Patent ID: 7068148
Filing Date: 2006-06-27
Classification: G06K

Abstract:
1. A method for communicating with a plurality of radio frequency identification (RFID) tags, comprising: (a) receiving at least one symbol from the plurality of RFID tags for a first node in a binary tree having a plurality of nodes wherein each node in said binary tree is associated with a counter; (b) incrementing the counter associated with the first node in said binary tree when the at least one symbol received from said plurality of RFID tags matches a logical value associated with the counter; (c) decrementing the counter associated with the first node in said binary tree when the at least one symbol received from said plurality of RFID tags does not match the logical value associated with the counter; and (d) selecting a second node in said binary tree based on a value of the counter associated with the first node in said binary tree.