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Greed data forwarding method based on direction in vehicle-mounted network

A technology of in-vehicle network and forwarding method, applied in the field of greedy data forwarding based on direction, can solve the problems of inability to guarantee information accuracy, unstable neighbor relationship between nodes, outdated location information, etc., to achieve reliability and information accuracy , the effect is ideal, the application prospect is good

Inactive Publication Date: 2009-05-13
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

However, in the VANET network, due to the instability of the neighbor relationship between nodes caused by the rapid movement of nodes, the location information used in routing is outdated.
i.e. it does not guarantee the accuracy of the information

Method used

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  • Greed data forwarding method based on direction in vehicle-mounted network
  • Greed data forwarding method based on direction in vehicle-mounted network
  • Greed data forwarding method based on direction in vehicle-mounted network

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Embodiment Construction

[0036] The direction-based greedy data forwarding method in the vehicular network of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

[0037] Such as figure 1 As shown, the basic framework principle of the direction-based greedy data forwarding method in the vehicle-mounted network of the present invention-the research on the greedy direction-forwarding routing protocol of the vehicle-mounted ad hoc network. When the node has data to send, the location information of the destination node is updated according to the destination node location update message received periodically by the destination node, and the neighbor table is established and updated according to the periodic hello (beacon) message. Afterwards, the greedy forwarding strategy is adopted to forward the packets. If no suitable next hop is found, the forwarding mechanism will enter the direction and search for the next hop again. If forwardi...

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Abstract

A greedy data forwarding method of vehicle-mounted network based on direction comprises: source node transmits target node position request message in aimless flooding broadcasting style; target node periodically updates target node position message on every node in response to position request message of target node; every node periodically broadcasts and transmits beacon message in self one hop range; the message is provided by GPS; every node establishes and updates neighbor table according to node position information and movement direction information after receiving beacon message transmitted by neighbor node; data packet forwarding: data packet is forwarded according to greedy forwarding algorithm of ordinary geographical position route protocol; if proper next hop is not found, then direction forwarding is enabled. The inventive method combines traditional standard routing protocol, keeps many merits of existing mature routing protocol, and can be easily used in existing network without need of large range modification.

Description

technical field [0001] The invention relates to network communication. In particular, it relates to a direction-based greedy data forwarding method in a vehicle-mounted network based on greedy direction forwarding and reliable routing calculation of transmission data packets in a vehicle-mounted ad hoc network. Background technique [0002] Vehicles play a huge role in contemporary society. While the use of vehicles brings convenience to people's lives, it also brings some headaches, such as frequent traffic accidents and traffic jams. These problems directly threaten people's lives, bring great troubles to people's lives, and become problems that governments of all countries need to solve urgently. With the rapid development of wireless communication technology and the continuous improvement of automotive electronic technology, many governments and research institutions are trying to solve these problems by establishing an inter-vehicle communication (Inter-vehicle commun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/08H04W40/02
Inventor 金志刚罗咏梅闫宁霄张赛男
Owner TIANJIN UNIV
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