Method and a System for Proximity Evaluation
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Accused Products
Abstract
This invention relates to a method and a system for evaluating proximity. A reference object is moved such that it enters at least two different proximity areas of two different proximity indicators, whereby proximity indications are generated. The time difference between the indications is measured. If the time difference is within predefined range it is ascertained that the reference object is within a well defined area. Thus, the fact that the speed of movement of a physical object is significantly limited is used for obtaining reliable proximity evaluations.
13 Citations
31 Claims
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1-23. -23. (canceled)
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24. An authorized domain system configured for proximity evaluation of a first device to be admitted into the authorized domain, wherein the system comprises an authorized domain manager, a reference object, a first proximity indicator comprised in the first device, and a second proximity indicator comprised in a second device, wherein the first and second proximity indicators comprise a first and a second communication unit, respectively, and wherein:
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said first proximity indicator is arranged to provide, by means of said first communication unit, a proximity indication, indicating that the reference object is within a proximity area of the first proximity indicator; and said second proximity indicator is arranged to provide, by means of said second communication unit, a proximity indication, indicating that the reference object is within a proximity area of the first proximity indicator; and
wherein said authorized domain manager is arranged to;derive a first time from said first indication, and a second time from said second indication; determine a lapsed time as the time difference between said first and second times; and compare the lapsed time with a time range and admitting the first device into the authorized domain, in dependence of whether the time difference is within the time range. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification