JPH02194740A - Relaying system for non-telephonic signal - Google Patents

Abstract

PURPOSE:To relay a non-telephonic signal between a radio base station and a mobile station without giving a function judging non-telephone service and the kind of a terminal to the radio base station by executing judgement in the mobile station and selection-controlling an interface function for relaying non-telephonic service concerned. CONSTITUTION:The radio base station 1 and the mobile station have not only telephone interface circuits 21-1 to 21-n incorporating a CODEC but also the various interface circuits for relaying non-telephonic signal 21-1 to 21-n of FAX, a captain and the like, and the moving station judges non-telephonic service and the kind of the terminal. The interface circuits for relaying non-telephone signal 22-1 to 22-n concerned in the insertion-control of a telephone CODEC is selection-controlled between the radio base station 1 and the mobile station by an indication from the mobile station by using a control field installed in a communication line in the case of the transmission of the base station, the termination of the mobile station and in an opposite case. Thus, the non-telephonic signal of a general telephone network can be relayed to a narrow band radio line by using highly efficient CODEC without giving the function for judging the kind of service and the kind of the terminal to the radio base station 1.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention uses a high-efficiency codec,
In the narrowband data mobile communication system that constitutes the low bit rate Dinotal wireless line of 8 kb/s 4, various non-telephone services are provided between the non-telephone terminal of the mobile station and the non-telephone terminal of the general telephone network, similar to telephone services. The present invention relates to a non-telephone signal relay method for providing telephone services.

[Conventional technology]

In the conventional mobile communication system with an analog radio line configuration, the service is basically possible because the radio base station or mobile station is not aware of the telephone and non-telephone networks of the general telephone network, or the type of non-telephone communication. Met.

However, as the efficiency of relaying non-telephone signals from the general telephone network to the wireless line of the narrowband Dinotal mobile communication system, which aims to effectively utilize frequencies by lowering the transmission bit rate using high-efficiency codecs, becomes more efficient. , it became difficult and impossible to reproduce and relay the codec's non-telephone modem signals (non-telephone signals).

In the case of a 16 kb/s codec, depending on the codec's algorithm, it may be possible to achieve 240
Non-telephone signals of around 0 b/s can be relayed, but with communication systems that use a more efficient 8 kb/s codec, it is not possible to reproduce or relay non-telephone signals only by reproducing and relaying audio signals. there were.

As a countermeasure for this, (1) For example, 64kb/
Mobile communication is a method that uses a high-efficiency codec for telephone calls and shares 64 kb/s with multiple telephones, and communicates 64 kb/s independently for non-telephone calls, such as the method used on leased lines of S. (2) Have the switching center of the general telephone network notify the wireless base station of the type of non-telephone service, control the insertion and removal of the codec, and select the applicable non-telephone interface; A possible method is to relay non-telephone signals to the Dinotal wireless line by switching.

However, when applying method (1) to mobile communication, 6
4kb/s high-speed Dinotal wireless line is required, which increases the size of the mobile station, making it economically unviable; and (2)
This method is currently not possible as switching centers in general telephone networks do not have the ability to determine the type of service being communicated.

Note that there is no example in which a wireless communication line with a low bit rate of 8 kb/s or less is shared for relaying voice signals and relaying non-telephone signals.

[Problem to be solved by the invention]

The present invention eliminates the need for a wireless base station to have a function to determine non-telephone services and terminal types, and allows the mobile station to determine all of these and control the selection of the corresponding non-telephone service relay interface function. It enables the transmission and reception of non-telephone signals between wireless base stations and mobile stations by controlling the insertion and removal of codecs on low-speed bit rate (narrowband) Dinotal wireless lines where signal reproduction and relay is impossible. .

That is, the present invention provides codec insertion/removal control and non-telephone signal relay interface circuit for relaying non-telephone signals on a general telephone line to mobile radio communication configured with a narrowband digital radio line using a high-efficiency codec. The purpose of this study is to clarify the selection method of the wireless base station and to enable the relay of non-telephone signals between the wireless base station and the mobile station.

[Means to solve the problem]

According to the invention, the above objects are achieved by the means specified in the claims.

That is, the present invention provides a mobile communication system in which a wireless base station and a mobile station have voice signal and various non-telephone signal relay interface functions, and the communication wireless line is a narrowband digital wireless line using a high-efficiency voice codec. In this method, a communication radio line is provided with a field for transmitting information such as voice signals and a control field for relay control of non-telephone terminals, etc. The mobile station detects a non-telephone terminal or service type, and the control field allows the mobile station to transmit radio signals. Non-telephone signal relay that notifies the base station, controls the insertion and removal of the audio codec at the wireless base station and mobile station within the timing of the non-telephone terminal, selects the corresponding non-telephone signal interface, and relays the non-telephone signal. It is a method.

[Made by Po]

In the present invention, in addition to a telephone interface circuit including a codec, a wireless base station and a mobile station have an interface circuit for relaying non-telephone signals such as FAX and captain tube.
The mobile station determines the type of non-telephone service and terminal, and uses the control IllI field provided in the communication line to send calls to the base station, receive calls to the mobile station, and vice versa. The selection control of the corresponding non-telephone signal relay interface circuit is performed between the radio base station and the mobile station by the insertion/removal control, and non-telephone signals are relayed.

According to the present invention, it is possible to relay non-telephone signals from a general telephone network to a narrowband wireless line using a high-efficiency codec without requiring a wireless base station to have a function for determining service types and terminal types. Contributes to downsizing and economicalization.

It is also possible to change the service type by notifying the service type from the mobile station in the communication state using a control field within the communication line.

〔Example〕

FIG. 1 is a diagram showing an example of the configuration of a relay system implementing the present invention, in which (a) shows the system configuration on the fixed station side, (b) shows the wireless line configuration, and (c) shows the configuration of the mobile station. The structure of the station is shown: 1 is a wireless base station, 2-1 to 2-0 are mobile stations, 3 is a switching center, 4 is a general telephone network telephone, and 5-1 to 5-n are general telephone network telephones. A non-telephone terminal, 6 is a control radio line, 7 is a group of communication radio lines, 8 is a general telephone network that connects the radio base station 1 and the switching center 3, and 9 is a link between the switching center 3, the telephone W14, and the non-telephone terminal 5. General telephone network, 25 is a control unit, 26 is an antenna duplexer,
27 represents an antenna.

In the figure, the mobile station includes a transceiver 10, a line switch 1
1. Telephone interface 12. Non-telephone ink 7.
3. Control unit 14, telephone terminal 15, non-telephone terminal 16-1~
It consists of a 16-n uplink antenna 17, and in the case of a mobile station call, when dialing from the telephone terminal 15 with OFF 7, the line is switched! Off-hook information is relayed to the control unit 14 in s11. A calling signal to which a mobile station ID number is added is generated using control voice, and is transmitted from the transceiver 10 to the radio base station 1 via the control radio line 6 and the control radio line transceiver 18.

In the m#i base station, the controller 611M525 selects an empty communication radio line from the communication radio line group 7 and uses the control radio diagram #
At step 16, the mobile station is notified and the transmitter of the designated communication wireless line transceiver (any one of 19-1 to 19-n) is activated.

The mobile station (for example, 2-1) switches the transceiver 10 to the designated communication wireless line, and! ! & transmits radio waves to the base station. After completing the settings for the designated communication wireless line at the wireless base station, the telephone interface (including the corresponding codec) will be installed.
21-1 to 21-n) is connected to the general telephone network 8j3 between the exchange 3 and the wireless base station 1 via the line switch 20, and the exchange 3 and the general 'rIIi talk #! 9's telephone 4, the setting of the connection fiL and communication line is completed.

If the non-telephone on the general telephone network is a FAX terminal and is in automatic mode,
Detects RGT and switches from telephone mode to FAX mode.

Meanwhile, at the mobile station, after confirming that the communication line settings are complete, the FA
When the Xa communication button is pressed, the line switch 11 detects the FAX mode, selects the FAX interface from the non-telephone interfaces 13-1 to 13-n, and selects the control unit 25 of the SM base station 1 and the corresponding switch in the control field within the communication line. Telephone ink 7 - Notify the club. The control unit 25 connects the non-telephone interfaces 22-1 to 22-0 to the FAX interface 7.
Select the option, disconnect the codec of the telephone interface 21, connect the FAX interface, and connect the mobile station 2.
A mobile station response signal is transmitted to the mobile station in the control field of the downlink communication line, and non-telephone signals are then relayed between the general telephone network and the mobile station.

A more detailed explanation will be given below using Section 2, FIGS. 3 and 4.

FIG. 2 is a diagram showing an example of a 7-frame configuration of a communication wireless line used in the non-telephone signal relay system according to the present invention, (a
) shows the frame H4 of the uplink communication line, and (b) shows the frame structure of the downlink. Frame 28 consists of a control $ field 29 and a data field 30. The control field 29 is composed of a control information section 31, an ID information section 32, etc.
Sends and receives control information for AX mode and other non-telephone modes.

Further, in the data field 30, audio information output from the codec is transmitted in the telephone mode, and a communication signal is transmitted in the FAX mode.

3 and 4 are diagrams for explaining the operation of the embodiment of the present invention, in which FIG. 3 shows the case where the mobile station originates and has not arrived at the general telephone network end, and FIG. 4 shows the case where the mobile station has not arrived at the general telephone network end. This shows the case where the call is sent and the mobile station is not reached.

In Figure 3, when the communication line settings are completed, an RGT is sent from the exchange to the destination terminal, and the general telephone network terminal changes from telephone mode to FA in manual or automatic mode.
The mode switches to X mode, and the fax uses CED signal (2100
Hz).

After completing the communication line settings, the mobile station turns on the FAX communication button depending on the manual mode or automatic mode on the general telephone network side. When the mobile station detects the FAX mode, it selects the mobile station's FAX interface and switches the control field of the communication line from the telephone mode to the non-telephone FAX mode.

The base station detects that the uplink control field is in FAX mode, disconnects the telephone interface including the codec, and selects and connects the FAX interface.

Next, when a CED signal from the general telephone network is detected, the mobile station is instructed to transmit the CED signal in the control field of the downlink communication line.

Thereafter, in accordance with the FAX protocol, the HDLC signal is relayed in the control field and the image signal is relayed in the data field.

FIG. 4 shows an example of originating from a fixed station and terminating at a mobile station.

The only difference from FIG. 3 is that the CED signal is sent from the FAX of the mobile station, and the other non-telephone signal relay control is the same.

In either case, the mobile station detects the FAX mode and sends jl!
By notifying the base station via the liM communication line, it becomes possible to relay the non-telephone signal to the narrowband digital radio line without the base station having to detect the non-telephone type of the general telephone network.

〔Effect of the invention〕

As explained above, the present invention provides a low bit rate digital radio line between a radio base station and a large number of mobile stations,
- In the differential mobile communication system that provides telephone and non-telephone services between telephone network subscribers and mobile stations, the 7 frames of the control radio line are used to transmit and receive control signals between the radio base station and the mobile station. A control field is provided, the terminal type is determined by the mobile station, the mobile station notifies the radio base station of the terminal type using the control field, and the radio base station determines the terminal type based on the instructions from the mobile station. Since the wireless base station adopts a method of switching and connecting the non-telephone terminals and non-telephone terminals, there is no need for the wireless base station to determine the type of non-telephone terminal connected to the fixed side, so the hardware can be simplified. Furthermore, since the type of non-telephone terminal is notified using a control field provided in the communication line, there are advantages such as the ability to change the type of terminal during communication.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a relay system implementing the present invention, FIG. 2 is a diagram showing an example of the frame configuration of a communication radio line used in the non-telephone signal relay system according to the present invention, and FIGS. Figure 4 is a diagram illustrating the operation of the embodiment of the present invention. 1... Wireless base station, 2...
・Mobile station, 3 ... Switching station, 4 ・
...Telephones on the general telephone network, 5-1 to 5
-n ・・・・・・Non-telephone terminal of general telephone network,
6 ... Control wireless line, 7 ・
・・・・・・Communication wireless line group, 8.9 ・・・・・・
General telephone network, 1o...transmitter/receiver,
11... Line disconnected? vessel, 12
...Telephone interface, 13-1~
13-n...Non-telephone interface, 14
...control section, 15 ...
・Telephone terminals, 16-1 to 16-n...
...Non-telephone terminal, 17 ...Antenna, 18 ...Control radio line transceiver,
19...Communication wireless line transceiver, 20
・・・・・・Line switching device, 21 ・・・・
・・Telephone interface, 22-1~2
2-n...Non-telephone interface, 24 ・
...Non-telephone protocol detector, 25 ...
・Control unit, 26...Antenna duplexer, antenna, frame, control field, data field, control information unit, ID information unit

Claims (1)

[Claims] Mobile communication in which a wireless base station and a mobile station have voice signal and various non-telephone signal relay interface functions, and the communication wireless line is a narrowband digital wireless line using a high-efficiency voice codec. In this method, a communication radio line is provided with a field for transmitting information such as voice signals and a control field for relay control of non-telephone terminals, etc. The mobile station detects a non-telephone terminal or service type, and the control field allows the mobile station to transmit wireless signals. Notify the base station, the wireless base station,
A non-telephone signal relay method characterized in that a mobile station performs insertion/removal control of a voice codec within the timing of a non-telephone terminal, selects a corresponding non-telephone signal interface, and relays the non-telephone signal.