Transmission method and system in Ethernet transmission line connection abnormal state

Abstract

The invention provides a transmission method and system in an Ethernet transmission line connection abnormal state, and belongs to the technical field of Ethernet transmission, and the method comprises the steps: carrying out the real-time detection of the states of a plurality of line pairs between a home terminal physical layer and an opposite terminal physical layer, and obtaining a line pair state monitoring result, which comprises line pair state information and line pair out-of-order mapping information; performing line pair mapping configuration according to the line pair state monitoring result so as to execute an automatic negotiation process on the line pair after the line pair mapping configuration; and carrying out data path cross switching on the plurality of line pairs according to the line pair out-of-order mapping information, carrying out rate clock adaptation and parallel-serial conversion or serial-parallel conversion on the line pairs after cross switching, and then realizing data transmission on the line pairs. The method has the beneficial effects that stable link establishment transmission is still realized when a single pair or two pairs of twisted pairs are abnormal, the method is compatible with a broken line or all line pair disorder scene under a normal condition, the stability, the reliability and the adaptability of a system are enhanced, and a solid guarantee is provided for high-speed and large-bandwidth data transmission.

Description

Technical Field

[0001] This invention relates to the field of Ethernet transmission technology, and in particular to a transmission method and system for Ethernet transmission line connection abnormalities. Background Technology

[0002] In the field of modern network communication, the demand for high-speed, high-bandwidth data transmission is growing. Taking Ethernet as an example, in network environments with speed specifications of 1000BASE-T and above and in accordance with the IEEE 802.3 series standards, in order to meet the above requirements, a full-duplex working mode with four pairs of twisted-pair cables for parallel transmission is adopted, thus forming a multi-channel parallel collaborative transmission architecture.

[0003] like Figure 1 As shown, the physical layer (PHY) transmission architecture mainly consists of a transmit path (TxPath) and a receive path (RxPath). In the transmission link of the local physical layer 10, the TX end of the Physical Coding Sublayer (PCS) is located between the Medium Access Control (MAC) sublayer of the data link layer and the transmission processing module of the Physical Medium Attachment (PMA) sublayer of the physical layer, realizing functions such as data encoding, DC balancing, and control signal differentiation; the TX end of the PMA layer is located between the PCS layer and the Digital-to-Analog Converter (DAC) or Analog-to-Digital Converter (ADC) 103, completing the conversion of parallel signals to serial signals and performing pre-emphasis processing on the signals; the DAC converts digital signals into analog components and transmits them through wire pairs; the RJ45 transmission interface 104 serves as the physical interface end of the local physical layer 10 and is connected to the remote physical layer 20 through a twisted pair cable. The transmission medium 30 uses Cat5e, Cat6, or Cat6a twisted-pair cable with interlocking and fixed. The four pairs of twisted-pair cables work in parallel (Gigabit Ethernet and above). Each pair undertakes unidirectional or bidirectional data transmission (full-duplex mode). The twisted structure can effectively reduce crosstalk, and the shielded twisted-pair cable can further reduce external electromagnetic interference.

[0004] In the receiving link of the peer physical layer 20, the RJ45 receiving interface 201 serves as the physical interface of the peer physical layer 20, used to capture the transmitted analog differential signal; the ADC in the digital-to-analog converter (DAC) or analog-to-digital converter (ADC) 202 converts the analog signal into a digital signal; the RX end of the physical medium connection sublayer 203 (PMA) integrates a hybrid equalization architecture of a feed-forward equalizer (FFE) and a decision feedback equalizer (DFE), and optimizes the equalization of the received signal through an adaptive training algorithm; the decoding module of the physical coding sublayer 204 (PCS) performs decoding operations corresponding to the encoding of the transmitting PCS layer, and performs cyclic redundancy check (CRC) to detect transmission errors.

[0005] However, when one or more pairs of wires malfunction, such as broken wires, poor contact, short circuits due to insulation damage, or transmission characteristic degradation caused by aging of twisted-pair cables, or sudden changes in contact resistance due to oxidation or loosening of RJ45 interface pins, the foundation of multi-channel parallel collaborative transmission will be directly destroyed. On the one hand, abnormal wire pairs cause data transmission interruption or a large number of bit errors in that channel, making it impossible to establish a connection and transmit signals normally. On the other hand, the synchronization mechanism between wire pairs is broken, and the signals of normal wire pairs and abnormal wire pairs deviate in timing and phase. This prevents the Physical Medium Attachment Equalizer (PMA-Equalizer) at the receiving end from achieving collaborative equalization compensation of multi-channel signals through adaptive training algorithms, leading to a sharp deterioration in crosstalk and inter-symbol interference (ISI). Summary of the Invention

[0006] To address the above technical problems, this invention provides a transmission method for Ethernet transmission line connection abnormalities; furthermore, it also provides a transmission system for Ethernet transmission line connection abnormalities.

[0007] The technical problem solved by this invention can be achieved by the following technical solutions: A transmission method for Ethernet transmission line connection abnormalities includes: Step S1: Real-time detection of the status of multiple wire pairs between the local physical layer and the remote physical layer is performed to obtain wire pair status monitoring results. The wire pair status monitoring results include wire pair status information and wire pair out-of-order mapping information. Step S2: Configure the line pair mapping based on the line pair status monitoring results, and execute the automatic negotiation process on the line pairs after the line pair mapping configuration; Step S3: According to the out-of-order mapping information of the line pairs, the data path of the multiple line pairs is cross-switched, and the line pairs after cross-switching are adapted for rate clock and converted from parallel to serial or from serial to parallel, and then data transmission is realized on the line pairs.

[0008] Preferably, step S1 includes: Step S11: Simultaneously and continuously send wire pair status identification information to all wire pairs between the local physical layer and the remote physical layer at preset time intervals; Step S12: If the peer device is detected to be of the first type, the status identification information of each wire pair received is parsed to determine the status monitoring result of the wire pair.

[0009] Preferably, in step S12, all the line pairs receive the line pair status identification information using a time-division multiplexing method; If a conflict is detected on any line pair during time-division listening, a backoff is performed based on the random value in the linear feedback shift register, and the line pair status identification information is resent to the line pair with the conflict after the backoff time ends.

[0010] Preferably, the preset time interval is a random time interval.

[0011] Preferably, in step S1, if the peer device is detected to be of the second type, the process is switched to execute the automatic negotiation process to directly establish the link.

[0012] Preferably, each line pair has a unique line pair number, and in step S2, the line pair mapping configuration includes: According to a preset first mapping rule, line pairs without disorder are configured for line pair mapping. The first mapping rule is a one-to-one mapping between line pair sequence numbers; and According to the preset second mapping rule, line pairs with disordered order are configured for line pair mapping. The second mapping rule is a cross-correspondence mapping of line pair sequence numbers.

[0013] Preferably, in step S2, the automatic negotiation process performed on the online pair after the online pair mapping configuration includes: When there are at least two normal wire pairs in the wire pair status monitoring results, after completing the wire pair mapping configuration, any two of the normal wire pairs can be selected to perform the automatic negotiation process.

[0014] Preferably, each of the wire pairs has a unique wire pair number, and the process of selecting two normal wire pairs to perform an auto-negotiation includes: Select the two normal line pairs with the smallest line pair numbers and perform an automatic negotiation process.

[0015] Preferably, step S3 includes: When all wire pairs are normal and there are no disordered wire pairs in the wire pair status monitoring results, data is transmitted through all wire pairs. When there are abnormal wire pairs in the wire pair status monitoring results, but there are at least two normal wire pairs and at least two normal wire pairs do not have wire pair disorder, two of the normal wire pairs can be randomly selected for rate clock adaptation, parallel-to-serial conversion or serial-to-parallel conversion to realize data transmission. When there are at least two normal wire pairs and wire pairs are out of order in the wire pair status monitoring results, the data path cross-switching of all wire pairs is performed according to the wire pair out of order mapping information. Two normal wire pairs are randomly selected for rate clock adaptation, parallel-to-serial conversion or serial-to-parallel conversion to realize data transmission.

[0016] On the other hand, a transmission system is provided for an Ethernet transmission line connection failure state, for implementing the transmission method described above under the Ethernet transmission line connection failure state, including: The wire pair status monitoring unit is used to detect the status of multiple wire pairs between the local physical layer and the remote physical layer in real time, and obtain the wire pair status monitoring results, which include wire pair status information and wire pair out-of-order mapping information. A line pair mapping unit is connected between the analog front end and the physical medium connection sublayer, and is also connected to the line pair status monitoring unit. It is used to configure the line pair mapping according to the line pair status monitoring results, so as to execute an automatic negotiation process on the line pairs after the line pair mapping configuration. The line pair switching unit is connected between the physical medium connection sublayer and the physical coding sublayer, and is connected to the line pair status monitoring unit. It is used to perform data path cross-switching on the multiple line pairs according to the line pair out-of-order mapping information, and to perform rate clock adaptation and parallel-to-serial conversion or serial-to-parallel conversion on the line pairs after cross-switching, so as to realize data transmission on the line pairs.

[0017] The advantages or beneficial effects of the technical solution of this invention are as follows: This invention monitors the status of multiple wire pairs between the local and remote physical layers in real time. Based on the monitoring results, it configures wire pair mapping in the digital domain, comprehensively adapting to various complex operating conditions where wire pair anomalies and out-of-order pairings coexist, ensuring the stable execution of the Ethernet auto-negotiation process. Simultaneously, based on the monitoring results, it dynamically performs data path cross-switching, rate clock adaptation, and parallel-to-serial or serial-to-parallel conversion in the digital domain, achieving abnormal wire pair avoidance and out-of-order correction. This ensures that data can still be transmitted correctly even when Ethernet wire pair anomalies and out-of-order pairings coexist, without interfering with the auto-negotiation process. No additional adapter interfaces or wire pairs are required, reducing system cost and complexity. It achieves stable link establishment and transmission even when a single or two twisted-pair wires are abnormal, and is compatible with all wire pair out-of-order scenarios under normal conditions or with broken wires, enhancing system stability, reliability, and adaptability, providing a solid guarantee for high-speed, high-bandwidth data transmission. Attached Figure Description

[0018] Figure 1 This is a diagram of the physical layer transmission architecture in existing technologies; Figure 2 This is a flowchart illustrating a transmission method under abnormal Ethernet transmission line connection conditions, as described in a preferred embodiment of the present invention. Figure 3 This is a schematic diagram of the line pair status monitoring process in a preferred embodiment of the present invention; Figure 4 This is a structural block diagram of a transmission system in a faulty Ethernet transmission line connection state, as described in a preferred embodiment of the present invention. Figure 5 This is a schematic diagram of out-of-order mapping of Ethernet transmission line connections in a preferred embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0022] In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a transmission method for Ethernet transmission line connection abnormalities is provided, such as... Figure 2 As shown, it includes: Step S1: Real-time detection of the status of multiple wire pairs between the local physical layer and the remote physical layer is performed to obtain the wire pair status monitoring results, which include wire pair status information and wire pair out-of-order mapping information. Step S2: Configure the pair mapping based on the pair status monitoring results, and then execute the automatic negotiation process on the pairs after the pair mapping is configured. Step S3: Based on the out-of-order mapping information of the wire pairs, perform cross-switching of data paths for multiple wire pairs, and perform rate clock adaptation and parallel-to-serial conversion or serial-to-parallel conversion on the wire pairs after cross-switching, and then realize data transmission on the wire pairs.

[0023] Specifically, for existing high-speed Ethernet (such as gigabit and above) networks like 10GBASE-T, four pairs of twisted-pair cables are required for parallel data transmission. If one or more pairs malfunction, or if one or more pairs malfunction and the pairs are out of order, the link will fail to establish a connection, data transmission will be interrupted, and normal data transmission will be impossible. Traditional Ethernet can generally only handle a few specific scenarios of out-of-order pairs. Even if it can handle various out-of-order scenarios, additional conversion interfaces are needed, and it cannot adapt to scenarios with broken and out-of-order pairs, thus limiting its adaptability.

[0024] In this embodiment, the status of multiple wire pairs between the local and remote physical layers is monitored in real time. Based on the wire pair status monitoring results, wire pair mapping is configured in the digital domain to fully adapt to various complex operating conditions where wire pair anomalies and out-of-order pairings coexist, ensuring the stable execution of the Ethernet auto-negotiation process. Simultaneously, based on the wire pair status monitoring results, data path cross-switching, rate clock adaptation, and parallel-to-serial or serial-to-parallel conversion are dynamically performed in the digital domain to avoid abnormal wire pairs and correct out-of-order pairings, ensuring that data can still be transmitted correctly even when Ethernet wire pair anomalies and out-of-order pairings coexist, without interfering with the auto-negotiation process.

[0025] Even when a single or double pair of twisted wires malfunctions, stable link establishment and transmission are maintained. The system is compatible with all wire pair out-of-order scenarios under normal conditions, including wire breakage and out-of-order transmission. This enhances the stability, reliability, and adaptability of the system, providing a solid guarantee for high-speed, high-bandwidth data transmission.

[0026] Furthermore, the line pair status monitoring results include the line pair status of each line pair among all line pairs. The line pair status mainly includes the following types: line pair in normal state, line pair in abnormal state, line pair out of order, and line pair not out of order.

[0027] In this embodiment, the wire pair status information includes whether all wire pairs of the twisted pair serving as the transmission medium between the local and remote physical layers are in an abnormal condition. A normal wire pair refers to a wire pair in a normal state; an abnormal wire pair refers to a wire pair in an abnormal state. Abnormal states include, but are not limited to, wire pair breakage, poor contact, short circuits caused by insulation damage, transmission characteristic degradation due to aging of the twisted pair cable, or sudden changes in contact resistance caused by oxidation or loosening of RJ45 interface pins.

[0028] To facilitate accurate identification and management of each wire pair, each wire pair has a unique wire pair number. This embodiment uses a four-pair twisted pair as the transmission medium, specifically including local pair 0, local pair 1, local pair 2, local pair 3, and opposite pair 0, opposite pair 1, opposite pair 2, and opposite pair 3. Under normal circumstances, the local and opposite pairs maintain a one-to-one connection relationship; that is, local pair 0 is connected to opposite pair 0, forming channel ch0; local pair 1 is connected to opposite pair 1, forming channel ch1; local pair 2 is connected to opposite pair 2, forming channel ch2; and local pair 3 is connected to opposite pair 3, forming channel ch3.

[0029] However, when wire pairs are not arranged in this standard order, for example, if local wire pair 0 is connected to peer wire pair 1, local wire pair 1 is connected to peer wire pair 3, local wire pair 2 is connected to peer wire pair 2, and local wire pair 3 is connected to peer wire pair 0, some or all wire pairs will be out of order. In this embodiment, the wire pair out-of-order mapping information includes the actual wire pair connection correspondence between the local wire pair number and the peer wire pair number, so as to facilitate subsequent out-of-order correction through the digital field and ensure the stable execution of the Ethernet auto-negotiation process and data transmission.

[0030] Furthermore, such as Figure 3 As shown, step S1 includes: Step S11: Simultaneously and continuously send wire pair status identification information to all wire pairs between the local physical layer and the remote physical layer at preset time intervals; The preset time interval is a random time interval; Step S12: If the peer device is detected to be of the first type, the status identification information of each wire pair is parsed to determine the status monitoring result of the wire pair.

[0031] In this embodiment, the first type of device is a device that supports the negotiation function of this invention. The negotiation function of this invention refers to the ability to automatically negotiate according to the mapped and configured wire pairs when a single or two pairs of twisted pairs are abnormal or the wire pairs are out of order.

[0032] Furthermore, in step S12, all wire pairs receive wire pair status identification information using a time-division multiplexing method; If a collision is detected on any line pair during time-division listening, a backoff is performed based on the random value in the linear feedback shift register, and the line pair status identification information is resent to the line pair with the collision after the backoff time ends.

[0033] Furthermore, in step S1, if the peer device is detected to be of the second type, the process switches to automatic negotiation to directly establish a link.

[0034] In this embodiment, the second type of device is a traditional Ethernet device.

[0035] Specifically, compared to existing technologies that use adapter interfaces to handle out-of-order wire pairs, this embodiment, through wire pair status detection and out-of-order identification, provides accurate and reliable decision-making basis for subsequent wire pair mapping and data exchange. Simultaneously, based on a specific linear feedback shift value, random backoff of conflicts is performed to resolve information exchange conflicts. Furthermore, various scenarios involving both Ethernet wire pair breaks and out-of-order pairings can be resolved without additional adapter interfaces, reducing costs and maintenance complexity.

[0036] The wire pair status monitoring includes two main sub-functions: wire pair status monitoring function and wire pair out-of-order monitoring function.

[0037] The working mechanism of the wire pair status monitoring function is as follows: Wire pair status identification information is continuously transmitted simultaneously on the four twisted pairs at random time intervals. Simultaneously, through time-division multiplexing and random backoff after a conflict, wire pair status negotiation is completed with the peer device. The negotiation logic is as follows: If the peer device is detected to support the negotiation function of this invention, the status of the wire pairs is determined synchronously to determine whether the status of the four wire pairs is normal or abnormal. When all 4 wire pairs are normal, switch to wire pair 0 and wire pair 1 for the traditional automatic negotiation process; During time-division listening, when a collision occurs on a line pair, the system backs down based on the random value in the linear feedback shift register and then retransmits the line pair status identification information. When a wire pair is damaged, but the number of normal wire pairs is ≥2, the two normal wire pairs are automatically selected and the traditional automatic negotiation process is started. If the peer device is detected to be a traditional Ethernet device, the system will directly switch to the traditional auto-negotiation process to establish a link, ensuring compatibility.

[0038] Specifically, the out-of-order pair detection function is implemented internally within the chip, requiring no interface conversion. Its working mechanism is as follows: Pair identification information is continuously transmitted simultaneously and at random time intervals over all four twisted pairs. Simultaneously, pair status negotiation is completed with the peer device through time-division multiplexing and random backoff after a collision. The negotiation logic is as follows: If the peer device is detected to support the negotiation function of this invention, the line pair identification information is parsed synchronously. During time-division listening, when a collision occurs on a line pair, the system backs down based on the random value in the linear feedback shift register and then retransmits the line pair status identification information. When all 4 wire pairs are normal, switch to wire pair 0 and wire pair 1 for the traditional automatic negotiation process; When the four line pairs are out of order, the two line pairs with the smallest line number are selected according to the line pair identification information and the traditional automatic negotiation process is performed. If the peer device is detected to be a traditional Ethernet device, the system will directly switch to the traditional auto-negotiation process to establish a link, ensuring compatibility.

[0039] Furthermore, each line pair has a unique line pair number. In step S2, the line pair mapping configuration includes: According to the preset first mapping rule, line pairs without disorder are configured for line pair mapping. The first mapping rule is a one-to-one mapping between line pair sequence numbers; and According to the preset second mapping rule, line pairs with disordered order are configured for line pair mapping. The second mapping rule is that the line pair sequence numbers are mapped crosswise.

[0040] Furthermore, in step S2, the automatic negotiation process performed on the online pair after the mapping configuration includes: When there are at least two normal wire pairs in the wire pair status monitoring results, after completing the wire pair mapping configuration, any two normal wire pairs can be selected to perform the automatic negotiation process.

[0041] Furthermore, each wire pair has a unique wire pair number, and the automatic negotiation process for any two normal wire pairs includes: Select the two normal line pairs with the smallest line pair numbers and perform an automatic negotiation process.

[0042] Specifically, the wire pair mapping configuration is processed entirely in the digital domain, which is simpler, more adaptable, and requires no additional modifications to analog data paths such as the ADC. Moreover, in addition to being compatible with traditional Ethernet scenarios, this invention can fully adapt to various complex working conditions where wire pair breaks and out-of-order connections coexist, ensuring the stable execution of the Ethernet auto-negotiation process and data transmission.

[0043] The core function of wire pair mapping is to perform precise configuration of wire pair mapping in the digital domain based on the wire pair status information and wire pair out-of-order mapping information in the wire pair status monitoring results, without the need for additional conversion interfaces or changes to analog data paths such as ADCs, thus ensuring the normal execution of the Ethernet auto-negotiation process.

[0044] For example, the specific scenario is as follows: Scenario 1: All 4 pairs of lines are normal and there is no disorder. Mapping rules: Establish a mapping relationship between local line pair 0 and remote line pair 0, establish a mapping relationship between local line pair 1 and remote line pair 1, establish a mapping relationship between local line pair 2 and remote line pair 2, and establish a mapping relationship between local line pair 3 and remote line pair 3.

[0045] Automatic negotiation channel: Traditional automatic negotiation is performed on local wire pair 0 and local wire pair 1 to complete the establishment of Ethernet link and parameter negotiation.

[0046] Scenario 2: Pair 1 on the other end is damaged, while the other three pairs are normal and not out of order. Mapping rules: Establish a mapping relationship between local line pair 0 and remote line pair 0, establish a mapping relationship between local line pair 2 and remote line pair 2, and establish a mapping relationship between local line pair 3 and remote line pair 3.

[0047] Automatic negotiation channel: The traditional automatic negotiation process is performed on local wire pair 0 and local wire pair 2 to ensure that an Ethernet link can still be established normally even if a single twisted pair is faulty.

[0048] Scenario 3: Pair 1 and pair 2 of the peer wire are damaged, while the other two pairs are normal and not out of order. Mapping rules: A mapping relationship is established between local line pair 0 and remote line pair 0; a mapping relationship is established between local line pair 3 and remote line pair 3. Automatic negotiation channel: The traditional automatic negotiation process is performed on local wire pair 0 and local wire pair 3 to ensure that an Ethernet link can still be established normally in the event of an abnormality in the twisted pair cable.

[0049] Scenario 4: The peer wire pair 1 and peer wire pair 2 are damaged and out of order, i.e. peer wire pair 0 is connected to this wire pair 1, and peer wire pair 3 is connected to this wire pair 0. Mapping rules: A mapping relationship is established between local line pair 0 and opposite line pair 1, and a mapping relationship is established between local line pair 3 and opposite line pair 0.

[0050] Automatic negotiation channel: The traditional automatic negotiation process is performed on peer line pair 0 and peer line pair 3 and local line pair 0 and local line pair 1 to ensure that the Ethernet automatic negotiation process can still be executed normally under complex working conditions where there are both disconnections and out-of-order connections.

[0051] Furthermore, step S3 includes: When all wire pairs are normal and there are no disordered wire pairs in the wire pair status monitoring results, data is transmitted through all wire pairs. When there are abnormal wire pairs in the wire pair status monitoring results, but there are at least two normal wire pairs and at least two normal wire pairs do not have wire pairs out of order, select any two normal wire pairs to perform rate clock adaptation, parallel-to-serial conversion or serial-to-parallel conversion to realize data transmission. When there are at least two normal wire pairs and wire pairs are out of order in the wire pair status monitoring results, the data path of all wire pairs is switched according to the wire pair out-of-order mapping information. Two normal wire pairs are randomly selected for rate clock adaptation, parallel-to-serial conversion or serial-to-parallel conversion to realize data transmission.

[0052] Specifically, in this embodiment, under the premise that the analog data path such as ADC remains unchanged, only through digital domain processing, based on the wire pair status information (normal / abnormal) and out-of-order mapping information (wire pair connection correspondence) output by the wire pair status monitoring unit, the cross-switching of the data path, rate clock adaptation and parallel-to-serial / serial-to-parallel conversion are dynamically performed to achieve abnormal wire pair avoidance and out-of-order correction, ensuring that in Ethernet scenarios such as 10GBASE-T, regardless of whether the wire pair is damaged or whether there is out-of-order connection, the data can still be transmitted correctly and will not interfere with the normal execution of the Ethernet auto-negotiation process.

[0053] Taking 10GBASE-T as an example, the typical working logic is as follows: Scenario 1: All 4 pairs of lines are normal and there is no disorder. PMA RX→PCS process: Line pairs 0-3 synchronously receive data and directly transmit it to the corresponding channel of PCS without the need for path switching; PCS→PMA TX process: Data output from PCS is sent directly through line pairs 0-3 without the need for path switching.

[0054] Scenario 2: Pair 1 on the other end is damaged, while the other three pairs are normal and not out of order. PMA RX→PCS process: Data is received through line pairs 0 and 2 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data channels are output to the PCS; PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 2.

[0055] Scenario 3: Pairs 1 and 2 of the other end are damaged, while the other two pairs are normal and not out of order. PMA RX→PCS process: Data is received through line pairs 0 and 3 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data channels are output to the PCS; PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 3.

[0056] Scenario 4: The other end wire pairs 1 and 2 are damaged and out of order (the other end wire pair 0 is connected to the local end wire pair 1, and the other end wire pair 3 is connected to the local end wire pair 0). PMA RX→PCS process: Data is received via line pairs 0 and 1 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data streams are output to the PCS. PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 1.

[0057] The transmission method of the present invention can be applied to any one of the following physical layers: the local physical layer, the remote physical layer, the physical layer acting as the receiver in both the local and remote physical layers, and the physical layer acting as the sender in both the local and remote physical layers. That is, each step of the above method can be executed by the local physical layer, by the remote physical layer, by the physical layer acting as the receiver during data interaction, or by the physical layer acting as the sender during data interaction.

[0058] This invention provides a transmission system for Ethernet transmission line connection failure states, used to implement the transmission method described above for Ethernet transmission line connection failure states. Figure 4 As shown, it includes: The wire pair status monitoring unit 2 is used to detect the status of multiple wire pairs between the local physical layer and the remote physical layer in real time, and obtain the wire pair status monitoring results, which include wire pair status information and wire pair out-of-order mapping information. The line pair mapping unit 3 is connected between the analog front end (AFE) 1 and the physical medium connection sublayer 4, and is also connected to the line pair status monitoring unit 2. It is used to configure the line pair mapping according to the line pair status monitoring results, so as to execute the automatic negotiation process on the line pair after the line pair mapping configuration. The line pair switching unit 5 is connected between the physical medium connection sublayer 4 and the physical coding sublayer 6, and is also connected to the line pair status monitoring unit 2. It is used to perform data path cross-switching on multiple line pairs according to the line pair out-of-order mapping information, and to perform rate clock adaptation and parallel-to-serial conversion or serial-to-parallel conversion on the line pairs after cross-switching, so as to realize data transmission on the line pairs.

[0059] Specifically, in this embodiment, by optimizing and adjusting the traditional Ethernet general architecture, functions such as wire pair status monitoring, wire pair mapping in the digital domain, and wire pair switching are added, thereby achieving compatibility with traditional Ethernet. Even when a single or two pairs of twisted pairs are abnormal, stable link establishment and transmission are still achieved, and compatibility with all wire pair out-of-order scenarios under normal conditions, including wire breakage or wire pair out-of-order.

[0060] The core architecture of this invention comprises the following functional units in sequence according to signal transmission logic: Analog Front-End 1 (AFE), Pair Status Monitoring Unit 2, Pair Mapping Unit 3, Physical Medium Connection Sublayer 4, Pair Switching Unit 5, and Physical Encoding Sublayer 6. The Analog Front-End 1 (AFE) provides the clock, performs digital-to-analog / analog-to-digital conversion, and adjusts signal gain, laying the hardware foundation for signal transmission and analysis. The Pair Status Monitoring Unit 2 detects the normal / abnormal states and out-of-order mapping relationships of the pairs in real time, providing a basis for subsequent adaptation and adjustment. The Pair Mapping Unit 3 executes the pair mapping configuration based on the monitoring results, ensuring normal execution of automatic negotiation in different scenarios. The Physical Medium Connection Sublayer 4 (PMA) connects the Physical Encoding Sublayer 6 (PCS) with the physical medium, performing parallel-to-serial / serial-to-parallel signal conversion, equalization compensation, and timing calibration to adapt to the transmission characteristics of the medium. The Pair Switching Unit 5 dynamically adjusts the data path to achieve correct data exchange and rate adaptation in abnormal or out-of-order scenarios. The Physical Encoding Sublayer 6 (PCS) performs data encoding / decoding, CRC verification, and clock embedding to ensure the reliability and synchronization of data transmission.

[0061] Specifically, the analog front-end 1 is a traditional Ethernet standard component, whose core components include a phase-locked loop (PLL), a phase interpolator (PI), a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), and a variable gain amplifier (VGA). The PLL provides a stable and synchronized clock signal to each functional unit of the chip, ensuring overall timing consistency. The PI tracks the frequency and phase offset of the signal through a phase-hopping mechanism, ensuring clock synchronization accuracy. The DAC converts the digital baseband signal into an analog differential signal suitable for twisted-pair transmission, completing the digital-to-analog conversion. The ADC converts the received analog differential signal into a digital signal, providing input for subsequent digital processing modules. The VGA dynamically adjusts the gain of the received analog signal, providing an input signal with an appropriate swing for the ADC, ensuring analog-to-digital conversion accuracy.

[0062] Line Pair Status Monitoring Unit 2 is responsible for line pair status detection and out-of-order identification, providing accurate decision-making basis for subsequent line pair mapping and data exchange, and includes two main sub-functions: The wire pair status monitoring function works as follows: It continuously transmits wire pair status identification information simultaneously on all four twisted pairs at random time intervals. Simultaneously, it negotiates the wire pair status with the peer device through time-division listening and a random backoff period after a conflict. The negotiation logic is as follows: If the peer device is detected as supporting this invention's negotiation function, the twisted pair status is simultaneously determined (normal / abnormal); when all four pairs are normal, it switches to wire pair 0 / 1 for the traditional automatic negotiation process; during time-division listening, if a conflict occurs, it backoffs based on the random value in the linear feedback shift register and retransmits; when a wire pair is damaged but the number of normal wire pairs is ≥2, it automatically selects two normal wire pairs to initiate the traditional negotiation process; if the peer device is detected as a traditional Ethernet device, it directly switches to the traditional automatic negotiation process to establish a link, ensuring compatibility.

[0063] The out-of-order pair detection function operates as follows: it is implemented internally within the chip without the need for interface conversion. Specifically, it involves simultaneously and continuously transmitting pair identification information at random time intervals across all four twisted-pair lines. Simultaneously, it negotiates the twisted-pair status with the peer device through time-division multiplexing and random backoff after a conflict. The negotiation logic is as follows: if the peer device supports this negotiation function, it synchronously parses the pair identification information; during time-division multiplexing, it backoffs based on the random value in the linear feedback shift register and retransmits when a conflict occurs; when all four pairs are normal, it switches to the traditional automatic negotiation process for pair 0 / 1; when the four pairs are out of order, it selects the pair with the smallest sequence number based on the pair identification information for the traditional automatic negotiation process; if the peer device is a traditional Ethernet device, it directly switches to the traditional automatic negotiation process to establish a link, ensuring compatibility.

[0064] In the wire pair mapping unit 3, the receiving side includes a first data selector MUX31 and a second data selector MUX32, which are used to select and switch wire pairs, respectively, to output the two data signals adc_data and two clock signals adc_clk from two normal wire pairs to the Physical Medium Connection Sublayer 4 (PMA), realizing the wire pair sequence number mapping alignment for any four pairs and two pairs of wires at 1000M and above. The transmitting side includes a third data selector MUX33 and a fourth data selector MUX34, which are used to reverse-map the two parallel data output from the Physical Medium Connection Sublayer 4 (PMA) back to the corresponding wire pair channels in the physical layer. The wire pair mapping unit 3 can perform precise configuration of wire pair mapping in the digital domain based on the wire pair status information and wire pair out-of-order mapping information output by the wire pair status monitoring unit 2 without the need for additional conversion interfaces and without changing analog data paths such as ADCs, ensuring the normal execution of the Ethernet auto-negotiation process. For example, the specific scenario is as follows: Scenario 1: All 4 pairs of lines are normal and there is no disorder. Mapping rules: Establish a mapping relationship between local line pair 0 and remote line pair 0, establish a mapping relationship between local line pair 1 and remote line pair 1, establish a mapping relationship between local line pair 2 and remote line pair 2, and establish a mapping relationship between local line pair 3 and remote line pair 3.

[0065] Automatic negotiation channel: Traditional automatic negotiation is performed on local wire pair 0 and local wire pair 1 to complete the establishment of Ethernet link and parameter negotiation.

[0066] Scenario 2: Pair 1 on the other end is damaged, while the other three pairs are normal and not out of order. Mapping rules: Establish a mapping relationship between local line pair 0 and remote line pair 0, establish a mapping relationship between local line pair 2 and remote line pair 2, and establish a mapping relationship between local line pair 3 and remote line pair 3.

[0067] Automatic negotiation channel: The traditional automatic negotiation process is performed on local wire pair 0 and local wire pair 2 to ensure that an Ethernet link can still be established normally even if a single twisted pair is faulty.

[0068] Scenario 3: Pair 1 and pair 2 of the peer wire are damaged, while the other two pairs are normal and not out of order. Mapping rules: A mapping relationship is established between local line pair 0 and remote line pair 0; a mapping relationship is established between local line pair 3 and remote line pair 3. Automatic negotiation channel: The traditional automatic negotiation process is performed on local wire pair 0 and local wire pair 3 to ensure that an Ethernet link can still be established normally in the event of an abnormality in the twisted pair cable.

[0069] Scenario 4: The peer wire pair 1 and peer wire pair 2 are damaged and out of order, i.e. peer wire pair 0 is connected to this wire pair 1, and peer wire pair 3 is connected to this wire pair 0. Mapping rules: A mapping relationship is established between local line pair 0 and opposite line pair 1, and a mapping relationship is established between local line pair 3 and opposite line pair 0.

[0070] Automatic negotiation channel: The traditional automatic negotiation process is performed between peer line pair 0 and peer line pair 3 and local line pair 0 and local line pair 1 to ensure that the Ethernet automatic negotiation process can still be executed normally under complex working conditions where there are both disconnections and out-of-order connections.

[0071] The Physical Medium Connection Sublayer 4 (PMA) is a traditional Ethernet standard component that connects the PCS (Physical Connector System) to the transmission medium (twisted pair). It is a key intermediate unit for signal adaptation and transmission. On the transmitting side, it performs parallel-to-serial signal conversion, signal pre-emphasis processing, and drive amplification to adapt to the signal characteristics after DAC digital-to-analog conversion, ensuring signal transmission capability. On the receiving side, it performs serial-to-parallel signal conversion, feedforward equalization (FFE), and decision feedback equalization (DFE) hybrid equalization compensation to repair signal distortion caused by twisted pair transmission and restore clock synchronization. At the same time, it calibrates the timing and phase of multi-channel signals, monitors the link transmission status in real time, and provides feedback.

[0072] like Figure 4 As shown, the receiving side of the PMA operates under the first clock signal clk. The receiving modules corresponding to the four PMA_RX0, PMA_RX1, PMA_RX2, and PMA_RX3 output four second data signals data_in_0, data_in_1, data_in_2, and data_in_3 based on the two parallel data signals output from the line pair mapping unit 3. The transmitting side consists of the four PMA_RX0, PMA_RX1, PMA_RX2, and PMA_RX3 transmitting modules, which output two parallel data signals based on one of tx_data_in and tx_data_in_0x2, one of tx_data_in and tx_data_in_1x2, and tx_data_in_2 and tx_data_in_3 from the line pair switching unit 5.

[0073] Furthermore, in the event of a wire breakage fault, the local and remote devices use two pairs of twisted-pair cables to perform a self-negotiation process to achieve data transmission. The Physical Medium Connection Sublayer 4 (PMA) is also used to unify the output of the two parallel data streams into the format of the signals output by PMA_RX0 and PMA_RX1 when only two parallel data streams are received.

[0074] Specifically, assuming the receiving device receives data from local wire pair 2 and local wire pair 3, the original output signals should be data_in_2 and data_in_3 according to the initial data output logic. However, for the sake of standardization and uniformity in subsequent data processing, this embodiment redefines these two signals, defining data_in_2 as data_in_0 and data_in_3 as data_in_1.

[0075] To further illustrate this with a practical example, such as... Figure 5As shown, when local wire pair 1 and local wire pair 2 are damaged, wire pair 0 of the peer device can receive data from local wire pair 3, and wire pair 1 of the peer device can receive data from local wire pair 0. This data, after being converted by an analog-to-digital converter (ADC), enters the wire pair mapping unit 3. A specific mapping relationship exists in the wire pair mapping unit 3: local wire pair 0 maps to peer wire pair 3, and local wire pair 1 maps to peer wire pair 0. Then, the data is transmitted to the PMA and processed by the PMA_RX0 and PMA_RX3 transmitting modules. The original output signals should be data_in_0 and data_in_3, but for the convenience and consistency of subsequent processing, they are redefined as data_in_0 and data_in_1. Afterward, this data enters the wire pair switching unit 5, where serial-to-parallel conversion and multiplexer (MUX) selection operations are performed. The specific process is as follows... Figure 4 As shown.

[0076] The wire pair switching unit 5 is used to dynamically perform cross-switching of data paths, rate clock adaptation, and parallel-to-serial / serial-to-parallel conversion based solely on the wire pair status (normal / damaged) and out-of-order mapping information (wire pair connection correspondence) output by the wire pair status monitoring unit 2, while keeping the analog data path such as ADC unchanged. This enables abnormal wire pair avoidance and out-of-order wire pair correction, ensuring that in Ethernet scenarios such as 10GBASE-T, data can be transmitted correctly regardless of whether the wire pair is damaged or whether there is out-of-order connection, and without affecting the normal operation of the Ethernet auto-negotiation process.

[0077] The receiving side of the line-pair switching unit 5 includes a first serial-to-parallel converter SP1, a second serial-to-parallel converter SP2, a fifth data selector MUX51, and a sixth data selector MUX52. The first serial-to-parallel converter SP1 operates under the second clock signal clk_div2 and is used to convert the data signal data_in_0 from serial to parallel, outputting data_in_x2. The second serial-to-parallel converter SP2 operates under the second clock signal clk_div2 and is used to convert the data signal data_in_1 from serial to parallel, outputting data_in_x2. The fifth data selector MUX51 is used to select the data signal from the second serial-to-parallel converter SP1. The serial-to-parallel converter SP1 outputs data_in_x2 and PMA_RX0 outputs data_in_0, which are then output to the physical coding sublayer 6 (PCS). The sixth data selector MUX52 is used to select one of the outputs from the second serial-to-parallel converter SP2 and PMA_RX1 outputs data_in_1, which are then output to the physical coding sublayer 6 (PCS). The line pair switching unit 5 is also used to transmit data_in_2 output from PMA_RX2 and data_in_3 output from PMA_RX3 to the physical coding sublayer 6 (PCS).

[0078] The transmitting side of the line-pair switching unit 5 includes a first parallel-to-serial converter PS1, a second parallel-to-serial converter PS2, a seventh data selector MUX53, and an eighth data selector MUX54. The first parallel-to-serial converter PS1 operates under the first clock signal clk and is used to perform parallel-to-serial conversion on the data signal tx_data_in_0x2 output from the Physical Coding Sublayer 6 (PCS), outputting tx_data_in. The second parallel-to-serial converter PS2 operates under the first clock signal clk and is used to perform parallel-to-serial conversion on the data signal tx_data_in_1x2 output from the Physical Coding Sublayer 6 (PCS), outputting tx_data_in. The seventh data selector MUX53 is used to select data from the first parallel-to-serial converter PS1. The output tx_data_in and the data signal tx_data_in_0x2 output from the physical coding sublayer 6 (PCS) are selected and output to PMA_TX0; the eighth data selector MUX54 is used to select one of the output tx_data_in and the data signal tx_data_in_1x2 output from the second parallel-to-serial converter PS2 and output to PMA_RX1; the line pair switching unit 5 is also used to output the data signal tx_data_in_2 output from the physical coding sublayer 6 (PCS) to PMA_RX2, and to output the data signal tx_data_in_3 output from the physical coding sublayer 6 (PCS) to PMA_RX3.

[0079] Taking 10GBASE-T as an example, the typical working logic is as follows: Scenario 1: All 4 pairs of lines are normal and there is no disorder. PMA RX→PCS process: Line pairs 0-3 synchronously receive data and directly transmit it to the corresponding channel of PCS without the need for path switching; PCS→PMA TX process: Data output from PCS is sent directly through line pairs 0-3 without the need for path switching.

[0080] Scenario 2: Pair 1 on the other end is damaged, while the other three pairs are normal and not out of order. PMA RX→PCS process: Data is received through line pairs 0 and 2 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data channels are output to the PCS; PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 2.

[0081] Scenario 3: Pairs 1 and 2 of the other end are damaged, while the other two pairs are normal and not out of order. PMA RX→PCS process: Data is received through line pairs 0 and 3 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data channels are output to the PCS; PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 3.

[0082] Scenario 4: The other end wire pairs 1 and 2 are damaged and out of order (the other end wire pair 0 is connected to the local end wire pair 1, and the other end wire pair 3 is connected to the local end wire pair 0). PMA RX→PCS process: Data is received via line pairs 0 and 1 (transmission rate 800MHz), and after serial-to-parallel conversion at a rate of 400MHz, 4 parallel data streams are output to the PCS. PCS→PMA TX process: Receive 4 parallel data streams (transmission rate 400MHz) from PCS, convert them to serial-to-parallel data at 800MHz, and then transmit them to the other end via line pairs 0 and 1.

[0083] It should be noted that the above four scenarios are merely illustrative examples for understanding purposes and are not intended to limit the scope of this invention.

[0084] Physical Coding Sublayer 6 (PCS) is a traditional Ethernet standard component located between the MAC layer and the PMA layer. It is a key unit for ensuring the reliability and synchronization of data transmission. It is used to perform data encoding and decoding operations, realize signal DC balance and clock embedding, and ensure stable signal transmission in the physical medium. At the same time, it transmits link control signals, performs CRC check to detect transmission errors, and handles the synchronization and coordination of multi-channel data.

[0085] Addressing the issues of insufficient fault tolerance and limited out-of-order compatibility in existing high-speed Ethernet cables, this invention utilizes only digital domain processing, eliminating the need for additional conversion interfaces. It achieves stable link establishment and transmission even in the event of single or double-pair twisted-pair cable malfunctions, and is compatible with all out-of-order scenarios under normal conditions, including cable breaks. Furthermore, the entire process requires no manual intervention, effectively avoiding the costs of replacing and redeploying twisted-pair cables and reducing maintenance expenses. In addition, it significantly improves the flexibility and reliability of Ethernet deployment, adapting to complex cabling environments and contributing to the efficient and stable operation of industrial control, data centers, and other scenarios, further expanding the application boundaries of high-speed Ethernet.

[0086] like Figure 5 The diagram shown is a schematic of out-of-order mapping of Ethernet transmission line connections. Figure 5Taking the example of damaged local wire pairs 1 and 2, with remote wire pair 0 connected to local wire pair 3, and remote wire pair 1 connected to local wire pair 0, the process is divided into three stages when wire pairs are broken and out of order. Stage 1: Monitor wire pair status to obtain wire pair status information and out-of-order mapping information; Stage 2: Wire pair mapping unit 3 performs data link mapping in the digital domain based on the monitoring results, and then performs self-negotiation to determine master / slave devices, the maximum supported rate, and other information; Stage 3: Based on the negotiated rate and wire pair status, perform clock and data link (including PMA and PCS link mapping) to ensure link and data transmission. The entire process is performed in the digital domain, requiring no additional adapter interfaces or additional wire pairs.

[0087] This invention achieves two major breakthroughs while remaining fully compatible with traditional Ethernet protocols: Firstly, it enhances the fault tolerance of wire pairs. When a single or multiple twisted pairs malfunction, no manual intervention is required; the switching and data processing operations can be completed automatically within the digital domain, thus ensuring the normal establishment of a communication link and stable data transmission.

[0088] Secondly, it has full-scenario out-of-order compatibility. This invention can adapt to a variety of complex scenarios without additional conversion interfaces, including situations where all wire pairs are connected out of order in traditional Ethernet, broken wire scenarios, and scenarios where broken wires and out-of-order wires coexist. There is no need to replug or adjust the twisted pair cable, which greatly improves the flexibility of network deployment.

[0089] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present invention.

Claims

1. A transmission method in an abnormal state of an Ethernet transmission line connection, characterized by, The method comprises the following steps: S1, detecting the state of a plurality of wire pairs between a local physical layer and a remote physical layer in real time to obtain wire pair state monitoring results, wherein the wire pair state monitoring results comprise wire pair state information and wire pair out-of-order mapping information; S2, configuring wire pair mapping according to the wire pair state monitoring results, and performing an automatic negotiation process on the wire pairs after the wire pair mapping configuration; S3, performing data path cross switching on the plurality of wire pairs according to the wire pair out-of-order mapping information, and performing rate clock adaptation and parallel-serial conversion or serial-parallel conversion on the wire pairs after the cross switching, and realizing data transmission on the wire pairs.

2. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 1, characterized by, The step S1 comprises: S11, continuously transmitting wire pair state identification information on all wire pairs between the local physical layer and the remote physical layer at a preset time interval; S12, if it is detected that the remote end is a first type device, analyzing the wire pair state identification information received on each wire pair to determine the wire pair state monitoring results.

3. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 2, characterized by, In the step S12, all the wire pairs receive the wire pair state identification information in a time-division listening manner; If a conflict exists on any wire pair during the time-division listening, backoff is performed according to a random value in a linear feedback shift register, and the wire pair state identification information is retransmitted to the wire pair with the conflict after the backoff time ends.

4. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 2, characterized by, The preset time interval is a random time interval.

5. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 1, characterized by, In the step S1, if it is detected that the remote end is a second type device, switching to perform an automatic negotiation process to directly establish a link.

6. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 1, characterized by, Each wire pair has a unique wire pair serial number, and the wire pair mapping configuration in the step S2 comprises: configuring wire pair mapping for wire pairs without out-of-order according to a preset first mapping rule, wherein the first mapping rule is a one-to-one mapping of wire pair serial numbers; and configuring wire pair mapping for wire pairs with out-of-order according to a preset second mapping rule, wherein the second mapping rule is a cross mapping of wire pair serial numbers.

7. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 1, characterized by, In the step S2, the automatic negotiation process performed on the wire pairs after the wire pair mapping configuration comprises: when there are at least two normal wire pairs in the wire pair state monitoring results, after completing the wire pair mapping configuration, optionally performing the automatic negotiation process on two normal wire pairs.

8. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 7, characterized by, Each wire pair has a unique wire pair serial number, and the optional automatic negotiation process performed on the two normal wire pairs comprises: selecting two normal wire pairs with the smallest wire pair serial numbers to perform the automatic negotiation process.

9. The transmission method in an abnormal state of an Ethernet transmission line connection according to claim 1, characterized by, The step S3 comprises: when all wire pairs are normal and there is no wire pair out-of-order in the wire pair state monitoring results, performing data transmission through all the wire pairs; when there are abnormal wire pairs in the wire pair state monitoring results, but there are at least two normal wire pairs and no wire pair out-of-order exists in the at least two normal wire pairs, optionally performing rate clock adaptation, parallel-serial conversion or serial-parallel conversion on the two normal wire pairs to realize data transmission; and when there are abnormal wire pairs in the wire pair state monitoring results, but there are at least two normal wire pairs and no wire pair out-of-order exists in the at least two normal wire pairs, optionally performing rate clock adaptation, parallel-serial conversion or serial-parallel conversion on the two normal wire pairs to realize data transmission. When there are at least two normal pairs and a pair disorder in the pair state monitoring result, the data path cross switching is performed on all the pairs according to the pair disorder mapping information, optionally, rate clock adaptation, parallel-serial conversion or serial-parallel conversion is performed on two normal pairs, and data transmission is realized.

10. A transmission system in an abnormal state of an Ethernet transmission line connection, characterized by The method for implementing the transmission method of the Ethernet transmission line in the abnormal state comprises the following steps: A pair state monitoring unit is configured to detect the state of a plurality of pairs between a local physical layer and a remote physical layer in real time to obtain a pair state monitoring result, wherein the pair state monitoring result comprises pair state information and pair disorder mapping information. A pair mapping unit is connected between an analog front end and a physical medium connection sublayer and connected to the pair state monitoring unit, configured to perform pair mapping configuration according to the pair state monitoring result, and execute an automatic negotiation process on the pair after the pair mapping configuration. A pair switching unit is connected between the physical medium connection sublayer and a physical coding sublayer and connected to the pair state monitoring unit, configured to perform data path cross switching on the plurality of pairs according to the pair disorder mapping information, and perform rate clock adaptation, parallel-serial conversion or serial-parallel conversion on the pairs after the cross switching, and realize data transmission on the pairs.

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