JPH06125298A - Terminal identificatin device and digital mobile body communication equipment - Google Patents

Abstract

PURPOSE:To identify a terminal to which a call is connected by using an existent two-wire type transmission line by a mobile machine by transmitting terminal identification information by means of a signal outside a band used by the terminal. CONSTITUTION:A terminal identification device 4 is provided between a telephone set 1, facsimile equipment 2, and a personal computer 3 and the mobile machine 8. The terminal identification device 4 is provided with a mobile machine side device 7 as a first device connected to the mobile machine 8 as transmission equipment, and it is connected to the mobile machine side device 7 via a two-wire type transmission line 6, and a terminal side device 5 as a second device which houses the telephone set 1, the facsimile equipment 2, and the personal computer 3 as one or more telephone terminals or non- telephone terminals. The terminal side device 5 is provided with a subscriber line interface circuit as a detecting means to detect the call issuance of a housed terminal, and connects a call issuing terminal to the mobile machine side device 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in digital mobile communication using a high efficiency voice codec. In particular, it relates to non-telephone signal relay between a mobile station and a mobile station, or between a mobile station and a non-telephone terminal of a general telephone network.

[0002] In the present invention, a "mobile device" is a device that wirelessly communicates with a base station. Further, the "mobile station" refers to a unit including a mobile device, an antenna connected to the mobile device, and a terminal device group such as a telephone, a facsimile device, a personal computer, and the like.

[0003]

2. Description of the Related Art Although a digital mobile communication device using a high-efficiency voice codec has already been put into practical use, a high-efficiency voice codec cannot always accurately transmit a modem signal for a non-telephone terminal. Therefore, conventionally, a non-telephone signal relay interface circuit corresponding to a modem signal (hereinafter referred to as "non-telephone interface")
Is used. That is, it is necessary to provide a non-telephone interface corresponding to a non-telephone signal to be relayed between the mobile station and the radio base station, identify the type of signal to be relayed by some method, and switch between the high-efficiency voice codec and the non-telephone interface. There is.

As an example of this, Japanese Patent Laid-Open No. 3-1417
No. 33 (Japanese Patent Application No. 1-278455, hereinafter referred to as “prior application”) identifies a signal type by a mobile device detecting an off-hook signal of a mobile station side terminal device, and the identification result is a base station. Has been proposed to switch between the high-efficiency voice codec and the non-telephone interface.

[0005]

However, in the configuration shown in the above-mentioned prior application, it is necessary that each terminal device is directly connected to the high efficiency voice codec and the non-telephone interface of the mobile device. Therefore, for example, in a usage mode in which a plurality of terminal devices are connected via a two-wire telephone interface and each is switched by a network control device to connect to a mobile device, the mobile device identifies which terminal goes off-hook. Can not do it.

The usage mode in which a plurality of terminal devices are connected by a two-wire telephone interface and switched by a network control device is often used in ship telephones. At present, the analog method is used in ship telephones, and in the analog method, the voice signal and the non-voice signal are transmitted to the wireless section without distinction, so whether the terminal connected to the mobile device is a telephone or a non-telephone terminal. It doesn't matter. However, in the future, it will not be possible to support the case where the ship telephone is made digital.

The present invention solves such a problem and provides a digital mobile communication device capable of identifying a calling terminal by using an existing two-wire transmission line as it is, and a terminal identification device therefor. With the goal.

[0008]

A first aspect of the present invention is a terminal identification device, wherein the call-connected terminal is a telephone terminal for voice communication or a non-telephone that generates a non-telephone signal other than voice. A first device connected to a transmission device that performs signal transmission by switching between a high-efficiency voice codec and a non-telephone signal relay interface circuit depending on whether the terminal is a terminal or not, and a two-wire transmission path to this first device. A second device that is connected via one or more telephone terminals and accommodates non-telephone terminals,
The second device comprises a call detecting means for detecting a call of the accommodated terminal, a connecting means for connecting the call terminal to the first device, and a terminal type of the call terminal as a telephone terminal or a non-telephone. A notification unit for notifying the first device by a frequency that is not used by any of the terminals, the first device having a notification detecting unit for detecting this notification, and a connection for connecting to the transmission device according to the detected notification. And a control means.

The first device detects the incoming call to the connection control means and connects the incoming call to the second device, and the telephone terminal or the non-telephone terminal provides the information for selecting the terminal. However, the second device includes a terminal selection notifying means for notifying the second device by a frequency that is not used, and the second device detects the notification from the terminal selection notifying means, and the detection output of this terminal selection notifying detection means. And a called terminal selecting means for selecting the called terminal according to the above.

In addition, since the type of the terminal on the calling side may not be known at the time of the incoming call, the second device sets the terminal type to the telephone terminal and the non-telephone terminal when the called terminal is off-hooked. It is desirable to include an incoming call notification means for notifying the first device by a frequency that is not used in any of the above.

A second aspect of the present invention is a digital mobile communication device, which is a mobile unit to which a telephone terminal for voice communication and a non-telephone terminal for generating a non-telephone signal other than voice are connected, and a mobile unit. A wireless base station to which the machine is wirelessly connected,
The mobile device and the radio base station have a high-efficiency voice codec for voice communication, a non-telephone signal relay interface circuit for transmitting non-telephone signals, a high-efficiency voice codec and a non-telephone signal relay interface circuit. The mobile station further includes switching means for switching, and the mobile device further includes means for identifying whether the calling terminal is a telephone terminal or a non-telephone terminal, and wireless notification means for notifying the wireless base station of the identification result. Is further characterized in that, in a digital mobile communication device including means for controlling the switching means of its own station according to a notification from the mobile device, the mobile device and the terminal are connected via the above-mentioned terminal identification device. And

[0012]

A terminal identification device including a first device and a second device is installed between a mobile device and a plurality of terminal devices connected by a two-wire transmission line to identify a call-connected terminal. Since this device transmits terminal identification information using signals outside the band used by the terminal, it is possible to identify the terminal connected to the call by the mobile device using the existing two-wire transmission line. .

[0013]

1 is a block diagram showing a digital mobile communication apparatus according to an embodiment of the present invention, and FIGS. 2 and 3 are block diagram showing examples of a mobile unit 8 and a radio base station 9, respectively.

The apparatus of this embodiment is a mobile unit 8 to which a telephone set 1 is connected as a telephone terminal for voice communication and a facsimile apparatus 2 and a personal computer 3 are connected as non-telephone terminals for generating non-telephone signals other than voice. A wireless base station 9 to which the mobile device 8 is wirelessly connected is provided. The radio base station 9 is connected to the general telephone exchange network 10, and the telephone set 1, the facsimile device 2 or the personal computer 3 is connected to the mobile telephone 8, the radio base station 9 and the general telephone exchange network 10, and the destination telephone 11 and the facsimile device. 12 or a personal computer 13 can be connected.

The mobile unit 8 includes a high-efficiency voice codec 21 for voice communication, non-telephone interfaces 22 and 23 for transmitting non-telephone signals, and a high-efficiency voice codec 2.
1 and a non-telephone interface 23 are provided with an interface switching device 24 as a switching device and a transmitter / receiver 25. The interface switching device 24 is provided with a device for identifying whether a calling terminal is a telephone terminal or a non-telephone terminal. The wireless notification means for notifying the wireless base station 9 of the identification result is the transceiver 2
5 is provided.

The radio base station 9 includes a transceiver 31, a high-efficiency voice codec 33 for voice communication, non-telephone interfaces 34 and 35 for transmitting non-telephone signals, a high-efficiency voice codec 33 and a non-telephone call. Interface 34,
An interface switch 32 and a line switch 36 are provided as switching means for switching between 35 and 35. The interface switch 32 and the line switch 36 are configured to switch according to a notification from the mobile device.

The feature of this embodiment is that a terminal identifying device 4 is provided between the mobile device 8 and the telephone 1, the facsimile device 2, and the personal computer 3. This terminal identification device 4 is provided with a mobile device 7 as a first device connected to a mobile device 8 as a transmission device, and is connected to the mobile device 7 via a two-wire transmission line 6, The above-mentioned telephone terminal and non-telephone terminal are provided with a telephone 1, a facsimile apparatus 2, and a terminal-side apparatus 5 as a second apparatus for accommodating a personal computer 3.

FIG. 4 is a block diagram showing the details of the terminal device 5.

The terminal-side device 5 is provided with subscriber line interface circuits 41-1 to 41-3 as call-out detecting means for detecting the call-out of the accommodated terminal. Controller 4 as a connecting means for connecting to
5, switches 42-1 and 42-2, low-pass filter 4
3-1 and 43-2 and a two-wire to four-wire converter 44, as a notification means for notifying the type of the calling terminal to the mobile device 7 by a frequency that is not used by either the telephone terminal or the non-telephone terminal. , Controller 45, oscillator 46, multiplier 47-1, and high-pass filter 48-1.

Controller 45, oscillator 46, multiplier 4
7-1 and the high-pass filter 48-1 also call the terminal accommodated in the terminal-side device 5, and when the terminal is off hooked, the terminal type is set to a frequency that is not used by either the telephone terminal or the non-telephone terminal. An incoming call notification means for notifying the mobile device 7 is configured.

Further, the terminal-side device 5 is a high-pass filter 48-2 as a terminal-selection notification detecting means for detecting the notification of the terminal selection by the frequency from the mobile-side device 7, which is used by neither the telephone terminal nor the non-telephone terminal. , Multiplier 4
The controller 45 is provided with an incoming call terminal selecting means including the 7-2 and the low-pass filter 49 and selecting an incoming call terminal according to the detection output of this means.

When the subscriber line interface circuits 41-1 to 41-3 to which each terminal is directly connected detect the on-hook signal of the terminal, they notify the controller 45 of the signal. The controller 45 analyzes the notified signal,
Switch 4 to connect the off-hook terminal to the line
The on / off of 2-1 and 42-2 is controlled. As a result, the signal from the terminal is sent to the two-wire transmission line 6 via the corresponding subscriber line interface circuit, switch 42-1, low-pass filter 43-1 and two-wire to four-wire converter 44. The signal from the two-wire transmission line 6 to the terminal is a two-wire to four-wire converter 44, a low-pass filter 43-2,
It is transmitted via the switch 42-2 and the corresponding subscriber line interface circuit.

The controller 45 also includes a switch 42-
Simultaneously with the control of 1, 42-2, the terminal identification signal is multiplied by the multiplier 47-1 in order to notify the mobile device 7 of the signals notified from the subscriber line interface circuits 41-1 to 41-3.
Output to. At this time, the center frequency of the terminal identification signal is A
And The multiplier 47-1 outputs the oscillator 4 to the terminal identification signal.
The unmodulated carrier signal of center frequency B from 6 is multiplied. The unmodulated carrier signal generated by the oscillator 46 is set to a signal such that the frequency A + B is outside the frequency band used by each terminal. The multiplied signal contains a signal component having a center frequency A + B and a signal component having a center frequency A−B. Of these, the center frequency A
For the -B signal component, the high-pass filter 48-1
To remove. The signal whose center frequency is A + B is sent from the two-wire / four-wire converter 51 to the two-wire type transmission line 6 together with the signal transmitted through the switch 42-1 and the low-pass filter 43-1.

At the time of receiving an incoming call to the terminal, an incoming call notification by the frequency A + B which is not used by either the telephone terminal or the non-telephone terminal is input from the mobile device 7 through the two-wire transmission line 6. This incoming notification is sent to the high-pass filter 48-
2 and is multiplied by the unmodulated carrier signal of the center frequency B from the oscillator 46 in the multiplier 47-2. As a result, a signal component whose center frequency is A + 2B and a signal component whose center frequency is A are generated. Of these, the signal component of the center frequency A is taken out by the low pass filter 49 and transmitted to the controller 45. The controller 45 analyzes the signal of the center frequency A and controls the switches 42-1 and 42-2 so that the corresponding terminals are connected to the line. As a result, the signal arriving from the two-wire transmission line 6 to the two-wire to four-wire converter 44 is removed of the out-of-band signal by the low-pass filter 43-2, and the corresponding subscriber line in-line is passed through the switch 42-2. It is sent to the face circuit (any of 41-1 to 41-3) and further to the terminal connected to it.

FIG. 5 is a block diagram showing the details of the mobile device 7. Here, a case where the mobile device 7 is connected to the mobile device via the private branch exchange 60 will be described as an example.

The mobile device 7 is provided with a high-pass filter 55-1, an oscillator 56, a multiplier 57-1 and a low-pass filter 58 as a notice detecting means for detecting notice by the frequency A + B, and the premises according to the detected notice. Switches 53-1 and 53-2, network control devices 54-1 to 54-3, and a controller 59 are provided as connection control means for connecting to the exchange 60.

The switches 53-1 and 53-2 and the controller 59 are also low-pass filters 52-1 and 52-.
Together with 2, it forms an incoming call connection means for detecting an incoming call to each of the network control devices 54-1 to 54-3 and connecting the incoming call to the terminal side device 5. Controller 59 and oscillator 56 also includes multiplier 57-2 and high pass filter 55-2.
At the same time, it constitutes a terminal selection notifying means for notifying the terminal side device 5 of the information for selecting the terminal by the frequency A + B which is not used by either the telephone terminal or the non-telephone terminal.

The signal transmitted from the terminal-side device 5 via the two-wire transmission line 6 is input from the two-wire / four-wire converter 51 to the low-pass filter 52-1 and the high-pass filter 55-1. The signal that has passed through the high-pass filter 55-1 has the in-band signal removed, and the frequency A + B from the terminal-side device 5 is removed.
If there is a signal of, that signal is extracted. When this signal is multiplied by the constant carrier signal of the center frequency B generated by the oscillator 56 in the multiplier 57-1, the center frequency becomes A +
A 2B signal component and a signal component whose center frequency is A are generated. Of these, the signal component of the center frequency A is taken out by the low pass filter 58 and transmitted to the controller 59. The controller 59 analyzes the signal of the center frequency A and controls the switches 53-1 and 53-2 so that the corresponding ones of the network control devices 54-1 to 54-3 are connected to the terminal side. .

As a result, the signal coming from the two-wire type transmission line 6 to the two-wire to four-wire converter 51 is low-pass filter 52-1.
Then, the signal outside the band is removed, and the signal is transmitted to the corresponding network control device (one of 54-1 to 54-3) via the switch 53-1. Further, the signal from the line at that time is sent from the network control device to the two-wire transmission line 6 via the switch 53-2, the low-pass filter 52-2 and the two-wire / four-wire converter 51.

The mobile-side device 7 also sends information for selecting a terminal to the terminal-side device 5 when receiving a call. In order to identify the terminal on the calling side, each terminal is identified by the network controller 54-
1 to 54-3, the terminal identification signal of the calling terminal may be obtained from the wireless base station 9 via the mobile unit 8 and, in this example, the private branch exchange 60. it can.

In any case, the controller 59 analyzes the notifications from the network control devices 54-1 to 54-3, controls the switches 53-1 and 53-2, and outputs information for selecting a terminal to the center frequency. A is output to the multiplier 57-2. The multiplier 57-2 multiplies the signal by the unmodulated carrier signal of the center frequency B from the oscillator 56. The multiplied signal has a signal component whose center frequency is A + B and A−B.
And the signal components of A and B are removed by the high-pass filter 55-2. The signal of the remaining center frequency A + B, together with the signal from the network controller,
It is sent to the two-wire type transmission line 6 via the two-wire / four-wire converter 51.

FIG. 6 is a diagram showing an operation sequence example.
An example is shown in which a terminal of a general telephone network makes a call and calls a facsimile device of a mobile station. In the general telephone network, it is not necessary to distinguish whether the terminal is a telephone terminal or a non-telephone terminal, and the terminal type of the calling side cannot be known. Therefore, in this case, the terminal identification signal is transmitted from the called terminal.

That is, when the communication line between the terminal of the general telephone network and the mobile device is set up through the exchange and the radio base station, the mobile device issues a ring tone transmission command to the mobile device. Send out. This command is relayed from the mobile device to the terminal device, and the terminal device sends a ring tone to the corresponding terminal. Up to this point, the telephone mode is used.

The facsimile apparatus which has detected the ring tone is manually or automatically activated and goes into an off-hook state.
The terminal device detects the off-hook and switches the switch, and because the terminal is a facsimile device, the terminal device identifying signal indicating that the terminal is a facsimile device to the mobile device is a frequency used in the facsimile. Transmit using a frequency other than the band. The mobile device detects that it is in the FAX mode from the terminal identification signal, and switches the in-device switch. As a result, the mobile device also knows that it is in the FAX mode, notifies the wireless base station of the FAX mode by using the control field of the communication line, and switches the internal codec and the FAX interface. The radio base station detects the FAX mode from the notification from the mobile device,
Switch to AX interface. The radio base station further notifies the mobile device of the completion of switching using the control field.

FIG. 7 is a diagram showing another example of the operation sequence, showing an example in which a facsimile machine of one mobile station calls a facsimile machine of another mobile station.

The setting of the communication line between the calling side mobile device and the called side mobile device is completed via the calling side wireless base station, the switching center and the called side wireless base station, When the terminal on the calling side is activated, the terminal-side device on the calling side detects the off-hook of the facsimile device, switches the switch in the device, and uses the frequency other than the frequency band used for facsimile to identify the terminal identification signal. Is sent. The mobile device on the calling side detects the terminal identification signal from the terminal device and switches the switch in the device. The calling side mobile device switches between the codec and the fax interface based on the fact that the facsimile device has been activated and uses the control field to notify the radio base station that the call connection is in the fax mode. . The radio base station on the calling side learns from the notification from the mobile device that it is in the FAX mode, switches the codec and the FAX interface, and
Notify the mobile device on the calling side that switching is complete.

Upon detection of the FAX mode, the called-side radio base station notifies the called-side mobile device of the FAX mode, and switches between the codec and the FAX interface. The mobile device on the called side detects that it is in the FAX mode, sends a ring tone transmission command to the device on the mobile device side, switches the codec and the FAX interface, and completes the switching to the radio base station on the called side. Notice. When the destination mobile device detects the FAX mode, it switches the switch in the device and sends a terminal identification signal using a frequency outside the frequency band used in the facsimile. When the terminal device on the called side detects the FAX mode, it switches the switch in the device and sends a ring tone to the facsimile device on the called side.

FIG. 8 is a diagram showing an example of use of the present invention, showing an example of use in a ship telephone.

In this example, a private branch exchange 82 is connected to the digital mobile unit 81, and telephones 83-1 and 83-2 and a mobile unit side device 84 are connected to the private branch exchange 82. A terminal device 86 is connected to the mobile device 84 via a two-wire transmission path 85, and a telephone 87, a facsimile device 88 and a personal computer 89 are connected to the terminal device 86.

In the conventional analog type ship telephone, a plurality of terminals are connected to the network control device by a two-wire telephone interface and are switched by the network control device to be connected to the mobile device. However, this does not allow the mobile device to identify which terminal went off-hook. Although it is possible to identify the terminal type by the conventional method if a new control line is laid, it is necessary to lay a new transmission line when the two-wire type transmission line is embedded in the wall surface of a ship. Is often difficult and can require enormous expense and time.

Therefore, the two devices constituting the terminal identification device of the present invention are connected to both ends of the existing two-wire transmission line. This makes it possible to easily change the equipment to the digital system.

[0042]

As described above, the terminal identification device and the digital mobile communication device of the present invention connect a mobile station connected via a two-wire transmission line to a plurality of terminals, and yet the mobile station You can know the type of terminal with. INDUSTRIAL APPLICABILITY The present invention is effective in digitizing a conventional analog type mobile telephone, particularly a marine telephone, which uses a two-wire transmission line.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a configuration example of a mobile device.

FIG. 3 is a block diagram showing a configuration example of a wireless base station.

FIG. 4 is a block diagram showing a configuration example of a terminal device.

FIG. 5 is a block diagram showing a configuration example of a mobile device side device.

FIG. 6 is a diagram showing an example of an operation sequence.

FIG. 7 is a diagram showing an operation sequence example.

FIG. 8 is a diagram showing an example in which the present invention is applied to a ship telephone.

[Explanation of symbols]

1, 11, 83-1, 83-2, 87 Telephone 2, 12, 88 Facsimile device 3, 13, 89 Personal computer 4 Terminal identification device 5, 86 Terminal device 6, 85 Two-wire transmission line 7, 84 Move Machine side device 8 Mobile device 9 Radio base station 10 General telephone switching network 21, 33 High efficiency voice codec 22, 23, 34, 35 Non-telephone interface 24, 32 Interface switch 25, 31 Transceiver 36 Line switch 41-1 -41-3 Subscriber line interface circuit 42-1, 42-2, 53-1, 53-2 switch 43-1, 43-2, 49, 52-1, 52-2, 58
Low-pass filter 44,51 Two-wire / four-wire converter 45,59 Controller 46,56 Oscillator 47-1,47-2,57-1,57-2 Multiplier 48-1,48-2,55-1,55- 2 High-pass filter 54-1 to 54-3 Network control device 60, 82 Private branch exchange 81 Digital mobile device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Hagiwara 2-10-1 Toranomon, Minato-ku, Tokyo NTT Mobile Communications Network Co., Ltd.

Claims (4)

[Claims] 1. A high-efficiency voice codec and non-telephone signal relay depending on the type of terminal to which the call-connected terminal is a telephone terminal for voice communication or a non-telephone terminal that generates a non-telephone signal other than voice. A first device connected to a transmission device that switches an interface circuit to perform signal transmission; and a first device that is connected to the first device via a two-wire transmission line and that accommodates one or more telephone terminals and non-telephone terminals. The second device is provided with two devices, and the second device is a call detection means for detecting a call of the accommodated terminal, a connection means for connecting the call terminal to the first device, and a terminal of the call terminal. The notification device includes a notification unit that notifies the first device of a type by a frequency that is not used by either a telephone terminal or a non-telephone terminal, and the first device includes a notification detection unit that detects a notification by the frequency, and I made a notification Terminal identification device and a connection control means for connecting between the transmission apparatus Te. 2. The first device detects an incoming call to the connection control means and connects the incoming call to the second device, and information for selecting a terminal from a telephone terminal. Including a terminal selection notifying means for notifying the second device by a frequency not used in any of the telephone terminal, the second device, a terminal selection notification detecting means for detecting a notification from the terminal selection notifying means, 2. The terminal identification device according to claim 1, further comprising a called terminal selecting means for selecting a called terminal according to the detection output of the terminal selection notification detecting means. 3. The incoming call notification means for notifying the first device of the terminal type when the called terminal is off-hook by a frequency that is not used by either a telephone terminal or a non-telephone terminal. The terminal identification device according to claim 2, further comprising: 4. A mobile terminal, to which a telephone terminal for voice communication and a non-telephone terminal that generates a non-telephone signal other than voice are connected, and a wireless base station to which the mobile terminal is wirelessly connected. The mobile device and the radio base station include a high-efficiency voice codec for voice communication, a non-telephone signal relay interface circuit for transmitting a non-telephone signal, the high-efficiency voice codec and the non-telephone signal relay interface. Each of the mobile devices includes switching means for switching between a circuit and a circuit, and the mobile device includes means for identifying whether the calling terminal is a telephone terminal or a non-telephone terminal, and wireless notification means for notifying the wireless base station of the identification result. Wherein the radio base station is a digital mobile communication device including means for controlling a switching means of the mobile station according to a notification from the mobile equipment, wherein the mobile equipment and the terminal are connected to each other. To a digital mobile communication apparatus characterized by being connected through the terminal identification device according to any one of 3.