Topology-discovery-based data distribution method of vehicle self-organizing network

A technology of self-organizing network and topology discovery, which is applied in the direction of data exchange details, devices for providing special services in branch offices, electrical components, etc., can solve problems such as insufficient timeliness, and achieve the goal of improving reliability, reducing load, and reducing delay Effect

Inactive Publication Date: 2013-08-14
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In this scheme, after the vehicle receives the forwarding message, it obtains the information of the neighbor nodes through continuous active inquiry, and then determines the forwarding vehicle according to the mutual comparison of the neighbor nodes, which causes a certain degree of communication delay. Somewhat imperfect for higher vehicular ad hoc networks

Method used

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  • Topology-discovery-based data distribution method of vehicle self-organizing network
  • Topology-discovery-based data distribution method of vehicle self-organizing network
  • Topology-discovery-based data distribution method of vehicle self-organizing network

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Embodiment 1

[0047] In the vehicle self-organizing network, the ETSI TC ITS organization divides the information it exists into two categories: CAM and DENM. Among them, the CAM information mainly involves the basic information of the vehicle, such as the current position, speed, acceleration, and direction of motion. Vehicle transmission, so it is generally transmitted through a single hop; DENM information is triggered when an event occurs, such as accident alarms, safety alarms, vacant parking space messages, etc., and they need to be transmitted to the possible impact area of ​​the event in a timely and effective manner Therefore, it is generally transmitted through multiple hops.

[0048] According to the above two message types, the present invention defines two types of data message formats: safety message and event message, and the two messages are the concrete representations of CAM and DENM respectively. Considering that CAM is generally sent to surrounding vehicles periodically...

Embodiment 2

[0088] The present embodiment sets forth the technical solution of the present invention through specific simulations, specifically as follows:

[0089] This instance model is tested with network simulation software NS2. The size of the simulation scene is an area of ​​2250*2250 square meters, the number of intersections is 9 (3*3), the width of each lane is 5 meters, and the distance between intersections is 750 meters. The event message generation source is set in the central area of ​​the scene.

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Abstract

The invention provides a topology-discovery-based data distribution method of a vehicle self-organizing network. The method comprises the steps as follows: a broadcast cycle of a source vehicle is calculated, and an event message monitored by the source vehicle is broadcasted according to the broadcast cycle; the event message serves as a probe of topology discovery, and the source vehicle is colored according to a coloring principle; and waiting time for a receiving vehicle is calculated, after the receiving vehicle receives the event message, whether the event message is forwarded at the waiting time is determined, if yes, the receiving vehicle is colored dark grey, and the event message is broadcasted, otherwise, the receiving vehicle is colored grey, and the process is finished. The topology-discovery-based data distribution method of the vehicle self-organizing network defines the broadcast cycle of the source vehicle and the waiting time of the receiving vehicle, so that the time delay of message transmission is reduced effectively, the reliability of event message transmission is improved, the number of transcripts of event message in the network is controlled, and the network communication load is reduced.

Description

technical field [0001] The invention relates to the fields of wireless communication and intelligent transportation, in particular to a data distribution method of a vehicle ad hoc network based on topology discovery. Background technique [0002] Vehicle Ad Hoc Networks (VANETs) is a special kind of wireless ad hoc network, and it is also an important part of intelligent transportation system. It is an ad hoc network that applies wireless communication technology to inter-vehicle communication. In addition to solving inter-vehicle communication, it is also extremely important for traffic safety and the intelligence and convenience of vehicles. In addition to the basic characteristics of the wireless ad hoc network, the vehicle ad hoc network also has its own characteristics: first, the high-speed movement of the vehicle nodes will cause the intermittent connectivity of the network and the characteristics of the fast dynamic network topology, which will make it difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L12/18
Inventor 高志鹏杨杨杨树春芮兰兰亓峰邱雪松陈兴渝
Owner BEIJING UNIV OF POSTS & TELECOMM
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