JP2502321B2 - Wireless printing telegraph device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to wireless printing and telecommunication in which characters are transmitted using radio waves in the short-wave band, and more particularly, to a printing device for modulating and demodulating character data, and this printing device. The present invention relates to an improvement in a connection procedure of a line with a control device which controls an electric device and inputs / outputs character information.

(Prior Art) For example, wireless printing and telegraph communication performed between a land shore station and a ship station has recently been automated centering on automatic connection with a land telex network.

Conventionally, in an automated coast station, when a wireless line is available and an incoming call from a ship is possible, a skyline signal is sent to inform the ship of this.

(Problems to be Solved by the Invention) However, in the recent congestion state of short-wave band frequencies, the influence of the sky signal during non-communication on other stations has become non-negligible. There is a tendency to refrain from using skyline signals.

For this reason, the Vessel Station will call the Coast Station without knowing the usage status of the Coast Station, resulting in operational problems due to simultaneous calls from the Coast Station and the Vessel Station, and scheduled services scheduled by the Coast Station. There is a risk of inconvenience such as being disturbed.

For example, if a simultaneous call from the coast station and the ship station occurs,
In the conventional printing device, even if the control device issues a selective call request, the call from the ship station may be prioritized depending on the timing of simultaneous calls. It is necessary to comply with the request from the station side, which complicates the line processing when designing the automated coast station.

Further, even when the coast station regularly carries out well-known services for a large number of vessels, if the response to the selective call from one vessel may occur, the schedule may not be kept.

Therefore, the present invention allows the control device to freely control the incoming call operation of the printing device, and performs a complicated handling process for a random selective call from the ship station that occurs because the skyline signal is not used. It is an object of the present invention to provide a wireless printing and telegraph device that does not need to be prepared and can perform stable automatic communication operation.

(Means for Solving Problems) That is, the wireless printing and telegraphing device of the present invention includes a bidirectional wireless communication means, a printing device for performing wireless printing and telegraphing communication by the ARQ method, and input / output of the printing device. In a wireless printing and telegraph device including a control device that performs a terminal operation, the printing device supplies a reception line securing signal to the control device when there is a selective call from a partner station, and the control device When the selective call is not made from the control device side, the positive response signal to the receiving line securing signal is supplied to the printing device, and when the selective call is made from the control device side, the printing device is made. Is supplied to the printing apparatus with a transmission line securing signal that prohibits the terminal from responding to a call from the partner station.

(Operation) When the printing device receives a selective call from the partner station,
When the selective call is not made from the control device side, an affirmative response signal from the control device is received, and the response to the call from the partner station is returned to start the wireless printing and telecommunication. Further, when the selective call is made from the control device side, the reception line securing signal from the control device is received and the call of the partner station is ignored.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.

The wireless printing and telegraph apparatus 1 according to this embodiment is configured as an automated coast station, and as shown in FIG.
Printing device 2 for wireless printing and telegraph communication by ARQ method
And a control device 3 for performing an input / output terminal operation of the printing device 2, a transmitter 4 and a receiver 5, and automatically communicates with the ship station wireless printing and telegraph device 6. .

As shown in FIG. 1, the printing apparatus 2 includes a communication control unit 21.
A reception line securing signal sending means 22, a transmission line securing signal detecting means 23, an acknowledgment signal detecting means 24, a receiver input demodulating section 25, and a transmitter output modulating section 26. . Among these, the receiving line securing signal sending means 22 is adapted to supply the receiving line securing signal to the control device 3 when receiving the selective call from the ship station wireless print telegraph device 6.

Further, the control device 3 includes an input / output control unit 31 and a communication control unit.
32, a receiving line securing signal detecting means 33, a transmitting line securing signal sending means 34, and an acknowledgment signal sending means 35. Of these, the transmission line securing signal transmitting means 34
Is configured to supply a transmission line securing signal to the power-charging device 2 prior to issuing a selective call request from the control device 3. Also, the affirmative response signal sending means 35
Is a receiving line securing signal detecting means for receiving the receiving line securing signal.
When 33 is received, the positive response signal is supplied to the printing apparatus 2 only when the transmission line securing signal has not been transmitted yet. In other words, the control device 3 determines whether to return an affirmative response to this signal or a transmission line securing signal according to the processing status at the time of receiving the receiving line securing signal, and to return the positive response signal and the transmission line securing signal. Any of the securing signals is supplied to the printing apparatus 2 side.

In the printing apparatus 2, when the affirmative response signal detecting means 24 receives the affirmative response signal from the control device 3, the response to the call of the ship station wireless printing and telegraphing device 6 is returned to start the wireless printing and telecommunication. Further, when the transmission line securing signal detecting means 23 receives the receiving line securing signal from the control device 3, the calling of the ship station wireless printing and telegraph device 6 is ignored. In other words, the printing apparatus 2 does not return a response signal to the ship station wireless printing and telegraph apparatus 6 until it receives an affirmative response signal from the control apparatus 3, and suspends the wireless line connection processing.

As described above, the wireless printing / telegraph device 1 according to this embodiment
So, even if a simultaneous call from the coast station and the ship station occurs,
The coast station side is prioritized by the transmission line securing signal of the control device 3 to start the wireless printing and telecommunication. FIGS. 3A to 3C are schematic diagrams showing the line connection operation of the wireless printing and telegraph apparatus 1 as described above. That is, the third
FIG. 7A shows a case where the incoming call function of the printing apparatus 2 is stopped by the transmission line securing signal. In this case, the selective call from the ship station A is ignored, and the coast station to the ship station B is ignored.
And a print telegraph communication is started. Further, FIG. 3 (b) shows a case where the incoming call function of the power-charging device 2 is effective, and the print telegraphic communication is performed based on the selective call from the ship station. Further, FIG. 3 (c) shows a case where the selective call from the ship station is interrupted by the line securing signal from the control device 3. In other words, this is a case where a simultaneous call is made from the coast station and the ship station, and the coast station is the priority station.
The selective call from the station is ignored, the selective call is made from the coast station to the ship station B, and the printing and telecommunication is started.

(Effects of the Invention) As described above, according to the present invention, the control of the incoming operation of the printing apparatus is controlled by the reception line securing signal from the printing apparatus, the transmission line securing signal from the control apparatus, and the acknowledge signal. It can be done freely from the device. Therefore,
It is not necessary to prepare a complicated handling process for a random selective call from the ship station that occurs because the skyline signal is not used. Further, for example, the scheduled service or the like scheduled by the coast station can be performed on time, and a stable automatic communication operation can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a system diagram of a wireless printing and telegraph apparatus according to the same embodiment, and FIGS. 3A to 3C are line connection operations of the wireless printing and telegraph apparatus. It is a schematic diagram which shows. 1 ... Wireless printing telegraph device, 2 ... printing device, 3 ... control device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Kimura 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Within Nippon Telegraph and Telephone Corporation (72) Inventor Junichi Hara 1-1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation (72) Inventor Yoshimitsu Ijo 5-1027 Minamiazabu, Minato-ku, Tokyo Anritsu Corporation (72) Inventor Satoshi Kusama 5-1027 Minamiazabu, Minato-ku, Tokyo Anritsu Shares In the company

Claims (1)

(57) [Claims] 1. A narrow-band direct printing telegraph device (hereinafter, referred to as a printing device) having a bidirectional wireless communication means and performing wireless printing telegraph communication by an ARQ system, and performing an input / output terminal operation of the printing device. In a wireless printing and telegraph device including a control device, the printing device supplies a reception line securing signal to the control device when there is a selective call from a partner station, and the control device is controlled by the control device side. When the selective call is not made, the positive response signal to the receiving line securing signal is supplied to the printing apparatus, and when the selective call is made from the control apparatus side, the printing apparatus is sent from the partner station. A wireless printing and telegraph device, characterized in that a transmission line securing signal for prohibiting a response to the calling of the above is supplied to the printing device.