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Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information

A technology of vehicle movement and direction information, which is applied in data exchange network, wireless communication, data exchange through path configuration, etc. It can solve the problems of performance degradation, affecting network performance, packet loss rate, and rising routing overhead.

Inactive Publication Date: 2009-02-25
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

Traditional mobile ad hoc network routing protocols do not consider the characteristics of vehicle-mounted mobile ad hoc networks, and their performance will decline significantly in urban vehicle-mounted mobile environments. When the node moving speed is high or the node density increases, the packet loss rate of the traditional protocol And routing overhead and other indicators have increased significantly, greatly affecting the performance of the network

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  • Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information
  • Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information
  • Method for selecting route of vehicle-mounted mobile ad hoc network based on direction information

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Embodiment Construction

[0027] The DARP routing method can greatly reduce the routing overhead of the vehicle-mounted mobile ad hoc network, and can improve the stability of routing, reduce the occurrence of routing disconnection, thereby improving the overall network performance, which is the main contribution of the invention.

[0028] For the process of source node generating routing request and establishing routing, see figure 1 shown.

[0029] figure 1 Describes the processing strategy of the source node when generating routing requests. In the DARP method, we set the maximum lifetime of each active route to 30s, that is, it starts at the moment when the last data sent by this route is completed. If within 30s If there is no service using this route, delete this route in the routing table; when a node generates a routing request, if it finds that the routing table has a valid route to the destination node, it will directly use this route to send, and update this item in the routing table The l...

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Abstract

The invention discloses a method for selecting a vehicle-borne mobile ad hoc network router based on direction information, and belongs to the ad hoc network router research field. The method is characterized in that the router establishment stage includes the following steps: when receiving a routing request message, a node determines whether the node is a target node; when the node is not the target node, a direction determination strategy is employed; only when the self-travel direction and the direction deviation marked by an RREQ is in a tolerate range, the self routing table is just examined; and whether the RREP is replied to or an RREQ data packet is forwarded to a source node is adjusted according to whether the node has the effective router reaching the target node, wherein when the data packet is forwarded, the direction information in the RREQ is required to be updated to the movement direction of the node, otherwise, the data packet is discarded. By adopting the method, the disconnection time of the router in the vehicle-carried mobile ad hoc network is greatly reduced, and the routing overhead is greatly reduced, therefore, the method is a recommendable scheme.

Description

technical field [0001] A vehicle-mounted mobile ad hoc network routing method based on direction information belongs to the research field of vehicle-mounted mobile wireless ad hoc network routing. Background technique [0002] Ad Hoc network is a wireless network that can be quickly built at any time as needed, without any infrastructure support or central management. It originally originated in the field of American military research in the 1970s. It can realize the temporary interconnection of multiple mobile terminals within a limited range, and provides a flexible interconnection method for mobile communication terminals in the local area network. At present, the Ad Hoc network is mainly used in environments such as military communication, rescue after an earthquake or water fire. In addition, Ad hoc is also very suitable for occasions requiring temporary communication such as exhibition halls, meeting rooms, gymnasiums, classrooms, and trains. It can be predicted tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/28H04W40/04H04W40/24
Inventor 杨扬周贤伟安建伟米振强杨裕亮
Owner UNIV OF SCI & TECH BEIJING
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