Patent attributes
A radio frequency identification (RFID) network and methods thereof for tracking subjects in a closed environment includes distributing RFID readers across the environment, at least some being at environment entry points. Readers have unique reader identifiers and communicate with a computer system. These identifiers and reader locations are stored. The ingress and/or egress of subjects bearing passive RFID tags is acquired by reading the unique subject identifiers off the tags from up to forty feet along with the reader identifiers of the readers making the readings. This informs a map comprising positions, on an environment diagram, of the subjects. The status of the readers is maintained by receiving and analyzing status signals from the readers. A subject data store is maintained and includes the ingress/egress data and electronic addresses of the subjects. An instruction set data store, each set corresponding to one of a plurality of events, is also maintained.
