EP2301179A1 - Dispositif de brouillage et procédé de brouillage d un signal cible - Google Patents

Dispositif de brouillage et procédé de brouillage d un signal cible

Info

Publication number
EP2301179A1
EP2301179A1 EP09777155A EP09777155A EP2301179A1 EP 2301179 A1 EP2301179 A1 EP 2301179A1 EP 09777155 A EP09777155 A EP 09777155A EP 09777155 A EP09777155 A EP 09777155A EP 2301179 A1 EP2301179 A1 EP 2301179A1
Authority
EP
European Patent Office
Prior art keywords
jamming
signal
transmission power
detection
target signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09777155A
Other languages
German (de)
English (en)
Other versions
EP2301179B1 (fr
Inventor
Marko Tietz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IABG Industrieanlagen Betriebs GmbH
Original Assignee
IABG Industrieanlagen Betriebs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IABG Industrieanlagen Betriebs GmbH filed Critical IABG Industrieanlagen Betriebs GmbH
Publication of EP2301179A1 publication Critical patent/EP2301179A1/fr
Application granted granted Critical
Publication of EP2301179B1 publication Critical patent/EP2301179B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics 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"
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/30—Jamming or countermeasure characterized by the infrastructure components
    • H04K2203/34—Jamming or countermeasure characterized by the infrastructure components involving multiple cooperating jammers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/41—Jamming having variable characteristics characterized by the control of the jamming activation or deactivation time

Definitions

  • the invention relates to an interference device and a method for disturbing a target signal according to the preamble of patent claims 1 and 12, respectively.
  • Corresponding interference devices are known, for example, from US 2006/0153281 A1. They comprise a detection device for detecting a target signal, which is exchanged between a transmitting device and a receiving device, and a jamming device, which interferes with this after a detection of a target signal to be disturbed.
  • US 2007/0099559 A1 shows a jammer for use in a theater, cinema, hospital, etc.
  • the jammer transmits continuously, thus inhibiting communication by means of a cellular telephone in an area given by the local circumstances.
  • the jamming device of US 2007/0099559 A1 comprises a switch which can be activated remotely, for example, and switches off the jamming signal. After stopping the jammer, a call for help can be dropped off and possible rescue operations can be coordinated via the mobile network.
  • radio signal jammers make it difficult or impossible to properly receive radio messages.
  • the jammer like the transmitter to be disturbed, emits energy in the form of electromagnetic waves and superimposes all or part of the original waves. It can work on the same or a neighboring frequency of the disturbed receiver.
  • the field strength, the modulation of the interfering signal and the disturbed message are important. It is also possible, in the case of complicated communication protocols, to completely collapse the communication by sending out false messages via a jamming transmitter.
  • US 2007/0297489 A1 describes a smart jammer which, according to a specification, allows communication on certain channels or (in the case of frequency hopping) on a sequence of specific channels.
  • the interference signal can not be sufficiently limited in space. So it may be necessary in densely populated areas to disturb only a demarcated area. For example, the operator of a cinema has a need to suppress mobile telecommunications within a screening room. However, customers who call in the entrance hall of the cinema should not be disturbed by a corresponding jammer. A disruption of the mobile telecommunications outside the given area can not only be annoying, but also violate national laws.
  • Another example includes prisons or secured buildings.
  • Exceeding the limit of more than one meter is sometimes not sustainable. This is particularly problematic because depending on the type of communication, the boundary conditions can constantly change. For example, vehicles, scaffolding, open and closed windows can affect the range of a jammer. The weather, especially rain, affect the range of this station.
  • the transmission power of a base station is often varied. Depending on the set transmit power, a jammer can safely cover a larger or smaller area.
  • a jamming device comprising:
  • At least one detection device for detecting a target signal, which is sent to at least one communication device; at least one jammer for disturbing the target signal by an interfering signal;
  • Control device which is in communication for controlling the jamming with this; wherein the control device for controlling the at least one jamming device receives at least one input signal for determining a transmission power of the jamming device and / or at least one communication device.
  • a central idea of the present invention is thus to adapt the control of the jamming device dynamically.
  • the transmission power of the jammer and / or a communication device e.g., a base station
  • the destination signal may be a signal sent from a transmitter to a receiver.
  • the target signal may include a signal emitted by the transmitter and a corresponding response of the receiver.
  • GSM complex communication protocols
  • any communication between transmitter and receiver is disturbed.
  • the input signal for determining the transmission power of the jamming device is intended in particular to provide information on how much a jamming signal emitted by a jamming device is attenuated until it is detected.
  • changed environmental conditions eg the weather, especially rain
  • changes to a building eg open or closed windows and doors
  • obstacles eg parked vehicles, scaffolding
  • the control device may comprise at least one sensor unit, which receives the interference signal of at least one jamming device and / or a signal of the at least one communication unit for generating the input signal. It is conceivable to control the transmission power of the at least one communication unit and accordingly to generate the input signal, which gives information about this power.
  • control device comprises at least one sensor unit and measures signals of the jamming device and / or the communication units.
  • control device is independent of predetermined data and can better account for changes, be they inherent in the system or dictated by the environment.
  • the at least one sensor unit may comprise a directional antenna. That is, the sensor unit has an antenna with a strong directional characteristic, thereby defining the geographic orientation of the sensor unit.
  • a corresponding antenna can be shielded in such a way that exclusively or preferably signals are received which are emitted from a specific direction.
  • such directional antennas may be installed on a wall such that they only receive signals that are emitted within the wall. Signals generated outside the wall are not taken into account.
  • the directional antenna can thus be used to make selective measurements in certain areas.
  • a "selection" of interference or certain Known disturbance transmitter can also be done by the respective interference signal of a disturbance transmitter is transmitted on a second path, in particular conducted by the sensor unit as a synchronization signal, which then determines the coincident with the synchronization signal interference signal components.
  • the control device may be in communicative connection with the communication device for determining an activation time of the interference signal.
  • a suitable network should be provided.
  • the detection can be communicated to the control device and forwarded from there to the jamming device.
  • the control device may comprise a processing device which processes the input signal and generates a perturbation signal for adjusting the transmission power of the at least one perturbation device. That is, the transmission power of the at least one jamming device can be adapted to the measured transmission power of one or more communication devices or one or more jamming devices. In order to ensure an efficient adjustment of the transmission power, a measurement of the transmission power of the interference can be made spatially distant. Thus, the attenuation or exaggeration of the interference signal by the environment can be considered.
  • the at least one detection device can be in communicative connection with the jamming device. As already described, it is conceivable to report the detection of a target signal directly to the jamming device. In particular, detection device and jamming device can be realized in one device. However, it is advantageous if at least additionally a notification of the control device takes place.
  • the control device can be designed to emit control signals to the at least one detection device in order to set a reception power of the detection device.
  • the control device can be designed to emit control signals to the at least one detection device in order to set a reception power of the detection device.
  • the jammer may include a plurality of detection means and a memory means for storing the position of the plurality of Detection means comprise to determine a transmission position of a device which generates the target signal.
  • a transmission position of a device which generates the target signal As far as the target signal is received by a plurality of detection devices and the position of the individual detection devices is known, it is possible to determine the transmission position, for example by triangulation.
  • the jamming device may comprise a plurality of jamming devices, wherein the above-mentioned memory device is designed to store the position of the plurality of jamming devices and the control device activates at least one jamming device as a function of the determined transmission position. That is, the control device can determine the position of the transmitting device based on the plurality of detection devices and accordingly activate one or more jamming devices. Thus, jamming devices with lower transmission power can be used because selectively the jamming devices are activated which are placed close to the device transmitting the target signal.
  • the interference device may comprise monitoring devices, in particular cameras, wherein the control device is in communicative communication with the monitoring devices in order to align and / or activate them in accordance with the determined transmission position. After detecting a target signal and determining the position of the transmitting device, the controller may generate corresponding output signals to further use that information. For example, corresponding cameras can be activated to visually determine the position of the transmitter.
  • the controller may include at least one input and output device for interacting with at least one user. In particular, this may allow the user to manually activate or deactivate the interference signal. For example, communication may be allowed in an emergency. Furthermore, activation of the interfering signal can be manually confirmed by the user. Thus, erroneous activation of the interference signal can be prevented.
  • this object is achieved by a method for disturbing a target signal that is transmitted to at least one communication device, this method comprising the following steps: - Detection of the target signal with at least one detection device;
  • Adjusting the transmission power of the jammer may include regulating the transmission power according to a predetermined transmission power interval.
  • a maximum power can be specified, which must not be exceeded when transmitting the interference signal.
  • This predetermined transmission power can be position-dependent. Therefore, it is advantageous to carry out the determination of the transmission power at predetermined locations or positions. These positions may be physically remote from the jamming devices.
  • the transmission power interval may be set according to the determined transmission power of the communication device. That is, the maximum power of the jammer can be dynamically adjusted to the measured or determined transmission power of the communication device. Thus, it is possible to maintain a predetermined relation between the power of the noise signal and the power of the communication device. Thus, the set power of the jamming ensures a safe failure of the target signal, the impact on the environment is kept as low as possible.
  • the detection of the target signal can take place with at least two detection devices and be communicated to a control device, wherein the control device selects at least one jamming device from a plurality of jamming devices for disturbing the target signal.
  • the method may include a position determination of the device that transmits the target signal, wherein a position of the at least one detection device that detects the target signal is determined.
  • Determining the transmission power of the at least one jamming device and / or the at least one communication device may include measuring a transmission power by means of an antenna, in particular having a predetermined directional characteristic.
  • the method may comprise adjusting the reception power of at least one detection device as a function of the determined transmission power.
  • the transmission of the interference signal after the detection of the target signal can take place over a predetermined time interval.
  • the disturbance of the environment can therefore also be limited in time.
  • the time limit is particularly advantageous when a protocol is used in the communication between sender and receiver that requires a connection.
  • the connection can be interrupted by the interference signal.
  • the connection can be interrupted again. In this respect, although there is an exchange of protocol messages, but no content can be exchanged via the communication link.
  • the method may include a calibration wherein at least one substantially "pure" carrier signal is transmitted from at least one jammer to determine the transmission power of the jammer, which calibration may be done prior to possible detection to properly adjust the jamming transmitter power is particularly suitable for calibration because it does not interfere with allowed or allowed communication (eg, outside a safety range) even at high power, so in order to make the carrier signal easier to identify for calibration, it can do so in a suitable manner be modulated so that it does not interfere with the radio signals (eg amplitude modulation).
  • allowed or allowed communication eg, outside a safety range
  • the method may comprise processing the target signal to read a sender identification number, in particular an IMSI number (International Mobile Subscriber Identity). Furthermore, a comparison of the transmitter identification number with a plurality of identification numbers in a positive list can take place, with no interference signal being sent if the identification number of the transmitter is contained in the positive list. Thus, it may be possible to allow certain devices to communicate.
  • a sender identification number in particular an IMSI number (International Mobile Subscriber Identity).
  • IMSI number International Mobile Subscriber Identity
  • FIG. 1 shows the interference device according to the invention with a multiplicity of transmission
  • FIG. 2 is a block diagram of a transmitting-receiving unit with central computer
  • FIG. 3 is a flowchart of a monitoring and monitoring device according to the invention
  • the disturbing device according to the invention is particularly suitable for use in densely populated areas.
  • the interference device according to the invention can be used within a city.
  • Fig. 1 shows schematically a quadrangular noise region 5, which is delimited by a dashed line.
  • a wall 7 area which also has a square area.
  • This wall 7 can symbolize, for example, the outer wall of a prison.
  • Near the sturgeon area 5 is a city 2 and a first and second base station 30, 30 '.
  • these base stations 30, 30 'enable mobile radio communication according to the GSM or UTMS standard. So they allow the owner of a mobile phone services such as telephony, circuit-switched or packet-switched data transmission, text messages, etc. to use.
  • communication via standards such as HSCSD, GPRS, HSPDA, EDGE and, in the future, LTE can be offered.
  • the base stations 30, 30 may span a wireless radio network or WLAN, and enable communication in accordance with the IEEE 802.11 standard.
  • the base stations 30, 30 also symbolize mobile hand-held radio devices, which enable analog radio communication.
  • Fig. 1 is a mobile communication within the wall 7 or between a mobile phone 3, which is located within the wall 7 and the base stations 30, 30 'are prevented.
  • Mobile phones 3, which are located outside the Stör Schemes 5, should not be affected in their communication.
  • specifications may exist according to which Noise level outside the interference range 5 may not exceed a predetermined limit.
  • a specification may exist which limits the ratio of the transmission power of the base station 30, 30 'received at a position to the interference power of an interference signal received there.
  • the present invention provides a solution for this by performing a dynamic control of the interference signal.
  • four sensor units 23 to 23 are positioned at the corner points of the interference area 5.
  • Inside the interference area 5 are a plurality of transceiver units 10, 10 ', 10", which are designed to receive a target signal of the mobile telephone 3 to detect and send out a corresponding interference signal.
  • the individual transceiver units 10, 10 ', 10 "and the sensor units 23 to 23'” are networked with each other.
  • a central computer 21 in a control center 20 communicates with the sensor units 23 to 23 '"and the transceiver units 10, 10', 10" via a corresponding network.
  • the network may be a wired or wireless network.
  • the protocol used may be real-time capable or not. In the present embodiment, an Ethernet network is used.
  • a significant advantage of the networking of the devices is that a central alarm is possible in all incidents. Furthermore, the activities of the monitoring devices, transceiver units 10-10 ", sensor units 23-23" can be logged. A simple extension of the network and a step-by-step hardware installation as well as a central control of all devices are conceivable.
  • a transceiver unit 10, 10 ', 10 "includes a jammer unit 40 and a mobile telephone detection unit 50, respectively.
  • the jammer unit 40 or jammer includes a signal generator 42, an amplifier 41, and an antenna 43
  • the signal generator 42 generates an interference signal, which is amplified by the amplifier 41 and emitted by means of the antenna 43.
  • the mobile phone detection unit 50 includes a detector 52, an amplifier 51 and an antenna 53.
  • the antenna 53 is configured to receive a target signal transmitted from the mobile phone 3.
  • the amplifier 51 of the mobile radio detection unit 50 amplifies the received signal and forwards it to the detector 52.
  • the detector 52 detects that the mobile telephone 3 is transmitting, ie, that a target signal is present, it issues a corresponding detection message to the central computer 21.
  • the central computer 21 responds to this detection message, by sending an activation message to the jammer unit 40. On the basis of this message, the jammer unit 40 is activated and a corresponding interference signal is sent.
  • the central computer 21 In order to minimize the transmission power of the interfering signal, the central computer 21 periodically receives input signals from the sensor units 23 to 23 '. "The central computer 21 provides the jammer unit 40 with the received input signals at which power level it should transmit the central computer 21 adjust the sensitivity of the mobile telephone detection unit 50 by means of corresponding signals.
  • FIG. 3 illustrates the processes on the basis of two control loops.
  • the central computer 21 queries the detection message of the mobile telephone detection unit 50. If no activities have been detected by the mobile telephone detection unit, the detection message is interrogated again. In this state no interference signal is sent. Once activities have been detected by the mobile phone detection unit 50, interference is caused by the emission of a jamming signal by the jammer unit 40.
  • the second control loop interrogates the input signals from the sensor units 23 to 23 "during a disturbance event. If the received power of the interference signal at at least one sensor unit 23 to 23 '' is too high, the power of the transmitting jammer unit 40 is reduced. This is followed by a renewed interrogation of the input signals. As far as the received power is too low (the target signal is not sufficiently disturbed), the power is increased. That is, the central computer 21 sends corresponding control signals to the jammer unit 40.
  • the control signals for the jammer unit 40 may also be sent to the mobile telephone detection unit 50 to adjust the sensitivity thereof.
  • the limit value can be increased at a high transmission power of the base stations 30, 30 ', while at a low power of the base stations 30, 30' an interference signal with a lower transmission power is sufficient.
  • the present invention provides means for making a targeted interference of a mobile phone 3. For this purpose, the networking of the individual transceiver units 10, 10 ', 10 "with the central computer 21 is used. Looking at FIG.
  • a mobile telephone 3 transmitting a destination signal near a first transceiver unit 10 is shown there.
  • This transceiver unit 10 detects the target signal and sends a corresponding message to the central computer 21.
  • the central computer 21 sends an activation message to the first transceiver unit 10, which transmits a corresponding interference signal be received and adjusted so that outside the Stör Carters 5 certain defaults regarding the noise level are not exceeded.
  • the second transceiver unit 10 ' also receives the target signal of the mobile telephone 3 and transmits corresponding messages to the central computer 21. This can determine from the received messages that the mobile phone 3 is located between the first transceiver unit 10 and the second transceiver unit 10 '. Accordingly, the respective jamming units 40 of the transceivers 10, 10 'can be activated. Another transceiver unit 10 "does not receive the target signal and is not activated by the central computer 21.
  • the central computer 21 knows the position of the first transceiver unit 10 and accordingly activates the second transceiver unit 10 ', although this does not receive the target signal. Furthermore, the central computer 21 can know the position of the base station 30, 30 'and the transceiver unit 10 and activate the transceiver units 10 to 10 "which are located between the position of the mobile radiotelephone 3 and the base stations 30, 30'. Thus, an efficient disturbance of the target signal can be ensured since the spatial arrangement of the jammer units 40 is taken into account.
  • a transceiver unit 10 to 10 each includes a jammer unit 40 and a mobile telephone detection unit 50.
  • the position of the mobile telephone 3 is determined and, in a second step, the jammer units 40 are selected that can best disturb the localized mobile telephone 3.
  • the sensor units 23 to 23 "' can also be used as mobile telephone detection units 50.
  • the sensor units 23 to 23 '" are sensor units 23 to 23'" which have antennas 24 with a strong directional characteristic.
  • a transmitter e.g. by a "wrong" jammer unit 40
  • a central sensor unit 23 to 23" may be additionally provided exclusively for detecting the signals of the base stations 30, 30 'is used.
  • the central computer 21 is designed to activate the jamming units 40 for a limited time. Deactivation may occur after a predetermined time interval, e.g. ⁇ 1 min or 30 s. Furthermore, it is conceivable to detect an abort of the transmission of the target signal by means of the mobile telephone detection unit 50 and accordingly to deactivate the jammer units 40.
  • the central computer 21 with an IMSI catcher or the base stations 30, 30 '.
  • IMSI catcher or the base stations 30, 30 ' determines the IMSI number of the mobile phone 3 and to take into account in the activation of the Jammerakuen 40.
  • the mobile phones 3 having an IMSI number listed on this positive list are not disturbed by the jammer of the invention.
  • rescue or supervisory personnel can communicate with their mobile phones 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Dans différents domaines d’application, il est souhaitable de disposer d’un dispositif de brouillage pour brouiller des signaux radioélectriques, lequel est géographiquement très limité et garantit un parfait brouillage des signaux radioélectriques. La présente invention résout ce problème en réalisant un dispositif de brouillage qui comprend les éléments suivants : au moins un dispositif de détection pour détecter un signal cible qui est émis vers au moins un dispositif de communication ; au moins un dispositif de brouillage pour brouiller le signal cible avec un signal brouilleur ; un dispositif de commande qui est en liaison communicative avec le dispositif de brouillage pour commander celui-ci. Selon l’invention, le dispositif de commande destiné à commander ledit dispositif de brouillage reçoit au moins un signal d’entrée pour déterminer une puissance d’émission du dispositif de brouillage et/ou d’un dispositif de communication. Une idée centrale de la présente invention consiste ainsi à effectuer une régulation dynamique du signal brouilleur, ce qui permet de garantir un brouillage efficace de l’appareil qui émet le signal cible.
EP09777155.4A 2008-07-14 2009-07-13 Dispositif de brouillage et procédé de brouillage d' un signal cible Active EP2301179B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008033001 2008-07-14
DE102008038315A DE102008038315A1 (de) 2008-07-14 2008-08-19 Störvorrichtung und Verfahren zum Stören eines Zielsignals
PCT/EP2009/005080 WO2010006754A1 (fr) 2008-07-14 2009-07-13 Dispositif de brouillage et procédé de brouillage d’un signal cible

Publications (2)

Publication Number Publication Date
EP2301179A1 true EP2301179A1 (fr) 2011-03-30
EP2301179B1 EP2301179B1 (fr) 2019-09-11

Family

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Application Number Title Priority Date Filing Date
EP09777155.4A Active EP2301179B1 (fr) 2008-07-14 2009-07-13 Dispositif de brouillage et procédé de brouillage d' un signal cible

Country Status (8)

Country Link
US (1) US20110183602A1 (fr)
EP (1) EP2301179B1 (fr)
JP (1) JP2011528201A (fr)
AU (1) AU2009270469A1 (fr)
BR (1) BRPI0910807A2 (fr)
CA (1) CA2730422A1 (fr)
DE (1) DE102008038315A1 (fr)
WO (1) WO2010006754A1 (fr)

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Also Published As

Publication number Publication date
WO2010006754A4 (fr) 2010-03-11
JP2011528201A (ja) 2011-11-10
CA2730422A1 (fr) 2010-01-21
BRPI0910807A2 (pt) 2015-10-06
US20110183602A1 (en) 2011-07-28
WO2010006754A1 (fr) 2010-01-21
EP2301179B1 (fr) 2019-09-11
DE102008038315A1 (de) 2010-01-28
AU2009270469A1 (en) 2010-01-21

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