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Trans zone quick switching method for rail communication radio local area network

A wireless local area network and fast handover technology, applied in the field of communication, can solve the problems of inability to use wireless local area network transceiver equipment, no effective and feasible cases, etc., to achieve the effect of simple structure, seamless handover and fast handover

Inactive Publication Date: 2007-04-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the searched literature is concerned, this technology has not been widely commercially verified.
In addition, this technology requires a comprehensive update of existing WLAN equipment and cannot utilize existing WLAN transceiver equipment
There are also many studies in this field in China, but no effective and feasible cases have been found

Method used

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  • Trans zone quick switching method for rail communication radio local area network
  • Trans zone quick switching method for rail communication radio local area network
  • Trans zone quick switching method for rail communication radio local area network

Examples

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Embodiment Construction

[0025] A preferred embodiment of the present invention is described in detail as follows:

[0026] In this embodiment, the train takes the Shanghai Metro Line 1 vehicle as an example. Each car is 23 meters long, and there are 6 cars in total. The length of the whole train is about 140 meters. In this embodiment, the trackside wireless transceiver device adopts WLAN wireless access device AP, its communication protocol adopts 802.11g communication standard, and its effective signal coverage distance in the tunnel is about 100 meters.

[0027] The present invention is a wireless local area network cross-area fast switching method for rail communication, which is jointly implemented by the vehicle-mounted wireless transceiver equipment arranged on the rail train 10 and the trackside wireless transceiver equipment arranged next to the track 20. It is characterized in that, in the Described rail train 10 tailgates are provided with a described vehicle-mounted wireless transceiver d...

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PUM

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Abstract

This invention relates to a method for quick switch of cross the region of WLAN used in railway communication, which sets up train-ground communication between train-carrier radio transceiver set on the orbit train and that set beside the orbit characterizing in setting at least two train-carried radio transceivers on the train and said transceivers set by the side of orbit are distributed along the orbit , the train-carried device tests the signal strength of the adjacent by-the-side of the orbit devices timely, and a pair with the strongest signal sets up a train-ground working link for communication, when the signal strength is smaller than a scheduled one, it reselects a pair with the strongest signal as a new train-ground communication link, when the new one is started up to work to begin transmitting communication services carried by the original link, the original link is closed down so as to realize seamless quick cross the region switch.

Description

technical field [0001] The invention relates to the field of communication, especially the field of broadband wireless communication in rail transit, in particular to the problem of handover of communication networks, and in particular to a fast handover method of wireless local area network for rail communication. Background technique [0002] Rail transit is crowded with many passengers and is often overloaded. Once an emergency occurs, major accidents are likely to occur. Real-time video surveillance of rail transit has always been a key point in public safety work. [0003] In the prior art, the video surveillance technology of the subway station and the platform has been very mature and has been widely used, but the inside of the train, which is the most crowded place, is a blind spot of video surveillance. The main reason is to realize the real-time video surveillance of the subway train. Monitoring must meet the following three conditions at the same time: 1. A wirel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04L12/28H04W36/18H04W36/30
Inventor 贺辉郑国莘
Owner SHANGHAI UNIV
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