JP3332113B2 - Mobile communication system, controller device, mobile communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile communication system using a radio channel between a base station and a mobile station, control
And a mobile communication device .

[0002]

2. Description of the Related Art Conventionally, data communication using a public telephone network has been realized by, for example, a system configuration as shown in FIG. The communication system shown in FIG. 5 is a system in which an information processing device such as a personal computer (hereinafter abbreviated as a personal computer) 1 is connected to a public line 3 via a modem device 2 for data communication. The modem device 2 includes a modem controller 4, a modem (modulator / demodulator) 5, an NCU (Networ
k Control Unit) 6. The personal computer 1 is connected to a modem controller 4. The modem 5 modulates and demodulates data transmitted and received between the modem controller 4 and the NCU 6.

The personal computer 1 accesses a modem controller 4 based on communication software for data communication to control data input / output to / from the modem 5, control of the modem 5, and connection to the public line 3. NCU
6 is performed.

In the communication system having such a configuration, the modem controller 4 controls the NCU 6 to control connection with the public line 3 and perform transmission and reception. When disconnecting from the public line 3, the modem controller 4 outputs a hook control signal indicating on-hook to the NCU 6 to control the line disconnection.

In recent years, as a next-generation mobile telephone using digital signals instead of a telephone using analog signals, a digital cordless telephone, that is, a personal handy phone (hereinafter abbreviated as PHP) has been proposed.
Is planned.

[0006] PHP uses a small-output PHP slave (mobile station), such as a cordless telephone slave, not only at home but also at home.
By providing a public base station at a station, a shopping district, a public telephone box, or the like, it can be used outdoors.

[0007] Since PHP performs communication using digital signals, it becomes possible to perform data communication services that cannot be realized by telephones using analog signals, for example, data communication from outside. In realizing this service, a configuration has been considered in which a modem function corresponding to the modem device 2 is provided on the public base side in order to improve portability when used outdoors.

[0008]

SUMMARY OF THE INVENTION However, PHP
There are the following problems in the communication system using the communication method. Since the modem function is provided in the public base station, for example, in the case of performing personal computer communication, communication software for controlling a data communication modem conventionally connected by wire cannot be used as it is.

The base station is basically provided with a function for performing voice communication. In order to enable data communication such as personal computer communication and facsimile communication, a function for data communication including a modem function is provided. It is necessary to add a part.

That is, the function corresponding to the NCU for making, receiving, and disconnecting from / from the public line is controlled not in the function section for data communication but in the basic configuration for voice communication. In addition, since the function corresponding to the NCU is controlled from the base station side connected by the wireless transmission path, the modem controller provided in the base station has the NC controller.
Even if a function to perform U control is provided, it is not possible to directly control the NCU to make outgoing calls, incoming calls, and disconnections.

Therefore, even if an on-hook request is made to the modem controller based on the conventional communication software, the line on which data communication was being performed could not be disconnected, and the data communication could not be terminated.

The present invention has been made in view of the above-described circumstances, and a line in which data communication is performed by a hook control signal (on-hook command) output based on communication software corresponding to a conventional system. Mobile communication system and controller device
And a mobile communication device .

[0013]

According to the present invention, there is provided a mobile communication system in which a base station and a mobile station are connected via a radio transmission path, wherein the base station and the mobile station each perform voice communication. A processing circuit and a circuit that processes data communication using a modem provided in the base station, wherein the base station uses a circuit in which the base station and the mobile station process the data communication. During data communication, when the function of the modem is stopped, the modem has a modem monitoring means for notifying the mobile station of the stop of the function of the modem via the wireless transmission path, the mobile station, Circuit switching means for switching a circuit used by the mobile station and the base station from a circuit for processing the data communication to a circuit for processing the voice communication in response to the notification from the modem monitoring means. Wherein the mobile station is provided to the base station performs a switching instruction only in the circuit of outage for the modem, characterized in that to terminate the data communication.

[0014]

[0015]

A mobile communication system in which a base station and a mobile station are connected via a wireless transmission path is basically configured for voice communication and performs data communication such as personal computer communication and facsimile communication. The mobile station is connected to an information processing device or other device for communication, and the base station is provided with a data communication function including a modem (modem) for transmitting and receiving signals to and from a line. . (If the base station is a public base station used by a plurality of mobile stations, it is not necessary to provide a data communication function for each mobile station by providing the base station with a data communication function).

In this system configuration, when an end of data communication is instructed from the information processing apparatus during data communication, the base station is notified via a wireless transmission path and the modulation / demodulation function is stopped. Normally, it is not possible to disconnect the line only by stopping the modulation / demodulation function. Therefore, when the function of the modulation / demodulation function is stopped in the data communication function of the base station, a monitoring means is provided for notifying the mobile station of the stop.

In the basic configuration, line control of the base station is performed by controlling transmission, reception, line disconnection, and the like from the mobile station. Therefore, line disconnection control for the base station can be executed by notification from the monitoring means.

[0018]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of the mobile communication system in the present embodiment. As shown in FIG.
In this embodiment, a personal handy phone (hereinafter referred to as PHP
Abbreviated as).
A wireless communication function is performed between the HP slave device 10 and the base station 12.

The base station 12 is connected to the public line 14, and when a call is made from the PHP slave unit 10, the public base station 1
2. Talk with the other party via the public line 14. In addition, data communication by a personal computer (hereinafter abbreviated as a personal computer) 16 is possible via the PHP slave device 10.

The personal computer 16 and the PHP slave device 10 are connected by a connection cable 19 via a controller 18. FIG. 2 is a block diagram showing a configuration of the PHP slave device 10. As shown in FIG. 2, the PHP slave device 10 includes a microcomputer 20, a radio unit 21, an ADPCM unit 23, a receiver 24,
Button input unit 25, connector unit 28, and antenna 29
Is provided.

The microcomputer 20 controls each part of the PHP slave device 10. The microcomputer 20 receives data from the personal computer 16 input from the connector unit 28,
Button input unit 2 when dial button is pressed
The telephone function is controlled in accordance with the data input from the terminal 5.

The radio unit 21 is connected to an antenna 29, and transmits and receives data to and from the base station 12 via the antenna 29 according to a predetermined protocol. The wireless unit 21 inputs / outputs data transmitted / received to / from the base station 12 to / from the ADPCM unit 23.

The ADPCM unit 23 is provided between the radio unit 21 and the receiver 24 and has an ADPCM (Adaptive Differe
High-efficiency compression is performed by ntial Pulse Code Modulation (adaptive differential pulse code modulation). ADPC
M unit 23 converts voice data (analog voice signal) to be transmitted to base station 12 into a digital voice signal when making a voice call, and converts the digital voice signal received via radio unit 21 into an analog voice signal. And output to the receiver 24. The ADPCM unit 23 is turned on / off under the control of the microcomputer 20. ADPCM
The voice signal path (voice call) and the data signal path (data communication) are switched by turning on / off the unit 23.

The receiver 24 is used for making a telephone call, and is provided with a speaker and a microphone. The button input unit 25 controls input of a dial button (not shown) provided for operating the telephone function of the PHP slave device 10. The button input unit 25 outputs data corresponding to the pressed one of the dial buttons to the microcomputer 20. The dial buttons are used when dialing from the PHP slave unit 10, and include various function buttons such as an extension line call and an outside line call in addition to the number buttons from 0 to 9 and "*" and "#" buttons. In.

The connector section 28 is an interface for connecting to the personal computer 16 (controller section 18) via the connection cable 19 to the PHP slave unit 10. Data for data communication is sent directly to the wireless unit 21 via the connector unit 28, and PHP
A control command for controlling the slave unit 10 is a microcomputer 20.
Will be notified.

The antenna 29 is for transmitting and receiving signals to and from the base station 12. Controller 1
Reference numeral 8 denotes a signal controller for controlling the signal between the personal computer 16 and the PHP slave device 10 so that the personal computer 16 performs data communication using mobile communication. It has a function of outputting a path switching command to the PHP slave device 10 in response to an on-hook request for requesting switching of a communication path sent from the controller 49).

The controller 18 is provided with a data link 3
0 and the interface unit 32. The data link unit 30 includes the PHP slave device 10 and the base station 1
Base station 1 via a wireless function (wireless transmission path) between the base station 1
It performs input / output control of data transmitted / received to / from the data link unit 46 provided in the CPU 2 and error correction of data.

The interface unit 32 is an interface between the personal computer 16 and the data link unit 30. The controller 18 is of an IC card type that can be connected to a card interface (IC card slot) provided in the personal computer 16, for example. The card interface is, for example, JEIDA (Japan Electronic Ind.)
ustry Development Association) / PCMCIA (Pe
rsonal Computer Memory Card International Associat
ion). In addition, RS-23
Of course, other connection methods using 2C or the like may be used.

FIG. 3 is a block diagram showing a detailed configuration of the base station 12. As shown in FIG. As shown in FIG. 3, the base station 12 includes a microcomputer 40, a radio unit 41, an ADPCM unit 43, and an antenna 4
4 and a data communication unit 45 are provided. The data communication unit 45 includes a data link unit 46, a modem controller 47, a modem 48, and a hook monitoring controller 49.

Base station 12 is basically configured to implement a function for performing voice communication, and
An NCU (not shown) that performs connection processing with the microcomputer 4
Controlled by 0. Data communication via the base station 12 can be realized by adding the data communication unit 45 to the base station 12.

The microcomputer 40 controls each unit constituting the base station 12. The microcomputer 40 controls the ADPCM unit 43 in the voice communication path and the NCU (not shown) that performs connection processing with the public line 14, and also controls the data communication unit 4.
5 is provided to control the base station 12 according to data from the modem controller 47 and the data link unit 46.

The radio section 41 is connected to an antenna 44, and the PHP slave (base station) 10
Data transmission / reception is performed with a predetermined protocol. The wireless unit 41 transmits data transmitted / received to / from the PHP slave device 10 to the ADPCM unit 23 (during a voice call).
Alternatively, input and output are performed with the data link unit 46 (during data communication).

The ADPCM section 43 is provided between the radio section 41 and the public line 14, and performs high-efficiency compression by ADPCM (Adaptive Differential Pulse Code Modulation). A
The DPCM unit 43 converts voice data (analog voice signal) to be transmitted to the PHP slave unit 10 into a digital voice signal when making a voice call, and converts the digital voice signal received via the radio unit 41 into an analog voice signal. The signal is converted into a signal and transmitted to the public line 14. The ADPCM unit 43 is turned on / off under the control of the microcomputer 40. By turning on / off the ADPCM unit 43, a voice signal path (voice call) and a data signal path (data communication) are switched.

The antenna 44 is for transmitting and receiving signals to and from the PHP slave device 10. The data communication unit 45 is a function for performing data communication such as personal computer communication and facsimile communication, and is used by being added to the basic function of the base station 12 for voice communication. Therefore, the modem controller 47 in the data communication unit 45 is directly connected to the NCU (not shown) provided as a basic configuration of the base station 12.
Cannot be controlled.

The data link unit 46 is provided with a wireless function (wireless transmission path) between the PHP slave 10 and the base station 12.
A data link procedure is performed between the data link unit 30 and the data link unit 30 provided in the controller unit 18.

The modem controller 47 controls the modem 48 and sends a hook control signal indicating on-hook, that is, a high-level signal (on-hook is low level) to the hook monitoring controller 49 at the end of data communication.

The modem 48 is provided between the modem controller 47 and the public line 14, and modulates and demodulates data for data communication. The hook monitoring controller 49 includes a modem controller 47 and a data link unit 46.
When the hook control signal output from the modem controller 47 changes from the high level to the low level (indicating on-hook), an on-hook request is sent to the controller unit 18 via the data link unit 46 and the wireless communication path. The signal shown is sent.

Next, the operation of this embodiment will be described.
First, a communication path for performing normal voice communication will be described. In this case, the AD of the
The PCM unit 23 is turned on under the control of the microcomputer 20 according to the input from the button input unit 25. The ADPCM unit 43 of the base station 12 is also turned on by the microcomputer 40.

The voice input from the receiver 24 (microphone) of the PHP slave 10 becomes an analog voice signal,
The signal passes through a series of voice communication paths that are digitized by the M unit 23, modulated by the radio unit 21, and transmitted to the base station 12.

The base station 12 uses the antenna 44 to
A signal from the P slave 10 is received, demodulated by the radio unit 41, and converted into a digital audio signal. The ADPCM unit 43 converts the digital audio signal from the wireless unit 41 into an original analog audio signal, and sends the original analog audio signal to the destination via the public line 14.

Next, a communication path for performing data communication between the personal computer 16 and the other party connected to the public line 14 will be described. Digital data output from the personal computer 16 is transmitted through the interface unit 32, the data link unit 30, the connection cable 19, and the connector unit 28.
It passes through a series of data communication paths sent to the wireless unit 21 in the PHP slave device 10.

In the base station 12, digital data passed through the radio section 41, the data link section 46, and the modem controller 47 pass through a series of data communication paths where the modem 48 converts the digital data into analog electric signals.

Here, it is assumed that the personal computer 16 and the modem controller 47 are in the online mode. The process of disconnecting the line that was performing data communication by the hook control signal from this state will be described with reference to FIG.

First, as shown in FIG. 4A, the personal computer 16 and the modem controller 47 are in an online mode and are in a state where data communication is possible. Here, the personal computer 16 outputs an escape code for instructing the transition to the command mode to the controller 18 according to the communication program (FIG. 4B).

Interface section 3 of controller section 18
2 recognizes the aforementioned escape code output from the personal computer 16. The data link unit 30 transmits data indicating the content recognized by the interface unit 32 in a data format that can be transmitted and received between the data link units 30 and 46.
The data is transmitted to the modem controller 47 of the base station 12 via the data communication path of the HP slave device 10 and the base station 12 (FIG. 4C).

That is, the personal computer 14 outputs the escape code based on communication software for controlling the data communication modem connected by wire, and transmits the escape code to the base station 12 via the wireless communication path as it is. I can't come. Therefore, the data is converted into a data format that can be transmitted and received between the data link units 30 and 46 in the controller unit 18 and transmitted.

The modem controller 47 shifts to the code mode in accordance with the data from the controller 18, and notifies the personal computer 16 of data "OK" indicating that the code mode has been entered via the data communication path (FIG. 9). 4
(D)).

Here, the personal computer 16 issues a command requesting termination of data communication, that is, the on-hook instruction “AT
H ”via the data communication path to the modem controller 47
(FIG. 4E).

The modem controller 47 stops the function of the modem 48 in response to the on-hook command, and changes the hook control signal from a high level (off-hook) to a low level (on-hook). The modem controller 47 outputs a result code "OK" indicating that the modem function has been stopped.
Is notified to the personal computer 16 via the data communication path (FIG. 4 (f)). The same processing is performed not only when the on-hook instruction “ATH” is output from the personal computer 16 but also when the connection destination terminates the data communication.

On the other hand, the hook monitoring controller 49 monitors the hook control signal output from the modem controller 47, and detects that the level has changed from a high level (off-hook) to a low level (on-hook). As a result, the hook monitoring controller 49 considers that the function of the modem 48 has stopped, and issues a command “ONH” for notifying the end of the data communication (on-hook request) from the data link unit 46 to the base station 12 and the PHP slave unit 10. It is sent to the controller 18 via the route (FIG. 4 (g)).

Thus, the data communication ends (the modem 48
The interface unit 32 that has received the notification of the
A code “E” indicating the end of communication to the PHP slave 10,
That is, a command for switching the ADPCM units 23 and 43 from off to on is output (FIG. 4 (h)).

The microcomputer 20 responds to this command by
Data “SACCH” for turning on / off the ADPCM unit 43 of the base station 12 is transmitted to the base station 12 (FIG. 4).
(I)).

The data link unit 46 of the base station 12 transmits “S
When the ACCH is received, the microcomputer 40 is notified. The microcomputer 40 turns on the ADPCM unit 43 and sets “SACCH” indicating that the turning on of the ADPCM unit 43 is completed to the PH.
It is returned to the P slave 10 (FIG. 4 (j)). Further, the microcomputer 40 turns off the function of the data communication unit 45. As a result, the use path of the base station 12 is switched from the data communication path to the voice communication path.

[0054] PHP slave device 10 turns on ADPCM unit 23 in response to the "SACCH" returned from base station 12. As a result, the use route of the PHP slave device 10 is switched from the data communication route to the voice communication route. The microcomputer 20 outputs a code “a” notifying the end of the data communication to the controller unit 18.

Thus, when the data communication is terminated,
When both the PHP slave unit 10 and the connection destination (host-side telephone) are off-hook, the state is such that the voice communication path is connected, that is, the telephone is busy (FIG. 4 (l)).

When the PHP slave 10 is on-hook, a disconnection process is executed between the PHP slave 10 and the base station 12 (FIG. 4 (m)). The microcomputer 40 of the base station 12
Controls the NCU (not shown) to disconnect the line with the public line 14. When the cutting process is completed, the PHP slave 10
Outputs a code "D" indicating the wireless disconnection notification to the controller 18 (FIG. 4 (n)).

As described above, the modem controller 4 of the base station 12 receives the off-hook command from the personal computer 16.
7 turns off the function of the modem 48, the hook monitor controller 49 detects that the function of the modem 48 has been turned off by monitoring the hook control signal.
(On-hook request) is output to (mobile station). Thereby, the PHP slave device 10 instructs the base station 12 to end the communication, switches the communication route between the PHP slave device 10 and the base station 12 from the data communication route to the voice communication route, and ends the data communication. it can.

In the above embodiment, a mobile communication system using the PHP slave unit 10 as a mobile station has been described as an example. However, communication between a base station and a mobile station is performed using a wireless communication path. The present invention can be applied to a system for performing data communication.

[0059]

As described above, according to the present invention, the function of monitoring the stop of the modulation / demodulation function provided in the base station and notifying the base station when the stop is provided is provided in the conventional system. The modulation / demodulation function is stopped by a hook control signal (on-hook command) output based on the corresponding communication software, so that the line on which data communication has been performed can be disconnected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of the PHP slave device 10 according to the present embodiment.

FIG. 3 is a block diagram showing a detailed configuration of a base station 12 in the embodiment.

FIG. 4 is a diagram showing a processing procedure for explaining an operation in the embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional communication system.

[Explanation of symbols]

10 PHP slave unit (mobile station), 12 base station, 14 public line, 16 personal computer (information processing device), 18 controller section, 19 connection cable, 2
0, 40: microcomputer, 21, 41: radio section, 23, 43
... ADPCM unit, 24 ... receiver, 25 ... button input unit,
30, 46 ... data link section, 32 ... interface section, 45 ... data communication section, 47 ... modem controller,
48 modem, 49 hook controller.

Continuation of front page (56) References JP-A-5-327929 (JP, A) JP-A-5-219261 (JP, A) JP-A-5-110718 (JP, A) JP-A-2-254827 (JP) , A) JP-A-5-110709 (JP, A) JP-A-63-99662 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B ⁷ /24-7/26 H04L 13/02-13/18 H04L 29/00-29/12 H04M 11/00-11/10 H04Q 7/00-7/38

Claims (4)

(57) [Claims] 1. A mobile communication system in which a base station and a mobile station are connected via a wireless transmission path, wherein the base station and the mobile station each have a circuit for processing voice communication and a circuit in the base station. A circuit for processing data communication using a provided modem, wherein the base station performs the data communication using the circuit for processing the data communication between the base station and the mobile station; When the function is stopped, the mobile station has a modem monitoring unit for notifying the mobile station of the stop of the function of the modem via the wireless transmission path, the mobile station, when the notification by the modem monitoring unit Accordingly, the mobile station and the base station have circuit switching means for switching a circuit used by the base station from a circuit processing the data communication to a circuit processing the voice communication. Performs switching instruction only in the circuit of outage for the modem provided in a station, a mobile communication system, characterized in that to terminate the data communication. 2. The modulation / demodulation monitoring means, wherein a hook control function provided in the base station for performing hook control on the modulation / demodulation device requests the modulation / demodulation device to disconnect from the line. 2. The mobile communication system according to claim 1, wherein it is determined that the function of the modem is stopped. 3. A voice communication and modulation / demodulation connected to a public line.
To the base station that performs data communication using the device.
Transfer to perform wireless communication with a base station via a wireless transmission path
An information processing unit for performing data communication with the mobile station via the base station;
In a controller device connected to the processing device, a command requesting termination of data communication from the information processing device is provided.
To the base station in response to the command.
To notify the mobile station of the end of data communication
The base station according to information that outputs and notifies the end of the data communication.
From the information indicating the stop of the modem from the received
Communication at the mobile station from data communication to voice communication.
Information indicating the end of data communication to the mobile station to switch to
A controller device for outputting information . 4. Voice communication and modulation / demodulation connected to a public line
To the base station that performs data communication using the device.
Transfer to perform wireless communication with a base station via a wireless transmission path
In the mobile communication device, voice communication is performed by the public line via the base station.
Data communication with the voice communication circuit and the public line via the base station.
A data communication circuit for performing data communication via the data communication circuit.
With a command requesting the end of data communication from the
Data to and from the base station via the data communication circuit
End of data communication from controller device that performs communication control
From the data communication to the base station.
Control to output information to switch to voice communication
Information output means, and switching from data communication to voice communication from the base station
In response to the information indicating that the
A circuit used for wireless communication, the data communication circuit
Circuit switching means for switching from the voice communication circuit to the voice communication circuit.
A mobile communication device, comprising: