JP3287922B2 - Data transmission method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method, and more particularly to a data transmission method and apparatus suitable for transmitting the same data to many terminals using a plurality of lines of a public line network. .

[0002]

2. Description of the Related Art In a system including a center device such as a bank and a number of branch devices (terminal devices) connected to the center device via a public line network, a plurality of public lines are usually connected to the center device via a modem. It is connected. FIG. 2 shows such a system, in which information such as interest rate information is input from a data input device 101 provided in a center device 100, and is input via an output control device 102, modems M1 to Mn, and a public line network 200. FIG. 3 is a block diagram showing a transmission path when transmitting data to a branch device.

FIG. 3 shows a transmission management table 103 and a transmission queue table 104 provided in the output control device 102.
-1, 104-2,..., Which control which branch and which modem, ie, which line, to transmit. That is, a number is assigned to each branch, and the telephone numbers of the branch devices are registered in the transmission management table 103 in the order of the numbers. When transmitting the interest rate information, etc., first, the transmission queue tables 104-1, 104-2,.
Assign telephone numbers of branch devices in order to. In the figure, the telephone numbers of the branches 1 to 10 are allocated to the transmission queue table 104-1 in this order, the telephone numbers of the branches 11 to 20 are allocated to the transmission queue table 104-2 in this order, and so on. When this setting is completed, the telephone numbers are sequentially extracted from each transmission queue table, and the corresponding modems M1, M2,
... A dial signal is sent out to the public network via
When connected to the partner's branch, send the information.

[0004] Assuming that the transmission to the branch 1 is completed by this operation, the transmission queue table 104-1 indicates that the branch 2
The following telephone numbers are sequentially sent to the exit side, then dialing to the branch 2 is started, and the same operation is repeated thereafter.

On the other hand, if it is assumed that a busy signal is returned to the dial of the telephone number of the branch 11 first transmitted from the transmission queue table 104-2 to the modem M2, the branch 12 of the transmission queue table 104-2 is returned. The following telephone numbers are sequentially sent to the exit side, and finally the telephone number of the branch 11 is registered. Then, a dial signal is sent out by the telephone number to the next branch 12, and in the same manner, when the connection is successful, the information is transmitted. When the telephone is busy, the telephone number is returned to the end of the transmission queue table, and retransmission is performed. Wait for the turn.

[0006] As described above, the transmission to all the branches assigned to the respective transmission queue tables is completed, and when the transmission queue tables are all empty, the transmission is terminated.

[0007]

FIG. 4 is a time chart showing the operation of each modem when information such as interest rate information is transmitted to all branches as described above. DD is not busy when dialing. Dial time when you can send immediately,
It shows the sum of the data transmission time and the time required to connect and disconnect the line, and the DB shows the dial time when dialing but busy. And the modems M1, M
In 3, the transmission to each branch is completed without busy and the modem M2
It is assumed that only the branch 11 is busy at the beginning and has been transmitted by retransmission. The time required for dialing varies depending on the length of the other party number, and the time required for data transmission generally also varies depending on the performance of the other party's device. Therefore, the above time DD has a different value depending on the branch. For this reason, for example, as shown in FIG.
If 30 has a small DD and the branch assigned to modems M1 and M2 has a relatively large DD, the transmission completion time of modems M1 and M2 will be longer than that of modem M3 even when there is no busy time. Therefore, in this example, the modem M3
Therefore, the use efficiency of the line connected to the line greatly decreases, and the overall transmission time also increases. Further, when the busy state occurs in the modem M2 as shown in FIG. 4, the line use efficiency is further reduced, and the total transmission time becomes longer.

An object of the present invention is to provide a system for transmitting the same data to many branches using a plurality of modems.
It is an object of the present invention to provide a data transmission method and a device which can use a modem efficiently.

[0009]

The object of the present invention is to provide a data transmission method for transmitting the same information from a center device connected to a plurality of public lines to a plurality of terminal devices via a public line. A transmission management table for storing, for each device, a telephone number of a line to which the terminal device is connected, and an average transmission time which is an average value of time required for past data transmission to the terminal device; Sorting means for sorting the contents of the transmission management table with respect to the average transmission time, and a transmission queue table for registering the telephone numbers of the terminal devices in ascending order of the average transmission time according to the result sorted by the means. The telephone numbers are output to the public line connected to the center device in the order registered in the transmission queue table, and the telephone numbers are connected to the target terminal device. Immediately transmits the above information to the terminal device, and when the transmission on any public line is completed and the line becomes free, the telephone number of the first untransmitted terminal device in the transmission queue table is entered. While repeating the operation of outputting to the above-mentioned free public line and transmitting,
When a connection cannot be made to the telephone number output to any of the public lines, the telephone number of the terminal device is registered as an untransmitted terminal device in the last position of the transmission queue table, and the transmission queue is registered. This is achieved by transmitting information by transmitting the telephone number of the earliest terminal among the untransmitted terminal devices on the table to the public line.

[0010]

Since the transmission is performed using the idle line in order from the terminal device having the longest required transmission time, when the transmission to the terminal device having the shortest required transmission time is started, the other lines are in use. Therefore, the idle time of the other line when the last transmission is being performed is the minimum required transmission time at most,
The use efficiency of the line is improved, and the transmission time to all terminal devices can be reduced. Also, when there is a connection failure such as busy,
The play time of the line is at most equal to or less than the time required for transmission to the last remaining branch, and there is no significant difference in the effect from when there is no connection failure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. FIG. 1 shows an embodiment of a transmission management table 113 and a transmission queue table 114 for realizing the data transmission method and apparatus of the present invention. In the transmission management table 113, in addition to the telephone number of the conventional branch, the number of transmission completions, the average transmission time, the number of busy times, the number of transmission errors, the number of other errors, and the number of other errors recorded based on a certain point in time, and whether the transmission has been completed. Is recorded. Transmission queue table 11
No. 4 is provided in the present invention, and only one branch is sorted in the transmission management table 113 by its average transmission time, and stored in the transmission queue table 114 in ascending order of the average transmission time. In FIG. 1, the average transmission time of the branch 2 is the longest at 15 seconds, followed by the branch 3 at 12 seconds and the branch 1
For 10 seconds, 8 seconds for branch 4, and so on. At this time, what is set in the transmission queue table 114 is the order of the branches 2, 3, 1, 4,. In the transmission queue table 114, the status is set to "0" (untransmitted) before transmission, and all other busy times are also set to zero.

When the transmission queue table 114 has been set, the telephone numbers are sequentially output from the head of the queue, sequentially transmitted to the vacant modems, and the status of the transmitted branch indicates that the transmission has been completed. 1 "
Is rewritten as Assuming that there are three modems, as shown in the time chart of FIG. 5, the telephone number of the branch 2 is output to the modem M1, the telephone number of the branch 3 is output to the modem M2, and the telephone number of the branch 1 is output to the modem 3 one after another. At the same time, the status of those branches is set to "1". These operations are performed within a short time that can be regarded as almost simultaneous. If there is no connection failure such as busy for any modem to the dialed telephone number output, communication to the branch 1 with the shortest average transmission time is completed first, so the modem 3 becomes empty first. . Then, as shown in FIG. 6, the telephone number of the branch 1 and other contents are removed from the transmission queue table 114, and the telephone numbers of the remaining branch 4 and the branches below the branch 1 are moved forward one by one. Although the status of the queue is still "0", the telephone number of the first branch, that is, branch 4, is taken out and sent to the vacant modem M3, and the status is set to "1". FIG. 6 shows the state at this point.

As described above, if transmission is sequentially performed to the vacant modems in the order of the branch having the longest average transmission time, when there is no connection failure such as busy, there is no change in the vicinity of the completion time tE in FIG. As described above, transmission to all branches is completed with little play of the modem. This means that if dialing to the last branch has been started for modem Mk (k = 1 to 3), then at that time another modem other than modem Mk is still in a call and only modem Mk is free. This is because all transmissions are always completed after the time required for transmission to at most one branch from that point. In particular, in the case where there is no connection failure, the average transmission time of the branch sent by each modem at the end is the smaller three, so that the play in the modem, that is, the line, exceeds the small average transmission time. There is no. On the other hand, sorting the contents of the transmission management table 113 is processing that can be performed only by the internal processing of the computer, and this is an extremely short time. Thus, all modems, that is, all lines can be used effectively, and the total transmission time can be reduced.

Next, the transmission queue table 1 shown in FIG.
When the transmission is started from the state of 14, it is assumed that the branch 2 and the branch 3 can transmit as they are as shown in FIG. 7, but the status of the branch 1 is set to "1" and the busy state is returned to the dialing modem M3. . At this time, as shown in FIG. 8, the status is returned to "0" and the data of the branch 1 is moved to the end of the transmission queue table 114. Then, the telephone numbers of the branch 4 and the like are sequentially advanced by one. Also, assume that the busy number of the branch 1 is 1. Then, the status of the first branch whose status is still "0", that is, the status of the branch 4 is set to "1" to the vacant modem M3, and transmission using the modem M3 is performed. FIG.
The state of the transmission queue table 114 at this time is shown.

In the same manner, the operation of dialing the next branch when a free modem is made is repeated. If there is no other connection failure such as busy, retransmission to the branch 1 with a relatively long average transmission time is performed at the end of this repetition. The modem does not become idle and efficient transmission is possible.

When the transmission to all the branches is completed as described above, the number of busy times and the like generated at the time of the transmission are added to the corresponding list in the transmission management table 113, and the average time is calculated using the time actually required for the transmission. Correct the transmission time,
Prepare for the next transmission.

In the above embodiment, when data is sorted and transferred from the transmission management table 113 to the transmission queue table 114, the data is sorted by the average transmission time. The index may be sorted with respect to the index calculated by giving an appropriate weight to the transmission time.

[0018]

According to the present invention, the total transmission completion time can be shortened, and the use efficiency of the computer can be increased as well as the use efficiency of the modem / line.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of a transmission management table and a transmission queue table which are features of the present invention.

FIG. 2 is a configuration diagram of an information transmission system to which the present invention is applied.

FIG. 3 is an explanatory diagram of a conventional transmission method.

FIG. 4 is a time chart showing a transmission operation example when the transmission method of FIG. 3 is used.

FIG. 5 is a time chart showing a transmission operation example when the method of the present invention is used.

FIG. 6 is a diagram showing the contents of a transmission queue table for the operation of FIG. 5;

FIG. 7 is a time chart illustrating an example of a transmission operation when a busy state is detected according to the method of the present invention.

FIG. 8 is a diagram showing contents of a transmission queue table corresponding to the operation of FIG. 7;

[Explanation of symbols]

 100 Center device 113 Transmission management table 114 Transmission queue table 200 Public line network

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 11/00-11/10 H04M 1/26-1/57

Claims (5)

(57) [Claims] 1. A data transmission method for transmitting the same information from a center device connected to a plurality of public lines to a plurality of terminal devices via a public line, wherein the telephone numbers of the terminal devices are arranged in descending order of the average transmission time. Are registered in the transmission queue table, and the telephone numbers are output to the public line connected to the center device in the order registered in the transmission queue table. When the telephone number is connected to the target terminal device, the telephone number is immediately transmitted to the target terminal device. When the above information is transmitted, and transmission on any of the public lines is completed and the line becomes empty, the telephone number of the earliest untransmitted terminal device in the transmission queue table is output to the empty public line. Is repeated, and if a connection cannot be made to any of the telephone numbers output to the public lines, the telephone number of the terminal device is not sent. A terminal device is registered at the rearmost position of the transmission queue table, and information transmission is performed by transmitting the telephone number of the first non-transmission terminal device on the transmission queue table to the public line. A data transmission method characterized by performing: 2. A data transmission method for transmitting the same information from a center device connected to a plurality of public lines to a plurality of terminal devices via a public line, wherein the terminal device is connected to each of the terminal devices. And a transmission management table for storing the telephone number of the transmitted line and the average transmission time which is the average value of the time required for past data transmission to the terminal device. Sorting means for sorting by time;
A transmission queue table for registering the telephone numbers of the terminal devices in descending order of the average transmission time in accordance with the result sorted by the means; and connecting the telephone numbers to the center device in the order registered in the transmission queue table. Output to the target public terminal, and immediately transmit the above information to the target terminal device when connected to the target terminal device. When the transmission on any public line ends and the line becomes free, Repeat the operation of outputting the telephone number of the terminal device that is the earliest terminal device in the queue table to the above empty public line and transmitting it, and for the telephone number output to any public line If the connection cannot be established, the telephone number of the terminal device is registered as an untransmitted terminal device in the last position of the transmission queue table, and the transmission queue is registered. Data transmission method characterized in that the telephone number of those in the rank of the unsent terminal device on Buru to transmit the information as sent to the public network. 3. When transmission to a terminal device registered in the transmission queue table is performed, the transmission time is measured and recorded, and at the end of transmission to all terminal devices, the transmission time is measured using the recorded value. 3. The data transmission method according to claim 2, wherein the value of the average transmission time in the transmission management table is updated to prepare for the next transmission. 4. A column for a failure item indicating a transmission failure including the number of busy times and the number of times a data error is detected when transmission is attempted for each terminal device in the transmission management table and the transmission queue table. In the transmission queue table, the number of occurrences of the item at the time of transmission is recorded in the failure item of the transmission queue table, and when the transmission to all the terminal devices is completed, the recorded value is added to the corresponding column of the transmission management table. Wherein the sorting means sorts the average transmission time and the value of the failure item by multiplying the average transmission time and the value of the failure item by a predetermined weighting factor. 4. The data transmission method according to 2 or 3. 5. A data transmission device for transmitting the same information from a center device connected to a plurality of public lines to a plurality of terminal devices via a public line, wherein the terminal device is connected to each of the terminal devices. And a transmission management table for storing the telephone number of the transmitted line and the average transmission time which is the average value of the time required for past data transmission to the terminal device. Sorting means for sorting by time;
A transmission queue table for registering the telephone numbers of the terminal devices in descending order of the average transmission time according to the result sorted by the means, and the telephone numbers are connected to the center device in the order registered in the transmission queue table. Means for outputting to the public line, and when connected to the target terminal device by this, immediately transmits the above information to the terminal device, and ends transmission on any public line and the line becomes empty When the transmission queue table repeats the operation of outputting the telephone number of the earliest terminal device in the transmission queue table to the empty public line and performing transmission, means,
When a connection cannot be made to the telephone number output to any of the public lines, the telephone number of the terminal device is registered as an untransmitted terminal device in the last position of the transmission queue table, and the transmission is performed. Means for transmitting information by transmitting the telephone number of the first untransmitted terminal device on the queue table to the public line.