Link switching method under high-speed motion state, vehicle-mounted AP and system
A technology of high-speed motion and link switching, applied in the field of network communication, which can solve problems such as packet loss
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Embodiment 1
[0039] Embodiment 1 of the present invention provides a link switching method in a high-speed motion state, such as image 3 As shown, it specifically includes the following steps:
[0040] S301. Obtain the signal strength of the trackside AP monitored by the vehicle-mounted AP according to the preset monitoring rule.
[0041] In this step, the preset monitoring rule can be set according to the actual situation, for example, it can be set to periodic monitoring or real-time monitoring. The vehicle-mounted AP can monitor the signal strength of each trackside AP that can monitor the signal according to the preset monitoring rules.
[0042] Further, the vehicle-mounted AP can monitor the trackside AP by detecting the Beacon frame sent by each trackside AP, and determine the trackside AP that is being intercepted according to the MAC address and signal strength of the trackside AP that sent the Beacon frame carried in each Beacon frame. Next to AP information.
[0043] Furthermore, the v...
Embodiment 2
[0057] In Embodiment 2 of the present invention, a vehicle-mounted AP fault detection mechanism is provided for a vehicle-mounted AP, that is, a method for link switching of a vehicle-mounted switching device, such as Figure 4 As shown, it specifically includes the following steps:
[0058] S401: Detect the connectivity of the main communication link through which the vehicle-mounted switching device communicates through the vehicle-mounted AP by using the vehicle-mounted switching device connected to the vehicle-mounted AP according to a preset detection rule.
[0059] Furthermore, each subway car can also be equipped with on-board switching equipment, which is connected to the on-board AP externally, and can be connected internally to wired equipment in the car, such as a camera. It can also be connected to a dual-channel AP, which is the wireless in the car. The device provides an access point. Take a subway car as an example. When each subway car has an on-board AP, the link b...
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