Hop-Distance Relationship Analysis With Quasi-UDG Model for Node Localization in Wireless Sensor Networks
In Wireless Sensor Networks (WSNs), location information plays an important role in many fundamental services which includes geographic routing, target tracking, location-based coverage, topology control, and others. One promising approach in sensor network localization is the determination of location based on hop counts. A critical priori of this approach that directly influences the accuracy of location estimation is the hop-distance relationship. However, most of the related works on the hop-distance relationship assume the Unit-Disk Graph (UDG) model that is unrealistic in a practical scenario. In this paper, the authors formulate the hop-distance relationship for quasi-UDG model in WSNs where sensor nodes are randomly and independently deployed in a circular region based on a Poisson point process.