TIME OF ARRIVAL BASED POSITIONING FOR WIRELESS COMMUNICATION SYSTEMS
First Claim
1. A method comprising:
- determining a plurality of round trip transit time measurements between a wireless network device and each of a plurality of reference wireless network devices of a communication network;
determining, for each of the plurality of reference wireless network devices, a plurality of distance measurements between the wireless network device and the reference wireless network device based on a corresponding plurality of round trip transit time measurements between the wireless network device and the reference wireless network device;
calculating, for each of the plurality of reference wireless network devices, an average distance between the wireless network device and the reference wireless network device based on a corresponding plurality of distance measurements between the wireless network device and the reference wireless network device;
selecting a first subset of the plurality of reference wireless network devices for determining one or more potential locations of the wireless network device based, at least in part, on the average distance between the wireless network device and each of the plurality of reference wireless network devices and on the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device;
selecting a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices, the average distance between the wireless network device and each of the plurality of reference wireless network devices, and the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device;
determining the one or more potential locations of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices; and
determining the estimated location of the wireless network device from the one or more potential locations of the wireless network device based, at least in part, on the second subset of the plurality of reference wireless network devices.
2 Assignments
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Accused Products
Abstract
A TOA positioning system can be implemented to improve location estimation of a wireless network device. A first subset of a plurality of reference wireless network devices for determining potential locations of the wireless network device and a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device can be selected. The first and the second subsets can be selected based on a plurality of distance measurements and an average distance and associated with each of the plurality of reference wireless network devices. The potential locations of the wireless network device can be determined based on the first subset of the plurality of reference wireless network devices. The estimated location of the wireless network device can be determined from the potential locations of the wireless network device based on the second subset of the plurality of reference wireless network devices.
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Citations
25 Claims
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1. A method comprising:
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determining a plurality of round trip transit time measurements between a wireless network device and each of a plurality of reference wireless network devices of a communication network; determining, for each of the plurality of reference wireless network devices, a plurality of distance measurements between the wireless network device and the reference wireless network device based on a corresponding plurality of round trip transit time measurements between the wireless network device and the reference wireless network device; calculating, for each of the plurality of reference wireless network devices, an average distance between the wireless network device and the reference wireless network device based on a corresponding plurality of distance measurements between the wireless network device and the reference wireless network device; selecting a first subset of the plurality of reference wireless network devices for determining one or more potential locations of the wireless network device based, at least in part, on the average distance between the wireless network device and each of the plurality of reference wireless network devices and on the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; selecting a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices, the average distance between the wireless network device and each of the plurality of reference wireless network devices, and the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; determining the one or more potential locations of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices; and determining the estimated location of the wireless network device from the one or more potential locations of the wireless network device based, at least in part, on the second subset of the plurality of reference wireless network devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless network device comprising:
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a network interface; and a location calculation unit coupled with the network interface, the location calculation unit operable to; determine a plurality of round trip transit time measurements between a wireless network device and each of a plurality of reference wireless network devices; determine, for each of the plurality of reference wireless network devices, a plurality of distance measurements between the wireless network device and the reference wireless network device based on a corresponding plurality of round trip transit time measurements between the wireless network device and the reference wireless network device; calculate, for each of the plurality of reference wireless network devices, an average distance between the wireless network device and the reference wireless network device based on a corresponding plurality of distance measurements between the wireless network device and the reference wireless network device; select a first subset of the plurality of reference wireless network devices for determining one or more potential locations of the wireless network device based, at least in part, on the average distance between the wireless network device and each of the plurality of reference wireless network devices and on the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; select a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices, the average distance between the wireless network device and each of the plurality of reference wireless network devices, and the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; determine the one or more potential locations of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices; and determine the estimated location of the wireless network device from the one or more potential locations of the wireless network device based, at least in part, on the second subset of the plurality of reference wireless network devices. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. One or more machine-readable storage media having instructions stored therein, which when executed by one or more processors causes the one or more processors to perform operations that comprise:
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determining a plurality of round trip transit time measurements between a wireless network device and each of a plurality of reference wireless network devices; determining, for each of the plurality of reference wireless network devices, a plurality of distance measurements between the wireless network device and the reference wireless network device based on a corresponding plurality of round trip transit time measurements between the wireless network device and the reference wireless network device; calculating, for each of the plurality of reference wireless network devices, an average distance between the wireless network device and the reference wireless network device based on a corresponding plurality of distance measurements between the wireless network device and the reference wireless network device; selecting a first subset of the plurality of reference wireless network devices for determining one or more potential locations of the wireless network device based, at least in part, on the average distance between the wireless network device and each of the plurality of reference wireless network devices and on the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; selecting a second subset of the plurality of reference wireless network devices for determining an estimated location of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices, the average distance between the wireless network device and each of the plurality of reference wireless network devices, and the plurality of distance measurements between the wireless network device and each of the plurality of reference wireless network device; determining the one or more potential locations of the wireless network device based, at least in part, on the first subset of the plurality of reference wireless network devices; and determining the estimated location of the wireless network device from the one or more potential locations of the wireless network device based, at least in part, on the second subset of the plurality of reference wireless network devices. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification