The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 08, 2014
Filed:
Mar. 12, 2009
Chanwon Park, Daejeon, KR;
Sewon OH, Daejeon, KR;
Gilyoung Choi, Daejeon, KR;
Cheolsig Pyo, Daejeon, KR;
Jongsuk Chae, Daejeon, KR;
David Tschische, Klangenfurt, AT;
Chanwon Park, Daejeon, KR;
Sewon Oh, Daejeon, KR;
Gilyoung Choi, Daejeon, KR;
Cheolsig Pyo, Daejeon, KR;
Jongsuk Chae, Daejeon, KR;
David Tschische, Klangenfurt, AT;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Cisc Semiconductor Design+Consulting GmbH, Klagenfurt, AT;
Abstract
As an RFID interrogator calculating an adaptive retransmission wait time and a control method thereof, the RFID interrogator includes a collision diagnosis unit that analyzes data on a received signal received during a receive time in correspondence with a transmitted signal from an RF communication unit that can transmit and receive signal to and from one or more tag, verifies whether or not a collision occurs in the received signal, and diagnoses a collision type depending on an analysis result of the data on the received signal; a situational command retransmission portion that determines whether or not the command is retransmitted on the basis of the occurrence of the collision and the collision type received from the collision diagnosis unit; and a random wait time calculation portion that calculates a random wait time for retransmitting the command.