Anchor Node Deployment Method for Wireless Location System Based on Received Signal Strength Indication

A technology of wireless positioning system and received signal strength, which is applied in the direction of location information-based services, wireless communication, genetic models, etc., which can solve the problems of reduced feature resolution and impact on positioning accuracy, and achieve the effect of good anchor node position coordinates

Active Publication Date: 2017-11-21
STATE GRID CORP OF CHINA +4
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Problems solved by technology

At this time, the corresponding RSSI positioning algorithm will greatly affect its positioning accuracy due to the failure of the attenuation model and the reduction of feature resolution.

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  • Anchor Node Deployment Method for Wireless Location System Based on Received Signal Strength Indication
  • Anchor Node Deployment Method for Wireless Location System Based on Received Signal Strength Indication
  • Anchor Node Deployment Method for Wireless Location System Based on Received Signal Strength Indication

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Embodiment Construction

[0047] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0048] The anchor node deployment method of the present invention analyzes the positioning performance of the system based on the average positioning error and signal coverage, and provides a corresponding joint optimization function based on the number of deployed anchor nodes. This method first uses a statistical model to describe the positioning error of the system, and models the time-varying signal strength parameters as a Gaussian distribution; then, for the disturbance problem in RSSI long-range ranging, based on the residual error of the fitting data, an effective method for avoiding disturbance is given. Threshold distance, and then filter the ranging information according to this threshold, get the spatial point set that meets the location coverage condition and calculate the coverage rate; finally, use the inte...

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Abstract

The invention discloses a method for deploying anchor nodes of a wireless positioning system based on RSSI. Average positioning errors and the signal coverage rate are comprehensively considered and are jointly optimized. Firstly, a statistic model is adopted to describe positioning errors of a system, and time-varying signal strength parameters are modeled as Gaussian distribution. Then, the threshold value distance measurement distance which can effectively avoid disturbance is given out based on a residual error of fitting data according to the disturbance problem in the RSSI distance measurement process of the nodes, distance measurement information is screened according to a threshold value to obtain a space point set which meets positioning coverage conditions, and the coverage rate is calculated. Finally, the average positioning errors and the signal coverage rate are used as the joint evaluation standard, meanwhile, the number of the deployed anchor nodes is considered, the anchor nodes are converted into a single object optimization function of deployment efficiency through a linear weighted sum method, the function is solved through a genetic algorithm based on integer coding, and therefore the optimal anchor node deployment position is obtained, and the positioning performance of the system is improved.

Description

technical field [0001] The invention relates to an anchor node deployment method in the wireless positioning field, in particular to a wireless positioning system anchor node deployment method based on received signal strength indication. Background technique [0002] The wireless positioning system based on Received Signal Strength Indication (RSSI) has attracted widespread attention due to its low complexity and convenient deployment. RSSI positioning technology mainly detects and analyzes the wireless signal strength, and performs positioning estimation by converting the signal strength value into distance information or directly extracting the mode characteristics of the signal. The self-position anchor nodes of these known positioning technologies have become a reliable means to improve the positioning performance. At the same time, more and more researchers have found that the geometric layout of the anchor nodes will have a great impact on the positioning performance ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W4/02G06N3/12
Inventor 张瑞夏玮玮沈连丰刘世栋章跃跃李炳林梁云缪巍巍贾子彦朱亮
Owner STATE GRID CORP OF CHINA
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