Wireless Local Area Network Channel Management Method in Rail Transport and Related Device

A trackside access point, wherein the trackside access point comprises a processor and a communications interface,

• the communications interface is configured to establish a wireless communication link to an in-vehicle access point;
• and
• the processor is configured to:
• change an operating channel of the trackside access point to the second channel, and instruct, by using the communications interface, the in-vehicle access point to change an operating channel of the in-vehicle access point to the second channel, when the wireless communication link has been established between the trackside access point and the in-vehicle access point, and a first channel and a second channel are different, wherein the first channel is an operating channel of the trackside access point before the operating channel of the trackside access point is changed, and the second channel is an operating channel of another trackside access point.

A controller, wherein the controller comprises a processor and a communications interface,

• the communications interface is configured to connect to multiple trackside access points and perform signaling interaction;
• the processor is configured to determine that a first channel and a second channel are different, wherein the first channel is an operating channel of a first trackside access point, and the second channel is an operating channel of a second trackside access point;
• and
• the processor is further configured to:
• by using the communications interface, instruct the first trackside access point to change the operating channel to the second channel, and instruct the first trackside access point to send an instruction message, so as to instruct an in-vehicle access point to change an operating channel of the in-vehicle access point to the second channel.