Method of estimating the position of a user device using radio beacons and radio beacons adapted to facilitate the methods of the invention
a technology of user devices and radio beacons, which is applied in the direction of reradiation, instruments, high-level techniques, etc., can solve the problems of limited use within buildings and limited positioning accuracy, and achieve the effect of facilitating the estimation of position
Inactive Publication Date: 2017-05-25
HUAWEI TECH CO LTD
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The patent describes a method for estimating the position of a user device using a radio beacon that changes its transmit power level. By causing the beacon to change its power level and measuring the signal received by the user device, the distance between the two can be calculated. The method can be used to program the user device or a positioning controller to initiate the power change. Additionally, the patent suggests that the method can be improved by receiving information about the environmental properties that may affect the signal measurements, such as temperature or humidity. The technical effect of the patent is an improved method for accurately estimating the position of a user device using a radio beacon.
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[0058]With reference to FIG. 1, a radio beacon 1 has a system on chip IC 2 (which may for example, be a CC2540 from Texas Instruments, CSR1000 or CSR 1001 from CSR, EM9301 from EM Microelectronics or nRF800 series from Nordic semiconductor which runs Bluetooth short range wireless connectivity standard version 4.0 protocol for a single mode device, including the Bluetooth 4.0 location and proximity profiles) including a processor 4, RAM memory 6, a Bluetooth short range wireless connectivity standard version 4.0 protocol communications module 8 and a radio frequency transceiver module 10. The memory stores program code executable by the processor in use and data, including an ID (e.g. MAC ID) of the radio beacon, and the position of the radio beacon (for example, as latitude, longitude and optionally altitude).
[0059]The radio frequency transceiver module 10 is in electrical communication with an antenna 12 and the processor is in electrical communication with a sensor chip 14, which...
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Disclosed is the estimation of the position of a user device using radio beacons which are operable at a plurality of transmit power levels. The radio beacons may transmit their position and current transmit power level. Estimates of distance between a user device and a radio beacon can take into account both received signal strength and the current transmit power level of the radio beacon. The position of the user device can be estimated taking into account whether a radio beacon can be detected at a given transmit power level. The transmit power level of the radio beacon may vary according to a cycle. The transmit power level of the radio beacon may be changed to facilitate positioning, for example in response to a signal from a user device. A radio beacon changes transmit power level in a cycle. The radio beacon can reduce transmit power level responsive to a signal. The radio beacon may be compatible with Bluetooth short range wireless connectivity standard core specification version 4.0.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a Continuation Application of application Ser. No. 14 / 351,611, filed 14 Apr. 2014, which is the U.S. national phase of International Application No. PCT / GB2012 / 052555 filed 15 Oct. 2012, which designated the U.S. and claims priority to GB Patent Application No. 1117723.5 filed 13 Oct. 2011, and claims the benefit of U.S. Provisional Application No. 61 / 649,977 filed 22 May 2012, the entire contents of each of which are hereby incorporated by reference.FIELD OF THE INVENTION[0002]The invention concerns a method of estimating the position of a user device using radio beacons which have a plurality of discrete transmit power levels, and radio beacons adapted to facilitate estimates of the position of a user device.BACKGROUND TO THE INVENTION[0003]In recent years there has been considerable interest in determining the position of user devices, such as cellular telephones, portable electronic computers and other portable per...
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IPC IPC(8): G01S5/02G01S1/68G01S5/14
CPCG01S5/0231G01S1/68G01S5/14H04W48/16H04W64/00H04W84/12H04W84/18G01S5/0236G01S11/06Y02D30/70H04W84/00
Inventor BASHA, SYED USMANALSEHLY, FIRASARSLAN, TUGHRUL SATI
Owner HUAWEI TECH CO LTD