Optimized deployment method of roadside units in Vehicle Ad-hoc Networks positioning

A roadside unit and car networking technology, applied in the field of car networking positioning and wireless positioning, can solve problems such as insufficient accuracy and reliability, and achieve the effects of reducing computational complexity, improving deployment efficiency, and optimal positioning performance

Active Publication Date: 2018-03-13
SOUTHEAST UNIV
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Problems solved by technology

Due to insufficient accuracy and reliability, the conventional Global Positioning System (GPS) and its improved technology a

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  • Optimized deployment method of roadside units in Vehicle Ad-hoc Networks positioning
  • Optimized deployment method of roadside units in Vehicle Ad-hoc Networks positioning
  • Optimized deployment method of roadside units in Vehicle Ad-hoc Networks positioning

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[0036] The technical solutions provided by the present invention will be described in detail below in conjunction with specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0037] The present invention uses geometric precision factors to measure the performance of the deployment mode, and provides a two-stage deployment strategy: firstly, simplify the problem to 1 coverage scenario of the roadside unit to find an optimal basic deployment mode; secondly, aim at K coverage In the scenario, the deployment of roadside units can be modeled as an optimization problem. Under the two positioning methods of RSS and hybrid TOA / DOA, the optimal combination of K-layer basic deployment modes is sought to minimize the regional average GDOP; finally, asynchronous particle swarms are used The optimization algorithm performs a heuristic search to obtain the globa...

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Abstract

The invention provides an optimized deployment method of roadside units in Vehicle Ad-hoc Networks positioning. The method comprises the following steps: adopting a geometric dilution of precision asa measurement index to evaluate a Vehicle Ad-hoc Networks positioning performance; and modeling the deployment problem of the roadside unit under the k coverage condition as that when modeling an optimization function, firstly, decomposing the k coverage roadside unit deployment problem into a simplified 1 coverage deployment problem, giving a basic deployment mode with the highest deployment efficiency through the geometric analysis of the deployment mode of each roadside unit, and then extending the basic deployment mode to a K coverage scene, seeking the spatial combination of a K-layer basic deployment mode and transforming the spatial combination into one optimization function, and after that, utilizing an asynchronous particle swarm optimization algorithm to solve the optimization function, so as to reduce the computational complexity, and carry out heuristic search on the deployment positions of the roadside units. The optimized deployment method of the roadside units in the Vehicle Ad-hoc Networks positioning provided by the invention can improve the deployment efficiency of the roadside units, and enable a system to obtain the best positioning performance by optimizing thedeployment positions of the roadside units under the K coverage scene.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning, and relates to a roadside unit (Roadside Unit, RSU) deployment technology in the field of vehicle network positioning. Background technique [0002] In the application of Vehicle Ad-hoc Networks (VANETs), vehicle positioning is an important and attractive application service. Due to insufficient accuracy and reliability, the conventional Global Positioning System (GPS) and its improved technologies are not suitable for vehicle networking application scenarios such as urban canyons and tunnels with strong multipath effects. Therefore, for these scenarios, the IoV positioning technology based on Roadside Unit (RSU) has attracted extensive attention in recent years. In the positioning of the Internet of Vehicles, the roadside unit can be regarded as a fixed and known positioning anchor node, which provides positioning measurement information through the VANET communication link between...

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Application Information

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IPC IPC(8): H04W16/18H04W16/22H04W24/02H04W24/06H04W4/021H04W4/44
CPCH04W16/18H04W16/22H04W24/02H04W24/06
Inventor 燕锋张瑞夏玮玮沈连丰胡静宋铁成
Owner SOUTHEAST UNIV
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