Methods of suppressing GSM wireless device threats in dynamic or wide area static environments using minimal power consumption and collateral interference

• US 8,606,171 B2
• Filed: 03/19/2012
• Issued: 12/10/2013
• Est. Priority Date: 08/02/2005
• Status: Expired due to Fees

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Inventors: Haverty, James D.
• Primary Examiner(s): WEST, LEWIS G
• Application Number:
  US13/424,153
• Publication Number:
  US 20120178358A1
• Time in Patent Office: 631 Days
• Field of Search: 455/1, 455/296
• US Class Current: 455/1
• CPC Class Codes: H04K 2203/16 for telephony
• CPC Class Codes: H04K 2203/24 for communication related to weapons
• CPC Class Codes: H04K 2203/34 involving multiple cooperating jammers
• CPC Class Codes: H04K 3/28 with jamming and anti-jamming mechanisms both included in a same device or system, e.g. wherein anti-jamming includes prevention of undesired self-jamming resulting from jamming
• CPC Class Codes: H04K 3/41 characterized by the control of the jamming activation or deactivation time control of jamming activation and deactivation time only for the purpose of alternating between jamming mode and target monitoring mode H04K3/45
• CPC Class Codes: H04K 3/42 characterized by the control of the jamming frequency or wavelength
• CPC Class Codes: H04K 3/44 characterized by the control of the jamming waveform or modulation type
• CPC Class Codes: H04K 3/45 characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"
• CPC Class Codes: H04K 3/65 using deceptive jamming or spoofing, e.g. transmission of false signals for premature triggering of RCIED, for forced connection or disconnection to/from a network or for generation of dummy target signal
• CPC Class Codes: H04K 3/92 related to allowing or preventing remote control

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.

Claims

1. A method of reducing power consumption and collateral interference by preventing one or more wireless devices in an operational area from receiving environmental information on downlink channels, the environmental information being capable of activating a hostile device, the method comprising:

using a receiver to detect uplink signaling of associated one or more wireless devices operating on a set of frequency channels or equivalent carrier frequencies; and

using a transmitter to create an attack signal that limits an attack to an associated plurality of downlink channels upon which the threat is receiving; and

at least one of the following;

a) limiting a bandwidth of the attack signal to be matched to the plurality of downlink channels upon which the detected one or more wireless devices are receiving;

b) adjusting a power of the attack signal either collectively on the plurality of channels or on a per downlink channel basis to match a power detected on the downlink channels; and

c) time-multiplexing the attack between downlink channels to minimize the average power.

2. The method of claim 1, comprising performing parts a) and b).

3. The method of claim 1, comprising performing parts a) and c).

4. The method of claim 1, comprising performing parts b) and c).

5. The method of claim 1, comprising performing parts a), b), and c).