Communication terminal apparatus and communication system

Details Communication terminal apparatus and communication system Communication terminal apparatus and communication system

2007-06-05

2007-06-05

Feild, Joseph (Department: 2617)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S041200, C455S410000, C455S411000, C455S041300

Reexamination Certificate

active

11170675

ABSTRACT:
According to the present invention makes, even if two of mobile communication terminal apparatuses such as a wireless key apparatus and a mobile telephone terminal apparatus or the like are utilized in various possessing states, it is made possible to maintain a stable distance detection accuracy. In a communication apparatus in which A distance to a connection partner terminal is detected according to a certain parameter and in a case when the distance exceeds a predetermined value, a function limitation or notification to a user is carried out, it is identified that the two of the mobile communication terminals lie in a predetermined appropriate distance according to a manual or automatic method and the proper distance identification information and further receiving state and transmission power at that time if they are necessary are communicated mutually and a parameter used for a distance detection is adjusted.

REFERENCES:
patent: 6961541 (2005-11-01), Overy et al.
patent: 2001/0007817 (2001-07-01), Odagiri et al.
patent: 101 55 809 (2003-05-01), None
Patent Abstracts of Japan, vol. 2002, No. 04, Aug. 4, 2002 & JP 2001 358827 A (Mitsubishi Electric Corp), Dec. 26, 2001.
Patent Abstract of Japan, vol. 2002, No. 04, Aug. 4, 2002 & JP 2001 352579 A (NEC Corp), Dec. 21, 2001.

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