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公开(公告)号：EP1228478B1
公开(公告)日：2007-05-02
申请号：EP00977629.5
申请日：2000-11-07
IPC分类号： G06K7/00
CPC分类号： G06K7/10039 , G06K7/0008
摘要： The invention concerns a data exchange method between an interrogating device and plurality of transponder devices each provided with a distinct binary code and located in the magnetic field of the interrogating device. Said method consists in modifying the duration of the signals and/or the wave form of the signals emitted by each transponder device on the basis of the relationship between the transponder device and the ambient electromagnetic noise. The invention also concerns a device implementing said method.
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2.发明公开
公开(公告)号：EP1645160A2
公开(公告)日：2006-04-12
申请号：EP04767638.2
申请日：2004-07-08
IPC分类号： H04Q9/16
CPC分类号： H04Q9/16
摘要： The invention relates to a device comprising an array of microsystems which can be individually addressed by means of electromagnetic transmission, and to a method of addressing one such device. According to the invention, the microsystems (2) communicate with a control circuit (3) by means of electromagnetic transmission (4, 5, 8), preferably by radio frequency. The addressing method initialisation phase comprises the following successive steps, whereby: the control circuit (3) addresses each microsystem (2) with an identification code which is unique thereto, and a reduced addressing code (C) which is supplied by the control circuit (3) is stored in a register of the microsystem. Moreover, a subsequent addressing phase is performed, whereby the control circuit (3) transmits reset signals and increment signals to all of the microsystems (2). Each microsystem (2) controls the resetting of at least one counter upon receipt of a reset signal and the incrementation of the contents of the counter upon receipt of an increment signal. Furthermore, each microsystem (2) compares the contents of the counter and register thereof, such as to trigger the execution of a pre-determined command when said contents are identical.
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3.发明授权
公开(公告)号：EP1665138B1
公开(公告)日：2009-07-29
申请号：EP04787363.3
申请日：2004-09-13
发明人： CROCHON, Elisabeth , TÉTU, Yann , REVERDY, Jacques
IPC分类号： G06K19/07
CPC分类号： G06K19/07767 , G06K19/0723
摘要： The invention relates to a system comprising a reading unit and devices (1) having a pre-determined ranking. Each device (1a, 1b, 1c) comprises a treatment circuit connected to a first antenna (4) that is to be coupled to an outer antenna (3, 5), and a second antenna (5) to be coupled to an antenna (4) of a higher-ranking device (1). The first antenna (4a) of the rank one device (1a) is coupled to an antenna (3) of the reading unit. The addressing of a device (1c) ranking higher than one by the reading unit is carried out by means of associated lower-ranking devices (1a, 1b). A device (1a1) with a pre-determined ranking is associated with a sub-set (8a) of higher-ranking devices (1b11, 1b12), in such a way as to form a hierarchical tree.
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公开(公告)号：EP1228478A1
公开(公告)日：2002-08-07
申请号：EP00977629.5
申请日：2000-11-07
IPC分类号： G06K7/00
CPC分类号： G06K7/10039 , G06K7/0008
摘要： The invention concerns a data exchange method between an interrogating device and plurality of transponder devices each provided with a distinct binary code and located in the magnetic field of the interrogating device. Said method consists in modifying the duration of the signals and/or the wave form of the signals emitted by each transponder device on the basis of the relationship between the transponder device and the ambient electromagnetic noise. The invention also concerns a device implementing said method.
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公开(公告)号：EP1794896B1
公开(公告)日：2008-02-27
申请号：EP05799912.0
申请日：2005-09-26
IPC分类号： H04B5/00
CPC分类号： H04B5/0056 , G06K7/10287 , H04B5/0062
摘要： The invention relates to a contactless privacy protection method which is intended to prevent or authorise a communication between a reader and an RFID label which are both located in an effective range. The invention is characterised in that it comprises: a) continuous detection for detection of a possible variation in an ambient magnetic field in one or more of the frequency bands assigned to the RFID labels; and b) upon detection of an instantaneous variation in the local magnetic field and in the absence of an inhibition, modification of a parameter value of a magnetic circuit such as to modify the instantaneous value of the local magnetic field.
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公开(公告)号：EP1794896A1
公开(公告)日：2007-06-13
申请号：EP05799912.0
申请日：2005-09-26
IPC分类号： H04B5/00
CPC分类号： H04B5/0056 , G06K7/10287 , H04B5/0062
摘要： The invention relates to a contactless privacy protection method which is intended to prevent or authorise a communication between a reader and an RFID label which are both located in an effective range. The invention is characterised in that it comprises: a) continuous detection for detection of a possible variation in an ambient magnetic field in one or more of the frequency bands assigned to the RFID labels; and b) upon detection of an instantaneous variation in the local magnetic field and in the absence of an inhibition, modification of a parameter value of a magnetic circuit such as to modify the instantaneous value of the local magnetic field.
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7.发明公开
公开(公告)号：EP1665138A1
公开(公告)日：2006-06-07
申请号：EP04787363.3
申请日：2004-09-13
发明人： CROCHON, Elisabeth , TÉTU, Yann , REVERDY, Jacques
IPC分类号： G06K19/07
CPC分类号： G06K19/07767 , G06K19/0723
摘要： The invention relates to a system comprising a reading unit and devices (1) having a pre-determined ranking. Each device (1a, 1b, 1c) comprises a treatment circuit connected to a first antenna (4) that is to be coupled to an outer antenna (3, 5), and a second antenna (5) to be coupled to an antenna (4) of a higher-ranking device (1). The first antenna (4a) of the rank one device (1a) is coupled to an antenna (3) of the reading unit. The addressing of a device (1c) ranking higher than one by the reading unit is carried out by means of associated lower-ranking devices (1a, 1b). A device (1a1) with a pre-determined ranking is associated with a sub-set (8a) of higher-ranking devices (1b11, 1b12), in such a way as to form a hierarchical tree.
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公开(公告)号：EP1008093B1
公开(公告)日：2002-11-13
申请号：EP97951335.5
申请日：1997-12-15
CPC分类号： G06K7/10039 , G06K7/0008
摘要： This identification method between an inquiring system (1) such as a gate and labels (E) placed on objects to be identified and designed for passing through the inquiring field (2) consists in sending control signals from the inquiring system (1) to the labels (E) for the latter to transmit their codes. The known inquiring mode, in which the codes are supplied bit after bit and the labels simultaneously responding are successively inhibited so that only one should be active and identified at a time, is preceded by an identification test during which all the labels transmit their code at the same time in one go, which enables an immediate identification if only one label is present. When a label has been identified, the inquiring system (1) isolates it to exchange particular data with it.
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公开(公告)号：EP1794918B1
公开(公告)日：2008-02-06
申请号：EP05802902.6
申请日：2005-09-26
IPC分类号： H04K3/00
CPC分类号： H04K3/825 , G06K7/0008 , H04K3/28 , H04K3/42 , H04K3/43 , H04K3/44 , H04K3/45 , H04K2203/20
摘要： The invention relates to a method enabling secure communication between a transmitter (10) and a receiver (1), in which a range of power levels transmitted by the transmitter (10) and a range of frequencies within which the transmission is to take place are known or can be detected by the receiver (1). The inventive method comprises the following steps, namely: transmission by the receiver (1) of a transmitter supply signal; transmission by the receiver (1) of a noise signal that dominates the transmission signal, for at least the entire duration of the transmission; and subtraction by the receiver (1) of the noise signal from the signal received, in order to obtain a useful signal. The invention also relates to a receiver device that operates according to the method.
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公开(公告)号：EP1794918A1
公开(公告)日：2007-06-13
申请号：EP05802902.6
申请日：2005-09-26
IPC分类号： H04K3/00
CPC分类号： H04K3/825 , G06K7/0008 , H04K3/28 , H04K3/42 , H04K3/43 , H04K3/44 , H04K3/45 , H04K2203/20
摘要： The invention relates to a method enabling secure communication between a transmitter (10) and a receiver (1), in which a range of power levels transmitted by the transmitter (10) and a range of frequencies within which the transmission is to take place are known or can be detected by the receiver (1). The inventive method comprises the following steps, namely: transmission by the receiver (1) of a transmitter supply signal; transmission by the receiver (1) of a noise signal that dominates the transmission signal, for at least the entire duration of the transmission; and subtraction by the receiver (1) of the noise signal from the signal received, in order to obtain a useful signal. The invention also relates to a receiver device that operates according to the method.
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