Wireless local area network switching method and device in rail transit

Abstract

This application discloses a wireless LAN switching method and device in rail transit. After using this solution to implement WLAN switching, the trackside access point that establishes a link with the vehicle-mounted access point is called the target trackside access point. The target The trackside access point is located in the direction of movement of the vehicle, and the target trackside access point is the trackside access point that established a link with the vehicle-mounted access point before switching from WLAN as the starting point, along the direction of movement of the vehicle. Among the multiple trackside access points, the trackside access point is closest to the vehicle-mounted access point. When random fluctuations of RSSI occur, compared with other trackside access points, the target trackside access point is less affected by the fluctuations, which can ensure the communication between the vehicle-mounted access point and the target trackside access point. to ensure the channel quality between the two devices to avoid invalid and mistaken switching. Moreover, since this solution avoids invalid and erroneous switching, it can also reduce business losses caused by frequent switching.

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...

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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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