JP3274962B2 - Mobile phone standby method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of waiting for a mobile telephone, and more particularly to a PHS, a portable telephone, etc., which can reliably receive an incoming call which has been out of service at the time of off-hook operation but has subsequently entered the service area. The present invention relates to a mobile phone standby method.

[0002]

2. Description of the Related Art In recent years, a PHS (Personal Handy Phone System) that enables a digital cordless telephone handset to be used outdoors has been put into practical use and is rapidly spreading. FIG. 6 shows the operation of the PHS during standby.
First, an on-hook mode is set, off-hook display is turned off (step S1), and it is checked whether a control channel for transmitting and receiving various control information with the base station is established (step S2). If the acquisition is successful, the control channel is turned on (step S3), and if the acquisition is successful, the control channel is assumed to be established and the coverage display is turned on (steps S5, S3). If the current acquisition fails, the control channel is not established and the area display is turned off (steps S5 and S6).

Next, it is determined whether there is an incoming call (step S).
7) If there is an incoming call, the process proceeds to a predetermined incoming call process including generation of a ringing tone (step S8). If not, step S7
If there is no incoming call, it is checked whether an off-hook operation has been performed by pressing the off-hook key (step S).
9) If not, return to step S2. If the off-hook operation has been performed, the mode is set to the off-hook mode, the off-hook display is turned on (step S10), and it is determined whether the control channel is in the service area where the control channel has been established or the control channel has not been established (step S11). . If it is in the service area, predetermined transmission processing including generation of a service area tone (continuous tone of 400 Hz) is performed, and connection is made with the partner station dialed by the user in cooperation with the base station (step S12). As a result, it is possible to talk with a desired party.

On the other hand, if it is determined in step S11 that the control channel is in an out-of-service state in which a control channel is not established, an out-of-service dial tone (a BT tone in which a 400 Hz tone is repeated twice) is generated (step S13). Then, it waits until the on-hook operation is performed by pressing the on-hook key (step S).
14). When the user who hears the out-of-service dial tone and finds that he is out of service area where radio waves from the base station do not reach, performs an on-hook operation, stops the out-of-service dial tone (step S15), returns to step S1, sets the off hook mode, and sets the control channel. A capturing operation is performed (steps S2 and S4). When the user enters the area where radio waves from the base station can reach, the control channel is established, the area display is turned on, and transmission is possible (step S).
5, S3).

[0005]

However, in the above-described conventional waiting method, when the mobile phone is out of the service area at the time of the off-hook operation, the control channel acquisition operation is not performed unless the on-hook operation is performed.
When the user enters the area where radio waves from the base station can reach and there is an incoming call, reception becomes impossible. In view of the above-described problems of the prior art, the present invention is directed to a mobile telephone which is out of service at the time of off-hook operation, thereafter enters a service area where radio waves from the base station can reach, and can reliably receive an incoming call. Its purpose is to provide a waiting method.

[0006]

SUMMARY OF THE INVENTION In a mobile telephone standby method according to the present invention, it is always monitored whether a control channel is established with a base station. Perform the capture operation of
Turn on the in-range display or turn off the out-of-range display when the control channel is established, turn off the in-range display or turn on the out-of-range display when not established,
If the control channel is in the out-of-service state where the control channel has not been established at the time of the off-hook operation, an out-of-service dial tone is generated and the presence or absence of an incoming call is monitored. If the control channel is established during the out-of-service dial tone and an incoming call is received, It is characterized in that the process shifts to a predetermined incoming call process including a predetermined calling operation.

[0007]

According to the mobile telephone standby method of the present invention, it is always monitored whether or not a control channel has been established with the base station, and when the control channel has not been established, the control channel capturing operation is performed. Do. If the control channel is in an out-of-service state in which the control channel has not been established at the time of the off-hook operation, an out-of-service dial tone is generated and the presence or absence of an incoming call is monitored, and a control channel is established during the out-of-service dial tone and an incoming call is received. In this case, the process proceeds to a predetermined incoming call process including a predetermined call operation. With this, when the mobile terminal is out of the service area at the time of the off-hook operation, the control channel is captured without any particular operation, so that the control channel is quickly established when the radio wave from the base station arrives. You. Therefore, if there is an incoming call within a range where radio waves from the base station can reach, it can be reliably received.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a P according to an embodiment of the present invention.
It is a block diagram of HS. 1 is an antenna, 2 is a transmitting microphone, 3 is a receiving speaker, 4 is a ringer that emits a ringing tone upon receiving an incoming call under the control of a system controller described later,
A transmission / reception unit 5 transmits and receives various control information and a voice signal to and from the base station by the TDMA / TDD method (four-channel multiplex multicarrier method).
Modulation / demodulation circuit, TDMA / TDD processing circuit, ADPCM
It is composed of an audio encoding / decoding circuit, an A / D circuit, a D / A circuit and the like. The transmitting / receiving unit 5 inputs a voice signal from the transmitting microphone 2 during a call and digitizes the voice signal for transmission to the outside, or converts a digital voice signal received from the outside into an analog signal and outputs it to the receiving speaker 3. Reference numeral 6 denotes a protocol control unit composed of a microcomputer or the like, which performs a predetermined protocol control on the transmission / reception unit 5 according to an instruction of the system controller, and switches to a predetermined transmission / reception frequency in the 1.9 GHz band. A control channel that can send and receive data to and from a nearby base station (at standby),
Establish a communication channel (at the time of communication), and send / receive unit 5
The control unit notifies the system controller of various control information received from the base station via the base station, and transmits various control information output from the system controller to the base station via the transmission / reception unit 5. During standby, the protocol control unit 6 has a function of determining whether or not a control channel is currently established with the base station according to a request from the system controller and notifying the result.

Reference numeral 7 denotes a key matrix having an off-hook key, an on-hook key, a dial key, and the like, and 8 denotes an L for displaying an area display, an off-hook mode display, a dial display, and the like.
The CD display 9 is an adder for outputting various tone signals generated by the system controller to the receiving speaker 3. The tone signal includes an in-range dial tone (400 Hz continuous tone) and an out-of-range dial tone (BT tone in which a 400 Hz tone is repeated twice each). Reference numeral 10 denotes a system controller constituted by a microcomputer.
It is connected to a protocol controller 6, a key matrix 7, an LCD display 8, an adder 9, and the like. The system controller 10 controls the PHS to listen, call connection, call connection,
It performs overall various controls necessary for performing various operations such as ending the call.

FIG. 2 is a flowchart showing main standby control processing performed by the system controller 10, FIG. 3 is a flowchart showing interrupt processing periodically executed by a timer interrupt during standby by the system controller 10, and FIG. 4 is an LCD display. Explanatory drawing of the display state of the container 8, FIG.
Is a waveform diagram showing a tone signal generated by the system controller 10. The standby operation in the above embodiment will be described below with reference to these drawings.

While the system controller 10 is waiting,
According to the flow of FIG. 3, the protocol controller 6 is inquired periodically to determine whether a control channel is established (step S40). When an inquiry is made, the protocol control unit 6 determines whether a control channel has been established and notifies the system controller 10 of the result. If the control channel is established, the system controller 10
The display control of the display unit 8 is performed to turn on the in-area display and the interrupt processing is completed (step S41; see FIGS. 4A and 4B). Instruct capture (step S42), LC
The display control of the D display 8 is performed to turn off the display within the area, and the interruption processing is ended (step S43; see FIG. 4 (3)).
The protocol control unit 6 instructed to capture the control channel controls the transmission / reception unit 5 to capture the control channel. The interrupt processing of FIG. 3 is always repeated at a high speed regardless of the off-hook mode and the on-hook mode.
It monitors whether a control channel has been established with the base station, and if the control channel has not been established, performs the acquisition operation of the control channel.If the control channel is established, turns on the area display. When it is not established, the area display can be turned off.

On the other hand, the system controller 10 first sets the on-hook mode and turns off the off-hook display according to the main flow of FIG. 2 (step S20; FIG. 4).
(See (1)). Next, reception control information is input from the protocol control circuit 6, and it is checked whether an incoming call request is received from the base station (step S21). If there is an incoming call, the process proceeds to a predetermined incoming call process (step S22). , A ringing tone is generated, and when an off-hook operation is performed by pressing the off-hook key, the processing shifts to a predetermined incoming call process such as connection control. If there is no incoming call as determined in step S21, it is checked whether an off-hook operation has been performed by pressing the off-hook key (step S23), and if not, the process returns to step S20. If an off-hook operation has been performed, an off-hook mode is set and the off-hook display is turned on (step S24; see FIG. 4 (2)). Then, it is checked whether a control channel has been established for the protocol control unit 6 and the protocol control unit 6 is in a service area (step S25). If it is within the range, a tone signal of a continuous tone of 400 Hz is generated and output to the adder 9 to generate a range tone (FIG. 5).
(Refer to (1)), if the protocol control circuit 6 is instructed to make a call request to the base station or to transmit dial information in accordance with the operation of the user's dial key, and it is notified that the other party has answered the call. The process shifts to a predetermined transmission process such as connection control (step S26).

On the other hand, since it is out of reach of radio waves from the base station, when the control channel is currently out of the service area where the control channel has not been established in step S25, the 400 Hz sound
A tone signal of a BT tone that is repeated each time is generated and output to the adder 9 to generate an out-of-service dial tone (step S2).
7. FIG. 5 (2)). At this time, step S4 in FIG.
In the process of step 3, the area display on the LCD display 8 is turned off (see FIG. 4 (3)). After step S27, the system controller 10 checks whether an off-hook operation has been performed by pressing the off-hook key, whether an incoming call has been received, and whether an on-hook operation has been performed by pressing the on-hook key (steps S28 to S30). If both are NO, the system controller 10 continues to generate the out-of-service dial tone.
When the user who hears the out-of-service dial tone and finds that he is out of service area where radio waves from the base station do not reach, and performs on-hook operation,
The system controller 10 determines YES in step S30, stops the out-of-service dial tone (step S32), returns to step S20, and sets the on-hook mode.

However, in this embodiment, when the mobile phone is out of the service area at the time of the previous off-hook operation, the control channel capturing operation is repeatedly executed by the processing of FIG. 3 without performing any on-hook operation. Then, when the user enters an area where radio waves from the base station can reach, a control channel is established, the area indication is turned on, transmission is enabled, and an incoming call can be accepted (see FIG. 4 (2)). By turning on the area display,
The user knows that he has entered the area where radio waves from the base station can reach, and here, when the user performs the off-hook operation again,
The system controller 10 determines YES in step S28, and proceeds to step S25 to check with the protocol control unit 6 whether a control channel has been established. If the control channel has been established and is in a service area, a 400 Hz continuous tone signal is output. The process proceeds to a predetermined transmission process such as generation and output to the adder 9 to generate an area transmission tone (step S26).

In this way, when the mobile phone is out of the service area at the time of off-hook operation, the control channel is captured without any further operation. A control channel is established,
In addition, the user is notified that the in-service area display has been turned on or the out-of-service area display has been turned off and the user has entered the in-service area state. Therefore,
The user can immediately make a call to a desired party by performing an off-hook operation immediately. Further, when the user is out of the service area at the time of the off-hook operation, the user only has to perform the off-hook operation once to make a call, and the operation is simple.

On the other hand, if the control channel is established and there is an incoming call when an out-of-service dial tone is generated because the mobile phone is out of service at the time of the off-hook operation, step S
29 is determined as YES, the mode is set to the on-hook mode, and the LCD is
After the display 8 is controlled to turn off the off-hook display (step S31), the process proceeds to step S22 to shift to a predetermined incoming call process including generation of a ringing tone. Thereby, when the mobile phone is out of the service area at the time of the off-hook operation, the mobile phone can be surely accepted if the mobile phone enters the service area where the radio wave from the base station can reach without receiving any operation.

In the above embodiment, the PHS has been described as an example, but the present invention can be similarly applied to a portable telephone. In the case of a mobile phone, the in-service area display on and the out-of-service area display in the PHS may be replaced with the out-of-service area display and the out-of-service area display, respectively. In addition, instead of generating a ring tone when an incoming call arrives, it vibrates to notify you of the incoming call,
The light may blink. Further, the out-of-service outgoing sound is a sound in which the 400 Hz sound is periodically repeated twice each time, but may be a sound in which the 400 Hz sound is periodically emitted once each time. Also, if the PHS has a short registration / confirmation function, a step of checking the presence or absence of operation of these functions is added after NO in step S30 of FIG. After executing the processing, the process may return to step S28 or stop the out-of-service dial tone and proceed to S20, and if no operation of the shortened registration / confirmation function is performed, the process may directly return to step S28.

[0018]

According to the mobile telephone standby method of the present invention, when the mobile phone is out of service area during the off-hook operation,
After that, since the control channel capture operation is performed without any special operation, if you come to a place where radio waves from the base station reach,
A control channel is quickly established. Therefore, if there is an incoming call within a range where radio waves from the base station can reach, it can be reliably received.

[Brief description of the drawings]

FIG. 1 is a block diagram of a PHS according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating main standby control processing of a system controller.

FIG. 3 is a flowchart showing an interrupt process that is periodically executed by a system controller during a standby mode using a timer interrupt.

FIG. 4 is an explanatory diagram of a display state of an LCD display.

FIG. 5 is a waveform diagram showing a tone signal generated by a system controller.

FIG. 6 is a flowchart showing a standby control process in a conventional PHS.

[Explanation of symbols]

Reference Signs List 1 antenna 2 transmitting microphone 3 receiving speaker 4 ringer 5 transmitting / receiving unit 6 protocol control unit 7 key matrix 8 LCD display 9 adder 10 system controller

Claims (1)

(57) [Claims] The present invention constantly monitors whether or not a control channel has been established with a base station. When the control channel has not been established, the control channel capture operation is performed. If the in-range display is turned on or the out-of-range display is turned off, and if it has not been established, the in-range display is turned off or the out-of-range display is turned on. The out-of-service dial tone is generated and the presence or absence of an incoming call is monitored. If a control channel is established during the out-of-service dial tone and there is an incoming call, the processing shifts to a predetermined incoming call processing including a predetermined calling operation. A method of waiting for a mobile telephone.