WO2022193098A1

WO2022193098A1 - Data transmission method, communication device, and system

Info

Publication number: WO2022193098A1
Application number: PCT/CN2021/080868
Authority: WO
Inventors: 糟永明; 王晶; 杜思清; 宦卿; 张佳页
Original assignee: 华为技术有限公司
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-09-22
Also published as: CN117083820A

Abstract

A data transmission method, a communication device, and a system, which relate to the technical field of communications. The method comprises: when a state parameter of a channel between a first device and a second device satisfies a parameter condition corresponding to a target FEC encoding scheme, the first device encoding target data by using the target FEC encoding scheme to obtain first encoded data; and sending the first encoded data to the second device via the channel, wherein the target FEC encoding scheme is one of multiple FEC encoding schemes supported by the first device, and the first encoded data carries: an identifier used to indicate the target FEC encoding scheme. A first device can selectively use a target FEC encoding scheme to encode target data, and therefore a long delay and high overheads caused by always using the target FEC encoding scheme to encode data can be avoided. The present application is applicable to communication devices.

Description

Data transmission method, communication device and system

technical field

The present application relates to the field of communication technologies, and in particular, to a data transmission method, communication device and system.

Background technique

In the field of communication technology, the rate of data transmission between communication devices is getting higher and higher. In order to ensure the reliability of data transmission, the communication device needs to perform error correction on the data in the process of data transmission.

Usually, the sender (a certain communication device) and the receiver (another communication device) of the data perform error correction on the data based on forward error correction (Forward Error Correction, FEC) encoding and decoding. For example, the sender will use FEC coding to encode the data, and then send the encoded data to the receiver. After receiving the data, the receiving end will use FEC decoding to decode and correct the data.

However, using the FEC encoding and decoding method to encode and decode data will introduce a large delay and encoding overhead, and will increase the power consumption of the communication device.

SUMMARY OF THE INVENTION

The present application provides a data transmission method, a communication device and a system, which can solve the problems of high delay and encoding overhead in encoding and decoding data by using FEC encoding and decoding, and the power consumption of the communication device is large. The technical solution is as follows:

In a first aspect, a data transmission method is provided, and the data transmission method can be performed by a first device, and the first device supports a variety of forward error correction (Forward Error Correction, FEC) encoding methods, each of the FEC All coding methods have corresponding parameter conditions. The method includes: when the state parameter of the channel between the first device and the second device satisfies the parameter condition corresponding to the target FEC encoding mode, the first device encodes the target data by using the target FEC encoding mode to obtain the first encoded data , and send the first encoded data to the second device through the channel. Wherein, the target FEC encoding mode is one FEC encoding mode among multiple FEC encoding modes supported by the first device, and the first encoded data encoded by using the target FEC encoding mode carries: for indicating the target FEC encoding way identification.

In the data transmission method provided by this application, the first device supports multiple FEC coding modes, and for each FEC coding mode in the multiple FEC coding modes, the first device can use the channel state parameter and the FEC coding mode according to the channel state parameter. According to the parameter conditions corresponding to the mode, this FEC encoding mode is selectively used to encode the target data. Therefore, the first device may use the FEC encoding mode for encoding, or the first device may not use the FEC encoding mode for encoding. In this way, it is avoided that the first device always uses this FEC encoding method to encode, resulting in high data transmission delay and high power consumption of the communication device.

In addition, since the first encoded data carries an identifier for indicating the target FEC encoding mode, the first device does not need to send a message to the second device to notify the second device before sending the first encoded data to the second device The adopted encoding mode includes the target FEC encoding mode, so the communication complexity between the first device and the second device is reduced. In addition, no matter what encoding method the first device adopts for encoding, the second device only needs to use the corresponding decoding method to decode according to the identifier used to indicate the encoding method carried in the received encoded data. The way is simpler.

It should be noted that, when the state parameter satisfies the parameter conditions corresponding to at least two FEC encoding methods, the first device will use the at least two FEC encoding methods to encode different target data respectively, and send all the encoded data. to the second device. For example, the first device divides the data to be encoded into at least two pieces of target data, and the at least two pieces of target data are in one-to-one correspondence with the at least two FEC encoding modes. After that, the first device encodes a corresponding piece of target data by using each of the at least two FEC encoding modes.

In this application, the first device may use the multiple FEC encoding methods for encoding, the first device may also use some of the multiple FEC encoding methods for encoding, and the first device may not use the multiple FEC encoding methods. Encoding with FEC encoding. In this way, it is avoided that the first device always uses the multiple FEC encoding methods to encode, resulting in high data transmission delay and high power consumption of the communication device.

In addition, since the first device supports the FEC encoding mode in this application, the second device supports the decoding mode corresponding to the FEC encoding mode, and the FEC encoding mode and the decoding mode corresponding to the FEC encoding mode can implement error correction for multiple bits in the data. , therefore, the reliability of data transmission is high.

Further, in the present application, a target encoding mode may be selected from a variety of FEC encoding modes to encode the target data according to the state parameters of the channel. In this way, the target FEC encoding method used in the encoding can adapt to the state of the channel, so that different FEC encoding methods can be used to correct errors for the data according to different channel states, thereby weakening the errors in the process of channel transmission of data. .

Optionally, the codeword lengths of the multiple FEC encoding modes have a linear relationship. When the codeword lengths of multiple FEC coding modes have a linear relationship, the multiple FEC coding circuits corresponding to the multiple FEC coding modes may multiplex at least part of the structure, and the multiple FEC coding circuits corresponding to the multiple FEC coding modes The circuit may also reuse at least part of the structure, thereby reducing the size of the first device and the second device.

Optionally, the first device may not only support the above-mentioned multiple FEC encoding modes, but also support auxiliary encoding modes other than the multiple FEC encoding modes, and the second device may also support decoding modes corresponding to the auxiliary encoding modes. The first device may also use an auxiliary encoding mode to perform encoding, and the second device may use a decoding mode corresponding to the auxiliary encoding mode to perform decoding. In this case, the adoption of the FEC encoding method among the foregoing multiple FEC encoding methods is conditional, and the use of the auxiliary encoding method may be unconditional.

This application does not limit the types of auxiliary coding modes, and the auxiliary coding modes may include one coding mode or multiple coding modes. For example, the auxiliary encoding method includes: at least one of a Cyclic Redundancy Check (CRC) encoding method, an Error Correction Code (Error Correction Code, ECC) encoding method, and other FEC encoding methods, the other FEC encoding methods It is different from the above-mentioned various FEC encoding methods.

In an optional solution, before using the target FEC encoding method to encode the target data, the first device may use the auxiliary encoding method to encode the initial data to obtain the target data.

In another optional solution, after encoding the target data in the target FEC encoding manner, the first device may further encode the first encoded data in the auxiliary encoding manner to obtain the second encoded data ; At this time, the first device may send the second encoded data to the second device through the channel, so as to send the first encoded data to the second device through the channel.

In yet another optional solution, the method further includes: the first device encodes the auxiliary data by using the auxiliary encoding method to obtain third encoded data, and then sends the second device through the channel to the second device. third encoded data. It should be noted that both the target data and the auxiliary data are data to be coded, the difference is that the target data is coded using the above-mentioned target FEC coding method, and the auxiliary data is coded using the auxiliary coding method. It should be noted that both the target data and the auxiliary data are data to be coded, the difference is that the target data is coded using the above-mentioned target FEC coding method, and the auxiliary data is coded using the auxiliary coding method. It can be seen that the first device uses the target FEC encoding method to encode a part of data (eg, target data), and uses an auxiliary encoding method to encode another part of data (eg, auxiliary data). In this way, the transmission reliability of the part of the data is relatively high. In addition, when the data transmission delay caused by the auxiliary encoding method is smaller than the data transmission delay caused by the FEC encoding method, and the equipment power consumption caused by the auxiliary encoding method is also smaller than the equipment power consumption caused by the FEC encoding method, the other part The time delay and device power consumption caused by data encoding are small.

Optionally, the state parameters include: at least one of bit error rate, packet loss rate, insertion loss, return loss, channel noise, baud rate and data transmission rate. The state parameter may also have other implementation manners, which are not limited in this application.

Optionally, before the first device encodes the target data by using the target FEC encoding method, the first device may send test data to the second device through the channel, and at least some of the status parameters use to reflect the transmission of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application.

Optionally, the status parameter is used to indicate the transmission quality, and the parameter condition corresponding to the FEC encoding mode is used to indicate that the transmission quality is within the quality range corresponding to the FEC encoding mode. The quality ranges corresponding to different FEC coding modes may be the same or different. There may or may not be an intersection between these quality ranges, which is not limited in this application.

Optionally, in the multiple FEC coding modes, for the error correction capability of the FEC coding mode and the parameter condition corresponding to the FEC coding mode: the error correction capability and the quality range indicated by the parameter condition. The quality in the negative correlation. On the one hand, when the transmission quality indicated by the state parameter is low, the state parameter can satisfy the parameter condition corresponding to the FEC encoding method with higher error correction capability. At this time, if the state parameter satisfies the parameter condition corresponding to the target FEC encoding method, Then, the target FEC coding mode is the FEC coding mode with higher error correction capability, so the data transmission quality can be effectively improved. On the other hand, when the transmission quality indicated by the state parameter is high, the state parameter can satisfy the parameter conditions corresponding to the FEC encoding mode with low error correction capability. At this time, if the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode , then the target FEC encoding method is the FEC encoding method with low error correction ability. Since the error correction ability of the FEC encoding method is positively related to the power consumption of the communication equipment caused by the FEC encoding method, it can ensure high data transmission quality. In the case of reducing the power consumption of communication equipment.

The above state parameter may be determined independently by the first device, or may be determined with the assistance of the second device, which is not limited in this application.

In an optional solution, after sending the test data to the second device through the channel, the first device may receive the at least part of the parameters sent by the second device according to the test data, and then The state parameter is determined based on the at least part of the parameters.

In another optional solution, after sending the test data to the second device through the channel, the first device may receive the reference information of the at least part of the parameters sent by the second device according to the test data , and then obtain the state parameter according to the reference information.

Optionally, before the first device encodes the target data in the target FEC encoding manner, the method further includes: receiving notification information sent by the second device through the channel, where the notification information is used to indicate Whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode. The first device may use the target FEC encoding method to encode the target data when the notification information is used to indicate that the state parameter satisfies the parameter condition corresponding to the target FEC encoding method.

In a second aspect, another data transmission method is provided, and the data transmission method can be used for a second device, the second device supports decoding modes corresponding to multiple FEC encoding modes, and each of the FEC encoding modes has a corresponding parameter conditions. The method includes: receiving first encoded data sent by the first device through a channel between the first device and the second device; The first encoded data is decoded and error corrected by using a decoding mode corresponding to the target FEC encoding mode. Wherein, the target FEC encoding mode is one FEC encoding mode among the multiple FEC encoding modes, and the first encoded data carries: an identifier used to indicate the target FEC encoding mode. The above-mentioned first encoded data is data obtained by the first device using the target FEC encoding mode when the state parameter of the channel between the first device and the second device meets the parameter conditions corresponding to the target FEC encoding mode.

Optionally, the second device may not only support decoding modes corresponding to the above-mentioned multiple FEC encoding modes, but also support decoding modes corresponding to auxiliary encoding modes other than the multiple FEC encoding modes. This application does not limit the types of auxiliary coding modes, and the auxiliary coding modes may include one coding mode or multiple coding modes. For example, the auxiliary encoding method includes: at least one of a cyclic redundancy check (Cyclic Redundancy Check, CRC) encoding method and an error correction code (Error Correction Code, ECC) encoding method, and the auxiliary encoding method may also include a variety of the above-mentioned encoding methods. Other FEC encoding methods with different FEC encoding methods.

In an optional solution, after decoding and error correcting the first encoded data using the decoding mode corresponding to the target FEC encoding mode, the second device may use the decoding mode corresponding to the auxiliary encoding mode to Decode the target data. The target data is: data obtained by decoding and error-correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode.

In another optional solution, the second device receiving the first encoded data sent by the first device includes: the second device receiving the second encoded data sent by the first device, where the second encoded data is The first device encodes the data obtained by encoding the first encoded data in the auxiliary encoding manner. Before decoding and error correcting the first encoded data by using the decoding mode corresponding to the target FEC encoding mode, the second device may use the decoding mode corresponding to the auxiliary encoding mode to decode the second encoded data , to obtain the first encoded data.

In yet another optional solution, the method further includes: the second device receives the third encoded data sent by the first device through the channel, and then uses the decoding mode corresponding to the auxiliary encoding mode to The third encoded data is decoded. The third encoded data is data obtained by encoding auxiliary data in the auxiliary encoding manner.

Optionally, before receiving the first encoded data sent by the first device, the second device may also receive test data sent by the first device through the channel, and at least some of the parameters in the state parameters are used for Reflect the transmission of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application.

In an optional solution, after receiving the test data sent by the first device through the channel, the second device may further determine the at least part of the parameters according to the test data, and then send the test data to the first device. The at least some of the parameters are sent. In this way, the first device can acquire the at least part of the parameters.

In another optional solution, after receiving the test data sent by the first device through the channel, the second device may further determine the reference information of the at least part of the parameters according to the test data, and report to the The first device sends the reference information. In this way, the first device can determine at least some of the above parameters according to the reference information.

Optionally, before receiving the first encoded data sent by the first device, the second device may also determine, according to the state parameter, whether the state parameter satisfies the parameter condition corresponding to the target FEC encoding mode; The second device may send notification information to the first device through the channel, where the notification information is used to indicate whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode.

In a third aspect, a communication device is provided, where the communication device may be a first device, the first device supports multiple FEC coding modes, and each of the FEC coding modes has corresponding parameter conditions. The communication device includes: an encoding module and a sending module. The encoding module is configured to encode the target data by the first device using the target FEC encoding method when the state parameter of the channel between the first device and the second device satisfies the parameter conditions corresponding to the target FEC encoding method to obtain the first encoding data. The sending module is configured to send the first encoded data to the second device through the channel. Wherein, the target FEC encoding mode is one FEC encoding mode among multiple FEC encoding modes supported by the first device, and the first encoded data encoded by using the target FEC encoding mode carries: for indicating the target FEC encoding way identification.

Optionally, the first device may not only support the above-mentioned multiple FEC encoding modes, but also support auxiliary encoding modes other than the multiple FEC encoding modes, and the second device may also support decoding modes corresponding to the auxiliary encoding modes. The first device may also use an auxiliary encoding mode to perform encoding, and the second device may use a decoding mode corresponding to the auxiliary encoding mode to perform decoding. This application does not limit the types of auxiliary coding modes, and the auxiliary coding modes may include one coding mode or multiple coding modes. For example, the auxiliary encoding method includes at least one of a CRC encoding method and an ECC encoding method, and the auxiliary encoding method may also include other FEC encoding methods different from the above-mentioned multiple FEC encoding methods.

In an optional solution, the encoding module is further configured to encode the initial data in the auxiliary encoding mode to obtain the target data before encoding the target data in the target FEC encoding mode.

In another optional solution, the encoding module is further configured to encode the first encoded data by using the auxiliary encoding method after encoding the target data by using the target FEC encoding method, to obtain the first encoded data. Second coded data; at this time, the above-mentioned sending module may send the second coded data to the second device through the channel, so as to realize sending the first coded data to the second device through the channel.

In yet another optional solution, the encoding module is further configured to encode the auxiliary data in the auxiliary encoding manner to obtain third encoded data. The above-mentioned sending module is further configured to send the third encoded data to the second device through the channel.

Optionally, the above-mentioned sending module is further configured to send test data to the second device through the channel before the first device encodes the target data in the target FEC encoding manner, at least part of the state parameters. The parameter is used to reflect the transmission situation of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application.

Optionally, in the multiple FEC coding modes, for the error correction capability of the FEC coding mode and the parameter condition corresponding to the FEC coding mode: the error correction capability and the quality range indicated by the parameter condition. The quality in the negative correlation.

In an optional solution, the first device may further include a receiving module and a processing module. The receiving module may be configured to receive the at least part of the parameters sent by the second device according to the test data after the sending module sends the test data to the second device through the channel. The processing module is configured to determine the state parameter according to the at least part of the parameters.

In another optional solution, the first device may further include a receiving module and a processing module. The receiving module may be configured to receive the reference information of the at least part of the parameters sent by the second device according to the test data after the sending module sends the test data to the second device through the channel. The processing module is configured to obtain the state parameter according to the reference information.

Optionally, the first device may further include a receiving module. The receiving module is configured to receive notification information sent by the second device through the channel before the encoding module uses the target FEC encoding method to encode the target data, where the notification information is used to indicate whether the state parameter satisfies the requirements. Describe the parameter conditions corresponding to the target FEC coding mode. The encoding module may use the target FEC encoding method to encode the target data when the notification information is used to indicate that the state parameter satisfies the parameter condition corresponding to the target FEC encoding method.

In a fourth aspect, another communication device is provided, the communication device may be a second device, the second device supports decoding modes corresponding to multiple FEC encoding modes, and each of the FEC encoding modes has corresponding parameter conditions . The communication device includes: a receiving module and a decoding module. The receiving module is configured to receive the first encoded data sent by the first device through the channel between the first device and the second device; the decoding module is configured to indicate the target FEC according to the data carried by the first encoded data The identifier of the encoding mode, and the decoding mode corresponding to the target FEC encoding mode is used to decode and error correct the first encoded data. Wherein, the target FEC encoding mode is one FEC encoding mode among the multiple FEC encoding modes, and the first encoded data carries: an identifier used to indicate the target FEC encoding mode. The above-mentioned first encoded data is data obtained by the first device using the target FEC encoding mode when the state parameter of the channel between the first device and the second device meets the parameter conditions corresponding to the target FEC encoding mode.

In an optional solution, after the decoding module uses the decoding mode corresponding to the target FEC encoding mode to decode and correct the errors of the first encoded data, it can use the decoding mode corresponding to the auxiliary encoding mode to decode the first encoded data. Decode the target data. The target data is: data obtained by decoding and error-correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode.

In another optional solution, the receiving module may receive the first encoded data by receiving the second encoded data sent by the first device. The second encoded data is data obtained by encoding the first encoded data by the first device using the auxiliary encoding manner. The decoding module may use the decoding mode corresponding to the auxiliary encoding mode to decode the second encoded data before decoding and error correcting the first encoded data by using the decoding mode corresponding to the target FEC encoding mode, The first encoded data is obtained.

In yet another optional solution, the above receiving module is further configured to receive third encoded data sent by the first device through the channel. The above-mentioned decoding module is further configured to decode the third encoded data by using a decoding mode corresponding to the auxiliary encoding mode. Wherein, the third encoded data is data encoded by using the auxiliary encoding method.

Optionally, before receiving the first encoded data sent by the first device, the receiving module may also receive test data sent by the first device through the channel, and at least some of the parameters in the state parameters are used for Reflect the transmission of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application.

In an optional solution, the communication device further includes a processing module and a sending module. The processing module is configured to, after the receiving module receives the test data sent by the first device through the channel, determine the at least part of the parameters according to the test data. The sending module is configured to send the at least part of the parameters to the first device. In this way, the first device can acquire the at least part of the parameters.

In another optional solution, the communication device further includes a processing module and a sending module. The processing module is configured to, after receiving the test data sent by the first device through the channel, determine the reference information of the at least part of the parameters according to the test data. The sending module is configured to send the reference information to the first device. In this way, the first device can determine at least some of the above parameters according to the reference information.

Optionally, the communication device further includes a processing module and a sending module, and the processing module is configured to determine whether the state parameter satisfies the target according to the state parameter before the receiving module receives the first encoded data sent by the first device. Parameter conditions corresponding to the FEC encoding method. The sending module may be configured to send notification information to the first device through the channel, where the notification information is used to indicate whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode.

In a fifth aspect, a communication device is provided, the communication device includes: a processor and a memory, where a program is stored in the memory; the processor is configured to call the program stored in the memory, so that the communication device A data transmission method as described in any design of the first aspect is performed.

In a sixth aspect, a communication device is provided, the communication device comprising: a processor and a memory, where a program is stored in the memory; the processor is configured to call the program stored in the memory, so that the communication device A data transmission method as described in any one of the designs of the second aspect is performed.

In a seventh aspect, a communication system is provided, the communication system includes a first device and a second device.

The first device is: the communication device according to any one of the designs in the third aspect; the second device is: the communication device according to any one of the designs in the fourth aspect.

Alternatively, the first device is: the communication device according to any one of the designs in the fifth aspect; the second device is: the communication device according to any one of the designs in the sixth aspect.

In an eighth aspect, a computer storage medium is provided, and a computer program is stored in the storage medium;

When the computer program runs on a computer, the computer executes the data transmission method described in any design of the first aspect;

Alternatively, when the computer program is run on a computer, the computer executes the data transmission method described in any design of the second aspect.

In a ninth aspect, there is provided a computer program product containing instructions, when the computer program product is run on a communication device, the communication device is made to execute the data transmission method described in any one of the designs of the first aspect; or, when the computer program product is executed When running on the communication device, the communication device is caused to execute the data transmission method described in any design of the second aspect;

For the technical effect brought by any one of the design methods in the second aspect to the ninth aspect, reference may be made to the technical effect brought by the corresponding design method in the first aspect, which will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a communication device according to an embodiment of the present application;

3 is a flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a channel provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a message provided by an embodiment of the present application;

6 is a schematic diagram of a process for obtaining first encoded data according to an embodiment of the present application;

7 is a flowchart of another data transmission method provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of the first initial data provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a first target data provided by an embodiment of the present application;

10 is a schematic structural diagram of a second encoded data provided by an embodiment of the application;

11 is a flowchart of another data transmission method provided by an embodiment of the present application;

12 is a schematic structural diagram of a second type of initial data provided by an embodiment of the present application;

13 is a schematic structural diagram of a second type of target data provided by an embodiment of the present application;

FIG. 14 is a schematic structural diagram of a third type of initial data provided by an embodiment of the present application;

15 is a schematic structural diagram of a third type of target data provided by an embodiment of the present application;

16 is a schematic structural diagram of a fourth type of target data provided by an embodiment of the present application;

17 is a schematic structural diagram of a fifth type of target data provided by an embodiment of the present application;

18 is a block diagram of a communication device provided by an embodiment of the present application;

FIG. 19 is a block diagram of another communication device provided by an embodiment of the present application.

Detailed ways

In order to make the principles, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 1 , the communication system 0 may include multiple communication devices (such as a first device 01 and a second device 02 in FIG. 1 ).

It should be noted that only two communication devices in the communication system are shown in FIG. 1 , and the number of communication devices in the communication system may also be greater than 2, for example, the number may be 10, 100 or 1000, etc. This application implements the The example does not limit this. Each communication device in the communication system can be used as a data sender or as a data receiver. In the embodiment of this application, the first device 01 is used as the data sender, and the second device 02 is used as the data receiver as an example. .

The communication device may be any device capable of transmitting data, such as a server, a server cluster, a gateway, a router, a mobile phone, a tablet computer, a desktop computer, a security device, a smart screen, or an interface unit in an electronic device. For example, the first device is an interface unit between a system on chip (System on Chip, SOC) in the electronic device and a peripheral device, and the second device is the peripheral device.

For example, the communication device may include: a processing unit; the processing unit is configured to couple with the storage unit, and after reading the instructions in the storage unit, execute the method performed by the communication device as described in the embodiments of the present application according to the instructions. The number of processing units may be multiple, and the storage unit coupled with the processing unit may be independent of the processing unit or the communication device, or may be within the processing unit or the communication device. The storage unit may be a physically independent unit, or may be a storage space on a cloud server or a network hard disk. Optionally, there may be one or more storage units. When there are multiple storage units, they can be located in the same or different positions, and can be used independently or in combination. Exemplarily, when the storage unit is located inside the communication device, please refer to FIG. 2 , which is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device 200 includes: a processing unit 202 and a storage unit 201, wherein the storage unit 201 is used to store a program, and the processing unit 202 is used to call the program stored in the storage unit 201, so that the communication device executes a corresponding method or function. Optionally, as shown in FIG. 2 , the communication device 200 may further include at least one communication interface 203 and at least one communication bus 204 . The storage unit 201 , the processing unit 202 and the communication interface 203 are communicatively connected through a communication bus 204 . The communication interface 203 is used to communicate with other devices under the control of the processing unit 202 , and the processing unit 202 can call the program stored in the storage unit 201 through the communication bus 204 .

Communication devices in a communication system have a channel between them, and these communication devices can communicate (eg, transmit data) through the channel. The channel may be a wired network-based channel or a wireless network-based channel. Wherein, the wired network may include but is not limited to: Universal Serial Bus (English: Universal Serial Bus; Abbreviation: USB), and the wireless network may include but not limited to: Wireless Fidelity (English: Wireless Fidelity; Abbreviation: WIFI), Bluetooth, Infrared, Zigbee (English: Zigbee) or data, etc.

With the development of science and technology, the amount of data transmitted between communication devices is increasing, and the data transmission rate is also getting higher and higher. For example, the functions of the communication equipment to collect images are becoming more and more powerful, the resolution of the images collected by the communication equipment is getting higher and higher (such as the resolution called 4K, the resolution called 8K), and the data of the images with higher resolution is getting higher and higher. If the image needs to be transmitted, the amount of data transmitted between the communication devices will be large. For another example, in a high-definition live broadcast scenario, communication equipment also needs to transmit large amounts of data quickly.

Data with a large amount of data transmitted quickly is more prone to bit errors. Usually, in order to ensure the reliability of data transmission, the communication device needs to correct the data in the process of data transmission.

In the related art, the data transmitting end (a certain communication device) and the receiving end (another communication device) perform error correction on the data based on the FEC encoding and decoding method. However, using the FEC encoding and decoding method to encode and decode data will introduce a large delay and encoding overhead, and will increase the power consumption of the communication device.

An embodiment of the present application provides a data transmission method, in which a communication device supports multiple FEC encoding and decoding methods. In addition, the communication device can determine whether to use each FEC encoding and decoding mode to encode and decode the data according to the state parameters of the channel. Therefore, the selection of multiple FEC encoding and decoding methods is realized, the probability of using multiple FEC encoding and decoding methods to encode and decode data is reduced, and the high delay of data transmission, high encoding overhead and high power consumption of communication equipment are reduced. high probability.

For example, FIG. 3 is a flowchart of a data transmission method provided by an embodiment of the present application, and the data transmission method may be used for the first device and the second device in the communication system shown in FIG. 1 . As shown in Figure 3, the data transmission method may include:

Step 101: The first device sends test data to the second device through the channel between the first device and the second device.

There is a channel for data transmission between the first device and the second device. Before transmitting data to the second device, the first device can first send test data to the second device, so that the first device and the second device can base on the data. The test data is used to test the channel.

For example, before sending the test data, the first device may also send a notification message to the second device, where the notification message is used to notify the second device that the first device is about to send the test data, and the second device may receive the test according to the notification message data.

Optionally, after the first device and the second device are started, data may continue to be transmitted between the first device and the second device, and when the first device does not need to send data to the second device, the first device may send data to the second device. The second device sends idle data, and the second device does not need to process the idle data after receiving the idle data. For example, after sending the test data to the second device in step 101, the first device may send idle data to the second device, and the second device does not need to process the idle data.

It should be noted that the test data may be business data that carries business information, or of course it may not be business data (for example, test data that does not carry business information transmitted before the business data is transmitted), and this embodiment of the present application does not make any provision for this. limited.

Step 102: The second device determines a state parameter of the channel according to the test data, where the state parameter is used to reflect the transmission situation of the test data.

For example, the state parameter may include at least one of parameters such as a bit error rate, a packet loss rate, a baud rate, and a data transmission rate, which is not limited in this embodiment of the present application.

After receiving the test data, the second device may determine the state parameter of the channel according to the transmission situation of the test data. For example, assuming that the state parameter includes the packet loss rate, the first device and the second device pre-agreed on the total number of data packets included in the test data (for example, the total number is indicated in the above notification message), the second device can The number of data packets contained in the test data is divided by the total number to obtain the packet loss rate.

Step 103: The second device sends the state parameter to the first device through the channel.

After obtaining the state parameter of the channel, the second device may send the state parameter to the first device through the channel, so that the first device can determine whether to use each of the multiple FEC encoding modes for encoding according to the state parameter.

It should be noted that, assuming that the first device continues to send idle data to the second device after sending the test data to the second device, then in the process of the second device sending the status parameter to the first device in step 103, the first device The idle data is also continuously sent to the second device.

In step 103, it is taken as an example that the channel through which the second device sends the state parameter to the first device is the channel through which the first device sends data to the second device. Certainly, the channel through which the second device sends the status parameter to the first device may not be the channel through which the first device sends data to the second device. As shown in FIG. 4 , there are multiple channels between the first device and the second device for the first device to transmit data to the second device, and at least one clock channel is also provided between the first device and the second device, and a serial A line clock signal (Serial Clock, SCL) channel and a serial data signal (Serial Data, SDA) channel, the second device can send status parameters to the first device through any channel, the SCL channel or the SDA channel.

The second device may directly send the state parameter to the first device, or may carry the state parameter in a message and send it to the first device. Illustratively, taking the status parameter including the bit error rate as an example, the structure of the message may be as shown in FIG. 5 , and the message may include: prefix (Premble), data synchronization information (Sync), control/data information ( C/D), equalization code stream (Equalization_Code_Stream), pseudo-random binary sequence (PRBS), pseudo-random binary sequence of bit error rate (PRBS for BER), IDLE (idle bit). The bit error rate may be included in the pseudorandom binary sequence of the bit error rate.

Step 104: The first device determines whether the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes, and the target FEC encoding mode is one FEC encoding mode among the multiple FEC encoding modes. Step 105 is executed when the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes.

Each of the multiple FEC encoding methods has corresponding parameter conditions. The first device needs to determine whether the state parameter satisfies the parameter conditions corresponding to the target FEC encoding method in step 104, and if the state parameter satisfies the target FEC encoding method When the corresponding parameter conditions are met, step 105 may be performed to use the target FEC encoding mode for encoding. However, when the state parameter does not meet the parameter conditions corresponding to the target FEC encoding mode, the first device does not need to use the target FEC encoding mode for encoding. In this case, the first device can directly send the target data to be transmitted to the second device.

The target FEC encoding mode is one FEC encoding mode among multiple FEC encoding modes. For each FEC encoding mode except the target FEC encoding mode among the multiple FEC encoding modes, the first device can refer to step 104 to determine whether The FEC encoding method is used for encoding, and details are not described herein in this embodiment of the present application.

It can be understood that the first device can support multiple FEC encoding modes, and each FEC encoding mode has corresponding parameter conditions. The first device can determine whether the state parameter satisfies the parameter conditions corresponding to each FEC encoding mode, and when the state parameter satisfies the parameter conditions corresponding to a certain FEC encoding mode, the first device can determine that the FEC encoding mode can be used for transmission. the target data to encode.

When the state parameter does not satisfy a parameter condition corresponding to a certain FEC encoding mode, the first device may determine that the target data cannot be encoded by this FEC encoding mode. Therefore, the situation of high data transmission delay and high power consumption of the first device and the second device caused by the use of this FEC encoding method can be avoided.

When the state parameter does not meet the parameter conditions corresponding to each FEC encoding mode, the first device does not need to use the FEC encoding mode to encode the target data to be transmitted.

It should also be noted that the state parameter may include at least one parameter, the parameter conditions corresponding to the FEC encoding method may include the conditions of at least part of the parameters in the at least one parameter, and the parameter conditions corresponding to different FEC encoding methods may be for the same parameter. , or for different parameters. For example, the status parameters include: bit error rate, packet loss rate, and data transmission rate, and multiple FEC encoding modes include: FEC encoding modes 1, 2, and 3. The parameter conditions corresponding to FEC coding mode 1 include: a certain range of bit error rate, a certain range of packet loss rate, and a certain range of data transmission rate; the parameter conditions corresponding to FEC coding mode 2 include: bit error rate A certain range and a certain range of the data transmission rate; the parameter conditions corresponding to the FEC coding mode 3 include: a certain range of the packet loss rate.

Optionally, the state parameter of the channel is used to indicate: the transmission quality of the channel, and the parameter condition corresponding to the FEC coding scheme is used to indicate that the transmission quality is within the quality range corresponding to the FEC coding scheme. The quality ranges corresponding to different FEC coding modes may be the same or different. There may or may not be an intersection between these quality ranges, which is not limited in this embodiment of the present application.

On the one hand, when the transmission quality indicated by the status parameter is outside the quality range corresponding to each FEC encoding method, the status parameter will not satisfy the parameter conditions corresponding to any FEC encoding method, so the subsequent first device will not use The FEC encoding method encodes the data. In addition, when the transmission quality indicated by the status parameter is higher than the upper limit of the quality range corresponding to each FEC encoding method, the transmission quality indicated by the status parameter is higher. At this time, even if the FEC encoding method is not used to encode the data, the It can ensure high quality of data transmission.

On the other hand, when the transmission quality indicated by the state parameter is within the quality range corresponding to the at least one FEC encoding mode, the state parameter satisfies the parameter conditions corresponding to the at least one FEC encoding mode, and the at least one FEC encoding mode is used in this case. Encoding the target data in different ways can improve the quality of data transmission and ensure the reliability of data transmission.

Therefore, the data transmission method provided by the embodiment of the present application can reduce the data transmission delay as much as possible and reduce the power consumption of the communication device under the condition of ensuring high data transmission quality.

Step 105: The first device encodes the target data by using the target FEC encoding mode to obtain first encoded data.

When the first device determines that the state parameter satisfies the parameter condition corresponding to the target FEC encoding mode, the first device may use the target FEC encoding mode to encode the target data to obtain the first encoded data.

Further, when the first device uses the target FEC encoding method to encode the target data, in order to facilitate the second device to use the decoding method corresponding to the target FEC encoding method to decode and correct errors, it can be used in the first encoded data. Indicates the identifier of the target FEC encoding method. For example, assuming that the target FEC encoding mode is Mode 1, the encoded data obtained by encoding the target data in Mode 1 may include: an identification bit, an information bit and a check bit, wherein the identification bit is used to carry and indicate the Mode 1. The information bit is used to carry the target data, and the check bit is used to carry the check data.

Optionally, when the first device uses the target FEC encoding method to encode the target data, the first device can cut the target data into a plurality of first data blocks, and then obtain at least one data block based on the plurality of first data blocks. Second data blocks, each of which may include at least one first data block. Finally, the first device may use the target FEC encoding method to generate the check digit of each second data block, and obtain the encoded data of each second data block (including the second data block and its check digit). In addition, the first device also needs to add an identification bit (used to indicate the target FEC encoding mode) before the encoded data of the at least one second data block, so as to obtain encoded data corresponding to the target FEC encoding mode. As shown in FIG. 6 , the first device may cut the target data into 6 first data blocks, and then obtain 3 second data blocks based on the 6 first data blocks, and each second data block may include 2 the first data block. Finally, the first device may use the target FEC encoding method to generate the check digit of each second data block, and obtain the encoded data of each second data block (including the second data block and its check digit). In addition, the first device also needs to add an identification bit (used to indicate the target FEC encoding mode) before the encoded data of the three second data blocks to obtain the first encoded data.

It should be noted that the FEC encoding method in this embodiment of the present application may be based on any error correction technology, such as Reed-Solomon (Reed-solomon, RS) technology, Bose–Chaudhuri–Hocquenghem codes (BCH) Or a low density parity check code (Low Density Parity Check Code, LDPC), etc., which is not limited in this embodiment of the present application.

Step 106: The first device sends the first encoded data to the second device through the channel.

Step 107: The second device decodes and corrects errors for the first encoded data by using a decoding mode corresponding to the target FEC encoding mode according to the identifier used to indicate the target FEC encoding mode in the first encoded data.

The second device supports decoding modes corresponding to the foregoing multiple FEC encoding modes. It should be noted that the technology used in the encoding mode and the corresponding decoding mode is the same, and the encoding process of the encoding mode is opposite to the decoding process of the decoding mode.

Since the first encoded data carries an identifier for indicating the target FEC encoding mode, after receiving the encoded data, the second device can determine the target FEC encoding mode according to the identifier in the encoded data, and use the target FEC encoding method. The decoding mode corresponding to the FEC encoding mode decodes and corrects the encoded data.

In the process of decoding the encoded data by using the decoding mode corresponding to the target FEC encoding mode, if the second device finds that there is no error in the encoded data, it may perform a subsequent process based on the decoded data. If the second device finds that there is an error in the encoded data, and the second device can correct the error based on the decoding mode corresponding to the target FEC encoding mode, the second device can correct the error, and then use the decoded data to correct the error. The data performs subsequent processes. If the second device cannot correct the error based on the decoding mode corresponding to the target FEC encoding mode, the second device may send the encoded data to the first device to trigger the first device to resend the data.

To sum up, in the data transmission method provided by the embodiment of the present application, the first device supports multiple FEC coding modes, and for each FEC coding mode in the multiple FEC coding modes, the first device parameters, and the parameter conditions corresponding to the FEC encoding mode, selectively use the FEC encoding mode to encode the target data. Therefore, the first device may use the FEC encoding mode for encoding, or the first device may not use the FEC encoding mode for encoding. In this way, it is avoided that the first device always uses this FEC encoding method to encode, resulting in high data transmission delay and high power consumption of the communication device.

In this embodiment of the present application, the first device may use the multiple FEC encoding methods for encoding, the first device may also use some of the FEC encoding methods for encoding, and the first device may not use the FEC encoding methods. The multiple FEC encoding methods are encoded. In this way, it is avoided that the first device always uses the multiple FEC encoding methods to encode, resulting in high data transmission delay and high power consumption of the communication device.

In addition, since the first device supports the FEC encoding mode in the embodiment of the present application, the second device supports the decoding mode corresponding to the FEC encoding mode, and the FEC encoding mode and the decoding mode corresponding to the FEC encoding mode can realize the decoding of multiple bits in the data. Error correction, therefore, the reliability of data transmission in this embodiment of the present application is relatively high.

Further, in this embodiment of the present application, a target encoding mode may be selected from a variety of FEC encoding modes to encode the target data according to the state parameter of the channel. In this way, the target FEC encoding method used in the encoding can adapt to the state of the channel, so that different FEC encoding methods can be used to correct errors for the data according to different channel states, thereby weakening the errors in the process of channel transmission of data. .

Optionally, when the state parameter of the above-mentioned channel is used to indicate the transmission quality, and the parameter condition corresponding to the FEC coding scheme is used to indicate that the transmission quality is within the quality range corresponding to the FEC coding scheme, in multiple FEC coding schemes, for The error correction capability of the FEC coding mode and the parameter conditions corresponding to the FEC coding mode: the error correction capability is negatively correlated with the quality in the quality range indicated by the parameter condition.

On the one hand, when the transmission quality indicated by the state parameter is low, the state parameter can satisfy the parameter condition corresponding to the FEC encoding method with higher error correction capability. At this time, if the state parameter satisfies the parameter condition corresponding to the target FEC encoding method, Then, the target FEC coding mode is the FEC coding mode with higher error correction capability, so the data transmission quality can be effectively improved.

On the other hand, when the transmission quality indicated by the state parameter is high, the state parameter can satisfy the parameter conditions corresponding to the FEC encoding mode with low error correction capability. At this time, if the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode , then the target FEC encoding method is the FEC encoding method with low error correction ability. Since the error correction ability of the FEC encoding method is positively related to the power consumption of the communication equipment caused by the FEC encoding method, it can ensure high data transmission quality. In the case of reducing the power consumption of communication equipment.

For example, it is assumed that the multiple FEC encoding modes include: a first FEC encoding mode and a second FEC encoding mode. The error correction capability of the first FEC coding scheme is greater than that of the second FEC coding scheme. The parameter conditions corresponding to the first FEC encoding mode are: the bit error rate is greater than 1E-12 (representing 10 to the power of -12), and the data transmission rate is greater than 16 Gbps (Gbps represents 1000 megabits per second). The parameter conditions corresponding to the second FEC coding mode are: the bit error rate is less than or equal to 1E-12, and/or the data transmission rate is less than or equal to 16 Gbps. It can be seen that the quality in the range of transmission quality indicated by the parameter condition corresponding to the first FEC encoding method is relatively low. When the state parameter satisfies the parameter condition corresponding to the first FEC encoding method, it indicates that the current transmission quality is low. It is determined that the first FEC encoding mode with higher error correction capability is the target FEC encoding mode adopted for encoding, so as to improve the transmission quality of data. The quality in the range of the transmission quality indicated by the parameter condition corresponding to the second FEC encoding method is relatively high. When the status parameter satisfies the parameter condition corresponding to the second FEC encoding method, it indicates that the current transmission quality is relatively high, and the correction can be determined at this time. The second FEC encoding mode with lower error capability is the target FEC encoding mode adopted for encoding, so as to reduce the power consumption of the communication device.

In the embodiment shown in FIG. 3 , the first device may support multiple FEC coding modes.

The codewords of the various FEC coding modes are different. in. The encoded data obtained by the first device encoding the data in a certain FEC encoding manner may include at least one code word (Code Word), and the code word may be referred to as a code word of the FEC encoding manner. Exemplarily, the code word may include information bits and check bits, the information bits are used to carry the encoded data, the check bits are used to carry the check data obtained by FEC encoding, and the different code words may refer to: the type of the code word ( Such as RS or BCH, LDPC), at least one of the length of the codeword, the length of the information bits, the length of the check bits, and the length of the information bits that can be corrected by the check bits are different. The length of the information bits that can be corrected by the check bit is used to represent the error correction capability of the FEC coding method.

For example, the first device may support: the first FEC encoding mode and the second FEC encoding mode, the characteristics of the codeword of the first FEC encoding mode may be expressed as RS (228, 220, 4, 8), the second FEC encoding mode The characteristics of the codeword can be represented as RS(114, 110, 2, 8). Wherein, RS(228, 220, 4, 8) indicates that the type of the codeword of the first FEC coding mode is RS, the length of the codeword is 228 symbols (Symbol), and the length of the information bits in the codeword is 220 symbol, the length of the check digit in the codeword is 8 symbols, and the length of the information bit that can be error-corrected by the check digit in the codeword is 4 symbols. RS(114, 110, 2, 8) indicates that the type of the codeword in the second FEC coding mode is RS, the length of the codeword is 114 symbols, the length of the information bits in the codeword is 110 symbols, and the codeword is The length of the check digit in the codeword is 8 symbols, and the length of the information bit that can be corrected by the check digit in the codeword is 2 symbols. It can be seen that the lengths of the code words in the first FEC encoding method and the second FEC encoding method are different, the lengths of the information bits in the code words are different, and the lengths of the information bits that can be corrected by the check bits are different (the first FEC encoding method and the second FEC encoding method have different lengths. The error correction capabilities of the two FEC coding methods are different).

The first device may include a plurality of FEC encoding circuits corresponding to the multiple FEC encoding modes one-to-one, and the first device may use the FEC encoding mode corresponding to the encoding circuit to perform encoding through each FEC encoding circuit. The second device may include multiple FEC decoding circuits one-to-one corresponding to the multiple FEC encoding modes, and the second device may use the decoding mode corresponding to the FEC encoding mode corresponding to the decoding circuit to perform decoding and error correction through each FEC decoding circuit .

The first device may further include: a first selection circuit, the first selection circuit is connected to the plurality of FEC encoding circuits, when the first device determines the FEC encoding mode in which the state parameter satisfies the corresponding parameter condition among the multiple FEC encoding modes , the first device will generate a first control signal, the first control signal can trigger the first selection circuit to open the FEC encoding circuits corresponding to the FEC encoding methods, so that the corresponding FEC encoding methods are used for subsequent encoding by the FEC encoding circuits. Correspondingly, the second device may also include a second selection circuit, the second selection circuit is connected to the plurality of FEC decoding circuits, and when the second device determines the decoding method to be used, the second device will generate a second control signal , the second control signal can trigger the second selection circuit to turn on the FEC decoding circuits corresponding to the FEC encoding modes corresponding to these decoding modes, so as to facilitate subsequent decoding and error correction using the corresponding decoding modes by these FEC decoding circuits. The first selection circuit and the second selection circuit may be a data selector (multiplexer, MUX) or an auxiliary channel (Auxiliary, AUX).

Exemplarily, for each control signal in the first control signal and the second control signal, the control signal may include a plurality of control bits corresponding to various FEC encoding modes one-to-one, and each control bit in the first control signal It is used to indicate whether to enable the FEC encoding circuit corresponding to the corresponding FEC encoding mode, and each control bit in the second control signal is used to indicate whether to enable the FEC decoding circuit corresponding to the corresponding FEC encoding mode.

For example, assuming that the multiple FEC coding modes include the first FEC coding mode and the second FEC coding mode, the first control signal may include two bits, and the first bit of the two bits is the same as the first FEC coding mode. Correspondingly, the second bit corresponds to the second FEC coding mode. As shown in Table 1, when the first control signal is 00, it means that the state parameter does not meet the parameter conditions corresponding to the first FEC encoding method, and the state parameter does not meet the parameter conditions corresponding to the second FEC encoding method, the first selection circuit will Turn off both the FEC encoding circuit corresponding to the first FEC encoding mode and the FEC encoding circuit corresponding to the second FEC encoding mode. When the first control signal is 01, it means that the state parameter does not meet the parameter conditions corresponding to the first FEC encoding mode, and the state parameter meets the parameter conditions corresponding to the second FEC encoding mode, and the first selection circuit will correspond to the first FEC encoding mode The FEC encoding circuit of the second FEC encoding mode is turned off, and the FEC encoding circuit corresponding to the second FEC encoding mode is turned on. When the first control signal is 10, it indicates that the state parameter satisfies the parameter conditions corresponding to the first FEC encoding mode, and the state parameter does not meet the parameter conditions corresponding to the second FEC encoding mode, and the first selection circuit will correspond to the first FEC encoding mode The FEC encoding circuit of the second FEC encoding mode is turned on, and the FEC encoding circuit corresponding to the second FEC encoding mode is turned off. When the first control signal is 11, it indicates that the state parameter satisfies the parameter conditions corresponding to the first FEC encoding mode, and the state parameter satisfies the parameter conditions corresponding to the second FEC encoding mode, and the first selection circuit will select the corresponding parameters of the first FEC encoding mode. Both the FEC encoding circuit and the FEC encoding circuit corresponding to the second FEC encoding mode are turned on.

Table 1

In the embodiment shown in FIG. 3 , the state parameter is used to reflect the transmission situation of the test data, and all the state parameters are determined by the second device and then sent to the first device as an example.

On the one hand, a part of the parameters in the state parameters can also be used to reflect the transmission situation of the test data, and the part of the parameters in the state parameters is determined by the second device and then sent to the first device. At this time, the first device also needs to determine another part of the parameters in the state parameters by itself, and then obtain the state parameters according to the received part of the parameters and another part of the parameters determined by itself.

For example, it is assumed that the state parameters may include: bit error rate, packet loss rate, insertion loss, return loss, channel noise, baud rate and data transmission rate, and some of the above parameters may include: bit error rate, packet loss rate, wave Bit rate and data transmission rate, another part of the parameters can include: insertion loss, return loss and channel noise. Alternatively, a part of the above parameters may include: bit error rate, baud rate, and data transmission rate, and another part of the parameters may include: packet loss rate, insertion loss, return loss, and channel noise.

On the other hand, all the state parameters may also be determined by the first device, which is not limited in this embodiment of the present application.

For example, when the state parameter is determined by the first device, steps 102 and 103 in FIG. 3 do not need to be executed, and after the first device sends test data to the second device in step 101, the second device can use the test data according to the test data. Reference information of the state parameter is determined, and the reference information is sent to the first device through the channel. Afterwards, the first device may obtain the above-mentioned state parameter according to the reference information.

It should be noted that the reference information may be information required by the first device to obtain the status parameter.

For example, when the state parameter includes the packet loss rate, the reference information may be the number of data packets included in the test data received by the second device. After receiving the reference information, the first device may The number is divided by the total number of packets in the test data to obtain the packet loss rate of the test data.

Optionally, when the state parameter includes multiple parameters, part of the multiple parameters may be determined by the first device, and another part of the parameters may be determined by the second device and then sent to the first device. The first device may determine the part of the parameters by itself, or the first device may also receive reference information of the part of the parameters sent by the second device, and determine the part of the parameters according to the reference information.

For example, the status parameters include: packet loss rate, bit error rate, and data transmission rate, wherein the packet loss rate and bit error rate can be determined by the second device and sent to the first device, and the data transmission rate can be determined by the first device itself . For example, the first device may include a speed cut state register, the state value of the speed cut state register is used to indicate the data transmission rate, for example, the speed cut state register has two state values: 0 and 1, and the state value 0 indicates a low speed transmission state , the data transmission rate at this time is lower than the rate threshold, the state value 1 indicates the high-speed transmission state, and the data transmission rate at this time is higher than the rate threshold. The speed threshold can be any value, such as 6Gbps or 16Gbps. The first device may determine the data transfer rate by reading the state value of the speed cut state register. Optionally, when the second device needs to determine the data transmission rate, the second device may also read the state value of the speed cut state register in the second device to determine the data transmission rate.

Optionally, no matter how the state parameter is determined, the state parameter may include at least one of: bit error rate, packet loss rate, insertion loss, return loss, channel noise, baud rate, and data transmission rate .

In the above embodiment, the first device determines whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode as an example. Optionally, it can also be that the second device determines whether the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode, and then the second device sends the first device to indicate whether the state parameter meets the parameter conditions corresponding to the target FEC encoding mode. notification information. The first device may determine, according to the notification information, whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode.

In this case, the second device does not need to perform the above step 103. In addition, for the process of determining the target encoding mode among the multiple FEC encoding modes by the second device according to the state parameter, reference may be made to the foregoing step 104, which is not repeated in this embodiment of the present application.

The above describes the process of selectively adopting the FEC encoding method among the various FEC encoding methods. On this basis, the first device may further support an auxiliary encoding mode, and the second device may also support a decoding mode corresponding to the auxiliary encoding mode. The first device may also use an auxiliary encoding mode different from the above-mentioned multiple FEC encoding modes for encoding, and the second device may use a decoding mode corresponding to the auxiliary encoding mode for decoding. In this case, the adoption of the FEC coding mode among the various FEC coding modes in the foregoing embodiments is subject to conditions, while the use of the auxiliary coding mode may not be subject to conditions.

This embodiment of the present application does not limit the types of auxiliary encoding modes, and the auxiliary encoding modes may include one encoding mode or multiple encoding modes. For example, the auxiliary encoding method includes at least one of a CRC encoding method and an ECC encoding method, and the auxiliary encoding method may also include other FEC encoding methods different from the above-mentioned multiple FEC encoding methods.

Optionally, when the auxiliary coding mode has an error correction capability, when the second device uses the decoding mode corresponding to the auxiliary coding mode to perform decoding, the second device may also use the decoding mode corresponding to the auxiliary coding mode to perform error correction. When the auxiliary coding mode has the error detection capability, when the second device uses the decoding mode corresponding to the auxiliary coding mode to perform decoding, the second device may also use the decoding mode corresponding to the auxiliary coding mode to perform error detection. In the following embodiments, it is not mentioned that the decoding mode corresponding to the auxiliary coding mode is used to perform error detection or error correction. The content of error detection or error correction is not repeated in this embodiment of the present application.

For example, the first device may first use the FEC coding mode (such as the above-mentioned target FEC coding mode) to perform coding, and then use the auxiliary coding mode to perform coding. At this time, after step 105 in FIG. 3 , the data transmission method further includes: the first device encodes the first encoded data in an auxiliary encoding manner to obtain the second encoded data, and in step 106, the first device can pass the channel The second encoded data is sent to the second device to implement sending the first encoded data to the second device. Correspondingly, the second device receives the second encoded data in step 106 , and before step 107 , the second device can decode the second encoded data by using a decoding mode corresponding to the auxiliary encoding mode to obtain the above-mentioned first encoded data.

For another example, the first device may first use the auxiliary coding mode to perform coding, and then use the FEC coding mode (such as the above-mentioned target FEC coding mode) to perform coding. At this time, before step 105 in FIG. 3 , the data transmission method further includes: the first device encodes the initial data in an auxiliary encoding manner to obtain the above-mentioned target data. Correspondingly, after step 107, the second device may use a decoding mode corresponding to the auxiliary encoding mode to decode the target data. The target data is data obtained by decoding and error correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode.

For another example, the first device may use an FEC encoding mode (such as the above-mentioned target FEC encoding mode) and an auxiliary encoding mode for encoding, respectively. At this time, the embodiment shown in FIG. 3 further includes: the first device encodes the auxiliary data in an auxiliary coding manner to obtain third encoded data; after that, the first device sends the third encoded data to the second device through a channel. Correspondingly, after receiving the third encoded data, the second device may decode the third encoded data by using a decoding mode corresponding to the auxiliary encoding mode.

It should be noted that both the target data and the auxiliary data are data to be coded, the difference is that the target data is coded using the above-mentioned target FEC coding method, and the auxiliary data is coded using the auxiliary coding method. It can be seen that the first device uses the target FEC encoding method to encode a part of data (eg, target data), and uses an auxiliary encoding method to encode another part of data (eg, auxiliary data). In this way, the transmission reliability of the part of the data is relatively high. In addition, when the data transmission delay caused by the auxiliary encoding method is smaller than the data transmission delay caused by the FEC encoding method, and the equipment power consumption caused by the auxiliary encoding method is also smaller than the equipment power consumption caused by the FEC encoding method, the other part The time delay and device power consumption caused by data encoding are small.

In another example, the above-mentioned auxiliary coding modes may include multiple coding modes, and the first device may firstly use a part of the auxiliary coding modes for coding, and then use the FEC coding mode (such as the above-mentioned target FEC coding mode) for coding, and then use the FEC coding mode for coding. Another part of the auxiliary coding mode is used for coding. The second device may first decode by using the decoding mode corresponding to the other part of the encoding mode, then decode by using the decoding mode corresponding to the FEC encoding mode, and then decode by using the decoding mode corresponding to the part of the encoding mode.

When the first device not only uses the target FEC encoding method to encode, but also uses the auxiliary encoding method to encode, the reliability of data transmission can be further improved. Moreover, when the state parameter does not meet the parameter conditions corresponding to any FEC encoding mode, the first device may use the auxiliary encoding mode to perform encoding, so as to ensure the reliability of data transmission.

Optionally, the data transmission delay caused by the auxiliary encoding method is smaller than the data transmission delay caused by the FEC encoding method, and the device power consumption caused by the auxiliary encoding method is also smaller than that caused by the FEC encoding method. When the state parameter does not meet the parameter conditions corresponding to any FEC encoding method, the first device can use the auxiliary encoding method for encoding, so that the data transmission delay can be reduced as much as possible on the basis of ensuring the reliability of data transmission, and the Small device power consumption.

Optionally, whether the first device uses the auxiliary coding mode for encoding, and the coding order of the auxiliary coding mode may be pre-configured on the first device; whether the second device uses the decoding mode corresponding to the auxiliary coding mode for decoding, and this The decoding order of the decoding mode may also be pre-configured on the second device. The first device may use the auxiliary encoding mode to perform encoding according to the encoding order, and the second device may use the decoding mode corresponding to the auxiliary encoding mode to perform decoding according to the decoding order.

On this basis, the auxiliary coding mode may have corresponding parameter conditions. Before encoding by the auxiliary coding mode, the first device may also judge whether the above state parameters satisfy the parameter conditions corresponding to the auxiliary coding mode. If the state parameters satisfy the auxiliary coding mode Only when the parameter conditions corresponding to the mode are met, the auxiliary encoding mode is allowed to be used for encoding.

At this time, if the first device encodes in an auxiliary encoding manner, the encoded data obtained by encoding carries an identifier for indicating the auxiliary encoding manner. After receiving the encoded data, the second device may detect whether the encoded data carries an identifier for indicating the auxiliary encoding mode before decoding using the decoding mode corresponding to the auxiliary encoding mode according to the decoding order. When the identifier is carried in the encoded data, the second device uses the decoding mode corresponding to the auxiliary encoding mode to decode, otherwise the second device will not use the decoding mode corresponding to the auxiliary encoding mode to decode.

According to the above content, in the data transmission method provided by the embodiment of the present application, the target FEC encoding mode among the various FEC encoding modes may be combined with the auxiliary encoding mode for encoding. The data transmission method provided by the embodiments of the present application will be further explained below through several examples.

The auxiliary coding mode may be an auxiliary coding mode based on any coding technology. It should be noted that, if any encoding technology does not include the FEC encoding method, the auxiliary encoding method based on this encoding technology includes: all encoding methods in this encoding technology. If any one of the encoding technologies includes the FEC encoding mode, the auxiliary encoding mode based on the encoding technology includes: encoding modes other than the FEC encoding mode in the encoding technology.

Exemplarily, FIG. 7 is a flowchart of another data transmission method provided by an embodiment of the present application. In the data transmission method, the auxiliary coding mode is based on the Mobile Industry Processor Interface (MIPI) Camera Serial Interface 2 (CSI-2) ) in the D-Physical Layer (D-Port Physical Layer, D-PHY) auxiliary coding mode as an example, wherein, D-PHY is a physical layer port in CSI-2. The D-PHY technology includes: ECC encoding mode and CRC encoding mode, and does not include FEC encoding mode. Therefore, the auxiliary encoding mode based on D-PHY includes: ECC encoding mode and CRC encoding mode.

As shown in Figure 7, the data transmission method includes:

Step 201: The first device sends test data to the second device through the channel between the first device and the second device.

For step 201, reference may be made to step 101, which is not repeated in this embodiment of the present application.

Step 202: The second device determines a state parameter of the channel according to the test data, where the state parameter is used to reflect the transmission situation of the test data.

For step 202, reference may be made to step 102, which is not repeated in this embodiment of the present application.

Step 203: The second device sends the state parameter to the first device through the channel.

For step 203, reference may be made to step 103, which is not repeated in this embodiment of the present application.

Step 204: The first device adds a data type identifier (Data ID), a number of bytes (WC) and a virtual channel identifier (VCX) before the data block to be transmitted to obtain initial data.

The data block to be transmitted may be a data block obtained by cutting the data to be transmitted by the first device, and the data block may include 8 bits.

Exemplarily, the structure of the initial data is shown in FIG. 8 , and the initial data includes: data type identifiers, WC, VCX, and data blocks (payload) arranged in sequence. Among them, WC is used to mark the number of bytes in the payload, and WC includes 16 bits.

Step 205: The first device encodes the initial data by using a D-PHY-based auxiliary encoding manner to obtain target data.

For example, the first device may use the ECC encoding mode to encode the data type symbol, WC and VCX in the initial data to obtain an ECC error correction check code (which may include 6 bits), and use the CRC encoding mode to encode the initial data. The data block in is encoded to obtain a CRC check code (which can include 16 bits). After that, the first device may add the ECC error correction check code and the CRC check code to the header and the end of the data block in the initial data to obtain the target data. The structure of the target data is shown in FIG. 9 , and the target data includes: data type symbols, WC, VCX, ECC error correction check code, data block and CRC check code arranged in sequence.

Step 206: The first device determines whether the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes, and the target FEC encoding mode is any one of the multiple FEC encoding modes. Step 207 is performed when the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes.

When the state parameter does not meet the parameter conditions corresponding to the target FEC encoding mode, the first device does not need to use the target FEC encoding mode for encoding, and at this time, the first device can directly send the target data to the second device. The second device may directly use a decoding mode corresponding to the D-PHY-based auxiliary encoding mode to decode the target data, obtain initial data, and perform step 211 .

For step 206, reference may be made to step 104, which is not repeated in this embodiment of the present application.

Step 207: The first device encodes the target data by using the target FEC encoding method to obtain first encoded data.

For step 207, reference may be made to step 105, which is not repeated in this embodiment of the present application.

Step 208: The first device sends the first encoded data to the second device through the channel.

For step 208, reference may be made to step 106, which is not repeated in this embodiment of the present application.

Step 209: The second device decodes and corrects errors of the first encoded data by using the decoding mode corresponding to the target FEC encoding mode according to the identifier used to indicate the target FEC encoding mode in the first encoded data to obtain the target data.

For step 209, reference may be made to step 107, which is not repeated in this embodiment of the present application.

Step 210: The second device uses a decoding mode corresponding to the D-PHY-based auxiliary encoding mode to decode the target data to obtain initial data.

The decoding process in which the second device adopts the decoding mode corresponding to the D-PHY-based auxiliary encoding mode is the inverse process of the encoding process in which the first device adopts the D-PHY-based auxiliary encoding mode.

In the process of decoding the encoded data by the decoding method corresponding to the auxiliary encoding method based on D-PHY, if the second device finds that there is no error in the encoded data, it may perform a subsequent process based on the decoded data. If the second device finds that there is an error in the encoded data, and the second device can correct the error based on the decoding method, the second device can correct the error, and then execute the subsequent process based on the decoded data. If the second device cannot correct the error based on the decoding method, the second device may send the encoded data to the first device to trigger the first device to resend the data.

Step 211: The second device removes the data type identifier, WC and VCX in the initial data to obtain the data block to be transmitted.

In the embodiment shown in FIG. 7 , an FEC encoding mode in which the state parameter meets the corresponding parameter condition is taken as an example. When the state parameter does not meet the parameter condition corresponding to each FEC encoding mode in the multiple FEC encoding modes , the first device does not need to perform steps 206 and 207, and in step 208, the first device sends the encoded data encoded by the auxiliary encoding method to the second device. After the second device receives the encoded data, since the identifier indicating the target FEC encoding mode is not detected, the second device does not need to perform step 209, but directly adopts the D-PHY-based encoding method in step 210. The decoding mode corresponding to the auxiliary encoding mode decodes the received encoded data to obtain the initial data.

Optionally, before step 208, the first device may also use another encoding manner to encode the first encoded data to obtain encoded data (referred to as second encoded data) corresponding to the other encoding manner, in step 208 , the first device may send the second encoded data. For example, as shown in FIG. 10 , the second encoded data may include: a transmission start bit (Start of Transmission, SOT), the first encoded data, and an end of transmission bit (End of Transmission, EOT) arranged in sequence.

Correspondingly, if before step 208, the first device uses another encoding method to encode the first encoded data, then before step 209, the second device can use the decoding method corresponding to the other encoding method to encode the received code The data is decoded to obtain the first encoded data, and after that, step 209 is performed.

In another example, FIG. 11 is a flowchart of another data transmission method provided by an embodiment of the present application. In the data transmission method, the auxiliary encoding method is a high-definition multimedia interface (High-Definition Multimedia Interface, HDMI)-based encoding method. example. HDMI encoding technology includes: ECC encoding method, CRC encoding method and FEC encoding method. Since HDMI encoding technology includes FEC encoding method, the auxiliary encoding method based on HDMI includes: encoding method other than FEC encoding method in HDMI encoding technology , such as ECC encoding and CRC encoding.

As shown in Figure 11, the data transmission method includes:

Step 301: The first device sends test data to the second device through the channel between the first device and the second device.

For step 301, reference may be made to step 101, which is not repeated in this embodiment of the present application.

Step 302: The second device determines a state parameter of the channel according to the test data, where the state parameter is used to reflect the transmission situation of the test data.

For step 302, reference may be made to step 102, which is not repeated in this embodiment of the present application.

Step 303: The second device sends the state parameter to the first device through the channel.

For step 303, reference may be made to step 103, which is not repeated in this embodiment of the present application.

Step 304: The first device adds a prefix, data synchronization information (Sync), control/data information (C/D) and reserved bits (Rsvd) before the data block to be transmitted to obtain initial data.

The prefix is used to indicate that the type of data block (Payload) is Data Island (a data type) or Video Data (another data type). For example, the structure of the initial data is shown in FIG. 12 , and the initial data includes: prefix, Sync, C/D, Rsvd, and data block arranged in sequence.

Step 305: The first device encodes the initial data by using an HDMI-based auxiliary encoding manner to obtain target data.

Exemplarily, the first device may use the ECC encoding mode to encode the data block in the initial data to obtain an ECC error correction check code (which may include 6 bits), and use the CRC encoding mode to encode the data block in the initial data. Encoding obtains a CRC check code (which may include 16 bits). After that, the first device may add the ECC error correction check code and the CRC check code to the end of the data block in the initial data to obtain the target data. The structure of the target data is shown in Figure 13. The target data includes: prefix, Sync, C/D, Rsvd, data block, ECC error correction check code and CRC check code arranged in sequence.

Optionally, before using the HDMI-based auxiliary encoding method to encode the initial data, the first device may also determine that the state parameter satisfies the parameter conditions corresponding to the HDMI-based auxiliary encoding method. At this time, the first device is in the HDMI-based auxiliary encoding method. Before the encoding mode encodes the initial data, an identifier for indicating the HDMI-based auxiliary encoding mode may be added to the initial data. The initial data at this time is shown in Figure 14, and the identification of the auxiliary encoding method based on HDMI can be the packet loss rate confirmation field (Package Loss Rate_Ensure, PLR_EN) in Figure 14. The first device encodes the initial data by using an HDMI-based auxiliary encoding method, and the obtained target data may be as shown in FIG. 15 .

Step 306: The first device determines whether the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes, and the target FEC encoding mode is any one of the multiple FEC encoding modes. Step 307 is performed when the state parameter satisfies the parameter conditions corresponding to the target FEC encoding mode among the multiple FEC encoding modes.

When the state parameter does not meet the parameter conditions corresponding to the target FEC encoding mode, the first device does not need to use the target FEC encoding mode for encoding, and at this time, the first device can directly send the target data to the second device. The second device may directly use the decoding mode corresponding to the HDMI-based auxiliary encoding mode to decode the target data to obtain initial data, and perform step 311 .

For step 306, reference may be made to step 104, which is not repeated in this embodiment of the present application.

Step 307: The first device encodes the target data by using the target FEC encoding method to obtain first encoded data.

For step 307, reference may be made to step 105, which is not repeated in this embodiment of the present application.

Step 308: The first device sends the first encoded data to the second device through the channel.

For step 308, reference may be made to step 106, which is not repeated in this embodiment of the present application.

Step 309 , the second device decodes and corrects errors of the first encoded data by using the decoding mode corresponding to the target FEC encoding mode according to the identifier used to indicate the target FEC encoding mode in the encoding mode to obtain the target data.

For step 309, reference may be made to step 107, which is not repeated in this embodiment of the present application.

Step 310: The second device uses a decoding mode corresponding to the HDMI-based auxiliary encoding mode to decode the target data to obtain initial data.

The decoding process in which the second device adopts the decoding mode corresponding to the HDMI-based auxiliary encoding mode is an inverse process of the encoding process in which the first device adopts the HDMI-based auxiliary encoding mode.

In the process of decoding the encoded data by the decoding method corresponding to the HDMI-based auxiliary encoding method, if the second device finds that there is no error in the encoded data, it may perform a subsequent process based on the decoded data. If the second device finds that there is an error in the encoded data, and the second device can correct the error based on the decoding method, the second device can correct the error, and then execute the subsequent process based on the decoded data. If the second device cannot correct the error based on the decoding method, the second device may send the encoded data to the first device to trigger the first device to resend the data.

Optionally, if in step 305, the first device adds an identifier for indicating an HDMI-based auxiliary encoding method in the encoding process, then before step 310, the second device needs to detect whether the target data contains an identifier for indicating an HDMI-based auxiliary encoding method. The identifier of the auxiliary encoding method. The second device executes step 310 only when the target data includes an identifier for indicating an HDMI-based auxiliary encoding mode; otherwise, the second device skips step 310 and directly executes step 311 .

Step 311: The second device removes the prefix, Sync, C/D and Rsvd in the initial data to obtain a data block to be transmitted.

In the embodiment shown in FIG. 11 , an FEC encoding mode in which the state parameter meets the corresponding parameter condition is taken as an example. When the state parameter does not meet the parameter condition corresponding to each FEC encoding mode in the multiple FEC encoding modes , the first device does not need to perform steps 306 and 307, and in step 308 the first device sends the encoded data (such as the above target data) encoded by the auxiliary encoding method to the second device. After the second device receives the encoded data, since the identifier indicating the target FEC encoding mode is not detected, the second device does not need to perform step 309, but directly adopts the HDMI-based auxiliary encoding mode in step 310. In the corresponding decoding mode, the received encoded data is decoded to obtain initial data.

Optionally, before step 308, the first device may also use another encoding manner to encode the first encoded data to obtain encoded data (referred to as second encoded data) corresponding to the other encoding manner, in step 308 , the first device may send the second encoded data. For the structure of the second encoded data, reference may be made to FIG. 10 .

Correspondingly, if before step 308, the first device uses another encoding method to encode the first encoded data, then before step 309, the second device can use the decoding method corresponding to the other encoding method to encode the received first encoding data. The second encoded data is decoded to obtain the first encoded data, and then step 309 is performed.

In the above embodiments, the data transmission method provided by the embodiments of the present application is briefly described by taking the auxiliary coding mode based on D-PHY and the auxiliary coding mode based on HDMI as examples. Optionally, the auxiliary coding mode in the embodiment of the present application may also be replaced with an auxiliary coding mode based on C-PHY (a physical layer port in MIPI CSI-2), an auxiliary coding mode based on MIPI CSI-3, a Auxiliary encoding for Display Port (DP).

The auxiliary coding method based on C-PHY (a physical layer port in MIPI CSI-2) is similar to the auxiliary coding method based on D-PHY. However, in the auxiliary encoding method based on D-PHY, the ECC encoding method is used to encode the data type identifier, WC and VCX, and the ECC error correction check code is obtained, while the auxiliary encoding method based on C-PHY uses the CRC encoding method to encode the data type. symbol, WC and VCX encoding, to obtain the packet header CRC (Packet Header-CRC, PH-CRC) check code; and, in the C-PHY-based auxiliary coding method, the CRC check code obtained by using the CRC encoding method to encode the data block is called is: payload data CRC (Payload Data-CRC, PD-CRC) check code. The structure of the target data obtained by encoding the data block based on the auxiliary coding method of C-PHY can be shown in Figure 16. The target data includes: VCX, data type identifier, WC, PH-CRC check code, data arranged in sequence Block and PD-CRC check codes. The target data may include at least two sets of additional information arranged in sequence (including VCX, data type identifier, WC, and PH-CRC check code). In FIG. 16 , the target data includes two sets of additional information arranged in sequence as an example. Optionally, there may also be reserved bits between the VCX and the data type identifier, which are not shown in FIG. 16 .

The auxiliary coding method based on MIPI CSI-3 is similar to the auxiliary coding method based on MIPI CSI-2 (such as based on D-PHY in MIPI CSI-2). However, in the auxiliary encoding method based on MIPI CSI-3, additional information will be added before the data block, and the data block will be encoded by the International Telephone and Telegraph Consultative Committee (CCITT) CRC encoding method, and the CRC calibration method will be obtained. Check the code, and add the CRC check code to the end of the data block to obtain the target data. The additional information may include: Data Link Layer Control Symbol Identifier (ESC_DL), Start of Frame (Start of Frame, SOF), Traffic Type (Traffic Class, TC), reserved bits, ESC_DL, L2 layer service data unit end frame identifier (End of Frame for even L2 Service Data Unit, EOF_EVEN) and frame sequence number (Frame_seq.Number). 17, the target data includes: ESC_DL, SOF, TC, reserved bits, data blocks, ESC_DL, EOF_EVEN, frame serial number and CRC check code arranged in sequence.

The DP-based auxiliary encoding method is similar to the HDMI-based auxiliary encoding method. Therefore, the data transmission method using the DP-based auxiliary encoding method is the same as the data transmission method using the HDMI-based auxiliary encoding method (the method shown in Figure 11). similar. Wherein, in the data transmission method using the HDMI-based auxiliary encoding method, the step of encoding by using the FEC encoding method is performed by the physical layer in the first device, and in the data transmission method using the HDMI-based auxiliary encoding method, the step of using the FEC encoding method encoding is performed. The steps are performed by the link layer in the first device.

The above-mentioned first device and second device are both communication devices in the communication system provided by the embodiments of the present application, and the architecture of the communication device generally includes: a transaction layer, a link layer, and a physical layer arranged in sequence from top to bottom. The transaction layer can receive the data to be encoded from the application layer. The upper layer in the transaction layer, link layer and physical layer will transmit the received data to the lower layer. The data transmitted to the physical layer can be transmitted to other layers through the port of the physical layer. equipment. The data input from the port of the physical layer can be transmitted to the upper layer in turn, until it is transmitted from the transaction layer to the application layer.

In this embodiment of the present application, the step of encoding in the first device may be performed by at least one functional layer among a transaction layer, a link layer, and a physical layer. The encoding step may include: encoding using the target FEC encoding method, encoding using an auxiliary encoding method, and the like. The step of decoding in the second device may be performed by at least one functional layer of a transaction layer, a link layer and a physical layer. The step of decoding may include: a step of decoding and error correction using a decoding mode corresponding to the target FEC encoding mode, a step of decoding using a decoding mode corresponding to the auxiliary encoding mode, and the like. In this way, it is possible to perform error correction on errors in data transmission by at least one functional layer among the transaction layer, the link layer and the physical layer.

In the related art, the steps of encoding and decoding are performed by a certain functional layer (such as the link layer or the physical layer, etc.) in the communication device, so that it is impossible to realize the error when transmitting data to multiple functional layers in the communication device. Error correction. However, in this embodiment of the present application, when the encoding step in the first device may be performed by multiple functional layers in the transaction layer, the link layer, and the physical layer, the decoding step in the second device may be performed by the transaction layer, the link layer and the physical layer. When multiple functional layers in the physical layer are executed, error correction can be implemented for errors during data transmission by multiple functional layers in the transaction layer, the link layer and the physical layer.

The data transmission method provided by the present application is described in detail above with reference to FIGS. 1 to 17 . It can be understood that, in order to realize the functions described by the above methods, the device needs to include hardware and/or software corresponding to each function. module. In conjunction with the execution process of each method described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different ways to implement the described functionality for each particular application in conjunction with the embodiments, but such implementations should not be considered beyond the scope of this application.

In this embodiment, the corresponding device may be divided into functional modules according to the above method embodiments. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware. It should be noted that the division of modules in this embodiment is schematic, and specifically as a possible division manner of logical functions, there may be other division manners in actual implementation.

When the functional module division method is adopted, the communication device provided by the present application will be described below with reference to FIG. 18 and FIG. 19 .

FIG. 18 is a block diagram of a communication device provided by an embodiment of the application, and the communication device may belong to the first device in the foregoing embodiments, for example. The first device supports multiple FEC coding modes, and each of the FEC coding modes has corresponding parameter conditions. As shown in FIG. 18 , the communication device includes: an encoding module 1801 and a sending module 1802 .

The encoding module 1801 is configured to encode the target data by the first device using the target FEC encoding method to obtain the first encoded data when the state parameter of the channel between the first device and the second device satisfies the parameter conditions corresponding to the target FEC encoding method . Wherein, the target FEC encoding mode is one FEC encoding mode among multiple FEC encoding modes supported by the first device, and the first encoded data encoded by using the target FEC encoding mode carries: for indicating the target FEC encoding way identification. For the operations performed by the encoding module 1801, reference may be made to the content related to the first device in the foregoing step 105, step 207 and step 307.

The sending module 1802 is configured to send the first encoded data to the second device through the channel. For the operations performed by the sending module 1802, reference may be made to the content related to the first device in the foregoing step 106, step 208 and step 308.

In an optional solution, the encoding module 1801 is further configured to encode the initial data in the auxiliary encoding mode to obtain the target data before encoding the target data in the target FEC encoding mode. For the operations performed by the encoding module 1801, reference may be made to the content related to the first device in the foregoing steps 205 and 305.

In another optional solution, the encoding module 1801 is further configured to encode the first encoded data by using the auxiliary encoding method after encoding the target data by using the target FEC encoding method, to obtain second encoded data; at this time, the sending module 1802 may send the second encoded data to the second device through the channel, so as to send the first encoded data to the second device through the channel .

In another optional solution, the encoding module 1801 is further configured to encode the target data by using the auxiliary encoding manner to obtain third encoded data. The above-mentioned sending module 1802 is further configured to send the third encoded data to the second device through the channel.

Optionally, the above-mentioned sending module 1802 is further configured to send test data to the second device through the channel before the first device encodes the target data by using the target FEC encoding method, at least one of the status parameters. Some parameters are used to reflect the transmission of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application. For the operations performed by the sending module 1802, reference may be made to the content related to the first device in the foregoing steps 101, 201 and 301.

In an optional solution, the first device may further include a receiving module and a processing module (neither are shown in FIG. 18 ). The receiving module may be configured to receive the at least part of the parameters sent by the second device according to the test data after the sending module sends the test data to the second device through the channel. The processing module is configured to determine the state parameter according to the at least part of the parameters. For the operations performed by the receiving module, reference may be made to the content related to the first device in the foregoing steps 103 , 203 and 303 .

In another optional solution, the first device may further include a receiving module and a processing module (neither are shown in FIG. 18 ). The receiving module may be configured to receive the reference information of the at least part of the parameters sent by the second device according to the test data after the sending module sends the test data to the second device through the channel. The processing module is configured to obtain the state parameter according to the reference information.

Optionally, the first device may further include a receiving module (neither are shown in FIG. 18 ). The receiving module is configured to receive notification information sent by the second device through the channel before the encoding module uses the target FEC encoding method to encode the target data, where the notification information is used to indicate whether the state parameter satisfies the requirements. Describe the parameter conditions corresponding to the target FEC coding mode. The encoding module 1801 may use the target FEC encoding method to encode the target data when the notification information is used to indicate that the state parameter satisfies the parameter condition corresponding to the target FEC encoding method.

FIG. 19 is a block diagram of another communication device provided by an embodiment of the application. For example, the communication device may belong to the second device in the foregoing embodiments. The second device supports decoding modes corresponding to multiple FEC encoding modes, and each of the FEC encoding modes has corresponding parameter conditions. As shown in FIG. 19 , the communication device includes: a receiving module 1901 and a decoding module 1902 .

The receiving module 1901 is configured to receive the first encoded data sent by the first device through the channel between the first device and the second device. Wherein, the first encoded data carries: an identifier used to indicate the target FEC encoding mode. The target FEC coding mode is one of the multiple FEC coding modes, and the above-mentioned first coded data is that the state parameter of the channel between the first device and the second device of the first device satisfies the target FEC When the parameter conditions corresponding to the encoding mode are used, the data obtained by encoding the target FEC encoding mode is used. For the operations performed by the receiving module 1901, reference may be made to the content related to the second device in the foregoing step 106, step 208 and step 308.

The decoding module 1902 is configured to decode and error correct the first encoded data by using a decoding mode corresponding to the target FEC encoding mode according to the identifier carried by the first encoded data and used to indicate the target FEC encoding mode. For the operations performed by the decoding module 1902, reference may be made to the content related to the second device in the foregoing step 107, step 209 and step 309.

Optionally, the second device may not only support decoding modes corresponding to the above-mentioned multiple FEC encoding modes, but also support decoding modes corresponding to auxiliary encoding modes other than the multiple FEC encoding modes. This application does not limit the types of auxiliary coding modes, and the auxiliary coding modes may include one coding mode or multiple coding modes. For example, at least one of the CRC encoding method and the ECC encoding method, and the auxiliary encoding method may also include other FEC encoding methods different from the above-mentioned various FEC encoding methods.

In an optional solution, after decoding and error correction of the first encoded data, the decoding module 1902 may use a decoding mode corresponding to the auxiliary encoding mode to decode the target data. The target data is: data obtained by decoding and error-correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode. For the operations performed by the decoding module 1902, reference may be made to the content related to the second device in the above steps 210 and 310.

In another optional solution, the receiving module 1901 may receive the first encoded data by receiving the second encoded data sent by the first device. The second encoded data is data obtained by encoding the first encoded data by the first device using the auxiliary encoding manner. The decoding module 1902 may use the decoding mode corresponding to the auxiliary encoding mode to decode the second encoded data before decoding and error correcting the first encoded data using the decoding mode corresponding to the target FEC encoding mode to obtain the first encoded data.

In yet another optional solution, the foregoing receiving module 1901 is further configured to receive third encoded data sent by the first device through the channel. The above-mentioned decoding module 1902 is further configured to decode the third encoded data by using a decoding mode corresponding to the auxiliary encoding mode. Wherein, the third encoded data is data encoded by using the auxiliary encoding method.

Optionally, before receiving the first encoded data sent by the first device, the receiving module 1901 may also receive test data sent by the first device through the channel, and at least some of the parameters in the state parameters are to reflect the transmission of the test data. The test data may be service data carrying service information, or may not be service data (for example, test data without service information transmitted before service data transmission), which is not limited in this application.

In an optional solution, the communication device further includes a processing module and a sending module (neither are shown in FIG. 19 ). The processing module is configured to, after the receiving module receives the test data sent by the first device through the channel, determine the at least part of the parameters according to the test data. The sending module is configured to send the at least part of the parameters to the first device. In this way, the first device can acquire the at least part of the parameters. For operations performed by the processing module, reference may be made to the content related to the second device in the foregoing step 102 , step 202 and step 302 . For the operations performed by the sending module, reference may be made to the content related to the second device in the foregoing step 103 , step 203 and step 303 .

In another optional solution, the communication device further includes a processing module and a sending module (neither are shown in FIG. 19 ). The processing module is configured to, after receiving the test data sent by the first device through the channel, determine the reference information of the at least part of the parameters according to the test data. The sending module is configured to send the reference information to the first device. In this way, the first device can determine at least some of the above parameters according to the reference information.

Optionally, the communication device further includes a processing module and a sending module (neither are shown in FIG. 19 ), the processing module is configured to determine according to the state parameter before the receiving module receives the first encoded data sent by the first device. Whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode. The sending module may be configured to send notification information to the first device through the channel, where the notification information is used to indicate whether the state parameter satisfies the parameter condition corresponding to the target FEC coding mode.

In the case of using an integrated unit, the communication device for the first device or the second device provided by the present application may include a processing module, a storage module and a communication module. The processing module can be used to control and manage the actions of the communication device, for example, it can be used to support the communication device to perform the actions performed by the first device or the second device in the above steps 101 to 107, or it can be used to support The communication device performs the actions performed by the first device or the second device in the above steps 201 to 211 , or can be used to support the communication device to perform the actions performed by the first device or the second device in the above steps 301 to 311 . The memory module may be used to support the communication device to execute stored program codes and data, and the like. The communication module can be used for communication between the communication device and other devices.

The processing module may be a processor or a controller. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and the like. The storage module may be a memory. The communication module may specifically be a device that interacts with other devices, such as a radio frequency circuit, a Bluetooth chip, and a Wi-Fi chip.

In one embodiment, when the processing module is a processor, the storage module is a memory, and the communication module is a communication interface, the communication device involved in this embodiment may be a communication device having the structure shown in FIG. 2 . In an implementation manner, the above-mentioned modules and the like included in the communication device may be computer programs stored in the memory, and are called by the processor to implement the corresponding execution functions of the modules.

An embodiment of the present application further provides a communication system, where the communication system includes the above-mentioned first device and the second device.

The embodiments of the present application provide a computer storage medium, where a computer program is stored in the storage medium; when the computer program runs on the computer, the computer program enables the computer to execute any one of the data transmission methods provided by the embodiments of the present application. A method performed by a device or a second device.

The embodiments of the present application also provide a computer program product containing instructions, when the computer program product runs on the communication device, the communication device is made to execute any one of the data transmission methods provided in the embodiments of the present application by the first device or the third device. 2. The method performed by the device.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product comprising one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website, computer, server, or data The center transmits to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media, or semiconductor media (eg, solid state drives), and the like.

In this application, the terms "first" and "second" etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance. The term "at least one" refers to one or more, and "plurality" refers to two or more, unless expressly limited otherwise.

Different types of embodiments such as method embodiments and device embodiments provided in the embodiments of the present application may refer to each other, which is not limited in the embodiments of the present application. The sequence of operations of the method embodiments provided in the embodiments of the present application can be appropriately adjusted, and the operations can also be increased or decreased according to the situation. All methods should be covered within the protection scope of the present application, and therefore will not be repeated here.

In the corresponding embodiments provided in the present application, it should be understood that the disclosed systems, devices, etc. may be implemented by other structural manners. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another A system, or some feature, can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or modules, and may be in electrical or other forms.

Units described as separate components may or may not be physically separated, and components described as units may or may not be physical units, and may be located in one place or distributed to multiple devices. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in the present application. Modifications or substitutions shall be covered by the protection scope of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A data transmission method, characterized in that it is used in a first device, the first device supports multiple forward error correction FEC coding modes, each of the FEC coding modes has corresponding parameter conditions, and the method includes :

When the state parameter of the channel between the first device and the second device satisfies the parameter condition corresponding to the target FEC encoding mode, the target FEC encoding mode is used to encode the target data to obtain first encoded data; wherein the The target FEC encoding mode is one of the multiple FEC encoding modes, and the first encoded data carries an identifier used to indicate the target FEC encoding mode;

The first encoded data is sent to the second device over the channel.
The method according to claim 1, wherein the codeword lengths of the multiple FEC coding modes have a linear relationship.
The method according to claim 1 or 2, wherein the first device further supports an auxiliary encoding mode, and before encoding the target data by using the target FEC encoding mode, the method further comprises:

The initial data is encoded in the auxiliary encoding manner to obtain the target data.
The method according to claim 1 or 2, wherein the first device further supports an auxiliary encoding mode, and after encoding the target data by using the target FEC encoding mode, the method further comprises:

Encoding the first encoded data using the auxiliary encoding method to obtain second encoded data;

Sending the first encoded data to the second device through the channel includes:

The second encoded data is sent to the second device over the channel.
The method according to claim 1 or 2, wherein the first device further supports an auxiliary coding mode, and the method further comprises:

The auxiliary data is encoded using the auxiliary encoding method to obtain third encoded data;

The third encoded data is sent to the second device over the channel.
The method according to any one of claims 1 to 5, wherein the state parameters include: bit error rate, packet loss rate, insertion loss, return loss, channel noise, baud rate and data transmission rate at least one.
The method according to any one of claims 1 to 6, wherein before using the target FEC encoding method to encode the target data, the method further comprises:

Send test data to the second device through the channel, and at least some of the parameters in the state parameters are used to reflect the transmission situation of the test data.
A data transmission method, characterized in that it is used in a second device, the second device supports a plurality of decoding modes corresponding to forward error correction (FEC) coding modes, and each of the FEC coding modes has corresponding parameter conditions, The method includes:

When the state parameter of the channel between the first device and the second device satisfies the parameter conditions corresponding to the target FEC coding mode, the channel between the first device and the second device is used to receive the data sent by the first device. The first encoded data; wherein, the target FEC encoding mode is an FEC encoding mode among the multiple FEC encoding modes, and the first encoded data carries: the identifier of the target FEC encoding mode;

According to the identifier of the target FEC encoding mode, a decoding mode corresponding to the target FEC encoding mode is used to decode and error correct the first encoded data.
The method according to claim 8, wherein the codeword lengths of the multiple FEC coding modes have a linear relationship.
The method according to claim 8 or 9, wherein the second device further supports a decoding mode corresponding to the auxiliary encoding mode, and when the decoding mode corresponding to the target FEC encoding mode is adopted, the first encoded data After decoding and error correction, the method further includes:

Decode the target data by using the decoding mode corresponding to the auxiliary encoding mode;

The target data is: data obtained by decoding and error-correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode.
The method according to claim 8 or 9, wherein the second device further supports a decoding mode corresponding to an auxiliary encoding mode, and receives the first encoded data sent by the first device, comprising:

receiving second encoded data sent by the first device, where the second encoded data is data obtained by the first device encoding the first encoded data in the auxiliary encoding manner;

Before using the decoding mode corresponding to the target FEC encoding mode to decode and error correct the first encoded data, the method further includes:

The second encoded data is decoded by using a decoding mode corresponding to the auxiliary encoding mode to obtain the first encoded data.
The method according to claim 8 or 9, wherein the second device further supports a decoding mode corresponding to the auxiliary encoding mode, and the method further comprises:

receiving third encoded data sent by the first device through the channel, where the third encoded data is data encoded by using the auxiliary encoding method;

The third encoded data is decoded by using a decoding mode corresponding to the auxiliary encoding mode.
The method according to any one of claims 8 to 12, wherein the state parameters include: bit error rate, packet loss rate, insertion loss, return loss, channel noise, baud rate and data transmission rate at least one.
The method according to any one of claims 8 to 13, wherein before the receiving the first encoded data sent by the first device, the method further comprises:

The test data sent by the first device is received through the channel, and at least part of the parameters in the state parameters are used to reflect the transmission situation of the test data.
A communication device, characterized in that the communication device is a first device, the first device supports multiple forward error correction (FEC) coding modes, each of the FEC coding modes has corresponding parameter conditions, the Communication equipment includes:

an encoding module, configured to use the target FEC encoding method to encode the target data when the state parameter of the channel between the first device and the second device satisfies the parameter conditions corresponding to the target FEC encoding method to obtain the first encoded data ; Wherein, the target FEC encoding mode is a FEC encoding mode in the multiple FEC encoding modes, and the first encoded data carries an identifier for indicating the target FEC encoding mode;

A sending module, configured to send the first encoded data to the second device through the channel.
The communication device according to claim 15, wherein the codeword lengths of the multiple FEC coding modes have a linear relationship.
The communication device according to claim 15 or 16, wherein the first device further supports an auxiliary encoding mode, and the encoding module is further configured to:

Before encoding the target data using the target FEC encoding method, encoding the initial data using the auxiliary encoding method to obtain the target data.
The communication device according to claim 15 or 16, wherein the first device further supports an auxiliary encoding mode, and the encoding module is further configured to:

After encoding the target data by using the target FEC encoding mode, encoding the first encoded data by using the auxiliary encoding mode to obtain second encoded data;

The sending module is configured to send the second encoded data to the second device through the channel.
A communication device, characterized in that the communication device is a second device, the second device supports multiple decoding modes corresponding to forward error correction (FEC) encoding modes, and each of the FEC encoding modes has corresponding parameters condition, the communication device includes:

a receiving module, configured to receive the channel between the first device and the second device through the channel between the first device and the second device when the state parameter of the channel between the first device and the second device meets the parameter conditions corresponding to the target FEC coding mode The first encoded data sent by the first device; wherein the target FEC encoding mode is one of the multiple FEC encoding modes, and the first encoded data carries: the target FEC encoding mode identification;

A decoding module, configured to decode and error correct the first encoded data by using a decoding mode corresponding to the target FEC encoding mode according to the identifier of the target FEC encoding mode.
The communication device according to claim 19, wherein the codeword lengths of the multiple FEC coding modes have a linear relationship.
The communication device according to claim 19 or 20, wherein the second device further supports a decoding mode corresponding to an auxiliary encoding mode, and the decoding module is further configured to:

After the first encoded data is decoded and error-corrected by using the decoding mode corresponding to the target FEC encoding mode, the target data is decoded by using the decoding mode corresponding to the auxiliary encoding mode;

The target data is: data obtained by decoding and error-correcting the first encoded data by using a decoding mode corresponding to the target FEC encoding mode.
The method according to claim 19 or 20, wherein the second device further supports a decoding mode corresponding to an auxiliary encoding mode, and the receiving module is configured to: receive the second encoded data sent by the first device, The second encoded data is data obtained by encoding the first encoded data by the first device using the auxiliary encoding manner;

The encoding module is further configured to: use the decoding mode corresponding to the auxiliary encoding mode to perform decoding and error correction on the second encoded data before using the decoding mode corresponding to the target FEC encoding mode to perform decoding and error correction on the first encoded data. The encoded data is decoded to obtain the first encoded data.
A communication device, characterized in that the communication device comprises: a processor and a memory, wherein a program is stored in the memory;

The processor is configured to call a program stored in the memory, so that the communication device executes the data transmission method according to any one of claims 1 to 7.
A communication device, characterized in that the communication device comprises: a processor and a memory, wherein a program is stored in the memory;

The processor is configured to call a program stored in the memory, so that the communication device executes the data transmission method according to any one of claims 8 to 14.
A communication system, characterized in that the communication system includes: a first device and a second device;

The first device is the communication device according to any one of claims 15 to 18, and the second device is the communication device according to any one of claims 19 to 22;

Alternatively, the first device is the communication device of claim 23 , and the second device is the communication device of claim 24 .
A computer-readable storage medium, wherein a computer program is stored in the storage medium;

When the computer program runs on a computer, the computer executes the data transmission method according to any one of claims 1 to 7;

Alternatively, when the computer program runs on a computer, the computer causes the computer to execute the data transmission method described in any one of claims 8 to 14 .