WO2006039936A1 - Procedure et dispositif destines a brouiller des appels dans un systeme radio mobile cellulaire - Google Patents

Procedure et dispositif destines a brouiller des appels dans un systeme radio mobile cellulaire Download PDF

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Publication number
WO2006039936A1
WO2006039936A1 PCT/EP2004/011414 EP2004011414W WO2006039936A1 WO 2006039936 A1 WO2006039936 A1 WO 2006039936A1 EP 2004011414 W EP2004011414 W EP 2004011414W WO 2006039936 A1 WO2006039936 A1 WO 2006039936A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
jamming
jammed
logical
jamming 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.)
Ceased
Application number
PCT/EP2004/011414
Other languages
English (en)
Inventor
Gilles Latouche
Frédéric Rousseau
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.)
EADS Telecom SAS
EADS Secure Networks SAS
Original Assignee
EADS Telecom SAS
EADS Secure Networks SAS
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 EADS Telecom SAS, EADS Secure Networks SAS filed Critical EADS Telecom SAS
Priority to PCT/EP2004/011414 priority Critical patent/WO2006039936A1/fr
Publication of WO2006039936A1 publication Critical patent/WO2006039936A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/04—Access restriction performed under specific conditions based on user or terminal location or mobility data, e.g. moving direction, speed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/20—Countermeasures against jamming
    • H04K3/28—Countermeasures against jamming 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
    • 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
    • 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
    • H04K3/44—Jamming having variable characteristics characterized by the control of the jamming waveform or modulation type
    • 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
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/16—Jamming or countermeasure used for a particular application for telephony
    • 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
    • H04K3/60—Jamming involving special techniques
    • H04K3/65—Jamming involving special techniques 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

Definitions

  • GSM Global System for Mobile communications
  • ETSI European Telecommunications Standards Institute
  • PMR Professional Mobile Radio systems
  • APCO Project 25 systems defined by the American • TIA (Telecommunications Industry Association) for the APCO (Association of Public-Safety Communications Officers) or the TETRA (TErrestrial Trunked RAdio) system defined by the ETSI.
  • the document WO 98/18232 describes a procedure for disabling mobile terminals in a selected area, for example a bank.
  • the procedure consists in sending a broadband jamming system in the selected area, so as to prevent communication between the base station and the mobile terminals.
  • the jamming signal prevents the base station from communicating with the mobile terminals, so that it cannot allocate a particular communication channel to the mobile terminals.
  • the jamming signal has a frequency band corresponding to the frequency band received by the mobile terminals, for example the 890-960 MHz (megahertz) band.
  • Such a procedure presents the drawback of preventing all communication services, permanently and without differentiation for all the mobile terminals located in the geographic area concerned.
  • the document EP-A-I 122 897 discloses various jamming procedures . These procedures consist in detecting the transmissions from the mobile terminal. The procedure disturbs the calls to a terminal and the calls originating from that terminal by sending waves to that terminal. The transmission of the jamming can be subject to a time delay after detection of the transmissions from the mobile terminal. In an embodiment, the choice of the frequency and time characteristics of the signal to be jammed depends on previously stored system information. The stored information comprises the static parameters characteristic of each system. The jamming can therefore be limited to certain predefined logical channels, but is not therefore selective, in the sense that no condition for stopping the jamming can be generated dynamically.
  • the document FR-A-2 840 476 discloses methods of jamming radio communication with mobile terminals.
  • a request to access the network sent by a terminal is intercepted and a selective restriction criterion is evaluated on the basis of parameters relating to the intercepted access request.
  • a radio signal is sent to jam an acknowledgement signal sent by the network in response to the access request if the selective restriction criterion is satisfied.
  • Evaluating the selective restriction criterion includes determining the type of call the terminal is seeking to set up on the basis of parameters relating to the intercepted access request.
  • the call type may correspond to emergency calls, so that the selective restriction criteria can be defined in such a manner as to avoid restricting emergency calls.
  • One object of the invention is to allow jamming of calls which is selective in the sense that it is applied to all the communication services for all the mobile terminals present in a given geographic area except for specified services and/or specified mobile terminals, identifiable by an appropriate device.
  • Another advantage of the invention is that it can be implemented without cooperating with the network operator of the mobile radio system.
  • the implementation of the invention is in fact completely transparent to the latter.
  • FIG. 6 is a diagram illustrating a first method of implementing the partial jamming of a PCH channel or of an NCH channel in a GSM system.
  • FIGS. 7a to 7h are diagrams illustrating a second method of implementing the partial jamming of a PCH channel in a GSM system.
  • the CCCH channels comprise in particular: - a random access channel (RACH) , defined on the uplink beacon channel, on which a mobile terminal sends a message defining a random access request when .it needs to perform an operation on the network (to initiate a call, send a short message, update location data, etc.) .
  • RACH random access channel
  • the RACH channel is used by the mobile terminals to report their presence to the network;
  • Figure 3 diagrammatically represents an example of a mobile radio system in which the procedure and the device according to the invention are applied.
  • the device 13 comprises a receive antenna 41 and a radio receiver 42, to receive a radio signal S. It also comprises a module 43 for processing the received radio signal.
  • the radio receiver 42 performs filtering, amplification, reception and transposition operations, which are conventional in such a receiver.
  • the processing module 43 uses the received signal to perform the frequency and time synchronization, demodulation, any differential decoding, any demultiplexing, any dejamming, de-interleaving and channel decoding operations and in general all operations needed to recover the useful information conveyed by the received signal, and interpret it according to the specifications of the system.
  • the jamming signal B is sent, either towards the base station if the logical signalling channel which is jammed is defined on the uplink beacon channel, or towards the area 13 if said channel is defined on the downlink beacon channel.
  • the antenna 47 is then a directional antenna whereas the antenna 41 is usually an omnidirectional antenna.
  • the two antennas 41 and 47 can also be directional antennas, according to the radio engineering constraints in the area to be jammed 13.
  • Figure 5b shows the steps relating to the controlled transmission of the jamming signal B.
  • the command to stop transmission of the jamming signal B is generated when the identity of said predefined mobile terminal is detected or when at least one defined identity (relating to one or more authorized mobile terminals) is detected.
  • the identities relating to one or more mobile terminals concerned are for example stored in a memory of the processing means 44 of the device 13.
  • the frames represented are denoted PCH (Mi, j) where Mi designates a defined terminal which is called by the base station, and where the number j designates the occurrence of the frame of the PCH channel concerning this mobile terminal.
  • the entity on which the device 13 operates to associate the frames and reconstitute a non-jammed frame is the burst. In a variant, it can, however, operate on the symbols that each burst contains.
  • a weaker condition than the first two conditions would be that each of the symbols of the frame is transmitted without being jammed in at least one of said M frames.
  • this first embodiment can be used to make the jamming selective, by conditioning the stoppage of the jamming on the fact that the network is trying to call one or more authorized mobile terminals.
  • These authorized mobile terminals are for example those of doctors, or of any person for whom it is officially recognized that they need to be able to be called at all times and in all circumstances.
  • Said plurality of predefined service categories can include the emergency call category. Similarly, it can include the location update category. This enables, for example, the network operator to be able to locate the mobile terminals that are located in the area to be jammed 12, despite the fact that calls with these terminals are jammed.
  • said second logical signalling channel is a random access channel (RACH) defined on the uplink beacon channel which is not jammed by the jamming signal
  • said first logical signalling channel is an access grant channel defined on the downlink beacon channel (AGCH) which is at least partially jammed by the jamming signal.
  • the signal S corresponds to the uplink beacon channel
  • the signal B is sent on the frequency of the downlink beacon channel.
  • AGCH channel is " a response channel to a random access request, that is that its jamming, at least partial, prevents the mobile terminal from interpreting it as being the response to its random access request. In practice, the mobile terminal then believes, wrongly, that its random access request has not been received by the base station.
  • the device for receiving the signal S must be dimensioned as accurately as possible so as to receive only the RACHs sent in the jamming area 13.
  • the transmit power and/or the directivity of the jamming signal B should simply be chosen such that the effect of the jamming remains contained within the area to be jammed 12, which follows from the application of the radio engineering rules that are familiar to those skilled in the art.
  • the command to stop transmission of the jamming signal is generated after the expiry of a time delay roughly corresponding to the time interval between two repetitions of the random access request, and for a duration corresponding to at least the transmission duration of that request.
  • This time interval and this duration are parameters specific to the mobile radio system. For the GSM, they are indicated in the corresponding GSM standards.
  • the jamming In certain circumstances, for example linked to the requirements of the forces of law and order, it is also desirable for the jamming to be discrete, that is, for the user not to be aware of the existence of the jamming.
  • the jamming signal since the jamming signal is of the same type (same radio transmission mask and same modulation) as the signals transmitted by the system, it necessarily respects the regulatory clauses on coexistence between radio systems (such as the European standard ETS 300 113 in PMR) . In practice, it is certain that any interference generated by the harmonics of the jamming signal located outside the band ⁇ to be jammed respects these regulatory clauses, provided that -the mobile radio system respects them.
  • the jamming signal can contain an identification code used to identify the origin of the jamming.
  • This identification code can be read for example by a spectrum monitoring system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une procédure utilisée afin de brouiller des appels dans une zone géographique prédéfinie située dans une cellule d'un système radio mobile cellulaire. Un signal de brouillage (B) est envoyé au moyen d'éléments de transmission commandés, de sorte à brouiller au moins partiellement un premier canal de signalisation logique défini sur un canal de balisage. Un second canal de signalisation logique réglé sur un signal radio (S) correspondant au canal de balisage, sur lequel sont transmis les messages d'informations nécessaires à la procédure d'accès aux ressources, est balayé. Dans le cas d'une détection d'informations prédéfinies transmises dans ce second canal de signalisation logique, une commande (ES) destinée à stocker la transmission du signal de brouillage (B) est générée.
PCT/EP2004/011414 2004-10-12 2004-10-12 Procedure et dispositif destines a brouiller des appels dans un systeme radio mobile cellulaire Ceased WO2006039936A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/011414 WO2006039936A1 (fr) 2004-10-12 2004-10-12 Procedure et dispositif destines a brouiller des appels dans un systeme radio mobile cellulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2004/011414 WO2006039936A1 (fr) 2004-10-12 2004-10-12 Procedure et dispositif destines a brouiller des appels dans un systeme radio mobile cellulaire

Publications (1)

Publication Number Publication Date
WO2006039936A1 true WO2006039936A1 (fr) 2006-04-20

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009085147A1 (fr) * 2007-12-28 2009-07-09 Alcatel-Lucent Usa Inc. Procédé de commande de communications sans fil
WO2010006754A1 (fr) * 2008-07-14 2010-01-21 Industrieanlagen-Betriebsgesellschaft Mbh Dispositif de brouillage et procédé de brouillage d’un signal cible
RU2549352C1 (ru) * 2013-10-31 2015-04-27 Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации Способ подавления сети связи
WO2017116866A1 (fr) * 2015-12-31 2017-07-06 Facebook, Inc. Détection de paquets dans des réseaux de communication sans fil point à point
US10149337B2 (en) 2015-12-31 2018-12-04 Facebook, Inc. Packet detection in point-to-point wireless communication networks
US10177870B2 (en) 2015-12-31 2019-01-08 Facebook, Inc. Code assignment
US10791016B2 (en) 2015-12-31 2020-09-29 Facebook, Inc. Symbol phase adjustment for wireless communication networks
EP3716691A1 (fr) * 2019-03-26 2020-09-30 Star Solutions International Inc. Système de gestion de communication sans fil et réseau de communication électronique privé
CN113625778A (zh) * 2021-09-24 2021-11-09 北京北航天宇长鹰无人机科技有限公司 无人机遥控链路中断的处理方法、装置及无人机
WO2023022844A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Techniques pour assurer une sécurité de couche physique pendant des communications en duplex intégral
CN116232377A (zh) * 2023-01-09 2023-06-06 中国人民解放军军事科学院系统工程研究院 一种基于公共信道的扩频卫星移动通信系统扰乱方法

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Publication number Priority date Publication date Assignee Title
WO1998056130A1 (fr) * 1997-06-02 1998-12-10 Raoul Girod Appareils pour filtrer les radiotelephones
EP1122897A1 (fr) * 1999-07-27 2001-08-08 Mitsubishi Denki Kabushiki Kaisha Dispositif et systeme de prevention d'appel telephonique
US20030143943A1 (en) * 2002-01-24 2003-07-31 Kline Paul A. Selective wireless communication blocker
FR2840476A1 (fr) * 2002-05-30 2003-12-05 Nortel Networks Ltd Procede de restriction de l'usage d'un terminal radio et dispositif de restriction associe
FR2858742A1 (fr) * 2001-12-11 2005-02-11 Eads Defence & Security Ntwk Procede et dispositif de brouillage des communications dans un systeme de radiocommunications cellulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998056130A1 (fr) * 1997-06-02 1998-12-10 Raoul Girod Appareils pour filtrer les radiotelephones
EP1122897A1 (fr) * 1999-07-27 2001-08-08 Mitsubishi Denki Kabushiki Kaisha Dispositif et systeme de prevention d'appel telephonique
FR2858742A1 (fr) * 2001-12-11 2005-02-11 Eads Defence & Security Ntwk Procede et dispositif de brouillage des communications dans un systeme de radiocommunications cellulaire
US20030143943A1 (en) * 2002-01-24 2003-07-31 Kline Paul A. Selective wireless communication blocker
FR2840476A1 (fr) * 2002-05-30 2003-12-05 Nortel Networks Ltd Procede de restriction de l'usage d'un terminal radio et dispositif de restriction associe

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009085147A1 (fr) * 2007-12-28 2009-07-09 Alcatel-Lucent Usa Inc. Procédé de commande de communications sans fil
US8041307B2 (en) 2007-12-28 2011-10-18 Alcatel Lucent Method of controlling wireless communications
KR101156390B1 (ko) * 2007-12-28 2012-06-13 알카텔-루센트 유에스에이 인코포레이티드 무선 통신 제어 방법 및 시스템
WO2010006754A1 (fr) * 2008-07-14 2010-01-21 Industrieanlagen-Betriebsgesellschaft Mbh Dispositif de brouillage et procédé de brouillage d’un signal cible
RU2549352C1 (ru) * 2013-10-31 2015-04-27 Федеральное государственное казенное военное образовательное учреждение высшего профессионального образования "Военный учебно-научный центр Военно-воздушных сил "Военно-воздушная академия имени профессора Н.Е. Жуковского и Ю.А. Гагарина" (г. Воронеж) Министерства обороны Российской Федерации Способ подавления сети связи
US10193648B2 (en) 2015-12-31 2019-01-29 Facebook, Inc. Mitigating packet interference
US10149337B2 (en) 2015-12-31 2018-12-04 Facebook, Inc. Packet detection in point-to-point wireless communication networks
US10177870B2 (en) 2015-12-31 2019-01-08 Facebook, Inc. Code assignment
WO2017116866A1 (fr) * 2015-12-31 2017-07-06 Facebook, Inc. Détection de paquets dans des réseaux de communication sans fil point à point
US10757743B2 (en) 2015-12-31 2020-08-25 Facebook, Inc. Packet detection in point-to-point wireless communication networks
US10791016B2 (en) 2015-12-31 2020-09-29 Facebook, Inc. Symbol phase adjustment for wireless communication networks
EP3716691A1 (fr) * 2019-03-26 2020-09-30 Star Solutions International Inc. Système de gestion de communication sans fil et réseau de communication électronique privé
US10805870B1 (en) 2019-03-26 2020-10-13 Star Solutions International Inc. Wireless communication management system and private electronic communication network
WO2023022844A1 (fr) * 2021-08-20 2023-02-23 Qualcomm Incorporated Techniques pour assurer une sécurité de couche physique pendant des communications en duplex intégral
US11825427B2 (en) 2021-08-20 2023-11-21 Qualcomm Incorporated Techniques for performing physical layer security during full-duplex communications
CN113625778A (zh) * 2021-09-24 2021-11-09 北京北航天宇长鹰无人机科技有限公司 无人机遥控链路中断的处理方法、装置及无人机
CN116232377A (zh) * 2023-01-09 2023-06-06 中国人民解放军军事科学院系统工程研究院 一种基于公共信道的扩频卫星移动通信系统扰乱方法
CN116232377B (zh) * 2023-01-09 2023-08-08 中国人民解放军军事科学院系统工程研究院 一种基于公共信道的扩频卫星移动通信系统扰乱方法

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