WO2022193065A1

WO2022193065A1 - Data transmission method and apparatus

Info

Publication number: WO2022193065A1
Application number: PCT/CN2021/080777
Authority: WO
Inventors: 张兴新
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: CN116601897A

Abstract

Disclosed in the present application are a data transmission method and apparatus, which can be used for assisted driving and autonomous driving, and are used for solving the problem of incorrect retransmission of a PHY code block caused by PHY clock desynchronization. The method comprises: generating first information, and sending the first information, wherein the first information comprises first PID synchronization information, and the first PID synchronization information is used for PID synchronization. In the embodiments of the present application, a first device sends PID synchronization information to a second device, such that the second device can calibrate a PID count according to the PID synchronization information, and thus a data receiving end can correctly indicate, by using a calibrated PID, a PHY code block which is incorrectly transmitted, and incorrect retransmission can then be avoided. Furthermore, the method can be applied to the Internet of Vehicles, such as vehicle to everything (V2X), long term evolution-vehicle (LTE-V) and vehicle to vehicle (V2V).

Description

A data transmission method and device

technical field

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

Background technique

In high-speed wired transmission, especially in some vehicle-mounted serializer/deserializer (SerDes) transmission, due to high bit error rate (BER) requirements, retransmission is usually considered to improve the transmission chain reliability of the road.

In SerDes transmission, the originator (the first device) sends physical layer (PHY) code blocks sequentially, one PHY code block is a physical layer Reed Solomon error correction code block (physical layer RS-FEC block, PLRB), and A PHY code block carries a physical layer content block (PLCB). When the transmission of the PHY code block fails, the receiving end (the second device) sends an acknowledgment message (ACK) to the first device, and indicates the failed PHY code block through the PLRB ID (PLRB Identifier, PID) information carried in the ACK. The first device encapsulates the PLCB carried by the failed PHY code block into a new PHY code block and sends it to the second device to complete the retransmission. For example, when the transmission of the PHY code block 2 fails, the second device sends an ACK to the first device, and indicates that the PHY code block 2 fails to receive through the PID information carried in the ACK. The first device encapsulates the PLCB 2 carried by the PHY code block 2 into the PHY code block 5 and sends it to the second device to complete the retransmission.

In SerDes transmission, the first device and the second device realize clock synchronization of the PHY code block during the link establishment process, so as to determine the number of the PHY code block according to the clock count. In jammer scenarios, longer duration jammers can cause PHY clock desynchronization. The PHY clock desynchronization may cause the second device to inaccurately count the PHY code blocks, thereby causing errors in the retransmission of the PHY code blocks.

SUMMARY OF THE INVENTION

The present application provides a data transmission method and device, which are used to solve the problem of errors in retransmission of PHY code blocks caused by PHY clock desynchronization.

In a first aspect, an embodiment of the present application provides a data transmission method, including: generating and sending first information, where the first information includes first PID synchronization information, and the first PID synchronization information is used for PID synchronization.

In this embodiment of the present application, the first device sends the PID synchronization information to the second device, so that the second device can calibrate the PID count according to the PID synchronization information, so that the data receiving end uses the PHY code block indicated by the PID information to communicate with the data transmitting end according to the PID The PHY code blocks determined by the information are consistent, thereby avoiding erroneous retransmission.

In one possible design, the PID synchronization includes PID count synchronization between the first device and the second device. In the above design, the first device and the second device can perform PID count synchronization through the PID synchronization information, so that the first device and the second device can determine the same PHY code block through the PID, thereby avoiding erroneous retransmission.

In a possible design, the first information is a synchronization symbol, the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information. In the above design, by multiplexing the periodically sent synchronization symbols, the data receiving end can complete the PID count synchronization while recovering the PHY code block delimitation and scrambling code synchronization, thereby avoiding erroneous retransmission after link recovery.

In a possible design, the synchronization symbol further includes a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the first value indicates that the time base field carries the first value. PID synchronization information. In the above manner, the first value is used as the synchronization symbol to carry the identifier of the PID synchronization information, so that the second device can read the PID synchronization information in the time base field when the time base number indicated by the time base ID field is the first value.

In a possible design, the first PID synchronization information is used to indicate the PID of the PLRB sent before the first information; or, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information. In the above design, by indicating the PID of a PLRB at a specific location, the first device enables the second device to calibrate the PID of the PLRB, thereby realizing PID counting synchronization.

In a possible design, the first information is a PLRB, the PLRB includes a physical layer content block (PLCB) payload field, and the PLCB payload field carries the first PID synchronization information. In the above-mentioned embodiments, the PHY control message can be used to carry the PID synchronization information, so that the PID synchronization can be realized, thereby avoiding erroneous retransmission.

In a possible design, the first PID synchronization information is the PID of the first information. In the above design, by carrying the PID of the first information in the first information, the second device can calibrate the PID count of the first information after receiving the first information.

In a possible design, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, and the second field indicates that the type of the non-data information is PID synchronization information , and the third field carries the first PID synchronization information. The above design uses the PHY control information to carry the first PID synchronization information, so that the second device indicates that the first information carries non-data information in the first field, and the second field indicates that the type of the non-data information is PID synchronization information. When the type of PID synchronization information is read in the third field Take the first PID synchronization information.

In a possible design, the third field includes a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message. In the above design, the response message and the request message can be distinguished through the first subfield.

In a possible design, before generating the first information, the method further includes: receiving second information, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information. In the above design, the first information may be sent at the request of the second device.

In a possible design, the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information. In the above embodiment, the PHY control message can be used to carry the second PID synchronization information, so that the PID synchronization can be realized, thereby avoiding erroneous retransmission.

In a possible design, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second information carries non-data information, and the second field indicates that the type of the non-data information is PID synchronization information , and the third field carries the second PID synchronization information. The above design uses the PHY control information to carry the second PID synchronization information, so that the second device indicates that the first information carries non-data information in the first field, and the second field indicates that the type of the non-data information is PID synchronization information. Take the second PID synchronization information.

In a possible design, the third field includes a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message. In the above design, the response message and the request message can be distinguished through the first subfield.

In a possible design, the third field further includes a second subfield and at least one of the following subfields: a third subfield and a fourth subfield; wherein the second subfield is used to carry the PID of the corresponding PLRB , the third subfield is used to indicate the transmission direction for PID synchronization; the fourth subfield is used to indicate the transmission direction of the corresponding PLRB. Through the above design, the accuracy of PID synchronization can be improved.

In a second aspect, an embodiment of the present application provides a data transmission method, including: generating and sending at least two code blocks, the at least two code blocks each carry a physical layer content block (PLCB), and the at least two code blocks At least one of the first code blocks carries control information of PLCB, the control information of PLCB includes identification information of PLCB and corresponding indication information, the indication information indicates that PLCB is the Nth transmission, and N is a positive integer.

In the embodiment of the present application, the PHY code block is determined by the identifier of the PLCB and the number of times the PLCB is retransmitted, so that the second device can accurately indicate the transmission error PHY code block, thereby avoiding retransmission errors. And, in this way, the two ends of the transceiver can no longer maintain the PID.

In a possible design, the first code block is a PLRB, the first code block includes a PLCB control field, and the PLCB control field carries control information of the PLCB. In the above embodiment, the PLCB control field may be used to carry the control information of the PLCB.

In a possible design, the method further includes: receiving a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, The identification information of the first PLCB is the ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, M is a positive integer, and the reception status information indicates the reception status of at least two code blocks; according to The retransmission information determines a PLCB that fails to transmit among the PLCBs carried by at least two code blocks. In the above design, by carrying the retransmission information in the second code block, the first device can determine a PHY code block according to the retransmission information, so that the PHY code block with transmission error can be determined according to the PHY code block.

In a possible design, the second code block is PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries retransmission information. In the above embodiment, the PLCB payload field may be used to carry the retransmission information.

In a possible design, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, and the second field indicates that the type of the non-data information is transmission acknowledgement information, the third field carries retransmission information. In the above design, the retransmission information is carried by the PHY control information, so that the second device indicates that the second code block carries non-data information in the first field, and the second field indicates that the type of non-data information is read in the third field when the type of non-data information is transmission confirmation information Retransmit information.

In a possible design, the third field also indicates the error feedback type, the error feedback type is complete error feedback or partial error feedback, the complete error feedback indicates that the receiving state indicates all second PLCBs that receive errors, and the partial error feedback indicates that the receiving The status indicates only the second PLCB that partially received the error. Through the above design, the second device can determine the feedback range.

In a third aspect, an embodiment of the present application provides a data transmission method, including: receiving first information and performing PID synchronization according to the first PID synchronization information, where the first information includes a first physical layer Reed Solomon error correction coding block identifier PID Synchronization information, the first PID synchronization information is used for PID synchronization.

In a possible design, the synchronization symbol further includes a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the first value indicates that the time base field carries the first value. PID synchronization information. In the above-mentioned manner, the first value is used as the synchronization symbol to carry the identification of the PID synchronization information, so that the second device can read the PID synchronization information in the time base field when the time base number indicated by the time base ID field is the first value.

In a possible design, before receiving the first information, the method further includes: sending second information, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information. In the above design, the first information may be sent at the request of the second device.

In a possible design, before generating the first information, the method further includes: receiving second information, where the second information carries the second PID synchronization information. In the above embodiment, the PHY control message can be used to carry the second PID synchronization information, so that the PID synchronization can be realized, thereby avoiding erroneous retransmission.

In a fourth aspect, an embodiment of the present application provides a data transmission method, including: receiving at least two code blocks, wherein the at least two code blocks each carry a physical layer content block PLCB, and at least one of the at least two code blocks is a first A code block carries control information of PLCB, the control information of PLCB includes identification information of PLCB and corresponding indication information, the indication information indicates that PLCB is the Nth transmission, and N is a positive integer; the control information of at least one PLCB is determined.

In a possible design, the method further includes: sending a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, The identification information of the first PLCB is the ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, M is a positive integer, and the reception status information indicates the reception status of at least two code blocks. In the above design, by carrying the retransmission information in the second code block, the first device can determine a PHY code block according to the retransmission information, so that the PHY code block with transmission error can be determined according to the PHY code block.

In a possible design, the second code block is PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries retransmission information.

In a fifth aspect, the present application provides a data transmission apparatus, which may be a communication device, or a chip or a chipset in the communication device. The apparatus may include a processing unit and a transceiving unit. When the apparatus is a communication device, the processing unit may be a processor, and the transceiver unit may be a transceiver; the apparatus may further include a storage module, which may be a memory; the storage module is used for storing instructions, and the processing unit The instructions stored in the storage module are executed to execute the method of the first aspect or any design of the first aspect, the second aspect or any design of the second aspect. When the device is a chip or a chipset in a communication device, the processing unit may be a processor, and the transceiver unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage module to A method of performing the above first aspect or any design of the first aspect, the second aspect or any design of the second aspect. The storage module may be a storage module (eg, register, cache, etc.) within the chip or chipset, or may be a storage module (eg, read-only memory, random access memory, etc.) located outside the chip or chipset within the communication device memory, etc.).

In a sixth aspect, the present application provides a data transmission apparatus, which may be a communication device, or a chip or a chipset in the communication device. The apparatus may include a processing unit and a transceiving unit. When the apparatus is a communication device, the processing unit may be a processor, and the transceiver unit may be a transceiver; the apparatus may further include a storage module, which may be a memory; the storage module is used for storing instructions, and the processing unit The instructions stored in the storage module are executed to execute the method of the third aspect or any design in the third aspect, the fourth aspect or any design in the fourth aspect. When the device is a chip or a chipset in a communication device, the processing unit may be a processor, the transceiver unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage module to A method of performing the above third aspect or any design of the third aspect, the fourth aspect or any design of the fourth aspect. The storage module may be a storage module (eg, register, cache, etc.) within the chip or chipset, or may be a storage module (eg, read-only memory, random access memory, etc.) located outside the chip or chipset within the communication device memory, etc.).

In a seventh aspect, the present application provides a data transmission device, including: a processor, and may also include a communication interface and a memory. The communication interface is used to transfer information, and/or messages, and/or data between the device and other devices. The memory is used for storing computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes the first aspect or any one of the first aspect or the second aspect. or the method designed in any one of the second aspects.

In an eighth aspect, the present application provides a data transmission device, including: a processor, and may also include a communication interface and a memory. The communication interface is used to transfer information, and/or messages, and/or data between the device and other devices. The memory is used to store computer-executable instructions, and when the apparatus is running, the processor executes the computer-executable instructions stored in the memory, so that the apparatus executes the third aspect or any one of the third aspect and the fourth aspect. or the method designed in any one of the fourth aspects.

In a ninth aspect, an embodiment of the present application provides a data transmission system, including the data transmission device in the fifth aspect and the data transmission device in the sixth aspect.

In a tenth aspect, an embodiment of the present application provides a data transmission system, including the data transmission device in the seventh aspect and the data transmission device in the eighth aspect.

In an eleventh aspect, the embodiments of the present application further provide a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer is made to execute any one of the first to fourth aspects above. The method of any one aspect, or any aspect.

In a twelfth aspect, the embodiments of the present application further provide a computer program product including instructions, which, when run on a computer, cause the computer to execute any one of the above-mentioned first to fourth aspects, or any one of the above-mentioned aspects. A design method.

In a thirteenth aspect, an embodiment of the present application further provides a communication system, the system includes a sending node and a receiving node, wherein the sending node can execute the first aspect or the corresponding method in any design of the first aspect, and the receiving node can A method corresponding to the third aspect or any of the designs of the third aspect is performed.

In a fourteenth aspect, an embodiment of the present application further provides a communication system, the system includes a sending node and a receiving node, wherein the sending node can execute the second aspect or any of the corresponding methods in the second aspect, and the receiving node can A method corresponding to the fourth aspect or any of the designs of the fourth aspect is performed.

A fifteenth aspect, a chip provided by an embodiment of the present application, the chip includes at least one processor and a communication interface, the processor is coupled to a memory, and is configured to read a computer program stored in the memory to execute the above-mentioned first to fourth aspects A method of any of the aspects, or any design of any of the aspects.

It should be noted that, "coupled" in the embodiments of the present application means that two components are directly or indirectly combined with each other.

A sixteenth aspect, an embodiment of the present application provides a vehicle, the vehicle includes a first device and/or a second device, the first device is used to execute the first aspect or the method designed in any one of the first aspects, the second device An apparatus for performing the method of the preceding third aspect or any one of the designs of the third aspect.

A seventeenth aspect, an embodiment of the present application provides a vehicle, the vehicle includes a first device and/or a second device, the first device is used to execute the second aspect or the method designed in any one of the second aspects, the second device An apparatus for performing the method of the preceding fourth aspect or any one of the designs of the fourth aspect.

Description of drawings

FIG. 1 is a schematic diagram of data transmission according to an embodiment of the present application;

2 is a schematic diagram of a PLRB format provided by an embodiment of the present application;

3 is a schematic diagram of a synchronization symbol transmission provided by an embodiment of the present application;

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

FIG. 5 is a schematic flowchart of a data transmission method provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of data transmission provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application.

Detailed ways

The terms "comprising" and "having" in the description, claims and drawings of the embodiments of the present application and any modifications thereof are intended to cover non-exclusive inclusion, for example, a process or method including a series of steps or units The processes, systems, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

The embodiments of the present application may be applicable to wired transmission, for example, may be applicable to wired point-to-point high-speed transmission, such as image and control transmission between a camera and a multi-domain controller (MDC) of an autonomous driving platform, a vehicle-mounted camera or a cockpit domain controller ( cockpit domain controller or control domain cockpit, CDC) and other in-vehicle equipment and large-screen image transmission, etc.

For example, the communication device involved in this embodiment of the present application may be a device capable of sending information (such as data frames, control information, etc.) to other devices, such as a camera, a lidar, or other vehicle-mounted image sensor, or may also be an MDC, CDC, etc. An image processing device, or an image display device such as a large screen. For another example, the communication device involved in the embodiments of the present application may also be other transmission devices other than the vehicle-mounted device.

In the embodiments of the present application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or", which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or, a and b and c, where a, b, c can be single or multiple.

And, unless otherwise stated, ordinal numbers such as “first” and “second” mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc. For example, the first data packet and the second data packet are only names given for convenience of description, and the two data packets may be the same data packet or may be different data packets.

The following describes the technical features involved in the embodiments of the present application.

In high-speed wired transmission, especially in some vehicle SerDes transmission, due to high BER requirements, in addition to the PHY layer using error correction and error detection coding (such as reed-solomon forward error correction, RS-FEC), the Consider improving the reliability of the transmission link by means of retransmission.

In SerDes transmission, usually two-way transmission is carried out at the same time. For the convenience of description, a transmission direction is selected below, the transmitting end of the transmission direction is the first device, and the receiving end is the second device.

The first device sequentially sends PHY code blocks, one PHY code block is one PLRB, and one PHY code block carries one PLCB. When the transmission of the PHY code block fails, the second device sends an ACK to the first device, and indicates, through the PID information carried in the ACK, the failed PHY code block to receive. The first device encapsulates the PLCB carried by the failed PHY code block into a new PHY code block and sends it to the second device to complete the retransmission. For example, when the transmission of the PHY code block 2 fails, the second device sends an ACK to the first device, and indicates that the PHY code block 2 fails to receive through the PID information carried in the ACK. The first device encapsulates the PLCB 2 carried by the PHY code block 2 into the PHY code block 5 and sends it to the second device to complete the retransmission, as shown in FIG. 1 .

In SerDes transmission, using clock and data recovery (CDR) technology, the first device and the second device realize PHY clock synchronization during link establishment. The first device and the second device count the PHY code block according to the PHY clock, so that the PID of the PHY code block can be determined according to the count of the PHY code block.

In a jamming scenario, a longer duration jamming may cause the PHY clock of the second device to desynchronize. On the other hand, the PHY clock is out of synchronization, which may cause the second device to inaccurately count the PHY code blocks. Since the second device uses the PID in the ACK to indicate the erroneously transmitted PHY code block, the first device is triggered to retransmit. Therefore, PHY clock desynchronization can cause errors in retransmission of PHY code blocks.

Based on this, the embodiments of the present application provide a data transmission method and apparatus, which are used to solve the problem of errors in retransmission of PHY code blocks caused by PHY clock desynchronization. Among them, the method and the device are based on the same technical concept. Since the principles of the method and the device for solving problems are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated. The embodiments of the present application provide an information transmission method and device, which can be applied to an in-vehicle network, especially an in-vehicle network of a smart car, and can also be applied to other wired transmission devices.

Hereinafter, the PHY code blocks in the embodiments of the present application will be explained to facilitate understanding by those skilled in the art.

1) PHY code block

One PHY code block is one PLRB, and the PLRB includes a PLRB payload field and a PLRB redundancy field. The PLRB payload field includes a PLCB control field and a PLCB payload field, and may also include a cyclic redundancy check (cyclic redundancy check, CRC) field. Wherein, the PLCB control field may include a PLCB ID to uniquely identify the PLCB.

The PLCB payload field may include one or more information blocks, and the information blocks may use 64/66 line coding or 64/65 line coding, or may also be other coding methods, which are not specifically limited here. Wherein, an information block includes an indication bit and a payload field, wherein the indication bit may indicate the type of information carried in the payload field, and the information type may be divided into data information and non-data information.

For example, taking a 2-bit indication bit as an example, the content indicated by the indication bit may be as shown in Table 1.

Table 1

指示位indicator bit	含义meaning
0000	负荷字段携带数据帧的中间分片The payload field carries the intermediate fragment of the data frame
0101	负荷字段携带数据帧的第一个分片The payload field carries the first fragment of the data frame
1010	负荷字段携带数据帧的最后一个分片The payload field carries the last fragment of the data frame
1111	负荷字段携带非数据信息，如子控制位、PHY控制信息等The payload field carries non-data information, such as sub-control bits, PHY control information, etc.

Taking a 1-bit indication bit as an example, the content indicated by the indication bit may be as shown in Table 2.

Table 2

指示位indicator bit	含义meaning
00	负荷字段携带数据帧The payload field carries the data frame
11	负荷字段携带非数据信息，如子控制位、PHY控制信息等The payload field carries non-data information, such as sub-control bits, PHY control information, etc.

If the indication bit indicates that the payload field carries non-data information, the payload field may include a sub-indication field and a content field, the sub-indication bit may indicate the type of non-data information, and the content field may carry non-data information. For example, at present, the content indicated by the sub-indication bit may be as shown in Table 3.

table 3

子指示位sub-indicator	非数据信息的类型Types of non-data information
0x1e0x1e	PHY PaddingPHY Padding
0x2d0x2d	PHY重传(ACK)PHY Retransmission (ACK)
0x3c0x3c	链路重建link re-establishment
0x4b0x4b	间歇训练interval training
0x5a0x5a	休眠hibernate
其他other	预留reserved

The ACK in FIG. 1 can be a kind of non-data information, which is carried by the PHY code block and sent by the second device to the first device. Similar to the acknowledgment message of the PHY code block sent by the second device to the first device, then It is carried by the PHY code block sent by the first device to the second device.

Exemplarily, the PLRB may be as shown in FIG. 2 .

It should be understood that the names, values, and corresponding relationships of indicated contents of the above fields are only exemplary descriptions.

2) Sync symbol

In order to achieve fast link recovery and periodically calibrate the pixel clocks at both ends of the transceiver, synchronization symbols are periodically sent in the SerDes transmission scheme, as shown in Figure 3. The synchronization symbol carries delimiter, random scrambling and pixel clock information. Among them, the starting position of the PHY can be aligned by calibrating the pixel clock.

Exemplarily, the fields included in the synchronization symbol may be as shown in Table 4.

Table 4

It should be understood that all the fields described in Table 4 above may be included in the synchronization symbol, or only some of the fields may be included in the synchronization symbol. In addition, the synchronization symbol may also include other fields not shown in Table 4, which will not be described one by one here.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Example 1:

The present application provides a data transmission method. As shown in Figure 4, the method includes:

S401. The first device generates first information, where the first information includes first PID synchronization information, where the first PID synchronization information is used for PID synchronization.

In one exemplary illustration, PID synchronization may include synchronization of PID counts between the first device and the second device.

S402, the first device sends the first information. Correspondingly, the second device receives the first information.

S403, the second device performs PID count synchronization according to the first PID synchronization information.

The first device may be a data sending end, and the second device may be a data receiving end. Alternatively, the first device may also be a data receiving end, and the second device may be a data transmitting end. The "data" may be understood as service data, such as image data, video data, and the like.

It can be understood that the data sender and the data receiver are only a logical distinction. In specific scenarios, the roles of the data sender and the data receiver can also be interchanged. For example, when A sends data to B, A is used as the data. Sending end, B acts as the data receiving end, when B sends data to A, B acts as the data transmitting end, and A acts as the data receiving end.

Reed-solomon forward error correction (RS-FEC) can be used for both the PHY code block sent by the data transmitter to the data receiver and the PHY code block sent by the data receiver to the data transmitter. The length and basis of the Reed-Solomon (RS) encoding of the PHY code block sent by the data transmitting end to the data receiving end and the PHY code block sent by the data receiving end to the data transmitting end can be different, and the basis can be understood as The unit length of the symbols included in the PHY code block. For example, the PHY code block sent by the data transmitter to the data receiver can use RS-FEC (340, 312, 10), and the PHY code block sent by the data receiver to the data transmitter can use RS-FEC (76, 72, 8) , where RS-FEC(340, 312, 10) may refer to the fact that the PHY code block includes 340 symbols, the number of symbols carrying valid data is 312, and the unit length of the symbols is 10 bits; RS-FEC(76, 72, 8) may refer to the PHY code block including 76 symbols, wherein the number of symbols carrying valid data is 72, and the unit length of the symbols is 8 bits. For the convenience of description, the PHY code block sent by the data transmitting end to the data receiving end is called the forward PHY code block, and the sending of the data transmitting end to the data receiving end is called forward transmission. The PHY code block sent by the data receiving end to the data sending end is called the reverse PHY code block, and the sending of the data receiving end to the data sending end is called reverse transmission.

In a possible implementation manner, the first information may be a synchronization symbol. The first PID synchronization information may be carried in the time base field of the synchronization symbol.

Exemplarily, taking the synchronization symbol including the fields described in Table 4 as an example, the first information may be as shown in Table 5.

table 5

It should be understood that all the fields described in Table 5 above may be included in the first information, or only some of the fields may be included in the first information. In addition, the first information may also include other fields not shown in Table 5, which will not be described one by one here.

Optionally, the time base number indicated by the time base ID field in the synchronization signal is a first value, and the first value indicates that the time base field carries the first PID synchronization information. For example, the time base number indicated by the time base ID field in the synchronization signal is 0000, and the time base number of 0000 indicates that the time base field carries the first PID synchronization information.

In the above manner, the first value is used as the synchronization symbol to carry the identifier of the PID synchronization information, so that the second device can read the PID synchronization information in the time base field when the time base number indicated by the time base ID field is the first value.

Exemplarily, taking the synchronization symbol including the fields described in Table 4 as an example, the first information may be as shown in Table 6.

Table 6

Exemplarily, the first PID synchronization information may be used to indicate the PID of the PLRB sent before the first information. For example, the first PID synchronization information may be used to indicate the PID of the previous PLRB of the first information. For another example, the first PID synchronization information may be used to indicate the PID of the penultimate PLRB sent before the first information, and so on.

Alternatively, the first PID synchronization information may also be used to indicate the PID of the PLRB sent after the first information. For example, the first PID synchronization information may be used to indicate the PID of the next PLRB of the first information. For another example, the first PID synchronization information may be used to indicate the PID of the second PLRB sent after the first information, and so on.

In an implementation manner, the transmission frequency of the synchronization symbol carrying the PID synchronization information may be preconfigured, or may be determined through negotiation during the process of establishing the link between the first device and the second device. Of course, it can also be determined in other ways, which is not specifically limited here.

In the above embodiment, by multiplexing the periodically sent synchronization symbols, the data receiving end can complete the counting synchronization of the PID while recovering the PHY code block delimitation and scrambling code synchronization, thereby avoiding erroneous retransmission after link recovery. .

In another possible implementation manner, the first information may also be a PLRB. The first synchronization information may be carried in the PLCB payload field of the PLRB.

In an exemplary illustration, the first PID synchronization information may be the PID of the first information.

As an example, the PLRB can carry the first synchronization information in the following form: the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, and the second field indicates non-data information. The type of data information is PID synchronization information, and the third field carries the first PID synchronization information.

The first field may be the indicator bit shown in FIG. 2 , and for details, please refer to the relevant description of the indicator bit, which will not be repeated here.

The second field may be the sub-indication bit shown in FIG. 2 , wherein, in this embodiment of the present application, the second field may indicate that the non-data information is PID synchronization information by a value, for example, 0x69 may be used to indicate that the non-data information is PID Synchronization information. Exemplarily, the content indicated by the second field may be as shown in Table 7.

Table 7

第二字段second field	非数据信息的类型Types of non-data information
0x1e0x1e	PHY PaddingPHY Padding

0x2d0x2d	PHY重传(ACK)PHY Retransmission (ACK)
0x3c0x3c	链路重建link re-establishment
0x4b0x4b	间歇训练interval training
0x5a0x5a	休眠hibernate
0x690x69	PID同步信息PID synchronization information
其他other	预留reserved

It should be understood that the indication content and the corresponding relationship between the values and the indication content shown in Table 7 above are only exemplary descriptions.

The third field may be the content field shown in FIG. 2 , and in this embodiment of the present application, the third field may carry PID synchronization information.

Optionally, the first information may further include a CRC field. The CRC field can ensure that the correctness of the PHY retransmission message can be confirmed through the CRC check in the case of an error in the transmission of the PLRB code block.

The format of the third field can also be understood as the format of the PID information when the PID synchronization information is carried, and is described below.

The third field may include at least one of the following subfields: a first subfield, a second subfield, a third subfield, and a fourth subfield.

The first subfield may be used to indicate whether the PLRB is a response message or a request message for the PID synchronization information. The first subfield in the first information may indicate that the first PID synchronization information is a response message.

The second subfield may be used to carry the PID of the corresponding PLRB, for example, the second subfield in the first information may carry the PID of the first information.

The third subfield may be used to indicate the transmission direction for PID synchronization.

The fourth subfield is used to indicate the transmission direction of the corresponding PLRB. For example, the fourth subfield in the first information may indicate the transmission direction of the first information.

For ease of understanding, the third field carrying the PID synchronization information is illustrated below as an example, as shown in Table 8.

Table 8

Among them, the PID synchronization of forward transmission can be understood as that the data sending end sends PID synchronization information for PID synchronization to the data receiving end, that is, sending a PID synchronization response message, and the data receiving end receives the PID synchronization information after receiving the PID synchronization information. PID count synchronization is performed.

The PID synchronization of reverse transmission can be understood as the data receiving end sends PID synchronization information for PID synchronization to the data transmitting end, that is, sending a PID synchronization response message, and the data transmitting end performs PID synchronization after receiving the PID synchronization information. Count sync.

It should be understood that Table 8 is only an exemplary description, and does not specifically limit the number of bits of each subfield in the third field, the corresponding relationship between the value and the indication content, and the like. In addition, the third field may also include other subfields, and the subfields included in the third field are not specifically limited here.

In some embodiments, the first device may actively send the first information to the second device. For example, the first device may periodically send the first information to the second device, or may send the first information to the second device when triggered by an event. Wherein, when the first device periodically sends the first information, the sending cycle of the first information may be pre-configured, or may be determined through negotiation during the process of establishing a link between the first device and the second device.

In other embodiments, the first device may be the first information sent at the request of the second device. For example, before the first device sends the first information, the second device sends the second information to the first device, the second information carries the second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.

Wherein, the second information may be PLRB. The format of the second information is similar to that of the first information, except that the third field of the first information carries the first PID synchronization information for PID synchronization and the PLRB information of the first information, for example, the PID of the first information , the transmission direction of the first information, etc., the third field of the second information carries the second PID synchronization information for requesting the first PID synchronization information and the PLRB information of the second information, for example, the PID of the second information, the first 2. The direction of information transmission, etc. Take the third field format shown in Table 8 as an example to illustrate the difference between the first information and the second information. The first subfield of the first information is 10, indicating a response message, and the first subfield of the second information is The value is 00, indicating a request message. The third subfield of the first information indicates the transmission direction of the first information, and the third subfield of the second information indicates the transmission direction of the second information. The fourth subfield of the first information indicates the PID of the first information, and the fourth subfield of the second information indicates the PID of the second information.

Where the second information is the same as the first information, reference may be made to the relevant description of the above-mentioned first information, and details are not repeated here.

In the above-mentioned embodiments, the PHY control message can be used to carry the PID synchronization information, so that the PID synchronization can be realized, thereby avoiding erroneous retransmission.

Embodiment 2:

The present application provides a data transmission method. As shown in Figure 5, the method includes:

S501. The first device generates at least two code blocks.

Wherein, at least two code blocks carry one PLCB respectively, and at least one first code block in the at least two code blocks carries control information of PLCB, the control information of PLCB includes identification information of PLCB and corresponding indication information, and the indication information indicates PLCB is the Nth transmission, and N is a positive integer.

S502, the first device sends at least two code blocks. Accordingly, the second device receives at least two code blocks.

S503, the second device stores the control information of the PLCB carried by the at least one first code block.

In this embodiment of the present application, the PHY code block is determined by the identifier of the PLCB and the number of times the PLCB is retransmitted, so that the second device can accurately indicate the PHY code block with an error in transmission, so that retransmission errors can be avoided. And, in this way, the two ends of the transceiver can no longer maintain the PID.

In a possible implementation manner, the first code block may be a PLRB. The control information of the PLCB may carry the PLCB control field of the PLRB.

In an implementation manner, the PLCB control field may include a PLCB ID field and a retransmission indication field, wherein the retransmission indication field may indicate that the PLCB is the Nth retransmission. It should be understood that the "PLCB ID field" and "retransmission indication field" are only an exemplary name, and may also be named as other fields, as long as the field has the "retransmission indication field" or "PLCB ID field" in the embodiment of the present application It can be considered as the "retransmission indication field" or "PLCB ID field" in this embodiment of the present application.

Exemplarily, the PLCB control field may be as shown in Table 9.

Table 9

It should be understood that Table 9 is only an exemplary description, and the filling indication field may be an optional field. In addition, the PLCB control field may also include other fields not shown in Table 9, and the subfields included in the PLCB control field are not included here. Make specific restrictions.

In a possible implementation manner, the second device may send a second code block to the first device, the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, Receiving status information, the identification information of the first PLCB is an ID of a PLCB that has been successfully received, the indication information of the first PLCB indicates that the first PLCB is the M-th transmission, M is a positive integer, and the receiving status information indicates that at least two code blocks are transmitted. receive status. The first device may determine, according to the retransmission information, a PLCB that fails to transmit among the PLCBs carried by the at least two code blocks.

Optionally, the identifier of the first PLCB may be the identifier of the last PLCB successfully received, or the identifier of the first PLCB may be the identifier of a PLCB successfully received within the feedback range.

In an exemplary illustration, the second code block may also be a PLRB. The retransmission information may be carried in the PLCB payload field of the PLRB.

An example, the PLRB can carry the retransmission information in the following form: the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, and the second field indicates non-data information. The type of information is transmission confirmation information, and the third field carries retransmission information.

The second field may be the sub-indication bit shown in FIG. 2 . For details, please refer to the relevant description of the sub-indication bit in the explanation of the PHY code block, or you may also refer to the relevant description of the sub-indication bit in Embodiment 1. It will not be repeated here.

The third field may be the content field shown in FIG. 2 , and in this embodiment of the present application, the third field may carry retransmission information.

The format of the third field when the retransmission information is carried, which can also be understood as the format of the retransmission information, will be described below.

The first subfield may be used to indicate the error feedback type, the error feedback type is complete error feedback or partial error feedback, the complete error feedback indicates that the receiving state indicates all second PLCBs that receive errors, and the partial error feedback indicates that the receiving state only indicates Part of the second PLCB that received an error was detected.

The second subfield may carry the identifier of the first PLCB.

The third subfield may carry the indication information of the first PLCB.

The fourth subfield may carry reception status information.

For ease of understanding, the third field carrying the retransmission information is exemplified below, as shown in Table 10.

Table 10

It should be understood that Table 10 is only an exemplary description, and does not specifically limit the number of bits of each subfield in the third field, the corresponding relationship between the value and the indicated content, and the like. In addition, the third field may also include other subfields, and the subfields included in the third field are not specifically limited here.

In order to facilitate the understanding of the solution described in the second embodiment, the following description is given with reference to specific examples.

As shown in Figure 6, the first device sends PHY code blocks 1 to 3 to the second device in sequence, wherein, PHY code block 1 carries PLCB 1 and indicates PLCB 1 as the initial transmission, and PHY code block 2 carries PLCB 2 and indicates PLCB 2 For initial transmission, PHY code block 3 carries PLCB 3 and indicates PLCB 3 as initial transmission.

After the second device receives the PHY code blocks 1 to 3 and finds that the PHY code block 2 has a transmission error, the second device can send ACK 1 to the first device, where the ACK 1 carries the identifier of PLCB 3 and indicates that PLCB 3 is the initial transmission, Receive status information (in order: PHY code block 2 is wrong, PHY code block 1 is correct).

After receiving the ACK 1, the first device can instruct PLCB to determine PHY code block 3 for the initial transmission according to the identification of PLCB1, and then use PHY code block 3 as the last PHY code block, and count 2 code blocks forward, that is, the code For blocks 1 to 3, according to the reception status information, it can be determined that the transmission of PHY code block 2 is wrong, and the transmission of PHY code block 1 is correct.

The first device retransmits the PLCB 2 carried by the PHY code block 2 through the PHY code block 5, and instructs the PLCB 2 for the first retransmission.

After receiving the PHY code blocks 4 to 5, the second device finds that the transmission of the PHY code block 4 is wrong, and the transmission of the PHY code block 5 is correct. The second device may send an ACK 2 to the first device, wherein the ACK 2 carries the identifier of the PLCB 2 and indicates that the PLCB 2 is the first retransmission, receiving status information (in order: PHY code block 4 is wrong, PHY code block 3 Correct, PHY code block 2 is wrong, PHY code block 1 is correct).

After receiving the ACK 2, the first device can instruct the PLCB 2 to determine the PHY code block 5 for the first retransmission according to the identification of the PLCB 2, and then take the PHY code block 5 as the last PHY code block, and count 4 ahead. The code blocks, that is, the PHY code blocks 1 to 5, can be determined according to the receiving state information as the receiving states of the PHY code blocks 1 to 5 in sequence: correct; incorrect; correct; incorrect; correct, so that the first device can determine that the PHY code block 4 is transmitted mistake.

The first device retransmits the PLCB 3 carried by the PHY code block 4.

It should be noted that the identifier of the first PLCB carried by the second subfield in the ACK may be the PLCB ID carried by the last PHY code block that is successfully received within the feedback range, or the first PHY code block that is successfully received within the feedback range. Carrying PLCB ID.

In an implementation manner, the identifier of the first PLCB can be indicated by means of an implicit indication that the identifier of the first PLCB is the PLCB ID carried by the last PHY code block successfully received within the feedback range, or the first successfully received PHY code block within the feedback range. For example, it can be specified through the protocol that the identifier of the first PLCB is the PLCB ID carried by the last successfully received PHY code block within the feedback range.

In another implementation manner, the identifier of the first PLCB can also be indicated by displaying an indication that the identifier of the first PLCB is the PLCB ID carried by the last successfully received PHY code block within the feedback range, or the first successfully received PHY code block within the feedback range The carried PLCB ID, for example, is indicated by a field not shown in the ACK. The reception status may use the successfully received PHY code block determined by the second subfield and the third subfield as an anchor point, indicating the reception status of other PHY code blocks. Specifically, it may be indicated by means of bit mapping, or other indication manners, which are not specifically limited in this embodiment of the present application.

Based on the same technical concept as the method embodiments, the embodiments of the present application provide a data transmission apparatus. The structure of the apparatus may be as shown in FIG. 7 , including a processing unit 701 and a transceiver unit 702 .

In an implementation manner, the data transmission apparatus can be specifically used to implement the method executed by the first device in the embodiment of FIG. The part of the function used to perform the related method. The processing unit 701 is configured to generate first information, where the first information includes first PID synchronization information, and the first PID synchronization information is used for PID synchronization; the transceiver unit 702 is configured to send the first information.

Exemplarily, PID synchronization includes PID count synchronization between the first device and the second device.

Exemplarily, the first information is a synchronization symbol, the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information.

Exemplarily, the synchronization symbol further includes a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the first value indicates that the time base field carries the first PID synchronization information.

Exemplarily, the first PID synchronization information is used to indicate the PID of the PLRB sent before the first information; or, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information.

Exemplarily, the first information is a PLRB, the PLRB includes a PLCB payload field, and the PLCB payload field carries the first PID synchronization information.

Exemplarily, the first PID synchronization information is the PID of the first information.

Exemplarily, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, the second field indicates that the type of the non-data information is PID synchronization information, and the third field Carry the first PID synchronization information.

Exemplarily, the third field includes a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message.

Optionally, the transceiver unit 702 is further configured to: before the processing unit 701 generates the first information, receive second information, where the second information carries the second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information .

Exemplarily, the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information.

Exemplarily, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second information carries non-data information, the second field indicates that the type of the non-data information is PID synchronization information, and the third field Carry the second PID synchronization information.

Exemplarily, the third field includes a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message.

Exemplarily, the third field further includes a second subfield and at least one of the following subfields: a third subfield and a fourth subfield; wherein the second subfield is used to carry the PID of the corresponding PLRB, and the third subfield is used to carry the PID of the corresponding PLRB. The field is used to indicate the transmission direction for PID synchronization; the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.

In another implementation manner, the data transmission apparatus may be specifically used to implement the method performed by the first device in the embodiment of FIG. 5 , and the apparatus may be the first device itself, or may be a chip or chipset or The part of the chip used to perform the function of the associated method. The processing unit 701 is configured to generate at least two code blocks, each of the at least two code blocks carries a PLCB, and at least one first code block of the at least two code blocks carries control information of the PLCB, and the control information of the PLCB includes Identification information of PLCB and corresponding indication information, the indication information indicates that PLCB is the Nth transmission, and N is a positive integer; the transceiver unit 702 is used for sending at least two code blocks.

Exemplarily, the first code block is a PLRB, the first code block includes a PLCB control field, and the PLCB control field carries control information of the PLCB.

Optionally, the transceiver unit 702 is further configured to: receive a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, The identification information of the first PLCB is the ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the M-th transmission, M is a positive integer, and the reception status information indicates the reception status of at least two code blocks; processing; The unit 701 is further configured to: determine, according to the retransmission information, a PLCB whose transmission fails among the PLCBs carried by the at least two code blocks.

Exemplarily, the second code block is a PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries retransmission information.

Exemplarily, the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, the second field indicates that the type of the non-data information is transmission confirmation information, and the third field field carries retransmission information.

Exemplarily, the third field also indicates the error feedback type, the error feedback type is complete error feedback or partial error feedback, the complete error feedback indicates that the receiving state indicates all second PLCBs that receive errors, and the partial error feedback indicates that the receiving state only indicates The second PLCB partially received the error.

In an implementation manner, the data transmission apparatus may be specifically used to implement the method executed by the second device in the embodiment of FIG. The part of the function used to perform the related method. The transceiver unit 702 is used for receiving first information, the first information includes first PID synchronization information, and the first PID synchronization information is used for PID synchronization; the processing unit 701 is used for performing PID synchronization according to the first PID synchronization information.

Optionally, the transceiver unit 702 is further configured to: before receiving the first information, send second information, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.

Exemplarily, the third field includes a second subfield and at least one of the following subfields: a third subfield and a fourth subfield; wherein the second subfield is used to carry the PID of the corresponding PLRB, and the third subfield is used to carry the PID of the corresponding PLRB. Used to indicate the transmission direction for PID synchronization; the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.

In another implementation manner, the data transmission apparatus may be specifically used to implement the method performed by the second device in the embodiment of FIG. 5 , and the apparatus may be the second device itself, or may be a chip or a chipset or a chip in the second device. The part of the chip used to perform the function of the associated method. The transceiver unit 702 is configured to receive at least two code blocks, the at least two code blocks carry one PLCB respectively, and at least one first code block in the at least two code blocks carries the control information of the PLCB, and the control information of the PLCB includes The identification information of the PLCB and the corresponding indication information, the indication information indicates that the PLCB is the Nth transmission, and N is a positive integer; the processing unit 701 is configured to determine the control information of at least one PLCB.

Optionally, the transceiver unit 702 is further configured to: send a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, The identification information of the first PLCB is the ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, M is a positive integer, and the reception status information indicates the reception status of at least two code blocks.

The division of modules in the embodiments of the present application is schematic, and is only a logical function division. In actual implementation, there may be other division methods. In addition, the functional modules in the various embodiments of the present application may be integrated into one processing unit. In the device, it can also exist physically alone, or two or more modules can be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It can be understood that, for the functions or implementations of each module in the embodiments of the present application, further reference may be made to the related descriptions of the method embodiments.

In a possible manner, the data transmission apparatus may be as shown in FIG. 8 , and the apparatus may be a chip in the first device or the second device. The apparatus may include a processor 801 , a communication interface 802 , and a memory 803 . The processing unit 701 may be the processor 801 . The transceiver unit 702 is the communication interface 802 .

The processor 801 may be a central processing unit (Central Processing Unit, CPU), or a digital processing unit or the like. The communication interface 802 may be a transceiver, an interface circuit such as a transceiver circuit, or a transceiver chip or the like. The apparatus further includes: a memory 803 for storing programs executed by the processor 801 . The memory 803 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may be a volatile memory (volatile memory), such as random access memory (random access memory) -access memory, RAM). Memory 803 is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The processor 801 is configured to execute the program code stored in the memory 803, and is specifically configured to execute the actions of the above-mentioned processing unit 701, which will not be described in detail in this application. The communication interface 802 is specifically configured to perform the actions of the above-mentioned transceiver unit 702, and details are not described herein again in this application.

The specific connection medium between the communication interface 802 , the processor 801 , and the memory 803 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 803, the processor 801, and the communication interface 802 are connected through a bus 804 in FIG. 8, and the bus is represented by a thick line in FIG. 8. The connection between other components is only for schematic illustration. , is not limited. The bus can be divided into address bus, data bus, control bus and so on. For ease of presentation, only one thick line is used in FIG. 8, but it does not mean that there is only one bus or one type of bus.

Embodiments of the present application further provide a communication system, including a communication device for implementing the function of a sending node in the embodiments of FIG. 4 to FIG. 5 and a communication device for implementing the function of a receiving node in the embodiments of FIG. 4 to FIG. 5 .

Embodiments of the present application further provide a computer-readable storage medium for storing computer software instructions that need to be executed to execute the above-mentioned processor, which includes a program to be executed to execute the above-mentioned processor.

An embodiment of the present application further provides a vehicle, the vehicle includes a first device and/or a second device, and the first device and the second device are used to implement the data transmission method in FIG. 4 or FIG. 5 individually or jointly. Exemplarily, the first device and the second device may be the communication apparatus shown in FIG. 7 .

The embodiment of the present application further provides a chip, the chip includes at least one processor and a communication interface, the processor is coupled to the memory, and is used for reading a computer program stored in the memory to execute the computer program in the embodiment shown in FIG. 4 or FIG. 5 . Function.

An embodiment of the present application further provides a chip, including a communication interface and at least one processor, where the processor operates to perform the functions in the embodiment described in FIG. 4 or FIG. 5 .

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the protection scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

A data transmission method, characterized in that the method comprises:

generating first information, the first information including the first physical layer Reed Solomon error correction coding block identification PID synchronization information, the first PID synchronization information is used for PID synchronization;

Send the first information.
The method of claim 1, wherein the PID synchronization comprises PID count synchronization between the first device and the second device.
The method of claim 2, wherein the first information is a synchronization symbol, the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information.
The method according to claim 3, wherein the synchronization symbol further comprises a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the The first value indicates that the time base field carries the first PID synchronization information.
The method according to claim 3 or 4, wherein the first PID synchronization information is used to indicate the PID of the physical layer Reed Solomon error correction coding block PLRB sent before the first information;

Alternatively, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information.
The method of claim 2, wherein the first information is a PLRB, the PLRB includes a physical layer content block PLCB payload field, and the PLCB payload field carries the first PID synchronization information.
The method of claim 6, wherein the first PID synchronization information is a PID of the first information.
The method according to claim 6 or 7, wherein the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the first PID synchronization information.
The method of claim 8, wherein the third field comprises a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message.
The method according to any one of claims 6-9, wherein before the generating the first information, the method further comprises:

Second information is received, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.
The method of claim 10, wherein the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information.
The method of claim 11, wherein the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second information carries non-data information, the The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the second PID synchronization information.
The method of claim 12, wherein the third field comprises a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message.
The method according to claim 8 or 9 or 12 or 13, wherein the third field further comprises a second subfield and at least one of the following subfields: a third subfield and a fourth subfield;

The second subfield is used to carry the PID of the corresponding PLRB, the third subfield is used to indicate the transmission direction for PID synchronization, and the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.
A data transmission method, characterized in that the method comprises:

Generate at least two code blocks, the at least two code blocks respectively carry a physical layer content block PLCB, and at least one first code block of the at least two code blocks carries the control information of the PLCB, the control information of the PLCB The information includes identification information of the PLCB and corresponding indication information, the indication information indicates that the PLCB is the Nth transmission, and the N is a positive integer;

The at least two code blocks are transmitted.
The method of claim 15, wherein the first code block is a physical layer Reed Solomon error correction coding block PLRB, the first code block includes a PLCB control field, and the PLCB control field carries the Control information of PLCB.
The method of claim 15 or 16, wherein the method further comprises:

Receives a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, and the information of the first PLCB The identification information is the identification ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, the M is a positive integer, and the reception status information indicates that the at least two The receiving status of the code block;

It is determined according to the retransmission information that a PLCB that fails to transmit among the PLCBs carried by the at least two code blocks is determined.
The method of claim 17, wherein the second code block is a PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries the retransmission information.
The method of claim 18, wherein the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, and the The second field indicates that the type of the non-data information is transmission confirmation information, and the third field carries the retransmission information.
The method of claim 19, wherein the third field further indicates an error feedback type, the error feedback type is complete error feedback or partial error feedback, and the complete error feedback indicates that the receiving status indicates that the For all second PLCBs receiving errors, the partial error feedback indicates that the receiving status indicates only a portion of the second PLCBs receiving errors.
A data transmission method, characterized in that the method comprises:

receiving first information, where the first information includes first physical layer Reed Solomon error correction coding block identification PID synchronization information, where the first PID synchronization information is used for PID synchronization;

PID synchronization is performed according to the first PID synchronization information.
21. The method of claim 21, wherein the PID synchronization comprises PID count synchronization between the first device and the second device.
The method of claim 22, wherein the first information is a synchronization symbol, and the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information.
The method of claim 23, wherein the synchronization symbol further comprises a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the The first value indicates that the time base field carries the first PID synchronization information.
The method according to claim 23 or 24, wherein the first PID synchronization information is used to indicate the PID of the physical layer Reed Solomon error correction coding block PLRB sent before the first information;

Alternatively, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information.
The method of claim 22, wherein the first information is a PLRB, the PLRB includes a physical layer content block PLCB payload field, and the PLCB payload field carries the first PID synchronization information.
The method of claim 26, wherein the first PID synchronization information is a PID of the first information.
The method according to claim 26 or 27, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the first information carries non-data information, The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the first PID synchronization information.
The method of claim 28, wherein the third field comprises a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message.
The method according to any one of claims 26-29, wherein before the receiving the first information, the method further comprises:

Send second information, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.
The method of claim 30, wherein the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information.
The method of claim 31, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the second information carries non-data information, the The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the second PID synchronization information.
The method of claim 32, wherein the third field comprises a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message.
The method according to claim 28 or 29 or 32 or 33, wherein the third field comprises a second subfield and at least one of the following subfields: a third subfield and a fourth subfield;

The second subfield is used to carry the PID of the corresponding PLRB, the third subfield is used to indicate the transmission direction for PID synchronization, and the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.
A data transmission method, characterized in that the method comprises:

Receive at least two code blocks, the at least two code blocks respectively carry a physical layer content block PLCB, and at least one first code block of the at least two code blocks carries the control information of the PLCB, the control information of the PLCB The information includes identification information of the PLCB and corresponding indication information, the indication information indicates that the PLCB is the Nth transmission, and the N is a positive integer;

Control information for at least one PLCB is determined.
The method of claim 35, wherein the first code block is a physical layer Reed Solomon error correction coding block PLRB, the first code block includes a PLCB control field, and the PLCB control field carries the Control information of PLCB.
The method of claim 35 or 36, wherein the method further comprises:

Send a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, and the information of the first PLCB The identification information is the identification ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, the M is a positive integer, and the reception status information indicates that the at least two The received status of the code block.
The method of claim 37, wherein the second code block is a PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries the retransmission information.
The method of claim 38, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, and the The second field indicates that the type of the non-data information is transmission confirmation information, and the third field carries the retransmission information.
The method of claim 39, wherein the third field further indicates an error feedback type, the error feedback type is complete error feedback or partial error feedback, and the complete error feedback indicates that the receiving status indicates that the For all second PLCBs receiving errors, the partial error feedback indicates that the receiving status indicates only a portion of the second PLCBs receiving errors.
A data transmission device, characterized in that the device comprises:

a processing unit, configured to generate first information, where the first information includes first physical layer Reed Solomon error correction coding block identification PID synchronization information, and the first PID synchronization information is used for PID synchronization;

A transceiver unit, configured to send the first information.
41. The apparatus of claim 41, wherein the PID synchronization comprises PID count synchronization between the first device and the second device.
The apparatus of claim 42, wherein the first information is a synchronization symbol, the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information.
The apparatus according to claim 43, wherein the synchronization symbol further comprises a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the The first value indicates that the time base field carries the first PID synchronization information.
The apparatus according to claim 43 or 44, wherein the first PID synchronization information is used to indicate the PID of the physical layer Reed Solomon error correction coding block PLRB sent before the first information;

Alternatively, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information.
The apparatus of claim 42, wherein the first information is a PLRB, the PLRB includes a physical layer content block PLCB payload field, and the PLCB payload field carries the first PID synchronization information.
The apparatus of claim 46, wherein the first PID synchronization information is a PID of the first information.
The apparatus according to claim 46 or 47, wherein the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the first information carries non-data information, The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the first PID synchronization information.
The apparatus of claim 48, wherein the third field comprises a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message.
The device according to any one of claims 46-49, wherein the transceiver unit is further configured to:

Before the processing unit generates the first information, the processing unit receives second information, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.
The apparatus of claim 50, wherein the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information.
The apparatus of claim 51, wherein the PLCB payload field includes a first field, a second field and a third field, the first field indicates that the second information carries non-data information, the The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the second PID synchronization information.
The apparatus of claim 52, wherein the third field comprises a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message.
The apparatus according to claim 48 or 49 or 52 or 53, wherein the third field further comprises a second subfield and at least one of the following subfields: a third subfield and a fourth subfield;

The second subfield is used to carry the PID of the corresponding PLRB, the third subfield is used to indicate the transmission direction for PID synchronization, and the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.
A data transmission device, characterized in that the device comprises:

a processing unit, configured to generate at least two code blocks, wherein the at least two code blocks respectively carry a physical layer content block PLCB, and at least one first code block of the at least two code blocks carries control information of the PLCB, The control information of the PLCB includes the identification information of the PLCB and corresponding indication information, the indication information indicates that the PLCB is the Nth transmission, and the N is a positive integer;

A transceiver unit, configured to transmit the at least two code blocks.
The apparatus of claim 55, wherein the first code block is a physical layer Reed Solomon error correction coding block PLRB, the first code block includes a PLCB control field, and the PLCB control field carries the Control information of PLCB.
The device according to claim 55 or 56, wherein the transceiver unit is further configured to:

Receives a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, and the information of the first PLCB The identification information is the identification ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, the M is a positive integer, and the reception status information indicates that the at least two The receiving status of the code block;

The processing unit is further configured to: determine, according to the retransmission information, a PLCB whose transmission fails among the PLCBs carried by the at least two code blocks.
The apparatus of claim 57, wherein the second code block is a PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries the retransmission information.
The apparatus of claim 58, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, and the The second field indicates that the type of the non-data information is transmission confirmation information, and the third field carries the retransmission information.
The apparatus according to claim 59, wherein the third field further indicates an error feedback type, the error feedback type is complete error feedback or partial error feedback, and the complete error feedback indicates that the receiving state indicates that the For all second PLCBs receiving errors, the partial error feedback indicates that the receiving status indicates only a portion of the second PLCBs receiving errors.
A data transmission device, characterized in that the device comprises:

a transceiver unit, configured to receive first information, where the first information includes first physical layer Reed Solomon error correction coding block identification PID synchronization information, where the first PID synchronization information is used for PID synchronization;

The processing unit is configured to perform PID synchronization according to the first PID synchronization information.
61. The apparatus of claim 61, wherein the PID synchronization comprises PID count synchronization between the first device and the second device.
The apparatus of claim 62, wherein the first information is a synchronization symbol, the synchronization symbol includes a time base field, and the time base field carries the first PID synchronization information.
The apparatus of claim 63, wherein the synchronization symbol further comprises a time base identification field for indicating a time base number, wherein the time base number indicated by the time base identification field is a first value, and the The first value indicates that the time base field carries the first PID synchronization information.
The apparatus according to claim 63 or 64, wherein the first PID synchronization information is used to indicate the PID of the physical layer Reed Solomon error correction coding block PLRB sent before the first information;

Or, the first PID synchronization information is used to indicate the PID of the PLRB sent after the first information.
The apparatus of claim 62, wherein the first information is a PLRB, the PLRB includes a physical layer content block PLCB payload field, and the PLCB payload field carries the first PID synchronization information.
The apparatus of claim 66, wherein the first PID synchronization information is a PID of the first information.
The apparatus according to claim 66 or 67, wherein the PLCB payload field includes a first field, a second field and a third field, and the first field indicates that the first information carries non-data information, The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the first PID synchronization information.
The apparatus of claim 68, wherein the third field comprises a first subfield, and the first subfield indicates that the first PID synchronization information is a PID synchronization response message.
The device according to any one of claims 66-69, wherein the transceiver unit is further configured to:

Before the receiving of the first information, second information is sent, where the second information carries second PID synchronization information, and the second PID synchronization information is used to request the first PID synchronization information.
The apparatus of claim 70, wherein the second information is a PLRB, and the PLRB includes a PLCB payload field; the PLCB payload field carries the second PID synchronization information.
The apparatus of claim 71, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the second information carries non-data information, the The second field indicates that the type of the non-data information is PID synchronization information, and the third field carries the second PID synchronization information.
The apparatus of claim 72, wherein the third field comprises a first subfield, and the first subfield indicates that the second PID synchronization information is a PID synchronization request message.
The apparatus according to claim 68 or 69 or 72 or 73, wherein the third field comprises a second subfield and at least one of the following subfields: a third subfield and a fourth subfield;

The second subfield is used to carry the PID of the corresponding PLRB, the third subfield is used to indicate the transmission direction for PID synchronization, and the fourth subfield is used to indicate the transmission direction of the corresponding PLRB.
A data transmission device, characterized in that the device comprises:

a transceiver unit, configured to receive at least two code blocks, wherein the at least two code blocks respectively carry a physical layer content block PLCB, and at least one first code block of the at least two code blocks carries control information of the PLCB, The control information of the PLCB includes the identification information of the PLCB and corresponding indication information, the indication information indicates that the PLCB is the Nth transmission, and the N is a positive integer;

The processing unit is configured to determine the control information of at least one PLCB.
The apparatus of claim 75, wherein the first code block is a physical layer Reed Solomon error correction coding block PLRB, the first code block includes a PLCB control field, and the PLCB control field carries the Control information of PLCB.
The device according to claim 75 or 76, wherein the transceiver unit is further configured to:

Send a second code block, where the second code block carries retransmission information, and the retransmission information includes: identification information of the first PLCB, indication information of the first PLCB, and reception status information, and the information of the first PLCB The identification information is the identification ID of a successfully received PLCB, the indication information of the first PLCB indicates that the first PLCB is the Mth transmission, the M is a positive integer, and the reception status information indicates that the at least two The received status of the code block.
The apparatus of claim 77, wherein the second code block is a PLRB, the second code block includes a PLCB payload field, and the PLCB payload field carries the retransmission information.
The apparatus of claim 78, wherein the PLCB payload field comprises a first field, a second field and a third field, the first field indicates that the second code block carries non-data information, and the The second field indicates that the type of the non-data information is transmission confirmation information, and the third field carries the retransmission information.
The apparatus of claim 79, wherein the third field further indicates an error feedback type, the error feedback type is a complete error feedback or a partial error feedback, and the complete error feedback indicates that the receiving status indicates that the For all second PLCBs receiving errors, the partial error feedback indicates that the receiving status indicates only a portion of the second PLCBs receiving errors.
A communication device, characterized in that the device includes a processor and a communication interface, the communication interface is used to receive computer program code or instructions and transmit them to the processor; the processor runs the computer program code or instructions to cause the apparatus to implement the method of any of claims 1-14 or the method of any of claims 15-20.
A communication device, characterized in that the device includes a processor and a communication interface, the communication interface is used to receive computer program code or instructions and transmit them to the processor; the processor runs the computer program code or instructions to cause the apparatus to implement a method as claimed in any one of claims 21-34 or a method as claimed in any one of claims 35-40.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program or an instruction, and the program or the instruction realizes claims 1- when read and executed by one or more processors 14 The method of any one of claims 15-20, or the program or the instructions, when read and executed by one or more processors, implement the method of any one of claims 15-20, or the program or the instructions, when read and executed by one or more processors, implement the method of any one of claims 21-34, or the program or the instructions when read by one or more processors And when executed, the method described in any one of claims 35-40 is realized.
A vehicle, characterized in that the vehicle includes a first device and/or a second device, the first device is used to execute the method according to any one of claims 1-14, and the second device is used for for carrying out the method of any one of claims 21-34.
A vehicle, characterized in that the vehicle includes a first device and/or a second device, the first device is used to execute the method according to any one of claims 15-20, and the second device is used for for carrying out the method of any one of claims 35-40.
A data transmission system, characterized in that the system comprises the device according to any one of claims 41-54 and the device according to any one of claims 61-74.
A data transmission system, characterized in that the system comprises the device according to any one of claims 55-60 and the device according to any one of claims 75-80.