JPH0993230A - Two-way simultaneous communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct 2-way simultaneous communication by utilizing a forward channel control information part and a forward channel information part not used by a receiver side according to the ARQ transmission protocol. SOLUTION: Terminal equipments A, B each provided with a line control section 4 conducting mobile communication and a communication control section 2 having a transmission control section 3 executing transmission processing, a reception processing section 4 executing reception processing, and a simultaneous communication control section 5 controlling and managing the simultaneous communication of transmission reception are provided. The terminal equipments A, B confirm whether or not they have a function for simultaneous communication according to the ARQ and when both the terminal equipments A, B confirm that they are a function for simultaneous communication, valid information to both the terminal equipments A, B is set to a forward channel control information part 120 and a forward channel information part 130 of a frame 100 of the ARQ outputted from both the terminal equipments A, B.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an automatic repeat request (Aut
The present invention relates to a two-way simultaneous communication device using an omatic repeat request (hereinafter, simply referred to as "ARQ"). For example, two-way simultaneous communication using ARQ used as a facsimile device connected to a digital mobile phone is performed. It can be used as a device, for example, a storage device is set in a relay station by PHS or the like, and can also be used as a device that performs bidirectional simultaneous communication when communicating facsimile signals.

[0002]

2. Description of the Related Art As a typical example of communication using ARQ,
There is a facsimile machine using a digital mobile phone. Facsimile communication procedure information and facsimile image information are
It is written in the ARQ frame and transmitted.

FIG. 4 is an explanatory view for explaining a conventional ARQ frame structure.

As the ARQ frame 100, for example,
Information to be transmitted such as a facsimile image to be transmitted is put in the forward channel information section 130, and its management information is written in the forward channel control information section 120. In addition, ACK and NACK signals are sent to the backward channel control information section 110 as confirmation signals of the received information. A CRC 140 for checking the frame 100 is attached to the end. It should be noted that this type of ARQ frame structure is well known in digital car telephone systems.

[0005]

As described above, in the facsimile communication using the conventional digital portable telephone, during the facsimile image transmission, the transmitting side sends the image information to the forward channel information section 130 and the management information thereof to the forward channel control. The information is sent in the information section 120, and the receiving side puts ACK and NACK signals, which are confirmation signals, in the backward channel control information section 110 and returns it to the transmitting side.
However, the number of bits of this ARQ frame 100 is always fixed (224 bits), and dummy data is transmitted to the forward channel control information section 120 and the forward channel information section 130 as unused data. This operation will be described in detail with reference to FIG.

FIG. 5 is an explanatory view for schematically explaining the transmission and reception of a conventional ARQ frame.

A case where a facsimile image is transmitted from the terminal A to the terminal B in an ARQ frame will be described.

In FIG. 5, as an ARQ frame, a backward channel control information unit 1 necessary for simplification.
It is expressed as a backward BC including 10 and a forward FO including a forward channel control information unit 120 and a forward channel information unit 130. In the figure, the part described as "unknown" indicates that the backward BC or the forward FO is unused or used but does not contain valid information.

First, when the line connection is completed, the terminal B transmits that it is a facsimile machine by CED which is a procedure signal, and the terminal A side transmits an ACK signal in response thereto. Next, the terminal B sends the procedure signal D indicating its own capability.
After the IS is transmitted, the terminal A side transmits an ACK in response thereto and a DCS of a procedure signal for transmitting the finally determined communication capability, and after confirming the terminal capability and determining the communication capability. , ACK is transmitted from the terminal B to the terminal A, and this is confirmed.

After confirmation of the terminal capability and determination of the capability on this communication by exchanging DIS and DCS in the previous procedure, transmission of a 192-bit facsimile image from the terminal A to the terminal B starts. Here, every time a 192-bit facsimile image is transmitted, the terminal B returns an ACK or NACK confirmation signal to the terminal A, but the forward FO does not contain valid information.

The end of page information of a 192-bit facsimile image is sent from terminal A to terminal B by a PIX end signal.
ACK is sent from terminal B to terminal A,
Further, the end of the facsimile image is sent from the terminal A to the terminal B by E.
When transmitted by OP, ACK is transmitted from terminal B to terminal A, DCN for disconnecting the line is transmitted from terminal A to terminal B, ACK is transmitted from terminal B to terminal A, and at the same time,
Terminal B disconnects the line.

During this time, when the ACK is transmitted from the terminal B to the terminal A, the forward FO including the forward channel control information section 120 and the forward channel information section 130 does not contain valid information.

FIG. 6 shows an ARQ in which the conventional transmission right is exchanged.
FIG. 3 is an explanatory diagram schematically illustrating transmission / reception of the frame.

Here, a case will be described in which there is a facsimile image which is polled from the terminal A to the terminal B by the ARQ frame method and is transmitted to the destination terminal B by polling.

Similarly to FIG. 5, after unilaterally transmitting a facsimile image from the terminal A to the terminal B, the terminal A transmits a DTC inquiring whether or not the facsimile image exists to the terminal B,
The presence of the facsimile image is transmitted from the terminal B to the terminal A by DCS, and the terminal A confirms it. That is, the transmission right is reversed, the capability is confirmed, and the capability for this communication is determined, and the facsimile image is transmitted from the terminal B to the terminal A. Then, when the end of the page information of the 192-bit facsimile image is transmitted from the terminal B to the terminal A by PIX termination, ACK is transmitted from the terminal A to the terminal B, and further, the termination of the facsimile image is transmitted from the terminal B to the terminal A by EOP. ACK is sent from terminal A to terminal B,
DCN for disconnecting the line is transmitted from terminal B to terminal A, ACK is transmitted from terminal A to terminal B, and at the same time, terminal A disconnects the line.

That is, even when there is a facsimile image to be polled from the terminal A to the terminal B by the ARQ frame method and to be transmitted to the destination terminal B by polling, the facsimile image is required from the terminal A to the terminal B. A number of ARQ frames are transmitted, and the terminal B to the terminal A
Even if there is a facsimile image to be transmitted from the terminal B to the terminal A in the ACK returned to the terminal A, it is not possible to alternately communicate the facsimile image from both terminals A and B at the same time. It was impossible.

Therefore, an object of the present invention is to provide a bidirectional simultaneous communication device capable of performing bidirectional communication by simultaneously transmitting and receiving an ARQ frame to improve communication efficiency.

[0018]

A two-way simultaneous communication apparatus according to claim 1 is a two-way simultaneous communication apparatus that performs simultaneous communication between terminals according to an automatic retransmission request, and both terminals have a simultaneous communication function. At this time, bidirectional communication is performed by inserting valid information into both terminals in the forward channel control information section and the forward channel information section of the frame of the automatic retransmission request output from both terminals.

A two-way simultaneous communication apparatus according to claim 2 is
A line control unit for performing communication, a transmission control unit for performing transmission processing, a reception processing unit for performing reception processing, and a communication control unit having a simultaneous communication control unit for controlling and managing simultaneous communication of transmission and reception. Check whether each terminal has a function for simultaneous communication according to the automatic resend request,
When it is confirmed that both terminals have the simultaneous communication function, the forward channel control information section and the forward channel information section of the frame of the automatic retransmission request output from both terminals,
Both terminals are provided with valid information for bidirectional communication, and the line is disconnected when the end of the bidirectional communication is confirmed.

A bidirectional simultaneous communication apparatus according to claim 3 is
The line control unit is a digital mobile phone, and transmitted / received information is an image.

[0021]

1 is a schematic block diagram of a terminal as an embodiment of a two-way simultaneous communication apparatus of the present invention.

In FIG. 1, a line control unit 1 controls a line connected to a partner (not shown) via electromagnetic waves. The communication control unit 2 realizes non-telephone communication, and has a communication function for realizing facsimile communication and data communication, for example. The communication control unit 2 further includes a transmission control unit 3 that executes a transmission process, a reception processing unit 4 that executes a reception process, and a simultaneous communication control unit 5 that controls and manages simultaneous communication of transmission and reception. . These configure the terminal A and the terminal B in the present embodiment.

Here, the line control unit 1 is a digital mobile phone that realizes digital mobile communication, a PHS, an analog mobile phone or a wireless communication device that realizes analog mobile communication,
Furthermore, a device having a line connection function such as a wired digital communication device or an analog communication device can be used. Also,
The information to be simultaneously communicated here may be binary information such as a facsimile signal, color image, image information such as video, data information such as text data and binary data, voice information and the like.

FIG. 2 shows a digital mobile phone as a line control unit in an embodiment of the two-way simultaneous communication apparatus of the present invention.
FIG. 3 is a circuit configuration diagram of a portable facsimile capable of bidirectional simultaneous communication of a facsimile image as information.

Next, as an application example of the two-way simultaneous communication apparatus according to one embodiment of the present invention, a digital portable telephone as the line control unit 1 and a portable facsimile apparatus capable of two-way simultaneous communication for transmitting and receiving a facsimile image as information. The case where the terminal is used will be described.

In the figure, the line control unit 1 of FIG. 1 is composed of a digital mobile phone 10, and the communication control unit 2 of FIG. 1 is composed of a mobile facsimile device 20. The external interface unit 12 and the external interface unit 21 are mutually connected. Are connected with each other, and both form a terminal.

The wireless line control unit 11 controls a wireless line connected to the wireless line, the voice processing unit 13 performs voice processing for realizing a call, and the main control unit 14 performs main control of the digital portable telephone. The transmission control unit 22 controls the transmission of the portable facsimile device 20. The reception controller 23 controls the reception of the mobile facsimile device 20. The simultaneous communication control unit 24 controls and manages bidirectional simultaneous communication. The encoder / decoder 25 encodes and decodes a facsimile image. The memory unit 26 stores the facsimile image. The reading unit 27 reads an image to be encoded from a document. The recording unit 28 prints the image to be output. The main control unit 29 performs main control of the mobile facsimile 20.

FIG. 3 is an explanatory view for schematically explaining transmission / reception of ARQ frames in the two-way simultaneous communication apparatus of FIG.

First, the case where a facsimile image is transmitted and received between the terminal A and the terminal B in the ARQ frame system will be described.

In FIG. 3, AR in the present embodiment
The Q frame has a backward BC including necessary backward channel control information, and a forward FO including a forward channel control information unit 120 and a forward channel information unit 130. Note that here as well, the “not yet” shown
The portion described as is a portion in which the backward BC or the forward FO is unused or used but does not contain valid information. Further, here, “A.” or “B.” means a signal output from the terminal A or the terminal B.

First, when the line connection from the terminal A to the terminal B is completed, the terminal B transmits in step S1 that the terminal B has the facsimile function by B / CED, and in step S2 the terminal A side responds with an ACK. Send a signal. Next, in step S3, the terminal B transmits B.DIS, which is a procedure signal indicating its own capability including whether or not it has a function for performing simultaneous communication according to ARQ, and in step S4, the terminal A side responds to it. After transmitting ACK and the A / DCS of the procedure signal for transmitting the finally determined communication capability, confirming the capability of the terminals and determining the capability on this communication in step S5, the terminal B transmits By sending ACK to terminal A, the ability to send from terminal A to terminal B is determined.

Further, in step S6, the terminal A transmits a procedure signal A / DIS indicating its own capability including whether or not it has a function for performing simultaneous communication according to ARQ, and in step S7, the terminal B side sends it. B. DCS of procedural signal for transmitting ACK to respond and finally determined communication capability
To confirm the terminal capability during bidirectional communication and determine the capability.

During this period, the backward BC and the forward FO are unused or used but do not contain valid information except for steps S4 and S7.

However, after confirming the terminal capability in the two-way communication and determining the capability, the terminal B transmits the ACK to the terminal B by transmitting ACK from the terminal A to the terminal B in step S8. The ability is fixed. At the same time, at this time, the facsimile image is transmitted by the forward FO from the terminal A, and the ACK for the reception of the facsimile image from the terminal A is set as the backward BC and the terminal B is transmitted in step S9.
Of the facsimile image of the terminal A in the forward FO
Send to In step S10, the ACK for the reception of the facsimile image from the terminal B is described in the backward BC, and the facsimile image of the terminal A is described in the forward FO and transmitted to the terminal B. Further, in step S11, ACK for receipt of the facsimile image from the terminal A is described in the backward BC, the facsimile image of the terminal B is described in the forward FO, and is transmitted to the terminal A. Thereafter, this procedure is repeated alternately.

Then, the terminal B transmits the ARQ frame transmitted from the terminal A to the terminal B in step S21.
End of page information of facsimile image with CK
When the PIX end signal is received, the terminal B is sent in step S22.
Sends ACK to terminal A, and A / PIX from terminal A
ACK for receipt of the end signal in backward BC,
The facsimile image of the terminal B is described in the forward FO and transmitted to the terminal A, and the transmission of the facsimile image from the terminal B is continued. AC from terminal A to terminal B in step S23
K to send the end of the facsimile image from terminal A to A
When transmitting by the EOP signal, ACK is transmitted from the terminal B to the terminal A in step S24, and at the same time, the transmission of the facsimile image is continued. In step S25, terminal A transmits ACK to terminal B, and at the same time disconnects the line A.
-Send a DCN signal. However, since there is a facsimile image to be transmitted on the terminal B side, A.DCN
Even if the signal is received, the line between the terminal A and the terminal B is not disconnected so that the facsimile image is continuously transmitted. In step S26, the ACK upon receiving the A.DCN signal is transmitted from the terminal B to the terminal A, and at the same time, the transmission of the facsimile image is continued. In step S27, the forward FO is unused from terminal A to terminal B, and the AC for facsimile image reception is received.
Only send K.

Further, when there is no facsimile image to be transmitted to the terminal B side, the terminal B is sent in step S28.
In response to the ARQ frame transmitted from the terminal A to the terminal A, the terminal B transmits a B.PIX end signal indicating the end of the page information of the facsimile image together with ACK. In step S29, ACK is transmitted from terminal A to terminal B, and B from terminal B
Backward B ACK for reception of PIX end signal
Described in C and transmitted to terminal B. When ACK is transmitted from the terminal B to the terminal A in step S30 and the end of the facsimile image from the terminal A is transmitted by the B / EOP signal,
ACK is transmitted from terminal A to terminal B in step S31, and ACK is transmitted from terminal B to terminal A in step S32, and at the same time, a B / DCN signal for disconnecting the line is transmitted. At this time, A / DCN disconnects the line from the terminal A side
Since the signal is output, when the B / DCN signal is received, in order to disconnect the line between terminal A and terminal B, ACK is transmitted from terminal A to terminal B in step S33 to disconnect the line.

As described above, in the two-way facsimile communication using the two-way simultaneous communication apparatus of the present embodiment, first, like a normal digital mobile phone, a wireless line is connected to enable a call, and Further, the line is switched to a state in which the facsimile communication is possible by the non-telephone service request (facsimile communication service request) from the portable facsimile. These procedures are as described in the standard (RCR STD-27B: Digital Car Telephone System).

Next, simultaneous mutual communication is realized by the facsimile procedure according to FIG. That is, as a normal facsimile procedure, the called side sends a CED signal indicating that it is a facsimile to the calling side, and a DIS signal indicating the ability of the called side is sent to the calling side. Determine ability. Further, before this procedure, the confirmation of the function of the two-way facsimile communication in this embodiment is performed. Here, the A / DI function that performs the same function as the DIS is performed.
S, B, DIS, and A, D that perform the same function as DCS
It is done by CS, B and DCS. The confirmation function is not limited to this as long as it has a capability presentation function of the terminal A and a capability determination function in communication at that time.

When it is confirmed that the mutual terminals have the function of the bidirectional simultaneous communication device, the facsimile image is transmitted from the terminal A as in the ordinary facsimile communication, and the terminal B is originally not used. The existing forward channel information section 130 contains the facsimile image, and the forward channel control information section 120 contains the management information and is transmitted. When the image transmission is completed, communication is completed by A / EOP and A / DCN as a post-procedure from the terminal A to the terminal B, and B / EOP and B / D as a post-procedure from the terminal B to the terminal A.
Terminate communication at the CN. (Here, A ・ EOP, B ・ E
OP is a signal that performs the same function as EOP, A / DCN,
B-DCN is a signal that performs the same function as DCN, but the function of confirming the end of communication is not limited to these signals, and the procedure from terminal A to terminal B or terminal B to terminal A is performed. The same process as can be performed.

Generally, the transmission time from the terminal A to the terminal B is different from the transmission time from the terminal B to the terminal A, and the simultaneous communication control unit 5 can It monitors the termination of the other communication and has the function of maintaining the line.

Further, it can be used for a portable information terminal or the like having a facsimile function without the recording unit 28 and the reading unit 27.

As described above, in the two-way simultaneous communication apparatus of this embodiment, both terminals A and B have the simultaneous communication function in the two-way simultaneous communication apparatus in which the terminals A and B perform simultaneous communication according to ARQ. Both terminals A and B
Forward channel control information section 120 and forward channel information section 1 of ARQ frame 100 output from
In the terminal 30, valid information is put in both terminals A and B to perform bidirectional communication.

Therefore, the information output from both terminals A and B communicating in the ARQ frame 100 can be bidirectionally communicated each time the ARQ frame 100 is transmitted and received.
There is less waste than in the case where one communication is ended and the other communication is started as in the conventional case, and communication efficiency can be improved by increasing the communication density. In addition, the two-way simultaneous communication device includes a digital mobile phone that realizes digital mobile communication, a PHS, an analog mobile phone that realizes analog mobile communication, a wireless communication device, a wired digital communication device, an analog communication device, and the like. It can be used for devices with line connection function. In addition, the information that is simultaneously communicated here may be monochrome information such as a facsimile signal, image information such as a color image and video, data information such as text data and binary data, and voice information.

Further, in the two-way simultaneous communication apparatus of this embodiment, the line control unit 1 for mobile communication, the transmission control unit 3 for executing the transmission process, the reception processing unit 4 for executing the reception process, and the transmission / reception In terminals A and B having a communication control unit 2 having a simultaneous communication control unit 5 for controlling and managing the simultaneous communication, simultaneous communication is performed between the terminals A and B according to ARQ in steps S3 and S6. If it is confirmed that both terminals A and B have the simultaneous communication function, the forward channel control information section 120 and the forward channel control information section 120 of the ARQ frame 100 output from both terminals A and B are confirmed. Channel information section 130
In the two terminals A and B, valid information is put into both terminals for bidirectional communication, and the end of the bidirectional communication is terminated in step S and step S2
3 and the line is disconnected when confirmed in step S30.

Therefore, the information output from both terminals A and B communicating in the ARQ frame 100 can be bidirectionally communicated each time the ARQ frame 100 is transmitted and received.
There is less waste than in the case where one communication is ended and the other communication is started as in the conventional case, and communication efficiency can be improved by increasing the communication density. In addition, the two-way simultaneous communication device includes a digital mobile phone that realizes digital mobile communication, a PHS, an analog mobile phone that realizes analog mobile communication, a wireless communication device, a wired digital communication device, an analog communication device, and the like. It can be used for devices with line connection function. In addition, the information that is simultaneously communicated here may be monochrome information such as a facsimile signal, image information such as a color image and video, data information such as text data and binary data, and voice information.

In the two-way simultaneous communication device of this embodiment, the line control unit 1 includes the digital portable telephone 10
Since the information to be transmitted / received is an image, the time required for the transmission / reception of an image having a large amount of information can be shortened.

[0047]

As described above, in the two-way simultaneous communication device according to the first aspect, when both terminals have the simultaneous communication function when performing the simultaneous communication between the terminals according to the automatic retransmission request, Two-way communication is performed by inserting valid information into both terminals in the forward channel control information section and the forward channel information section of the frame of the automatic retransmission request output from the terminals.

Therefore, the information output from both terminals communicating in the ARQ frame can be bidirectionally communicated each time the ARQ frames are mutually transmitted and received. As compared with the case where the communication is started, waste is eliminated, and the communication efficiency can be improved by increasing the communication density. Therefore, it is possible to effectively use the forward channel control information part and the forward channel information part in which the ARQ frame is empty, and as a result, it is possible to realize bidirectional simultaneous communication, reduce communication cost, and reduce communication time. Can be shortened.

According to another aspect of the bidirectional simultaneous communication apparatus of the present invention, a line control unit for performing communication, a transmission control unit for performing transmission processing, a reception processing unit for performing reception processing, and simultaneous transmission / reception communication control and management. It is confirmed whether or not the terminals having the simultaneous communication control section for simultaneous communication have a function for simultaneous communication in accordance with the automatic retransmission request, and that both terminals have the simultaneous communication function. When confirmed, put valid information in both terminals in the forward channel control information section and the forward channel information section of the frame of the automatic retransmission request output from both terminals, and perform bidirectional communication, and confirm the end of the bidirectional communication. The line is disconnected when you do.

Therefore, the information output from both terminals communicating in the ARQ frame can be bidirectionally communicated each time the ARQ frames are transmitted / received to each other. As compared with the case where the communication is started, waste is eliminated, and the communication efficiency can be improved by increasing the communication density. Therefore, it is possible to effectively use the forward channel control information part and the forward channel information part in which the ARQ frame is empty, and as a result, it is possible to realize bidirectional simultaneous communication, reduce communication cost, and reduce communication time. Can be shortened.

In the two-way simultaneous communication device of claim 3, since the line control section is a digital mobile phone and the information to be transmitted and received is an image, the effect of claim 2 and a large amount of information are provided. In transmitting / receiving an image, the time required for the transmission / reception can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a terminal as an embodiment of a two-way simultaneous communication device of the present invention.

FIG. 2 is a circuit configuration diagram of a digital facsimile as a line control unit and a portable facsimile capable of two-way simultaneous communication of a facsimile image as information in an embodiment of the two-way simultaneous communication apparatus of the present invention.

FIG. 3 is a diagram of A in the two-way simultaneous communication device of FIG.
It is explanatory drawing which outlines transmission / reception of the frame of RQ.

FIG. 4 is an explanatory diagram illustrating a frame structure of conventional ARQ.

FIG. 5 is an explanatory diagram for schematically explaining transmission and reception of a conventional ARQ frame.

FIG. 6 is an explanatory diagram for schematically explaining transmission / reception of an ARQ frame in which a transmission right is exchanged in the related art.

[Explanation of symbols]

 1 line control unit 2 communication control unit 3 transmission control unit 4 reception control unit 5 simultaneous communication control unit 10 digital mobile phone 20 portable facsimile

Claims (3)

[Claims] 1. A bidirectional simultaneous communication device that performs simultaneous communication between terminals according to an automatic retransmission request, and when both terminals have a simultaneous communication function, forward channel control of a frame of an automatic retransmission request output from both terminals. A two-way simultaneous communication device, characterized in that effective information is put in both terminals in an information section and a forward channel information section for two-way communication. 2. A communication control having a line control unit for performing communication, a transmission control unit for executing transmission processing, a reception processing unit for executing reception processing, and a simultaneous communication control unit for controlling and managing simultaneous communication of transmission and reception. In a terminal comprising a unit, it is confirmed whether or not the terminals have a function for performing simultaneous communication in accordance with an automatic retransmission request, and when it is confirmed that both terminals have a simultaneous communication function, both terminals The valid channel information and the forward channel information section of the frame of the automatic resend request output from the two-way communication are put into the two-way communication, and the line is disconnected when the end of the two-way communication is confirmed. A bidirectional simultaneous communication device characterized by the above. 3. The two-way simultaneous communication device according to claim 2, wherein the line control unit is a digital mobile phone, and information to be transmitted and received is an image.