System and method for computing the position of a mobile device operating in a wireless network
First Claim
1. A method for determining a location of a mobile device operating in a wireless communication network comprising the steps of:
- providing at least four fixed reference devices within the wireless communication network;
computing at least three Apollonius circles between the mobile device and each of the at least three different pairs of fixed reference devices, wherein the computed Apollonius circles are indicative of the distance between the mobile device and each of the associated fixed reference devices of each pair; and
calculating the location of the mobile device as the intersection of the computed Apollonius circles.
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Accused Products
Abstract
The present invention provides a method for computing the position of a mobile device (200,405) operating in a wireless network (100). The system includes a receiver, adapted to receive respective signals from each of at least four reference devices (410,415,420,425) at the mobile device (405), each respective signal including information representing a Time of Flight between the mobile device (405) and the associated fixed reference device. The system includes a processor (215), to estimate the location of the mobile device (200,405) by computing at least three Apollonius circles (500,600,700) between the mobile device (405) and each of the at least three different pairs of fixed reference devices, wherein the computed Apollonius circles are indicative of the distance between the mobile device (405) and each of the associated fixed reference devices of each pair; and calculating the location of the mobile device (405) as the intersection of the computed Apollonius circles.
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Citations
18 Claims
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1. A method for determining a location of a mobile device operating in a wireless communication network comprising the steps of:
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providing at least four fixed reference devices within the wireless communication network;
computing at least three Apollonius circles between the mobile device and each of the at least three different pairs of fixed reference devices, wherein the computed Apollonius circles are indicative of the distance between the mobile device and each of the associated fixed reference devices of each pair; and
calculating the location of the mobile device as the intersection of the computed Apollonius circles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for determining a location of a mobile device in a wireless communications network, comprising:
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a receiver, adapted to receive respective signals from each of at least four reference devices at the mobile device, each respective signal including information representing a Time of Flight between the mobile device and the associated fixed reference device; and
a processor, adapted to estimate the location of the mobile device by;
computing at least three Apollonius circles between the mobile device and each of at least three different pairs of fixed reference devices, wherein the computed Apollonius circles are indicative of the distance between the mobile device and each of the associated fixed reference devices of each pair; and
calculating the location of the mobile device as the intersection of the computed Apollonius circles. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for determining a three dimensional location of a mobile device operating in a wireless communication network comprising the steps of:
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providing at least five fixed reference devices within the wireless communication network;
computing at least four Apollonius spheres between the mobile device and each of the at least four different pairs of fixed reference devices, wherein the computed Apollonius spheres are indicative of the distance between the mobile device and each of the associated fixed reference devices of each pair; and
calculating the three dimensional location of the mobile device as the intersection of the computed Apollonius spheres.
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Specification