JPH0322665A - Signal monitor control system - Google Patents

Abstract

PURPOSE:To surely prevent malfunction of a mobile terminal equipment during information transmission by stopping a signal monitor function with the end of line connection including a radio line between the mobile terminal equipment and a connector. CONSTITUTION:An information terminal equipment 3 connects to an interface section 2 at the outside of a mobile terminal equipment 1 and after a line is set by the transmission and reception of a control signal between the mobile terminal equipment 1 and a connector 4, the mobile terminal equipment 1 stops the monitor operation of a signal monitor section 6. Thus, the control of reception discrimination of the control signal such as a line connection control signal or the like is not implemented and even when transmission information similar to the control signal is included, the line connection state is not changed and the information transmission by the information terminal equipment 3 is implemented without error.

Description

[Detailed Description of the Invention] [Summary] Malfunctions during information transmission regarding a signal monitoring control method in a system that transmits information by connecting an information terminal device such as a computer to a mobile terminal device such as a cordless telephone. With the aim of reliably preventing this, a wireless line is established between a mobile terminal device that can perform voice calls and connect an information terminal device to an external interface, and a connecting device connected to a switching network via a central office line. In a system in which a control signal such as a line connection control signal and a transmission/reception signal of the information terminal device are transmitted within an audio signal band, the mobile terminal device is configured to monitor the control signal. A monitoring stop section is provided that stops the monitoring operation of a signal monitoring section that controls each section, and when the information terminal device transmits information, the monitoring stop section causes the signal monitoring section to stop when the line connection with the switching network is completed. In addition to stopping the signal monitoring function, we also arranged to stop the transmission of control signals from the connected device. [Industrial Application Field] The present invention relates to a signal monitoring control system in a system for transmitting information by connecting an information terminal device such as a computer to a mobile terminal device such as a cordless telephone.

The cordless telephone system uses a connecting device connected to the central office line,
A device that connects a mobile terminal device with a wireless line to make a call. An information terminal device such as a personal computer is connected to this mobile terminal device, and information is modulated into a signal in the audio signal band and transmitted. A system has been proposed, and it is desired to prevent malfunctions due to confusion between control signals such as line connection control signals and transmission information signals.

[Conventional technology]

A method has been adopted in which an information terminal device such as a personal computer is connected to a general telephone line via an acoustic coupler or a modem to transmit information.

In this case, the transmission information is, for example, 12
00bps or 2400bps speed, or 3QQbps, 600bps, 1200bps with FSX modulation
, 4800 bps, etc.

In the cordless telephone system, a connecting device connected to a switching network via a central office line and a mobile terminal device are connected via a wireless line to make a voice call.For example, the connecting device transmits data in the 400 MHz band, A communication channel in the 250 MHz band is selected and set for transmission by the mobile terminal device. Typically, control signals are transmitted via a common control channel, and a call response establishes a speech channel.

In such cordless telephone systems, a system has been proposed in which an information terminal device such as a personal computer is connected to a circuit interface section of a mobile terminal device to transmit information. In that case, information is transmitted between the information terminal device connected to the mobile terminal device and the partner information terminal device connected via the office line using a signal within the audio signal band by MSK or FSK modulation.

[Problem to be solved by the invention]

Control signals such as identification information signals and line connection control signals between the mobile terminal device and the connection device are generally set to a code length that is a multiple of 8 bits due to signal processing by a processor, etc., and are predetermined. A pattern is used. On the other hand, since the information transmitted and received by the information terminal device connected to the external interface section of the mobile terminal device includes various patterns, the information may be mistaken for a control signal and malfunction may occur.

In order to eliminate such drawbacks, it is conceivable to increase the code length of the control signal, but there is a limit to increasing the code length, and it has been difficult to reliably prevent malfunctions.

The purpose of the present invention is to reliably prevent malfunctions during information transmission. [Means for Solving the Problems] The signal monitoring control method of the present invention stops the signal monitoring function that monitors control signals after the line setting for the information terminal device is completed, and allows information transmission to occur. and the first
This will be explained with reference to the figures.

A wireless line is connected between a mobile terminal device 1, which can perform voice calls and connect an information terminal device 3 such as a personal computer to the external interface section 2, and a connecting device 4 connected to the exchange m5 via a central office line. In a system in which control signals such as line connection control signals and transmission/reception signals of the information terminal device 3 are transmitted within the audio signal band, the mobile terminal device 1 monitors the control signals and controls each part. A monitoring stop unit 7 is provided to stop the monitoring operation of the signal monitoring unit 6 to be controlled, and when information is transmitted by the information terminal device 3, the signal of the signal monitoring unit 6 is stopped from the monitoring stop unit 7 upon completion of the line connection with the exchange w15. This stops the monitoring function and also stops the operation of transmitting control signals from the connection device 4 to the mobile terminal device 1.

[Effect]

After connecting the information terminal device 3 to the external interface section 2 of the mobile terminal device 1 and setting up a line by sending and receiving control signals between the mobile terminal device 1 and the connecting device 4, the mobile terminal device 1 uses a signal monitoring section. Since the monitoring operation in step 6 is stopped, control based on reception identification of control signals such as line connection control signals will not be performed, and even if transmission information similar to control signals is included, the line connection status due to this will not be controlled. is no longer changed, making it possible for the information terminal device 3 to transmit information without error.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention, in which lO is a mobile terminal device, 1l is one antenna, 12 is a receiving section, 13 is a transmitting section, 14 is a transmitting/receiving common section, l5.16 is a switch circuit, and l7 18 is a receiver, 18 is a transmitter, 19 is a modem, 20 is an external interface section, 21 is a microprocessor (CPU) constituting the signal monitoring section 6, 22 is a buzzer for calling, and 23 stores an identification code. 24 is an operation unit including a numeric keypad, 25 is a control function stop switch for monitoring the monitoring stop unit, 30 is a connection device, 3l is an antenna, 3
2 is a receiving section, 33 is a transmitting section, 34 is a transmitting/receiving common section, 35
is the modem, 36 is the microprocessor (CPU), 3
7 is a memory that stores an identification code; 38 is a voice processing unit;
39 is an interface section.

The connecting device 30 can be replaced by the interface section 39.
tM (not shown) via a central line, and a microprocessor 36 processes control signals and controls each section. Further, the transmission signal from the transmitting section 33 is transmitted from the antenna 3l via the transmitting/receiving section 34, and the signal received by the antenna 31 is applied to the receiving section 32 via the transmitting/receiving section 34. The mobile terminal IFIO is also connected to the antenna 11 of the mobile terminal f10 via a wireless line.
The received signal is applied to the receiving unit 12 via the transmitting/receiving unit l4, and the transmitting signal from the transmitting unit 13 is applied to the transmitting/receiving unit 14.
The signal is transmitted from the antenna 11 via the antenna 11.

The telephone receiver 17 and the transmitter 18 can be used to make calls, and these can be configured as a handset or an earphone and a microphone.

Further, an information terminal device such as a personal computer or a fax machine can be connected to the external interface section 20 as shown by the dotted line. Also, using the modem 19.35, control signals such as identification codes in 8-bit multiples and line connection control signals are transmitted and received as MSK or FSK modulated signals.

Furthermore, when the control function stop switch 25 of the operation section 24 including a numeric keypad is operated after the line connection is completed, the microprocessor 2l stops the signal monitoring function. The microprocessor 21 also uses the identification code set in the memory 23 to make a call, or to identify whether or not the call is for its own mobile terminal.

3A and 3B are flowcharts of the connection device according to the embodiment of the present invention, and FIGS. 4A and 4B are flowcharts of the mobile terminal device according to the embodiment of the present invention. Explain with reference to.

When the power is turned on, the connecting device 30 and the mobile terminal device 10 perform standby operations (1) and (2), and the connecting device 30 sets the control signal to the initial state (2) and sets it to the control channel (3). Also, in the mobile terminal i110, the control channel is set. In the connection device 30, the receiving unit 32 determines whether or not a calling signal has been received (4), and if the calling signal has been received, the process moves to a calling response operation α9. If no calling signal is received, it is determined whether there is a call (5), and if there is a call, the process moves to the incoming call operation (9), and if there is no call, the channel is set to a call channel (6). , carries out carrier sense for the communication channel (7). If the carrier is detected, the communication channel is in use, so step (3)
If no carrier is detected, it is empty, so remember that communication channel (8) and proceed to step (3).
). When transitioning to the incoming call operation (9), the wholesaler sets the call channel number, performs carrier sensing on the control channel. When it is determined by carrier detection that the control channel is in use, the process moves to step (1), and when the control channel is empty without carrier detection, an incoming call signal is transmitted from the transmitter 33 (self). Then, the wholesaler determines whether or not an incoming call response signal has been received, and checks whether 4 seconds have elapsed since the incoming call signal was sent. Then, after 4 seconds have elapsed, it is assumed that the mobile terminal is absent and the process moves to step (1). When an incoming call response signal is received, the process moves to the capture operation aS. Also, when a calling signal is received from the mobile terminal 210,
The process moves to the call response operation α9, sets the communication channel number (1, transmits the call response signal from the transmitter 33, and moves to αD, the capture operation α).

When the capture operation starts, the transmitting/receiving channel is set to the speech channel, Q-, it is determined whether or not the speech channel switching completion signal has been received (self), and if it cannot be received, the step of the standby operation (
1), and when received, starts emitting radio waves (
21). Then, identify whether it is an incoming call duty or an outgoing call response action (
22), in the case of a calling operation, the process moves to a telephone conversation operation (26). In the case of an incoming call operation, the process moves to a connection operation (23), transmits a bell ringing signal (24), determines whether an off-hook signal from the mobile terminal device IO has been received (25), and if it has been received. The process moves to the call operation (26). Then, it is determined whether the insensitivity state has passed for 10 seconds (27
), if 10 seconds have passed, move to step (1),
If 0 seconds have not elapsed, it is determined whether the control function stop switch 25 has been operated (28), and if it has not been operated, it is determined whether the telephone operation control signal 4B has been received (29);
Dial. In response to a telephone operation such as hooking (3l), it is determined whether an on-footer signal and a call end signal have been received (32>), and if the call is ended, the process moves to step (1).

If an information terminal device is connected, the control function stop switch 25 provided on the operating section 24 of the mobile terminal device 10 is operated when the line connection is completed and the call operation is started (26). As a result, a control function stop signal is transmitted for the first time, and thereafter the control function is stopped (30). That is, the connection device 3
From 0, stop sending control signals for line connection control.
Then, the process moves to step (32) in which it is determined whether or not the conversation is over. In addition, the mobile terminal device 210 sets the transmission/reception channel to the control channel, receives the control signal intermittently, determines whether or not there is a call request from the mobile terminal device IO or the information terminal device, and makes the call. If there is a request, the process moves to calling operation (■). If there is no call request, the receiver l2 identifies whether or not an incoming call signal has been received (2), and if it has been received, the process moves to the incoming call response operation (3). Then, the incoming call response signal is transmitted to the transmitter 13.
The data is transmitted from {circle around (2)}, and the process moves to capture operation O.

In addition, when transitioning to the calling operation ■, the calling signal is sent to the transmitter 13.
, and determines whether or not a call response signal has been received from the connecting device 30 [phase]. If the call response signal cannot be received, the radio wave emission is stopped, and the process moves to step ■.
When the call response signal is detected magnetically, the acquisition operation shifts to 0. When the acquisition operation [phase] shifts, the transmitting/receiving channel is set to the speech channel to 0, carrier sensing of the speech channel is performed [phase], and carrier detection is performed. If the communication channel is in use, it is set as a control channel (1), a signal indicating that the communication channel is in use is transmitted [phase], and the communication channel is suspended. If the carrier of the communication channel is not detected and is determined to be free, the process moves to connection operation O. Then, @. transmits a call channel switching completion signal. The connection device 30 determines whether or not this speech channel switching completion signal has been received in step rs.

After transmitting the call channel switching completion signal, identify whether it is an incoming call operation or an outgoing call operation [phase], and if it is an incoming call operation, determine whether or not a bell ringing signal has been received [phase], and send the bell ringing signal. When received, the bell 22 will ring ■.

Also, if the bell ringing signal is not received despite the incoming call operation, the process moves to step 2.

After the bell rings, it determines whether there is an incoming call response request or not, ◎, and when the incoming call is answered using an off-footer, etc., the call operation moves to ◎. Then, it is determined whether the insensitivity state has passed for lO seconds [phase], l
If O seconds have elapsed, the process moves to step (2). If 10 seconds have not elapsed, it is determined whether there is a request to operate the control function stop switch 25 [phase], and if the information terminal device is not connected, the control function stop switch 25 is not operated. It is determined whether there is a request to operate the telephone [phase], and if there is an operation request, an operation control signal corresponding to the operation on the operation unit 24 is transmitted. Then, it is determined whether or not there is a call termination request [phase], and if there is not, the process moves to step [phase], and if there is, an on-hook signal and a call termination signal are transmitted [phase]
, move to step ■.

If the information terminal device is connected, the control function stop switch 25 is operated after transitioning to call operation 0, that is, after the line connection is completed. As a result, a control function stop signal is transmitted only for the first time, and thereafter the control function is stopped O0, and the process moves to step [phase].

By stopping the control function, the signal monitoring function of the mobile terminal device 10 is stopped, and it is possible to reliably prevent the mobile terminal device 10 from malfunctioning due to information transmitted and received by the information terminal device.

In the above embodiment, an information terminal device is connected to the external interface section 20 of the mobile terminal device 10, and after the line connection is completed,
The control function stop switch 25 is manually operated to stop the signal monitoring function, but the microprocessor 21 recognizes that an information terminal device is connected to the external interface section 20 and connects the line based on this. It is also possible to automatically stop the signal monitoring function after completion. If the call end detection function is also stopped by stopping the signal monitoring function, it can be reset to the initial state by operating the reset/} switch or turning off the power.

〔Effect of the invention〕

As explained above, the present invention is applicable to the mobile terminal when an information terminal device 3 such as a personal computer is connected to the external interface section 2 of the mobile terminal device 1 and an information signal is modulated and transmitted/received within the audio signal band. Upon completion of the line connection including the wireless line between the device 1 and the connection device W4, the signal monitoring function is stopped, thereby changing the modulation method of control signals such as line connection control signals and the modulation method of transmission information. Even if they are the same, there is an advantage that malfunctions of the mobile terminal device 1 during information transmission can be reliably prevented.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 is a block diagram of an embodiment of the invention, Figs. 3A and 3B are a flowchart of a connecting device according to an embodiment of the invention, and Figs. 4A and 4B. shows a flowchart of a mobile terminal device according to an embodiment of the present invention. 1 is a mobile terminal device, 2 is an external interface section, 3 is an information terminal device, 4 is a connecting device, 5 is a switching network, 6 is a signal monitoring section, and 7 is a monitoring stop section.

Claims (1)

[Claims] A mobile terminal device (1) capable of making a voice call and connecting an information terminal device (3) to an external interface section (2), and a mobile terminal device (1) connected to a switching network (5) via a central office line. connection device (4
) in a system in which a control signal such as a line connection control signal and a transmission/reception signal of the information terminal device (3) are transmitted within the audio signal band, respectively. The terminal device (1) is provided with a monitoring stop section (7) that stops the monitoring operation of a signal monitoring section (6) that monitors the control signal and controls each section, and when the information terminal device (3) transmits information. , upon completion of the line connection with the switching network (5), the monitoring stop section (7) stops the signal monitoring function of the signal monitoring section (6), and the control signal from the connection device (4) is stopped. A signal monitoring control method characterized by stopping the transmission operation of the signal.