System and method for determining signal source location in wireless local area network
First Claim
1. A method, comprising:
- receiving, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader;
receiving, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock;
defining, via a processor, a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and
defining, via the processor, a second time relationship between the second clock and the system time based on the second time-of-arrival measurement.
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Accused Products
Abstract
Systems and methods for determining signal source location in wireless local area networks are disclosed. An example method includes receiving, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader; receiving, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock; defining a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and defining a second time relationship between the second clock and the system time based on the second time-of-arrival measurement.
42 Citations
20 Claims
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1. A method, comprising:
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receiving, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader; receiving, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock; defining, via a processor, a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and defining, via the processor, a second time relationship between the second clock and the system time based on the second time-of-arrival measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus, comprising:
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memory including machine-readable instructions; and a processor to execute the machine-readable instructions to perform operations comprising; receiving, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader; receiving, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock; defining a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and defining a second time relationship between the second clock and the system time based on the second time-of-arrival measurement. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A machine-readable storage device comprising instruction that, when executed, cause a machine to at least:
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receive, from a first signal reader, a first time-of-arrival measurement for a first radio frequency (RF) signal generated by a first wireless local area network (WLAN) signal source located at a first known location, the first time-of-arrival measurement being relative to a first clock of the first signal reader; receive, from a second signal reader, a second time-of-arrival measurement for the RF signal, the second time-of-arrival measurement being relative to a second clock of the second signal reader, wherein the first clock is not synchronized with the second clock; define a first time relationship between the first clock and a system time based on the first time-of-arrival measurement; and define a second time relationship between the second clock and the system time based on the second time-of-arrival measurement. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification