JPH01286562A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To facilitate the constitution for the reduction of communication time and the reception confirming control by adding a function provided with a specific delay time with each reception station and sending a reception confirming signal. CONSTITUTION:In facsimile equipments being reception stations 22A-22N, the system is so designed that a reception confirming signal is sent via a specific delay time possessed to each reception station. Thus, it is not required to send the reception acknowledge signal from a transmission station 21 and a confirming signal representing the reception confirming state is sent sequentially from the plural reception stations 22A-22N and the communication time for confirming the reception is halved. Moreover, since a signal representing the reception confirming state is automatically sent from the reception station, the control procedure for confirmation and the reception acknowledge are not required. Thus, the communication time is reduced and the control is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile device suitable for application to a multi-drop network.

[Background of the Invention] As shown in FIG. 5, a network with a multi-drop configuration has a plurality of receiving stations 22A and
~22N are connected in parallel.

A network with such a multi-drop configuration is particularly suitable for broadcast communication processing.

When transmitting information signals using this network, as shown in FIG.
After sending an activation signal to 22N and putting them all in an activated state, the same information signal is sent to the plurality of receiving stations 228 to 22N at the same time. As a result, each receiving station 2
The same information signal is recorded in 2A to 22N.

Therefore, facsimile machines are usually used as the transmitting station 21 and receiving stations 22A to 22N conveniently used in such networks.

In this way, one transmitting station 21 transmits the same information signal [P
When the same information signal is recorded (broadcast recording) at multiple receiving stations by transmitting it to the three receiving stations 22A to 22N of J, it is possible to determine in which receiving station an abnormality has occurred. There is a need. For this reason, conventionally, a reception confirmation means as shown in FIG. 6 has been adopted.

That is, in such broadcast communication, when a reception confirmation signal is sent from each receiving station at the same time as the information signal ends, a (9j collision) of the reception confirmation signal occurs on the transmitting station 21 side.To avoid this, In addition, a method is adopted in which the transmitting device 21 separately adjusts the reception status of each of the receiving stations 22A to 22N.

That is, as shown in FIG. 6, at the same time as the transmission of the information signal ends, the reception response (a) is sent to the first receiving station 22A.
I! The 8th recognition signal is sent to all signal stations 21.

After the sending of this reception response signal is completed, a response signal is sent to the second receiving station 22B in the same manner as described above, and in response, the receiving station 22B side sends a reception confirmation signal to the transmitting station 22B.
It is configured to be sent to.

[Problems to be Solved by the Invention] By the way, in a facsimile machine used in such a network with a multi-drop configuration, for each facsimile machine, the I3 receiving station 22A
~22N, when providing a function that can send out AE (No. 3), the communication time required to confirm reception is reduced by inquiring about the reception status of each receiving station as described above. There are disadvantages in that the number increases and each control becomes complicated.

Therefore, the present invention proposes a facsimile device suitable for application to such a multi-drop network, and which can shorten communication time and easily control the facsimile device.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in this invention,
This system is characterized in that the end of the information signal is detected, and a reception confirmation number 43 can be sent out after a fixed delay time of the receiving station.

[Operation] A system is created in which a reception confirmation signal can be sent out after a delay time unique to each receiving station is established in a facsimile machine that constitutes each receiving station.

As a result, there is no need for the transmitting station 21 to send out a reception response signal, and multiple receiving stations 22
Confirmation signals indicating reception confirmation status are sequentially transmitted from A to 22N.

Therefore, the communication time for receiving confirmation can be reduced by half or less compared to the conventional method. In addition, since the receiving station automatically sends a signal indicating the reception confirmation status, there is no need for control procedures for reception response and confirmation.
Control becomes extremely easy.

[Embodiment] Next, a case in which an example of the facsimile apparatus according to the present invention is applied to the above-mentioned multi-drop configuration network will be described in detail with reference to FIG. 1 and subsequent figures.

FIG. 1 is a system diagram showing an example of communication control means 10 according to the present invention built into each facsimile machine.

This communication control means 10 has a CPU 1, and the reading of originals, the control of the transmission (ε line, the recording of incoming originals, etc.) are all managed by this CPU. It also has the function of determining the sending timing for sending.

In FIG. 1, the document is read into the CPUI via the interface 3, and after being subjected to appropriate image processing, the document is sent to the network control circuit (NCLI) 4 and the communication line (
Telephone lines, dedicated lines, etc. are used. ) 5 and then sent to the other party's station.

The received image information is subjected to appropriate signal processing by the CPU, and then sent to the recording means 7 via the interface 6.
The incoming image information is recorded on thermal recording paper or the like.

8 indicates a ROM in which various control programs are stored;
A program for communication processing according to the present invention, that is, reception confirmation processing at the time of broadcast communication, is also stored in this ROM 8. Further, 9 is a RAM that can be used as an image memory or the like.

FIG. 2 is a diagram showing the communication control according to the present invention, particularly the reception confirmation state in the circular communication A5, in which a start signal is first sent from the transmitting station 21 to all the 48 receiving stations 22A to 22N, Upon receiving this activation signal, each receiving station 22A to 22
N enters the activated state. After the activation signal, an information signal is sent from the transmitting station 21 side. As a result, this information signal is simultaneously recorded at the receiving station. When the information signal ends, the i stations 22A to 22N that detect this end send a reception confirmation signal to the transmitting station 21 indicating the reception status of information No. 43 held by each receiving station.

Specifically, for example, in the first receiving station 22A, a reception confirmation function is sent out at the same time as the information signal ends. Following this, the second receiving station 22B similarly sends out a confirmation signal indicating its reception status. The confirmation signal transmission interval t in this case can be set arbitrarily, but at least the second receiving station 22B is configured to transmit the confirmation signal to the transmitting station 21 after the confirmation signal interval t has elapsed. It is set.

In this way, reception confirmation signals are sent sequentially at predetermined intervals (a
It is transmitted to the station 21 side.

By doing this, the receiving response 48 is received on the transmitting station 21 side.
It becomes possible to check the reception status at each receiving station 22A to 22N without losing the signal.

FIG. 3 is a brooch yard showing an example of a control program that achieves such a reception confirmation function.

First, when this communication control program starts as described above, it is checked whether there is an activation signal from the transmitting station 21 (step 31). When the arrival of the activation signal is detected, each receiving station 22A to 22N enters the recording mode and receives the information signal (step 32).

Thereafter, the end of this information (number a) is detected, and from that point on, a timer unique to each of the three receiving stations 22A to 22N is set (step 33).

As described above, when the interval between reception confirmation signals is set constant, and there are N receiving stations, the timer time of the Nth receiving station 22N can be set to (N-1)t. Therefore, the first
The timer time of the receiving station 22Δ is O. The timer time of the second receiving station 22B is now. As a result, a response sequence of reception confirmation signals as shown in FIG. 2 is formed. In this way, after the receiving station-specific timer time is set, the timeout status of that timer time is checked, and if the timer timeout occurs, a reception confirmation signal is sent and this communication ε control procedure is ended. becomes (step 34.35).

With such a reception confirmation state, it is possible to avoid collisions of reception confirmation signals sent from each receiving station, and it is also possible to confirm the reception state at each receiving station without having to adjust the timing individually. Colander.

FIG. 4 shows another example of the facsimile apparatus according to the present invention, in which the transmission time is determined by hardware delay elements 23A to 23N, instead of generating the inherent delay time of the receiving station in software. That's what you're trying to get.

Therefore, each of the receiving stations 22A to 22N is set with a unique delay time of the delay elements 23A to 23N added thereto.

Even in such a case, even if the reception confirmation signals to be transmitted are generated simultaneously at each receiving station 22A to 22N, a reception confirmation signal sequence similar to that shown in FIG. 2 is formed due to the presence of the delay elements 23A to 23N. I'll figure it out.

Therefore, even in such a hardware configuration, it is possible to effectively avoid collisions of reception confirmation signals obtained from each receiving station.

[Effects of the Invention] As explained above, in the facsimile apparatus according to the present invention, a function is added that allows a reception confirmation function to be sent after each has its own delay time. (In order to avoid conflicts, it is not necessary to use a method in which the transmitting station separately adjusts the receiving δ state for each receiving ε station and grasps the receiving state. It has the characteristics of being extremely easy to use, perhaps because it is designed to shorten Song transaction time and control reception confirmation.

Therefore, the facsimile apparatus according to the present invention is extremely suitable for application to a multi-trop network that performs broadcast communication as described above.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an example of the communication control means that is the main part of the facsimile device according to the present invention, FIG. 2 is a diagram showing the signal transmission/reception status at that time, and FIG. 3 is an example of the communication control procedure. FIG. 4 is a configuration diagram of a multi-drop network showing another example to which the present invention is applied;
FIG. 5 is a block diagram of a conventional multi-drop network, and FIG. 6 is a diagram showing the transmission and reception status of No. 48 used in that case. 1...CPU 2...NCU 7...Recording means 10...Communication control means

Claims (1)

[Claims] (1) A facsimile device characterized in that it is capable of detecting the end of an information signal and transmitting a reception confirmation signal after a fixed delay time of the receiving station.