×

Sychronization during anti-collision

  • US 20070164850A1
  • Filed: 12/09/2004
  • Published: 07/19/2007
  • Est. Priority Date: 12/19/2003
  • Status: Active Grant
First Claim
Patent Images

1. An RFID device for non-contact communication with other RFID devices (1, 2, 2

  • , 2

    , 2



    ) of an RFID system by means of modulated electromagnetic signals (SS), which contain data and/or commands packed in data frames, in which a group of data frames (D-SYNC) contains synchronization information (Preamble, Start Delimiter) for synchronization of mutually communicating RFID devices, and another group of data frames (D-NOSYNC) does not contain any such synchronization information, with synchronizing means (14, 20, 21) configured to effect synchronization of the RFID device by synchronizing information (Preamble, Start Delimiter) contained in received data frames and with synchronization status test means (15, 15

    , 15



    , 22) configured to detect whether the RFID device (2, 2

    , 2

    , 2



    ) runs synchronously with at least one other RFID device (1) of the RFID system, from which it receives data frames, and in the event of not running synchronously to switch on the synchronizing means (14, 20, 21), in which event the synchronizing means can preferably be switched off automatically after the synchronization has been effected.

View all claims
  • 13 Assignments
Timeline View
Assignment View
    ×
    ×