COMMUNICATION TERMINAL DEVICE, COMMUNICATION NETWORK SYSTEM, COMMUNICATION METHOD AND COMMUNICATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a communication terminal device capable of intuitively specifying an apparatus which is a cooperation target and establishing connection between cooperation apparatuses without a complicated communication establishment procedure.SOLUTION: A communication terminal device 10 comprises: a light emission unit 1 for transmitting a laser beam including an identification signal of itself; a drive unit 2 for driving the laser beam of the light emission unit 1 on a predetermined condition; a control unit 3 for controlling another block; a memory unit 4 for storing an IP address 11 as identification information of itself and controlling operation of a whole device by cooperating with the control unit 3; a communication unit 5 for communicating with a communication network 100; and a display unit 6.