Positioning using observer-based time-of-arrival measurements
First Claim
1. A method to determine a position of a target mobile device, at a processor-based network control device, the method comprising:
- sending, by the network control device, a first instruction to a first network device, selected from a plurality of known-position network devices, to act as a measurement network device to send a first measurement signal;
sending, by the network control device, a second instruction to a second network device, selected from the plurality of known-position network devices, to act as an observer network device to receive the first measurement signal, the first network device associated with a first known position and the second network device associated with a second known position, wherein, following receipt of a first acknowledgement signal from the target mobile device, the first network device and the second network device change their roles so that the second network device sends a second measurement signal received by the first network device, and the first network device and the second network device receive a second acknowledgement signal sent from the target mobile device in response to receipt of the second measurement signal by the target mobile device, the first acknowledgement signal being sent in response to receipt of the first measurement signal by the target mobile device, and wherein the position of the target mobile device is determined based on timing measurements associated with the first measurement signal, the second measurement signal, the first acknowledgement signal, and the second acknowledgement signal, and based on the first known position and the second known position; and
selecting, by the network control device, at least one other network device from the plurality of known-position network devices to perform additional measurements with another of the plurality of known-position network devices in response to a determination that a desired accuracy of the determined position of the target mobile device was not achieved.
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Accused Products
Abstract
Disclosed are implementations that include a method, performed by a network control device, including sending a first instruction to a first device to send a first measurement signal, and sending a second instruction to a second device to receive the first measurement signal. Following receipt of a first acknowledgement signal from the target mobile device, the first and second devices change their roles so the second device sends, and the first device receives, a second measurement signal, and the first and second devices receive a second acknowledgement signal from the target device. Position of the target device is determined based on timing measurements associated with the first and second measurement signals, the first and second acknowledgement signals, and on known positions of the first and second devices. Another network device is selected to perform additional measurements upon a determination that a desired accuracy of the position determined was not achieved.
52 Citations
30 Claims
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1. A method to determine a position of a target mobile device, at a processor-based network control device, the method comprising:
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sending, by the network control device, a first instruction to a first network device, selected from a plurality of known-position network devices, to act as a measurement network device to send a first measurement signal; sending, by the network control device, a second instruction to a second network device, selected from the plurality of known-position network devices, to act as an observer network device to receive the first measurement signal, the first network device associated with a first known position and the second network device associated with a second known position, wherein, following receipt of a first acknowledgement signal from the target mobile device, the first network device and the second network device change their roles so that the second network device sends a second measurement signal received by the first network device, and the first network device and the second network device receive a second acknowledgement signal sent from the target mobile device in response to receipt of the second measurement signal by the target mobile device, the first acknowledgement signal being sent in response to receipt of the first measurement signal by the target mobile device, and wherein the position of the target mobile device is determined based on timing measurements associated with the first measurement signal, the second measurement signal, the first acknowledgement signal, and the second acknowledgement signal, and based on the first known position and the second known position; and selecting, by the network control device, at least one other network device from the plurality of known-position network devices to perform additional measurements with another of the plurality of known-position network devices in response to a determination that a desired accuracy of the determined position of the target mobile device was not achieved. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A network control device comprising:
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a communication module; memory; and one or more processors coupled to the memory and to the communication module; the network control device configured to; send a first instruction to a first network device, selected from a plurality of known-position network devices, to act as a measurement network device to send a first measurement signal; send a second instruction to a second network device, selected from the plurality of known-position network devices, to act as an observer network device to receive the first measurement signal, the first network device associated with a first known position and the second network device associated with a second known position, wherein, following receipt of a first acknowledgement signal from a target mobile device, the first network device and the second network device change their roles so that the second network device sends a second measurement signal received by the first network device, and the first network device and the second network device receive a second acknowledgement signal sent from the target mobile device in response to receipt of the second measurement signal by the target mobile device, the first acknowledgement signal being sent in response to receipt of the first measurement signal by the target mobile device, and wherein the position of the target mobile device is determined based on timing measurements associated with the first measurement signal, the second measurement signal, the first acknowledgement signal, and the second acknowledgement signal, and based on the first known position and the second known position; and select at least one other network device from the plurality of known-position network devices to perform additional measurements with another of the plurality of known-position network devices in response to a determination that a desired accuracy of the determined position of the target mobile device was not achieved. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A non-transitory computer readable storage media programmed with a set of instructions, executable on a processor, to:
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send, by a network control device, a first instruction to a first network device, selected from a plurality of known-position network devices, to act as a measurement network device to send a first measurement signal; send, by the network control device, a second instruction to a second network device, selected from the plurality of known-position network devices, to act as an observer network device to receive the first measurement signal, the first network device associated with a first known position and the second network device associated with a second known position, wherein, following receipt of a first acknowledgement signal from a target mobile device, the first network device and the second network device change their roles so that the second network device sends a second measurement signal received by the first network device, and the first network device and the second network device receive a second acknowledgement signal sent from the target mobile device in response to receipt of the second measurement signal by the target mobile device, the first acknowledgement signal being sent in response to receipt of the first measurement signal by the target mobile device, and wherein the position of the target mobile device is determined based on timing measurements associated with the first measurement signal, the second measurement signal, the first acknowledgement signal, and the second acknowledgement signal, and based on the first known position and the second known position; and select, by the network control device, at least one other network device from the plurality of known-position network devices to perform additional measurements with another of the plurality of known-position network devices in response to a determination that a desired accuracy of the determined position of the target mobile device was not achieved. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A method to determine a position of a target mobile device, the method comprising:
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sending, by the target mobile device, a first instruction to a first network device selected from a plurality of known-position network devices to act as a measurement network device to send a first measurement signal; and sending, by the target mobile device, a second instruction to a second network device selected from the plurality of known-position network devices to act as an observer network device to receive the first measurement signal, the first network device associated with a first known position and the second network device associated with a second known position; wherein the position of the target mobile device is determined based at least on transmission time of the first measurement signal sent by the first network device in response to the first instruction sent by the target device, a first time-of-arrival measurement of the first measurement signal at the second network device, and second time-of-arrival measurements at the first network device and the second network device of a first acknowledgement signal sent by the target mobile device in response to receiving the first measurement signal, and wherein the position of the target mobile device is determined further based on the first known position and the second known position. - View Dependent Claims (30)
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Specification