GPS-free indoor location tracking in mobile ad hoc network (MANET) using RSSI

More devices in the future will be connected to the Internet wirelessly and also these devices can move within the coverage area of the mobile network. A mobile ad hoc network consists of devices or nodes that are able to communicate among themselves. These nodes also serve as routers and can dynamically move around arbitrarily at any speed in any direction resulting in an ever-changing topology for the MANET. Due to the node mobility, the most challenging issue is to design a routing protocol that guarantees delivery of packets. In order to improve the network routing performance, a limited casting technique is adopted which requires the ability to establish position information. Once each node´s location is determined, the distance between nodes can be derived and the number of hops to the destination can be computed. A GPS-free indoor position tracking system has been developed that provides knowledge of the geometric location of nodes in a MANET.