JPS6172433A - Data transfer system - Google Patents

Abstract

PURPOSE:To improve the data transfer efficiency by informing the result of discrimination to the transmission side every reception after n times in a system which discriminates data as normal data when n times of coincidence (n<N) is obtained in the reception of same data for N times. CONSTITUTION:In the data transmission system where data is discriminated as normal data when the same data is received for, e.g., 5 times and the data is coincident for 3 times, when a reception circuit 1 completes the reception data D1-D3, they are stored sequentially in buffer memories 2-1-2-3. A discrimination circuit 30 collates mutually the content of the memories 2-1-2-3 and when all three data are coincident, the data D1 is discriminated as a normal reception data and the result of discrimination is informed to the transmission side via a transmission circuit 4. When the transmission side receives it, the repetitive transmission is stopped afterward. When the data D1-D3 are not coincident, the 4th data D4 is received and stored in a memory 2-4. The circuit 30 collates the content of the memory 2-4 with that of the 2-1-2-3, and when they are coincident, the result is discriminated a normal data and the result is informed to the transmission side via the circuit 4. When all the three data are not coincident, the next 5th data is collated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention transmits the same data N times from the transmitting side, collates the repeatedly received data on the receiving side, and collects the data at least n times (n<N). ≠ in a data transfer system that determines the data as normal data if they match.
-Relates to a data transfer method that can improve data transfer efficiency.

When transmitting important data via a transmission path, various attempts have been made to ensure that normal data is transmitted to the receiving side. As one such attempt, the same data is
The so-called n data is transmitted repeatedly, the data received repeatedly is checked on the receiving side, and if the data match at least n times (n<N), the data is determined to be normal data.
-out-of-N method is adopted.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional data transfer method, and FIG. 4 is a diagram showing an example of the determination process in FIG. 3. In Figures 3 and 4, the sending side repeatedly transmits the same data five times (N-5), and the receiving side checks the received data five times and finds a match at least three times (n-3). When data is detected, the data is determined to be normal data.

In FIGS. 3 and 4, a receiving circuit 1 provided on the receiving side receives five received data Di to D5 arriving from a transmitting side (not shown) and stores them in buffer memories 2-1 to 2-5. The data are sequentially stored (step 31 in FIG. 4). When all the received data D1 to D5 have been stored, the determination circuit 3 extracts the received data D1 to D5 from the Puffnoor memories 2-1 to 2-5 and compares them with each other. data (e.g. DI=D2=
When D3) is detected, the received data D1 is determined to be normal data, and the transmitting circuit 4 notifies the transmitting side of the determination result (step 3.3). In addition, if the received data that has matched three or more times cannot be detected as a result of verification, the judgment circuit 3
determines that normal data could not be received, and the transmitting circuit 4 notifies the transmitting side of the determination result (step S4).

[Problem that the invention seeks to solve]

As is clear from the above explanation, in a conventional data transfer system, the receiving side receives data D' for five times.
After receiving all signals 1 to D5, the normality was determined. However, as mentioned above, if the first to third reception data DI to D3 all match, it can be determined that the data is normal even if the fourth and fifth reception data are not received, and the fourth and fifth reception data Data transfer merely occupies the data transfer path.

[Means for solving problems]

The above problem is that the same data is repeatedly transmitted from the transmitting side N times, the repeatedly received data is verified on the receiving side, and if the data has failed at least n times (n<N), the data is determined to be normal data. In a data transfer system that performs judgment, the receiving side performs the above judgment every time data is received from the third time onwards, and if it is judged that the received data matches 0 times or cannot match, the judgment result is sent to the sending side. This is solved by the present invention, which is characterized by providing notification.

[Effect]

In other words, according to the present invention, the receiving side determines the normality of the received data the minimum number of times necessary and notifies the transmitting side of the determination result, so the transmitting side can subsequently stop unnecessary transmissions. , the efficiency of the transmission line is also improved.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a data transfer system according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the determination process in FIG. 1. Note that the same reference numerals refer to the same objects throughout the plan. Also in Figures 1 and 2, the transmitting side repeatedly transmits the same data five times, and the receiving side transmits the same data at least three times.
When data that matches at least twice is detected, the data is determined to be normal data.

In FIG. 1 and FIG. 2, from the transmitting side (not shown)
When the third to third data D1 to D3 arrive, the receiving circuit 1 sequentially stores them in the buffer memories 2-1 to 2-3 (step 511 in FIG. 2). When the reception of the data DI to D3 is completed, the determination circuit 30 selects the buffer memory 2-1.
Extract data DI to D3 from 2-3 and compare them with each other (step 512), and if all three data match (D
The I=D2=D3 data DI is determined to be normal received data (step 513), and the determination result is notified to the transmitting side via the transmitting circuit 4 (step 514). The sending side, which has received the notification, stops repeatedly sending data from then on. Note that if the three data do not match as a result of the comparison (step 5I3), the determination circuit 30 waits for the fourth data D4 to arrive.

When the fourth data D4 arrives from the transmitting side, the receiving circuit 1 stores it in the buffer memory 2-4 (step 515). When the data D4 is completely received, the determination circuit 30
extracts the data D1 to D4 from the buffer memories 2-1 to 2-4 and compares them with each other (step 816), and if the three data match (DI=D2=D4, D1=D
3 = D 4 or D2 = D3 = D4) It is determined that the data D4 is normal received data (Step 517), and the determination result is notified to the transmitting side via the transmitting circuit 4 (Step 5
14). The sending side, which has received the notification, stops repeatedly sending data from then on. Note that if the matching three data are not detected as a result of the verification (step 517), the determination circuit 30 further checks whether all the four data D1 to D4 are inconsistent (step S18); Even when the fifth data D5 arrived, the third data could not be defeated,
It is determined that normal data cannot be received (that is, abnormal reception), and the determination result is notified to the transmitting side via the transmitting circuit 4 without waiting for the arrival of data D5 (step 519).

The sending side, which has received the notification, thereafter stops repeatedly sending out data and moves on to necessary processing such as retransferring data that has been received abnormally. Note that if any two of the data D1 to D4 (for example, D1 and D2) match (step 318), the determination circuit 30 waits for the fifth data D5 to arrive. When the fifth data D5 arrives from the transmitting side, the receiving circuit 1 transfers the data to the buffer memory 2-2.
(step 520). When the data D5 is completely received, the determination circuit 30 selects the buffer memories 2-1 to 2-2.
4 to 4 data (DI=D2, D3 to D5 in the previous example)
Extract and compare with each other, (Steso 4 Pu321
), if the three data match (in the previous example, Dl =02 =
D5) It is determined that the data D5 is normal received data (step 522), and the determination result is notified to the transmitting side via the transmitting circuit 4 (step 514). Note that if three matching data are not detected as a result of matching (step 52
2) The determination circuit 30 determines that normal data cannot be received (that is, abnormal reception), and notifies the transmission side of the determination result via the transmission circuit 4 (step 519).

As is clear from the above description, according to this embodiment, the receiving side determines the normality of the received data every time data D3 to D5 is received from the third time onwards, and when it is determined that the reception is normal or abnormal, Immediately notify the sending side of the determination result.

The transmitting side that receives the notification stops repeating data transmission from then on. As a result, the transmitting side can stop unnecessary repeated transmissions, and the efficiency of the transmission path is also improved.

Note that FIGS. 1 and 2 are only one embodiment of the present invention. For example, when the transmitting side repeatedly transmits the same data five times and the receiving side detects matching data at least three times, The present invention is not limited to determining that the data is normal data, and many other modifications may be considered, but the effects of the present invention remain the same in any case. Furthermore, the configuration of the receiving side is not limited to that shown in the drawings, and many modifications may be considered to the communication processed by the processor controlled by the program, but the effects of the present invention will not be affected in any case. does not change.

〔Effect of the invention〕

As described above, according to the present invention, in the data transfer system, the transmitting side can stop unnecessary repeated transmission of data, and the efficiency of the transmission path is also improved.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a diagram showing a data transfer method according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the determination process in FIG. 1,
Figure 3 is a diagram showing an example of a conventional data transfer method;
The figure is a diagram showing an example of the determination process in FIG. 3. In the figure, 1 is a receiving circuit, 2-1 to 2-5 are buffer memories, 3 and 30 are determination circuits, 4 is a transmitting circuit, and D
1 to D5 indicate (received) data, and Sl to S22 indicate steps. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] The same data is repeatedly transmitted from the transmitting side N times, and the repeatedly received data is collated on the receiving side, and at least n(n
In a data transfer system that determines that data is normal data when data matches <N) times, the receiving side performs the above determination every time data is received from the nth time onward, and determines whether the received data match n times. Or, if it is determined that a match cannot be made, the data transfer method is characterized in that the determination result is notified to the transmitting side.