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Link stability assessment method in VANET (Vehicular Ad-Hoc Network)

A technology of stability and link, applied in wireless communication, network topology, electrical components, etc., can solve the problem of less research on VANET topology connectivity

Inactive Publication Date: 2013-04-17
WUHAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, there is relatively little research on VANET topological connectivity, which is a prerequisite for vehicular networks to provide reliable services.

Method used

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  • Link stability assessment method in VANET (Vehicular Ad-Hoc Network)
  • Link stability assessment method in VANET (Vehicular Ad-Hoc Network)
  • Link stability assessment method in VANET (Vehicular Ad-Hoc Network)

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Embodiment Construction

[0027] The technical scheme of the present invention can adopt computer software process to realize automatic operation during concrete implementation. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.

[0028] Embodiments provide a link stability evaluation method in VANET comprising the following steps:

[0029] 1. Set the vehicle node speed according to figure 1 The decomposition shown is horizontal to the road and perpendicular to the road. figure 1 Among them, d is the distance between two cars, v i is the speed of the vehicle, θ represents the angle between the relative speed of the two vehicles and the horizontal direction of the road, v ix is the vehicle speed decomposed in the horizontal direction of the road, v iy is the amount of vehicle speed decomposed in the direction perpendicular to the road.

[0030] 2. Let the functional relationship between vehicle nodes and time t be:

...

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Abstract

The invention relates to a link stability assessment method in a VANET (Vehicular Ad-Hoc Network). The link stability assessment method in the VANET comprises the following steps of: resolving the velocity vector between two vehicles into Vx at the parallel direction of a road and Vy at the vertical direction of a road; assessing the duration time delta t of a link formed between two vehicles according to the current distance d between two vehicles, the maximal wireless transmission distance of vehicle nodes as well as the current velocity Vx; and calculating the credibility for the assessed and calculated duration time. The link stability assessment method in the VANET can be used for selecting the next hop transmission node of a data package through calculating the stability of the link, and can be used for improving the link robustness, improving the throughput rate of the whole path, and reducing the transmission time delay of the data package.

Description

technical field [0001] The invention relates to the technical field of wireless network communication, in particular to a link stability evaluation method under the VANET environment. Background technique [0002] In VANET (VehicularAd-hocNETwork, vehicle self-organizing network), the nodes move fast, the network topology changes quickly, and the link is easy to break. Therefore, we hope to find a method that can calculate the connection time of the link and the reliability of the connection time. method. This method can be applied to route selection to improve the performance of the whole path. [0003] Routing selection is a key factor in wireless network communication, which determines the throughput rate and transmission delay of the network, and directly affects the overall performance of the network. This is covered in almost all technical literature and research papers on routing protocols for wireless networks. Related literature: LEE J W, CHUN C L, SHIH P T, "A h...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W84/18
Inventor 黄传河徐利亚李鹏朱钧宇
Owner WUHAN UNIV
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