Method and system for determining whether a portable key device is located in an active area in relation to a barrier
First Claim
1. A method for determining whether a portable key device is located in an active area in relation to a barrier, wherein the active area is on the outside of the barrier, the method being performed in an access control device and comprising the steps of:
- detecting a first angle of arrival of a wireless signal from the portable key device using a first pair of separated antennas;
detecting a second angle of arrival of the wireless signal from the portable key device using a second pair of separated antennas, wherein the first pair of antennas is located on the outside of the barrier and the second pair of antennas is located on the inside of the barrier;
determining a first pair of directions based on the first angle of arrival;
determining a second pair of directions based on the second angle of arrival;
determining a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions, wherein any intersection located between a first line between the first pair of antennas and a second line between the second pair of antennas is discarded for determining the position; and
determining whether the portable key device is located in the active area based on the position.
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Accused Products
Abstract
It is presented a method for determining whether a portable key device is located in an active area in relation to a barrier. The method is performed in an access control device and comprising the steps of: detecting a first angle of arrival of a wireless signal from the portable key device using a first pair of separated antennas; detecting a second angle of arrival of a wireless signal from the portable key device using a second pair of separated antennas; determining a first pair of directions based on the first angle of arrival; determining a second pair of directions based on the second angle of arrival; determining a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions; and determining whether the portable key device is located in the active area based on the position.
25 Citations
13 Claims
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1. A method for determining whether a portable key device is located in an active area in relation to a barrier, wherein the active area is on the outside of the barrier, the method being performed in an access control device and comprising the steps of:
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detecting a first angle of arrival of a wireless signal from the portable key device using a first pair of separated antennas; detecting a second angle of arrival of the wireless signal from the portable key device using a second pair of separated antennas, wherein the first pair of antennas is located on the outside of the barrier and the second pair of antennas is located on the inside of the barrier; determining a first pair of directions based on the first angle of arrival; determining a second pair of directions based on the second angle of arrival; determining a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions, wherein any intersection located between a first line between the first pair of antennas and a second line between the second pair of antennas is discarded for determining the position; and determining whether the portable key device is located in the active area based on the position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An access control device arranged to determine whether a portable key device is located in an active area in relation to a barrier, wherein the active area is on the outside of the barrier, the access control device comprising:
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a processor; and a memory storing instructions that, when executed by the processor, cause the access control device to; detect a first angle of arrival of the wireless signal from the portable key device using a first pair of separated antennas; detect a second angle of arrival of the wireless signal from the portable key device using a second pair of separated antennas, wherein the first pair of antennas is located on the outside of the barrier and the second pair of antennas is located on inside of the barrier; determine a first pair of directions based on the first angle of arrival; determine a second pair of directions based on the second angle of arrival; determine a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions, wherein any intersection located between a first line between the first pair of antennas and a second line between the second pair of antennas is discarded for determining the position; and determining whether the portable key device is located in the active area based on the position. - View Dependent Claims (9, 10, 11)
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12. A non-transitory computer program for determining whether a portable key device is located in an active area in relation to a barrier, wherein the active area is on outside of the barrier, the computer program comprising computer program code which, when run on an access control device, causes the access control device to:
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detect a first angle of arrival of the wireless signal from the portable key device using a first pair of separated antennas; detect a second angle of arrival of the wireless signal from the portable key device using a second pair of separated antennas, wherein the first pair of antennas is located on the outside of the barrier and the second pair of antennas is located on inside of the barrier; determine a first pair of directions based on the first angle of arrival; determine a second pair of directions based on the second angle of arrival; and determine a position of the portable key device to be where one of the first pair of directions intersects one of the second pair of directions, wherein any intersection located between a first line between the first pair of antennas and a second line between the second pair of antennas is discarded for determining the position; and determine whether the portable key device is located in the active area based on the position. - View Dependent Claims (13)
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Specification