Abstract: Embodiments disclose communication processors, processing devices, and methods of performing communications with communication devices.

Abstract: A communication processing device includes: an instruction transmitting unit 101 transmitting an segment number designating instruction serving as an instruction designating a number of segments so as to perform division communication with a plurality of communication apparatuses 200 having identifying information; a collision number acquiring unit 103 acquiring a number of collisions serving as the number of segments in which the collision occurs when the plurality of communication apparatuses 200 allocated to each of the segments having the number of segments designated by the segment number designating instruction perform a communication for each allocated segment; a communication apparatus number estimating unit 104 estimating the number of the plurality communication apparatuses 200 based on the number of segments designated by the segment number designating instruction and the number of collisions; a segment number acquiring unit 105 acquiring the number of segments corresponding to the estimated the nu

Abstract: The invention provides a tag communication device, a tag moving direction detecting system and a tag moving direction detecting method able to detect the moving direction of a moving body attaching a RFID tag thereto by simple processing, and able to easily detect the moving direction even when its moving speed is increased. A scan antenna scans a beam of a transmitted radio wave toward a belt conveyer for conveying baggage with a RFID tag. ID is read from the RFID tag, and reading NO. and a scan angle are related and recorded to a measuring data table, and plot data are generated. These plot data are plotted in an XY coordinate system, and a plot graph is generated. Further, a linear approximate straight line is calculated from this plot graph, and a moving direction of the baggage is detected from an inclination value of the linear approximate straight line.