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Data communication method and device

A technology of data communication and data message, applied in the field of communication, can solve problems such as lack of mobility and restriction of wireless freedom, and achieve the effects of ensuring accuracy, improving reliability, and avoiding loss

Active Publication Date: 2017-01-11
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the traditional wireless local area network (Wireless Local Area Networks, WLAN) technology, APs (AccessPoints, access points) are connected through a wired network. This wired connection determines that the AP in the wireless network still does not have mobility, which limits In order to solve this problem, the wireless mesh network (mesh network) technology was derived.

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Embodiment Construction

[0021] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] At present, Mesh network technology is widely used in rail transit. Taking the current subway Mesh network as an example, as long as the configuration allows and the wireless signal strength is appropriate, the vehicle AP can establish a Mesh link (Link) with the trackside AP. There is a certain degree of arbitrariness in this way of establishing links. In order to ensure the communication quality, the existing subway Mesh implementation method is generally to establish multiple Mesh Links, regularly detect the communication quality of each Mesh Link, and always select the one with the best communication quality. A good link is used as the main link to undertake the communication between the track...

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Abstract

The invention provides a data communication method and device, wherein the method comprises the following steps: a vehicular access point AP determines a pre-switched link; the vehicular AP receives a data message sent by a trackside switch through the pre-switched link and an original link; and, the vehicular AP is switched to the pre-switched link to perform data communication while receiving a unicast data message sent through the pre-switched link for the first time. By means of the data communication method and device provided by the invention, loss of the data message can be effectively avoided; zero packet loss of link switching is realized; and the reliability of the communication system is improved.

Description

technical field [0001] The present application relates to the technical field of communication, and in particular to a data communication method and device. Background technique [0002] In the traditional wireless local area network (Wireless Local Area Networks, WLAN) technology, APs (AccessPoints, access points) are connected through a wired network. This wired connection determines that the AP in the wireless network still does not have mobility, which limits In order to solve this problem, the wireless mesh network (mesh network) technology is derived. Since the Mesh network technology provides support for AP mobility, this also makes the Mesh network technology a major force in the communication technology of rail transit (such as subways, trains, etc.). [0003] At present, the application of Mesh network technology on the subway is developing very rapidly. In rail transit, CBTC (Communication Based Train Control System, train control system based on communication t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/08H04W36/18
CPCH04W36/0016H04W36/0066H04W36/08H04W36/18
Inventor 李明金
Owner NEW H3C TECH CO LTD