01.12.2019  Research  Ausgabe 1/2019 Open Access
A WSN positioning algorithm based on 3D discrete chaotic mapping
1 Introduction
2 WSN node positioning methods
2.1 Computing methods of WSN node positioning
2.2 WSN node positioning algorithms
2.3 DVHOP algorithm
3 Improved DVHOP algorithm
3.1 Chaotic system and its optimization algorithm
3.2 Description of algorithm improvement

Step 1: Collecting the average hop count and position information of anchor nodes

Step 3: The unknown nodes calculate the initial position with formula 6 based on the average hop distance of anchor nodes in Step 2
4 Simulation experiment
Parameters  Numerical value 

Area of region  100 m × 100 m 
Simulation period  3600 
Subdomain amount  Less than 1024 
Nodes distribution method  Random distribution 
Distribution density of nodes in subdomain  No higher than 30 
Communication radius of nodes signal  20 m 
Nodes cache capacity  512 KB 
Emission period of nodes radiofrequency signal  60S 
Primary energy of nodes  5–20 J 