Abstract: A system for locating a mobile device is disclosed. In one embodiment, the system includes a mobile device having a processor and a receiver, and at least three transceiver devices forming a network of transceiver devices. The mobile device and transceivers can transmit a request (REQ) packet by the mobile device; receive the REQ packet by the at least three transceiver devices; transmit, by a first one of the at least three transceiver devices receiving the REQ packet, a response (RSP) packet; and receive by at least some of the at least three transceiver devices the REQ and the RSP packet. The at least three transceiver devices that receive both the REQ and the RSP packet, the system determines a difference in arrival time between receiving the REQ packet and the RSP packet. The system can determine the location of the mobile device based on determined differences in arrival time.

Abstract: A system and method for locating a mobile device is disclosed. In a first embodiment, a system of provisioning multiple-tired location services is disclosed. The system includes a plurality of ultra-wideband devices forming a first level of a wireless infrastructure network and a plurality of location capable beacon devices forming a second level of the wireless infrastructure network. In a second embodiment, a method of providing location based services using location capable beacon devices is disclosed. In other embodiments a system for generating real-time safety alerts is further disclosed.

Abstract: A system and method for locating a mobile device is disclosed. In a first embodiment, a system of provisioning multiple-tired location services is disclosed. The system includes a plurality of ultra-wideband devices forming a first level of a wireless infrastructure network and a plurality of location capable beacon devices forming a second level of the wireless infrastructure network. In a second embodiment, a method of providing location based services using location capable beacon devices is disclosed. In other embodiments a system for generating real-time safety alerts is further disclosed.

Abstract: A system for locating a mobile device is disclosed. In one embodiment, the system includes a mobile device having a processor and a receiver, and at least three transceiver devices forming a network of transceiver devices. The mobile device and transceivers can transmit a request (REQ) packet by the mobile device; receive the REQ packet by the at least three transceiver devices; transmit, by a first one of the at least three transceiver devices receiving the REQ packet, a response (RSP) packet; and receive by at least some of the at least three transceiver devices the REQ and the RSP packet. The at least three transceiver devices that receive both the REQ and the RSP packet, the system determines a difference in arrival time between receiving the REQ packet and the RSP packet. The system can determine the location of the mobile device based on determined differences in arrival time.

Abstract: A system for estimating the location of a mobile device is discussed herein. In one embodiment, the system can include a mobile device having a processor and a receiver, and a network of transceiver devices. The transceiver devices can be paired into multiple transceiver pairs of transceiver devices within communication range. The mobile device and transceivers can transmit a range request (REQ) packet by one transceiver in a pair; receive the REQ packet by another transceiver in the pair; transmit a range response (RSP) packet by the another transceiver; receive REQ packets by the mobile device; and receive RSP packets by the mobile device. The system is configured to estimate the differences of distances from the mobile node to the first and the second transceiver node in pairs; and to determine a location of the mobile device based on the estimated distance differences of devices.