Time of flight (ToF) measurement
First Claim
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1. An apparatus comprising circuitry configured to cause a responding station to:
- receive an initial time of flight (ToF) measurement request from an initiating station, the initial ToF measurement request comprising a measurement request bit indicating a request to perform a ToF measurement;
transmit a first acknowledgment (ACK) to the initiating station;
transmit a first responder ToF frame after the first ACK, the first responder ToF frame comprising a status field to indicate if the request to perform the ToF measurement is accepted or not accepted, the first responder ToF frame comprising an indication of a time period during which a subsequent ToF measurement request is to be transmitted;
receive a second ACK from the initiating station;
receive the subsequent ToF measurement request from the initiating station, the subsequent ToF measurement request comprising an indication of a request for ToF measurements;
transmit a third ACK to the initiating station; and
transmit to the initiating station another responder ToF frame comprising ToF measurements in a time of arrival (ToA) field and time of departure (ToD) field.
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Accused Products
Abstract
Embodiments of a communication station and method for time-of-flight (ToF) location determination in a wireless network are generally described herein. In some embodiments, a responding communication station receives a ToF measurement request. The responding communication station transmits an acknowledgment of the ToF measurement request. The responding communication station also transmits a response to the ToF measurement request that includes an indication of a time period for an initiating communication station to poll the responding communication station for a ToF result.
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Citations
23 Claims
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1. An apparatus comprising circuitry configured to cause a responding station to:
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receive an initial time of flight (ToF) measurement request from an initiating station, the initial ToF measurement request comprising a measurement request bit indicating a request to perform a ToF measurement; transmit a first acknowledgment (ACK) to the initiating station; transmit a first responder ToF frame after the first ACK, the first responder ToF frame comprising a status field to indicate if the request to perform the ToF measurement is accepted or not accepted, the first responder ToF frame comprising an indication of a time period during which a subsequent ToF measurement request is to be transmitted; receive a second ACK from the initiating station; receive the subsequent ToF measurement request from the initiating station, the subsequent ToF measurement request comprising an indication of a request for ToF measurements; transmit a third ACK to the initiating station; and transmit to the initiating station another responder ToF frame comprising ToF measurements in a time of arrival (ToA) field and time of departure (ToD) field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A product comprising a tangible computer-readable non-transitory storage medium comprising computer-executable instructions operable to, when executed by at least one processor, cause a responding station to:
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receive an initial time of flight (ToF) measurement request from an initiating station, the initial ToF measurement request comprising a measurement request bit indicating a request to perform a ToF measurement; transmit a first acknowledgment (ACK) to the initiating station; transmit a first responder ToF frame after the first ACK, the first responder ToF frame comprising a status field to indicate if the request to perform the ToF measurement is accepted or not accepted, the first responder ToF frame comprising an indication of a time period during which a subsequent ToF measurement request is to be transmitted; receive a second ACK from the initiating station; receive the subsequent ToF measurement request from the initiating station, the subsequent ToF measurement request comprising an indication of a request for ToF measurements; transmit a third ACK to the initiating station; and transmit to the initiating station another responder ToF frame comprising ToF measurements in a time of arrival (ToA) field and time of departure (ToD) field. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus comprising circuitry configured to cause an initiating station to:
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transmit an initial time of flight (ToF) measurement request to a responding station, the initial ToF measurement request comprising a measurement request bit indicating a request to perform a ToF measurement; receive a first acknowledgment (ACK) from the responding station; receive a first responder ToF frame after the first ACK, the first responder ToF frame comprising a status field to indicate if the request to perform the ToF measurement is accepted or not accepted, the first responder ToF frame comprising an indication of a time period during which a subsequent ToF measurement request is to be transmitted; transmit a second ACK to the responding station; transmit the subsequent ToF measurement request to the responding station, the subsequent ToF measurement request comprising an indication of a request for ToF measurements; receive a third ACK from the responding station; and receive from the responding station another responder ToF frame comprising ToF measurements in a time of arrival (ToA) field and time of departure (ToD) field. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A product comprising a tangible computer-readable non-transitory storage medium comprising computer-executable instructions operable to, when executed by at least one processor, cause an initiating station to:
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transmit an initial time of flight (ToF) measurement request to a responding station, the initial ToF measurement request comprising a measurement request bit indicating a request to perform a ToF measurement; receive a first acknowledgment (ACK) from the responding station; receive a first responder ToF frame after the first ACK, the first responder ToF frame comprising a status field to indicate if the request to perform the ToF measurement is accepted or not accepted, the first responder ToF frame comprising an indication of a time period during which a subsequent ToF measurement request is to be transmitted; transmit a second ACK to the responding station; transmit the subsequent ToF measurement request to the responding station, the subsequent ToF measurement request comprising an indication of a request for ToF measurements; receive a third ACK from the responding station; and receive from the responding station another responder ToF frame comprising ToF measurements in a time of arrival (ToA) field and time of departure (ToD) field. - View Dependent Claims (21, 22, 23)
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Specification