Methods of Remotely Identifying, Suppressing, Disabling and Access Filtering Wireless Devices of Interest Using Signal Timing and Intercept Receivers to Effect Power Reduction, Minimization of Detection, and Minimization of Collateral Interfernce.

• US 20090311963A1
• Filed: 08/29/2006
• Published: 12/17/2009
• Est. Priority Date: 08/02/2005
• Status: Abandoned Application

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Inventors: Haverty, James D
• Application Number:
  US12/065,225
• Publication Number:
  US 20090311963A1
• Time in Patent Office: Days
• US Class Current: 455/63.100
• CPC Class Codes: H04K 2203/16 for telephony
• CPC Class Codes: H04K 3/226 Selection of non-jammed channel for communication spectrum sharing arrangements H04W16/14; selection of wireless resources by user or terminal H04W72/02
• 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 3/43 characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
• 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: H04L 2209/80 Wireless
• CPC Class Codes: H04L 63/304 intercepting circuit switched data communications lawful interception of wireless network communications H04W12/02
• CPC Class Codes: H04L 9/3271 using challenge-response
• CPC Class Codes: H04W 12/02 Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
• CPC Class Codes: H04W 12/03 Protecting confidentiality, e.g. by encryption
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Techniques for interfering with communications made according to a wireless standard between a beacon and a wireless device. The techniques determine a characteristic that is required by the standard for a signal produced during the communication. Then an interference signal is generated that is specifically adapted to the characteristic and interferes with the characteristic such that the wireless device and the beacon cannot interact as provided for the communication by the wireless standard. The techniques may be used to suppress legitimate wireless beacons in an operational area, to establish a baiting beacon in the operational area, or to interfere with communications between a wireless device and a baiting beacon or other beacon. The interference signal is specifically adapted to the characteristic in a way that greatly reduces the amount of power required for the interference signal and the conspicuousness of the interference signal.

Claims

1. A method of suppressing a given beacon so that a wireless device cannot interact with the given beacon, the given beacon and the wireless device obeying a wireless communication standard and

the method comprising the steps of:

determining a characteristic of the signal produced by the given beacon, the characteristic being required by the standard for interaction between the wireless device and the given beacon; and

generating an interference signal that is specifically adapted to the characteristic and that interferes with the characteristic at the wireless device such that the wireless device cannot interact with the given beacon.

2. The method set forth in claim 1 wherein:

in the step of generating the interference signal, the interference signal is limited to the channel upon which the given beacon is operating.

3. The method set forth in claim 2 wherein:

the interference signal is a noise signal that is limited to the channel and is stronger at the wireless device than the signal in the channel.

4. The method set forth in claim 1 wherein:

in the step of generating the interference signal, the interference signal'"'"'s power is determined by the power of the given beacon at the wireless device.

5. The method set forth in claim 1 wherein:

the interference signal defines an operational area surrounding the wireless device wherein the interference signal interferes with the characteristic such that the wireless device cannot interact with the given beacon.

6. The method set forth in claim 1 wherein:

the characteristic is a part of the signal that contains information which the wireless device requires to interact with the given beacon; and

in the step of generating the interference signal, the interference signal is generated such that the interference signal interferes with the part of the signal from the given beacon and thereby prevents the wireless device from interacting with the given beacon.

7. The method set forth in claim 6 wherein:

the given beacon generates the part of the signal at discrete times; and

in the step of generating the interference signal, the interference signal is generated at times that are determined by the times at which the part of the signal is generated by the given beacon.

8. The method set forth in claim 6 wherein:

the part of the signal is a pilot signal which the wireless device uses to synchronize itself with the given beacon; and

the interference signal interferes with the pilot signal such that the wireless device cannot use the pilot signal to synchronize itself with the given beacon.

9. The method set forth in claim 8 wherein:

the given beacon generates the information in the pilot signal which the wireless device uses to synchronize itself with the given beacon at first discrete times; and

in the step of generating the interference signal, the interference signal is generated at second discrete times such that the wireless device synchronizes itself with the interference signal instead of the pilot signal.

10. The method set forth in claim 8 wherein:

the signal produced by the given beacon includes symbols representing data carried by the signal and a quality indicator for the data;

the wireless device discards the data as indicated by the quality indicator;

the wireless device synchronizes itself with the pilot signal to read the symbols; and

in the step of generating the interference signal, the interference signal is generated at discrete times such that the wireless device erroneously reads certain of the symbols with the result that the quality indicator indicates that the data should be discarded.

11. The method set forth in claim 6 wherein:

the signal produced by the given beacon includes symbols representing data carried by the signal and a quality indicator for the data;

the wireless device discards the data as indicated by the quality indicator; and

in the step of generating the interference signal, the interference signal is generated at times such that certain of the symbols are corrupted with the result that the quality indicator indicates that the data should be discarded.

12. The method set forth in claim 6 wherein:

the characteristic is a signaling channel that carries signaling information; and

the interference signal disrupts the signaling information.

13. The method set forth in claim 1 further comprising the step of:

providing a baiting beacon with which the wireless device may interact instead of the given beacon.

14. The method set forth in claim 13 wherein the method further includes the step of:

detecting timing differences between the baiting beacon and the given beacon; and

in the step of generating the interference signal, the timing differences are used in generating the interference signal.

15. The method set forth in claim 13 wherein:

the interference signal defines an operational area surrounding the wireless device wherein the interference signal interferes with the characteristic such that the wireless device cannot interact with the given beacon;

the power of the baiting beacon is such that the wireless device will not interact with the baiting beacon outside the operational area.

16. The method set forth in claim 14 wherein:

the standard requires that a beacon authenticate itself to the wireless device and that a wireless device not interact with a beacon that does not authenticate itself; and

the baiting beacon does not authenticate itself to the wireless device, whereby the wireless device is disabled in the operational area.

17. The method set forth in claim 13 wherein:

the baiting beacon is different from the given beacon at least in that the baiting beacon specifies a different registration area from that specified by the given beacon;

the only beacon with which the wireless device can interact in the operational area is the baiting beacon, whereby the wireless device is forced to reregister with the baiting beacon.

18. The method set forth in claim 17 wherein:

the baiting beacon is further different from the given beacon in that the baiting beacon provides the wireless device with parameters which maximize the conspicuousness of the wireless device in the operational area.

19. The method set forth in claim 18 wherein:

the baiting beacon is otherwise a clone of the given beacon.

20. The method set forth in claim 13 wherein:

the baiting beacon operates on a channel which is different from the channel on which the given beacon operates.

21. The method set forth in claim 1 wherein:

there is a plurality of the given beacons;

in the step of generating the interference signal, an interference signal is generated for each of the given beacons, the interference signals defining an operational area surrounding the wireless device in which the wireless device cannot interact with any of the given beacons.

22. The method set forth in claim 21 further comprising the step of:

providing a baiting beacon in the operational area with which the wireless device may interact instead of the given beacon.

23. The method set forth in claim 22 wherein:

in the step of providing the baiting beacon, the power of the baiting beacon is such that the wireless device will not interact with the baiting beacon outside the operational area.

24. The method set forth in claim 22 wherein:

in the step of providing the baiting beacon, a baiting beacon is provided for each of the given beacons.

25. The method set forth in claim 24 wherein:

in the step of providing the baiting beacon, a baiting beacon that is provided for a given beacon differs from the given beacon in that the baiting beacon specifies a different registration area from that specified by the given beacon.

26. The method set forth in claim 25 wherein:

the baiting beacon that is provided for a given beacon further differs from the given beacon in that the baiting beacon provides the wireless device with parameters which maximize the conspicuousness of the wireless device in the operational area.

27. The method set forth in claim 26 wherein:

the baiting beacon is otherwise a clone of the given beacon.

28. The method set forth in claim 25 wherein:

a baiting beacon operates on a channel which is different from any of the channels on which the given beacons operate.

29. The method set forth in claim 13 further comprising the step of:

causing the baiting beacon to interact with the wireless device when the wireless device reregisters with the baiting beacon.

30. The method set forth in claim 29 wherein:

the baiting beacon interacts with the wireless device such that the baiting beacon obtains information from the wireless device, the wireless device responding during the interaction as specified in the standard.

31. The method set forth in claim 30 wherein:

the information is identification information for the wireless device.

32. The method set forth in claim 30 wherein.

the identification information includes temporary identification information that is temporarily assigned to the wireless device and permanent identification information that is permanently assigned to the wireless device;

and in the step of causing the baiting beacon to interact,

the baiting beacon fails to respond when the wireless device provides the temporary identification information, the failure to respond causing the wireless device to respond by providing the permanent identification information.

33. The method set forth in claim 30 further comprising the steps of:

using the identification information to query a data base; and

performing a further interaction between the baiting beacon and the wireless device based on the query result.

34. The method set forth in claim 33 wherein:

in the step of performing the further interaction, the further interaction is disabling the wireless device.

35. The method set forth in claim 29 wherein:

the baiting beacon interacts with the wireless device such that the baiting beacon disables the wireless device.

36. The method set forth in claim 35 wherein:

the baiting beacon disables the wireless device by using a disablement command specified in the wireless communication standard.

37. The method set forth in claim 35 wherein the baiting beacon disables the wireless device by performing the further step of:

herding the wireless device to a channel wherein the only beacon the wireless device can interact with is a baiting beacon that neither provides incoming calls to the wireless device nor responds to outgoing calls from the wireless device.

38. The method set forth in claim 35 wherein:

the wireless device has a cipher key and identification information that is in phase with the cipher key and

the baiting beacon disables the wireless device by performing the step of;

changing either the identification information or the cipher key in the wireless device so that the identification information is out of phase with the wireless device'"'"'s cipher key.

39. The method set forth in claim 38 wherein the baiting beacon disables the wireless device by performing the step of:

using the challenge which the baiting beacon employs in authenticating the wireless device to change the wireless device'"'"'s cipher key.

40. The method set forth in claim 35 wherein

the baiting beacon disables the wireless device by performing the step of:

changing the identification information in the wireless device.

41. The method set forth in claim 38 wherein

the baiting bacon reenables the wireless device by performing the step of:

restoring the change so that the identification information is again in phase with the cipher key.

42. The method set forth in claim 35 wherein

the wireless communication standard specifies that a wireless device will not interact with a beacon unless the beacon has authenticated itself to the wireless device;

the wireless device is able to interact with one or more given beacons; and

the baiting beacon disables the wireless device by performing the further steps for each of the given beacons of;

overriding the given beacon; and

thereupon failing to authenticate itself to the wireless device, whereby the wireless device no longer interacts with any of the given beacons.

43. The method set forth in claim 13 wherein:

the baiting beacon interacts with the wireless device by performing a network operation in place of the wireless device.

44. The method set forth in claim 43 wherein:

the network has caller identifier functionality;

the network operation is making a call from the wireless device to a destination; and

the network uses the caller identifier functionality to supply the telephone number of the wireless device to the destination.

45. The method set forth in claim 29 further comprising the step of:

providing a further baiting beacon on a different channel; and

the baiting beacon interacts with the wireless device such that the wireless device switches to the further baiting beacon'"'"'s channel.

46. The method set forth in claim 45 wherein:

the wireless device is the only wireless device operating on the further baiting beacon'"'"'s channel, whereby the wireless device is more easily located.

47. Apparatus for suppressing a given beacon so that a wireless device cannot interact with the given beacon, the given beacon and the wireless device obeying a wireless communication standard and

the apparatus comprising:

an analyzer that determines a characteristic of the signal produced by the given beacon that is required by the standard for interaction between the wireless device and the given beacon; and

a signal generator that generates a signal that is specifically adapted to the characteristic and that interferes with the characteristic at the wireless device such that the wireless device cannot interact with the given beacon.

48. A method employed in a baiting beacon of performing a given interaction with a wireless device that is monitoring the baiting beacon,

the method comprising the steps of:

during authentication of the wireless device to the baiting beacon, refusing to respond to temporary identification information that temporarily identifies the wireless device, thereby causing the wireless device to provide permanent identification information that permanently identifies the wireless device to the baiting beacon;

querying a database associated with the baiting beacon with the provided permanent identification information; and

performing the given interaction with the wireless device only if the result of the query indicates that given interaction may be performed.

49. The method set forth in claim 48 wherein:

the given interaction disables the wireless device.

50. A method employed in a baiting beacon being monitored by a wireless device of locating the wireless device

the method comprising the steps of:

requesting a report from the wireless device of the signal strength of signals from a plurality of beacons at known locations in the wireless device;

for each beacon of the plurality, using the beacon'"'"'s signal strength at the wireless device to determine the distance of the wireless device from the beacon; and

using the determined distances to determine the location of the wireless device.

51. The method set forth in claim 50 further comprising the step of:

obtaining sector orientation and aperture information for each beacon of the plurality, the sector orientation and aperture information being employed in the step of using the beacon'"'"'s signal strength to refine the determination of the distance of the wireless device from the beacon.

52. A method of employing a baiting beacon to obtain the telephone number of a wireless device which is monitoring the baiting beacon, the wireless device interacting with a network which has caller identification capability and

the method comprising the steps of:

using the baiting beacon to obtain identification information for the wireless device from the wireless device;

using the identification information in the baiting beacon to set up a call to a destination device that has access to the network'"'"'s caller identification capability; and

obtaining the telephone number of the wireless device from the destination device.

53. A method of employing a GSM baiting beacon to interact with a UMTS wireless device comprising the steps of:

establishing a relationship between the power of the GSNI baiting beacon and the power perceived by the UMTS wireless device of any UMTS beacons such that the UMTS wireless device falls back to GSM and attempts to register with the GSM baiting beacon; and

in the GSM beacon, responding to the registration attempt by interacting with the UMTS wireless device.

54. The method set forth in claim 53 wherein:

the step of establishing the relationship includes the step of interfering with the UMTS beacons, whereby the UMTS wireless device perceives the GSM baiting beacon as being more powerful than any of the UMTS beacons.

55. A method of employing a baiting beacon to obtain permanent identification information for a wireless device that is monitoring the baiting beacon,

the method comprising the steps of:

requesting identification information from the wireless device; and

when the wireless device returns temporary information, failing to respond further, the wireless device responding to the failure of the baiting beacon to respond further by returning permanent identification information.

56. A method of employing a baiting beacon to disable a wireless device that is monitoring the baiting beacon, the wireless communication standard under which the wireless device operates specifying that that a wireless device will not interact with a beacon unless the beacon has authenticated itself to the wireless device, the wireless device being potentially able to interact with one or more given beacons other than the baiting beacon, and

the method comprising the steps performed by the baiting beacon for each of the given beacons of:

overriding the given beacon; and

thereupon failing to authenticate itself to the wireless device, whereby the wireless device no longer interacts with any of the given beacons.

57. A method of moving a given wireless device that is monitoring a given beacon to a different channel,

the method comprising the steps of:

using a first baiting beacon to override the given beacon such that the given wireless device monitors the first baiting beacon instead of the given beacon in an operational area that surrounds the given wireless device;

establishing a second baiting beacon on the different channel, the second baiting beacon acting in the operational area to override any beacons operating on the different channel; and

using the first baiting beacon to command the wireless device to operate on the different channel.

58. A method of disabling a wireless device comprising the steps of:

determining an area that potentially contains the wireless device; and

irradiating the area with sufficient energy to trip the wireless device'"'"'s protection circuitry.

59. A method of employing a baiting beacon to disable a wireless device of a type wherein identification information and a cipher key must be in phase in order for the wireless device to initeract with the wireless network,

the method comprising the steps of:

enticing the wireless device to register with the baiting beacon; and

employing the baiting beacon to change either the identification information or the cipher key in the wireless device so that the identification information is out of phase with the wireless device'"'"'s cipher key.

60. The method of employing a baiting beacon set forth in claim 59 further comprising the step of:

employing the baiting beacon to reenable the wireless device by restoring the change so that the identification information is again in phase with the cipher key.