COMMUNICATION SYSTEM, COMMUNICATION TERMINAL EQUIPMENT AND RADIO KEY DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce power consumption when security processing of communication terminal equipment such as a cellular phone terminal is performed by radio communication. SOLUTION: When a function of the communication terminal equipment 10 is restricted according to a radio communication state between the communication terminal equipment 10 and the radio key device 50, the function is controlled to connect communication with the communication terminal equipment 10 in the radio key device 50, the function of the terminal equipment 10 is restricted when a predetermined communication state can not be maintained with the radio key device 50 in the communication terminal equipment 10 and when it is detected that the terminal 10 exists in a predetermined area near equipment 90, etc., the function of the terminal 10 is not restricted irrespective of the communication state with the radio key device 50. COPYRIGHT: (C)2006,JPO&NCIPI