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A method for route establishment under unidirectional link environment

A unidirectional link and routing technology, applied in network technology and communication technology, can solve the problem of high cost and reduce routing overhead and processing overhead.

Inactive Publication Date: 2009-10-28
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The purpose of the present invention is a method for establishing routing in a unidirectional link environment so that AODV can better support unidirectional links and is easy to implement, so as to improve the problem of high cost caused by overhead in the Hello method

Method used

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  • A method for route establishment under unidirectional link environment
  • A method for route establishment under unidirectional link environment
  • A method for route establishment under unidirectional link environment

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Embodiment Construction

[0068] Through the improvement of the Hello method, a new Hello2 method is obtained, and the Hello method and the Hello2 method are simulated through the NS2 simulator, and the performance of the two methods in key performance is compared, and the performance of the Hello2 method is effectively evaluated.

[0069] The specific working process of the Hello2 method:

[0070] (1) if Figure 4 As shown, when the source node S wants to find a route and initiates a route request process, it first extracts the neighbor node information (a) from its neighbor node list, and then combines it with RREQ to form an RREQ2 message. For the specific format of the RREQ2 message, see image 3 shown.

[0071] (2) After the intermediate node a receives the RREQ2 message sent by S, if it finds its own information in the neighboring node information, it proves that S can reach a, and at the same time, a can also reach S, that is, the distance between S and a The link is bidirectional. At this ti...

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Abstract

The invention discloses a method for setting up route in unidirectional links circumstance, which is suitable for ADHoc network field so as to reduce the impact of unidirectional links on the information transmission of ADHoc network. The method can facilitate the node to identify as early as possible the existence of the unidirectional links in setting up the route by adding the neighbor node information in a RREQ message, so as to reduce the unnecessary energy loss in retransmitting the message of unidirectional links and easily realize a better support for the unidirectional links in the process of AODV route. In addition, the means can transmit the Hello2 message periodically through every node to cut down the expenditure in Hello means. The invention can reduce the energy losses of the ADHoc network needed on such occasions as military operations, calamity aids, mobile conference, sensor network, etc., and can extend the service life of the nodes of non-energy supplement.

Description

Technical field: [0001] The invention relates to an improved method for the AODV routing process in an Ad Hoc network, in particular to a method for reducing routing overhead in a unidirectional link environment, which belongs to network technology and communication technology and is suitable for the application field of Ad Hoc networks. Background technique [0002] The Ad Hoc network is a peer-to-peer network with the characteristics of decentralization, self-organization, rapid deployment, and mobility. It is also called a multi-hop network or a self-organized network. Compared with the traditional cellular network, the Ad Hoc network does not have a central controller, and all nodes operate in a distributed manner, sharing network construction and management functions. It can be established and dismantled at any time, has strong fault tolerance and robustness, and is widely used in military operations, disaster relief and mobile conferences, sensor networks and other occ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/28H04L45/02H04W84/18
CPCY02B60/50Y02D30/70
Inventor 陈月云段国强
Owner UNIV OF SCI & TECH BEIJING
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