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1. WO2009010470 - METHOD FOR DETECTING THE SCRAMBLING OF A RADIOCOMMUNICATION NETWORK, AND CORRESPONDING COMPUTER PROGRAM PRODUCT, STORAGE MEANS AND CIRCUIT

Publication Number WO/2009/010470
Publication Date 22.01.2009
International Application No. PCT/EP2008/059106
International Filing Date 11.07.2008
IPC
H04K 3/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
3Jamming of communication; Counter-measures
CPC
B60R 2025/1016
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
25Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
10actuating a signalling device
1013Alarm systems characterised by the type of warning signal, e.g. visual, audible
1016Remote signals alerting owner or authorities, e.g. radio signals
B60R 2325/205
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
2325Indexing scheme relating to vehicle anti-theft devices
20Communication devices for vehicle anti-theft devices
205Mobile phones
B60R 25/2072
BPERFORMING OPERATIONS; TRANSPORTING
60VEHICLES IN GENERAL
RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
25Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
20Means to switch the anti-theft system on or off
2072with means for preventing jamming or interference of a remote switch control signal
H04K 2203/16
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
2203Jamming of communication; Countermeasures
10Jamming or countermeasure used for a particular application
16for telephony
H04K 2203/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
2203Jamming of communication; Countermeasures
10Jamming or countermeasure used for a particular application
18for wireless local area networks or WLAN
H04K 2203/22
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
2203Jamming of communication; Countermeasures
10Jamming or countermeasure used for a particular application
22for communication related to vehicles
Applicants
  • SIERRA WIRELESS [FR]/[FR] (AllExceptUS)
  • GIRARD, Erwan [FR]/[FR] (UsOnly)
  • FLECHELLE, Christophe [FR]/[FR] (UsOnly)
  • LYS, Thierry [FR]/[FR] (UsOnly)
Inventors
  • GIRARD, Erwan
  • FLECHELLE, Christophe
  • LYS, Thierry
Agents
  • GUENE, Patrick
Priority Data
075647713.07.2007FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR DETECTING THE SCRAMBLING OF A RADIOCOMMUNICATION NETWORK, AND CORRESPONDING COMPUTER PROGRAM PRODUCT, STORAGE MEANS AND CIRCUIT
(FR) PROCEDE DE DETECTION DU BROUILLAGE D'UN RESEAU DE RADIOCOMMUNICATION, PRODUIT PROGRAMME D'ORDINATEUR, MOYEN DE STOCKAGE ET CIRCUIT CORRESPONDANTS
Abstract
(EN)
The proposal is for a method for detecting the scrambling of a radiocommunication network, the said method being applied by a radiocommunication circuit capable of being connected to the said network by being synchronized on a radiocommunication channel, the said method comprising: a final detection phase, comprising the following steps: * detection of the verification of the following final condition: there are N radiocommunication channels on which the radiocommunication circuit cannot be synchronized despite the detection of a power level normally sufficient for being synchronized, where N > 2; * if the said final condition is verified, generation of a final scrambling signal with a probability of scrambling equal to 100%; - at least one intermediate detection phase, comprising the following steps: * detection of the verification of at least one intermediate condition; * if the said at least one intermediate condition is verified, generation of an intermediate scrambling signal with a probability of scrambling of less than 100%.
(FR)
Il est proposé un procédé de détection du brouillage d'un réseau de radiocommunication, ledit procédé étant mis en œuvre par un circuit de radiocommunication capable de se connecter audit réseau en se synchronisant sur un canal de radiocommunication, ledit procédé comprenant : une phase de détection finale, comprenant les étapes suivantes : * détection de la vérification de la condition finale suivante : il existe N canaux de radiocommunication sur lesquels le circuit de radiocommunication ne peut pas se synchroniser malgré la détection d'un niveau de puissance normalement suffisant pour se synchroniser, avec N>2; * si ladite condition finale est vérifiée, génération d'un signal de brouillage final avec une probabilité de brouillage égale à 100%; - au moins une phase de détection intermédiaire, comprenant les étapes suivantes : * détection de la vérification d'au moins une condition intermédiaire; * si ladite au moins une condition intermédiaire est vérifiée, génération d'un signal de brouillage intermédiaire avec une probabilité de brouillage inférieure à 100%.
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