Methods of suppressing GSM wireless device threats in dynamic or wide area static environments using minimal power and collateral interference
First Claim
1. Apparatus for preventing one or more wireless devices in an operational area from receiving information that a beacon broadcasts at a predetermined time, the information being capable of activating a hostile device and the apparatus comprising:
- a receiver configured to receive the beacon and signals which the wireless devices send to the beacon and to obtain environmental information from the beacon and the signals, the environmental information including at least timing information for signaling between the beacon and the wireless devices that are present in the operational area; and
a transmitter configured to respond to the obtained information by transmitting a jamming signal limited to a predetermined time and having a limited duration such that the transmitter specifically targets only the information necessary to effect a hostile action by one or more of the wireless devices that are present in the operational area.
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Accused Products
Abstract
Techniques for detecting wireless devices that are signaling in high proximity to a convoy or other operation and preventing messages from reaching the wireless devices. One class of the techniques uses surgical jamming methodologies that minimize power consumption and collateral interference, while being maximally inconspicuous; another class uses baiting beacons to prevent the messages from reaching the wireless devices. Still another class of techniques denies wireless devices access to a wireless network. An exemplary embodiment applies the techniques to wireless devices and beacons in a GSM network.
39 Citations
29 Claims
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1. Apparatus for preventing one or more wireless devices in an operational area from receiving information that a beacon broadcasts at a predetermined time, the information being capable of activating a hostile device and the apparatus comprising:
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a receiver configured to receive the beacon and signals which the wireless devices send to the beacon and to obtain environmental information from the beacon and the signals, the environmental information including at least timing information for signaling between the beacon and the wireless devices that are present in the operational area; and a transmitter configured to respond to the obtained information by transmitting a jamming signal limited to a predetermined time and having a limited duration such that the transmitter specifically targets only the information necessary to effect a hostile action by one or more of the wireless devices that are present in the operational area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of preventing one or more wireless devices in an operational area from receiving information on a forward channel, the information being capable of activating a hostile device and the method comprising the steps of:
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using a transmitter to provide a jamming signal which jams the forward channel during first periods of time during which the forward channel is capable of carrying the information but ceasing to provide the jamming signal during second periods of time during which the forward channel is not capable of carrying the information; using a receiver to listen to at least the reverse channel while the transmitter is not providing the jamming signal; and using environmental information which the receiver obtains while listening to the reverse channel and provides to the transmitter to increase the precision with which the forward channel is jammed, whereby bandwidth and power requirements for the jamming signal and collateral interference resulting therefrom are decreased. - View Dependent Claims (21, 22, 23)
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24. A method of using apparatus which includes a transmitter and a receiver and which can function as a wireless device to prevent wireless devices in an operational area from receiving information from a beacon, the information being capable of activating a hostile device and the method comprising the steps of:
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using the receiver, obtaining structural information about the structure of the beacon, the structural information including at least timing information for signaling between the beacon and the wireless devices that are present in the operational area; and using the transmitter, transmitting a jamming signal based on the obtained structural information which prevent the wireless devices from receiving the information, wherein the jamming signal is limited to a predetermined time and having a limited duration such that the transmitter specifically targets only the information necessary to effect a hostile action by one or more of the wireless devices that are present in the operational area. - View Dependent Claims (25, 26, 27, 28)
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29. A method of preventing one or more wireless devices in an operational area from receiving information on a forward channel, the information being capable of activating a hostile device and the method comprising the steps of:
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using a transmitter to provide a jamming signal which jams the forward channel during first periods of time during which the forward channel is capable of carrying the information but ceasing to provide the jamming signal during second periods of time during which the forward channel is not capable of carrying the information; using a receiver to listen to at least the reverse channel; and using environmental information which the receiver obtains while listening to the reverse channel and provides to the transmitter to increase the precision with which the forward channel is jammed, whereby bandwidth and power requirements for the jamming signal and collateral interference resulting therefrom are decreased.
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Specification