JPH10257229A - Facsimile adapter device - Google Patents

Abstract

(57) [Problem] To provide a line between facsimile apparatuses in a wireless communication network when a deviation in data transfer time between facsimile apparatuses occurs. SOLUTION: A general-purpose G3 on a transmission side via a wireless communication network 13
A receiving G3 facsimile adapter device 15 for receiving data from the facsimile device 11 and transmitting the data to the receiving general G3 facsimile device 12, wherein the facsimile adapter device 15 is configured to receive data from the transmitting general G3 facsimile device 11. Receiving circuit 16 for receiving
And an absorption RAM buffer 17 for sequentially storing the data.
A communication control circuit 20 for transmitting the stored data to the general-purpose G3 facsimile apparatus 12 on the receiving side;
A control circuit 21 for controlling data transmission timing by the communication control circuit 20 so as to correspond to the G3 control procedure of the receiving general-purpose G3 facsimile apparatus 12 based on the data amount of the data stored in the buffer 17. is there.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting side for transmitting image data (facsimile image data encoded for facsimile) by a general-purpose G3 facsimile procedure via a communication satellite serving as a one-way communication path. General purpose G3
The present invention relates to a facsimile adapter device that receives image data from a facsimile device and transmits the image data to a receiving general-purpose G3 facsimile device that receives image data according to a general-purpose G3 facsimile procedure.

[0002]

2. Description of the Related Art In such a facsimile adapter device, a memory for storing image data (absorption R) is provided therein.
AM buffer), receives image data from a general-purpose G3 facsimile apparatus on the transmission side via a wireless communication network such as a communication satellite, and sequentially stores the image data in a memory for storing image data. The image data sequentially stored in the image memory is sent to a general-purpose G3 facsimile apparatus on the receiving side, and the image data storage memory performs facsimile communication via a wireless communication network serving as a one-way communication path. However, the line between the transmitting general-purpose G3 facsimile device and the receiving general-purpose G3 facsimile device is maintained in the image data storage memory.

[0003]

However, in the above-mentioned conventional facsimile adapter device, the number of data between the transmitting general-purpose G3 facsimile device and the receiving general-purpose G3 facsimile device depends on the amount of data stored in the image data storage memory. If the image data transfer time per page shifts early or late, it becomes impossible to make the receiving general-purpose G3 facsimile apparatus wait in the G3 facsimile procedure. There has been a problem that the line in the wireless communication network between the receiving general-purpose G3 facsimile apparatuses is disconnected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to maintain a line in a wireless communication network even if the image data transfer time between facsimile apparatuses is shifted. It is an object of the present invention to provide a facsimile adapter device which can perform the following.

[0005]

In order to achieve the above object, a facsimile adapter apparatus of the present invention receives data from a transmitting facsimile apparatus via a wireless communication network serving as a one-way communication path, and transmits the data. A facsimile adapter device for transmitting to a receiving facsimile device, wherein the facsimile adapter device receives image data from the transmitting facsimile device via the wireless communication network, and receives the image data from the receiving device. Storage means for sequentially storing the received image data, transmission means for transmitting the image data stored in the storage means to the facsimile apparatus on the receiving side, and a data amount of the image data stored in the storage means. The transmission time of the image data by the transmitting means is maintained so that communication with the receiving facsimile apparatus can be maintained. And having a control means for controlling the ring.

The wireless communication network corresponds to, for example, a communication network serving as a one-way communication path using a communication satellite.

The transmitting facsimile apparatus and the receiving facsimile apparatus are described in ITU-T Recommendation, 30 (hereinafter,
It is simply called “G3 communication control procedure”. A general-purpose G3 facsimile apparatus for transmitting and receiving image data based on
It includes a personal computer and a workstation having a function of transmitting and receiving image data according to the G3 communication control procedure.

The receiving means corresponds to a receiving circuit, the storing means corresponds to an absorption RAM buffer, the transmitting means corresponds to a communication control circuit, and the control means corresponds to a monitoring circuit and a control circuit.

Therefore, according to the facsimile adapter of the present invention, the transmission timing of the image data is controlled based on the capacity of the image data sequentially stored in the storage means so that the communication with the receiving facsimile can be maintained. The transmission timing of image data to the receiving facsimile apparatus can be corrected even if the image data transfer time between the transmitting facsimile apparatus and the receiving facsimile apparatus is shifted. By absorbing the time lag, it is possible to maintain the line between the facsimile apparatuses in the wireless communication network that is a one-way communication path.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A facsimile communication system showing an embodiment of a facsimile adapter device of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a facsimile communication system showing an embodiment of a facsimile adapter device of the present invention. FIG. 2 is a block diagram showing a schematic configuration inside the receiving-side G3 facsimile adapter device used in the facsimile communication system in the present embodiment.

In FIG. 1, a facsimile communication system 10 transmits and receives image data based on a G3 communication control procedure (including a personal computer and a workstation having a function of transmitting and receiving image data according to the G3 communication control procedure). Transmitting general-purpose G3 facsimile apparatus 11 and receiving general-purpose G3 facsimile apparatus 1
2, a wireless communication network 13 serving as a one-way communication path using satellite communication, and a wireless connection with the wireless communication network 13;
By connecting to the transmitting general-purpose G3 facsimile machine 11,
Wireless communication network 13 and transmitting general-purpose G3 facsimile apparatus 1
A transmission G3 facsimile adapter device 14 that manages an interface between the wireless communication network 13 and the wireless communication network 13 and is connected to the reception general-purpose G3 facsimile device 12 so that the wireless communication network 13 and the reception general-purpose G3 facsimile device are connected. And a transmission-side G3 facsimile adapter device 15 that manages an interface between the two.

The transmitting general-purpose G3 facsimile apparatus 11 reads an original and encodes it by MH encoding or M
The facsimile image data (hereinafter, simply referred to as “image data”) is generated by performing R encoding or the like, and the image data is transferred to the transmission-side facsimile adapter device 14 page by page. Further, as described above, between the transmission-side general-purpose G3 facsimile apparatus 11 and the transmission-side G3 facsimile adapter apparatus 14, and between the reception-side general-purpose G3 facsimile apparatus 12 and the reception-side G3 facsimile adapter apparatus 1
5 is exchanged in the G3 communication control procedure, and therefore, the transmitting side G3 facsimile adapter device 1
4 and the receiving-side G3 facsimile adapter device 15 include:
A function for exchanging in the G3 communication control procedure is included.

In FIG. 2, the receiving-side G3 facsimile adapter device 15 communicates with the transmitting-side general-purpose G3 facsimile device 11 via the transmitting-side G3 facsimile adapter device 14 and the wireless communication network 13 with a signal and image of a G3 communication control procedure. Receiving circuit 16 as receiving means for receiving data
And an absorption RAM buffer 17 as storage means for sequentially storing the image data received by the receiving circuit 16 for each page, and a monitor for monitoring the data amount of the image data sequentially stored in the absorption RAM buffer 17 A circuit 18, a data reading circuit 19 for reading image data stored in the absorption RAM buffer 17, and a communication control circuit serving as a transmission unit for transmitting image data to the receiving general-purpose G3 facsimile apparatus 12 in accordance with a G3 communication control procedure. 20 and G
And a control circuit 21 for controlling the entire reception side G3 facsimile adapter 15. The control means according to claim 1 corresponds to the monitoring circuit 18 and the control circuit 21.

Next, in the facsimile communication system 10 according to the embodiment of the present invention, the general-purpose G3 facsimile apparatus 11 from the transmission side to the general-purpose G3 facsimile apparatus 12 on the reception side are used.
The operation at the time of transmitting image data to is described. FIG. 3 shows the general-purpose G3 facsimile apparatus 11 on the transmitting side and the general-purpose G3 facsimile apparatus at the time of data transmission from the general-purpose G3 facsimile apparatus 11 on the transmitting side to the general-purpose G3 facsimile apparatus 12 on the receiving side.
FIG. 7 is an operation sequence diagram of the facsimile adapter device 14, the receiving-side G3 facsimile adapter device 15, and the receiving-side general-purpose G3 facsimile device 12.

In FIG. 1, a transmission-side general-purpose G3 facsimile apparatus 11 reads an original document page by page, and transmits image data of the original document and a control signal based on a G3 communication control procedure to the transmission-side G3 facsimile adapter apparatus 14 and the wireless communication apparatus. The data is transmitted to the receiving-side G3 facsimile adapter device 15 via the communication network 13.

In FIG. 3, the transmitting general-purpose G3 facsimile apparatus 11 transmits an outgoing signal to the transmitting general-purpose G3 facsimile apparatus 12 when transmitting image data to the receiving general-purpose G3 facsimile apparatus 12.
Send to facsimile adapter device 14 (step S
11). Upon receiving the transmission signal, the transmission-side G3 facsimile adapter device 14 similarly transmits the transmission signal via the wireless communication network 13 to the reception-side G3 facsimile adapter device 1.
5 (step S12). When receiving the outgoing signal, the receiving-side G3 facsimile adapter device 15 sends an incoming signal (call signal) to the receiving-side general-purpose G3 facsimile device 12 (step S13), and activates the receiving-side general-purpose G3 facsimile device 12. .

The receiving general-purpose G3 facsimile apparatus 12
When activated upon receipt of the incoming signal, it responds to the call, and receives a called station identification signal (CED) and a digital identification signal (DIS).
Are sequentially transmitted to the receiving-side G3 facsimile adapter device 15 (steps S14 and S15).

Since the wireless communication network 13 is a one-way communication path from the transmitting side G3 facsimile adapter 14 to the receiving side G3 facsimile adapter 15, the receiving side G3 facsimile adapter 15 transmits the transmitting side G3. The called station identification signal (CED) and the digital identification signal (DIS) are not transmitted to the facsimile adapter device 14. For this reason, the transmission side G3 facsimile adapter device 14 takes a predetermined timing after receiving the transmission signal from the transmission side general purpose G3 facsimile device 11,
Assuming that the called station identification signal (CED) and the digital identification signal (DIS) have been received from the receiving-side G3 facsimile adapter device 15, the transmitting-side general-purpose G3 facsimile device 1
1 and transmits a called station identification signal (CED) and a digital identification signal (DIS) (steps S16 and S1).
7).

The general-purpose G3 facsimile apparatus 11 on the transmission side
Called station identification signal (CED) and digital identification signal (DI
S), the response signal (DCS) is transmitted to the receiving general-purpose G3 facsimile device 12 via the transmitting G3 facsimile adapter device 14, the wireless communication network 13, and the receiving G3 facsimile adapter device 15 (step S1).
8, S19, S20), and then similarly sends a training check signal (TCF) to the receiving general-purpose G3 facsimile machine 12 (S21, S22, S23).

The receiving-side general-purpose G3 facsimile apparatus 12
When the training check signal (TCF) is received, a reception preparation completion signal (CFR) indicating that preparation for image data reception is completed is transmitted to the reception side G3 facsimile adapter device 15 (step S24). After receiving the training check signal (TCF) from the transmission-side general-purpose G3 facsimile apparatus 11, the transmission-side G3 facsimile adapter apparatus 14 takes a predetermined timing in the same manner as described above.
, A reception preparation completion signal (CFR) is transmitted (step S25).

The transmitting general-purpose G3 facsimile apparatus 11
When the reception preparation completion signal (CFR) is received, the image data of one page is transmitted to the receiving general-purpose G3 facsimile apparatus 12 via the transmitting G3 facsimile adapter apparatus 14, the wireless communication network 13, and the receiving G3 facsimile adapter apparatus 15. Transmission (steps S26, S27, S28),
Further, a continuous transmission signal (MPS) indicating that image data is transmitted continuously without changing the transmission mode is transmitted via the transmission side G3 facsimile adapter device 14, the wireless communication network 13, and the reception side G3 facsimile adapter device 15. Then, the data is transmitted to the receiving general-purpose G3 facsimile machine 12 (steps S29, S30, S31).

The receiving general-purpose G3 facsimile apparatus 12
Upon receiving the continuous transmission signal (MPS), a reception completion signal (M) indicating that the reception of the image data for one page has been completed.
CF) to the receiving-side G3 facsimile adapter device 15 (step S32). Note that the transmission side G3 facsimile adapter device 14 is similar to the transmission side general purpose G
After receiving the continuous transmission signal (MPS) from the 3 facsimile apparatus 11, the transmission-side general-purpose G
The 3 facsimile apparatus 11 sends a reception completion signal (MC
F) is transmitted (step S33).

Thereafter, the processing from step S26 to step S33 is repeated until transmission of all image data to be transmitted from the general-purpose G3 facsimile apparatus 11 on the transmission side is completed.

The transmission-side general-purpose G3 facsimile apparatus 11 transmits the last page of image data to the reception-side general-purpose G3 facsimile apparatus via the transmission-side G3 facsimile adapter apparatus 14, the wireless communication network 13, and the reception-side G3 facsimile adapter apparatus 15. When sent to the facsimile machine 12 (step S
34, S35, S36), the transmission-side general-purpose G3 facsimile apparatus 11 transmits a data transmission end signal (EOP) indicating that the transmitted image data is the last data to the transmission-side G3 facsimile adapter apparatus 14, the wireless communication network 13 Then, the data is transmitted to the receiving-side general-purpose G3 facsimile machine 12 via the receiving-side G3 facsimile adapter device 15 (steps S37, S38, and S39).

Next, the receiving general-purpose G3 facsimile apparatus 1
2 receives a data transmission end signal (EOP),
A reception completion signal (MCF) indicating that the reception of the image data for the page has been completed is transmitted to the reception side G3 facsimile adapter device 15 (step S40). In addition, the transmitting side G3 facsimile adapter device 14 is similar to the above,
After receiving the data transmission end signal (EOP) from the transmission-side general-purpose G3 facsimile apparatus 11, the transmission-side general-purpose G3 facsimile apparatus 11
A reception completion signal (MCF) is transmitted (step S4)
1).

When the transmission-side general-purpose G3 facsimile apparatus 11 receives the reception completion signal (MCF), the transmission-side general-purpose G3 facsimile apparatus 14, the transmission-side G3 facsimile adapter apparatus 14, the wireless communication network 13, Is transmitted to the receiving-side general-purpose G3 facsimile apparatus 12 via the G3-side facsimile adapter apparatus 15 (step S4).
2, S43, S44).

With such processing operations, image data is transmitted from the general-purpose G3 facsimile apparatus 11 on the transmitting side to the general-purpose G3 facsimile apparatus 12 on the receiving side.

Next, the operation from reception of the image data by the receiving G3 facsimile adapter device 15 to transfer of the image data to the receiving general-purpose G3 facsimile device 12 will be described in detail.

In FIG. 2, a receiving side G3 facsimile adapter device 15 receives a control signal based on a G3 communication control procedure and image data for each page in a receiving circuit 16. The receiving circuit 16 transmits a control signal based on the G3 communication control procedure to the control circuit 21 and sequentially stores the image data received for each page in the absorption RAM buffer 17.

The control circuit 21 causes the monitoring circuit 18 to monitor the amount of image data stored in the absorption RAM buffer 17, and obtains a monitoring result from the monitoring circuit 18.

Further, the control circuit 21 controls the monitoring circuit 18
Causes the data reading circuit 19 to read the image data from the absorption RAM buffer 17 based on the monitoring result and the G3 communication control procedure. This data reading circuit 19 has an absorption RAM
The image data is read from the buffer 17, and the image data is transferred to the communication control circuit 20.

The control circuit 21 calculates the monitoring result and G
The transmission timing of the image data transmitted from the communication control circuit 20 is controlled based on the three communication control procedures. Then, the communication control circuit 20 transmits one page of image data to the receiving-side general-purpose G3 facsimile apparatus 12 according to the controlled transmission timing.

As shown in FIG. 3, the transmission timing of the communication control circuit 20 is usually after the reception side G3 facsimile adapter apparatus 15 confirms reception of the reception completion signal (MCF) from the reception side general purpose G3 facsimile apparatus 12. After a predetermined time t1 (for example, 2 seconds), the image data is transmitted from the communication control circuit 20 to the general-purpose G3 facsimile machine 12 on the receiving side.

When the control circuit 21 obtains a monitoring result via the monitoring circuit 18 that the amount of data in the absorption RAM buffer 17 is small, that is, the data transfer speed of the image data is low, the control circuit 21 proceeds to FIG. As shown, the transmission timing of the image data to be transmitted next from the communication control circuit 20 is determined by the receiving-side G3 facsimile
Time t2 (for example, 3 or 4 seconds) after the reception of the reception completion signal (MCF) from the 3 facsimile apparatus 12 is confirmed, and the transmission timing of the image data is delayed.

Similarly, when the control circuit 21 obtains a monitoring result via the monitoring circuit 18 that the amount of data in the absorption RAM buffer 17 is large, that is, the data transfer speed of image data is high, Next, the transmission timing of the image data transmitted from the communication control circuit 20 is set earlier than the normal transmission timing, and the transmission timing of the image data is set earlier. Note that the relationship between the data amount stored in the absorption RAM buffer 17 and the transmission timing is preset as shown in FIG. 4, and the transmission timing is set in several steps according to the data amount. It is configured to switch and transmit image data.

As described above, according to the present embodiment, even if the data transfer time between the transmission-side general-purpose G3 facsimile apparatus 11 and the reception-side general-purpose G3 facsimile apparatus 12 is shifted, the reception-side G3 facsimile adapter apparatus is used. 15 corrects the timing of image data transmission to the receiving-side general-purpose G3 facsimile apparatus 12, thereby absorbing a data transfer time lag, and using a wireless communication network serving as a one-way communication path. , 12
The line between them can be maintained.

[0037]

According to the facsimile adapter apparatus of the present invention configured as described above, even if the data transfer time between the general-purpose G3 facsimile apparatus on the transmitting side and the general-purpose G3 facsimile apparatus on the receiving side deviates, the receiving side does not. General purpose G3
By correcting the timing of image data transmission to the facsimile machine, the data transfer time deviation is absorbed,
A line between general-purpose G3 facsimile apparatuses using a wireless communication network serving as a one-way communication path can be maintained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a facsimile communication system showing an embodiment of a facsimile adapter device of the present invention.

FIG. 2 is a block diagram showing a schematic configuration inside a receiving-side G3 facsimile adapter device used in the facsimile communication system in the present embodiment.

FIG. 3 is a diagram illustrating a general-purpose G3 facsimile apparatus, a general-purpose G3 facsimile adapter apparatus, a general-purpose G3 facsimile adapter apparatus, and a general-purpose general-purpose G3 facsimile apparatus when transmitting data from a general-purpose G3 facsimile apparatus on the transmitting side to a general-purpose G3 facsimile apparatus on the receiving side. It is an operation | movement sequence diagram of an apparatus.

FIG. 4 is an explanatory diagram showing a relationship between a transmission timing of image data in a communication control circuit and a data amount of image data in an absorption RAM buffer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 General-purpose G3 facsimile apparatus of transmission side (facsimile apparatus of transmission side) 12 General-purpose G3 facsimile apparatus of reception side (facsimile apparatus of reception side) 13 Wireless communication network 15 G3 facsimile adapter apparatus of reception side (facsimile adapter apparatus) 16 Receiving circuit (receiving means) 17 Absorption RAM buffer (storage means) 18 Monitoring circuit (control means) 20 Communication control circuit (transmission means) 21 Control circuit (control means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyomi Suzuki 94, Koriyama-shi, Fukushima Prefecture, for character shipyard Nippon Telecom Technology Co., Ltd. (72) Inventor Katsumi Watanabe 94, for Koriyama-shi, Fukushima prefecture, character shipyard Nichidate Corporation Within Telecom Technology

Claims (1)

[Claims] 1. A facsimile adapter device for receiving data from a transmitting facsimile device via a wireless communication network serving as a one-way communication path, and transmitting the data to a receiving facsimile device. Receiving means for receiving image data from the transmission-side facsimile apparatus via the wireless communication network; storage means for sequentially storing the image data received by the receiving means; and images stored in the storage means Transmitting means for transmitting data to the receiving-side facsimile apparatus, and transmitting means for transmitting the data to the receiving-side facsimile apparatus based on a data amount of image data stored in the storage means. Facsimile adapter device having control means for controlling transmission timing of image data