Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2001-04-26
2004-08-10
Cumming, William (Department: 2683)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S425000, C455S557000
Reexamination Certificate
active
06775543
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cellular phone and a cellular phone failure judgment method.
2. Description of the Related Art
Conventionally, there are several failure judgement methods of judging whether a cellular phone fails or not. For example, the failure judgment is performed by asking the failure reporter about the failure situation and replicating the corresponding failure. Or, measurement of various kinds of static characteristics of wireless parts of the cellular phone is performed by using a measurement apparatus, and, then, the failure judgment is performed, wherein the measurement apparatus includes a measurement part for the wireless parts of the cellular phone and a cellular phone controller for controlling the wireless parts of the cellular phone for performing the measurement separately or in a body.
However, according to the conventional methods, since there is no communication history information of the cellular phone which indicates situations in which the reporter judged that the cellular phone failed, there is a problem in that it is difficult to replicate the failure situation. In addition, there is a problem in that, even when the failure situation can be replicated, it takes much time.
SUMMARY OF THE INVENTION
It is an object of the present invention to perform failure judgment immediately by performing failure judgment based on the communication history information which indicates situations in which the reporter judged that the cellular phone failed without the wireless part measurement apparatus.
The above object of the present invention is achieved by a cellular phone including:
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, a reason why communication is not performed normally when communication is not performed normally, 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 the communication history information to an external terminal connected to the interface part.
In the cellular phone, the memory part may further stores communication date and time, and operation status of the cellular phone as the communication history information.
In the cellular phone, the reason why communication is not performed normally may be determined by the cellular phone;
the notification information sent from the base station may include a base station identification code; and
the information indicating radio status may include a receive level of downlink wireless channel of the 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, quality of downlink wireless channel when communication is not performed normally.
In the above-mentioned cellular phone, wherein the communication date and time includes date and time of storing the communication history information;
the operation status includes information indicating one of operations of position registration, call origination, call receiving or communication state which the cellular phone did not perform normally.
According to the above invention, the external terminal can perform failure judgment by using the stored communication history information.
The above object of the present invention is also achieved by a cellular phone including:
a memory part which stores normal communication history information when communication is performed normally, origination and receive failure history information when origination and receive are not performed normally, and communication interruption history information when communication is interrupted;
an interface part which outputs each history information stored in the memory part to an external terminal connected to the interface part.
In the cellular phone, each of the history information may include a base station identification code; and
each of the origination and receive failure history information and the communication interruption history information may include communication failure reasons.
In the cellular phone, resynchronization waiting time out in an event of loss of synchronism may be one of the failure reason in the communication interruption history information.
In the cellular phone as claimed in claim
6
, wherein response waiting time out for call origination request signal may be one of the failure reason in the origination and receive failure history information.
According to the above invention, the external terminal can perform failure judgment by using the stored communication history information.
The above object of the present invention is also achieved by a method of cellular phone failure judgment including the steps of:
connecting a cellular phone to an external terminal, the cellular phone including 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, a reason why communication is not performed normally when communication is not performed normally, 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 the communication history information to the external terminal;
the external terminal reading the communication history information stored in the memory part of the cellular phone, and performing failure judgment for the cellular phone.
The method may further includes the steps of:
the external terminal performing failure judgment for receive synchronization and receive sensitivity in a receive system and for send power in a send system.
The method may further include the steps of:
the external terminal comparing judgment parameters stored in the external terminal and the communication history information stored in the memory part of the cellular phone, and performing failure judgment.
The method may further includes the steps of:
judging whether situations in which communication was not performed normally occurred in a plurality of base stations or in only one base station;
judging that the cellular phone is faulty only when it is judged that the situations occurred in a plurality of base stations.
Accordingly, it can be prevented that the cellular phone is judged to be faulty although the base station is faulty.
The above object of the present invention is also achieved by a method of cellular phone failure judgment including the steps of:
a cellular phone storing normal communication history information when communication is performed normally, origination and receive failure history information when origination and receive are not performed normally, and communication interruption history information when communication is interrupted;
a failure judgment apparatus reading the normal communication history information, the origination and receive failure history information and the communication interruption history information;
the failure judgment apparatus performing failure judgment for receive synchronization and receive sensitivity in a receive system and for send power in a send system.
The method may further include the step of:
the failure judgment apparatus determining which failure judgment is performed among the receive synchronization, receive sensitivity and send power according to the number of records of each of the history information.
The method may further include the step of:
the failure judgment apparatus comparing judgment parameters stored in the failure judgment apparatus and predetermined information in the history information, and performing failure judgment.
The method may further include the step of:
judging whether situations in which communication was not per
Itazu Hiroyuki
Ito Shogo
Murase Atsushi
Tachibana Shuji
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