Wireless positioning
AssigneeTeknologian tutkimuskeskus VTT Oy
InventorJukka Kämäräinen
Life of this patent
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Abstract
According to an example aspect of the present invention, there is provided an apparatus comprising a receiver configured to receive at least the following wireless messages: an initial message from a master base station, at least one response message from each of at least two non-master base stations and a data message from the master base station, and at least one processing core configured to determine, based on the received wireless messages, for the master base station and each non-master base station, a time difference of arrival from the apparatus, and based at least partly on the determined time difference of arrival, a location of the apparatus.
Claims24
An apparatus comprising:
- a receiver configured to receive at least the following wireless messages:
- an initial message from a master base station, at least one response message from each of at least two non-master base stations and a data message from the master base station, the initial message comprising a timestamp indicating a time of transmission of the initial message and the data message comprising a timestamp indicating a time of transmission of the data message, and
- at least one processing core configured to determine:
- based on the received wireless messages, for the master base station and each non-master base station, a time difference of arrival from the apparatus, and
- based at least partly on the determined time difference of arrival, a location of the apparatus.
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An apparatus comprising:
- a wireless transceiver configured to transmit an initial message, to receive at least one response message from at least one non-master base station and to transmit a data message, the initial message comprising a timestamp indicating a time of transmission of the initial message and the data message comprising a timestamp indicating a time of transmission of the data message, and
- at least one processing core configured to include in the initial message a timestamp indicating a point in time when the initial message is transmitted, and to include in the data message, for each received response message, a timestamp indicating a point in time when the respective response message was received in the apparatus.
A method comprising:
- receiving, in an apparatus, at least the following wireless messages:
- an initial message from a master base station, at least one response message from each of at least two non-master base stations and a data message from the master base station, the initial message comprising a timestamp indicating a time of transmission of the initial message and the data message comprising a timestamp indicating a time of transmission of the data message, and
- determining, based on the received wireless messages, for the master base station and each non-master base station, a time difference of arrival from the apparatus, and determining, based at least partly on the determined time difference of arrival, a location of the apparatus.
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A method in an apparatus comprising:
- transmitting an initial message, receiving at least one response message from at least one non-master base station and transmitting a data message, the initial message comprising a timestamp indicating a time of transmission of the initial message and the data message comprising a timestamp indicating a time of transmission of the data message, and
- including in the initial message a timestamp indicating a point in time when the initial message is transmitted, and including in the data message, for each received response message, a timestamp indicating a point in time when the respective response message was received in the apparatus.
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Dependencies are inferred from the claim text.