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Link recovery method of hwmp prior tree routing mode

A link recovery and mode technology, applied in the field of communication, can solve the problems of not being able to take into account path maintenance overhead, small path recovery delay, etc., to achieve the effect of reducing path maintenance overhead, reducing path recovery delay, and improving overall performance

Active Publication Date: 2019-04-23
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the above-mentioned prior art, and propose a link recovery method of HWMP prior tree routing mode, which is used to solve the problems in the prior art that the path maintenance cost is small and the path recovery time delay is short technical issues

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  • Link recovery method of hwmp prior tree routing mode
  • Link recovery method of hwmp prior tree routing mode
  • Link recovery method of hwmp prior tree routing mode

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0033] refer to figure 1 , node A to node G together form a wireless Mesh network in the form of tree routing, in which node A is the root node, and other nodes are ordinary nodes, and the ordinary nodes and root nodes communicate with each other through the path established by tree routing.

[0034] refer to figure 2 , the present invention comprises the following steps:

[0035] Step 1, the root node periodically broadcasts RANN frames.

[0036] The HWMP protocol can establish a priori tree routing through two mechanisms: periodically broadcast Proactive RANN frames or Proactive PREQ frames, and this embodiment uses Proactive RANN frames:

[0037] Step 1a, root node A periodically broadcasts RANN frames;

[0038] Step 1b, ordinary node H receives multiple RANN frames from different paths, compares the size of the routing metric value ALM ...

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Abstract

The present invention proposes a link recovery method of the HWMP prior tree routing mode, which is used to solve the technical problem that the existing technology cannot take into account the small path maintenance cost and the short path recovery time delay; the implementation steps are: the root node periodically Broadcast RANN; ordinary nodes receive multiple RANN frames, store their backup parent node and the MAC address of the parent node respectively, and establish a priori tree routing from ordinary nodes to the root node; the current ordinary node unicasts data packets to the root node; Whether or not the ACK reply from the parent node is received determines whether the link is disconnected, and respectively uses the backup parent node method, the local link method or the method of re-establishing the routing tree to repair the disconnected link from the current common node to the root node. The invention has the characteristics of low network load and short repair time delay, and can be used in the wireless Mesh network WMN to quickly repair the disconnected link in the prior tree routing.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a link recovery method, in particular to a link recovery method of an HWMP prior tree routing mode, which can be used in a wireless Mesh network WMN (Wireless Mesh Network) for prior tree routing. Broken links are quickly repaired. Background technique [0002] WMN is a wireless multi-hop network, which has the characteristics of high bandwidth, easy deployment, and strong robustness. The Hybrid Wireless Mesh Protocol (HWMP) is the default routing protocol used in WMN networks, which consists of prior tree routing mode and on-demand routing mode. The prior tree routing mode uses periodically broadcasted Proactive PREQ frames or Proactive RANN frames to establish or update tree-like routes from ordinary nodes to the root node. Among them, the root node is responsible for maintaining the routing information in the network, and other nodes in the network are common nodes. Whe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/733H04L12/703H04L12/707H04L12/753H04L12/761H04L45/122H04L45/16H04L45/24H04L45/28
CPCH04L45/16H04L45/20H04L45/22H04L45/28H04L45/48
Inventor 刘乃安郭守震
Owner XIDIAN UNIV
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