At&t Intellectual Property I, L.p.

At+t Corp.

Ubisense Limited

Rupert William Meldrum Curwen

Andrew Martin Robert Ward

Peter Joseph Steggles

Stephen Edward Hodges

Joseph Francis Newman

Paul Michael Webster

A location system comprises a plurality of transponders whose locations are detectable by a base system. The base system interrogates (-) the transponders one at a time in accordance with a schedule of consecutive time slots. In response to a priority request received () from one of the transponders, the base system interrupts the schedule and interrogates substantially immediately () the signaling transponder so as to determine its location with minimal latency.

Location system and communication system

A system for monitoring the presence of persons within a zone, the system comprising: one or more remotely detectable markers, each capable of being carried by a person; a first sensor arrangement capable of identifying the presence of the body of at least one person within the zone; a second sensor arrangement capable of identifying the presence of at least one marker within the zone; and a processing arrangement responsive to the first sensor arrangement and the second sensor arrangement to generate an alarm signal if the first sensor arrangement identifies the presence of a body without the second sensor arrangement identifying a marker corresponding in a first predetermined manner to that body.

System for detecting intruders in a populated space

A location system comprises a plurality of transponders whose locations are detectable by a base system. The base system interrogates (-) the transponders one at a time in accordance with a schedule of consecutive time slots. In response to a priority request received () from one of the transponders, the base system interrupts the schedule and interrogates substantially immediately () the signalling transponder so as to determine its location with minimal latency.

Location system and communication

Growing community of inventors

Royston, United Kingdom

Rupert William Meldrum Curwen