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Stable Internet of Vehicles relay node selection method

A technology of relay nodes and Internet of Vehicles, which is applied in the direction of services based on specific environments, vehicle components, and vehicle-to-vehicle communication, and can solve problems such as performance fluctuations

Active Publication Date: 2018-02-02
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, with the change of vehicle density, the performance still fluctuates greatly

Method used

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  • Stable Internet of Vehicles relay node selection method
  • Stable Internet of Vehicles relay node selection method
  • Stable Internet of Vehicles relay node selection method

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Embodiment Construction

[0066] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0067] A stable vehicle networking relay node selection method mainly refers to the method of selecting a suitable relay node in a VANET with rapidly changing topological structure, so as to complete the multi-hop transmission of messages to reach the destination. Taking the following scenario as an example, the method is as follows.

[0068] In VANET, the network parameters are set as shown in Table 1. ...

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Abstract

The invention provides a stable Internet of Vehicles relay node selection method for selecting relay nodes in a single-hop area and accomplishing multi-hop transmission of message. The stable Internetof Vehicles relay node selection method specifically comprises the following steps: 1) obtaining optimal values Aopt of compression coefficients A under different vehicle density lambda by using an optimization method A in advance, and storing the optimal values Aopt as a data table of vehicles; 2) querying an Aopt value table by using the lambda estimation value of a selected area; if the lambdais not in the table, using the optimization method A to obtain the Aopt corresponding to the lambda; 4) performing iterative segmentation on the selected area by using a segmentation method based onindexes to find the final area block; and 5) selecting a unique node in the final area block by using an exponential backoff window to serve as a relay node so as to accomplish the selection of the relay node. The message transmission speed achieved by the method is independent from the vehicle density, and the performance bottle neck caused by overlarge or too small vehicle density in the traditional method is overcome, and the requirements for the computing performance of the local vehicles and the computing time consumption are reduced by budgeting the Aopt value table and using a query method.

Description

technical field [0001] The invention relates to an ad hoc network of connected vehicles, in particular to the selection of a relay node in the ad hoc network of connected vehicles. Background technique [0002] Vehicular Ad Hoc Network (VANET), as a new communication technology suitable for road environment, can effectively avoid vehicle collision accidents, improve vehicle safety and road traffic efficiency, and alleviate air pollution. The VANET network has the characteristics of unstable topology, nodes limited by road movement, and wide range of node density changes. These characteristics make it possible to select relay nodes in multi-hop transmission to ensure that messages are transmitted through relays in a real-time, reliable, and stable manner. Communication becomes an important proposition to be resolved. The selection of the relay node can obtain the location information of the neighboring nodes by the beacon interacting regularly in the network, so as to select...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/46H04W40/22H04L29/08
CPCH04L67/12H04W40/22
Inventor 曹敦葛亮
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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