Method for repairing route based on AODV and link fault type

A technology of link failure and repair method, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as low repair efficiency, and achieve the effects of improving overall performance, reducing control overhead, and shortening route establishment time

Inactive Publication Date: 2009-05-20
XI AN JIAOTONG UNIV
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Problems solved by technology

The disadvantage of this method is that, on the one hand, it ignores the possibility that a small-scale RREQ broadcast can also establish a route to the destination node; on the oth

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  • Method for repairing route based on AODV and link fault type
  • Method for repairing route based on AODV and link fault type
  • Method for repairing route based on AODV and link fault type

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Embodiment Construction

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

[0033] The core of the present invention is to adopt local fast repair when the route is faulty, which can improve the repair speed of the route and reduce the control overhead, which will be described in detail below.

[0034] The specific steps for a node to send a shutdown notification message are: first, the routing layer learns that the node will be shut down; then, the node uses RERR grouping, and the address of the unreachable node in the grouping is filled with the IP address of the node; finally, the node broadcasts within one hop The RERR group notifies the nodes adjacent to it.

[0035] The specific steps for the node to receive the closing notification message are: first, the node receives the RERR packet; then, the node takes out the unreachable node address in the packet, if the address is the same as the node address sending the RERR pack...

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Abstract

The invention discloses a route repair method based on AODV and a link failure type, which requires that a mobile node broadcasts a close notification message before the close. An upstream node at the disconnection position of a link initiates a local repair process. Firstly, the upstream node broadcasts a route request packet within the range of one hop; if the upstream node receives a close notification message from a downstream node, the upstream node tries to establish the route of a next two-hop node or a destination node of data packet to the upstream node; if the upstream node does not receive the close notification message from the downstream node, the upstream node tries to establish the route of a next one-hop node or the destination node of the data packet to the upstream node; and secondly, if the first route repair fails, the upstream node broadcasts the route request packet within the range of a network and tries to establish the route to the destination node of the data packet. The method can reduce the route repair time after the link is disconnected, reduce the cost for control packet needed by the route repair, and improve the performance of an Ad Hoc network.

Description

technical field [0001] The present invention relates to a route repairing method of an Ad Hoc network, in particular to a route repairing method based on AODV and link failure types. The present invention has no strict limitation on the network scale, and is especially suitable for the Ad Hoc network whose topological structure changes frequently . Background technique [0002] Routing protocol is one of the important technologies of wireless Ad Hoc network research in recent years. The routing protocol is responsible for the establishment and maintenance of routes. The routing protocol must be able to adapt to the rapid changes of the Ad Hoc network topology, provide nodes with accurate routing information, and at the same time minimize the control packet overhead to improve network performance. [0003] AODV (Ad hoc On Demand Distance Vector, Ad Hoc On Demand Distance Vector) is a typical on-demand routing protocol in Ad Hoc networks. It dynamically maintains routing tabl...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04W84/18H04L45/28
Inventor 曲桦赵季红张鹏赵季中
Owner XI AN JIAOTONG UNIV
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