Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1998-05-18
2001-08-14
Nguyen, Lee (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S460000, C455S550100
Reexamination Certificate
active
06275713
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a cellular phone which communicates over a radio channel, and more particularly, to a cellular phone capable of smoothly reinitiating a call after disconnection of the radio channel.
A cellular phone which communications over a radio channel disconnects the channel when the telephone unit becomes incapable of communicating as a result of a drop in the field strength. Japanese-Patent Publication 5-276101 describes a cellular phone which terminates the call when there is a drop in the field strength and reinitiates a call when the field strength recovers to its original state.
Further, Japanese Patent Publication 5-276103 describes a cellular phone which, when the channel is disconnected, reinitiates a call by pressing a one-touch call reestablishment button. Until a predetermined period of time lapses after pressing of the one-touch button, the cellular phone automatically reinitiates the call every time the channel is disconnected. After lapse of the predetermined period of time, a call is not reinitiated unless the one-touch button is pressed again.
When a conventional telephone unit receives an incoming call, the telephone unit does not reinitiate the call even if the field strength recovers to its original state. For example, even if the telephone unit at the receiving end (hereinafter simply referred to as a “receiver telephone unit”) assumes a responsibility for the deterioration of the field strength, e.g., when the receiver telephone unit is passing through a tunnel, and if the receiver telephone unit is capable of identifying whether or not the field strength is restored to its previous state by having finished passing through the tunnel, call reestablishment must be waited until the call originator reinitiates the call, thus delaying call reestablishment. If the call originator terminates call reestablishment while the channel is in a disconnected state, the call cannot be reinitiated unless the user of the receiver telephone unit dials the telephone number of the call originator.
Since the conventional cellular phone automatically reinitiates the call depending on whether or not the field strength has been restored without reference to the will of the user, there sometimes arises a case where the user leaves the telephone unit aside without knowing the fact that the channel was reconnected to the call originator.
If the field strength is not recovered for a long period of time after disconnection of the channel, there may arise a case where the user forgets that his telephone is waiting for call reestablishment after disconnection of the line.
SUMMARY OF THE INVENTION
The present invention is intended to solve the problems in the prior art such as those described above, and the object of the present invention is to provide a cellular phone capable of smoothly reinitiating a call after disconnection of a radio channel.
To this end, a cellular phone according to the present invention comprises telephone number storage means for storing a telephone number of a called party when originating a call or storing a telephone number of a calling party when receiving an incoming call; number-for-call-reestablishment registration means for storing a telephone number of the called/calling party input by the user; and call reestablishment processing means for automatically reinitiating a call by dialing the telephone number stored in the telephone number storage means or the number-for-call-reestablishment registration means.
With the foregoing configuration, even when the cellular phone receives an incoming call, the telephone unit automatically reinitiates a call if the telephone unit has received the telephone number of the calling party. In contrast, even when the telephone unit has not received the telephone number from the calling party, the telephone unit automatically reinitiates a call at a point in time when the field strength recovers to its original state by dialing the telephone number of the calling party registered by the user.
A cellular phone according to the present invention comprises telephone number storage means for storing a telephone number of a called party when originating a call or storing a telephone number of a calling party when receiving an incoming call; call reestablishment processing means for automatically reinitiating a call by dialing the telephone number stored in the telephone number storage means; call reestablishment notification means for notifying the user of call reestablishment before a call is reinitiated; and call reestablishment control means for causing the call reestablishment processing means to reinitiate a call when the user instructs the call reestablishment control means to reinitiate a call and for causing the call reestablishment processing means to abort call reestablishment when the user does not instruct the call reestablishment control means to call reestablishment.
With the foregoing configuration, the user is capable of determining whether to reinitiate a call at his will.
A cellular phone according to the present invention comprises telephone number storage means for storing a telephone number of a called party when originating a call or storing a telephone number of a calling party when receiving an incoming call; call reestablishment processing means for automatically reinitiating a call by dialing the telephone number stored in the telephone number storage means; timer means for measuring the time that elapses from disconnection of the communication channel; and call reestablishment abort means for causing the call reestablishment processing means to abort call reestablishment when the field strength does not recover to its original state within a given period of time.
With the foregoing configuration, call reestablishment would be aborted unless field-strength restores to its original state within a given period of time.
First aspect of the present invention is directed to a cellular phone which, when a communication channel is disconnected because of deterioration of field strength while a call is in progress, waits for recovery of the field strength and reinitiates a call, the cellular phone comprising: telephone number storage means for storing a telephone number of a called party when originating a call or storing a telephone number of a calling party when receiving an incoming call; number-for-call-reestablishment registration means for storing a telephone number of the called/calling party input by the user; and call reestablishment processing means for automatically reinitiating a call by dialing the telephone number stored in the telephone number storage means or the number-for-call-reestablishment registration means. Even in a case where the telephone unit receives an incoming call, the telephone unit is capable of reinitiating a call if the cellular phone receives the telephone number of the calling party. In contrast, even if the telephone unit is not notified of the telephone number of the calling party, the telephone unit is capable of reinitiating a call when the field strength recovers to its original state by dialing the telephone number of the calling party entered by the user.
Second aspect of the present invention is directed to a cellular phone which, when a-communication channel is disconnected because of deterioration of field strength while a call is in progress, waits for recovery of the field strength and reinitiates a call, the cellular phone comprising: telephone number storage means for storing a telephone number of a called party when originating a call or storing a telephone number of a calling party when receiving an incoming call; call reestablishment processing means for automatically reinitiating a call by dialing the telephone number stored in the telephone number storage means; and notification means for notifying the user of the telephone number of the calling party being not received therefrom when an incoming call is received from the calling party. The user is capable of being aware of that his telephone unit cann
Matsushita Electric - Industrial Co., Ltd.
Nguyen Lee
Pearne & Gordon LLP
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