JPH06225103A - Data communication system - Google Patents

Abstract

PURPOSE:To reduce the communication time and the communication cost by devising the system such that all transmission files to a same destination are sent by one communication. CONSTITUTION:A data capacity management section 8 manages an idle memory capacity of a concerned terminal equipment, a storage data capacity of each stored transmission file, a data capacity of a reception file, and a destination data management section 9 manages destination data and type of a transmission file and a polling reception request file during storage. First when data of a file number 1 among files in the transmission standby state enter the transmission operation by any cause, the destination data management section 9 informs it that a file to the same destination is in existence. The transmission terminal equipment enters the multiple message transmission mode, the destination is called and the information of the multiple message transmission and the total data capacity of the file are noticed to a called party. When the receiver side idle memory capacity is larger than the data capacity of all files, the multiple message transmission reception is started.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a data communication system, and more particularly, to a data communication system for collectively transmitting a plurality of files to the same destination of a data communication device.

[0002]

2. Description of the Related Art As a known document which describes the prior art according to the present invention, there is, for example, "Transmission system of a facsimile machine" in Japanese Patent Laid-Open No. 2-55471. In this publication, when an interruption operation is performed mainly on image information transmission, the image information of the page being transmitted is completely transmitted, and the remaining pages are interrupted by shifting to the recalling state to the same destination. The image information is surely transmitted to the other party.
That is, when an interruption operation is performed during the transmission of image information, the page is divided and the remaining pages are re-transmitted.

Further, in the "facsimile apparatus" of Japanese Patent Application Laid-Open No. 2-137470, when re-call waiting documents are stored in the image memory, a new document for which a calling process is required occurs and both documents are re-issued. If the destinations are the same, the communication time is shortened and the communication cost is reduced by waiting until the recalled call original is called and transmitting it all together.

However, during the conventional line transmission / reception,
Since the data capacity of the entire file to be transmitted and the free memory area on the receiving side have not been negotiated, if the receiving side memory becomes insufficient during the transmission, communication will be interrupted and the original communication In some cases, the time and cost savings were inefficient. In addition, when the line transmission is not possible due to insufficient memory, there is a problem that the transmitting side may repeat useless re-calls several times. Further, during the conventional transmission / reception of transmission / reception, a communication interruption occurs without negotiating the memory capacity, or it is necessary to perform the memory capacity negotiation for the entire transmission data capacity and call again. For this reason, quick and efficient communication was not performed.

[0005]

[Object] The present invention has been made in view of the above-mentioned circumstances, and enables all transmission files of the same destination to be transmitted by one communication. Further, even if the memory capacity negotiation before the serial transmission causes a shortage of memory. Even when there is no need to make unnecessary re-calls, even when the memory is insufficient due to the memory capacity negotiation before transmission, efficient transmission is possible within that memory capacity, enabling transmission with less delay,
The purpose of the present invention is to provide a data communication method that aims to reduce communication time and communication cost.

[0006]

In order to achieve the above object, the present invention provides (1)
When there are a plurality of transmission files to the same destination, there is provided a column transmission means for collectively transmitting and receiving the transmission files, and a notification means for mutually notifying the data capacity of the transmission side transmission file and the free memory capacity of the reception side. However, at the time of starting the line connection, when the free memory capacity of the receiving side is larger than the data capacity of all files on the transmitting side, the line communication transmission / reception is started, and further,
(2) When the free memory capacity on the receiving side is insufficient,
At the time when a free memory area corresponding to the data capacity of this column transmission can be secured, the column transmission from the transmission side is polled, or (3) when there are multiple transmission files for the same destination, the transmission file And a notification means for notifying each other of the data volume of the transmission side transmission file and the free memory capacity of the reception side, and the free memory capacity of the reception side is not available at the start of the transmission. If it is sufficient, the most efficient combination is selected from the data capacities of the files on the transmission side and transmission / reception is started, and (4) In (3) above, a free memory on the reception side. If the capacity is insufficient, the sending side polls and receives the line message from the sending side when an empty memory area corresponding to the data size of the unsent file can be secured. Those were. Hereinafter, description will be given based on examples of the present invention.

FIG. 1 is a block diagram for explaining an embodiment of a data communication system according to the present invention, and is a block diagram when applied to an ISDN facsimile. In the figure, 1 is a system control unit, 2 is an encoding / decoding unit, 3 is an input unit, 4 is an output unit, 5 is an operation unit, 6 is a timekeeping unit, 7 is an image storage unit, 8
Is a data capacity management unit, 9 is a destination management unit, and 10 is a communication control unit. The system control unit 1 performs the control according to the present invention and performs a predetermined facsimile operation. The encoding / decoding unit 2 encodes and compresses the image signal, and also decodes the encoded and compressed image information into the original image signal. The image storage unit 7 is for storing a large number of coded and compressed image information. The clock unit 6 clocks the current time. The communication control unit 10 processes the image information into a communication protocol control or a mode determined by the protocol. The data capacity management unit 8 manages the free memory capacity of the terminal itself, the stored data capacity of each stored and transmitted file, and the data capacity of the received file. The destination data management unit 9 manages the destination data and types of the transmission file and the polling reception request file that are being accumulated.

FIG. 2 is a diagram showing an example of a destination management table (file management table of accumulated files) on the transmitting side in the data communication system according to the present invention. This table is
It is created by the data capacity management unit and the destination data management unit. First, it is assumed that the data of file number 1 among the files waiting to be transmitted starts the transmission operation due to some motive (for example, a timeout for re-call waiting). At this time, the destination data management unit notifies that files to the same destination exist (files 2, 3, 4, 5). The transmission terminal enters the line transmission mode, calls the destination 1234-5678, and at the same time indicates that the line transmission is performed and the total data capacity of the file (300 + 240 + 170 + 180 + 19).
0 = 1080 KBytes) is notified to the receiving side. Figure 4
ISDN (Integrated Services Digital Networ)
FIG. 9 is a calling sequence diagram for making notification using UUI information of D-ch (k: integrated service digital network). In addition,
As another notification method, user data on B-ch may be used. Here, the empty area of the image memory on the receiving side is 6
It is assumed to be 50 KByte.

According to the first aspect of the present invention, the receiving side compares the column communication data capacity of 1080 KByte notified from the transmitting side with the free memory capacity of 650 KByte on the receiving side, judges that the column communication efficiency is impaired, and rejects the incoming call. . In claim 2, at that time, the sender number information (333-4444) included in the [SETUP] message and the correspondence data capacity 1
080 KBytes are acquired and a file management table as shown in FIG. 3 is created. Also, if possible, the fact that the call is recalled by polling reception after the receiving side memory recovery is notified. When the transmitting side recognizes this information, processing such as extending the re-calling interval of the transmission file is prioritized for polling transmission incoming call waiting for the receiving side to recover the memory.

On the receiving side, the destination management table shown in FIG. 3 and the free memory capacity of the own terminal are monitored, and if the free memory area is recovered for some reason (for example, the received data being stored in the memory is output). , The previous sender (33
33-4444), the call for polling reception is made. At this time, the transmitting terminal notified of the free memory capacity after recovery can efficiently transmit the four files in series. In addition, at this time, if the transmission side has further increased the sequence file, the total data capacity of the sequence file may be notified again and the process of claim 1 or 3 may be applied.

According to the third aspect of the present invention, even if the receiving side compares the column communication data capacity of 1080 KByte notified from the transmitting side with the free memory capacity of 650 KByte on the receiving side and determines that the column communication efficiency is impaired, the incoming call is received. Does not refuse, but returns the [CONNECT] message with the free memory capacity of the receiving side added, and leaves the continuation / interruption of communication to the judgment of the transmitting side. On the transmission side, it is judged from the free memory capacity on the reception side whether the connection is possible or not, and if possible, the most efficient combination of files (file 1 + 3 + 4 = 300 + 170 + 18)
By transmitting at 0 = 650 KBytes, it becomes possible to perform the fast and efficient transmission of the series communication. If it is not possible, the transmitting side waits for the re-call, and the receiving side waits for this.

[0012] According to claim 4, at the receiving side, the value obtained by subtracting 1080 column data capacity 1080KBytes notified from the transmission side and 650KBytes actually transmitted data capacity (notified from the data capacity management unit), 1080
-650 = 430KBytes and caller number (3333-
4444) is acquired and a file management table as shown in FIG. 3 is created. After this, if the free memory area is recovered for some reason, the sender (3333-44)
44) The call for polling reception is made to 44). By transmitting the remaining files on the transmitting side, it becomes possible to perform quick and efficient column transmission. In addition, at this time, if the transmission side has further increased the sequence file, the total data capacity of the sequence file may be notified again and the processing of claim 3 may be applied.

FIG. 5 is a flow chart for explaining the transmitting side operation of the data communication system according to the present invention. Hereinafter, each step will be described in order. step1 : First, the transmission of the line transmission is started. step2 : Next, a call is made by adding the total data capacity of the line transmission file. step3 : It is judged whether the receiving side response is rejected. step4: to start the multiple message transmission of the incoming call (polling transmission). step5 : Next, after confirming the vacant memory on the receiving side, the response data is added with the column communication data capacity, and the process goes to step6.

Step 6 : If the destination side response is obtained in step 3,
In response to the response of step 5, it is determined whether or not the receiving side free memory capacity is sufficient. step7: In the step6, if the capacity is sufficient,
Send all files in line. step8: In the step6, if capacity is sufficient, then it is determined whether multiple message possible. Step9 : In Step8 , if possible, optimal column communication is performed within the free memory capacity. step10 : If the transmission is not possible in step 8, the recall interval is extended for the untransmitted file.

Step 11 : If the receiving side is rejected in step 3,
The polling reception from the receiving side determines whether or not to call again. step12 : If the call is recurrent in step 11,
Extend the recall interval. Step 13 : If there is no re-call in step 11, the re-call interval is set to normal. step14 : Recall processing of the untransmitted file is performed through the above steps 10, 12, and 13.

FIG. 6 is a flow chart for explaining the receiving side operation of the data communication system according to the present invention. Hereinafter, each step will be described in order. step1 : Start calling the reception (free memory area recovery). step2 : Next, a free memory capacity is added and a call is made. step3 : Start the incoming call for receiving the line communication. step4: to win multiple message data capacity from the incoming call message.

[0017] step5: through the step2, step4, free memory area to determine whether greater than the multiple message data capacity. Step 6 : If the free memory area is larger than the column data capacity in Step 5, the free memory capacity is added and the incoming call is answered. step7: to receive all of the multiple message files. step8 : In step 5, if the free memory area is not larger than the column data capacity, then it is judged whether the incoming call is rejected. step9 : If the call is not rejected in step8 ,
Answers incoming calls by adding free memory capacity.

Step 10 : It is judged whether or not the reception is made. step11 : If the remote communication is not received in the step 10, the sender side waits for a re-call. step12 : If the call is rejected in step8 ,
Reject the incoming call with the addition of the fact that the call is recalled. step13 : Upon completion of step12, step1
At 0, if the serial communication is received, the system waits for recovery of a free memory area corresponding to an unreceived file.

[0019]

As is apparent from the above description, the present invention has the following effects. (1) Effect corresponding to claim 1: Since all transmission files to the same destination can be transmitted by one communication without fail, the communication time and communication cost can be reduced. (2) Effects corresponding to claims 2 and 4: Even if the memory is insufficient due to the memory capacity negotiation before the serial connection, it is not necessary to make unnecessary re-calls, and the communication time and communication cost can be reduced. (3) Effect corresponding to claim 3: Even when the memory capacity is negotiated before the column transmission, even if the memory is insufficient, efficient column transmission is performed within the memory capacity, and therefore transmission with less delay and communication time and communication cost can be achieved. Can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of a data communication system according to the present invention.

FIG. 2 is a diagram showing an example of a destination management table on the transmitting side in the data communication system according to the present invention.

FIG. 3 is a diagram showing an example of a destination management table on the receiving side in the data communication system according to the present invention.

FIG. 4 is a diagram showing a calling sequence in a data communication system according to the present invention.

FIG. 5 is a flowchart for explaining a transmitting side operation in the data communication system according to the present invention.

FIG. 6 is a flowchart for explaining a receiving side operation in the data communication system according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... System control part, 2 ... Encoding / decoding part, 3 ... Input part, 4 ... Output part, 5 ... Operation part, 6 ... Timing part, 7 ... Image storage part, 8 ... Data capacity management part, 9 ... Address management unit, 10 ...
Communication control unit.

Claims (4)

[Claims] 1. When a plurality of transmission files to the same destination exist, a column communication unit that collectively transmits and receives the transmission files and a data volume of the transmission side column file and a free memory capacity of the reception side are notified to each other. A data communication method comprising: a notification means, and when the free communication capacity of the reception side is larger than the data capacity of all files on the transmission side at the start of the connection, the transmission / reception of the communication is started. 2. When the free memory capacity on the receiving side is insufficient, when the free memory area corresponding to the data capacity of this remote communication can be secured, the remote communication from the transmitting side is polled and received. The data communication system according to claim 1, which is characterized in that. 3. When a plurality of transmission files to the same destination exist, a column communication unit that collectively transmits and receives the transmission files and a data capacity of the transmission side column file and a free memory capacity of the reception side are notified to each other. If the free memory capacity of the receiving side is insufficient at the start of the column transmission, the most efficient combination is selected from the data capacities of the files on the transmitting side to start the column transmission / reception. A data communication method characterized in that 4. When the free memory capacity of the receiving side is insufficient, when the free memory area corresponding to the data capacity of the untransmitted file can be secured at the transmitting side, the column transmission from the transmitting side is performed. 4. The data communication system according to claim 3, wherein the polling is received.