Wireless local area network switching method and device in rail transit

Abstract

The present application provides a method and device for wireless local area network switching in rail traffic. After the WLAN switching is realized by using the solution, the rail side access point which establishes a link with the car carrier access point is called a target rail side access point and the target rail side access point is located in the moving direction of the vehicle. Besides, the target rail side access point is the rail side access point closest to the car carrier access point of the plurality of rail side access points along the moving direction of the vehicle which take the rail side access point establishing the link with the car carrier access point before the WLAN is switched as a starting point. When random fluctuation of RSSI occurs, the impact of the fluctuation on the target rail side access point is relatively smaller compared with that on the other rail side access points, which ensures the channel quality between the car carrier access point and the target rail side access point and avoids invalid error switching. Besides, since the present solution avoids invalid error switching, service loss caused by frequent switching can be reduced.

Description

technical field [0001] The present disclosure relates to the technical field of wireless networks, in particular to a method and device for switching wireless local area networks in rail transit. Background technique [0002] In order to meet the Internet access requirements of passengers in rail transit vehicles, a vehicle-to-ground communication system is currently provided for rail transit vehicles, and the vehicle-to-ground communication system adopts wireless local area network (English: wireless local area network, abbreviation: WLAN) technology. see figure 1 , the vehicle-ground communication system includes: a vehicle-mounted access point 1 , a trackside access point 2 and a switch 3 . Wherein, the trackside access point 2 is connected with the switch 3, and the trackside access point 2 is an access point (English: access point, abbreviation: AP) arranged beside the track, usually beside the track A plurality of trackside access points 2 are arranged, and the dista...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for switching wireless local area networks in rail transit, to a certain extent solve the problem that in the traditional technology, when switching wireless local area networks in rail transit, the switching occurs too frequently, or the switching becomes invalid switch problem

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