Method and devices for establishing wireless communication

摘要

A method of establishing wireless communications between an interrogator (26) and individual ones of multiple wireless identification devices (12) is provided. The wireless identification devices (12) have respective identification numbers and are addressable by specifying identification numbers with any one of multiple possible degrees of precision. The method comprises utilizing a tree search in an arbitration scheme to determine a degree of precision necessary to establish one-on-one communications between the interrogator (26) and individual ones of the multiple wireless identification devices (12). A search tree is defined for the tree search method, and the tree has multiple selectable levels respectively representing subgroups of the multiple wireless identification devices (12). The level at which a tree search starts is variable and the method further comprises starting the tree search at any selectable level of the search tree.