Ntt Docomo, Inc.

Denso Corporation

Hiroyuki Itazu

Shogo Ito

Ryohei Kataoka

Hisashi Takeshita

Atsushi Murase

Mio Okamoto

Shuji Tachibana

Method for detecting transmission power faults in cellular telephones without detecting transmission power. A microcomputer compares a criteria B with an absolute value |Pi&#x2212;Pc| of the differential between initial transmission power value Pi and transmission power concentration value PC. A transmission power fault is determined to have occurred when the absolute value 51 Pi&#x2212;Pc| is larger than criteria B (|Pi&#x2212;Pc|&#x3e;B), so transmission power faults can be detected without detecting the transmission power.

Radio terminal and fault detection method

A method and apparatus for cellular phone failure judgment is provided, in which a cellular phone is connected to an external terminal and the external terminal reads normal communication history information, origination and receive failure history information and communication interruption history information which are stored in the cellular phone, and performs failure judgment for the cellular phone by the history information and judgment parameters.

Cellular phone, cellular phone failure judgment method and failure judgment apparatus

Growing community of inventors

Chiyoda-ku, Japan

Hiroyuki Itazu