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Method and device for refreshing media access control (MAC) items in Mesh mobile application network

A mobile application and network equipment technology, applied in the field of communication, can solve problems such as interruption of data flow, failure to update in time, high packet loss rate of link transmission, etc.

Active Publication Date: 2013-04-17
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, due to the unstable characteristics of wireless transmission, especially in high-speed mobile applications, it is impossible to ensure that the new Active link has a high-quality signal within a short time after switching, so the link transmission may have a high packet loss rate , if the multicast packets sent by the mobile AP are not sent to the peer fixed AP, the forwarding device in the network will not be able to update the learned MAC entries in time, resulting in interruption of data traffic

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  • Method and device for refreshing media access control (MAC) items in Mesh mobile application network
  • Method and device for refreshing media access control (MAC) items in Mesh mobile application network
  • Method and device for refreshing media access control (MAC) items in Mesh mobile application network

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Embodiment Construction

[0039] The core idea of ​​the present invention is: the mobile AP instructs the fixed AP to switch over the link through the heartbeat message, and the fixed AP notifies the network equipment to refresh the MAC entry.

[0040] The method for refreshing MAC entries in the Mesh mobile application network provided by the present invention will be described in detail below in conjunction with specific application scenarios. A network device (such as a switch), the mobile AP establishes link connections with different fixed APs during the movement process, including an Active link and other Dormant links at the same time, and the mobile AP performs link switching during the movement process , adjust the peer fixed AP that establishes the Active link, and periodically exchange heartbeat messages between the mobile AP and the fixed AP through the Active link or the Dormant link, such as image 3 As shown, the method includes:

[0041]Step 301, expand the heartbeat message so that th...

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Abstract

The invention relates to a method and a device for refreshing media access control (MAC) items in a Mesh mobile application network. The method comprises the steps of: sending a heartbeat message carrying a link switching indication and an MAC address of a flow receiving device to an opposite fixed AP of the new Active link by the mobile AP when a mobile access point (AP) acquires a new Active link; obtaining the link switching indication carried in the heartbeat message by the opposite fixed AP, and sending an address refreshing message to a network device according to the MAC address of theflow receiving device; and refreshing the MAC items by the network device according to the address refreshing message. The invention enhances the reliability of updating the MAC items in the Mesh mobile application network.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for refreshing MAC table items in a Mesh mobile application network. Background technique [0002] With the increasing demand for wireless communication in the market, MESH technology has been more and more widely used in transportation systems because of its flexible and fast network deployment. A typical networking solution in the transportation system is: fixed APs are arranged along the transportation lines to form MESH links with mobile APs on vehicles. Taking the subway application as an example, the track AP is installed on the tunnel and the mobile AP is installed in the subway car. As the subway train moves, the mobile AP and the track AP encountered dynamically form a MESH link for the equipment on the train to send and receive user data. , such as train control signals, running information, etc. As for the distant fixed AP, due to the weakening of the wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W40/24H04W84/18H04W92/20
Inventor 刘岸淘
Owner NEW H3C TECH CO LTD