Patent application number | Description | Published |
20090273465 | ROOM SEPARATION IN A WLAN BASED RTLS AND METHOD THEREFOR - A wireless location system for tracking and locating a wireless tag in a structure having defined areas that provides for differentiation between the defined areas has at least one ultrasonic transmitter positioned in each of the defined areas for transmitting an ultrasonic signal having area identification and/or transmitter ID information. A plurality of wireless tags are provided wherein each wireless tag transmits a last area identifying and/or transmitter ID information received and accepted by the wireless tag in a tag message. A plurality of location receivers is installed in the structure for receiving the tag message and for reporting the received message from the tag along with optional measured parameters to a common server. The common server determines the location of each wireless tags in the structure using the defined area or transmitter ID as reported by each wireless tag. | 11-05-2009 |
20110050501 | LOCATION SYSTEM AND METHOD WITH A FIBER OPTIC LINK - A TDOA (time difference of arrival) location system, in which mobile wireless devices broadcast wireless signals which are received by two or more transceivers deployed in the vicinity of the mobile wireless device. Each transceiver measures the TOA (time of arrival) of the received broadcasted signal and reports the TOA to a central server. The central server then calculates the mobile device position using multi-lateration of TDOA values. The system uses fiber optic links between the antennas and the transceivers deployed in the location area to provide unique advantages that couldn't be achieved using RF coaxial cables. | 03-03-2011 |
20110195701 | SYSTEM AND METHOD FOR MOBILE MONITORING OF NON-ASSOCIATED TAGS - A system for monitoring at least one tag device has at least one mobile cellular telephone. The mobile cellular telephone is capable of communicating on a WiFi network, wherein the at least one tag device transmits wireless data messages in a non-associating mode. | 08-11-2011 |
20130035109 | Devices, Methods, and Systems for Radio Map Generation - Systems, devices, methods, and computer-readable mediums for generating a radio map of an area are disclosed. In one aspect, the device, method, and computer-readable medium perform processes that may include receiving in at least one processor first information associated with at least one wireless device at a first location in the area. The processes may include receiving in the at least one processor second information associated with at least one wireless device at a second location in the area and different from the first location. The first location within said area and the second location within the area are unknown to the at least one processor. The processes may also include generating a radio map of the area using the first information and the second information. | 02-07-2013 |
20130170374 | METHODS AND SYSTEMS FOR LOCATING DEVICES - Disclosed embodiments provide methods and systems for locating a device in a wireless network. In one aspect, a device may broadcast a signal, and one or more network components may measure the received signal strength of the signal. Based on the signal strength and/or at least one or more parameters, the one or more network components may determine whether to perform a round trip time measurement with the network device. The network components may perform the round trip time measurement based on the determination and report the results of the measurement to a server. The server may be configured to determine the location of the network device based on the round trip time measurement. | 07-04-2013 |
20140176305 | METHODS AND SYSTEMS FOR ASSOCIATING A TAG WITH AN ASSET - Methods and systems are disclosed that associate a wireless tag with an asset. A wireless tag may include a short range communication interface configured to communicate over a short range communication link with a short range communication component of an asset. The wireless tag may also include a long range communication interface configured to communicate over a long range communication link with a remote element. In one aspect, operations may include determining whether the wireless tag can communicate with the short range communication component and receiving asset information from the short range communication component over the short range communication link. Operations may also include sending the asset information and wireless tag information to the remote element over the long range communication link to generate an association between the wireless tag and the asset based on the asset information and the wireless tag information. | 06-26-2014 |
20140188432 | METHODS AND SYSTEMS FOR CALCULATING AND PRESENTING A POSITIONING PERFORMANCE OF A LOCATING SYSTEM - Disclosed embodiments provide methods and systems for calculating and presenting a positioning performance of a location system. In one aspect, a server may receive a signal including information indicative of a determined location of an asset. Based on the received signal, the server may determine a positioning error value indicating an error in the determined location of the asset. The server may then calculate a metric as a function of the positioning error value, and provide positioning performance information for display based on the calculated metric. | 07-03-2014 |
20150137946 | Enhanced Wireless Location System and Method - An identification tag has at least a controller, a receiver for receiving wireless signals from an exciter, and a transmitter for transmitting wireless signals to at least one location receiver (which may be a WLAN access point). The tag's controller can determine the presence of interference from sources unrelated to the location system, such as smartphones, tablets, computer monitors etc., and signal an alert accordingly. | 05-21-2015 |