| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processing system, an information processing device, an information processing method, and a program that can easily keep track of the position of an object, such as a protege, in a wide area.SOLUTION: If part of a plurality of portable communication devices 3 (second portable communication devices) are situated in a search area for a server 2 (information processing device) to search for a transmission device 4 (first portable communication device), the server keeps track of the position of the transmission device 4 on the basis of a prescribed data set transmitted by a plurality of portable communication devices 3 situated in the search area.SELECTED DRAWING: Figure 1 |
