Abstract:
PROBLEM TO BE SOLVED: To provide recognition distance measuring equipment between a tag and a reader. SOLUTION: Recognition distance measuring equipment between a tag and a reader includes an electron wave anechoic chamber configured that at least one or more unit cells, having electromagnetic waves, absorber is provided in line on an inner wall, an electromagnetic wave generator, arranged in the cell of the one side end of the electron wave anechoic chamber to emit electromagnetic waves through an antenna; and an electromagnetic wave measure which measures the electric field strength of the electromagnetic waves, discharged from the electromagnetic wave generator through an electric field probe moving in the electron wave anechoic chamber. Consequently, the accurate electric field strength can be measured from the angle and the distance between the tag and the reader. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Disclosed are an RFID reader (110), an RFID tag (120), and a controlling method thereof. The RFID tag (120) may include a state information generator (126) to generate state information of the RFID tag (120), a receiver (121 ) to receive an activation command including reference state information of the RFID tag (120), and a controller (122) to activate the RFID tag (120) based on the state information and the reference state information. The RFID tag (120) may be selectively activated according to an inner state of the RFID tag (120).
Abstract:
Ein Modulationsverfahren mittels erweiterter Pulsintervallcodierung (PIE) in einem System zur Identifikation mit Hilfe elektromagnetischer Wellen (RFID), wobei das Verfahren übertragene 2-Bit-Daten moduliert und umfasst: Einstellen einer Länge eines Symbols gemäß einem Wert des ersten Bits der übertragenen Daten; und Einstellen einer Länge eines Energieübertragungswarteabschnitts gemäß einem Wert des zweiten Bits der übertragenen Daten.
Abstract:
The present invention enables the high-speed download of a large volume of data stored in a tag memory without a remarkable change in conventional wireless communication techniques. According to one aspect of the present invention, an RFID tag comprises: a transmitting unit for transmitting a download command for instructing the download of tag data stored in a user memory bank of the RFID tag; and a receiving unit for receiving, from the RFID tag, tag data in a plurality of record block units, each of which is smaller than the size of the memory bank.
Abstract:
A time synchronization method in a wireless sensor network, a low power routing method using a reservation scheme, and an apparatus for performing the method are provided. The time synchronization method in the wireless sensor network may include: receiving a first synchronization request command packet from a parent node that manages time synchronization for a predetermined synchronization region; receiving, from the parent node, a second synchronization request command packet that has a transmission timestamp value of the first synchronization request command packet; and performing time synchronization for a child node based on a reception time of the first synchronization request command packet, a reception time of the second synchronization request command packet, and the transmission timestamp value of the first synchronization request command packet.
Abstract:
Hierin sind ein Radiofrequenz-Identifikations-(RFID-)System und sein Betriebsverfahren offenbart. Das RFID-System enthält ein RFID-Tag und einen RFID-Leser, der einen Initialisierungsbefehl zum RFID-Tag sendet. Der Initialisierungsbefehl enthält ein erstes Feld, das einen Einzeltag-Zugriffsmode und einen Mehrfachtag-Verarbeitungsmode auswählt. Der RFID-Leser führt ein Einzeltag-Authentifizierungsverfahren durch, welches ein Verfahren zum Eins-zu-EINS-Zugreifen auf ein RFID-Tag ist, in dem Fall, in welchem das Feld auf den Einzeltag-Zugriffsmode eingestellt ist.
Abstract:
A sensor node of a wireless sensor network includes a first sensor node module for generating and processing, when it is activated, a first sensing signal to detect occurrence of an event based on the first sensing signal; and a second sensor node module for generating and processing a second sensing signal, when it is activated, to monitor state transition of the event based on the second sensing signal. Further, when the occurrence of the event is detected, the first sensor node module is inactivated and the second sensor node module is activated.
Abstract:
A sensor node of a wireless sensor network includes a first sensor node module for generating and processing, when it is activated, a first sensing signal to detect occurrence of an event based on the first sensing signal; and a second sensor node module for generating and processing a second sensing signal, when it is activated, to monitor state transition of the event based on the second sensing signal. Further, when the occurrence of the event is detected, the first sensor node module is inactivated and the second sensor node module is activated.
Abstract:
Es werden hier eine Tag-Sendevorrichtung und ein Signalsendeverfahren dafür offenbart. Die Tag-Sendevorrichtung setzt mehrere Datenbits in ein Symbol um, das eines von mehreren Symbolen ist, und multipliziert das umgesetzte Symbol mit einer Rechteckschwingung mit einer vorgegebenen Frequenz, um dadurch ein Hilfsträgersignal zu erzeugen. Falls hier die mehreren Datenbits n Bits sind (wobei n eine natürliche Zahl größer als 2 ist), ist die Anzahl der mehreren Symbole 2n.