Relative location of a wireless node in a wireless network
AssigneeCisco Technology, Inc.
InventorsBrian Donald Hart, Bretton Lee Douglas
Life of this patent
Estimating the term…
Abstract
In one embodiment, a method includes computing a probability surface corresponding to the location probability of the wireless node within a physical region based on the received signal strength data associated with a wireless node and an RF model of the physical region; computing, based on the probability surface, an aggregate probability (Pin) of the wireless node being inside a perimeter defined with the physical region; computing, based on the probability surface, an aggregate probability (Pout) of the wireless node being outside the perimeter; computing a probability ratio of the aggregate probabilities Pin to Pout; and determining whether the wireless node is inside or outside the perimeter based on a comparison of Pout and Pin.
Claims27
A computer-readable medium encoded with computer-executable instructions, the computer-executable instructions, when executed operable, to cause one or more processors to:
- compute a probability surface corresponding to the location probability of a wireless node within a physical region based on a received signal strength data associated with the wireless node and a Radio Frequency (RF) model of the physical region;
- compute, based on the probability surface, an aggregate probability (Pin) of the wireless node being inside a perimeter defined with the physical region;
- compute, based on the probability surface, an aggregate probability (Pout) of the wireless node being outside the perimeter;
- and
- determine whether the wireless node is inside or outside the perimeter based on a comparison of Pout and Pin;
- and
- output to a network access control node an indication of whether the wireless node has been determined to be inside or outside the perimeter.
A method comprising:
- computing, in a computing device, a probability surface corresponding to the location probability of a wireless node within a physical region based on the received signal strength data associated with the wireless node and a Radio Frequency (RF) model of the physical region;
- computing, based on the probability surface, an aggregate probability (Pin) of the wireless node being inside a perimeter defined with the physical region;
- computing, based on the probability surface, an aggregate probability (Pout) of the wireless node being outside the perimeter;
- and
- determining whether the wireless node is inside or outside the perimeter based on a comparison of Pout and Pin.
A system comprising:
- a location server operable to compute a probability surface corresponding to the location probability of a wireless node within a physical region based on the received signal strength data associated with the wireless node and a Radio Frequency (RF) model of the physical region;
- compute, based on the probability surface, an aggregate probability (Pin) of the wireless node being inside a perimeter defined with the physical region;
- compute, based on the probability surface, an aggregate probability (Pout) of the wireless node being outside the perimeter;
- and determine whether the wireless node is inside or outside the perimeter based on a comparison of Pout and Pin;
- and
- a wireless access point operable to communicate with a wireless node.
Dependencies are inferred from the claim text.