In this paper, we propose a range-free localization scheme for wireless sensor networks (WSNs) using four beacon nodes (BNs) equipped with a directional antenna with special transmission capabilities for sending wireless beacon signals throughout the sensor network. Each beacon node rotates with a constant angular speed and broadcasts its angular bearings. A sensor node can determine its locati...

This paper presents Beacon, a technique that exploits the advantages of IP multicast to provide a low overhead system for network topology monitoring. Beacon is a self-organizing system which builds a self similar network topology that enables the system to converge very quickly even at a high degree of scalability. Another property of the Beacon system is that it does not require any interdoma...

In systems that achieve laser beam propagation through atmospheric turbulence by phase compensation with adaptive optics, the performance depends on the beacon’s spatial distribution. A formulation is obtained to calculate the anisoplanatic Strehl ratio of a phase compensated, focused beam for any beacon distribution and turbulence profile. Analytic results are obtained for several beacon geome...

This paper studies the problem of determining the position of beacon nodes in Local Positioning Systems (LPSs), for which there are no inter-beacon distance measurements available and neither the mobile node nor any of the stationary nodes have positioning or odometry information. The common solution is implemented using a mobile node capable of measuring its distance to the stationary beacon n...

In this paper, we develop a method to check the schedulability superframe with beacon-enabled mode in ISA100.11a Wireless Industrial Networks environment. Maximum length of time slot is added in the superframe to reduce the overhead, and deadline monotonic scheduling approach is proposed to analyze the system scenario. The simulation results indicate that our proposed method required less numbe...

Abstract A path planning for mobile beacon nodes is presented based on the node localization problem of WSN. The beacon nodes define the unknown node position by using ranging method of RSSI. By analyzing defects of a static trajectory, random trajectory, the beacon nodes move to the maximum coverage of unlocated nodes. The simulation result demonstrates that this algorithm obtains good localiz...

For the localization competition, we propose to deploy an indoor localization system based on Non-Uniform Sequence Based Localization (NU-SBL) algorithm. NU-SBL algorithm works by dividing the two dimensional localization space into faces on the basis of the ranked RSS from the deployed stationary beacon nodes. The algorithm requires the scaled floor plan of the building and the location coordi...