| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wireless tag reader, a wireless tag system, a program, and a wireless communication method, capable of detecting wireless tags inside a detectable region, in a short time. <P>SOLUTION: A plurality of the wireless tags, each storing tag information and the wireless tag reader, conduct communication with each other. When the wireless tag reader simultaneously transmits a read request signal to a plurality of the wireless tags, each wireless tag codes a Bloom filter, generated from the tag information which each wireless tags stores on the basis of the Bloom filter algorithm, by using a prescribed coding system to produce a Bloom filter signal, and transmits the produced Bloom filter signal to the wireless tag reader, and the wireless tag reader simultaneously receives the Bloom filter signals from a plurality of the wireless tags to acquire collided Bloom filter signals, decodes the collided Bloom filter signals, to acquire a composite Bloom filter resulting from ORing the Bloom filters, and verifies the tag information given to the tag reader, in advance, on the basis of the composite Bloom filter. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
