DETERMINING NODE LOCATION IN A WIRELESS NETWORK
First Claim
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1. A method for determining node location in a wireless network, comprising:
- receiving, at a receiver node, chirped signals broadcast from transmitting nodes in the wireless network, wherein the transmitting nodes are time-synchronized with each other and location of the transmitting nodes is known;
detecting beat frequencies created by pairs of chirped signals from different pairs of transmitting nodes;
determining time delay differences between chirped signals in respective beat frequency pairs; and
determining a location of the receiver node in view of the time delay differences.
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Abstract
Transmitting nodes broadcast chirped signals on a wireless network. The transmitting nodes are time-synchronized with each other and location of the transmitting nodes is known. A receiver node detects beat frequencies created by pairs of chirped signals from different pairs of transmitting nodes. Time delay differences between chirped signals in respective beat frequency pairs are determined. The receiver node'"'"'s location is determined in view of the time delay differences.
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Citations
14 Claims
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1. A method for determining node location in a wireless network, comprising:
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receiving, at a receiver node, chirped signals broadcast from transmitting nodes in the wireless network, wherein the transmitting nodes are time-synchronized with each other and location of the transmitting nodes is known; detecting beat frequencies created by pairs of chirped signals from different pairs of transmitting nodes; determining time delay differences between chirped signals in respective beat frequency pairs; and determining a location of the receiver node in view of the time delay differences. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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a receiver node to receive chirped signals from a plurality of time-synchronized base stations, the chirped signals broadcast at assigned timeslots; a measurement module to measure a beat frequency created by received chirped signals from a pair of base stations; and a processing unit to determine a location of the receiver node based at least in part on beat frequency measurements for different base stations pairs. - View Dependent Claims (9, 10, 11)
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12. A computer-readable storage medium containing instructions, that when executed, cause a computer to:
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detect beat frequencies created by chirped signals from different base stations; determine time delay differences between the chirped signals based at least in part on the beat frequencies; and determine a relative location of a receiver node with respect to the base stations via triangulation in view of the time delay differences. - View Dependent Claims (13, 14)
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Specification