COMMUNICATION TERMINAL DEVICE AND COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To detect two mobile communication terminal devices such as a wireless key device and a mobile telephone terminal device at a fixed distance in whatever holding state they are used. SOLUTION: The distance to a connection opposite-side terminal is detected based upon certain parameters and when the distance exceeds a specified value, proper distance recognition for placing the two mobile communication terminals at a specified proper distance by an automatic or manual method is performed when functions are limited and/or when a user is informed that the distance exceeds the specified value to make the devices mutually communicate information on the proper distance and further current reception states and transmission power at need, thereby adjusting the parameters used for the distance detection. COPYRIGHT: (C)2006,JPO&NCIPI