Patent ID: 6775543
Filing Date: 2004-08-10
Classification: H04W

Abstract:
A cellular phone comprising:a memory part which stores, as communication history information, notification information sent from a base station and information indicating radio status when communication is performed normally without a failure, a reason why communication is not performed normally when communication is not performed normally and at least one failure arises, and notification information sent from a base station and information indicating radio status when communication is not performed normally; and an interface part which outputs said communication history information to an external terminal connected to said interface part, wherein said reason why communication is not performed normally is determined by said cellular phone; wherein said notification information sent from said base station includes a base station identification code; wherein said information indicating radio status includes a receive level of downlink wireless channel of said cellular phone in a standby status, a send power value in which send power control is performed when communication is not performed normally, a receive level of downlink wireless channel when communication is not performed normally, and quality of downlink wireless channel when communication is not performed normally; and wherein said notification information is used by said external terminal to determine whether said cellular phone is faulty, and to determine a failure type of said cellular phone from among a receive synchronization failure judgment, a receive sensitivity failure judgment, and a send power failure judgment if said cellular phone is faulty.