Method for searching for tag with communication error and electronic shelf label system server therefor

摘要

Disclosed herein are a method for searching for a tag with a communication error and an electronic shelf label system server. The electronic shelf label system server communicating with a plurality of gateways which are installed in a store includes: a gateway identification unit identifying the gateway, which receives a tag signal generated from a tag with a communication error, among the plurality of gateways; a signal attenuation factor measurement unit measuring a signal attenuation factor of the tag signal which is received by the identified gateway; an antenna characteristics measurement unit measuring antenna characteristics of the identified gateway; and a tag position estimation unit determining a spaced distance between the identified gateway and the tag with a communication error and estimating a position of the tag with a communication error based on a position coordinate of the identified gateway and the spaced distance.