Location data validation by static entities receiving location data items by short-range communication
First Claim
Patent Images
1. A static but movable device, comprising:
- a short-range wireless receiver;
a location-data processing arrangement for deriving successive estimates of the current location of the device using location data received on an on-going basis by the shortrange receiver;
a move detection arrangement for detecting indications that the device at least may have been moved, anda location-validity supervisor for determining, following detection of one or more indications by the move detection arrangement, whether the current location estimate is to be treated as still valid, the location-data processing arrangement being arranged, in response to the location-validity supervisor determining that the current location estimate is invalid, to discard that location estimate as current and thereafter use subsequently-received location data to derive a new current location estimate, wherein the move detection arrangement comprises both a first detector arrangement for detecting a first said indication in the form of an indication that the device has physically been subject to motion, and a second detector arrangement for detecting a second said indication constituted by a change in the set of nearby devices from which the subject device can receive transmissions via its short-range receiver;
the location-validity supervisor being responsive to the detection of a said first indication to query the second detector arrangement as to whether said second indication is present, the location-validity supervisor determining the current location estimate to be invalid when both said first and second indications are present.
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Abstract
A static but movable device has a short-range wireless transceiver by which it can receive location data items. These items are usable by a location-data processing arrangement of the device to derive an estimate of the current location of the device. If the device is moved to another location, this estimate will cease to be valid. Accordingly, the device is provided with a move detection arrangement for detecting indications that the device may have been moved, these indications being used by a location-validity supervisor to determine whether or not the current location estimate is to be treated as still valid.
49 Citations
13 Claims
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1. A static but movable device, comprising:
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a short-range wireless receiver; a location-data processing arrangement for deriving successive estimates of the current location of the device using location data received on an on-going basis by the shortrange receiver; a move detection arrangement for detecting indications that the device at least may have been moved, and a location-validity supervisor for determining, following detection of one or more indications by the move detection arrangement, whether the current location estimate is to be treated as still valid, the location-data processing arrangement being arranged, in response to the location-validity supervisor determining that the current location estimate is invalid, to discard that location estimate as current and thereafter use subsequently-received location data to derive a new current location estimate, wherein the move detection arrangement comprises both a first detector arrangement for detecting a first said indication in the form of an indication that the device has physically been subject to motion, and a second detector arrangement for detecting a second said indication constituted by a change in the set of nearby devices from which the subject device can receive transmissions via its short-range receiver;
the location-validity supervisor being responsive to the detection of a said first indication to query the second detector arrangement as to whether said second indication is present, the location-validity supervisor determining the current location estimate to be invalid when both said first and second indications are present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A static but movable device comprising:
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a short-range wireless receiver; a location-data processing arrangement for deriving an estimate of the current location of the static but movable device on the basis of location data received by the short-range receiver;
a neighbor-determination arrangement arranged to determined a set of nearby devices which the static but movable device can hear on its short-range wireless receiver on a regular basis;a move detection arrangement for detecting indications that the static but movable device at least may have been moved the move detection arrangement comprising a first detector arrangement for detecting a first said indication in the form of a change in the set of nearby devices from which the subject device can receive transmissions via its short-range receiver;
the move detection arrangement comprising a first detector arrangement for detecting a first said indication in the form of a change in the set of nearby devices from which the subject device can receive transmissions via its short-range receiver, anda location-validity supervisor for determining, following detection of one or more indications by the move detection arrangement, whether the current location estimate is to be treated as still valid, the location-validity supervisor being arranged to effect this determination by prompting the devices in said set of nearby devices to transmit and then determining whether substantially all of the devices in said set of nearby devices can still be heard by the short-range wireless receiver of the static but movable device. - View Dependent Claims (12, 13)
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Specification