Method and apparatus for positioning a set of terminals in an indoor wireless environment
First Claim
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1. A method for estimating a location of a plurality of wireless terminals, comprising:
- obtaining signal strength measurements associated with a plurality of wireless terminals; and
applying a Bayesian graphical model to said signal strength measurements to estimate said location of said plurality of wireless terminals, wherein said step of applying said Bayesian graphical model further comprises a step of processing one or more prior probability distributions to generate posterior distributions and wherein said one or more prior probability distributions and said posterior distributions are associated with a relationship of said signal strength measurements and said location of said plurality of wireless terminals, wherein said Bayesian graphical model implements a non-hierarchical Bayesian model.
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Abstract
Methods and apparatus are provided for estimating a location of a plurality of wireless terminals. Signal strength measurements are obtained for at least one packet transmitted by each of the wireless terminals; and a Bayesian algorithm is applied to the signal strength measurements to estimate the location of each wireless terminal. In an infrastructure-based deployment, signal strength measurements are obtained from one or more signal monitors. In a client-based model, signal strength measurements are obtained from a client associated with a respective wireless terminal.
31 Citations
36 Claims
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1. A method for estimating a location of a plurality of wireless terminals, comprising:
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obtaining signal strength measurements associated with a plurality of wireless terminals; and applying a Bayesian graphical model to said signal strength measurements to estimate said location of said plurality of wireless terminals, wherein said step of applying said Bayesian graphical model further comprises a step of processing one or more prior probability distributions to generate posterior distributions and wherein said one or more prior probability distributions and said posterior distributions are associated with a relationship of said signal strength measurements and said location of said plurality of wireless terminals, wherein said Bayesian graphical model implements a non-hierarchical Bayesian model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for estimating a location of a plurality of wireless terminals, comprising:
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a memory; and at least one processor, coupled to the memory, operative to; obtain signal strength measurements associated with a plurality of wireless terminals; and apply a Bayesian graphical model to said signal strength measurements to estimate said location of said plurality of wireless terminals, wherein said Bayesian graphical model is applied by processing one or more prior probability distributions to generate posterior distributions and wherein said one or more prior probability distributions and said posterior distributions are associated with a relationship of said signal strength measurements and said location of said plurality of wireless terminals, wherein said Bayesian graphical model implements a non-hierarchical Bayesian model. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for estimating a location of a plurality of wireless terminals, comprising:
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obtaining signal strength measurements associated with a plurality of wireless terminals; and applying a Bayesian graphical model to said signal strength measurements to estimate said location of said plurality of wireless terminals, wherein said step of applying said Bayesian graphical model further comprises a step of processing one or more prior probability distributions to generate posterior distributions and wherein said one or more prior probability distributions and said posterior distributions are associated with a relationship of said signal strength measurements and said location of said plurality of wireless terminals, wherein said Bayesian graphical model implements a hierarchical Bayesian model. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. An apparatus for estimating a location of a plurality of wireless terminals, comprising:
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a memory; and at least one processor, coupled to the memory, operative to; obtain signal strength measurements associated with a plurality of wireless terminals; and apply a Bayesian graphical model to said signal strength measurements to estimate said location of said plurality of wireless terminals, wherein said Bayesian graphical model is applied by processing one or more prior probability distributions to generate posterior distributions and wherein said one or more prior probability distributions and said posterior distributions are associated with a relationship of said signal strength measurements and said location of said plurality of wireless terminals, wherein said Bayesian graphical model implements a hierarchical Bayesian model. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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Specification