WO2023141777A1

WO2023141777A1 - Communication method and network device

Info

Publication number: WO2023141777A1
Application number: PCT/CN2022/073868
Authority: WO
Inventors: 侯思剑; 付纳科; 欧斯思
Original assignee: 华为技术有限公司
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2023-08-03
Also published as: CN116806418A

Abstract

The embodiments of the present application relate to the technical field of communications. Provided are a communication method and a network device, which can reduce wasted bandwidth. The method comprises: a sending device receiving data code blocks and flag code blocks of a plurality of physical coding sub-layer (PCS) channels; inserting an Ethernet service identifier into the flag code blocks of the plurality of PCS channels, wherein the Ethernet service identifier is used for indicating an Ethernet service which is carried by a data code block in the PCS channel where the flag code blocks are located; mapping the data code blocks and flag code blocks in the plurality of PCS channels into an optical transport network container; and sending the optical transport network container to an optical transport network.

Description

Communication method and network equipment

technical field

The present application relates to the technical field of communication, and in particular to a communication method and network equipment.

Background technique

The 802.3-based Ethernet defined by the Institute of Electrical and Electronics Engineers (IEEE) has been used as a service interface in various occasions. At present, OIF (optical internetworking forum, Optical Internet Forum) is discussing the expansion of traditional Ethernet application scenarios to support functions such as sub-rate, channelization, and inverse multiplexing for Ethernet services, and calls this Ethernet technology It is Flex Ethernet (Flexible Ethernet, referred to as FlexE). For example, for the sub-rate application scenarios of Ethernet services, it is supported to transmit 50G Ethernet services using the existing 100GE PMD (physical medium dependent, physical medium dependent sublayer). For the inverse multiplexing scenario of Ethernet services, it supports the transmission of 200G Ethernet services using two existing 100GE PMDs. The channelization application scenario for Ethernet services combines sub-rate and inverse multiplexing technologies, and supports bundling PMD inverse multiplexing of multiple channels of standard Ethernet into a large-bandwidth FlexE service layer, which carries multiple channels of FlexE Services, such as a 250G and five 10G FlexE services are transmitted through a 300G FlexE service layer, and the 300G FlexE service layer is formed by inverse multiplexing of 3 channels of 100GEPMD. In traditional OTN (optical transport network, optical transport network) network transmission, the destinations of the various FlexE services carried by the FlexE service layer are different, resulting in the inability to transmit the FlexE service layer as a whole. The traditional technical solution is to identify each FlexE service, and directly map each FlexE service to an ODUk (Optical Channel Data Unit-k, optical channel data unit k) container or ODUflex (Optical Channel Data Unit-flexible, flexible optical channel data unit) A FlexE service corresponds to an ODUk/ODUflex container. In this way, when the FlexE service exceeds the bandwidth of a single line interface of the traditional OTN network, the bandwidth of the line interface must be upgraded, and the traditional OTN network needs to be reconstructed end-to-end according to the service path, resulting in high network construction costs of the OTN network.

In order to allow the FlexE service with large bandwidth to be transmitted using multiple small-bandwidth ODUk/ODUflex containers, the above-mentioned problems can be solved. Usually, the FlexE service is divided into multiple data queues that meet the requirements of small-bandwidth ODUk/ODUflex containers, and additional control code blocks for identifying FlexE services are inserted between the data code blocks that make up each data queue, and the additional down-inserted control code blocks The code block will occupy the bandwidth, and the previous stage needs to reserve the bandwidth in advance, and perform rate adaptation in advance, resulting in a waste of bandwidth resources.

Contents of the invention

Embodiments of the present application provide a communication method and network equipment, which can reduce bandwidth waste.

In a first aspect, a communication method is provided. The method can be performed by a sending device, and the sending device can also be a module or a chip in the sending device, and the sending device can also be a chip or a system on a chip. The method includes the following steps: first, the sending device receives a plurality of physical coding sublayer PCS The data code block and marker code block of the channel; the Ethernet service identifier is inserted into the marker code block of multiple physical coding sublayer PCS channels, and the Ethernet service identifier is used to indicate the data code block in the PCS channel where the marker code block is located Ethernet services; the data code blocks and marker code blocks in multiple PCS channels are mapped to an optical transport network container; exemplary, the optical transport network container includes an optical channel data unit k container or a flexible optical channel data unit container ; Send the OTN container to the OTN. In the above scheme, when the sending device usually receives data code blocks and marker code blocks of multiple physical coding sublayer PCS channels, each PCS channel includes a plurality of marker code blocks set at intervals, and adjacent marker code blocks include Multiple data code blocks used to carry the original data stream. In this solution, since the sending device directly inserts the Ethernet service identifier into the marking code blocks of the multiple physical coding sublayer PCS channels of the Ethernet service, it does not carry the data on the PCS channel. The code blocks of multiple physical sublayer PCS channels are used for other processing, and then the data code blocks and marker code blocks in multiple PCS channels are mapped to an optical transport network container. For example, multiple physical sublayer PCS The sub-data streams carried by the channel are respectively combined into one or more data streams, and the sub-data streams include the data code blocks in the PCS channel and the data queue formed by the marked code blocks; each data stream can include at least one physical sub-layer PCS channel bearer Sub-data streams, and then map the combined data streams to an optical transport network container with matching bandwidth and send them to the optical transport network, so that the PCS channel itself has an identification code block for data block alignment, because each The identification code block corresponds to a PCS channel, and in the scheme of the present application, the identification code block simultaneously carries the Ethernet service identifier used to indicate the Ethernet service carried by the data code block in the PCS channel where the marking code block is located, so receiving After receiving the OTN container transmitted by the OTN, the device can align the data code blocks of each PCS channel according to the identification code block, and align the same The data code blocks in the PCS channel corresponding to the Ethernet service identifier are combined to restore the original data stream. In this way, since there is no need to additionally insert control code blocks between multiple data code blocks of the PCS channel, bandwidth occupation is avoided.

In a possible implementation manner, the marked code block includes an alignment identifier AM, and the Ethernet service identifier is set in the BIP ₇ field of the AM. Taking the 100GE Ethernet service as an example, the above-mentioned AM can be used for the marker code block, and the encoding (encoding) corresponding to AM includes M ₀ , M ₁ , M ₂ , BIP ₃ , M ₃ , M ₄ , M ₅ , M ₆ , BIP ₇ field. In the embodiment of the present application, an Ethernet service identifier (such as a client ID (Client ID, CID)) can be set in the BIP ₇ field of the AM.

In a possible implementation, the codeword mark includes a rate matching RC identifier, the identifier of the PCS channel is carried in bits [29:26] of the rate matching RC identifier, and the Ethernet service identifier is carried in bits [65:58] of the RC identifier ]. Taking the 200G/400GE Ethernet service as an example, in the G.709 protocol, the code word identification (code word) of the Reed Solomon forward error correction (reed solomon forward error correction, RSFEC) layer of the 200G/400GE Ethernet service marker, CWM) that AM is replaced by a rate matching (rate compensation, RC) mark. The positions of RC and AM in the PCS channel are the same and the content is different. Since the protocol needs to scramble the RC and the data code block according to the PCS channel where they are located, the RC code cannot directly distinguish the PCS channel. In the embodiment of this application In RC0\RC1, bit[29:26] can enter and exit the number of PCS channel. Fill in the Ethernet service identifier in Bit [65:58] (for example, it may specifically be a client identifier (Client ID, CID)). Among them, each PCS channel of the 200GE Ethernet service supports the minimum particle bandwidth of 200/8=25G, then the 200GE Ethernet service has 8 pairs of RCs, and bits [29:26] in 8 different RC0/1 are respectively Fill in 0x0/0x1/0x2/0x3.../0x7 in sequence; each PCS channel of 400GE Ethernet supports the smallest particle that can be split into 400/16=25G. Then the 400GE Ethernet service has 16 pairs of RCs, and bits [29:26] in 16 different RC0/1 are respectively filled with 0x0/0x1/0x2/0x3.../0xf in sequence.

In a possible implementation, a PCS channel includes a plurality of marked code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marked code blocks, and each PCS channel corresponds to a marked code block; the data code The block carries the original data flow of the Ethernet service.

In a possible implementation manner, the marker code block and the data code block are 66-Bit code blocks formed in a 64/66-Bit encoding manner.

In a possible implementation manner, in one PCS channel, there are 16383 data code blocks between two adjacent marker code blocks.

In a second aspect, a communication method is provided. The method can be performed by a receiving device, and the receiving device can also be a module or a chip in the receiving device, and the receiving device can also be a chip or a system on a chip. The method includes the following steps: first, the receiving device transmits multiple Data code blocks and marker code blocks in multiple PCS channels are respectively demapped in an optical transport network container. The marker code blocks contain Ethernet service identifiers, and the Ethernet service identifiers are used to indicate the PCS channels in which the marker code blocks are located. The Ethernet service carried by the data code block; secondly, the receiving device recovers the original data flow of the Ethernet service from the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located. In this way, since the PCS channel itself has an identification code block for data block alignment, and each identification code block corresponds to a PCS channel, and in the solution of the present application, the identification code block carries the Ethernet service identification, so the receiving device After receiving the optical transport network container transmitted by the optical transport network, the data code blocks of each PCS channel can be aligned according to the identification code block, and the same Ethernet The data code blocks in the PCS channel corresponding to the network service identifier are combined to restore the original data stream. In this way, since there is no need to additionally insert control code blocks between multiple data code blocks of the PCS channel, bandwidth occupation is avoided.

In a possible implementation manner, the tag code block includes an AM, and the Ethernet service identifier is set in the BIP ₇ field of the AM.

In a possible implementation, the tag code block includes a rate-matching RC identifier, the identifier of the PCS channel is carried in bits [29:26] of the rate-matching RC identifier, and the Ethernet service identifier is carried in bits [65] of the rate-matching RC identifier. :58].

In a possible implementation, the data code block includes a 66Bit code block; the receiving device recovers the original data stream of the Ethernet service from the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located, including : The data code blocks in the PCS channel where the marked code blocks with the same Ethernet service identifier are located are decoded in a 64/66Bit decoding manner and combined into the original data stream of the Ethernet service.

In a third aspect, a sending device is provided, the sending device may be a module or a chip in the sending device, the sending device may also be a chip or a system on a chip, including: a receiver, configured to receive multiple physical coding sublayer PCS channels The data code block and the marking code block; the processor is configured to insert an Ethernet service identifier into the marking code blocks of the plurality of physical coding sublayer PCS channels, and the Ethernet service identifier is used to indicate the marking code block The Ethernet service carried by the data code block in the PCS channel where it is located; the data code block and the marker code block in the multiple PCS channels are mapped to an optical transport network container; the transmitter is used to The OTN container is sent to the OTN.

In a fourth aspect, a receiving device is provided, the receiving device may be a module or a chip in the receiving device, the receiving device may also be a chip or a system on a chip, including: a receiver, configured to receive multiple an optical transport network container; a processor, which is used to respectively demap data code blocks and mark code blocks in multiple PCS channels in multiple optical transport network containers transmitted in the optical transport network, and the mark code blocks contain Ethernet service identifier, the Ethernet service identifier is used to indicate the Ethernet service carried by the data code block in the PCS channel where the marker code block is located; the marker code with the same Ethernet service identifier The data code block in the PCS channel where the block is located recovers the original data flow of the Ethernet service.

A fifth aspect provides a computer-readable storage medium for storing a computer program, and the computer program includes instructions for executing the communication method described in the first aspect or the second aspect and possible implementations thereof.

In a sixth aspect, a computer program product is provided, the computer program product comprising: computer program code, when the computer program code is run on a computer, the computer executes the first aspect or the second aspect and its possibility The communication method described in the implementation of the .

According to a seventh aspect, a communication system is provided, and the communication system includes the sending device described in the above aspect and the receiving device described in the above aspect.

Wherein, the technical effect brought by any design method in the third aspect can refer to the technical effect brought by the different design methods in the first aspect above, and will not be repeated here. For the technical effects brought about by any design method in the fourth aspect, please refer to the technical effects brought about by the different design methods in the second aspect above, which will not be repeated here. For the technical effects brought about by any one of the design methods in the fifth aspect, the sixth aspect and the seventh aspect, please refer to the technical effects brought about by the different design methods in the above-mentioned first aspect and the second aspect, and will not be repeated here.

Description of drawings

FIG. 1 is a schematic diagram of a partial architecture of an Ethernet provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a field structure of an AM provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of an Ethernet communication system provided in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a sending device and a receiving device provided in an embodiment of the present application;

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

FIG. 6 is a schematic diagram of a transmission method of a data code block and a marker code block provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of an RC provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an RC provided by another embodiment of the present application;

FIG. 9 is a schematic diagram of combining sub-data streams of multiple PCS channels into multiple data streams according to an embodiment of the present application;

FIG. 10 is a schematic diagram of a communication method provided by another embodiment of the present application;

FIG. 11 is a schematic diagram of splitting multiple data streams into sub-data streams of multiple PCS channels provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a sending device provided by another embodiment of the present application;

Fig. 13 is a schematic structural diagram of a receiving device provided by another embodiment of the present application.

Detailed ways

The following will describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them.

In Ethernet, an Ethernet port usually appears as a data-oriented logical concept, called a logical port or simply a port, and an Ethernet physical interface appears as a hardware concept, called a physical interface or simply an interface. Typically, an Ethernet port is marked with a media access control address (MAC) address. Traditionally, the speed of an Ethernet port is determined based on the speed of the Ethernet physical interface. In general, the maximum bandwidth of an Ethernet port corresponds to the bandwidth of an Ethernet physical interface, such as 10 megabit per second (megabit per second, Mbps), 100Mbps, 1000Mbps (1Gbps), 10Gbps, 40Gbps, 100Gbps, and 400Gbps Ethernet physical interface. Ethernet has gained wide application and considerable development in the past quite a period of time. The speed of Ethernet ports has been increased by 10 times, from 10Mbps to 100Mbps, 1000Mbps (1Gbps), 10Gbps, 40Gbps, 100Gbps, and 400Gbps. The more the technology develops, the greater the granularity of the bandwidth will be, and the deviation from the actual application requirements will be more likely to occur. The bandwidth growth required by mainstream applications does not show such a 10-fold growth characteristic, such as 50Gbps, 75Gbps, 200Gbps, etc. The industry hopes to provide support for Ethernet ports (virtual connections) of bandwidths such as 50Gbps, 60Gbps, 75Gbps, 200Gbps and 150Gbps.

On the one hand, further, it is hoped that some flexible bandwidth ports can be provided, and these ports can share one or several Ethernet physical interfaces, for example, two 40GE ports and two 10GE ports share one 100G physical interface; Make flexible rate adjustments as demand changes, such as adjusting from 200Gbps to 330Gbps, or 50Gbps to 20Gbps, to improve port usage efficiency or extend its service life cycle. For fixed-rate physical links, they can be cascaded and bundled to support a stack increase in the logical port rate (for example, two 100GE physical interfaces can be cascaded and bundled to support 200GE logical ports). On the other hand, it is possible to pool the bandwidth resources obtained by flexible stacking of physical interfaces, and allocate its bandwidth to specific Ethernet logical ports according to granules (for example, 5G is a granule), so as to realize the stack cascading of several Ethernet virtual connections efficient sharing of physical link groups. As a result, the concept of FlexE came into being, and flexible Ethernet is also called flexible virtual Ethernet. FlexE supports functions such as subrate, channelization, and inverse multiplexing for Ethernet services. For example, for the sub-rate application scenarios of Ethernet services, FlexE can support the transmission of 250G Ethernet services (MAC code stream) using three existing 100GE physical interfaces. For the inverse multiplexing scenario of Ethernet services, FlexE can support the transmission of 200G Ethernet services using two existing 100GE PMD layers. For the channelization scenario of Ethernet services, FlexE can support several logical ports to share one or more physical interfaces, and can support the multiplexing of multiple low-speed Ethernet services into high-speed flexible Ethernet.

Since Ethernet is widely used as service interfaces in access networks and metropolitan area networks, the FlexE technology based on the service flow aggregation function of Ethernet technology can realize seamless connection with the Ethernet interfaces of the underlying service network. The introduction of these FlexE sub-rate, channelization and inverse multiplexing functions greatly expands the application scenarios of Ethernet, enhances the flexibility of Ethernet applications, and makes Ethernet technology gradually penetrate into the transport network field.

FlexE provides a feasible evolution direction for the virtualization of Ethernet physical links. Flexible Ethernet needs to support several virtual Ethernet data connections on a set of cascaded physical interfaces. For example, four 100GE physical interfaces are cascaded and bundled to support several logical ports. When the bandwidth of some logical ports in several logical ports decreases, the bandwidth of other logical ports increases, and the total amount of reduced bandwidth is equal to the total amount of increased bandwidth. The bandwidth of several logical ports can be flexibly adjusted at a block speed and used together. Four 100GE physical ports. FlexE draws on synchronous digital hierarchy (SDH)/optical transfer network (OTN) technology to construct a fixed frame format for physical interface transmission and implement time-division multiplexing (TDM) time slots divided. Take the existing FlexE frame format as an example. The TDM time slot division granularity of FlexE is 66 bits, which can just bear a corresponding 64B/66B bit block. A FlexE frame contains 8 lines, the position of the first 64B/66B bit block in each line is the FlexE overhead block, after the overhead block is the payload area for time slot division, with 66 bits as the granularity, corresponding to 20x1023 66-bit bearer spaces, The bandwidth of the 100GE interface is divided into 20 time slots, and the bandwidth of each time slot is about 5 Gbps. FlexE implements multiple transmission channels on a single physical interface through interleaving and multiplexing, that is, multiple time slots. Several physical interfaces can be bundled, and all time slots of the several physical interfaces can be combined to carry one Ethernet logical port. For example, 10GE needs two time slots, 25GE needs 5 time slots, etc. The 64B/66B bit blocks that can be seen on the logical port are still transmitted sequentially. Each logical port corresponds to a MAC and transmits the corresponding Ethernet message. The identification of the start and end of the message and the idle filling are the same as the traditional Ethernet. . FlexE is just an interface technology that can transmit M1/M2 bit block streams on Ethernet physical layer links. For example, 1G Ethernet uses 8/10Bit encoding, and 1GE physical layer links transmit 8/10 bit block streams; 10GE/40GE/ 100GE uses 64/66Bit encoding, and 10GE/40GE/100GE physical layer links transmit 64/66-bit block streams. With the development of Ethernet technology in the future, other encoding methods will appear, such as 128/130Bit encoding and 256/258Bit encoding. For the M1/M2 bit block stream, there are different types of bit blocks and they are clearly regulated in the standard. The code pattern definition of 64/66Bit encoding is used as an example to illustrate, in which the two bits "10" or "01" in the header are 64/66-bit block synchronization head bit, and the last 64Bit is used to carry payload data.

In addition, more specifically, the FlexE technology realizes the decoupling of the MAC layer and the physical layer by introducing the FlexE shim (shim) on the basis of IEEE802.3 (as shown by the dotted line in Figure 1). From the perspective of the position of the layer in the IEEE802.3 stack, after the data stream of a specific bandwidth reaches the MAC layer, a parallel data stream is formed through a media independent interface (MII or media independent interface), and these data streams are combined into 64-bit data signals, and then the flexible Ethernet pad (FlexEshim) performs 64B/66B encoding on the data from the MII interface to generate a 66-bit block consisting of two parts, one part is a 2-bit synchronization header, and the other part is a 64 The payload of bit, the logical serial flow of this 64B/66B block is called FlexE client (FlexE client) in FlexE technology. That is to say, the FlexE technology adds a FlexE shim layer on top of the original scramble (Scramble), bypasses the original 64B/66B codec processing, and puts the 64B/66B codec processing in the FlexE shim top of the cushion. Its realization is shown in Figure 1. Part of the FlexE architecture includes the MAC layer, the FlexE shim layer, and the physical layer. Wherein, the MAC layer belongs to a sublayer of the data link layer, and is connected to the logical link control layer. The physical layer can be divided into physical coding sublayer (physical coding sublayer, PCS), physical medium access (physical medium attachment, PMA) sublayer and PMD sublayer. FIG. 1 also shows the architecture in which the MAC layer is directly connected to the physical layer in the traditional Ethernet, and under this architecture, 64B/66B encoding is performed on the data of the MAC layer at the PCS layer. The functions of the above layers are realized by corresponding chips or modules.

In the process of sending signals, PCS is used to encode data, scrambled (scrambled), insert overhead (overhead, OH) and insert alignment markers (alignment markers, AM) and other operations; in the process of receiving signals, PCS is The inverse process of the above steps will be performed. Sending and receiving signals can be realized by different functional modules of PCS.

The format of AM defined in the existing IEEE P802.3ba standard is shown in Table 1, and the processing of AM in the standard technology is described below. In standard IEEE P802.3ba, to support deskew at the receiving PCS to align data blocks in PCS lanes and to reorder individual PCS lanes, AM is periodically added to each PCS lane. The form of AM is a specially defined 66-bit data block with a control block sync header. These AMs interrupt any data transfers already in progress, and AMs are inserted into all PCS lanes at the same time. Space for AM is created by periodically removing the inter packet gap (IPG) from the XLGMII/CGMII data stream. Other special properties of AMs are that they are not scrambled and do not conform to the encoding rules, since AM is added after the 64B/66B data block in the sending PCS channel, and AM is 64B after the data block in the receiving PCS channel /66B is removed before decoding. The purpose of AM unscrambling is to allow the receiving device to find the AM, align the data blocks in the PCS lanes, and reassemble the aggregate stream before descrambling. AM shall be inserted after every 16383 66-bit data code blocks on each PCS channel. In addition, when performing the above processing, the corresponding relationship between the number of the PCS lane (PCS lane number) and the encoding (encoding) of each channel is shown in Table 1, which makes the above processing have a basis for judgment. In the 100GbE technology, an AM is periodically added behind each channel. The role of the AM is to be responsible for the requeuing of the PCS channel and the reassembly of the overall data at the receiving end. At the receiving end, the data from the PCS channel, due to the skew in the transmission process, makes the arrival time of the data of the PCS channel different, and the order of arrival is different from that of the sending end. PCS lane number and encoding to rearrange channel data and reassemble high-speed data streams.

Table 1

Wherein, the PCS lane number is used to indicate the number of the channel, each channel has a unique number, and encodings of each PCS lane are different from each other. The above M ₀ , M ₁ , M ₂ , BIP ₃ , M ₃ , M ₄ , M ₅ , M ₆ , and BIP ₇ are all fields defined in the AM format stipulated in the IEEE 802.3 standard, and the occupied bit positions and lengths are shown in Fig. 2 can be seen. M ₄ , M ₅ , and M ₆ are bit-by-bit flips of M ₀ , M ₁ , and M ₂ respectively. Each alignment marker has two bit-interleaved parity fields BIP ₃ and BIP ₇ , BIP ₇ being the bitwise inversion of BIP ₃ .

The main functions of the PMA sublayer are link monitoring, carrier monitoring, encoding and decoding, sending clock synthesis and receiving clock recovery. The main functions of the PMD sublayer are scrambling/descrambling, coding and decoding of data streams, DC restoration and adaptive equalization of received signals.

It should be understood that the above-mentioned architecture shown in FIG. 1 is only an example, and the architecture applicable to this application is not limited to the traditional Ethernet and the FlexE architecture shown in FIG. 1. In some architectures, for example, between the MAC sublayer and the FlexE shim layer There may also be a reconciliation sublayer (reconciliation sublayer, RS) between them, which is used to provide a signal mapping mechanism between the MII and the MAC sublayer; there may also be a forward error correction (forward error correction, RS) between the PCS and the PMA sublayer. FEC) sublayer for enhancing the reliability of transmitted data, etc.

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of an Ethernet communication system provided in an embodiment of the present invention. As shown in the figure, the network devices in the Ethernet communication system in the embodiment of the present invention may at least include a sending device 100 and a receiving device Device 200. Wherein, the sending device 100 and the receiving device 200 may establish a communication connection through an optical transport network OTN. The Ethernet communication system can realize uplink transmission and downlink transmission, wherein the uplink transmission is that the sending device 100 sends the Flex Ethernet service to the OTN network, and the downlink transmission is that the receiving device 200 receives the Flex E service through the OTN network. Specifically, the network device may be a client device such as a router or a switch, or a network end device such as an Ethernet device, an OTN device, or an SDH device.

Optionally, the network device in this embodiment of the present application may also be referred to as a communication device, which may be a general-purpose device or a dedicated device, which is not specifically limited in this embodiment of the present application.

Optionally, as shown in FIG. 4 , it is a schematic structural diagram of the sending device 100 and the receiving device 200 provided in this embodiment of the present application.

Wherein, the sending device 100 includes at least one processor (in FIG. 4, it is illustrated by including a processor 101 as an example) and at least one transceiver (in FIG. 4, it is illustrated by an example of including a transceiver 103 ). Optionally, the sending device 100 may also include at least one memory (in FIG. 4, a memory 102 is used as an example for illustration), and when used as a user equipment, the sending device may also include at least one output device (the example in FIG. 4 An example of including one output device 104 is used for illustration) and at least one input device (in FIG. 4, an example of including one input device 105 is used for illustration).

The processor 101, the memory 102 and the transceiver 103 are connected through communication lines. A communication link may include a pathway for the transfer of information between the aforementioned components.

The processor 101 may be a general-purpose central processing unit (central processing unit, CPU), a microprocessor, a specific application integrated circuit (application-specific integrated circuit, ASIC), or one or more integrated circuits used to control the execution of the program program of this application. circuit. In a specific implementation, as an embodiment, the processor 301 may also include multiple CPUs, and the processor 101 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, or processing cores for processing data such as computer program instructions.

The storage 102 may be a device having a storage function. For example, it may be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other types of memory that can store information and instructions A dynamic storage device can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage ( including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be stored by a computer Any other medium, but not limited to. The memory 102 may exist independently and be connected to the processor 101 through a communication line. The memory 102 can also be integrated with the processor 101 .

Wherein, the memory 102 is used to store computer-executed instructions for implementing the solution of the present application, and the execution is controlled by the processor 101 . Specifically, the processor 101 is configured to execute computer-executed instructions stored in the memory 102, so as to implement the communication method performed by the sending device in the embodiment of the present application.

Or, optionally, in the embodiment of the present application, the processor 101 may also perform functions related to the sending device in the communication method provided in the following embodiments of the present application, and the transceiver 103 is responsible for communicating with other devices or communication networks. The embodiment of the application does not specifically limit this.

Optionally, the computer-executed instructions in the embodiments of the present application may also be referred to as application program codes or computer program codes, which are not specifically limited in the embodiments of the present application.

Transceiver 103 may use any transceiver-like device for communicating with other devices or communication networks. The transceiver 103 includes a transmitter (transmitter, Tx) and a receiver (receiver, Rx). For example, in the embodiment of the present application, the sending device 103 sends an OTN container through the transmitter.

Output device 104 is in communication with processor 101 and may display information in a variety of ways. For example, the output device 304 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a cathode ray tube (cathode ray tube, CRT) display device, or a projector (projector), etc.

The input device 105 communicates with the processor 101 and can accept user input in various ways. For example, the input device 105 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The receiving device 200 includes at least one processor (in FIG. 4, it is illustrated by including a processor 201 as an example), and at least one transceiver (in FIG. 4, it is illustrated by an example of including a transceiver 203). In addition, the receiving device 200 may further include at least one network interface (in FIG. 4 , one network interface 204 is used as an example for illustration). Optionally, the receiving device 200 may further include at least one memory (in FIG. 4 , a memory 202 is included as an example for illustration). Wherein, the processor 201, the memory 202, the transceiver 203 and the network interface 204 are connected through communication lines. The network interface 204 is used to connect to the core network device through a link (such as an S1 interface), or connect to a network interface (not shown in FIG. 4 ) of other network devices through a wired or wireless link (such as an X2 interface). The embodiment of the application does not specifically limit this. In addition, for related descriptions of the processor 201, the memory 202, and the transceiver 203, reference may be made to the description of the processor 101, the memory 102, and the transceiver 103 in the sending device 100, and details are not repeated here.

Wherein, the memory 202 is used for storing computer-executed instructions for implementing the solution of the present application, and the execution is controlled by the processor 101 . Specifically, the processor 201 is configured to execute computer-executed instructions stored in the memory 202, so as to implement the communication method performed by the receiving device in the embodiment of the present application.

Or, optionally, in the embodiment of the present application, the processor 201 may also perform functions related to the receiving device in the communication method provided in the following embodiments of the present application, and the transceiver 203 is responsible for communicating with other devices or communication networks. The embodiment of the application does not specifically limit this.

Transceiver 203 may use any transceiver-like device for communicating with other devices or communication networks. The transceiver 203 includes a transmitter (transmitter, Tx) and a receiver (receiver, Rx). For example, in the embodiment of the present application, the receiving device 200 transmits an OTN container through the receiver.

It can be understood that the structure shown in FIG. 4 does not constitute a specific limitation on the sending device 100 or the receiving device 200 . For example, in some other embodiments of the present application, the sending device 100 or the receiving device 200 may include more or fewer components than shown in the figure, or combine some components, or split some components, or arrange different components. The illustrated components can be realized in hardware, software or a combination of software and hardware. In addition, in some scenarios, the sending device 100 can also be used as a receiving device, and the receiving device 200 can also be used as a sending device.

The following will describe the communication method provided by the embodiment of the present application by taking the uplink transmission of data sent by the sending device to the Ethernet shown in FIG. 3 as an example with reference to FIG. 1 to FIG. 5 .

S101. The sending device receives data code blocks and marker code blocks of multiple physical coding sublayer PCS channels.

Wherein, a PCS channel includes a plurality of marking code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marking code blocks. As described in Table 1 above, each PCS channel uses a marking code block for the PCS The number of the channel is numbered, that is, the multiple marked code blocks set at intervals in a PCS channel are the same, and the marked code blocks set in different PCS channels are different; the data code block carries the original data flow of the Ethernet service; in the specific implementation, Taking the data flow of the 100GE Ethernet service at the PCS layer as an example, it includes multiple code blocks encoded in 66-Bit atomic data blocks in 64/66Bit encoding, such as data code blocks and marker code blocks. Taking each PCS channel supporting 5G bandwidth granularity as an example, the 66Bit code blocks in the data stream of the PCS layer of the 100GE Ethernet service can be transmitted in 20 PCS channels, and the marked code blocks are used to align each PCS channel The data code block is used to carry the original data stream of the MAC layer.

Exemplarily, taking the 100GE Ethernet service as an example, the above-mentioned AM can be used for the marking code block, as shown in Figure 2 and Table 1. Since the encoding corresponding to each AM is different, taking the PCS channel of 5G bandwidth as an example, Then 20 PCS channels can be indicated. Specifically, after acquiring the Ethernet service, the sending end device allocates 20 PCS channels of 5G bandwidth to the Ethernet service according to the bandwidth occupied by the Ethernet service.

S102. The sending device inserts the Ethernet service identifier into the marker code blocks of multiple physical coding sublayer PCS channels.

In step S102, the Ethernet service identifier is used to indicate the Ethernet service carried by the data code block in the PCS channel where the marked code block is located; like this, the 20 PCS channels of 5G bandwidth in step S101 are used to carry the Ethernet service , insert the Ethernet service identifier of the Ethernet service into the marking code blocks in the 20 5G bandwidth PCS channels. For example, an Ethernet service identifier (specifically, a client identifier (Client ID, CID)) may be inserted into the BIP ₇ field of the AM. Specifically, referring to FIG. 6 , it shows the transmission sequence of each data code block in multiple PCS channels. For example, referring to Fig. 6, it is shown that among the 20 PCS channels (0-19) defined in IEEE 802.3, the data code blocks (66B) in each PCS channel are arranged according to the transmission order of the PCS channels, wherein in each PCS channel, there are 16383 data code blocks between every two adjacent AMs, as shown in Figure 6, there are 16383 data code blocks between AM1 and AM2. The black arrows in FIG. 6 show the transmission sequence of each data code block and AM. It should be noted that, when transmitting data code blocks in each PCS channel, each data code block may be scrambled according to different PCS channels. Wherein, AM is not scrambled because AM is used to align data code blocks in each PCS channel at the receiving end. It should be noted that, in Fig. 6, each PCS channel includes marker code blocks AM1 and AM2, and AM1 and AM2 in the same PCS channel are the same; AM1 and AM2 in different PCS channels are different, for example, PCS channel 1 AM1 and AM2 in PCS channel 1 are the same, but the position of insertion is different; in order to distinguish PCS channel 1 and PCS channel 2, AM1 and AM2 in PCS channel 1 are different from AM1 and AM2 in PCS channel 2.

In addition, taking the 200G/400GE Ethernet service as an example, in the G.709 protocol, the codeword identification ( code word marker, CWM, which identifies the code block) is replaced by a rate matching (rate compensation, RC) identification. Specifically, referring to FIG. 7 , the formats of RC0 and RC1 are shown, and their length and AM are both 66B. The positions of RC and AM in the PCS channel are the same and the content is different. Since the protocol needs to scramble the RC and the data code block according to the PCS channel where they are located, the RC code cannot directly distinguish the PCS channel. In the embodiment of this application 8, the number of the PCS channel can be inserted into bits [29:26] of RC0\RC1. Fill in the Ethernet service identifier in Bit [65:58] (for example, it may specifically be a client identifier (Client ID, CID)). Among them, each PCS channel of the 200GE Ethernet service supports the minimum particle bandwidth of 200/8=25G, then the 200GE Ethernet service has 8 pairs of RCs, and bits [29:26] in 8 different RC0/1 are respectively Fill in 0x0/0x1/0x2/0x3.../0x7 in sequence; each PCS channel of 400GE Ethernet supports the smallest particle that can be split into 400/16=25G. Then the 400GE Ethernet service has 16 pairs of RCs, and bits [29:26] in 16 different RC0/1 are respectively filled with 0x0/0x1/0x2/0x3.../0xf in sequence.

S103. The sending device maps the data code blocks and marker code blocks in multiple PCS lanes to an OTN container.

Exemplarily, the sending device may respectively combine sub-data streams carried by multiple PCS channels into one or more data streams. The sub-data flow includes the data code blocks in the PCS channel and the data queue formed by the marked code blocks. According to the configuration, the sub-data streams contained in one or more PCS channels can be freely combined into p data streams, and the sum of the bandwidth of each data stream n1, n2...np is equal to 100G. The bandwidths of the data streams in n1, n2...np can be the same or different. Exemplarily, as shown in FIG. 9, for any Ethernet service, the description is as follows in conjunction with the 66Bit code block shown in FIG. The identifier of the PCS channel, y identifies the position of the code block in the PCS channel (the yth 66-Bit code block). In this way, the data code blocks 0.0, 1.0, 2.0, 3.0, and the data code blocks 0.1, 1.1, 2.1, 3.1 of PCS channels 0-3 can be combined into n0 data streams, and then the n0 data streams can be loaded into the 20G bandwidth optical Transport network container; can combine data code blocks 4.0, 10.0, 11.0 and data code blocks 4.1, 10.1, 12.1 of

PCS channels

4, 10, and 11 into n1 data streams, and then load n1 data streams into 15G bandwidth Optical transport network container. Exemplarily, the optical transport network container includes an optical channel data unit k container or a flexible optical channel data unit container. In this step, bitmap (bitmap, BMP) is performed on the combined p data streams respectively, and loaded into the payload (payload) of the OTN container.

S104. The sending device sends each OTN container to the OTN.

In the above scheme, usually when the sending device receives data code blocks and mark code blocks of multiple physical coding sublayer PCS channels, each PCS channel includes a plurality of mark code blocks set at intervals, and between adjacent mark code blocks It includes multiple data code blocks used to carry the original data stream. In this solution, since the sending device directly inserts the Ethernet service identifier into the marking code blocks of the multiple physical coding sublayer PCS channels of the Ethernet service, it does not directly insert the Ethernet service identifier into the PCS channel Do other processing for the code blocks carried, and then map the data code blocks and marker code blocks in multiple PCS channels carried by multiple physical sub-layer PCS channels to an optical transport network container, for example, multiple physical sub-layer The sub-data streams carried by the PCS channel are respectively combined into one or more data streams, and the sub-data streams include the data code blocks in the PCS channel and the data queue formed by the marked code blocks; each data stream can include at least one physical sub-layer PCS channel The sub-data flows carried by the sub-flows are then mapped to an optical transport network container with matching bandwidth and sent to the optical transport network. In this way, since the PCS channel itself has an identification code block for data block alignment, due to Each identification code block corresponds to a PCS channel, and in the solution of this application, the identification code block also carries the Ethernet service identifier used to indicate the Ethernet service carried by the data code block in the PCS channel where the marking code block is located, Therefore, after receiving the optical transport network container transmitted by the optical transport network, the receiving device can align the data code blocks of each PCS channel according to the identification code block, and according to the PCS channel corresponding to the identification code block and the carried Ethernet service identifier, The data code blocks in the PCS channels corresponding to the same Ethernet service identifier are combined to restore the original data stream. In this way, since there is no need to additionally insert control code blocks between multiple data code blocks of the PCS channel, bandwidth occupation is avoided. In addition, since there is no need to insert additional control code blocks, there will be no time slot overhead for the PCS channel, so that it can be directly compatible with the current Ethernet communication method. In addition, the solution provided by the embodiments of the present application is the PCS channel. The code blocks are directly encapsulated into the optical transport network container according to the original rate. Since no control code blocks are added between the divided code blocks, the transmission rate will not be changed, so clock transparent transmission can be supported.

The communication method provided by the embodiment of the present application will be described below with reference to FIG. 1 to FIG. 4 and FIG. 10 , taking the downlink transmission of data received by the receiving device shown in FIG. 3 from the Ethernet as an example.

S201. The receiving device respectively demaps data code blocks and marker code blocks in multiple PCS channels from multiple optical transport network containers transmitted in the optical transport network.

Specifically, the receiving device can demap p ODUFlexes to obtain p data streams. Since the marked code block contains the Ethernet service identifier, the Ethernet service identifier is used to indicate the Ethernet service carried by the data code block in the PCS channel where the marked code block is located. In this way, the receiving device obtains the sub-data stream carried by each PCS channel according to the marked code block in the p-data stream. Specifically, in step S201, the receiving device may split each data stream into data stream bandwidth BW/5 parts according to the data stream bandwidth (bandwidt, BW) according to the 66-bit granularity. If the sum of the bandwidths of the p data streams n1, n2...np is equal to 100G, after splitting all the p data streams, sub-data streams of all 20 PCS channels can be obtained. The sub-data flow includes the data code blocks in the PCS channel and the data queue formed by the marked code blocks.

S202. The receiving device recovers the original data stream of the Ethernet service from the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located.

Since the data code block of each PCS channel is scrambled in step S101, the data code block needs to be descrambled before step S202. When the AM block is used, the marked code block is not descrambled; in the 200G/400GE Ethernet service scenario, when the marked code block uses RC, the marked code block needs to be descrambled at the same time. Then align the data code blocks contained in the sub-data streams of each PCS channel according to the marked code blocks, and finally recombine and merge the data code blocks in each PCS channel to obtain the original data code stream. 64/66Bit decoding is performed on the data code block.

For example, as shown in FIG. 11 , for the data code blocks 0.0, 1.0, 2.0, 3.0, 0.1, 1.1, 2.1, and 3.1 contained in the data stream n0, the sub-data streams carried by each PCS channel are sequentially obtained according to the identification of the PCS channel, Then get data code blocks 0.0,0.1 in PCS channel 0, data code blocks 1.0,1.1 in PCS channel 1; data code blocks 2.0,2.1 in PCS channel 2, data code blocks 3.0,3.1 in PCS channel 3; For the data code blocks 4.0, 11.0, 12.0, 4.1, 11.1, and 12.1 contained in the data stream n1, the sub-data streams carried by each PCS channel are sequentially obtained according to the identification of the PSC channel, and the data code block 11.0 in the PCS channel 11 is obtained, 11.1, data code blocks 12.0, 12.1 in PCS channel 12; then merge the data code blocks of each PCS channel to obtain the first data code block 0.0, 1.0, 2.0, 3.0, 4.0, 11.0 of each PCS channel of the Ethernet service , 12.0, to obtain the second data code block 0.1, 1.1, 2.1, 3.1, 4.1, 11.1, 12.1 of each PCS channel of the Ethernet service.

In the solution of this application, since each identification code block corresponds to a PCS channel and carries the flexible Ethernet service identification, after receiving the OTN container transmitted by the optical transport network, the receiving device can use the identification code block to The data code blocks of each PCS channel are aligned, and according to the PCS channel corresponding to the identification code block and the flexible Ethernet service identifier carried, the data code blocks in the PCS channel corresponding to the same flexible Ethernet service identifier are combined to restore the original data flow. In this way, since there is no need to additionally insert control code blocks between multiple data code blocks of the PCS channel, bandwidth occupation is avoided. In addition, since there is no need to insert additional control code blocks, there will be no time slot overhead for the PCS channel, so that it can be directly compatible with the current Ethernet communication method. In addition, the solution provided by the embodiments of the present application is the PCS channel. The code blocks are directly encapsulated into the optical transport network container according to the original rate. Since no control code blocks are added between the divided code blocks, the transmission rate will not be changed, so clock transparent transmission can be supported.

It can be understood that, in order to realize the above-mentioned functions, the above-mentioned network devices and terminal devices include corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that, in combination with the units and algorithm operations of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

The embodiment of the present application may divide the network device into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

For example, in the case of dividing various functional modules in an integrated manner, FIG. 12 shows a schematic structural diagram of a sending device. The sending device may be a chip or a system-on-a-chip in the sending device, or other combined devices, components, etc. that can realize the functions of the sending device above, and the sending device may be used to perform the functions of the sending device involved in the above embodiments.

As a possible implementation manner, the sending device shown in FIG. 12 includes: a processing unit 1201 , a sending unit 1202 , and a receiving unit 1203 . The receiving unit 1203 is configured to receive data code blocks and marker code blocks of a plurality of physical coding sublayer PCS channels; the processing unit 1201 is configured to insert Ethernet services into the marker code blocks of the multiple physical coding sublayer PCS channels identification, the Ethernet service identification is used to indicate the Ethernet service carried by the data code block in the PCS channel where the mark code block is located; the data code block and the mark code block in the multiple PCS channels The block is mapped to an OTN container; the sending unit 1202 is configured to send each OTN container to the OTN.

In a possible implementation manner, the codeword mark includes an alignment identifier AM, and the Ethernet service identifier is set in a BIP ₇ field of the AM.

In a possible implementation, the codeword mark includes a rate matching RC identifier, the identifier of the physical coding sublayer channel is carried in the bits [29:26] of the rate matching RC identifier, and the Ethernet service identifier is carried in the bits [29:26] of the RC identifier 65:58].

In a possible implementation, a PCS channel includes a plurality of marked code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marked code blocks, and each PCS channel corresponds to a marked code block; the data code The block carries the original data stream of the Ethernet service.

In a possible implementation manner, the mark code block and the data code block are 66-Bit code blocks formed in a 64/66-Bit encoding manner.

In a possible implementation manner, in a physical coding sublayer channel, there are 16383 data code blocks between two adjacent marker code blocks.

Wherein, all relevant content of each operation involved in the above method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.

In this embodiment, the sending device is presented in a form of dividing various functional modules in an integrated manner. A "module" here may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions. In a simple embodiment, those skilled in the art can imagine that the sending device may take the form of the sending device shown in FIG. 4 .

For example, the processor 101 in FIG. 4 may invoke the computer-executed instructions stored in the memory 103, so that the sending device executes the method for communication in the foregoing method embodiments.

Exemplarily, the functions/implementation process of the receiving unit 1203, the sending unit 1202, and the processing unit 1201 in FIG. 12 can be implemented by the processor 101 in FIG. The function/implementation process of the processing unit 1201 can be realized by the processor 101 in FIG. 4 calling the computer execution instructions stored in the memory 103, and the function/implementation process of the sending unit 1202 in FIG. 103 in the transmitter to achieve. The function/implementation process of the receiving unit 1203 in FIG. 12 may be implemented by the receiver in the transceiver 103 in FIG. 4 .

Since the communication device provided in this embodiment can execute the above-mentioned communication method, the technical effect it can obtain can refer to the above-mentioned method embodiment, which will not be repeated here.

The embodiments of the present application may divide the receiving device into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

For example, in the case of dividing various functional modules in an integrated manner, FIG. 13 shows a schematic structural diagram of a receiving device. The receiving device may be a chip or a system-on-a-chip in the above receiving device, or other combination devices, components, etc. that can realize the functions of the above receiving device, and the receiving device may be used to perform the functions of the receiving device involved in the above embodiments.

As a possible implementation manner, the receiving device shown in FIG. 13 includes: a receiving unit 1301 and a processing unit 1302 . The receiving unit 1301 is configured to receive multiple optical transport network containers transmitted in the optical transport network; the processing unit 1302 is configured to respectively demap multiple PCS channels from the multiple optical transport network containers transmitted in the optical transport network A data code block and a marked code block, the marked code block contains an Ethernet service identifier, and the Ethernet service identifier is used to indicate the data code block carried by the data code block in the PCS channel where the marked code block is located Ethernet service: restore the original data flow of the Ethernet service to the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located.

In a possible implementation manner, the codeword mark includes a rate matching RC identifier, the identifier of the physical coding sublayer channel is carried in bits [29:26] of the rate matching RC identifier, and the Ethernet service The flag is carried in bits [65:58] of the rate matching RC flag.

In a possible implementation manner, one PCS channel includes a plurality of marker code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marker code blocks, and each PCS channel corresponds to a The tag code block; the data code block bears the original data flow of the Ethernet service.

In a possible implementation manner, the data code block includes a 66Bit code block; the processing unit 1302 is specifically configured to convert the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located After being decoded in a 64/66Bit decoding manner, it is combined into the original data stream of the Ethernet service.

In a possible implementation manner, in one physical coding sublayer channel, there are 16383 data code blocks between two adjacent marker code blocks.

In this embodiment, the receiving device is presented in a form of dividing various functional modules in an integrated manner. A "module" here may refer to a specific ASIC, a circuit, a processor and a memory executing one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the above-mentioned functions. In a simple embodiment, those skilled in the art can imagine that the receiving device can take the form of the receiving device shown in FIG. 4 .

For example, the processor 201 in FIG. 4 may invoke the computer-executed instructions stored in the memory 203, so that the receiving device executes the communication method in the foregoing method embodiments.

Exemplarily, the functions/implementation process of the receiving unit 1301 and the processing unit 1302 in FIG. 13 can be realized by calling the computer execution instructions stored in the memory 203 by the processor 201 in FIG. 4; or, the processing unit 1302 in FIG. 13 The function/implementation process can be realized by the processor 201 in FIG. 4 calling the computer execution instructions stored in the memory 203, and the function/implementation process of the receiving unit 1301 in FIG. 13 can be realized by the receiver of the transceiver 203 in FIG. 4 to fulfill.

Since the receiving device provided in this embodiment can execute the above-mentioned communication method, the technical effect it can obtain can refer to the above-mentioned method embodiment, and details are not repeated here.

Optionally, the embodiment of the present application also provides a communication device (for example, the communication device may be a chip or a chip system), the communication device includes a processor and an interface, and the processor is used to read instructions to perform any of the above methods Methods in the Examples. In a possible design, the communication device further includes a memory. The memory is used to store necessary program instructions and data, and the processor can call the program code stored in the memory to instruct the communication device to execute the method in any one of the above method embodiments. Of course, the memory may not be in the communication device. When the communication device is a system-on-a-chip, it may be composed of a chip, or may include a chip and other discrete devices, which is not specifically limited in this embodiment of the present application.

Specifically, when the communication device is a sending device, the sending unit 1202 may be a transmitter when transmitting information; when the communication device is a receiving device, the receiving unit 1301 may be a receiver when receiving information; The machine may be a radio frequency circuit. When the communication device includes a storage unit, the storage unit is used to store computer instructions, the processor is connected to the memory in communication, and the processor executes the computer instructions stored in the memory, so that the communication device executes the method involved in the method embodiment. Wherein, the processor may be a general central processing unit (CPU), a microprocessor, or an application specific integrated circuit (ASIC).

When the communication device is a chip, the sending unit 1202 and the receiving unit 1301 may be input and/or output interfaces, pins or circuits, and the like. The processing unit 1201 and the processing unit 1302 can execute the computer-executed instructions stored in the storage unit, so that the chip in the communication device executes the method involved in the method embodiment. Optionally, the storage unit is a storage unit in the chip, such as a register, a cache, etc., and the storage unit may also be a storage unit located outside the chip in the terminal device or network device, such as only Read only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or may be a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (solid state disk, SSD)), etc. In the embodiment of the present application, the computer may include the aforementioned apparatus.

Although the present application has been described in conjunction with various embodiments here, however, in the process of implementing the claimed application, those skilled in the art can understand and Other variations of the disclosed embodiments are implemented. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that these measures cannot be combined to advantage.

Although the application has been described in conjunction with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely illustrative of the application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of this application. Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

A communication method, characterized in that, comprising:

The sending device receives data code blocks and marker code blocks of multiple physical coding sublayer PCS channels;

The sending device inserts an Ethernet service identifier into the marker code blocks of the plurality of physical coding sublayer PCS channels, and the Ethernet service identifier is used to indicate the PCS channel in which the marker code block is located. Ethernet services carried by data code blocks;

The sending device maps the data code blocks and marker code blocks in the multiple PCS channels to an optical transport network container;

The sending device sends the OTN container to the OTN.
The communication method according to claim 1, wherein the tag code block includes an alignment identifier AM, and the Ethernet service identifier is set in the BIP 7 field of the AM.
The communication method according to claim 1, wherein the marked code block includes a rate matching RC identifier, and the identifier of the physical coding sublayer PCS channel is carried in bits [29:26] of the RC identifier, so The Ethernet service identifier is carried in bits [65:58] of the RC identifier.
The communication method according to any one of claims 1-3, wherein one PCS channel includes a plurality of marker code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marker code blocks , each of the PCS channels corresponds to one type of the tag code block; the data code block bears the original data stream of the Ethernet service.
The communication method according to any one of claims 1-4, wherein the mark code block and the data code block are 66Bit code blocks formed by adopting a 64/66Bit encoding method.
The communication method according to any one of claims 1-5, characterized in that, in one PCS channel, there are 16383 data code blocks between two adjacent marker code blocks.
A communication method, characterized in that, comprising:

The receiving device respectively demaps data code blocks and marked code blocks in multiple PCS channels in multiple optical transport network containers transmitted in the optical transport network, the marked code blocks contain Ethernet service identifiers, and the Ethernet The service identifier is used to indicate the Ethernet service carried by the data code block in the PCS channel where the marker code block is located;

The receiving device recovers the original data stream of the Ethernet service from the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located.
The communication method according to claim 7, wherein the tag code block includes an alignment identifier AM, and the Ethernet service identifier is set in the BIP 7 field of the AM.
The communication method according to claim 7, wherein the tag code block includes a rate-matching RC identifier, and the identifier of the PCS channel is carried in bits [29:26] of the rate-matching RC identifier, and the Ethernet The network service identifier is carried in bits [65:58] of the rate matching RC identifier.
The communication method according to any one of claims 7-9, wherein one PCS channel includes a plurality of marker code blocks arranged at intervals, and a plurality of data code blocks are included between adjacent marker code blocks , each of the PCS channels corresponds to one type of the tag code block; the data code block bears the original data stream of the Ethernet service.
The communication method according to any one of claims 7-10, wherein the data code block includes a 66Bit code block; The data code block in the PCS channel restores the original data flow of the Ethernet service, including: converting the data code block in the PCS channel where the marked code block with the same Ethernet service identifier is located to 64/ After being decoded in a 66Bit decoding mode, the original data stream of the Ethernet service is combined.
The communication method according to any one of claims 7-11, characterized in that, in one PCS channel, there are 16383 data code blocks between two adjacent marker code blocks.
A sending device, characterized in that it includes:

a receiver, configured to receive data code blocks and marker code blocks of multiple physical coding sublayer PCS channels;

A processor, configured to insert an Ethernet service identifier into the marker code blocks of the plurality of physical coding sublayer PCS channels, where the Ethernet service identifier is used to indicate all of the PCS channels in which the marker code block is located The Ethernet service carried by the data code block; the data code block and the mark code block in the multiple PCS channels are mapped to an optical transport network container;

A transmitter, configured to send the OTN container to the OTN.
A receiving device, characterized in that it comprises:

a receiver for receiving a plurality of optical transport network containers transmitted in the optical transport network;

The processor is configured to respectively demap data code blocks and mark code blocks in multiple PCS channels in multiple optical transport network containers transmitted in the optical transport network, and the mark code blocks contain Ethernet service identifiers, so The Ethernet service identifier is used to indicate the Ethernet service carried by the data code block in the PCS channel where the marked code block is located; the PCS where the marked code block with the same Ethernet service identifier is located The data code blocks in the channel restore the original data flow of the Ethernet service.
A computer-readable storage medium, characterized by being used to store a computer program, the computer program including instructions for executing the communication method according to any one of claims 1-12.
A computer program product, characterized in that the computer program product comprises: computer program code, when the computer program code is run on a computer, the computer is made to execute the computer according to any one of claims 1-12. communication method.