Abstract:
The present invention relates to a mobile radio frequency identification (RFID) reader and a RFID communication method using a shared system clock. According to the present invention, clock for synchronizing the mobile RFID readers can be shared without changing hardware of a conventional RFID device. Also, since the shared clock is used, a technology for preventing a collision with the readers can be easily realized in a mobile multi-reader environment.
Abstract:
Provided is a communication method for radio frequency identification (RFID). In order to transmit a command message to an RFID tag, a RFID reader generates a command message comprising a command code indicating a type of command to be delivered to the RFID tag, a response format having one or more bits for indicating a type of additional data to be added to a response message to be received from the RFID tag (S501 ), and an identifier identifying the RFID tag; and transmits the command message to the RFID tag (S502), thereby allowing the RFID tag to immediately transmit the additional data via the response message (S503) in response to the command message (S506). Additional data comprises URL (uniform resource locator), URN (uniform resource name) or state information about a sensor connected to the RFID tag and sensor data obtained by the sensor.
Abstract:
A time division multiple access (TDMA) control method used by a mobile radio frequency identifier (RFID) reader through a mobile phone base station and a mobile RFID reader are provided. Each mobile RFID reader occupies a frequency channel during a time slot allocated through a mobile communication base station, thereby avoiding interference between readers.