JPH05236016A - Transfer data length converting system - Google Patents

Abstract

PURPOSE:To surely transfer both long and short data without spoiling the profitability in a transfer data length converting system in a data exchanging system having plural data exchanges interconnected by a long data line and a short data line. CONSTITUTION:A transmission side exchange 1A is provided with a line state monitoring means 200 monitoring the utility of a long line 3 and a short line 4, a transmission data dividing means 300 dividing long data into partial data when the long line is not available and the short line is available and sending the data through the short line, and a transmission data coupling means 500 coupling plural short data into combined data and sending the data through the long line when the long line is available and the short line is not available. Then, a reception side exchange 1B is provided with a reception data coupling means 400 decoding each of the partial data sent through the short line into long data, and a reception data dividing means 600 dividing the combined data sent through the long line to decode plural short data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer data length conversion method in a data exchange system having a plurality of data exchanges connected by a long data line for transferring long data and a short data line for transferring short data. ..

When data lengths of data transferred via a data exchange system vary widely, long data longer than a predetermined data length and short data shorter than a predetermined data length are transferred. By distinguishing the communication lines, the storage capacity of the data buffer provided in the data exchange or the like can be reduced, and the economy of the data exchange system is achieved.

[0003]

2. Description of the Related Art FIG. 6 is a diagram showing an example of a conventional data exchange system, and FIG. 7 is a diagram showing an example of a data transfer process in FIG.

In FIG. 6, data terminals (D
T) two sets of data exchanges 1 accommodating two [individual data
Switch 1_AAnd 1_BData exchange 1_A
And 1_BData terminal (DT) accommodated in each
Two_AAnd 2_BAre two long data each.
Line 3 and short data line 4 (each long data line 3
₁And 3₂And each individual short data line is 4₁Oh
And 4₂Called).

The long data line 3 is used for transferring the long data D _L longer than a predetermined reference data length (for example, 256 bytes), and the short data line 4 is used for the short data D shorter than the reference data length. Used to transfer _S. The maximum allowable length of the long data D _L is set to 4096 bytes.

Each data exchange 1 has a storage capacity of 4
096 bytes long data buffer B _LAnd the storage capacity is 2
56-byte short data buffer B_SAnd are required respectively
A few are prepared.

In FIGS. 6 and 7, the data terminal (D
T) 2_ABut the data terminal (DT) 2 _BLong data D addressed to_L
Data exchange 1_ATo the data exchange 1
_AIs the reference data length (= 256
Byte) and the reference data length (step S1 in FIG. 7).
The received data is long data D because it is longer._LJudge
And (step S2), the line state determination unit 11 receives the long data
Queries the availability of line 3 (step S3).

The line status judging unit 11 monitors the communication statuses of the long data line 3 and the short data line 4, and when it is judged that there is no failure or congestion in each long data line 3 and it is available, Notify that the long data line 3 is available.

The data exchange 1 _A has a line state determination unit 11
When it is notified from the long data line 3 by the device (step S4), the long data line 3 is once stored in the long data buffer B _L (step S5), and then the transmission target length data D _L is transferred to the long data line transmitter 12. Instruct.

The long data line transmission unit 12 selects a long data line (for example, 3 ₁ ) for transmitting the transmission target length data D _L from each of the long data lines 3 and waits for transmission corresponding to the long data line 3 _1. Register in queue 14 ₁ and send queue 14 ₁
The long data D _L is extracted in the order of registration from the long data line 3 ₁
To the data exchange 1 _B via.

[0011] In the data exchange 1 _B, upon receiving the long data D _L whose length data line receiver 16 arriving from the long data lines 3 _1, after temporarily stored in the long data buffer B _L, data exchange to 1 _B Execute the required receiving process.

Note that the line state determination unit 11 cannot use the transmission queue 14 ₁ corresponding to the long data line 3 _{1 because} it is in a congested state, and the long data line 3 ₂ is also used due to a failure or the like. If the long data line 3 is identified as being unavailable, the long data line 3 reports that it is unavailable.

The data exchange 1 _A has a line state determination unit 11
When the long data line 3 is notified from the long data line (step S4), the transmission length data D _L is discarded without being stored in the long data buffer B _L (step S6).

Next, the data terminal (DT) 2 _A sends the short data D _S addressed to the data terminal (DT) 2 _B to the data exchange 1 _A.
Then, the data exchange 1 _A compares the data length of the received data with the reference data length (step S1) and determines that the received data is the short data D _S because it is shorter than the reference data length (step S2). The short data line 4 inquires the state determination unit 11 about availability (step S7).

The line state judging section 11 monitors the communication states of the long data line 3 and the short data line 4, and when it is judged that there is no failure or congestion in each short data line 4 and it is available, Notify that the short data line 4 is available.

The data exchange 1 _A has a line state determination unit 11
When it is notified from the short data line 4 that it can be used (step S8), the short data buffer B _S is temporarily stored (step S9), and then the short data line transmission unit 13 transfers the transmission target short data D _S. Instruct.

The short data line transmission unit 13 selects a short data line (for example, 4 ₁ ) for transmitting the transmission target short data D _S from each of the short data lines 4 and waits for transmission corresponding to the short data line 4 _1. Register in queue 15 ₁ and send queue 15 ₁
The short data D _S is extracted in the order of registration from the short data line 4 ₁
To the data exchange 1 _B via.

In the data exchange 1 _B , when the short data line receiving section 17 receives the short data D _S arriving from the short data line 4 ₁ , it is temporarily stored in the short data buffer B _S and then stored in the data exchange 1 _B. Execute the required receiving process.

Note that the line status judging unit 11 cannot use the transmission queue 15 ₁ corresponding to the short data line 4 _{1 because} it is in a congested state, and the short data line 4 ₂ is also used due to a failure or the like. When the short data line 4 is identified as being unusable, the short data line 4 reports that it is unusable.

The data exchange 1 _A has a line state determination unit 11
When the short data line 4 is notified by the short data line 4 (step S8), the transmission target short data D _{S is transferred} to the short data buffer B.
_It is discarded without being accumulated in _S (step S6).

[0021]

As is clear from the above description, in the conventional data exchange system, the data exchange 1 _A has only the long data line 3 available when the data to be transmitted is the long data D _L. If the long data line 3 is unusable, the transfer of the long data D _L is stopped even if the short data line 4 is available, and the transmission target data is the short data D _S. Is a short data line 4
Determining the availability of only, if short data line 4 is unavailable, if long data line 3 because that has been stopped forwarding even available short data D _S, the length data D _L and a short In order to surely transfer any of the data D _S , it is necessary to provide a sufficient long data line 3 and short data line 4, respectively, which has a problem of impairing the economical efficiency of the data exchange system.

An object of the present invention is to reliably transfer both long data and short data without impairing the economical efficiency of the data exchange system.

[0023]

FIG. 1 is a diagram showing the principle of the present invention. FIG. 1 (a) shows the principle of the present invention (claim 1), and FIG. 1 (b) shows the present invention (claim 1). The principle of items 2 to 4 will be shown.

In FIGS. 1 (a) and 1 (b), 1 is a data switch, 1 _A is a data switch on the transmitting side, 1 _B is a data switch on the receiving side, and 3 is a long data line. 4 is a short data line.

Reference numeral 200 denotes the present invention (claims 1 and 2).
2) The data exchange 1 on the transmitting side _ALine provided in
It is a state monitoring means. 300 corresponds to the present invention (claim 1)
Data exchange 1 on the sending side_AData provided in
It is a dividing means.

Reference numeral 400 is a received data combining means provided in the data exchange 1 _B on the receiving side according to the present invention (claim 1). Reference numeral 500 is a transmission data coupling means provided in the data exchange 1 _A on the transmission side according to the present invention (claims 2 to 4).

Reference numeral 600 denotes a received data division means provided in the data exchange 1 _B on the receiving side according to the present invention (claims 2 to 4).

[0028]

The long data line 3 transfers long data longer than the predetermined data length, and the short data line 4 transfers short data shorter than the predetermined data length.

The line status monitoring means 200 monitors the availability of the long data line 3 and the short data line 4. The transmission data dividing means 300 determines the long data into a plurality of predetermined data lengths when the line status monitoring means 200 determines that the long data line 3 is unavailable and the short data line 4 is available. The data is divided into shorter partial data and transferred to the data exchange 1 _B on the receiving side via the short data line 4.

The reception data combining means 400 identifies partial data from the short data transferred from the data exchange 1 _A on the transmission side via the short data line 4 and divides the same length data to generate each part. Combine the data and restore the original long data.

The transmission data combining means 500 predefines a plurality of short data when the line status monitoring means 200 determines that the short data line 4 cannot be used and the long data line 3 can be used. The combined data longer than the data length is transferred to the data exchange 1 _B on the receiving side via the long data line 3.

The reception data division means 600 identifies and divides the composite data from the data transferred from the data exchange 1 _A on the transmission side via the long data line 3 and restores a plurality of original short data.

It is considered that the transmission data combining means 500 combines only a plurality of short data transmitted to the same data terminal (DT) to generate combined data. Further, it is considered that the transmission data combining means 500 combines a plurality of short data transmitted to a plurality of predetermined data terminals (DT) to generate combined data.

Therefore, even if the long data line cannot be used, long data can be transferred if the short data line is available, and the long data line can be used even if the short data line cannot be used. In that case, short data can also be transferred, and the transferability of both long data and short data is improved without impairing the economical efficiency of the data exchange system.

[0035]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 is a diagram showing a data exchange system according to an embodiment of the present invention, FIG. 3 is a diagram showing an example of a data dividing / combining process in FIG. 2, and FIG. 4 is an example of a short data receiving process in FIG. FIG. 5 is a diagram showing an example of the long data receiving process in FIG. 2. The same reference numerals denote the same objects throughout the drawings.

In FIG. 2, FIG. 1 (a) and FIG. 1 (b)
1 is provided with the line state determination unit 11 as the line state monitoring unit 200 in FIG. 1, and the transmission data division unit 101 is provided as the transmission data division unit 300 in FIG.
Further, a reception data combining unit 103 is provided as the reception data combining unit 400 in FIG. 1A, a transmission data combining unit 102 is provided as the transmission data combining unit 500 in FIG. 1B, and FIG. The reception data division unit 104 is provided as the reception data division unit 600 in FIG.

2 to 5, the data terminal (D
T) 2 _A is the long data D _L addressed to the data terminal (DT) 2 _B
Is sent to the data exchange 1 _A , the data exchange 1
_A is the reference data length (= 256
(Step S11 in FIG. 3) and the received data is determined to be the long data D _L because it is longer than the reference data length (Step S12), the line state determination unit 11 is inquired about the availability of the long data line 3 ( Step S13).

The line state judging unit 11 monitors the communication states of the long data line 3 and the short data line 4, and when it is judged that there is no failure or congestion in each long data line 3 and it can be used, Notify that the long data line 3 is available.

The data exchange 1 _A has a line state determination unit 11
When it is notified from the long data line 3 by the device (step S14) that the long data line 3 is once stored in the long data buffer B _L (step S15), the transmission target length data D _L is transferred to the long data line transmission unit 12. Instruct.

The long data line transmission unit 12 selects a long data line (for example, 3 ₁ ) for transmitting the transmission target length data D _L from each long data line 3 and waits for transmission corresponding to the long data line 3 _1. Register in queue 14 ₁ and send queue 14 ₁
The long data D _L is extracted in the order of registration from the long data line 3 ₁
To the data exchange 1 _B via.

The line state judging unit 11 cannot use the transmission queue 14 ₁ corresponding to the long data line 3 _{1 because} it is in a congestion state, and the long data line 3 ₂ is also used due to a failure or the like. If the long data line 3 is identified as being unavailable, the long data line 3 reports that it is unavailable.

The data exchange 1 _A has a line state determination unit 11
When the long data line 3 is notified by the short data line 3 (step S14), the short data line 4 is sent to the line state determination unit 11.
Inquires about availability (step S16).

The line state judging unit 11 is arranged to connect each short data line 4
If neither failure nor congestion has occurred and it is determined that the short data line 4 can be used, the short data line 4 is notified that it is available. When the data exchange 1 _A is notified by the line state determination unit 11 that the short data line 4 is available (step S17), it transmits the transmission target length data D _L to the transmission data division unit 101,
Instruct division.

The transmission data division unit 101 divides the transmission target long data D _L into a plurality of partial data D _D shorter than the reference data length (step S18), and the original long data D _L is divided into each partial data D _D. Is added to the short data buffer B _S (step S19), and then the partial data D _D is transferred to the short data line transmission unit 13. Instruct.

The short data line transmission unit 13 selects a short data line (for example, 4 ₁ ) for transmitting the instructed partial data D _D from each short data line 4 and transmits the selected short data line 4 ₁ in correspondence with the short data line 4 _1. registered as the short data D _S in queue 15 _1, also transmit queue 15 is extracted from ₁ short data D _S in the order of registration, the short data line 4 ₁ via the data exchange 1 _B
Transfer to.

Note that the line status judging unit 11 cannot use the transmission queue 15 ₁ corresponding to the short data line 4 _{1 because} it is in a congested state, and the short data line 4 ₂ is also used due to a failure or the like. When the short data line 4 is identified as being unusable, the short data line 4 reports that it is unusable.

The data exchange 1 _A has a line state determination unit 11
When the short data line 4 is notified by the user that it cannot be used (step S17), the transfer of the received long data D _L is stopped and discarded (step S20).

Next, the data terminal (DT) 2 _{A transfers} the short data D _S addressed to the data terminal (DT) 2 _B to the data exchange 1 _A.
Then, the data exchange 1 _A compares the data length of the received data with the reference data length (= 256 bytes) (see FIG. 3).
If the received data is determined to be short data D _S because it is shorter than the reference data length (step S11) (step S1)
2) Inquire about the availability of the short data line 4 to the line state determination unit 11 (step S21).

The line state judging unit 11 is arranged to connect each short data line 4
If neither failure nor congestion has occurred and it is determined that the short data line 4 can be used, the short data line 4 is notified that it is available. When the data exchange 1 _A is notified by the line state determination unit 11 that the short data line 4 is available (step S22), the data exchange 1 _A temporarily stores the data in the short data buffer B _S (step S23), and then the short data line transmission unit 13 Is instructed to transfer the transmission target short data D _S.

The short data line transmission unit 13 selects a short data line (for example, 4 ₁ ) for transmitting the transmission target short data D _S from each of the short data lines 4 and waits for transmission corresponding to the short data line 4 _1. Register in queue 15 ₁ and send queue 15 ₁
The short data D _S is extracted in the order of registration from the short data line 4 ₁
To the data exchange 1 _B via.

Note that the line status determination unit 11 cannot use the transmission queue 15 ₁ corresponding to the short data line 4 _{1 because} it is in a congestion state, and the short data line 4 ₂ is also used due to a failure or the like. When the short data line 4 is identified as being unusable, the short data line 4 reports that it is unusable.

The data exchange 1 _A has a line state determination unit 11
When the short data line 4 is notified by the user (step S22), then the long data line 3 is sent to the line state determination unit 11.
Inquires about availability (step S24).

The line status judging section 11 determines the length of each long data line 3.
If neither failure nor congestion has occurred and it is determined that it is available, the long data line 3 is notified that it is available. When the data exchange 1 _A is notified by the line state determination unit 11 that the long data line 3 is available (step S25), the short data D _S to be transmitted is transmitted to the transmission data combination unit 102,
Instruct to join.

When the plurality of pieces of short data D _S are transmitted, the transmission data combination unit 102 combines them with the combined data D _C longer than the reference data length (step S26), and identifies each combined original short data D _S. Information, data length, etc. are added and once stored in the long data buffer B _L (step S27), the long data line transmission unit 12 is instructed to transfer the combined data D _C.

The long data line transmission unit 12 determines the length of each long data
Transmission target composite data D from line 3 _CSend long day
Data line (for example, 3₁) Is selected, long data line 3₁Against
Corresponding transmission queue 14₁Long data D_LRegister as
Also, the transmission queue 14₁To long data D_LExtracted in the order of registration
Long data line 3₁Data exchange 1 via_BTurn to
To send.

Note that the line status determination unit 11 cannot use the transmission queue 14 ₁ corresponding to the long data line 3 _{1 because} it is in a congested state, and the long data line 3 ₂ is also used due to a failure or the like. If the long data line 3 is identified as being unavailable, the long data line 3 reports that it is unavailable.

The data exchange 1 _A has a line state determination unit 11
When the long data line 3 is notified by the user that it cannot be used (step S25), the transfer of the received short data D _S is stopped and discarded (step S20).

On the other hand, in the data exchange 1 _B , when the short data line receiving unit 17 receives the short data D _S arriving from the short data line 4 ₁ , the short data line receiving unit 17 transfers the short data D _S to the received data combining unit 103.

The received data combiner 103 receives the transmitted short data.
Data D_SIs partial data D_DWhether or not the original long data D
_LIs identified by the presence or absence of identification information indicating that the
4 step S31), partial data D_DKnow that not
In other words (step S32), the short data buffer B_STo
After being stored once (step S33), the data exchange 1 _B
To execute the required receiving process, but the partial data D_DAnd
If it is identified (step S32), the partial data D
_DOriginal long data D added to_LAnalyze the identification information
The same length data D_LPartial data D divided from_D
If you collect the
The original long data D is obtained by sequentially combining the data according to the order._L
Is restored (step S34), and the long data buffer B is restored._LTo
After being stored once (step S35), the data exchange 1_B
To execute the required receiving process.

Further, the long data line receiving unit 16 of the data exchange 1 _B receives the long data D _L arriving from the long data line 3 _1.
Is received, it is transmitted to the reception data division unit 104. The reception data division unit 104 identifies whether or not the transmitted long data D _L is the composite data D _C by the presence or absence of the identification information indicating that the original short data D _S are combined (step S in FIG. 5).
41) If it is determined that the data is not the combined data D _C (step S42), it is once stored in the long data buffer B _L (step S43), and then the data exchange 1 _B is caused to execute a required receiving process. _If it is identified as _C (step S42), the composite data D _C is divided based on the identification information and the data length of each original short data D _S added to the composite data D _C , whereby each original short data is divided. The data D _S is restored (step S44) and once stored in the short data buffer B _S (step S4).
5) The data exchange 1 _B is made to execute the required reception processing.

As is clear from the above description, according to this embodiment, even when the long data line 3 is unavailable when the data exchange 1 _A on the transmitting side tries to transmit the long data D _L , When the short data line 4 is available, the long data D _L to be transmitted is divided into a plurality of partial data D _D shorter than the reference data length, and transferred together with the short data D _S via the short data line 4. In the data exchange 1 _B on the receiving side, since the received partial data D _D is combined with the original long data D _L , the long data D _L can be transferred, and the data exchange 1 _A on the transmitting side can transfer the short data. When attempting to transmit D _S , if the short data line 4 is unavailable but the long data line 3 is available, a plurality of short data D _S to be transmitted are longer than the reference data length. Combined with the combined data D _C and the long data D _L Since the data exchange 1 _B on the receiving side divides the received combined data D _C into the original short data D _S , the short data D _S can be transferred.

It should be noted that FIGS.
This is only an example, and the transmission data combining unit 102 transmits
Multiple short data D_SFrom the same incoming data end
End (DT) 2_BShort data D addressed to_SCombine only one
Composite data D_CEach short that is combined by generating
Data D_SDestination data terminal (DT) information added to
It is considered to combine the information into one, but long data line 3
Destination data terminal (DT) information is collected only during transfer of data
Benefits of the same data terminal (DT) 2 _BAddress short
Data D_SDecided to be adopted in consideration of the waiting time until
There is a need to. The destination data terminal (DT) 2_BIs the same
In case of one, synthetic data D_CThe destination data terminal (D
T) 2_BDelivery up to is also considered, but this is the invention
Is not the target of.

Further, from the plurality of short data D _S transmitted by the transmission data combining unit 102, only the short data D _S addressed to a plurality of predetermined data terminals (DT) are combined to form one combined data D _S. Generating _C is also considered. As the plurality of data terminals (DT) to be combined, for example, in a data exchange system in which a plurality of data exchanges are connected from the data exchange 1 _B on the receiving side,
When a plurality of data terminals (DT) accommodated in the same incoming data exchange are considered, and further the data exchange system provides the closed communication service, the plurality of data terminals (DT) belonging to the same closed communication network are In any case, as in the case of combining the short data D _S addressed to the same data terminal (DT) 2 _B described above, it is necessary to carefully consider the interests and decide to adopt it.

The data exchange 1_AAnd 1_BIs that
Connected by two long data lines 3 and four short data lines 4.
It is not limited to what is continued, many other variations
However, the effect of the present invention is different in any case.
Absent. In addition, each data exchange 1 _AAnd 1_BThe configuration of is shown
It is not limited to what is done, many other variations
However, the effect of the present invention does not change in any case.
Yes. Furthermore, the data exchange system that is the subject of the present invention is
It goes without saying that it is not limited to what is shown.

[0065]

As described above, according to the present invention, in the data exchange system, even if the long data line is unavailable, if the short data line is available, the long data can be transferred, and the short data line can be transferred. Even if is not available, short data can be transferred if the long data line is available, and the transferability of both long data and short data is improved without impairing the economical efficiency of the data exchange system.

[Brief description of drawings]

FIG. 1 is a diagram showing the principle of the present invention, wherein FIG. 1 (a) shows the principle of the present invention (claim 1), and FIG. 1 (b) shows the principle of the present invention (claims 2 to 4). Indicates

FIG. 2 is a diagram showing a data exchange system according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a data division / connection process in FIG.

FIG. 4 is a diagram showing an example of a process of receiving short data in FIG.

5 is a diagram showing an example of a process of receiving long data in FIG.

FIG. 6 is a diagram showing an example of a conventional data exchange system.

7 is a diagram showing an example of a data transfer process in FIG.

[Explanation of symbols]

 1 data exchange 2 data terminal (DT) 3 long data line 4 short data line 11 line status determination unit 12 long data line transmission unit 13 short data line transmission unit 14, 15 transmission queue 16 long data line reception unit 17 short data line Reception unit 101 Transmission data division unit 102 Transmission data combination unit 103 Reception data combination unit 104 Reception data division unit 200 Line state monitoring means 300 Transmission data division means 400 Reception data combination means 500 Transmission data combination means 600 Reception data division means

Claims (4)

[Claims] 1. A long data line (3) for transferring long data longer than a predetermined data length and a short data line (4) for transferring short data shorter than the predetermined data length. In a data exchange system having a plurality of data exchanges (1), a line state monitoring means for monitoring the availability of the long data line (3) and the short data line (4) in the data exchange (1 _A ) on the transmission side ( 200), the line status monitoring means (200) cannot use the long data line (3), and the short data line (4)
Is determined to be usable, the long data is divided into a plurality of partial data shorter than the predetermined data length, and the data switch (1) on the receiving side is passed through the short data line (4). transmitting data dividing means for transferring the _B) (3
00) to identify the partial data from the short data transferred to the data exchange (1 _B ) on the receiving side from the data exchange (1 _A ) on the transmitting side via the short data line (4). Then, the received data combination means (40) that combines the partial data generated by dividing the same-length data and restores the original length data.
0) is provided, a transfer data length conversion method. 2. A long data line (3) for transferring long data longer than a predetermined data length and a short data line (4) for transferring short data shorter than the predetermined data length. In a data exchange system having a plurality of data exchanges (1), the transmission side data exchange ( _1A ) monitors the availability of the long data line (3) and the short data line (4). 200), the line status monitoring means (200) cannot use the short data line (4), and the long data line (3)
Is determined to be usable, the plurality of pieces of short data are combined into combined data longer than the predetermined data length, and the data switch (1) on the receiving side is connected via the long data line (3). _B ) to transmit data combining means (5)
00) to identify the composite data from the long data transferred from the data exchange (1 _A ) on the transmission side to the data exchange (1 _B ) on the reception side via the long data line (3). A transfer data length conversion method, characterized in that reception data division means (600) is provided for dividing and dividing a plurality of original short data. 3. The transmission data combining means (500) comprises:
3. The transfer data length conversion method according to claim 2, wherein only the plurality of short data transmitted to the same data terminal are combined to generate the composite data. 4. The transmission data combining means (500) comprises:
3. The transfer data length conversion method according to claim 2, wherein a plurality of pieces of short data transmitted to a plurality of predetermined data terminals are combined to generate the composite data.