Compensation of propagation delays of wireless signals
First Claim
1. A method, comprising:
- determining, by a system comprising a processor, first location estimate data indicative of a first set of location estimates associated with a location and second location estimate data indicative of a second set of location estimates associated with the location, wherein the first set of location estimates and the second set of location estimates are determined based on different location assessment techniques;
mapping, by the system, first sector identification data determined from the first location estimate data with second sector identification data determined from the second location estimate data; and
based on the mapping, calibrating, by the system, sector bearing data that represents a position of a user equipment within a defined sector of an access point device, with respect to a centerline determined between a receiver antenna and an emitter antenna of the access point device.
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Abstract
Propagation delay offsets of wireless signals are compensated. Compensation is accomplished through determination of an effective wireless signal propagation delay that accounts for signal path delay and propagation delay over the air. Such determination is based at least in part on statistical analysis of accurate location estimates of reference positions throughout a coverage sector or cell, and location estimates of the reference positions generated through time-of-flight (TOF) measurements of wireless signals. Determination of propagation or signal path delay offset also is attained iteratively based at least in part on reference location estimates and TOF location estimates. High-accuracy location estimates such as those obtained through global navigation satellite systems are employed as reference location estimates. Position of probes or wireless beacons, deployed throughout a sector or cell, also are employed as reference locations. Compensation of propagation delay offset improves accuracy of conventional TOF location estimates and radio network performance.
239 Citations
20 Claims
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1. A method, comprising:
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determining, by a system comprising a processor, first location estimate data indicative of a first set of location estimates associated with a location and second location estimate data indicative of a second set of location estimates associated with the location, wherein the first set of location estimates and the second set of location estimates are determined based on different location assessment techniques; mapping, by the system, first sector identification data determined from the first location estimate data with second sector identification data determined from the second location estimate data; and based on the mapping, calibrating, by the system, sector bearing data that represents a position of a user equipment within a defined sector of an access point device, with respect to a centerline determined between a receiver antenna and an emitter antenna of the access point device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system, comprising:
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a memory to store executable instructions; and a processor coupled to the memory that facilitates execution of the executable instructions to perform operations, comprising; determining first location estimate data and second location estimate data, wherein the first location estimate data is generated based on a first estimation of a location of a device and the second location estimate data is generated based on a second estimation of the location of the device, determining first sector identification data based on the first location estimate data and second sector identification data based on the second location estimate data; and based on mapping the first sector identification data with the second sector identification data, adjusting a sector bearing that represents the location within a defined sector of an access point device, with respect to a centerline between a receiver antenna and an emitter antenna of the access point device. - View Dependent Claims (12, 13, 14, 15)
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16. A computer-readable storage device comprising executable instructions that, in response to execution, cause a system comprising a processor to perform operations, comprising:
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correlating a first set of location estimates and a second set of location estimates that are associated with a common location, wherein the first set of location estimates and the second set of location estimates are determined based on different location assessments; mapping first sector identification data determined from the first location estimate data with second sector identification data determined from the second location estimate data; and based on the mapping, determining sector bearing data that represents a position of a user equipment within a defined sector of an access point device, with respect to a determined centerline between a receiver antenna and an emitter antenna of the access point device. - View Dependent Claims (17, 18, 19, 20)
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Specification