Relative location in wireless networks

In ad-hoc networks, location estimation must be designed for mobility and zero-configuration. A peer-to-peer relative location system uses pair-wise range estimates made between devices and their neighbors. Devices are not required to be in range of fixed base stations, instead, a few known-location devices in the network allow the remaining devices to calculate their location using a maximum-likelihood (ML) method derived in this paper. This paper presents simulations using both a standard channel model and actual indoor channel measurements for verification. Both simulation and measurements show that a peer-to-peer relative location system can provide accurate location estimation using received signal strength (RSS) as a ranging method