Positioning Method and Devices in a Mobile Radio Communications System
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0 Petitions
Accused Products
Abstract
The present invention relates to a method and devices for determining the position of a user equipment in a mobile radio communications system. According to the invention, the position is determined via a distortion in a radio signal transmitted to or from the user equipment, wherein the distortion is caused by a scatterer being positioned at a particular location and having time-dependent scattering properties such that the scattering of a radio signal gives rise to a distortion by which said scattering properties may be identified.
3 Citations
41 Claims
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1-20. -20. (canceled)
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21. A method of determining the position of a user equipment in a mobile radio communications system, said method comprising:
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detecting distortion in a radio signal transmitted to or from the user equipment, wherein the distortion is caused by a scatterer being positioned at a particular location and having time-dependent scattering properties associated with said location, such that the scattering of a radio signal caused by the scatterer gives rise to distortion from which said time-dependent scattering properties may be identified; and determining the position of the user equipment based on identifying in the detected distortion a logical content associated with said time-dependent scattering properties of the scatterer. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A positioning device for determining the position of a user equipment in a mobile radio communications system, the positioning device configured to:
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receive a radio signal having been transmitted to or from the user equipment; detect a distortion in the radio signal caused by the scattering of said radio signal by a scatterer being positioned at a particular location and having time-dependent scattering properties associated with said location; and identify, in said distortion, a logical content associated with said time-dependent scattering properties by which the position of the user equipment is determined. - View Dependent Claims (32, 33, 34, 35)
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36. A modulation device for determining the position of a user equipment in a mobile radio communications system, said modulation device configured to:
modulate the variation of the input current or voltage to at least one fluorescent lamp according to a pre-determined modulation pattern, to cause plasma in the fluorescent lamp to cause distortion in a radio signal transmitted to or from the user equipment, said carrying logical content according to the pre-determined modulation pattern, such that the distortion can be detected in the radio signal and used for determining the position of the user equipment. - View Dependent Claims (37, 38, 39, 40)
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41. A method of determining the position of a user equipment in a mobile radio communications system, wherein the user equipment is operating in an environment in which a number of fluorescent lamps at known locations each distort radio signals transmitted to or received from the user equipment according to a characteristic distortion pattern, and wherein said method comprises:
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receiving a radio signal transmitted to or received from the user equipment and detecting distortion in the radio signal; identifying a distortion pattern in the detected distortion; using the identified distortion pattern to identify the particular fluorescent lamp causing said detected distortion and thereby identify the location of the user equipment, based on accessing a look-up table or database that associates the characteristic distortion patterns of the fluorescent lamps with corresponding location information.
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Specification