File creation method and system
First Claim
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1. A file creation method, comprising:
- providing a time-dependent database of reference data, the reference data comprising identities of wireless communication devices, reference locations associated with sightings of said devices, and times and dates associated with the sightings;
creating file content at a creation location, which is unknown, at a known creation time, using a portable device;
obtaining data identifying wireless communication devices detected by the portable device at the creation location at the known creation time;
associating the data and creation time with the file content; and
analysing the data identifying the wireless communication devices detected by the portable device to determine the creation location using the reference data in the time-dependent database, wherein the creation location is determined based on the reference data for the creation location and wherein reference data comprising the identities of wireless communication devices which appeared at the creation location later than the creation time are filtered out.
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Abstract
A file creation method comprising: creating file content at a particular location and time using a portable device; and obtaining data from wireless communication devices detectable by the portable device at the particular location and time thereby to obtain a set of data. The set of data identifies or enables identification of the wireless communication devices. The method further comprises associating the set of data and time with the file content to enable subsequent analysis to determine the particular location using a time-dependent database.
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Citations
17 Claims
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1. A file creation method, comprising:
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providing a time-dependent database of reference data, the reference data comprising identities of wireless communication devices, reference locations associated with sightings of said devices, and times and dates associated with the sightings; creating file content at a creation location, which is unknown, at a known creation time, using a portable device; obtaining data identifying wireless communication devices detected by the portable device at the creation location at the known creation time; associating the data and creation time with the file content; and analysing the data identifying the wireless communication devices detected by the portable device to determine the creation location using the reference data in the time-dependent database, wherein the creation location is determined based on the reference data for the creation location and wherein reference data comprising the identities of wireless communication devices which appeared at the creation location later than the creation time are filtered out. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 15)
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11. A file creation system, comprising:
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a time-dependent database of reference data, the reference data comprising identities of wireless communication devices, reference locations associated with sightings of said devices, and times and dates associated with the sightings; a portable device for creating file content at a creation location, which is unknown, at a known creation time; a wireless receiver for detecting wireless communication signals and obtaining data identifying wireless communication devices at the creation location at the known creation time; a processor for associating the data and the creation time with the file content; and a processor configured to analyse the data identifying the wireless communication devices, which was obtained by the wireless receiver, to determine the creation location using the reference data in the time-dependent database wherein the creation location is determined based on the reference data, and wherein the reference data has the identities of wireless communication devices which appeared at the creation location later than the creation time filtered out. - View Dependent Claims (12, 13, 14, 16)
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17. A method, comprising:
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creating a database of reference data about a set of wireless communication device identities, device times of sighting, and device locations thereby to obtain a historical set of data; creating file content at an unknown creation location at a known creation time using a portable device; obtaining data identifying wireless communication devices detected by the portable device at the unknown creation location at the known creation time; associating the data for the known creation time with the file content; selecting from the database historical data matching the known creation time of the file content; and determining the location of creation of the file content based on the selected historical data, wherein the identities of wireless communication devices which appeared at the creation location later than the creation time are filtered out from the selected historical data.
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Specification