Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1998-02-19
2000-05-09
Patel, Ajit
Multiplex communications
Communication over free space
Combining or distributing information via time channels
370449, 34082508, 34082554, H04L 100
Patent
active
060613440
ABSTRACT:
A method of establishing wireless communications between an interrogator and individual ones of multiple wireless identification devices, the method comprising utilizing a tree search method to attempt to identify individual ones of the multiple wireless identification devices so as to be able to perform communications, without collision, between the interrogator and individual ones of the multiple wireless identification devices, a search tree being defined for the tree search method, the tree having multiple nodes respectively representing subgroups of the multiple wireless identification devices, wherein the interrogator transmits a command at a node, requesting that devices within the subgroup represented by the node respond, wherein the interrogator determines if a collision occurs in response to the command and, if not, repeats the command at the same node. An interrogator configured to transmit a command at a node, requesting that devices within the subgroup represented by the node respond, the interrogator further being configured to determine if a collision occurs in response to the command and, if not, to repeat the command at the same node.
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Micro)n Technology, Inc.
Patel Ajit
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