Patent ID: 7575176
Filing Date: 2009-08-18
Classification: G06K

Abstract:
1. A tag access control system for controlling data communication between a plurality of reader/writers respectively connected to a plurality of antennas provided along a moving path of one or more articles provided with one or more IC tags and the IC tags provided in the articles moving sequentially through communication ranges of the plurality of antennas, the tag access control system comprising: a storing portion storing movement information about movement of the articles and reader/writer information indicating an arrangement of the antennas connected with the reader/writers; a command accepting portion accepting, from an upper system, a command indicating an instruction to write data in the IC tags or an instruction to read data from the IC tags; a dividing portion generating a plurality of divided commands from the accepted command for executing the instruction indicated by the command; a detecting portion causing at least one reader/writer of the plurality of reader/writers to detect an identifier of at least one of the IC tags located within the communication range of the antenna in the one reader/writer; a job controlling portion generating a job list, which is data associating the plurality of divided commands with each of the identifiers of the IC tags detected by the detecting portion, and sequentially assigning the plurality of reader/writers to the plurality of divided commands in the job list according to a relationship between positions of the moving IC tags and positions of the antennas that is predicted from the movement information and the reader/writer information; and a returning portion returning a result of processing of the command accepted by the command accepting portion to the upper system based on a result of executing the plurality of divided commands.