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Method and device for switching visible light wireless communication reception of moving vehicles

A wireless communication and switching device technology, applied in the field of communication, to achieve the effect of reducing bit error rate and improving communication quality

Inactive Publication Date: 2013-12-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem of selective switching between multiple points and communication interruption when the signal is not covered, the present invention proposes a method and device for receiving and switching visible light wireless communication

Method used

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  • Method and device for switching visible light wireless communication reception of moving vehicles
  • Method and device for switching visible light wireless communication reception of moving vehicles
  • Method and device for switching visible light wireless communication reception of moving vehicles

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Embodiment Construction

[0021] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0022] In the VCL system, LED street lamps are similar to base stations. The transmitted carrier signal is visible light emitted by LED street lamps. Its lighting range is its signal coverage. The visible light has strong directivity and propagates along a straight line. Driving vehicles communicate with street lamps. LED street lamps are used as signal transmitters, and vehicles are used as signal receivers. The two communicate through visible light. The main factor affecting performance is direct light, and the influence of diffuse reflection will be ignored in the process of calculating received power.

[0023] According to these characteristics, there will be two situations in the communication between the mobile vehicle and the LED street lamp. In the embodiment of the present invention, there are two situations in the communication between the mobi...

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Abstract

The invention discloses a method for switching visible light wireless communication reception of moving vehicles. The method comprises the steps that when a signal overlapping coverage area exists between adjacent sending ends, a message source with strong signal switching power is selected to be communicated with the signal overlapping coverage area; when a signal overlapping coverage area does not exist between the adjacent sending ends, the uncovered distance between the adjacent sending ends is calculated; time for entering the next sending end coverage range is calculated; through calculation of the data size in the time period, a buffering space of the data size is reserved in a terminal, and therefore network disconnection is not instantly displayed during the time period. The method is applied to communication switching of the vehicles and road lamps, and communication between the vehicles and the road lamps is successfully guaranteed.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for receiving and switching visible light wireless communication of a mobile vehicle. Background technique [0002] Visible Light Communication (VLC) is an emerging optical wireless communication technology developed on the basis of white light LED technology. Compared with traditional radio frequency communication and other optical wireless communications, visible light communication has the advantages of no electromagnetic interference, energy saving, integrated lighting and communication functions, green and harmless to human body, etc. It can be seen that VLC technology has great development prospects. [0003] Outdoor VLC is suitable for wireless short-distance communication in Intelligent Transportation Systems (ITS, Intelligent Transportation Systems). Currently, the wireless short-distance communication technologies used in ITS include WIFI and radio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04W36/18
Inventor 朱娜徐哲袁敏敏安桂敏
Owner JIANGSU UNIV
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