Multiplex communications – Communication over free space – Message addressed to multiple destinations
Reexamination Certificate
2007-09-14
2011-10-18
Pham, Chi (Department: 2471)
Multiplex communications
Communication over free space
Message addressed to multiple destinations
C370S346000, C370S445000, C340S010100
Reexamination Certificate
active
08040829
ABSTRACT:
A method of establishing wireless communications between an interrogator and individual ones of multiple wireless identification devices, the method comprising combining tree search and Aloha methods to establish communications between the interrogator and individual ones of the multiple wireless identification devices without collision. A system comprising an interrogator, and a plurality of wireless identification devices configured to communicate with the interrogator in a wireless fashion, the respective wireless identification devices having a unique identification number, the interrogator being configured to employ tree search and Aloha techniques to determine the unique identification numbers of the different wireless identification devices so as to be able to establish communications between the interrogator and individual ones of the multiple wireless identification devices without collision by multiple wireless identification devices attempting to respond to the interrogator at the same time.
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Gazdzinski & Associates, PC
Hyun Soon-Dong
Pham Chi
Round Rock Research, LLC
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