| Wireless position location and tracking system -> Monitor Keywords |
|
|
 
Wireless position location and tracking systemWireless position location and tracking system description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080036661, Wireless position location and tracking system. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCES TO RELATED APPLICATIONS [0001] The Present application is a Continuation application of U.S. patent application Ser. No. 10/968,814, filed on Oct. 18, 2004, which claims priority to Provisional Application No. 60/513,784, filed Oct. 22, 2003, now abandoned, Provisional Application No. 60/528,052, filed Dec. 9, 2003, now abandoned, and Provisional Application No. 60/572,690, now abandoned, and all hereby expressly incorporated by reference herein. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Field of the Invention [0004] The present invention relates generally communications, and more specifically to a wireless position location and tracking system. [0005] 2. Description of the Related Art [0006] There is a well-established demand for the ability to track the location of various objects and/or persons within various environments. Owners of various assets may want to be able to locate those assets with precision at any time, in order to make efficient use of them (i.e. for deployment or re-deployment in response to varying demand). Security applications may include locating missing equipment, or preventing the loss of equipment. [0007] Satellite tracking systems, such as the Global Positioning System (GPS), and others, may be used to provide location determination around the globe. Satellite tracking systems generally do not perform well inside buildings, or in other locations where the satellite signals are not readily receivable. [0008] Radio Frequency Identification (RFID) systems are being developed to track and locate items within defined areas. Passive RFID systems are limited to detecting the presence of an item within range of a portal. Typically, a portal or interrogator sends out a query signal and any tag (i.e., a device included in or attached to an object to be tracked) within range responds. Passive RFID tags generally do not have a power source. [0009] Active RFID systems function in a similar manner, but the active tags have a power source, typically a battery, for longer range operation. RFID systems (active and passive) require installing a dedicated infrastructure of portals or interrogators for tracking which may be difficult or expensive to deploy, and may lack flexibility. [0010] Other systems employ RF fingerprinting, whereby mobile devices measure signal strength from one or more beacons and attempt to correlate those measurements with signature measurements taken throughout the defined area. One example is the RADAR system. (See P. Bahl and V. N. Padmanabhan, "Radar: An In-Building RF-based User Location and Tracking System", in Proceedings of the IEEE Infocom 2000, Tel-Aviv, Israel, vol. 2, March 2000, pp. 775-784). One drawback of systems such as these is that the signature measurements are taken infrequently, and the measurement task may be cumbersome and expensive. The RF environment may change significantly throughout any given time period, and the accuracy of the location calculation will be degraded accordingly. [0011] Other systems employ triangulation, whereby fixed devices measure the signal strength or propagation delay of a mobile device and use this information in conjunction with the known location of the fixed device to compute the location of the mobile device. These systems require installing a dedicated infrastructure of fixed devices for tracking, which may be difficult or expensive to deploy, and may lack flexibility. [0012] There is therefore a need in the art for an accurate position location and tracking system suitable for a wide range of facilities in variable environments. BRIEF SUMMARY OF THE INVENTION [0013] An accurate position location and tracking system suitable for a wide range of facilities in variable environments is disclosed. In one aspect, a system for position location comprises a plurality of sensors, each sensor for generating a first plurality of measurements of a plurality of sources, a plurality of objects, each object generating a second plurality of measurements of the plurality of sources, and a processor for receiving one or more of the first pluralities of measurements and one or more of the second pluralities of measurements from the plurality of objects, and generating a position location for each one or more of the plurality of objects in accordance with the received first pluralities of measurements and the respective received second plurality of measurements. [0014] In another aspect, one or more tags may be deployed, each comprising a receiver for receiving a plurality of beacon signals, a processor for generating positioning information in response to the received plurality of beacon signals, and a transmitter for transmitting the positioning information. [0015] In another aspect, a sensor may comprise a network monitor comprising a receiver for receiving a plurality of signals from a plurality of sources, measurement circuitry for measuring one or more attributes of the plurality of received signals to produce a plurality of measurements, and a transmitter for transmitting the plurality of measurements to a remote position location estimation device, such as a position engine. [0016] In another aspect, position engine comprises a mapped space of a physical environment, a receiver for receiving first measurements of the physical environment from one or more sensors, and a processor for updating the mapped space in response to the received measurements. In another aspect, the receiver further receives second measurements from an object within the physical environment, and the processor generates an object position location estimate for the object from the received second measurements and the mapped space. [0017] Various other aspects are also presented. BRIEF DESCRIPTION OF SEVERAL VIEWS OF THE DRAWINGS [0018] FIG. 1 is an example embodiment of a system for position location and tracking. [0019] FIG. 2 depicts a prior art wireless tracking system. Continue reading about Wireless position location and tracking system... Full patent description for Wireless position location and tracking system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Wireless position location and tracking system patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Wireless position location and tracking system or other areas of interest. ### Previous Patent Application: Self-surveying wideband ground transmitters Next Patent Application: Antenna device Industry Class: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) ### FreshPatents.com Support Thank you for viewing the Wireless position location and tracking system patent info. IP-related news and info Results in 0.12693 seconds Other interesting Feshpatents.com categories: Electronics: Semiconductor , Audio , Illumination , Connectors , Crypto , 174 |
 * Protect your Inventions * US Patent Office filing 
PATENT INFO |
|
