Analyzing the Performance of the Dynamic Position Location and Tracking (D-Pl&T) of Mobile Nodes Using Omni Directional Antenna in Manet

摘要

In this paper, we are focused to analyse the performance of the two dimensional dynamicPosition Location and Tracking (PL&T) of mobile nodes. The architecture of the dynamic PL&Tis developed based on determining the potential zone of the target node (s) and then trackingusing the triangulation. We assume that the nodes are mobile and have one omnidirectionalantenna per node. The network architecture under consideration is cluster based Mobile Ad HocNetwork (MANET) where at an instance of time, three nodes are used as reference nodes to tracktarget node(s) using triangulation method. The novel approach in this PL&T tracking method isthe “a priori” identification of the zone of the target node(s) within a circle with a reasonableradios, and then placing the three reference nodes for the zone such that a good geometry iscreated between the reference nodes and the target nodes to improve the accuracy oftriangulation method. The geometry of the reference nodes’ triangle is closer to equilateraltriangle and all potential target nodes are inside the circle. We establish the fact that when thetarget node is moving linearly, the predictive method of zone finding is sufficient to track thetarget node accurately. However, when the target node changes the direction, the predictivemethod of zone finding will fail and we need to place the three references outside the zone suchthat proper geometry with no one angle is less than 30 degrees is maintained to get accuratePL&T location of the target node at each instance of time. The new zone is always formed foreach instance of time prior to triangulation.In this paper, we demonstrate the accuracy of integrated zone finding and triangulation fordetecting the PL&T location the node at each instance of time within 1.5 foot accuracy. It shouldbe noted that as the target node is tracked continuously by applying the integrated zone findingand triangulation algorithm at different instances of time, one foot accuracy can no longer bemaintained. Periodically, the good PL&T data on each node has to be established byreinitializing the PL&T locations of the nodes including those that are used as reference nodes.In this paper, the performance of the dynamic PL&T system is derived using Additive WhiteGaussian Noise (AWGN) channel; and using AWGN plus Multi-path fading channel. The impactof multipath fading on tracking accuracy is analysed using Rician Fading channel for MANETapplications outdoors. Our real time simulations show the PL&T tracking accuracy for themobile target nodes in both cases to be within 1.5 foot accuracy.