Method and device for switching wireless access points

Abstract

The invention discloses a method for switching a wireless access point, which can be used to simplify the switching process and shorten the switching time, thereby ensuring the network communication service between the vehicle and the ground, and improving user experience. The method includes: configuring a virtual trackside AP, and Send the attribute information of the virtual trackside AP itself to the multiple physical trackside APs, so that the multiple physical trackside APs have the same attribute information; Determine the target physical wayside AP whose signal strength is greater than the preset threshold among the physical wayside APs; The AP is virtually associated with the target physical trackside AP, so that the vehicle-mounted AP switches the target physical trackside AP. The present invention also proposes a wireless access point switching device, which is used to simplify the switching process and shorten the switching time. In this way, the network communication service between the vehicle and the ground is guaranteed, and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of vehicle-to-ground communication, in particular to a wireless access point switching method and device. Background technique [0002] With the popularity of the Internet, the communication network between the train and the ground in rail transit carries more and more services (such as video surveillance, multimedia broadcasting, and passenger Internet access, etc.), and the demand for network bandwidth is also increasing (such as from 10M to 100M or even Gigabit), in order to meet the increasing demand for vehicle-to-ground communication bandwidth, it is necessary to set up a vehicle-to-ground communication system based on WLAN technology for rail transit. [0003] In the existing vehicle-ground communication system based on wireless local area network (Wireless Local Area Networks, WLAN) technology, when the vehicle-mounted wireless access point (Access Point, AP) roams and switches between tracks...

AI Technical Summary

Problems solved by technology

[0003] In the existing vehicle-ground communication system based on wireless local area network (Wireless Local Area Networks, WLAN) technology, when the vehicle-mounted wireless access point (Access Point, AP) roams and switches between trackside APs, the vehicle-mounted AP switches between trackside APs It requires the interaction of multiple wireless data packets such as scanning, authentication, association, etc., such as figure 1 As shown, the existing association process requires four real message interactions, so the entire switching process will take longer. According to statistics, the switching process will take at least 2 to 4 seconds, which will seriously affect the connection between the vehicle and the ground. network communication services, poor user experience

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