|
Singulation is a method by which an RFID reader identifies a tag with a specific serial number from a number of tags in its field. This is necessary because if multiple tags respond simultaneously to a query, they will jam each other. In a typical commercial application, such as scanning a bag of groceries, potentially hundreds of tags might be within range of the reader. When all the tags cooperate with the tag reader and follow the same anti-collision protocol, also called singulation protocol,〔 Charu C. Aggarwal. ("Managing and Mining Sensor Data" ). p. 372. 〕〔 O. Savry and F. Vacherand. As collected in Daniel Giusto, Antonio Iera, Giacomo Morabito, Luigi Atzori (editors). ("The Internet of Things: 20th Tyrrhenian Workshop on Digital Communications" ). p. 418. 〕〔 Technovelgy. ("Problems With RFID" ). 〕 then the tag reader can read data from each and every tag without interference from the other tags. == Collision avoidance == Generally collision occurs when two entities require the identical resource; for example, two ships with crossing courses in a narrows. In wireless technology, collision occurs when two transmitters transmit at the same time with the same modulation scheme on the same frequency. In RFID technology, various strategies have been developed to overcome this dangerous situation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Singulation」の詳細全文を読む スポンサード リンク
|