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Communication station and data carrier with improved acknowledgement measures

  • US 20020011921A1
  • Filed: 08/24/2001
  • Published: 01/31/2002
  • Est. Priority Date: 07/31/2000
  • Status: Active Grant
First Claim
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1. A method of communication between a communication station (1) and data carriers (2), which data carriers (2) are present within a communication range of the communication station (1), in which for starting an interrogation cycle (IPER) the communication station (1) supplies an interrogation signal (IDB) to all the data carriers (2) present within the communication range (1), and in which during an interrogation cycle (IPER) all the data carriers (2) present within the communication range receive the interrogation signal (IDB) and each supply a response signal (RDB) in response to the interrogation signal (IDB), and in which of all the response signals (RDB) the communication station (1) receives some of the response signals (RDB) individually and, as a consequence, separately and the communication station (1) receives some of the response signals (RDB) at least two at a time and, as a consequence, not separately, and in which the communication station (1) supplies an acknowledge signal (QDB) to any data carrier (2) whose response signal (RDB) has been received separately by the communication station (1), and in which the data carrier (2) whose response signal (RDB) has been received separately by the communication station (1) receives and evaluates the acknowledge signal (QDB), and in which as a result of the evaluation of the acknowledge signal (QDB) each data carrier (2) whose response signal (RDB) has been received separately by the communication station (1) is disabled for interrogation signals (IDB) supplied subsequently by the communication station (1), and in which after the termination of an interrogation cycle (IPER) the communication station (1) again supplies an interrogation signal (IDB) in order to start a subsequent interrogation cycle (IPER), and in which the communication station (1) generates each acknowledge signal (QDB) as a component of an extended interrogation signal (IDB+QDB).

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