Abstract: A communication station (1) is suitable for contactless communication with transponders and with other communication stations and comprises a first signal-processing circuit (28) and a second signal-processing circuit (29), the first signal-processing circuit (28) being designed for processing signals using at least one transmission parameter in a communication between the communication station (1) and at least one transponder, and the second signal-processing circuit (29) being designed for processing other signals using at least one other transmission parameter in a communication between the communication station (1) and at least one other communication station, and the transmission parameters used in the two signal-processing circuits (28, 29) differing from each other.

Abstract: During a communication operation in a transponder system, consisting of a write/read station (1) and at least one transponder (2), a selection data block (SDB) is transmitted from the station (1) to at least one transponder (2) and, in response to the received selection data block (SDB), at least one transponder (2) transmits an identification data block (IDB) to the station (1), after which the station (1) transmits, in response to the identification data block (IDB), an acknowledge data block (QDB) to a transponder (2), the bit configuration of the acknowledge data block (QDB) being formed while using only a part (PM1) of the identification data block (IDB) associated with a transponder (2).

Abstract: The disclosure describes a communication device and a transponder adapted to provide contactless communication with the communication device include time-value determiner with the aid of which at least one time value can be determined, which time value is representative of at least a part of the communication time interval which starts at a starting instant and ends at an ending instant, in which communication time interval communication between the communication device and the transponder is possible.

Abstract: A data carrier (1) for contactless communication with the communication station comprises firstly a receiving stage (3) for receiving a request signal (IS), secondly a storage facility (16) for storing at least two items of status information (EASB1, EASB2), thirdly a readout facility (15) for reading out one item of status information (EASB1, EASB2) at a time in response to receiving the request signal (IS), fourthly a processing circuit (18) for processing the status information (EASB1, EASB2) read out in each case so as to create a transmission signal (MCRS) suitable for transmission to the communication station, fifthly a recognition facility (22) for recognizing the status information (EASB1, EASB2) read out in each case, and sixthly a control connection (25) between the recognition facility (22) and the processing circuit (18), such that the processing circuit (18) can be influenced via the control connection (25) into altering a transmission parameter for a transmission signal generated by the processi

Abstract: A data carrier (1) for contactless communication with a communication station has a substrate means (2) and a communication resonant circuit (3) connected to the substrate means (2) and consisting of a communication coil (4) and of a capacitor configuration (6) and having a resonant frequency (fR) which should have a nominal value, changing means (9) for changing the resonant frequency (fR) being provided, which changing means enable the resonant frequency (fR) to be changed from an initial value both to higher frequency values and to lower frequency values.

Abstract: A data carrier (1) for contactless communication with a communication station has a substrate (2) and a communication resonant circuit (3) connected to the substrate (2) and consisting of a communication coil (4) and of a capacitor configuration (6) and having a resonant frequency (fR) which should have a nominal value, changing unit (9) for changing the resonant frequency (fR) being provided, which changing unit enable the resonant frequency (fR) to be changed from an initial value both to higher frequency values and to lower frequency values.

Abstract: During a communication operation in a transponder system, consisting of a write/read station (1) and at least one transponder (2), a selection data block (SDB) is transmitted from the station (1) to at least one transponder (2) and, in response to the received selection data block (SDB), at least one transponder (2) transmits an identification data block (IDB) to the station (1), after which the station (1) transmits, in response to the identification data block (IDB), an acknowledge data block (QDB) to a transponder (2), the bit configuration of the acknowledge data block (QDB) being formed while using only a part (PM1) of the identification data block (IDB) associated with a transponder (2).

Abstract: Data transmission from a data carrier (D) to a station (1) normally takes place by load modulation of a non-modulated carrier signal (CS) by means of an auxiliary carrier signal (SCS1), test means provided in the station then test the correct data transmission and, upon detection of disturbed data transmission, a change over is made to an other transmission mode in which data transmission takes place from the data carrier (D) to the station (1) by means of load modulation of the non-modulated carrier signal (CS) by means of at least one other auxiliary carrier signal (SCS2).

Abstract: A data carrier (1) for contactless communication with the communication station comprises firstly a receiving stage (3) for receiving a request signal (IS), secondly a storage facility (16) for storing at least two items of status information (EASB1, EASB2), thirdly a readout facility (15) for reading out one item of status information (EASB1, EASB2) at a time in response to receiving the request signal (IS), fourthly a processing circuit (18) for processing the status information (EASB1, EASB2) read out in each case so as to create a transmission signal (MCRS) suitable for transmission to the communication station, fifthly a recognition facility (22) for recognizing the status information (EASB1, EASB2) read out in each case, and sixthly a control connection (25) between the recognition facility (22) and the processing circuit (18), such that the processing circuit (18) can be influenced via the control connection (25) into altering a transmission parameter for a transmission signal generated by the processi

Abstract: A write/read device (1) for the contactless communication with at least one transponder has first coding means (4) for coding a data block (DB) in accordance with a first coding method, which first coding means (4) can generate at the most a given number of N coding signals (KI) per data block (DB) in accordance with this first coding method, and has second coding means (9) for coding a data block (DB) in accordance with a second coding method, which second coding means (9) can generate at the most a given number of M coding signals (KI) per data block (DB) in accordance with this second coding method, and has selection means (10) for the selection between the coding signals (KI) supplied by the first coding means (4) and the coding signals (KI) supplied by the second coding means (9).

Abstract: A communication station (1) and a transponder (2) are designed in such a way that an inventorizing operation can be performed using various memory areas (36, 37, 38, 39, 40), which are provided in an addressable memory (35) of the transponder (2), and in which different identification data (UIDDATA, USERDATA) is stored.

Abstract: During a communication operation in a transponder system, consisting of a write/read station (1) and at least one transponder (2), a selection data block (SDB) is transmitted from the station (1) to at least one transponder (2) and, in response to the received selection data block (SDB), at least one transponder (2) transmits an identification data block (IDB) to the station (1). In response to the identification data block (IDB), the station (1) transmits an acknowledge data block (QDB) to the transponder (2) identified in the identification data block (IDB), the bit configuration of the acknowledge data block (QDB) being formed while using only a part (PM1) of the identification data block (IDB) associated with the transponder (2).

Abstract: A data carrier (1) for contactless communication with the communication station comprises firstly a reception stage (3) for receiving an interrogation signal (IS), secondly a generation stage (17) for generating a response signal (RS) upon reception of the interrogation signal (IS), thirdly a processing circuit (18) for processing the response signal (RS) into a transmission signal (MCRS) suitable for transmission to the communication station, fourthly a determination device (22) for determinating at least one representative value (REP1, REP2), the representative value (REP1, REP2) representing the field strength of the field acting on the data carrier (1), and fifthly a control connection (25) between the determination device (22) and the processing circuit (18), wherein the processing circuit (18) can be influenced via the control connection (25) in order to vary a transmission parameter of a transmission signal generated by the processing circuit (18) as a function of the at least one representative value

Abstract: A data carrier (1) for contactless communication with the communication station comprising firstly a reception stage (3) for receiving an interrogation signal (IS), secondly a generation stage (17) for generating a response signal (RS) upon reception of the inquiry signal (IS), thirdly a processing circuit (18) for processing the response signal (RS) into a transmission signal (MCRS) suitable for transmission to the communication station,fourthly a determinating device (22) for determi (REP1, REP2), said representative value (REP1, REP2) representing the field strength of the field acting on the data carrier (1), and fifthly a control connection (25) between the determinating device (22) and the generating stage (17), which generating stage (17) can be influenced via the control connection (25) in order to vary, as a function of the at least one representative value (REP1, REP2), the repetition frequency with which the transmission signal (MCRS) is transmitted.

Abstract: A write/read device (1) for the contactless communication with at least one transponder has a first encoder (4) for coding a data block (DB) in accordance with a first coding method, which first encoder (4) can generate at the most a given number of N coding signals (KI) per data block (DB) in accordance with this first coding method, and has a second encoder (9) for coding a data block (DB) in accordance with a second coding method, which second encoder (9) can generate at the most a given number of M coding signals (KI) per data block (DB) in accordance with this second coding method, and has a selection circuit (10) for the selection between the coding signals (KI) supplied by the first encoder (4) and the coding signals (KI) supplied by the second encoder (9).

Abstract: Data transmission from a data carrier (D) to a station (1) normally takes place by load modulation of a non-modulated carrier signal (CS) by means of an auxiliary carrier signal (SCS1), test means provided in the station then test the correct data transmission and, upon detection of disturbed data transmission, a change over is made to an other transmission mode in which data transmission takes place from the data carrier (D) to the station (1) by means of load modulation of the non-modulated carrier signal (CS) by means of at least one other auxiliary carrier signal (SCS2).

Abstract: A data carrier (2) can communicate with a station (1) during a respective time slot (TS) within successively generated time slot sequences (TSS), the data carrier (2) being provided with time slot fixation means (83) by means of which fixation means (83) the data carrier (2) can be fixed each time to the same respective time slot (TS) of successively generated time slot sequences (TSS).

Abstract: A data carrier (2) can communicate with a station (1) during a respective time slot (TS) within successively generated time slot sequences (TSS), the data carrier (2) being provided with time slot fixation means (83) by means of which fixation means (83) the data carrier (2) can be fixed each time to the same respective time slot (TS) of successively generated time slot sequences (TSS).

Abstract: A communication station (1) for contactless communication with at least one transponder (2) contains station identification-generating means (7) by means of which a station identification signal (SIDB) can be generated, which can be delivered to the transponder (2) and which can be analyzed in the transponder (2), for which purpose the transponder(2) has station identification signal detection means (45) and station identification signal storage means (46) and station identification signal comparison means (47).

Abstract: In a method of communicating between a communication station (1) and at least one data carrier (2 (DC)) comprising an information data block (IDB) and useful data (UD=N×UDB), an inventorization procedure with successive procedure runs is carried out at least one part of a block region (NKP-IDB) of the identification data block (IDB) not yet known in the communication station (1) and, in addition, specific useful data (n×UDB) are transmitted from each data carrier (2 (DC)) to the communication station (1) in the implementation of the inventorization procedure, such that after termination of the inventorization procedure at least one part of the identification data block (IDB) of each data carrier (2 (DC)) and the associated specific useful data (n×UDB) are known in the communication station (1).