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A link selection method and device

A link selection and link technology, applied in the field of network communication, can solve the problems affecting the normal communication of subway trains, communication interference, etc., and achieve the effect of improving anti-interference ability and avoiding abnormal communication

Active Publication Date: 2020-02-11
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a subway train passes through an area where a large number of wireless devices in the same frequency band are deployed, it will cause communication interference and affect the normal communication of the subway train

Method used

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  • A link selection method and device
  • A link selection method and device
  • A link selection method and device

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Embodiment Construction

[0018] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0019] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The application provides a method and device for selecting a link, and is applied to a vehicle-mounted access point AP in a wireless grid Mesh network. The vehicle-mounted AP is used for starting a first frequency section and a second frequency section, the link is established by the vehicle-mounted AP, a plurality of detected trackside APs of the first frequency section and a plurality of detected trackside APs of the second frequency section, and the first frequency section is a preferential frequency section. The method comprises the following steps: obtaining first signal strength of which the signal strength is highest from the signal strength of the detected trackside APs of the first frequency section; obtaining second signal strength of which the signal strength is highest from the signal strength of the detected trackside APs of the second frequency section; selecting one of the links corresponding to the first signal strength and the second signal strength to transmit data according to the first signal strength and the second signal strength. According to the method and the device disclosed by the application, the anti-interference property of a wireless link can be improved, and besides a communication failure caused by the ring formation of the links can be avoided.

Description

technical field [0001] The present application relates to the technical field of network communication, and in particular to a link selection method and device. Background technique [0002] Mesh (wireless mesh) network is a new type of wireless network architecture that provides support for AP (Access Point, Access Point) mobility. Therefore, Mesh network technology is often applied to rail transit. Taking the subway Mesh network as an example, a vehicle-mounted AP is installed on a subway train, and a trackside AP is installed at intervals beside the subway track. As the train moves at a high speed, link switching is performed between the vehicle-mounted AP and the trackside AP to realize Data transmission between subway train and control center. [0003] The current subway Mesh network mainly uses air interface signals to establish links and transmit data, and all links work in the same frequency band. When a subway train passes through an area where a large number of w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/20
CPCH04W48/20
Inventor 李明金
Owner NEW H3C TECH CO LTD
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