Providing universal location services using a wireless E911 location network
James M. Zagami, S.A. Parl, Jeffrey J. Bussgang, Karen Devereaux Melillo · IEEE Communications Magazine · 1998
This article reviews the issues associated with the development of an E911 location network in light of the desire to leverage the E911 location network to provide universal non-cellular location-based services. The key issues are illustrated with a system originally developed for locating elderly patients with Alzheimer's disease.