System and method for initiating communications between a controller and a selected subset of multiple transponders in a common RF field

作者: Gregory M Smith

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摘要: A system and method for initiating communication between a controller selected one or other subset of multiple transponders in common RF field which each transponder has unique, (or commonly unique) preprogrammed ID number. The transmits series commands/questions to the they either respond, do not based on their number, with non-responding entering reset state. respond such way that, if can recognize that at least responded and, individual responses, is required determine how many have responded. Through use communications disclosed, sequence commands responses single out group upon its particular

参考文章(10)
James R. Lumsden, Automatic meter reading transponder ,(1980)
Henry S. Katzenstein, Programmable memory for an encoding system ,(1989)
Josef H. Schuermann, High speed read/write AVI system ,(1993)
Peter A. Hochstein, Jeffrey Tenenbaum, Thomas G. Xydis, Supervised personnel monitoring system ,(1993)
Zbigniew Siemiatkowski, Eric Malmberg, Hien Tran, Programmable object identification transponder system ,(1991)
Fusao Sekiguchi, Yoshikazu Kawashima, Ko Ishikawa, Shinichi Haruyama, Full duplex transponder system ,(1989)
Harold Dodd, Brian John Dr. Stanier, Access control equipment ,(1988)
Harold Dodd, Brian John Stanier, Coded transponder for indentification system ,(1985)