JP2000307792A - Facsimile transmitter-receiver and facsimile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain 2-way fax transmission between a base station and each reception station and fax transmission from a mobile station through stable fax transmission/ reception by radio. SOLUTION: The facsimile communication system is provided with a facsimile transmission section and a facsimile reception section. The facsimile transmission section has a voice signal conversion means 43 that converts an output signal of a radio packet addition means 42 adding a header/footer to a packet resulting from converting an output signal from a facsimile terminal 10 with a packet conversion means 22 into a voice signal, and a voice signal transmission means 51 that transmits an output signal from the conversion means 43 as a radio signal. The facsimile reception section has a radio packet elimination means 42 that eliminates the header/footer of the radio packet from an output signal of a packet demodulation means 43 that demodulates the packet with the header/footer of the radio packet added thereto from a signal received by a voice signal reception means 52 receiving a radio voice signal, and a packet inverse conversion means 21 that converts an output signal from the radio packet elimination means 42 into an analog signal and gives the resultant analog signal to the facsimile terminal 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile transmission / reception apparatus for performing facsimile communication using radio and a facsimile communication system using the same, and is particularly suitably applied as a disaster / disaster prevention system.

[0002]

2. Description of the Related Art Conventionally, as a wireless information system for disaster and disaster prevention, immediate transmission of disaster information and the like from a base station to residents has been performed by using a broadcasting medium and various radios. . As means of immediate transmission of disaster information, etc.,
There are voice transmission by radio, etc., image and voice transmission by TV, etc., but in the event of a disaster, it is necessary to transmit accurate text and graphic information. Transmission of figures, maps, and the like is regarded as important.

A conventional facsimile transmission / reception system using radio for disaster / disaster prevention (disaster prevention radio) includes a base station (fixed station) having a transmission device dedicated to facsimile, and a receiver for individually receiving the facsimile. Each receiving station is provided with a receiving-only facsimile apparatus, and a base station transmits a fax to each receiving station using analog radio.

[0004]

However, in the conventional disaster-prevention wireless system, only the fax transmission from the base station side was possible, so that the information of the disaster location is transmitted by the fax from the disaster location (reception station side). Timely transmission of information was not possible.

On the other hand, if this is to be done, each receiving station must once send a fax to the base station.
It took time and effort. In order to solve this problem, for example, it is conceivable to adopt a method in which all bases are used as base stations, but at present, it takes enormous costs of tens of millions of yen to open one base station. Therefore, this method is not practical.

[0006] Further, in the event of a disaster, a large amount of information needs to be transmitted, but since the band of the disaster prevention radio is limited,
At present, sufficient information cannot be communicated. In addition, accurate information such as text and drawings must be transmitted in the event of a disaster.However, at present, the information is transmitted in a so-called "drift" state using a proprietary protocol for disaster prevention radio. No guarantee has been made.

[0007] In addition, when transmitting a fax image signal on a disaster prevention radio, a conventional facsimile machine cannot handle the facsimile because a proprietary protocol is currently used as described above. Equipment had to be introduced and the cost was very high.

Further, at present, fax transmission from a mobile station such as a mobile vehicle cannot be performed, and it is necessary to load the base station equipment into the mobile vehicle or the like in order to be able to perform this. However, loading such equipment into a mobile vehicle or the like lacks realism and is inconvenient.

In addition, the above-mentioned dedicated facsimile machine exceeds 10 kg and is difficult to carry.
There is no assurance that the transmission side can reliably transmit to the reception side, and there are various problems such as the necessity of confirmation by telephone or the like to confirm reception after fax transmission.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems, and it has been proposed that fax transmission and reception can be performed stably wirelessly, and that fax transmission is performed bidirectionally between a base station and each receiving station. To be able to
It is an object of the present invention to provide a facsimile transmission / reception device capable of transmitting a fax from a mobile station and a facsimile communication system using the facsimile transmission / reception device.

[0011]

SUMMARY OF THE INVENTION A facsimile transmission / reception apparatus and a facsimile communication system according to the present invention, in order to solve the above-mentioned problems, packet conversion means for converting an output signal of the facsimile apparatus into a packet, and wirelessly converting the converted packet into a packet. Wireless packet adding means for adding a header / footer of a packet, audio signal converting means for converting an output signal of the wireless packet adding means into an audio signal, and audio signal transmitting means for transmitting an output signal of the audio signal converting means as a wireless signal A facsimile transmission unit having: a voice signal receiving unit that receives a voice signal by a wireless signal; a packet demodulation unit that demodulates a packet to which a header / footer of a wireless packet is added from a reception signal of the voice signal receiving unit; Radio packet for removing header and footer of radio packet from output signal of demodulation means Comprising a preparative removal means, and a facsimile receiving unit that an output signal of the radio packet removal means and a packet inverse transformation means for supplying to the facsimile machine into an analog signal.

In the facsimile transmission / reception apparatus and facsimile communication system of the present invention, since an analog signal output from the facsimile apparatus is converted into a packet and transmitted wirelessly, a sufficient amount of information is transmitted / received even in a limited band. It becomes possible.

The packet to be used is TCP
By using a packet according to the / IP protocol, the accuracy of information transmission is ensured.

Further, by providing demodulating means for demodulating the output signal of the facsimile apparatus and supplying the same to the packet converting means, and modulating means for modulating the output signal of the packet inverse converting means and supplying the same to the facsimile apparatus, The facsimile machine can be used, and the overall cost and weight are greatly reduced.

[0015]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a configuration diagram of a facsimile transmission / reception device 1 arranged in one station for configuring a facsimile communication system of the present invention. That is, in the facsimile communication system of the present invention, the facsimile transmission / reception device 1 of FIG.
Receiving station, mobile station, etc.).

The facsimile transmission / reception apparatus 1 includes a reading unit 11, a recording unit 12, and a modulation / demodulation circuit 13, and transmits / receives image information relating to a disaster or the like.
, A modulation / demodulation circuit 21, a TCP / IP conversion circuit 22, and an LA
An N adapter 23, a data converter 20 connected to the facsimile machine 10, a LAN adapter 31, a path control circuit 32, and a serial transmission circuit 33, and based on the routing table of the path control circuit 32, A terminal node controller (Terminal Node Controller) including a router 30 that performs path control, a serial transmission circuit 41, an AX.25 conversion circuit 42, and a modulation / demodulation circuit 43.
roller: Hereinafter, referred to as TNC. ) 40, and a wireless device 50 including a transmitting unit 51 and a receiving unit 52.

The reading section 11 of the facsimile apparatus 10 photoelectrically converts an original at the time of facsimile transmission, converts the original into image data, and encodes and compresses the image data to generate image data (hereinafter referred to as compressed image data). , And outputs the compressed image data to the modulation / demodulation circuit 13. Modulation / demodulation circuit 1
3 converts the compressed image data from the reading unit 11 into an analog facsimile signal at the time of the facsimile transmission, modulates the facsimile signal and converts the modulated analog signal (hereinafter, referred to as a modulated facsimile signal) into a data conversion device. 2
Send to 0. On the other hand, when receiving a fax, the modulation / demodulation circuit 13 demodulates the modulated fax signal from the modulation / demodulation circuit 21 of the data conversion device 20, which will be described in detail later, and restores it to encoded compressed image data. 12 is output. The recording unit 12 decompresses the compressed image data from the modulation / demodulation circuit 13 and outputs the decompressed image data to a predetermined recording sheet (paper). In addition,
The facsimile machine 10 is a G3 that is currently widely used.
Standard ones are applicable.

In the data converter 20, the modem 21 demodulates the modulated fax signal from the modem 13 of the facsimile machine 10 at the time of fax transmission to restore the fax signal, and converts the fax signal to TCP /
Output to the IP conversion circuit 22. On the other hand, the modem 21
Modulates the fax signal from the TCP / IP conversion circuit 22 at the time of fax reception, and transmits the modulated fax signal to the modulation / demodulation circuit 13 of the facsimile apparatus 10.

At the time of fax transmission, the TCP / IP conversion circuit 22 converts the fax signal from the modulation / demodulation
It is converted into a packet of the CP / IP protocol, and the converted T
It outputs the CP / IP packet to the LAN adapter 23.
When receiving a fax, the TCP / IP conversion circuit 22 receives a TCP / IP packet from the LAN adapter 23, converts the TCP / IP packet into a fax signal, and outputs the fax signal to the modem 21.

At the time of fax transmission, the LAN adapter 23 adds an Ethernet header / footer to the TCP / IP packet from the TCP / IP conversion circuit 22,
The TCP / IP packet after the addition processing is
Transmit to the N adapter 31. In addition, LAN adapter 23
Receives a TCP / IP packet to which an Ethernet header / footer is added from the LAN adapter 31 of the router 30 when receiving a fax, performs processing for removing the Ethernet header / footer from the TCP / IP packet, TCP / IP packet of TCP / IP
Output to the conversion circuit 22.

In the router 30, a LAN adapter 31
Is the LA of the data converter 20 when sending a fax.
Receiving a TCP / IP packet to which an Ethernet header / footer is added from the N adapter 23, and
A process for removing the Ethernet header / footer from the / IP packet is performed, and the TCP / IP packet after the removal is output to the path control circuit 32. Also, the LAN adapter 31
Is set to T when the fax is received.
An Ethernet header / footer is added to the CP / IP packet, and the TCP / IP packet after the addition processing is output to the LAN adapter 23 of the data converter 20.

The route control circuit 32 has a routing table (not shown). When a fax is received, the serial transmission circuit 3 is controlled based on the routing table.
3 to control the route of the TCP / IP packet input from

At the time of fax transmission, the serial transmission circuit 33 of the router 30 converts a TCP / IP packet input from the path control circuit 32 into serial data, and transmits the converted serial data to the serial transmission circuit 41 of the TNC 40. Send. Further, the serial transmission circuit 33
At the time of receiving a fax, the serial data transmitted from the serial transmission circuit 41 of the TNC 40 is converted into a TCP / IP packet, and the TCP / IP packet is output to the path control circuit 32.

In the TNC 40, the serial transmission circuit 4
1 transmits the serial data transmitted from the serial transmission circuit 33 of the router 30 to the TCP / I at the time of fax transmission.
Restores to a P packet and converts the TCP / IP packet to A
Output to the X.25 conversion circuit 42. When receiving a fax, the serial transmission circuit 41 converts the TCP / IP packet from the AX.25 conversion circuit 42 into serial data, and transmits the converted serial data to the serial transmission circuit 33 of the router 30.

The AX.25 conversion circuit 42 transmits the TCP / IP received from the serial transmission circuit 41 at the time of fax transmission.
The header of the wireless packet (AX.25 packet)
The TCP / IP packet after the addition of the footer is output to the modulation / demodulation circuit 43. The AX.25 conversion circuit 42
Is the TC from the modem 43 when receiving a fax.
From P / IP packets to wireless packets (AX.25 packets)
And the TCP / IP packet after the removal is output to the serial transmission circuit 41.

At the time of fax transmission, the modulation / demodulation circuit 43 generates an audio signal by modulating the packet output from the AX.25 conversion circuit 42, and outputs the audio signal to the transmission unit 51 of the wireless device 50. The modulation / demodulation circuit 43
Demodulates a packet with an AX.25 header / footer from an audio signal from the receiving unit 52 of the wireless device 50 when receiving a fax, and outputs the demodulated packet to the AX.25 conversion circuit 42.

The transmitting section 51 of the radio device 50 transmits the audio signal input from the modulation / demodulation circuit 43 of the TNC 40 to the radio device of another facsimile transmitting / receiving device by radio (disaster prevention radio). On the other hand, the receiving unit 52 of the radio device 50 receives the radio of the audio signal transmitted from the radio device of another facsimile transmitting / receiving device, and outputs the received audio signal to the modulation / demodulation circuit 43 of the TNC 40.

Next, when transmitting a facsimile from the facsimile transmitting / receiving apparatus 1 to another facsimile transmitting / receiving apparatus,
The processing in the reverse case will be described.

When a facsimile transmission / reception device 1 transmits a facsimile to another facsimile transmission / reception device, a document is set on the reading section 11 of the facsimile device 10, and a facsimile number of a transmission destination is input by an operation input button or the like (not shown). This starts the transmission of the fax. Here, the image of the document is converted into compressed image data by the reading unit 11 as described above, and the compressed image data is further converted into a modulated fax signal by the modulation / demodulation circuit 13 and input to the data conversion device 20.

The modulated facsimile signal input to the data converter 20 is restored to a facsimile signal by a modulation / demodulation circuit 21, and the facsimile signal is converted to a TCP / IP conversion circuit 22.
The TCP / IP packet is converted into a packet of the TCP / IP protocol by the LAN adapter 23 and the Ethernet adapter / footer is added to the TCP / IP packet by the LAN adapter 23 via the LAN (Local Area Network).
Is input to

After the Ethernet header / footer with the Ethernet header / footer input to the router 30 is removed from the Ethernet header / footer by the LAN adapter 31 of the router 30, the serial transmission circuit is routed through the path control circuit 32. 33 and the serial transmission circuit 3
At 3, the data is converted into serial data and input to the TNC 40.

The serial data from the router 30 input to the TNC 40 is transmitted to the TCP / I
After being restored to a P packet, the AX.25 conversion circuit 42 converts the AX.
Modulation / demodulation circuit 4 with header / footer of 25 packets added
The signal is modulated into an audio signal in 3 and transmitted to the radio equipment of another facsimile transmission / reception apparatus via the transmission unit 51 of the radio equipment 50 within the band of the disaster prevention radio.

On the other hand, when the facsimile transmission / reception apparatus 1 receives a facsimile from another facsimile transmission / reception apparatus, the disaster prevention radio of the voice signal transmitted from the radio of the other facsimile transmission / reception apparatus is transmitted to the receiving section 52 of the radio 50. And the received audio signal is transmitted to the modulation / demodulation circuit 4 of the TNC 40.
TCP / I with header / footer of AX.25 packet in 3
Demodulated as a P packet. Then, this packet is converted into serial data by the serial transmission circuit 41 after the header and footer of the AX.25 packet is removed by the AX.25 conversion circuit 42, and is again transmitted to the TCP / IP by the serial transmission circuit 33 of the router 30. Restored to packets. Restored T
The CP / IP packet is route-controlled by the route control circuit 32 based on a routing table (not shown).
The data is input to the TCP / IP conversion circuit 22 through each process of adding and deleting the Ethernet header / footer by the LAN adapter 31 and the LAN adapter 23 of the data converter 20. Further, the TCP / IP packet is a TCP / I
The fax signal is converted by the P conversion circuit 22 into a facsimile signal.
Are input as encoded image data to the recording unit 12 through the modulation and demodulation by. Then, the encoded image data is expanded by the recording unit 12 and output as facsimile reception image on a predetermined sheet.

As described above, according to the facsimile transmission / reception apparatus 1, an analog signal output from the facsimile apparatus 10 is converted into a packet and transmitted by radio, so that a band limited as in disaster prevention radio is sufficient. It is possible to transmit and receive a large amount of information.

By arranging the facsimile transmitting and receiving apparatus 1 at all locations of the base station and each receiving station, it is possible to transmit and receive a fax bidirectionally between the base station and each receiving station. It is possible to send faxes from all places. As a result, regarding the information on the disaster location, etc., timely transmission of the information from the disaster location (receiving station side) by facsimile can be performed. Further, since the facsimile transmission / reception device 1 uses a packet based on the TCP / IP protocol, which is a standard protocol such as the Internet, the accuracy and reliability of information transmission are ensured, and confirmation by telephone or the like becomes unnecessary.

Further, in the facsimile transmission / reception apparatus 1, the existing facsimile apparatus 10 can be used, and the overall cost and weight can be greatly reduced. Fax transmission can be performed, and the facsimile machine 10
Since an existing lightweight one can be used, the portable device can be easily carried.

[0037]

As described above, according to the present invention,
Since an analog signal output from the facsimile apparatus is converted into a packet and transmitted wirelessly, a sufficient amount of information can be transmitted and received even in a limited band. In addition, by using a packet based on the TCP / IP protocol, the accuracy of information transmission is ensured. Further, by providing demodulating means for demodulating the output signal of the facsimile apparatus and supplying the same to the packet converting means, and modulating means for modulating the output signal of the packet reverse converting means and supplying the same to the facsimile apparatus, the existing facsimile apparatus is provided. Can be used, and the overall cost and weight can be greatly reduced. Therefore, the mobile station can be installed in a mobile station such as a mobile vehicle to perform fax transmission from the mobile station.

Therefore, according to the present invention, fax transmission and reception can be performed stably wirelessly, fax transmission can be performed bidirectionally between the base station and each receiving station, and fax transmission from the mobile station. And a facsimile communication system using the facsimile transmission / reception apparatus.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a facsimile transmission / reception device arranged in one station for constituting a facsimile communication system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Facsimile transmission / reception apparatus 10 ... Facsimile apparatus 11 ... Reading part 12 ... Recording part 13 ... Modulation / demodulation circuit 20 ... Data conversion apparatus 21 ... Modulation / demodulation circuit 22 ... TCP / IP conversion circuit 23 LAN adapter 30 Router 31 LAN adapter 32 Path control circuit 33 Serial transmission circuit 40 TNC 41 Serial transmission circuit 42 AX.25 conversion circuit 43 ... Modulation / demodulation circuit 50 ... Wireless device 51 ... Transmitter 52 ... Receiver

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Katsuhiko Jinno, 2-20-15 Shinkawa, Chuo-ku, Tokyo Inside Nippon Steel Information and Communication System Co., Ltd. Within Nippon Steel Information and Communication Systems Co., Ltd. (72) Inventor Akihiko Goto 1-22-11, Shinkawa, Chuo-ku, Tokyo Inside Osas Co., Ltd. F-term (reference) 5A06 AA02 AA35 AA37 AC28 AC31 5K030 GA08 HA08 HB04 JL01 JT05 LA08 LB15 5K067 AA41 BB15 BB21 CC08 DD52 EE02 9A001 CC05 CC06 CC07 EE01 EE02 HH24 JJ35 KK56 KZ61

Claims (5)

[Claims] 1. A packet conversion means for converting an output signal of a facsimile apparatus into a packet, a radio packet addition means for adding a header and footer of a radio packet to the converted packet, and a voice signal output from the radio packet addition means. A facsimile transmission unit having an audio signal conversion unit for converting the output signal of the audio signal conversion unit into a signal, and an audio signal transmission unit for transmitting an output signal of the audio signal conversion unit as a wireless signal; an audio signal reception unit for receiving an audio signal based on a wireless signal; Packet demodulation means for demodulating a packet to which a header and footer of a wireless packet are added from a reception signal of the audio signal reception means, and radio packet removal means for removing the header and footer of the radio packet from an output signal of the packet demodulation means Converting the output signal of the wireless packet removing unit into an analog signal and Facsimile transmission apparatus characterized by comprising a facsimile receiving unit and a packet inverse conversion means for supplying the millimeter device. 2. The facsimile transmission unit according to claim 2, wherein the packet conversion unit converts the output signal of the facsimile apparatus into a TCP / I signal.
The packet is converted into a packet of the P protocol, and the packet demodulating means of the facsimile receiving unit converts the received signal of the audio signal receiving means into a header of a wireless packet.
2. The facsimile transmission / reception apparatus according to claim 1, wherein a packet of a TCP / IP protocol to which a footer is added is demodulated. 3. The facsimile transmitting section, wherein the voice signal transmitting means transmits the output signal of the voice signal converting means as a radio signal in a disaster prevention radio band, and wherein the voice signal receiving means of the facsimile receiving section includes: 3. The facsimile transmission / reception apparatus according to claim 1, wherein the facsimile transmission / reception apparatus receives a voice signal based on a radio signal in a radio band. 4. The facsimile transmitting section has demodulating means for demodulating an output signal of the facsimile apparatus and supplying the demodulated signal to a packet converting means, and the facsimile receiving section modulates an output signal of the packet reverse converting means. 4. The facsimile transmission / reception apparatus according to claim 1, further comprising modulation means for supplying the facsimile apparatus. 5. A facsimile communication system using a plurality of facsimile transmission / reception apparatuses according to claim 1.