Performance and Accuracy Analysis of Range-free Localization Algorithms in Wireless Sensor Network

Wireless sensor networks (WSN) are widely used in many environments to perform various monitoring tasks. In many such tasks, node location exists as permanent system parameter and to determine the exact position or location of sensor nodes in WSN is a big challenge to achieve. To achieve this challenge, various algorithms have been implemented to provide better accuracy even if anchor node density is less. The first aim of the survey is to explore various proposed techniques second is to compare their performance with their traditional techniques based on the anchor density and third is project which all improvements leads to the low localization error.