Method and device for selecting link

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

Active Publication Date: 2015-07-15
NEW H3C TECH CO LTD
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  • Application Information

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Problems solved by technology

When a subway train passes through an area where a large number of wireless devices in the same frequency band

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  • Method and device for selecting link
  • Method and device for selecting link
  • Method and device for selecting link

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Embodiment Construction

[0018] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. Rather, they are merely examples of devices and methods consistent with some aspects of the application as detailed in the appended claims.

[0019] The terms used in this application are only for the purpose of describing specific embodiments, and are not intended to limit the application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and...

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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] This application relates to the field of network communication technology, and in particular to a method and device for link selection. Background technique [0002] Mesh (wireless mesh) network is a new type of wireless network architecture that provides support for AP (Access Point) mobility. Therefore, Mesh network technology is often applied to rail transit. Take the subway Mesh network as an example. On-board APs are installed on subway trains, and trackside APs are installed at intervals beside the subway track. As the train moves at a high speed, link switching between on-board APs and trackside APs is implemented to achieve Data transmission between subway train and control center. [0003] The current Metro 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 wireless devices of the same frequency band ar...

Claims

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Application Information

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IPC IPC(8): H04W48/20
CPCH04W48/20
Inventor 李明金
Owner NEW H3C TECH CO LTD
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