Patent ID: 7468959
Filing Date: 2008-12-23
Classification: G08B,H04M,Y02D

Abstract:
1. A communication system comprising: a communication terminal apparatus; and a wireless key apparatus which wireless-communicates with the communication terminal apparatus by a predetermined wireless communication system and in which a mode relating to a function limitation of said communication terminal apparatus or a notification mode relating to the function limitation is set in response to a communication state between said communication terminal apparatus and said wireless key apparatus, wherein said predetermined wireless communication system is a wireless communication system in which a wireless communication is carrying out intermittently between two wireless-connected apparatuses; each of said communication terminal apparatus and said wireless key apparatus comprises: a communication circuit for carrying out a wireless communication by said predetermined wireless communication system; a control unit for controlling communication state in said communication circuit; judgment means for judging or presuming wireless communication state or wireless communication distance in said communication circuit; and when there is judgment or presumption of a predetermined state in said judgment means in a state in which said communication terminal apparatus and said wireless key apparatus are wireless-connected, a communication state in which a wireless communication is carried out intermittently is set in each communication circuit and the wireless connection is maintained, said control unit changes mode setting relating to said function limitation or notification mode setting relating to the function limitation.