System for the transmission of data from a data carrier to a station by means of one or at least one other auxiliary carrier signal

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 (SCS 1 ), 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 (SCS 2 ).

1 . A method for the contactless transmission of data (DA) from a data carrier (D) to a write/read station ( 1 ), wherein 
 the write/read station ( 1 ) generates a carrier signal (CS) and the generated carrier signal (CS) is applied to contactless operative transmitter means ( 20 ) of the write/read station ( 1 ), wherein a carrier signal (CS) is obtained in the data carrier (D) by means of contactless operative transmitter means ( 40 ) of the data carrier (D) which are coupled to the transmitter means ( 20 ) of the write/read station ( 1 ) in a contactless manner, wherein load modulation of the carrier signal (CS) is performed by means of one auxiliary carrier signal (SCS 1 ) in a transmission mode for the transmission of a data block (DB) from the data carrier (D) to the write/read station ( 1 ),    wherein the carrier signal (CSB) load modulated by means of the one auxiliary carrier signal (SCS 1 ) is demodulated by means of demodulation means ( 25 ) in the write/read station in order to obtain the transmitted data block (DB),    wherein a test is performed in the write/read station ( 1 ) in order to determine whether disturbances occur in the signal path beyond the demodulation means ( 25 ), and    wherein control information is generated upon detection of disturbances,    characterized in that 
 at least one transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) is generated as control information,  
 that the transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) is transmitted to the data carrier (D),  
 that the transmitted transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) is evaluated in the data carrier (D), and  
 that, in conformity with the evaluation of the transmitted transmission mode data block (MDB 1 , MDB 2 , MDB 3 ), the data carrier (D) is controlled to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) is performed by means of at least one other auxiliary carrier signal (SCS 2 ), the at least one frequency (f 2 ) of the at least one other auxiliary carrier signal (SCS 2 ) and the frequency (f 1 ) of the one auxiliary carrier signal (SCS 1 ) having different values.  
   
     
     
         2 . A method as claimed in  claim 1 , characterized in that, 
 in conformity with the evaluation of the transmitted transmission mode data block (MDB 2 ), the data carrier (D) is controlled to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) is performed by means of only the other auxiliary carrier signal (SCS 2 ).    
     
     
         3 . A method as claimed in  claim 1 , characterized in that, 
 in conformity with the evaluation of the transmitted transmission mode data block (MDB 3 ), the data carrier (D) is controlled to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) is performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 2 ).    
     
     
         4 . A method as claimed in  claim 1 , characterized in that 
 during the testing as to whether disturbances occur in the signal path beyond the demodulation means ( 25 ) a test is performed so as to determine whether the disturbances are due to an error occurring during the load modulation of the carrier signal (CS) by means of the one auxiliary carrier signal (SCS 1 ), and    that, in the case of a positive result of this test, a transmission mode data block (MDB 2 , MDB 3 ) associated with this test result is generated, transmitted to the data carrier (D) and evaluated in the data carrier (D).    
     
     
         5 . A method as claimed in  claim 1 , characterized in that 
 during the testing as to whether disturbances occur in the signal path beyond the demodulation means ( 25 ) a test is performed so as to determine whether an interference signal imitating a useful signal is present beyond the demodulation means ( 25 ) during a transmission pause in which no load modulation of the carrier signal (CS) is performed by means of the one auxiliary carrier signal (SCS 1 ) in the data carrier (D), and    that, in the case of a positive result of this test, a transmission mode data-block (MDB 2 , MDB 3 ) associated with this test result is generated, transmitted to the data carrier (D) and evaluated in the data carrier (D).    
     
     
         6 . A write/read station ( 1 ) for the contactless reception of data from a data carrier (D), which station includes 
 carrier signal generating means ( 7 ) for generating a carrier signal (CS), and    contactless operative transmitter means ( 20 ) which can be supplied with the carrier signal (CS) and can be coupled to contactless operative transmitter means ( 40 ) of the data carrier (D) in a contactless manner so that a carrier signal (CS) can be obtained in the data carrier (D) by means of the transmitter means ( 40 ) of the data carrier (D), in which load modulation of the carrier signal (CS) can be performed by means of one auxiliary carrier signal (SCS 1 ) in a transmission mode for the transmission of a data block (DB) from the data carrier (D) to the write/read station ( 1 ),    includes demodulation means ( 25 ) for demodulating the carrier signal (CSB) load modulated by means of the one auxiliary carrier signal, which demodulation means can output a data block (DB 1 ) transmitted from the data carrier (D) to the write/read means ( 1 ), and    includes test means ( 3 ) which are arranged to test whether disturbances occur in the signal path beyond the demodulation means ( 25 ), and to generate control information upon detection of disturbances,    characterized in that 
 the test means ( 3 ) are arranged to generate at least one transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) as control information whereby in the data carrier (D) an other transmission mode can be activated in which load modulation of the carrier signal (CS) can be performed by means of at least one other auxiliary carrier signal (SCS 2 ) in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), the at least one frequency (f 2 ) of the at least one other auxiliary carrier signal (SCS 2 ) and the frequency (f 1 ) of the one auxiliary carrier signal (SCS 1 ) having different values.  
   
     
     
         7 . A write/read station ( 1 ) as claimed in  claim 6 , characterized in that the test means ( 3 ) are arranged to generate at least one transmission mode data block (MDB 2 ) whereby in the data carrier (D) an other transmission mode can be activated in which load modulation of the carrier signal (CS) can be performed by means of only the other auxiliary carrier signal (SCS 2 ) in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ).  
     
     
         8 . A write/read station ( 1 ) as claimed in  claim 1 , characterized in that the test means ( 3 ) are arranged to generate at least one transmission mode data block (MDB 3 ) whereby in the data carrier (D) an other transmission mode can be activated in which load modulation of the carrier signal (CS) can be performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 2 ) in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ).  
     
     
         9 . A write/read station ( 1 ) as claimed in  claim 6 , characterized in that 
 the test means ( 3 ) are arranged to carry out a test as to whether the disturbances are due to an error occurring during the load modulation of the carrier signal (CS) by means of the one auxiliary carrier signal (SCS 1 ), and    that the test means ( 3 ) are arranged to generate, in the case of a positive result of this test, a transmission mode data block (MDB 2 , MDB 3 ) associated with this test result.    
     
     
         10 . A write/read station ( 1 ) as claimed in  claim 6 , characterized in that 
 the test means ( 3 ) are arranged to carry out a test as to whether an interference signal imitating a useful signal is present beyond the demodulation means ( 25 ) during a transmission pause in which no load modulation of the carrier signal (CS) is performed by means of the one auxiliary carrier signal (SCS 1 ) in the data carrier (D), and    that the test means ( 3 ) are arranged to generate, in the case of a positive result of this test, a transmission mode data block (MDB 2 , MDB 3 ) associated with this test result.    
     
     
         11 . A data carrier (D) for the contactless output of data (DA) to a write/read station ( 1 ), which data carrier includes: 
 contactless operative transmitter means ( 40 ) which can be coupled to contactless operative transmitter means ( 20 ) of the write/read station ( 1 ), where a carrier signal (CS) generated in the write/read station ( 1 ), can be obtained in the data carrier (D) in the coupled state and also includes load modulation means ( 47 ) whereby the carrier signal (CS) can be load modulated by means of one auxiliary carrier signal (SCS 1 ) in a transmission mode for the transmission of a data block (DB) from the data carrier (D) to the write/read station ( 1 ), characterized in that the data carrier (D) includes evaluation means ( 67 ) for evaluating a transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) which is transmitted to the data carrier (D) by the write/read station ( 1 ) and can control the data carrier (D) to an other transmission mode in which load modulation of the carrier signal (CS) by means of at least one other auxiliary carrier signal (SCS 2 ) can be performed in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), and    that the data carrier (D) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the data carrier (D) can be controlled, in conformity with an evaluated transmission mode data block (MDB 1 , MDB 2 , MDB 3 ), to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of at least one other auxiliary carrier signal (SCS 2 ), the at least one frequency (f 2 ) of the at least one other auxiliary carrier signal (SCS 2 ) and the frequency (f 1 ) of the one auxiliary carrier signal (SCS 1 ) having different values.    
     
     
         12 . A data carrier (D) as claimed in  claim 11 , characterized in that 
 the data carrier (D) includes evaluation means ( 67 ) whereby a transmission mode data block (MDB 2 ) transmitted to the data carrier (D) by the write/read station ( 1 ) can be evaluated, which transmission mode data block can control the data carrier (D) to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed only by means of the other auxiliary carrier signal (SCS 2 ), and    that the data carrier (D) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the data carrier (D) can be controlled, in conformity with an evaluated transmission mode data block (MDB 2 ), to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed only by means of the other auxiliary carrier signal (SCS 2 ).    
     
     
         13 . A data carrier (D) as claimed in  claim 11 , characterized in that 
 the data carrier (D) includes evaluation means ( 67 ) whereby a transmission mode data block (MDB 3 ) transmitted to the data carrier (D) by the write/read station ( 1 ) can be evaluated and can control the data carrier (D) to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 2 ), and    that the data carrier (D) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the data carrier can be controlled, in conformity with an evaluated transmission mode data block (MDB 3 ), to an other transmission mode in which, in order to transmit a data block (DB) from the data carrier (D) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 2 ).    
     
     
         14 . A data carrier (D) as claimed in  claim 11 , characterized in that 
 the evaluation means ( 67 ) are arranged to evaluate a transmission mode data block (MDB 2 , MDB 3 ) which can be transmitted to the data carrier (D) by a write/read station ( 1 ) if disturbances can be detected in the write/read station ( 1 ) in the signal path beyond the demodulation means ( 25 ), on the basis of an error occurring during the load modulation of the carrier signal (CS) by means of the one auxiliary carrier signal (SCS 1 ), and    that the data carrier (D) can be controlled to an other transmission mode in conformity with the evaluation of this transmission mode data block (MDB 2 , MDB 3 ).    
     
     
         15 . A data carrier (D) as claimed in  claim 11 , characterized in that 
 the evaluation means ( 67 ) are arranged to evaluate a transmission mode data block (MDB 2 , MDB 3 ) which can be transmitted to the data carrier (D) by a write/read station ( 1 ) if an interference signal imitating a useful signal can be detected in the write/read station ( 1 ) in a transmission pause in which no load modulation of the carrier signal (CS) is performed by means of the one auxiliary carrier signal (SCS 1 ) in the data carrier ( 2 ), and    that the data carrier (D) can be controlled to an other transmission mode in conformity with the evaluation of this transmission mode data block (MDB 2 , MDB 3 ).    
     
     
         16 . An integrated circuit ( 42 ) for a data carrier (D) for the contactless output of data (DA) to a write/read station ( 1 ), which integrated circuit includes: 
 connection means ( 43 ) for the connection of contactless operative transmitter means ( 41 ) which can be coupled to contactless operative transmitter means ( 21 ) of the write/read station ( 1 ), where a carrier signal (CS) generated in the write/read station ( 1 ) can be obtained in the circuit ( 42 ), in the coupled state, and    also includes load modulation means ( 47 ) whereby the carrier signal (CS) can be load modulated by means of one auxiliary carrier signal (SCS 1 ) in a transmission mode for the transmission of a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), characterized in that    the circuit ( 42 ) includes evaluation means ( 67 ) for evaluating a transmission mode data block (MDB 1 , MDB 2 , MDB 3 ) which is transmitted to the circuit ( 42 ) by the write/read station ( 1 ) and can control the circuit ( 42 ) to an other transmission mode in which load modulation of the carrier signal (CS) can be performed by means of at least one other auxiliary carrier signal (SCS 2 ) in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), and    that the circuit ( 42 ) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the circuit ( 42 ) can be controlled, in conformity with an evaluated transmission mode data block (MDB 1 , MDB 2 , MDB 3 ), to an other transmission mode in which, in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of at least one other auxiliary carrier signal (SCS 2 ), the at least one frequency (f 2 ) of the at least one other auxiliary carrier signal (SCS 2 ) and the frequency (f 1 ) of the one auxiliary carrier signal (SCSL) having different values.    
     
     
         17 . An integrated circuit ( 42 ) as claimed in  claim 16 , characterized in that 
 the circuit ( 42 ) includes evaluation means ( 67 ) whereby a transmission mode data block (MDB 2 ), transmitted to the circuit ( 42 ) by the write/read station ( 1 ) can be evaluated, which transmission mode data block can control the circuit ( 42 ) to an other transmission mode in which, in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed only by means of the other auxiliary carrier signal (SCS 2 ), and    that the circuit ( 42 ) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the circuit ( 42 ) can be controlled, in conformity with an evaluated transmission mode data block (MDB 2 ), to an other transmission mode in which, in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed only by means of the other auxiliary carrier signal (SCS 2 ).    
     
     
         18 . An integrated circuit ( 42 ) as claimed in  claim 16 , characterized in that 
 the circuit ( 42 ) includes evaluation means ( 67 ) whereby a transmission mode data block (MDB 3 ) transmitted to the circuit  42  by the write/read station ( 1 ) can be evaluated and can control the circuit ( 42 ) to an other transmission mode in which, in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 2 ), and    that the circuit ( 42 ) includes control means ( 68 ) which can be influenced by the evaluation means ( 67 ) and whereby the circuit ( 42 ) can be controlled, in conformity with an evaluated transmission mode data block (NDB 3 ), to an other transmission mode in which, in order to transmit a data block (DB) from the circuit ( 42 ) to the write/read station ( 1 ), load modulation of the carrier signal (CS) can be performed by means of the one auxiliary carrier signal (SCS 1 ) and the other auxiliary carrier signal (SCS 1 ).    
     
     
         19 . An integrated circuit ( 42 ) as claimed in  claim 16 , characterized in that 
 the evaluation means ( 67 ) are arranged to evaluate a transmission mode data block (MDB 2 , MDB 3 ) which can be transmitted to the circuit ( 42 ) by a write/read station ( 1 ) if disturbances can be detected in the write/read station ( 1 ), in the signal path beyond the demodulation means ( 25 ), on the basis of an error occurring during the load modulation of the carrier signal (CS) by means of the one auxiliary carrier signal (SCS 1 ), and    that the circuit ( 42 ) can be controlled to an other transmission mode in conformity with the evaluation of this transmission mode data block (MDB 2 , MDB 3 ).    
     
     
         20 . An integrated circuit ( 42 ) as claimed in  claim 16 , characterized in that 
 the evaluation means ( 67 ) are arranged to evaluate a transmission mode data block (MDB 2 , MDB 3 ) which can be transmitted to the circuit ( 42 ) by a write/read station ( 1 ) if an interference signal imitating a useful signal can be detected in the write/read station ( 1 ) in a transmission pause in which no load modulation of the carrier signal (CS) is performed by means of the one auxiliary carrier signal (SCS 1 ) in the circuit ( 42 ), and    that the circuit ( 42 ) can be controlled to an other transmission mode in conformity with the evaluation of this transmission mode data block (MDB 2 , MDB 3 ).