Directional finding system implementing a rolling code
First Claim
1. A method for finding an object comprising the steps of:
- receiving input to monitor a unit by a monitoring device, wherein said monitored unit is assigned a first code;
receiving input to establish a maximum distance said monitored unit can be located from said monitoring device;
polling said monitored unit with a second code;
receiving an acknowledgement from said monitored unit with a third code; and
determining an approximate distance said monitored unit is located from said monitoring device.
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0 Petitions
Accused Products
Abstract
A method and system for finding an object, e.g., person, automobile. A monitoring device may be configured to monitor one or more units “monitored units” which are attached to various objects, e.g., person, automobile. The monitoring device may poll each monitored unit. Based on the signal strength of the responses, the monitoring device may determine the approximate distance each monitored unit is located from the monitoring device. Both the monitoring device and each monitored unit may be configured to store an algorithm to allow for a rolling identification code to be transmitted between the two devices. By transmitting a rolling identification code between the two devices, a third party would be less likely to associate the identification code with the object, e.g., person, attached to the monitored unit.
43 Citations
45 Claims
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1. A method for finding an object comprising the steps of:
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receiving input to monitor a unit by a monitoring device, wherein said monitored unit is assigned a first code;
receiving input to establish a maximum distance said monitored unit can be located from said monitoring device;
polling said monitored unit with a second code;
receiving an acknowledgement from said monitored unit with a third code; and
determining an approximate distance said monitored unit is located from said monitoring device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system, comprising:
a monitoring device configured to monitor a position of a monitored unit attached to an object, wherein said monitoring device comprises;
circuitry operable for receiving input to monitor said monitored unit, wherein said monitored unit is assigned a first code;
circuitry operable for receiving input to establish a maximum distance said monitored unit can be located from said monitoring device;
circuitry operable for polling said monitored unit with a second code;
circuitry operable for receiving an acknowledgement from said monitored unit with a third code; and
circuitry operable for determining an approximate distance said monitored unit is located from said monitoring device. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A system, comprising:
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a monitored unit attached to an object; and
a monitoring device configured to monitor a position of said monitored unit, wherein said monitoring device comprises;
circuitry operable for receiving input to monitor said monitored unit, wherein said monitored unit is assigned a first code;
circuitry operable for receiving input to establish a maximum distance said monitored unit can be located from said monitoring device;
circuitry operable for polling said monitored unit with a second code;
circuitry operable for receiving an acknowledgement from said monitored unit with a third code; and
circuitry operable for determining an approximate distance said monitored unit is located from said monitoring device.
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43. A system, comprising:
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a monitored unit attached to an object, wherein said monitored unit comprises;
circuitry operable for detecting tampering of said monitored unit;
circuitry operable for transmitting an indication that said monitored unit has been tampered with; and
circuitry operable for transmitting signals in a substantially continuous manner; and
a monitoring device configured to monitor a position of said monitored unit, wherein said monitoring device comprises;
circuitry operable for receiving said indication that said monitored unit has been tampered with;
circuitry operable for receiving said transmitted signals; and
circuitry operable for determining a direction of said monitored unit via a signal strength and a direction of said transmitted signals.
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44. A method for finding one or more objects comprising the steps of:
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receiving input to monitor one or more units by a monitoring device, wherein each of said one or more units is assigned a unique identification code, wherein each of said one or more units is attached to an object; and
polling each of said one or more units with a rolling identification code.
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45. A system, comprising:
a monitoring device, wherein said monitoring device comprises;
a system on a chip (SoC) configured to monitor a unit attached to an object; and
an activation unit coupled to said SoC, wherein said activation unit activates said SoC for a limited duration.
Specification