Link disconnecting method and device

Abstract

The embodiment of the invention discloses a link disconnecting method and device. The method comprises steps that a main trackside AP detects the signal strength of an onboard AP; the main trackside AP transmits a link disconnecting request to the onboard AP when it is determined that the main trackside AP is required to disconnect a link to the onboard AP according to the detected signal strength; the onboard AP disconnects the link to the main trackside AP after receiving the link disconnecting request so as to switch a link. The method, by enabling the main trackside AP to participate in the link switching of the onboard AP, can enable the onboard AP to be capable of timely switching to a main trackside AP with superior communication quality, thereby improving the communication quality between the onboard AP and the main trackside AP.

Description

Technical field [0001] The present invention relates to the technical field of wireless mesh networks, in particular to a method and device for link disconnection. Background technique [0002] Mesh network is a "wireless mesh network", it is a "multi-hop" network, developed from the network based on ad hoc (point-to-point) mode, and is one of the key technologies to solve the "last mile" problem One. At present, Mesh network technology has become the main technology of rail transit communication technology. Typical rail transit scenes include subways and high-speed trains. [0003] At present, in order to ensure the communication quality of the train-mounted AP (Access Point, access point) and trackside AP, the on-board AP establishes a mesh link with each trackside AP that meets the communication conditions, and regularly detects the communication quality of each mesh link , Select the mesh link with the best communication quality as the main link to undertake the communication...

AI Technical Summary

Problems solved by technology

[0004] However, when the train passes the main trackside AP, because the vehicle-mounted AP only sends signals forward, this causes the signal strength received by the main trackside AP to be weaker than that received by the vehicle-mounted AP from the main trackside AP within a certain period of time. signal strength of

However, during this period, the vehicle-mounted AP will not disconnect the link with the main trackside AP (that is, the main link), resulting in poor communication quality between the trackside AP and the vehicle-mounted AP.

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