communication method and road-to-vehicle technology, applied in the field of intelligent transportation, can solve problems such as no specific implementation plan for handover is given.

Inactive Publication Date: 2011-11-23
BEIJING NUFRONT MOBILE MULTIMEDIA TECH
View PDF0 Cites 37 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of continuous driving, the vehicle needs to communicate with different RSUs, which involves the issue of how the vehicle switches between different RSUs. However, the 802.11p protocol does not give a...

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
  • Road-vehicle cooperation-based communication method and equipment
  • Road-vehicle cooperation-based communication method and equipment
  • Road-vehicle cooperation-based communication method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] Before specifically introducing the method, OBU and RSU in the present invention, the following two aspects are firstly introduced.

[0045] First, the channel model in the present invention.

[0046] In IEEE802.11p, two channels are defined: control channel (CCH) and service channel (SCH). figure 1 It is a schematic diagram of the transmission power and usage of SCH and CCH in the prior art.

[0047] Such as figure 1 As shown, IEEE802.11p allocates a total bandwidth of 75MHz for CCH and SCH, from 5.850GHz to 5.925GHz, divided into 1 CCH (identified as Ch178), 6 SCHs (identified as Ch172, Ch174, Ch176, Ch180, Ch182 and Ch184) and a reserved bandwidth of 5MHz. Among them, CCH has the largest transmission power and is responsible for transmitting wireless access vehicle environment (WAVE) short message (WSM) information and control information. The transmission power of SCH is relatively small, and it is responsible for transmitting QoS data. figure 1 The SCHs mar...

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 discloses a road-vehicle cooperation-based communication method and road-vehicle cooperation-based communication equipment. Based on a space model that each road side unit (RSU) comprises a service range and a control channel (CCH) range, a method for switching a service channel (SCH) and the CCH is adopted. At a CCH transmission interval, an on-board unit (OBU) can apply adjacent RSU2 for switching parameters to perform pre-switching, when switching conditions are accorded, the applied switching parameters are directly called to switch the CCH to adjacent RSU2, and the switching time delay is shortened; and at an SCH transmission interval, when OBU1 departs from the current service range of the RSU1, the RSU1 communicates with the RSU2 through vehicle-vehicle forwarding, and when OBU1 enters the service range of the adjacent RSU2, the applied switching parameters are directly called to switch the SCH to adjacent RSU2; therefore, the SCH is seamlessly switched under the condition that the service ranges of the two adjacent RSUs have no overlap area.

Description

Technical field [0001] The invention involves the field of intelligent transportation technology, which specializes in road car collaborative communication technology network, and specifically involves road car -based communication methods and equipment. Background technique [0002] The 802.11 protocol gives a typical switching process, which includes the following steps: [0003] Step 1: Workstations are connected to the current base station link. [0004] Step 2: The workstation receives the signal sent by the base station of the surrounding communities. Select the corresponding base station sending request with the corresponding signal -to -noise ratio. [0005] Step 3: Workstation and selected base station exchange certification information. [0006] Step 4: Workstation sends a re -associated request to the selected base station. [0007] Step 5: Workstation and communication pairs create new links by selecting base stations and communicate. [0008] According to the above s...

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
IPC IPC(8): H04W36/18
Inventor 魏星徐洪刚何山罗志峰刘文海鲍东山
Owner BEIJING NUFRONT MOBILE MULTIMEDIA TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap