WO2013091536A1

WO2013091536A1 - Data transmission method, relevant node and system based on multi-channel

Info

Publication number: WO2013091536A1
Application number: PCT/CN2012/086912
Authority: WO
Inventors: 李强; 俞柏峰; 赵俊峰; 黄平; 谭海波
Original assignee: 华为技术有限公司
Priority date: 2011-12-19
Filing date: 2012-12-19
Publication date: 2013-06-27
Also published as: CN102567276A; CN102567276B

Abstract

A data transmission method, relevant node and system based on multi-channel. The data transmission method based on multi-channel includes: a receiving node receiving data frames from a sending node synchronously from at least two channels; comparing whether the data in the at least two received data frames are consistent; if there are data frames with consistent data, then performing CRC check on the data frames with consistent data; and if there are no data frames with consistent data, then performing CRC check on all the data frames which undergo comparison currently; if there are data frames with correct CRC check, then transmitting one data frame with correct CRC check in a first in first out (FIFO) queue; and returning to the sending node acknowledgement information which indicates that the receiving of the data frame is correct. The data transmission method, relevant node and system can effectively improve the stability of communication systems.

Description

Multi-channel based data transmission method, related node and system The application is submitted to the Chinese Patent Office on December 19, 2011, the application number is 201110426422.1, and the invention name is "multi-channel based data transmission method, related nodes and systems" Priority of Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communications, and in particular, to a multi-channel based data transmission method, related nodes and systems.

Background technique

With the advent of the world's first computer in 1946, computer technology spanned the era of e-tubes, transistors, integrated circuits, and ultra-large-scale integrated circuits. With the advancement of computer technology, people have put forward the performance of processor systems. Symmetric multiprocessing structure

(SMP, Symmetric Multiprocessing), system architecture such as cluster system, Massively Parallel Processing (MPP), and Cache-Coherent Non-Uniform Memory Architecture (CC-NUMA).

These architectures are implemented by multiple chassis interconnected by a backplane or cable to form a large machine rejection group. The traces in the backplane or cable not only transmit the data information required by the program, but also need to transmit real-time control signals. These control signals are critical to real-time and timing requirements. Regardless of the system architecture used, hot machine backup is usually used to ensure the control signal transmission between nodes and nodes. The same signal is transmitted through different cables. When the main cable fails, it switches to the backup cable. However, the hot machine backup In the process of handover, it is easy to cause loss of transmission data. At the same time, the Cyclic Redundancy Check (CRC) protocol will cause too many data retransmissions, making the data real-time and time-series not strong, which leads to the communication system. Unstable.

Summary of the invention

Embodiments of the present invention provide a multi-channel based data transmission method, a related node, and a system for improving stability of a communication system. To solve the above technical problem, the embodiment of the present invention provides the following technical solutions:

A multi-channel based data transmission method, comprising:

The receiving node synchronously receives the data frame from the sending node from the at least two channels, where the data frame carries the cyclic redundancy check code CRC, and the data frames transmitted on the at least two channels are the same data frame. ; Comparing whether data in at least two of the above received data frames is consistent;

If there is a data frame with the same data, the data frame with the same data is CRC checked; if there is no data frame with the same data, the CRC check is performed on all the data frames that are currently compared.

If there is a data frame with the correct CRC check, then:

A data frame having the correct CRC check is transmitted to the FIFO in the FIFO; and an acknowledgement indicating that the data frame is received without error is returned to the transmitting node.

A receiving node includes:

a receiving unit, configured to synchronously receive data frames from the sending node from the at least two channels, where the data frame carries a cyclic redundancy check code CRC, and the data frames transmitted on the at least two channels are the same a data frame;

a comparison unit, configured to compare whether data of the at least two received data frames is consistent; and a CRC check unit, configured to: when the comparing unit compares data frames with data consistency, perform data frames that are consistent with the data CRC check; when the comparing unit compares the data frame with no data consistency, performs CRC check on all data frames currently compared by the comparing unit; and the transmitting unit is configured to: when there is a data frame with the correct CRC check Transmitting, to the first-in first-out queue FIFO, a data frame with the correct CRC check;

And a feedback unit, configured to: when the transmitting unit triggers, return to the sending node, the confirmation information indicating that the data frame is received without errors.

A cross-node interconnect system, including:

a sending node and a receiving node;

The sending node is configured to send the same data frame to the receiving node from the at least two channels; the receiving node is configured to synchronously receive the data frame from the sending node from the at least two channels, where the data frame carries a loop a redundancy check code CRC, and the data frames transmitted on the at least two channels are the same data frame;

Comparing whether data in at least two of the above received data frames is consistent;

If there is a data frame with the correct CRC check, then: Transmitting a data frame with the correct CRC check to the first-in first-out queue FIFO; and returning confirmation information indicating that the data frame is received without error to the transmitting node.

It can be seen that, in the embodiment of the present invention, multiple channels are used to transmit the same data, and the receiving node synchronously receives data from multiple channels, thereby avoiding receiving the cable in a single channel when the cable is slack or partially severely interfered. The node cannot receive the system defect or the service interruption caused by the data frame transmitted by the sending node in real time, and on the other hand, avoids the problem that the transmission data is easily lost during the hot-machine backup switching process; in addition, the receiving in the present invention The node compares and analyzes the data in the received data frames on the multiple channels, and when there is a data frame that is correct in the analysis processing result, the acknowledgment information indicating that the data frame is received correctly is returned to the sending node, thereby avoiding the existing information. In the technology, as long as the CRC check error of one data frame requires the sending node to retransmit the data frame, the number of retransmitted data frames is greatly reduced, and the real-time and timing of the data is improved. In summary, the technical solution provided by the present invention effectively improves the stability of the communication system. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic flow chart of an embodiment of a multi-channel based data transmission method provided by the present invention;

2 is a schematic flow chart of another embodiment of a multi-channel based data transmission method provided by the present invention;

3 is a schematic structural diagram of an embodiment of a receiving node according to the present invention;

FIG. 4 is a schematic structural diagram of an embodiment of a cross-node interconnection system according to the present invention. detailed description

Embodiments of the present invention provide a multi-channel based data transmission method, a related node, and a system. In order to make the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments are merely a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The multi-channel based data transmission method provided by the embodiment of the present invention is described below. Referring to FIG. 1 , an embodiment of the multi-channel based data transmission method provided by the present invention includes:

The receiving node synchronously receives the data frame from the sending node from the at least two channels. In the embodiment of the present invention, at least two cables are connected between the sending node and the receiving node to form at least two pieces for transmitting the same data. The channel sends a data frame carrying a Cyclic Redundancy Check (CRC) to the receiving node through at least two channels formed by the sending node, where the data frames transmitted on each channel are the same data frame. The data frame of the sending node, where the synchronization code is a custom special character, used to indicate the sending start time of the data frame. In the embodiment of the present invention, when the receiving of the data frame is completed from the channel, the data frame is stored in the packet data register, and the flag tag corresponding to the channel may be set, wherein the flag flag and the channel --correspond.

The receiving node compares whether the data in the at least two received data frames are consistent. In the embodiment of the present invention, the receiving node may perform the data frame that is currently received after completing the receiving of the data frame from all channels. For comparison, if the receiving node synchronously receives the same data frame from the four channels in step 101, the receiving node may compare the four data frames after the four data frames are received, or the receiving node may also After the reception of the data frame is completed from the majority of channels (for example, when most flag tags are set), the received data frames are extracted for comparison, for example, a threshold value greater than 2 may be preset according to the current channel number. When the number of identical data frames that have been received exceeds the threshold, the currently received data frames are compared. In a practical application, the data frame on the cable channel cannot be transmitted to the receiving node due to the problem that the cable may be slack or interfered with. Therefore, in the embodiment of the present invention, a waiting time of a certain duration may be preset. After the timing exceeds the waiting time, the currently received data frame is compared, and the timing may be triggered when the receiving node starts receiving the data frame, or may also be triggered after the receiving node completes receiving a data frame, or may also Timing is triggered at other times. Of course, depending on the timing trigger point, the preset duration will also be different.

When there is a data frame with consistent data, step 103 is performed;

When there is no data frame with consistent data, step 104 is performed.

103. Perform a CRC check on the data frame with consistent data;

The receiving node performs CRC check on the data frame with consistent data. Further, the receiving node can Data frames with inconsistent data are discarded.

When there is a data frame with the correct CRC check, step 105 is performed.

In an application scenario, when the CRC check of the data frame with the same data is not correct, all the received data frames may be discarded. In another application scenario, in order to avoid CRC check. In the process, an error calculation is generated, and a certain value may be preset. When the number of data frames in which the data is consistent exceeds the value, one of the data frames is transmitted to the first input first output (FIFO).

104. Perform CRC check on all data frames currently being compared;

When the data of all the data frames to be compared in step 102 are inconsistent, all the data frames currently being compared are subjected to CRC check.

When there is a data frame with the correct CRC check, step 105 is performed.

When there is no data frame with the correct CRC check, that is, if the CRC check of all the data frames to be compared is not correct, all the data frames to be compared can be discarded.

105. Send a data frame with a correct CRC check to the FIFO;

The receiving node transmits one of the data frames with the correct CRC check to FIF0.

106. Return, to the sending node, confirmation information indicating that the data frame is received without errors;

The receiving node returns an acknowledgement (e.g., ACK information) indicating that the data frame is received without error to the transmitting node.

Further, the receiving node may further calculate the remaining space of the current FIFO after step 105, and the calculation of the remaining space of the FIFO may be implemented by the following formula:

Remaining space of FIFO = number of registers of FIF0 - number of data received by FIFO.

And, after calculating the remaining space of the FIFO, carrying the storage identifier in the confirmation information, where the storage identifier is used to indicate the remaining space of the FIFO, such as being definable, when the value of the storage identifier is 1, indicating that the FIFO has The remaining space, when the value of the storage identifier is 0, indicates that the FIFO is full. Therefore, when the sending node receives the acknowledgment information carrying the storage identifier, it can learn the storage status of the current FIFO of the receiving node, and stop transmitting the data frame to the receiving node when the current FIFO of the receiving node is full.

The data frame transmitted in the embodiment of the present invention may be a control signal (such as a reset signal, a system error signal, etc.), or the data frame may be a data frame carrying the service data, which is not limited herein.

It can be seen that, in the embodiment of the present invention, multiple channels are used to transmit the same data, and the receiving node synchronously receives data from multiple channels, thereby avoiding looseness or partial strictness of the cable in a single channel. In the case of heavy interference, the receiving node cannot receive the system or the service interruption caused by the data frame transmitted by the transmitting node in real time, and on the other hand, avoids the problem that the transmission data is easily lost during the hot-machine backup switching process; In addition, in the present invention, the receiving node performs comparative analysis processing on the data in the received data frames on the plurality of channels, and when there is a data frame in which the comparison analysis processing result is correct, that is, returning to the transmitting node, indicating that the data frame is received without errors. The information avoids the disadvantages of requiring the transmitting node to retransmit the data frame as long as the CRC check error of one data frame in the prior art, greatly reducing the number of times of retransmitting the data frame, and improving the real-time and timing of the data. In summary, the technical solution provided by the present invention effectively improves the stability of the communication system. A multi-channel based data transmission method according to an embodiment of the present invention is described below. Referring to FIG. 2, another embodiment of a multi-channel based data transmission method in the present invention includes:

The receiving node synchronously receives the data frame from the sending node from the at least two channels. In the embodiment of the present invention, at least two cables are connected between the sending node and the receiving node to form at least two pieces for transmitting the same data. The channel, the sending node sends the data frame carrying the CRC to the receiving node by using at least two channels formed, wherein the data frames transmitted on each channel are the same data frame. The data frame of the sending node, the above synchronization code is a custom special character, which is used to indicate the sending start time of the data frame. In the embodiment of the present invention, when the receiving of the data frame is completed from the channel, the data frame is stored in the packet data register, and the flag tag corresponding to the channel may be set, where the flag flag and the channel are --correspond.

202. Determine whether the number of received data frames exceeds a preset first threshold. In the embodiment of the present invention, a first threshold value greater than 2 is preset, and when the received data frame is received, When the number exceeds the first threshold, step 203 is performed. When the preset first threshold is not exceeded, step 206 is performed.

203. The receiving node compares whether the data in the currently received data frame is consistent.

If there is a data frame with consistent data, step 204 is performed;

If the data in the currently received data frame is inconsistent, step 205 is performed.

204. Perform a CRC check on the data frame that is consistent with the foregoing data.

If there is a data frame with the correct CRC check, step 208 is performed; If the CRC check of the data frame with the same data is not correct, step 207 is performed.

205. Perform CRC check on all data frames that are currently compared;

If there is a data frame with the correct CRC check, step 208 is performed;

If the CRC check of all the data frames currently compared is not correct, step 212 is performed.

206, determining whether the waiting time exceeds the preset duration, if yes, executing step 203, if not, executing step 202;

The receiving node may trigger timing when starting to receive the data frame, or may trigger timing after receiving a data frame, or may trigger timing from other moments. Of course, according to different timing trigger points, The duration of the set will also be different.

207. Determine whether the number of data frames that are consistent with the data exceeds a preset second threshold. When the number of data frames that are consistent with the data exceeds a preset second threshold, perform step 209. When the number of data frames consistent with the data does not exceed the preset second threshold, step 212 is performed.

208. Send a data frame with a correct CRC check to the FIFO.

The receiving node transmits one of the data frames with the correct CRC check to the FIFO.

209. Send a data frame with consistent data to the FIFO.

The receiving node transmits one of the data frames with the same data to the FIFO.

210. Calculate a remaining space of the current FIFO;

Among them, the calculation of the remaining space of the FIFO can be realized by the following formula:

The remaining space of the FIFO The number of registers in the FIFO - The number of times the data is received by the FIFO.

211. Return, to the sending node, confirmation information indicating that the data frame is received without errors;

The receiving node returns an acknowledgement (e.g., ACK information) indicating that the data frame is received without error to the transmitting node. The acknowledgment information carries a storage identifier, where the storage identifier is used to indicate the remaining space of the FIFO. For example, it can be defined that when the value of the storage identifier is 1, it indicates that the FIFO has a remaining space, and when the value of the storage identifier is 0 means the FIFO is full. Therefore, when the sending node receives the acknowledgment information carrying the storage identifier, the sending node can learn the storage status of the current FIFO of the receiving node, and stop sending the data frame to the receiving node when the receiving node is full FIFO.

212. Return a retransmission indication information to the sending node.

The receiving node returns retransmission indication information (such as NAK information) to the transmitting node, instructing the transmitting node to resend the data frame. It can be seen that, in the embodiment of the present invention, multiple channels are used to transmit the same data, and the receiving node synchronously receives data from multiple channels, thereby avoiding receiving the cable in a single channel when the cable is slack or partially severely interfered. The node cannot receive the system defect or the service interruption caused by the data frame transmitted by the sending node in real time, and on the other hand, avoids the problem that the transmission data is easily lost during the hot-machine backup switching process; in addition, the receiving in the present invention The node compares and analyzes the data in the received data frames on the multiple channels, and when there is a data frame that is correct in the analysis processing result, the acknowledgment information indicating that the data frame is received correctly is returned to the sending node, thereby avoiding the existing information. In the technology, as long as the CRC check error of one data frame requires the sending node to retransmit the data frame, the number of retransmitted data frames is greatly reduced, and the real-time and timing of the data is improved. In summary, the technical solution provided by the present invention effectively improves the stability of the communication system. A receiving node in the embodiment of the present invention is described below. Referring to FIG. 3, the receiving node 300 in the embodiment of the present invention includes:

The receiving unit 301 is configured to synchronously receive the data frame from the sending node from the at least two channels, where the data frame carries the CRC, and the data frames transmitted on the at least two channels are the same data frame; The data frame of the node, the above synchronization code is a custom special character, which is used to indicate the sending start time of the data frame. In the embodiment of the present invention, when the receiving of the data frame is completed from the channel, the data frame is stored in the packet data register, and the flag tag corresponding to the channel may be set, where the flag flag and the channel are --correspond.

The comparing unit 302 is configured to compare whether the data in the completed data frame received by the at least two receiving units 301 is consistent;

In an application scenario, the comparing unit 302 may compare the currently received data frames after the receiving unit 301 completes receiving the data frame from all channels;

In another application scenario, the receiving node further includes: a first determining unit, configured to determine whether the number of received data frames exceeds a preset first threshold, where the first threshold is greater than 2 The comparing unit 302 may trigger when the first determining unit determines that the number of received data frames exceeds a preset first threshold, or the comparing unit 302 may determine that the receiving is completed in the first determining unit. When the number of data frames does not exceed the preset first threshold, it is triggered after waiting for the preset time. This is not a limitation. The comparing unit 302 is specifically configured to compare whether data in all currently received data frames is consistent.

The CRC check unit 303 is configured to perform CRC check on the data frame with the same data when the comparison unit 302 compares the data frames with the data consistency; when the comparison unit 302 compares the data frames with the same data, the comparison is performed. All data frames currently being compared by unit 302 are CRC checked.

The transmitting unit 304 is configured to: when there is a data frame with a correct CRC check, transmit a data frame with a correct CRC check to the FIFO;

The feedback unit 305 is configured to, when the transmitting unit 304 triggers, return an acknowledgement information (such as ACK information) indicating that the data frame is received without error.

In an application scenario, the feedback unit 305 is further configured to: when the CRC check unit 303 is incorrect in the CRC check result of the data frame, return the retransmission indication information to the sending node, where the retransmission indication information is used. Instructing the transmitting node to resend the data frame.

In another application scenario, the receiving node 300 further includes: a second determining unit, configured to determine, when the CRC check unit 303 does not correctly correct the CRC of the data frame that is consistent with the data, determine a data frame that is consistent with the data Whether the number exceeds the preset second threshold value; the transmitting unit 304 is further configured to: when the determination result of the second determining unit is YES, transmit one of the data frames that is consistent with the data to the FIFO; the feedback unit 305 is further configured to use the foregoing When the determination result of the second judging unit is no, or when the CRC check of all the data frames is not correct, the retransmission indication information is returned to the transmitting node.

In an application scenario, the receiving node 300 further includes: a calculating unit, configured to calculate a remaining space of the current FIFO; the acknowledgment information fed back by the feedback unit 305 carries a storage identifier, where the storage identifier is used to indicate that the receiving node 300 is currently The remaining space of the FIFO, so that the transmitting node can know the storage status of the current FIFO of the receiving node when receiving the acknowledgment information carrying the storage identifier, and stop transmitting the data frame to the receiving node when the current FIFO of the receiving node is full.

The confirmation information fed back by the feedback unit carries a storage identifier, wherein the storage identifier is used to indicate the remaining space of the FIFO.

It should be noted that the receiving node 300 in the embodiment of the present invention may be used as the receiving node in the foregoing method embodiment, and may be used to implement all the technical solutions in the foregoing method embodiments, and the functions of the respective functional modules may be according to the foregoing method embodiments. For a specific implementation, refer to the related description in the foregoing embodiments, and details are not described herein again.

It can be seen from the above that in the embodiment of the present invention, multiple channels are used to transmit the same data, and the receiving node is from multiple pieces. Synchronously receiving data on the channel avoids problems such as system failure or service interruption caused by the receiving node not receiving the data frame transmitted by the transmitting node in real time when the cable of the single channel is slack or partially severely interfered. On the other hand, the problem of loss of transmission data during the hot-machine backup switching process is also avoided. In addition, in the present invention, the receiving node compares and analyzes the data in the received data frames on multiple channels, and there is a comparative analysis. When the data frame with the correct result is processed, the acknowledgment information indicating that the data frame is received without error is returned to the sending node, which avoids the drawback of requiring the transmitting node to retransmit the data frame as long as the CRC check error of one data frame is wrong in the prior art. The number of retransmitted data frames is greatly reduced, and the real-time and timing of the data is improved. In summary, the technical solution provided by the present invention effectively improves the stability of the communication system. The embodiment of the invention further provides a cross-node interconnection system, as shown in FIG. 4, a cross-node interconnection system.

400 includes a sending node 401 and a receiving node 402. The sending node 401 is configured to send the same data frame from the at least two channels to the receiving node. Further, if the sending node 401 learns that the receiving node 402 is full, the current receiving FIFO stops receiving. The node 402 sends a data frame. The receiving node 402 can be the receiving node 300 in the foregoing device embodiment, and details are not described herein again.

It can be seen that in the cross-node interconnection system in the embodiment of the present invention, multiple channels are used to transmit the same data, and the receiving node synchronously receives data from multiple channels, thereby avoiding looseness or partiality of cables in a single channel. In the case of severe interference, the receiving node cannot receive the data frame transmitted by the transmitting node in real time and completely suffers from problems such as system failure or service interruption. On the other hand, it also avoids the problem that the transmission data is easily lost during the hot-machine backup switching process; In addition, in the present invention, the receiving node performs comparative analysis processing on the data in the received data frames on the plurality of channels, and when there is a data frame in which the comparison analysis processing result is correct, the returning to the transmitting node indicates that the data frame is received without errors. The information avoids the drawbacks of requiring the transmitting node to retransmit the data frame as long as the CRC check error of one data frame in the prior art, greatly reducing the number of times of retransmitting the data frame, and improving the real-time and timing of the data. In summary, the technical solution provided by the present invention effectively improves the stability of the communication system.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the device and the unit described above may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative, examples. For example, the division of the unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or may be integrated into another system, or some features may be ignored, or not. carried out. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. The components displayed by the unit may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

The multi-channel data transmission method, the related node and the system provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be a specific implementation manner and application range. The details of the description are not to be construed as limiting the invention.

Claims

Rights request

A multi-channel based data transmission method, comprising:

The receiving node synchronously receives the data frame from the sending node from the at least two channels, where the data frame carries a cyclic redundancy check code CRC, and the data frames transmitted on the at least two channels are the same a data frame;

Comparing whether data in at least two of the received data frames is consistent;

If there is a data frame with the same data, the data frame that is consistent with the data is subjected to a CRC check; if there is no data frame with the same data, the CRC check is performed on all the data frames currently performing the comparison;

If there is a data frame with the correct CRC check, then:

Transmitting one of the CRC-corrected data frames to the first-in first-out queue FIFO; and returning to the transmitting node an acknowledgement indicating that the data frame is received without errors.

2. The method of claim 1 wherein

After the transmitting the data frame with the correct CRC check to the first-in-first-out queue FIFO, the method includes: calculating a remaining space of the current FIFO;

The acknowledgment information carries a storage identifier, where the storage identifier is used to indicate a remaining space of the FIFO, so that the sending node stops at the location when the remaining space of the FIFO of the receiving node is zero. The receiving node sends a data frame.

3. A method according to claim 1 or 2, characterized in that

Before the comparing, whether the data in the data frame that is received by the two ends is consistent, the method includes: determining whether the number of the received data frames exceeds a preset first threshold, where the first door The limit is greater than 2;

If yes, performing the step of comparing whether the data in the at least two received data frames is consistent,

If not, the step of comparing whether the data in the data frame in which the at least two receptions are completed is consistent after waiting for the preset duration;

The comparing whether the data in the at least two received data frames is consistent is specifically: comparing whether data in all data frames that are currently received is consistent.

4. The method of claim 3, wherein

After comparing the data in the at least two received data frames that are consistent, the method includes: If the data frame that is consistent with the data or the CRC check of the data frame is not correct, returning retransmission indication information to the sending node, where the retransmission indication information is used to indicate that the sending node retransmits the The data frame.

5. The method of claim 3, wherein

After performing the CRC check on the data frame that is consistent with the data, the method includes:

If the CRC check of the data frame in which the data is consistent is not correct, determine whether the number of data frames that are consistent with the data exceeds a preset second threshold, and if yes, transmit a location to the FIFO. And the data frame that is consistent with the data, if not, returning retransmission indication information to the sending node, where the retransmission indication information is used to instruct the sending node to resend the data frame; if the CRC of all the data frames If the verification is not correct, the retransmission indication information is returned to the sending node.

6. A receiving node, comprising:

a receiving unit, configured to synchronously receive data frames from the sending node from the at least two channels, where the data frame carries a cyclic redundancy check code CRC, and the data transmitted on the at least two channels The frame is the same data frame;

a comparison unit, configured to compare whether data of the at least two received data frames is consistent; and a CRC check unit, configured to: when the comparing unit compares data frames with data consistency, the data is consistent The data frame is subjected to CRC check; when the comparing unit compares the data frame in which the data is consistent, the CRC check is performed on all the data frames currently compared by the comparing unit; and the transmitting unit is configured to: when the CRC is present When the correct data frame is verified, a data frame with the correct CRC check is transmitted to the first in first out queue FIFO;

And a feedback unit, configured to: when the transmitting unit triggers, return, to the sending node, confirmation information indicating that the data frame is received without errors.

7. The receiving node according to claim 6, wherein:

The receiving node further includes: a calculating unit, configured to calculate a remaining space of the current FIFO; the acknowledgement information fed back by the feedback unit carries a storage identifier, where the storage identifier is used to indicate the FIFO remaining space.

8. The receiving node according to claim 6 or 7, wherein

The receiving node further includes: a first determining unit, configured to determine whether the number of the received data frames exceeds a preset first threshold, where the first threshold is greater than 2;

The comparing unit triggers when the first determining unit determines that the number of the received data frames exceeds a preset first threshold, or determines that the receiving is completed in the first determining unit. When the number of data frames does not exceed the preset first threshold, it is triggered after waiting for the preset duration;

The comparing unit is specifically configured to compare whether data in all data frames that are currently received is consistent.

9. The receiving node of claim 8 wherein

The feedback unit is further configured to: when the data frame that is consistent with the data or the CRC check of the all data frames is incorrect, return retransmission indication information to the sending node, where the retransmission indication information is used to indicate The transmitting node retransmits the data frame.

10. The receiving node according to claim 8, wherein:

The receiving node further includes:

a second determining unit, configured to: when the CRC check of the data frame in which the data is consistent is not correct, determine whether the number of data frames that are consistent with the data exceeds a preset second threshold;

The transmitting unit is further configured to: when the determination result of the second determining unit is yes, transmit a data frame with the data consistency to the FIFO;

The feedback unit is further configured to: when the determination result of the second determining unit is negative, return retransmission indication information to the sending node, where the retransmission indication information is used to instruct the sending node to resend the data a frame; when the CRC check of all the data frames is incorrect, the retransmission indication information is returned to the sending node.

11. A cross-node interconnect system, comprising:

a sending node and a receiving node;

The sending node is configured to send the same data frame from the at least two channels to the receiving node; the receiving node is configured to synchronously receive data frames from the sending node from the at least two channels, where the data frame Carrying a cyclic redundancy check code CRC, and the data frames transmitted on the at least two channels are the same data frame;

If there is a data frame with consistent data, a CRC check is performed on the data frame that is consistent with the data; if there is no data frame with the same data, the CRC is performed on all data frames currently performing the comparison. check;

If there is a data frame with the correct CRC check, then: