Traditionally, location systems have been built bottom-up beginning with low-level sensors
and adding layers up to high-level context. Consequently, they have focused on a single
location-detection technology. With sharing of user location in mind, we created Personal
Location Agent for Communicating Entities (PLACE), an infrastructure that incorporates
multiple location technologies for the purpose of establishing user location with better
coverage, at varying granularities, and with better accuracy. PLACE supports sensor fusion�…

Traditionally, location systems have been built bottom-up beginning with low-level sensors
and adding layers up to high-level context. Consequently, they have focused on a single
location–detection technology. With sharing of user location in mind, we created Personal
Location Agent for Communicating Entities (PLACE), an infrastructure that incorporates
multiple location technologies for the purpose of establishing user location with better
coverage, at varying granularities, and with better accuracy. PLACE supports sensor fusion�…