Method of addressing messages and communications system
USRE40686E1 · kind E1 · reissue
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2003 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Aug 28, 2023 |
Classification
- Technology area (CPC —)General
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 the 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.