CN104184543B - A kind of methods, devices and systems of data transmission - Google Patents

Abstract

The present invention provides a data transmission method, device and system, which can reduce the repetition of data detection in link transmission, reduce the link transmission overhead caused by retransmission, and improve the working efficiency of the system. The specific method is: obtain the data to be transmitted, the data to be transmitted includes the information of the sending target, and determine the sending target according to the information of the sending target; encapsulate the data packet header for the data to be transmitted, and calculate the error detection for the data packet header Error correction code, send data with data packet header; when receiving data, receive the encapsulated data, decapsulate the data containing error detection and error correction code, and detect the received data, when there is an error, according to the detection The parity bit of the error correction code performs error correction on the data, and if the error correction of the data cannot be completed by the error detection and error correction code, then request data retransmission according to the preset error tolerance setting. The invention is used for data transmission.

Description

A method, device and system for data transmission

technical field

The present invention relates to the field of computers, in particular to a data transmission method, device and system.

Background technique

Usually, in link transmission, a cyclic redundancy check (CRC, Cyclic Redundancy Check) method is used to protect the data to be transmitted. However, since the CRC only has an error detection function but not an error correction function, a retransmission mechanism is also required to ensure the accuracy of the data to be transmitted while using the CRC. In the server, the data transmission of the memory will use the error detection and correction code (ECC, Error Correction Code) to detect the accuracy of the data, and can repair the error to a certain extent.

In the existing link transmission technology, in the process of data to be sent from the memory to the sending port of the node computer, ECC is used as a data protection measure; while in the transmission process from the sending node computer to the receiving node computer, CRC is used To check the correctness of data transmission. In this way, the transmission method of using CRC and ECC at the same time increases the repeatability of data detection. At the same time, because CRC protects a whole data packet, when an error is detected in the data packet, the error can only be eliminated by retransmitting the data packet. This will increase the transmission overhead of the entire link and seriously reduce the working efficiency of the system.

Contents of the invention

The present invention provides a data transmission method, device and system, which can reduce the repetition of data detection in link transmission, reduce the link transmission overhead caused by retransmission, and improve the working efficiency of the system.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a data transmission method is provided, the method comprising:

Obtaining data to be transmitted, where the data to be transmitted includes information about a sending target;

determining the sending destination of the data to be transmitted according to the information of the sending destination;

Encapsulate a data packet header for the data to be transmitted, calculate an error detection and correction code (ECC) for the data packet header, and send the data with the data packet header ECC.

In a first possible implementation manner, in combination with the first aspect, encapsulating a data packet header for the data to be transmitted, and calculating an ECC for the data packet header, and sending the data with the data packet header ECC includes:

When the data to be transmitted needs to be sent to a remote computer, encapsulate the data packet header for the data to be transmitted, and calculate the ECC of the data packet header;

Send the data including the ECC of the data packet header.

In a second aspect, a data transmission method is provided, the method comprising;

When the forwarding node receives the data packet header with ECC, if the forwarding destination node has a data packet capable of storing the data packet header, it will directly forward the data packet.

In a third aspect, a method for data transmission is provided, the method comprising:

Receiving encapsulated data including error detection and correction code ECC, the encapsulated data includes packet header error detection and correction code HECC;

Decapsulating the data containing ECC according to the HECC, and detecting the received data according to the ECC;

If there is an error in the received data, the data is corrected according to the parity bit of the ECC, and if the error correction of the data cannot be completed through the ECC, the data is requested through the preset error tolerance setting Retransmission.

In a first possible implementation manner, in combination with the second aspect, the decapsulating the data containing the ECC according to the HECC, and detecting the received data according to the ECC includes:

By decapsulating the HECC, it is determined that the received data is the data sent by the sending end;

Decapsulating the ECC in the received data, and checking the correctness of the received data according to the ECC.

In a second possible implementation manner, in combination with the second aspect, if the received data has an error, performing error correction through ECC includes:

If it is found that the received data has errors through the error detection operation, an error correction operation is performed according to the check bit of the ECC.

In the third possible implementation manner, in combination with the second aspect, if the error cannot be corrected through ECC, requesting data retransmission through fault-tolerant design includes:

When the error correction of the data cannot be completed through the check bit of the ECC, the sender is requested to retransmit the data through a preset error tolerance setting.

In a fourth aspect, a device for data transmission is provided, based on a sending node computer, the device includes:

a data acquisition unit, configured to acquire data to be transmitted, where the data to be transmitted includes the information of the sending target;

a target determining unit, configured to determine a sending target of the data to be transmitted according to the information of the sending target;

The data sending unit is configured to encapsulate a data packet header for the data to be transmitted, calculate an error detection and correction code (ECC) for the data packet header, and send the data with the data packet header ECC.

In a first possible implementation manner, with reference to the third aspect, the data sending unit includes:

A packet header encapsulation unit, configured to encapsulate a data packet header for the data to be transmitted when the data to be transmitted needs to be sent to a remote computer, and calculate the ECC of the data packet header;

A data sending unit, configured to send data including the ECC of the data packet header.

In a fifth aspect, a device for data transmission is provided, the device comprising:

The forwarding unit is configured to, when the forwarding node receives the data packet header with ECC, if the forwarding destination node has a data packet capable of storing the data packet header, then directly forward the data packet.

In a sixth aspect, a device for data transmission is provided, the device comprising:

The data receiving unit is used to receive the data including the error detection and correction code ECC after encapsulation, and the data after the encapsulation includes the data packet header error detection and error correction code HECC;

a data detection unit, configured to decapsulate the data containing ECC according to the HECC, and detect the received data according to the ECC;

An error processing unit, if there is an error in the received data, then correct the data according to the parity bit of the ECC, if the error correction of the data cannot be completed through the ECC, then use the preset error tolerance setting Make sure to retransmit the requested data.

In a first possible implementation manner, with reference to the fourth aspect, the data detection unit is configured to:

By decapsulating the HECC, it is determined that the received data is the data sent by the sending end;

Decapsulating the ECC in the received data, and checking the correctness of the received data according to the ECC.

In a second possible implementation manner, in combination with the fourth aspect, the error handling unit is configured to:

If it is found that the received data has errors through the error detection operation, an error correction operation is performed according to the check bit of the ECC.

In a third possible implementation manner, in combination with the fourth aspect, the error handling unit is further configured to:

When the error correction of the data cannot be completed through the check bit of the ECC, the sender is requested to retransmit the data through a preset error tolerance setting.

In a seventh aspect, a system for data transmission is provided, and the system includes;

The sending end as described in the first aspect and the fourth aspect;

The forwarding unit as described in the second aspect and the fifth aspect;

The receiving end as described in the third aspect and the sixth aspect.

Embodiments of the present invention provide a method, device, and system for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and according to the information of the sending target, the sending target is determined; it is the data to be transmitted Encapsulate the data packet header, and calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and When there is an error, the data is corrected according to the parity bit of the error detection and error correction code. If the error correction of the data cannot be completed through the error detection and error correction code, then the preset Request data retransmission with fault-tolerant settings. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of a data transmission method provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a data transmission method provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a data transmission method provided by an embodiment of the present invention;

Fig. 4 is a comparison diagram of data packet formats before and after encapsulation provided by the embodiment of the present invention;

Fig. 5 is the specific content in the communication packet of the PCI-E bus before the data packet format that the embodiment of the present invention provides;

Fig. 6 is the specific content in the communication packet of the PCI-E bus after the data packet format that the embodiment of the present invention provides;

FIG. 7 is a schematic diagram of a data transmission method provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a data transmission method provided by an embodiment of the present invention;

FIG. 9 is a schematic diagram of a specific method for data transmission provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a device for data transmission according to another embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a data transmission device according to another embodiment of the present invention;

FIG. 14 is a schematic diagram of a data transmission system provided by an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a device for data transmission provided by an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a device for data transmission provided by an embodiment of the present invention;

FIG. 17 is a schematic structural diagram of a device for data transmission provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

An embodiment of the present invention provides a method for data transmission, as shown in Figure 1, the method includes:

101. Acquire data to be transmitted, where the data to be transmitted includes information about a sending target.

102. Determine a sending destination of the data to be transmitted according to the information about the sending destination.

103. Encapsulate a data packet header for the data to be transmitted, calculate an error detection and correction code (ECC) for the data packet header, and send data with the data packet header ECC.

Correspondingly, the embodiment of the present invention provides a data transmission method, as shown in FIG. 2, the method includes:

201. Receive encapsulated data including an error detection and correction code ECC, where the encapsulated data includes a data packet header error detection and correction code HECC.

202. Decapsulate the data containing the ECC according to the HECC, and detect the received data according to the ECC.

203. If there is an error in the received data, perform error correction on the data according to the parity bit of the ECC, and if the error correction on the data cannot be completed through the ECC, perform error correction through the preset error tolerance setting Request data retransmission.

An embodiment of the present invention provides a data transmission method. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present invention, a method for data transmission provided by the embodiments of the present invention will be described in detail below through specific embodiments. The method includes:

301. Acquire data to be transmitted, where the data to be transmitted includes information about a sending target.

302. Determine a sending destination of the data to be transmitted according to the information about the sending destination.

303. Encapsulate a data packet header for the data to be transmitted, calculate an error detection and correction code (ECC) for the data packet header, and send data with the data packet header ECC.

Wherein, as shown in FIG. 3, step 303 specifically includes:

3031. When the data to be transmitted needs to be sent to a remote computer, encapsulate a data packet header for the data to be transmitted, and calculate the ECC of the data packet header.

3032. Send the data including the ECC of the data packet header.

Specifically, the comparison between the original data packet format when using CRC and the modified data packet after encapsulating HECC is shown in Figure 4. It can be clearly seen in Figure 4 that compared with the original data packet using CRC, the modified The HECC part is added before the ECC-protected data in the data packet, so that when receiving, the encapsulation format of the data packet can be identified first through the HECC part to ensure correct reading of the data in the ECC-protected part of the data packet.

In Figure 4, the function of the serial number part is to check whether there is packet loss in the point-to-point transmission of the data packet, and if there is a packet loss phenomenon in the transmission process, the point-to-point data retransmission is activated;

Exemplarily, the process of modifying the data packet format is shown in Fig. 5 and Fig. 6 .

In FIG. 5 , it shows the specific content in the communication data packet of the PCI-E bus before the data packet format is modified.

Correspondingly, in Figure 6, it is the PCI-E bus data packet after adding the ECC protection field. It can be clearly seen that the header protection field is added in the shaded area. When the value in the header protection field is 11 , indicating that the data packet header needs to be protected. Specifically, the DW ECC field in the shaded part is added to the data packet.

The specific implementation of this step is:

If the data to be transmitted is sent to the remote node computer, the data to be transmitted is not unpacked, and the data to be transmitted is directly sent to the sending port;

If the data to be transmitted is sent to other modules of the node computer itself, the data to be transmitted is decapsulated and then sent to the cache, so as to send the data to be transmitted to the other modules.

Further, if the data to be transmitted is sent to a remote node computer, directly sending the data to be transmitted to the sending port without decapsulating the data to be transmitted includes:

If the data to be transmitted is sent to the remote node computer, then

Send the data to be transmitted to a sending port.

If the data to be transmitted is sent to other modules of the node computer itself, after the data to be transmitted is decapsulated, it is sent to the cache, so that sending the data to be transmitted to the other modules includes:

If the data to be transmitted is sent to other modules of the node computer itself, then

Unpack the ECC in the data to be transmitted, and obtain the unpacked data;

The decapsulated data is sent to the cache of the node computer, and then sent to other modules of the node computer itself.

Further, the data to be transmitted is encapsulated, and after calculating the ECC, sending the data to be transmitted includes:

calculating ECC for the packet header of the data to be transmitted;

Encapsulate the data to be transmitted, and send the encapsulated data.

An embodiment of the present invention provides a method for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

An embodiment of the present invention provides a data transmission method, the method comprising:

401. Receive encapsulated data that includes an error detection and correction code ECC, where the encapsulated data includes a header error detection and correction code HECC.

402. Decapsulate the data containing the ECC according to the HECC, and detect the received data according to the ECC.

403. If there is an error in the received data, perform error correction on the data according to the parity bit of the ECC, and if the error correction on the data cannot be completed through the ECC, perform error correction through the preset error tolerance setting Request data retransmission.

Wherein, as shown in FIG. 7, step 402 includes:

4021. Determine that the received data is data sent by the sender by decapsulating the HECC.

4022. Decapsulate the ECC in the received data, and check the correctness of the data according to the ECC.

As shown in Figure 8, step 403 includes:

4031. If it is found that the received data has an error through an error detection operation, perform an error correction operation according to the check bit of the ECC.

4032. When the error correction of the data cannot be completed through the check bit of the ECC, request data retransmission from the sender through a preset error tolerance setting.

Exemplarily, according to the above steps, the process of performing a complete data transmission can be represented by the following embodiment, and the specific steps are shown in Figure 9:

501. Receive a data request sent by another module of the local computer or a remote computer, so that the memory controller reads data containing ECC from the ECC memory, and the data containing ECC includes information of a sending target.

502. The memory controller judges a processing manner for the data containing ECC according to the information of the sending destination.

503. When the sending target is other modules of the local computer, unpack the ECC-containing data in the memory controller, and store the unpacked data in the shared cache or system memory, so that The corresponding modules directly obtain the required data.

504. When the sending target is another remote computer, send the data containing ECC to the sending port, encapsulate the data packet header in the sending port, and add ECC to the data packet header in the ECC generator in the sending port, Finally, the data encapsulated with the ECC header is sent to the corresponding remote computer.

505. After receiving the data packet sent by the sending end, the receiving port of the remote computer decapsulates the data containing the ECC of the data packet header in the ECC generator of the receiving port.

506. Perform data verification according to the ECC in the unpacked data, and perform error correction according to the data in the ECC when an error is found.

507. When error correction cannot be performed according to the data in the ECC, send a data retransmission request to the data sending end, so as to retrieve the data.

An embodiment of the present invention provides a method for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

An embodiment of the present invention provides a data transmission device 01, as shown in Figure 10, the device 01 includes:

The data acquiring unit 011 is configured to acquire data to be transmitted, where the data to be transmitted includes the information of the sending target.

The target determining unit 012 is configured to determine the sending target of the data to be transmitted according to the information of the sending target.

The data sending unit 013 is configured to encapsulate a data packet header for the data to be transmitted, calculate an error detection and correction code (ECC) for the data packet header, and send the data with the data packet header ECC.

Wherein, as shown in Figure 11, the data sending unit 013 includes:

A packet header encapsulation unit 0131, configured to encapsulate a data packet header for the data to be transmitted when the data to be transmitted needs to be sent to a remote computer, and calculate the ECC of the data packet header.

A data sending unit 0132, configured to send data including the ECC of the data packet header.

An embodiment of the present invention provides a device for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

An embodiment of the present invention provides a data transmission device 02, as shown in Figure 12, the device 02 includes:

The forwarding unit 021 is configured to directly forward the data packet when the forwarding node receives the data packet header with ECC and if the forwarding destination node has a data packet capable of storing the data packet header.

An embodiment of the present invention provides a device for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

The embodiment of the present invention provides a data transmission device 03, as shown in Figure 13, the device 03 includes:

The data receiving unit 031 is configured to receive encapsulated data including an error detection and correction code ECC, and the encapsulated data includes an error detection and correction code HECC of a data packet header.

The data detection unit 032 is configured to decapsulate the data containing the ECC according to the HECC, and detect the received data according to the ECC.

The error processing unit 033, if there is an error in the received data, then perform error correction on the data according to the parity bit of the ECC, if the error correction to the data cannot be completed through the ECC, then use the preset error tolerance Set to request data retransmission.

Wherein, the data detection unit 032 is used for:

By decapsulating the HECC, it is determined that the received data is the data sent by the sending end;

Decapsulating the ECC in the received data, and checking the correctness of the received data according to the ECC.

Further, the error handling unit 033 is used for:

If it is found that the received data has errors through the error detection operation, an error correction operation is performed according to the check bit of the ECC.

The error handling unit 033 is also used for:

When the error correction of the data cannot be completed through the check bit of the ECC, the sender is requested to retransmit the data through a preset error tolerance setting.

An embodiment of the present invention provides a device for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating a data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

The embodiment of the present invention also provides a data transmission system 04, as shown in Figure 14, the system includes:

Such as the sending end 041 described in the device 01 in the embodiment.

Forwarding unit 042 as described in device 02 in the embodiment.

The receiver 043 as described in the device 03 in the embodiment.

An embodiment of the present invention provides a system for data transmission. By acquiring the data to be transmitted, the data to be transmitted includes the information of the sending target, and determining the sending target according to the information of the sending target; encapsulating the data packet header for the data to be transmitted, And calculate the error detection and correction code for the data packet header, and send the data with the data packet header; when receiving the data, receive the encapsulated data, decapsulate the data containing the error detection and error correction code, and detect the received data , when there is an error, the data is corrected according to the parity bit of the error detection and error correction code, if the error correction of the data cannot be completed through the error detection and error correction code, then the preset error tolerance setting Perform request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

The embodiment of the present invention also provides a device 05 for data transmission. As shown in FIG. The memory 053 is used to store instructions, and the processor 052 is used to obtain data to be transmitted, and the data to be transmitted includes the information of the sending target; the processor 052 is used to determine the data to be transmitted according to the information of the sending target The sending target of the data; the processor 052 is used for encapsulating a data packet header for the data to be transmitted, and calculating an error detection and correction code (ECC) for the data packet header, and sending the data with the data packet header ECC.

In the embodiment of the present invention, optionally, the processor executes the instruction to encapsulate a data packet header for the data to be transmitted, and calculate an ECC for the data packet header, and sending the data with the data packet header ECC includes:

When the data to be transmitted needs to be sent to a remote computer, encapsulate the data packet header for the data to be transmitted, and calculate the ECC of the data packet header;

Send the data including the ECC of the data packet header.

Therefore, the device for data transmission in the embodiment of the present invention obtains the data to be transmitted, the data to be transmitted includes the information of the sending target, and determines the sending target according to the information of the sending target; encapsulates the data packet header for the data to be transmitted, and calculating an error detection and correction code for the data packet header, and sending the data with the data packet header; when receiving the data, receiving the encapsulated data, unpacking the data containing the error detection and error correction code, and detecting the received data, When there is an error, the data is corrected according to the parity bit of the error detection and error correction code. If the error correction of the data cannot be completed through the error detection and error correction code, then the error correction is performed through the preset error tolerance setting. Request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

The embodiment of the present invention also provides a device 06 for data transmission. As shown in FIG. The memory 063 is used for storing instructions, and the processor 062 is used for when the forwarding node receives the data packet header with the error detection and correction code ECC, if the forwarding destination node has a data packet capable of storing the data packet header, Then the data packet is directly forwarded.

Therefore, the device for data transmission in the embodiment of the present invention obtains the data to be transmitted, the data to be transmitted includes the information of the sending target, and determines the sending target according to the information of the sending target; encapsulates the data packet header for the data to be transmitted, and calculating an error detection and correction code for the data packet header, and sending the data with the data packet header; when receiving the data, receiving the encapsulated data, unpacking the data containing the error detection and error correction code, and detecting the received data, When there is an error, the data is corrected according to the parity bit of the error detection and error correction code. If the error correction of the data cannot be completed through the error detection and error correction code, then the error correction is performed through the preset error tolerance setting. Request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

The embodiment of the present invention also provides a device 07 for data transmission. As shown in FIG. The memory 073 is used to store instructions, and the processor 072 is used to receive the data including the error detection and correction code ECC after packaging, and the data after the packaging includes the data packet header error detection and correction code HECC; The HECC decapsulates the data containing the ECC, and detects the received data according to the ECC; the processor 072 is configured to check the ECC according to the check bit of the ECC if there is an error in the received data Error correction is performed on the data, and if the error correction of the data cannot be completed through ECC, data retransmission is requested through a preset error tolerance setting.

In the embodiment of the present invention, optionally, the processor executes the instruction to decapsulate the data containing ECC according to the HECC, and detecting the received data according to the ECC includes:

By decapsulating the HECC, it is determined that the received data is the data sent by the sending end;

Decapsulating the ECC in the received data, and checking the correctness of the received data according to the ECC.

In the embodiment of the present invention, optionally, the processor executing the instruction is used to perform error correction through ECC if the received data has an error:

If it is found that the received data has errors through the error detection operation, an error correction operation is performed according to the check bit of the ECC.

In the embodiment of the present invention, optionally, the processor executes the instruction to request data retransmission through fault-tolerant design if the error cannot be corrected through ECC, including:

When the error correction of the data cannot be completed through the check bit of the ECC, the sender is requested to retransmit the data through a preset error tolerance setting.

Therefore, the device for data transmission in the embodiment of the present invention obtains the data to be transmitted, the data to be transmitted includes the information of the sending target, and determines the sending target according to the information of the sending target; encapsulates the data packet header for the data to be transmitted, and calculating an error detection and correction code for the data packet header, and sending the data with the data packet header; when receiving the data, receiving the encapsulated data, unpacking the data containing the error detection and error correction code, and detecting the received data, When there is an error, the data is corrected according to the parity bit of the error detection and error correction code. If the error correction of the data cannot be completed through the error detection and error correction code, then the error correction is performed through the preset error tolerance setting. Request data retransmission. The repeatability of data detection in link transmission can be reduced, the link transmission overhead caused by retransmission can be reduced, and the working efficiency of the system can be improved.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), magnetic disk or optical disk, etc., which can store program codes. medium.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (15)

1. a kind of data transmission method, which is characterized in that the method includes：

Data to be transmitted are obtained, the data to be transmitted include to send the information of target；The data to be transmitted be from The data containing ECC read in ECC memories；

According to the information for sending target, the transmission target of the data to be transmitted is determined；

It is the data encapsulation of data to be transmitted packet header, and be described when the transmission target is other remote computers Data packet head calculates error detection and correction code ECC, sends the data with data packet head ECC.

2. according to the method described in claim 1, it is characterized in that, it is described be the data encapsulation of data to be transmitted packet header, And ECC is calculated for the data packet head, sending the data with data packet head ECC includes：

It is the data encapsulation of data to be transmitted packet header when the data to be transmitted need to be sent to remote computer, And calculate the data packet head ECC；

Transmission includes the data of the data packet head ECC.

3. a kind of method of data transmission, which is characterized in that the method includes：

When forward node receives the data packet head with error detection and correction code ECC, if the destination node of forwarding has and can store When the data packet of the data packet head, then the data packet is directly forwarded.

4. a kind of method of data transmission, which is characterized in that the method includes：

The data for including error detection and correction code ECC after encapsulating are received, the data after the encapsulation include data packet head error detection and correction code HECC；

The data containing ECC are unsealed according to the HECC, and the data of the reception are detected according to the ECC；

If there are mistakes for the data of the reception, error correction is carried out to the data according to the check bit of the ECC, if passing through ECC cannot complete the error correction to the data, then fault-tolerant be set for request data retransmission by preset.

5. according to the method described in claim 4, it is characterized in that, described unseal the number containing ECC according to the HECC According to, and according to the ECC to the data of the reception be detected including：

By unsealing the HECC, the data received described in determination are the data that transmitting terminal is sent；

The ECC in the data of the reception is unsealed, and the correctness of the data received is examined according to the ECC It surveys.

If 6. according to the method described in claim 4, it is characterized in that, the data of the reception there are mistakes, pass through ECC carries out error correction：

If obtaining the data of the reception by error detection operation there are mistakes to carry out error correction operation according to the check bit of ECC.

If 7. according to the method described in claim 4, it is characterized in that, it is described by ECC cannot complete correct mistake, pass through Fault-tolerant design request data retransmission includes：

When the check bit by the ECC cannot complete the error correction of the data, then by preset fault-tolerant setting, to transmitting terminal Request data retransmission.

8. a kind of device of data transmission, which is characterized in that described device includes：

Data capture unit, for obtaining data to be transmitted, the data to be transmitted include to send the information of target；It is described Data to be transmitted are the data containing ECC read from ECC memories；

Target determination unit, for according to the information for sending target, determining the transmission target of the data to be transmitted；

Data transmission unit, for when the transmission target is other remote computers, being encapsulated for the data to be transmitted Data packet head, and error detection and correction code ECC is calculated for the data packet head, send the data with data packet head ECC.

9. device according to claim 8, which is characterized in that the data transmission unit includes：

Packet header encapsulation unit, for when the data to be transmitted need to be sent to remote computer, being described to be transmitted Data encapsulation of data packet header, and calculate the data packet head ECC；

Data transmission unit, for send include the data packet head ECC data.

10. a kind of device of data transmission, which is characterized in that described device includes：

Retransmission unit, when for receiving the data packet head with ECC when forward node, if the destination node of forwarding has and can deposit When storing up the data packet of the data packet head, then the data packet is directly forwarded.

11. a kind of device of data transmission, which is characterized in that described device includes：

Data receipt unit, is used to receive the data for including error detection and correction code ECC after encapsulating, and the data after the encapsulation include number According to packet header error detection and correction code HECC；

Data detecting unit for unsealing the data containing ECC according to the HECC, and connects according to the ECC to described The data of receipts are detected；

Error handling unit carries out the data according to the check bit of the ECC if there are mistakes for the data of the reception Error correction fault-tolerant is set for request data retransmission if cannot complete the error correction to the data by ECC by preset.

12. according to the devices described in claim 11, which is characterized in that the data detecting unit is used for：

By unsealing the HECC, the data received described in determination are the data that transmitting terminal is sent；

The ECC in the data of the reception is unsealed, and the correctness of the data received is examined according to the ECC It surveys.

13. according to the devices described in claim 11, which is characterized in that the error handling unit is used for：

If obtaining the data of the reception by error detection operation there are mistakes to carry out error correction operation according to the check bit of ECC.

14. according to the devices described in claim 11, which is characterized in that the error handling unit is additionally operable to：

When the check bit by the ECC cannot complete the error correction of the data, then by preset fault-tolerant setting, to transmitting terminal Request data retransmission.

15. a kind of system of data transmission, which is characterized in that the system comprises：

Such as the device of claim 8 to 9 any one of them data transmission；

The device of data transmission as claimed in claim 10；

Such as the device of claim 11 to 14 any one of them data transmission.