Information processing device, and information processing system

An information processing device configured to receive an instruction at a position on an input surface from a plurality of operators holding corresponding mobile terminals, and configured to display an indication of the instruction, the information processing device comprising:

• a detector configured to detect the position of the instruction on the input surface, the instruction being received from the operator;
• a receiver configured to receive radio waves output from the mobile terminals held by the plurality of operators;
• a retrieval unit configured to retrieve, from each of the radio waves received by the receiver, an output terminal identification information item for identifying the mobile terminal that outputs the radio wave;
• an identification information storage unit configured to store operator identification information items for identifying the corresponding operators of the plurality of operators, and the output terminal identification information items, while associating the operator identification information items with the output terminal identification information items;
• a measurement unit configured to measure a strength level of each of the radio waves received by the receiver;
• an identifying unit configured to identify, based on the strength levels of the radio waves measured by the measurement unit and the output terminal identification information items, the output terminal identification information item of the radio wave that is output from the mobile terminal held by the operator who inputs the instruction for which the position is detected by the detector;
• an instruction storage unit configured to store the operator identification information item that is associated with the output terminal identification information item identified by the identifying unit, the operator identification information item being associated with the output terminal identification information item by the identification information storage unit, and the instruction position information indicating the position of the instruction detected by the detector, while associating the operator identification information item with the instruction position information;
• and
• a display unit configured to display the indication of the instruction corresponding to the instruction position information that is stored by the instruction storage unit, so that the operator who inputs the instruction is identified based on the operator identification information item that is associated with the instruction position information in the instruction storage unit.

An information processing system configured to execute a process based on a command received from an operator, the information processing system comprising:

• a receiver configured to receive radio waves output from one or more mobile terminals;
• a retrieval unit configured to retrieve, from each of the radio waves received by the receiver, an operator identification information item for identifying an operator carrying the mobile terminal that outputs the radio wave;
• a measurement unit configured to measure a radio wave strength level of each of the radio waves received by the receiver;
• a first storage unit configured to store, for each operator identification information item retrieved by the retrieval unit, the radio wave strength level measured by the measurement unit;
• an identifying unit configured to identify, based on the radio wave strength levels stored for the corresponding operator identification information items, the operator identification information item output by the mobile terminal carried by the operator who inputs the command to the information processing system;
• and
• a controller configured to control execution of the process requested by the operator identified by the identified operator identification information item.