WO2020034954A1 - Procédé et appareil de transmission d'en-tete de mappage, procédé et appareil de réception d'en-tete de mappage, dispositif otn et support d'enregistrement - Google Patents

Procédé et appareil de transmission d'en-tete de mappage, procédé et appareil de réception d'en-tete de mappage, dispositif otn et support d'enregistrement Download PDF

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Publication number
WO2020034954A1
WO2020034954A1 PCT/CN2019/100411 CN2019100411W WO2020034954A1 WO 2020034954 A1 WO2020034954 A1 WO 2020034954A1 CN 2019100411 W CN2019100411 W CN 2019100411W WO 2020034954 A1 WO2020034954 A1 WO 2020034954A1
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mapping
overhead
service signal
signal frame
payload area
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PCT/CN2019/100411
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English (en)
Chinese (zh)
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张源斌
苑岩
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]

Definitions

  • the present application relates to the field of communications, and in particular, to a method and device for transmitting and receiving mapping overhead, an OTN device, and a storage medium.
  • OTN Optical Transport Network
  • ITU-T International Telecommunication Union
  • ITU-T Union-Telecommunication Standardization Sector
  • the customer service data is mapped to obtain the OTN interface frame.
  • the amount of customer service data reflected in the form of mapping overhead is stored in the overhead portion of the service signal frame of the OTN interface frame.
  • the service signal frame The proportion coefficient of the payload portion of the service signal frame is at a high ratio, which can meet the need for storing the mapping overhead in the overhead portion of the service signal frame, and this proportion coefficient may be adjusted in the future to achieve the goal of reducing the line interface rate. ,
  • the proportion of the overhead portion of the service signal frame will decrease. At this time, the bandwidth resources of the overhead portion will shrink, and the mapping overhead cannot be stored in the overhead portion of the service signal frame due to insufficient bandwidth resources.
  • the method, device, OTN equipment and storage medium for transmitting and receiving mapping overhead provided by the embodiments of the present invention solve the related art to reduce the proportion of the overhead portion of the service signal frame in order to reduce the line interface rate. Problems that cannot be stored in the overhead portion of the service signal frame.
  • An embodiment of the present invention provides a mapping overhead transmission method, including:
  • mapping overhead of the general mapping procedure into the payload area of the service signal frame
  • the optical transmission network interface frame is transmitted out.
  • An embodiment of the present invention further provides a method for receiving a mapping overhead, including:
  • An embodiment of the present invention further provides a mapping overhead transmission device, including:
  • a mapping module configured to map an optical channel data unit to a service signal frame payload area of an optical transmission network interface frame according to a general mapping procedure
  • a filling module configured to fill a mapping overhead of a common mapping procedure into a service signal frame payload area
  • a transmission module for transmitting an optical transmission network interface frame.
  • An embodiment of the present invention further provides a mapping overhead receiving apparatus, including:
  • a receiving module for receiving an optical transmission network interface frame
  • An obtaining module configured to obtain a mapping overhead of a common mapping procedure from a service signal frame payload area of an optical transport network interface frame
  • the demapping module is configured to perform a demapping process according to a general mapping procedure.
  • An embodiment of the present invention further provides an optical transmission network device.
  • the optical transmission network device includes a processor, a memory, and a communication bus.
  • the communication bus is used to implement connection and communication between the processor and the memory
  • the processor is configured to execute one or more programs stored in the memory to implement the steps of the mapping overhead transmission method according to any one of the above items, or the steps of the mapping overhead receiving method according to any one of the above items.
  • An embodiment of the present invention further provides a computer-readable storage medium.
  • the computer-readable storage medium stores one or more programs, and the one or more programs can be executed by one or more processors, so as to implement any one of the foregoing. Steps of the mapping overhead transmission method, or the steps of the mapping overhead receiving method as described above.
  • Embodiments of the present invention provide a method, an apparatus, an OTN device, and a storage medium for mapping overhead transmission.
  • a general mapping procedure an optical channel data unit is mapped to a service signal frame payload area of an optical transmission network interface frame.
  • the mapping overhead of the mapping procedure is filled into the service signal frame payload area; the optical transmission network interface frame is transmitted out. Therefore, in the case of reducing the proportion of the overhead portion of the service signal frame in the future, it is possible to ensure that the mapping overhead is stored in the service signal frame and ensure the smooth transmission of services.
  • FIG. 1 is a flowchart of a mapping overhead transmission method provided in Embodiment 1 of this application;
  • FIG. 2 is a schematic structural diagram of an OTN interface frame provided in Embodiment 1 of the present application.
  • FIG. 3 is a schematic structural diagram of a service signal frame provided in Embodiment 1 of the present application.
  • FIG. 5 is a schematic diagram of a service transmission scenario provided in Embodiment 3 of the present application.
  • FIG. 6 is a flowchart of a method for interacting with customer service data provided in Embodiment 3 of the present application;
  • FIG. 7 is a schematic structural diagram of an OTN interface frame provided in Embodiment 3 of the present application.
  • FIG. 8 is a schematic structural diagram of a service signal frame provided in Embodiment 3 of the present application.
  • FIG. 9 is a schematic structural diagram of a communication system provided in Embodiment 4 of the present application.
  • FIG. 10 is a schematic structural diagram of a mapping overhead transmission device provided in Embodiment 4 of the present application.
  • FIG. 11 is a schematic structural diagram of a mapping overhead receiving apparatus provided in Embodiment 4 of the present application.
  • FIG. 12 is a schematic structural diagram of an optical transmission network device provided in Embodiment 5 of the present application.
  • low-speed ODUi (i ⁇ k) signals are used to indicate ODUi signals that are lower than the ODUk rate; non-OTN signals refer to signals other than optical transmission network signals.
  • Various other signals such as Synchronous Digital Hierarchy (SDH), Ethernet (Ethernet), Fibre Channel, and various Packet signals.
  • the signal of the optical transmission network includes two parts of overhead and payload.
  • the following uses OTUk as an example to further explain the components of the signal of the optical transmission network.
  • the OTUk signal consists of OTUk.
  • the remaining part after removing the OTUk overhead in OTUk is called the optical channel data unit ODUk.
  • the remaining part after removing the ODUk overhead in ODUk is called the optical channel payload unit OPUk (Optical Channel Payload Unit-k).
  • the remaining part of the OPUk after removing the OPUk overhead is called the OPUk payload.
  • the OPUk payload can be used to carry a non-OTN signal or multiple low-speed ODUi (i ⁇ k) signals.
  • a signal composed of ODUk is called an ODUk signal.
  • mapping methods used for loading non-OTN signals into the OPUk payload include asynchronous mapping procedures (AMP, Asynchronous Mapping Procedure), bit synchronization mapping procedures (BMP, Bit-synchronous Mapping Procedure), and general mapping procedures (GMP, Generic Mapping Procedure)
  • AMP Asynchronous Mapping Procedure
  • BMP Bit-synchronous Mapping Procedure
  • GMP Generic Mapping Procedure
  • OTUk and non-OTN signal rates are required to be completely synchronized and the rate ratio meets a specific relationship
  • AMP and GMP do not require OTUk and non-OTN signal rates to be synchronized, especially GMP, which is a non-OTN signal
  • the optical transmission network signal definition in the related art stipulates that various packet signals are mapped into the ODUflex (GFP) through the Universal Framing Procedure (GFP-F, Frame Framing Procedure) mapping, and then Loaded into the time slot of the OPUk.
  • GFP ODUflex
  • GTP-F Universal Framing Procedure
  • the mapping overhead of GMP needs to occupy 6 bytes. These 6 bytes are stored in the overhead part of the OPU.
  • the ratio coefficient of ODU and ODU payload is 239/238, and the overhead ratio is about 0.4% .
  • this scaling factor may be adjusted in the future to achieve the goal of reducing the line interface rate, so that the proportion of the overhead part will be reduced, at this time the bandwidth resources of the overhead part will shrink, and the GMP mapping
  • the overhead occupies 6 bytes. There may be situations where the bandwidth is insufficient and the mapping overhead cannot be stored.
  • mapping overhead transmission device please refer to the flowchart of the mapping overhead transmission method shown in FIG. 1:
  • S101 Map the optical channel data unit to the service signal frame payload area of the optical transmission network interface frame according to the general mapping procedure.
  • the customer service data is first mapped to the optical channel payload unit OPUk, and the overhead of the OPUk constitutes the OPUk. Then, the OPUk and the channel overhead of the optical channel data unit ODUk form the ODUk.
  • the client service data that is accessed is also mapped and mapped to ODUk.
  • the payload area of the service signal frame may consist of data blocks (data entities). The data blocks include padding data blocks and service data blocks, and then The ODUk is then mapped to the service data block in the payload area of the service signal frame of the optical transport network interface frame, so as to be suitable for transmission.
  • a universal mapping procedure mapping method is used to map the ODUk to the service signal frame payload area of the optical transport network interface frame.
  • GMP mapping is more flexible and convenient, and supports ODUflex.
  • the ODUflex still maintains the original ODU structure and can carry customer service data of constant bit rate (CBR, Constant Bit Rate) at any rate.
  • CBR Constant Bit Rate
  • optical transmission network interface frame may be constructed based on a fixed format PCS code block, and the size of the data block is M times the PCS code block, and M is an integer greater than or equal to 1.
  • the data block of the OTN interface frame in this embodiment is constructed using a data format based on a PCS (Physical Coding Sublayer) coding block (for example, a 66b block), and a single PCS code is used between each time slot
  • the block interleaving method is shown in the structure diagram of the OTN interface frame provided in this embodiment as shown in FIG. 2.
  • the overhead of inserting (KJ) PCS-based coding blocks every J PCS coding blocks is used to carry the corresponding path monitoring.
  • Information, group management overhead, etc., the J PCS code blocks form the payload area of the OTN interface frame.
  • the size of the service data block used is M times the PCS coded block, and M is a positive integer greater than or equal to 1.
  • S102 Fill the mapping overhead of the general mapping procedure into the payload area of the service signal frame.
  • mapping overhead in a fixed number of service signal frame periods, the amount of customer service data to be transmitted is expressed in the form of mapping overhead.
  • mapping overhead in practical applications, in order to reduce the algorithm burden of the mapping overhead, multiple settings can be set. Each service signal frame period is used to calculate the mapping overhead.
  • the bandwidth of the service signal frame is greater than the bandwidth of the customer's business data
  • a certain number of data blocks will remain, so the overhead will be mapped in this embodiment. Fill in the remaining data blocks, that is, fill the data blocks.
  • the "sigma-delta" algorithm is used to calculate the payload area of the customer service data in the service signal frame. Distribution pattern in the, then the positions corresponding to the customer business data blocks where these quantities of customer business data are stored can be determined.
  • the mapping overhead of the general mapping procedure is filled into one or more padding data blocks in the payload area of the service signal frame. Specifically, if the data block of the payload area is constructed based on the PCS coding block, only one data block is needed to store the mapping overhead, and if the data block of the payload area is constructed based on bytes, then one or Multiple padding data blocks are used to store the mapping overhead.
  • the mapping overhead of the optical channel data unit in the service signal frame can be filled into the first filling data block of the service signal frame payload area.
  • the service signal frame is composed of multiple data blocks, and the first data block is not used to store customer business data, that is, it can be used to fill the mapping overhead, that is, to fill the data block in the figure, so It can effectively avoid the algorithm burden caused when the mapping overhead is filled in data blocks in other locations, and the rest are business data blocks used to fill customer business data, as well as those that are neither filled in customer business data nor used to fill mapping overhead. Free data blocks.
  • the mapping overhead of the general mapping procedure is filled to the first N padding data blocks of the payload area of the service signal frame. In the region, N takes an integer greater than 1.
  • the size of the mapping overhead is at least 6 bytes, and the size of a single PCS encoding block is 8 bytes, so the size of a data block is M * 8 bytes, so that Allows mapping overhead to be filled into fillable data blocks other than service data blocks to meet the transmission needs of mapping overhead.
  • filling the mapping overhead of the universal mapping procedure into the payload area of the service signal frame may specifically include filling the mapping overhead of the universal mapping procedure into the payload of the service signal frame after performing a check process and / or a forward error correction coding process. Area.
  • each mapping overhead can be checked or forward error correction code (Forward Error Correction (FEC)) encoding, the check bit size is at least 16 bits, and then the calibration The parity bit can be stored in the remaining bytes of the padding data block with mapping overhead.
  • FEC Forward Error Correction
  • the optical channel data unit is mapped to the service signal frame payload area of the optical transmission network interface frame by following the general mapping procedure; the mapping overhead of the general mapping procedure is filled into the service signal. Frame payload area; transmits frames of the optical transport network interface. Therefore, in the case of reducing the proportion of the overhead portion of the service signal frame in the future, it is possible to ensure that the mapping overhead is stored in the service signal frame and ensure the smooth transmission of services.
  • This embodiment also provides a mapping overhead transmission method, which is applied to a mapping overhead receiving apparatus.
  • a mapping overhead transmission method which is applied to a mapping overhead receiving apparatus.
  • S401 Receive an optical transmission network interface frame.
  • the payload area of the service signal frame may be composed of a data block (data entity), and the data block includes a fill data block and a service data block; wherein the service data block is used to store an optical channel Data unit, which is used to store the mapping overhead in the filled data block.
  • the optical transport network interface frame can be constructed based on a fixed format PCS (Physical Coding Sublayer) coding block. A single PCS is used between each time slot. The interleaving mode of the coding block. The size of the data block is M times that of the PCS coding block, and M is an integer greater than or equal to 1.
  • PCS Physical Coding Sublayer
  • a general mapping procedure mapping method is used to perform demapping processing on the optical transport network interface frame.
  • GMP mapping is more flexible and convenient, and supports ODUflex.
  • the ODUflex still maintains the original ODU structure and can carry customer service data of constant bit rate (CBR, Constant Bit Rate) at any rate.
  • CBR Constant Bit Rate
  • mapping overhead In this embodiment, within a fixed number of service signal frame periods, the amount of customer service data received is expressed in the form of mapping overhead. In practical applications, in order to reduce the algorithm burden of the mapping overhead, multiple Serving the signal frame period to perform a mapping overhead calculation.
  • the method further includes: performing a check processing and / or a forward error correction decoding processing on the mapping overhead.
  • Each mapping overhead in the received OTN interface frame is the mapping overhead after verification or FEC encoding, that is, the remaining bytes of the padding block storing the mapping overhead are also filled with check bits.
  • Check processing and / or FEC decoding processing should be performed on the mapping overhead in the received OTN interface frame.
  • a mapping overhead of a general mapping procedure is obtained from one or more stuffing data blocks in a service signal frame payload area of an optical transport network interface frame. Specifically, if the data block of the payload area is constructed based on the PCS coding block, only one padding data block is needed to store the mapping overhead, and if the data block of the payload area is constructed based on bytes, then one or The entire area composed of multiple data blocks is used to store the mapping overhead.
  • the mapping overhead in the received OTN interface frame can be filled in the first padding data block in the payload area of the service signal frame.
  • the service signal frame of the optical transmission network interface frame needs to be netted.
  • the mapping overhead is obtained from an area composed of the first N padding data blocks of the payload area of the service signal frame. N takes an integer greater than 1.
  • the service signal frame is composed of multiple data blocks, and the area formed by the first data block or the first N data blocks is not used to store customer business data, that is, it can be used to fill the mapping overhead, which can effectively avoid Algorithm burden caused by mapping overhead filled in data blocks in other locations.
  • S403 Perform demapping processing according to a general mapping procedure.
  • a “sigma-delta” algorithm is used to calculate the distribution pattern of the customer service data in the payload area of the service signal frame based on the indicated amount of customer service data. These quantities of customer business data are then extracted from the business data blocks at the locations corresponding to the distribution pattern.
  • the optical transmission network interface frame is received; the mapping overhead of the general mapping procedure is obtained from the service signal frame payload area of the optical transmission network interface frame; and the demapping processing is performed according to the general mapping procedure. . Therefore, in the case of reducing the proportion of the overhead portion of the service signal frame in the future, it is possible to ensure that the mapping overhead is obtained from the service signal frame and ensure the smooth reception of services.
  • FIG. 5 is a schematic diagram of a service transmission scenario provided by this embodiment. This embodiment is described in Embodiment 1. Based on the sum of two, the processing method of mapping overhead is introduced:
  • a flowchart of a method for interacting with customer service data provided in this embodiment is applied to a communication system including a mapping overhead transmitting device and a mapping overhead receiving device.
  • the customer service data interaction method includes:
  • the mapping overhead transmitting device performs mapping processing on the accessed customer service data and maps it to the optical channel data unit.
  • the line interface in this embodiment can use the rate of 25GE
  • OTN interface frames can be constructed in a format based on PCS coding blocks, and the granularity of each time slot is 1.04G, thereby dividing the OTN interface frame
  • time slots as shown in FIG. 7, which is a schematic structural diagram of an OTN interface frame provided in this embodiment.
  • 10GE customer service data can be transmitted.
  • the 10GE customer service data is first restored to the PCS code block data format, and then 2 PCS code block overheads are inserted at every 476 PCS code blocks.
  • the ODU occupies 10 time slots, that is, 10 time slots of the OTN interface frame constitutes a service signal frame.
  • the mapping overhead transmission device acquires the mapping overhead of the optical channel data unit in at least one service signal frame period of the optical transmission network interface frame; the mapping overhead includes the amount of customer service data, and the optical transmission network interface frame is constructed based on the data block, and the data block includes Fill data blocks and business data blocks.
  • the service signal frame payload area may be composed of data blocks (data entities), and the data blocks include a padding data block and a service data block.
  • the number of PCS coded blocks Cn of the transmitted ODU can be counted within one service signal frame period, and Cn can be converted into a representation form of mapping overhead. Cn can be an integer or a decimal.
  • the data block of the OTN interface frame in this embodiment may be constructed using a data format based on a PCS (Physical Coding Sublayer) coding block (for example, a 66b block), and a single PCS coding block is used between each time slot.
  • the size of the data block is M times that of the PCS code block, and M is an integer greater than or equal to 1.
  • the mapping overhead transmitting device maps the optical channel data unit to a service data block in the payload area of the service signal frame according to a common mapping procedure, and fills the mapping overhead into one or more padding data blocks in the payload area of the service signal frame. .
  • the mapping overhead may be filled into the first 66b block of the payload area of the service signal frame. Specifically, as shown in FIG. 8, 66b filled data blocks in FIG.
  • 66b business data blocks represent data blocks filled with customer business data
  • 66b free data blocks represent neither filled The customer business data is not used to fill the data block of the mapping overhead
  • JC1, JC2, JC3, JC4, JC5, and JC6 are 66b blocks storing ODUs.
  • mapping overhead may also be subjected to check processing and / or forward error correction coding processing, thereby improving the accuracy of the mapping overhead transmission.
  • mapping overhead transmitting device transmits the optical transmission network interface frame.
  • mapping overhead receiving device receives the optical transmission network interface frame transmitted by the mapping overhead transmitting device.
  • the mapping overhead receiving device obtains the mapping overhead of the optical channel data unit in at least one service signal frame period from the padding data block in the service signal frame payload area of the optical transmission network interface frame.
  • the mapping overhead receiving device performs demapping processing according to a general mapping procedure, and determines the position of the service data block of the optical channel data unit to which the customer service data is mapped in the service signal frame payload area according to the mapping overhead.
  • the mapping overhead receiving device needs to verify the mapping overhead in the received OTN interface frame. And / or FEC decoding.
  • the client service data sending device fills the mapping overhead in the first stuffing data block, the client service receiving device can directly obtain the mapping overhead from the first stuffing data block.
  • the mapping overhead receiving device acquires the service signal frame carrying the ODU according to the MSI information indication, extracts the mapping overhead from the first 66b block of the service signal frame, and parses out the corresponding amount of customer service data, and then According to the sigma-delta algorithm, the storage position of the 66b block of the ODU in the service signal frame is calculated.
  • the mapping overhead receiving device acquires customer service data based on the location of the service data block.
  • a customer service data sending device maps an optical channel data unit to a service data block in a service signal frame payload area of an optical transport network interface frame, and fills a mapping overhead into the service signal In the padding data block of the frame payload area, the mapping overhead receiving device obtains the mapping overhead from the corresponding location after receiving the optical transport network interface frame, and calculates the storage location of the customer's business data based on the mapping overhead, thereby extracting the customer Business data. Therefore, in the case of reducing the proportion of the overhead portion of the service signal frame in the future, it is possible to ensure that the mapping overhead is stored in the service signal frame and ensure the smooth interaction of services.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • FIG. 9 is a schematic structural diagram of a communication system according to this embodiment.
  • the communication system includes a mapping overhead transmitting device 100 and a mapping overhead receiving device 110.
  • the mapping overhead transmitting device 100 and the mapping overhead receiving device 110 are used to perform an OTN interface frame. Interaction.
  • FIG. 10 is a schematic structural diagram of a mapping overhead transmission device 100 according to this embodiment, including: a mapping module 1001, configured to map an optical channel data unit to an optical transmission network interface frame according to a general mapping procedure. Service signal frame payload area; a filling module 1002 for filling the mapping overhead of the general mapping procedure into the service signal frame payload area; and a transmission module 1003 for transmitting the optical transmission network interface frame.
  • a mapping module 1001 configured to map an optical channel data unit to an optical transmission network interface frame according to a general mapping procedure.
  • Service signal frame payload area Service signal frame payload area
  • a filling module 1002 for filling the mapping overhead of the general mapping procedure into the service signal frame payload area
  • a transmission module 1003 for transmitting the optical transmission network interface frame.
  • the mapping module 1001 uses a common mapping procedure mapping method to perform mapping processing on the ODUk to map to the service signal frame payload area of the optical transport network interface frame.
  • GMP mapping is more flexible and convenient, and supports ODUflex.
  • the ODUflex still maintains the original ODU structure and can carry customer service data of constant bit rate (CBR, Constant Bit Rate) at any rate.
  • CBR Constant Bit Rate
  • the payload area of the service signal frame may be composed of data blocks (data entities).
  • the data blocks include padding data blocks and service data blocks, and then the mapping module 1001 maps ODUk to the optical transport network interface.
  • the service signal frame of the frame is in a service data block in the payload area and is thus suitable for transmission.
  • the data block of the optical transmission network interface frame can be constructed based on a fixed format PCS (Physical Coding Sublayer) coding block (for example, 66b block), and a single PCS coding block interleaving method is used between each time slot. Is M times the size of the PCS code block, and M is an integer greater than or equal to 1.
  • PCS Physical Coding Sublayer
  • the amount of customer service data to be sent is expressed in the form of a mapping overhead. Because the bandwidth of the service signal frame is greater than the bandwidth of the customer's business data, in addition to the service data block that stores the customer's business data in the service signal frame, a certain number of data blocks will remain, so the module 1002 is filled in this embodiment.
  • the mapping overhead is filled in the remaining data blocks, that is, the data blocks are filled. It should be noted that after acquiring the mapping overhead in a fixed number of service signal frame periods, based on the indicated amount of customer service data, the "sigma-delta" algorithm is used to calculate the payload area of the customer service data in the service signal frame. Distribution pattern in the, then the positions corresponding to the customer business data blocks where these quantities of customer business data are stored can be determined.
  • the padding module 1002 can also be specifically used to perform the check processing and / or the forward error correction coding processing on the mapping overhead of the general mapping procedure, and then pad it to the service. Signal frame payload area.
  • the padding module 1002 is configured to pad the mapping overhead of the general mapping procedure into one or more padding data blocks in the payload area of the service signal frame. Specifically, if the data block of the payload area is constructed based on the PCS coding block, then only one padding data block is needed to store the mapping overhead, and if the data block of the payload area is constructed based on bytes, then one or Then multiple data blocks are filled to store the mapping overhead.
  • the filling module 1002 may fill the mapping overhead of the optical channel data unit in the service signal frame into the first filling data block in the payload area of the service signal frame.
  • the padding module 1002 pads the mapping overhead of the general mapping procedure to the first N padding data of the payload area of the service signal frame.
  • N is an integer greater than or equal to 1.
  • FIG. 11 is a schematic structural diagram of a mapping overhead receiving device 110 according to this embodiment, including: a receiving module 1101, configured to receive an optical transmission network interface frame.
  • the obtaining module 1102 is configured to obtain a mapping overhead of a general mapping procedure from a service signal frame payload area of an optical transport network interface frame.
  • the demapping module 1103 is configured to perform a demapping process according to a general mapping procedure.
  • the payload area of the service signal frame may be composed of a data block (data entity), and the data block includes a fill data block and a service data block; wherein the service data block is used to store an optical channel Data unit, which is used to store the mapping overhead in the filled data block.
  • the amount of customer service data is expressed in the form of mapping overhead.
  • the optical transport network interface frame can be constructed based on a fixed format PCS (Physical Coding Sublayer) coding block. A single PCS is used between each time slot. The interleaving mode of the coding block.
  • the size of the data block is M times that of the PCS coding block, and M is an integer greater than or equal to 1.
  • the client service data sending device checks or maps the mapping overhead of the OTN interface frame sent, correspondingly, it needs to check the mapping overhead of the received OTN interface frame and / Or FEC decoding process.
  • the obtaining module 1102 obtains a mapping overhead of a general mapping procedure from one or more padding data blocks in a service signal frame payload area of an optical transport network interface frame.
  • the mapping overhead in the received OTN interface frame can be filled in the first padding data block in the payload area of the service signal frame.
  • the acquisition module 1102 needs to receive the service from the optical transport network interface frame.
  • the first overhead data block in the payload area of the signal frame is used to obtain the mapping overhead of the optical channel data unit in at least one service signal frame period.
  • the obtaining module 1102 obtains from the area composed of the first N padding data blocks of the payload area of the service signal frame. Mapping overhead. N is an integer greater than or equal to 1.
  • the demapping module 1103 calculates the client service data in the payload area of the service signal frame by using the "sigma-delta" algorithm based on the indicated amount of customer service data And then extract these quantities of customer business data from the business data block at the location corresponding to the distribution pattern.
  • a mapping overhead transmitting device maps an optical channel data unit to a service signal frame payload area of an optical transmission network interface frame according to GMP, and fills a mapping overhead of a common mapping procedure to a service signal frame payload.
  • the optical transmission network interface frame is sent, and then the mapping overhead receiving device receives the mapping overhead from the corresponding position after receiving the optical transmission network interface frame, and performs the demapping processing according to the general mapping procedure based on the mapping overhead to calculate the customer.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • FIG. 12 is a schematic structural diagram of an optical transmission network device according to this embodiment, including a processor 1201, a memory 1202, and a communication bus 1203.
  • the communication bus 1203 is used to implement communication between the processor 1201 and the memory 1202. Connection and communication; the processor 1201 is configured to execute one or more computer programs stored in the memory 1202 to implement the mapping overhead transmission method or the mapping overhead receiving method in the foregoing embodiments of the present application, and details are not described herein again.
  • This embodiment provides a computer-readable storage medium.
  • the computer-readable storage medium stores one or more computer programs, and the computer programs can be executed by one or more processors to implement the mapping in the foregoing embodiments.
  • the overhead transmission method or the mapping overhead reception method will not be repeated here.
  • modules or steps of the embodiments of the present invention described above can be implemented by a general-purpose computing device, and they can be centralized on a single computing device or distributed by multiple computing devices.
  • they can be implemented with program code executable by a computing device, so that they can be stored in a computer storage medium (Read-Only Memory (ROM) / Random Access Memory (Random Access Memory, RAM), magnetic disks, and optical disks) are executed by a computing device, and in some cases, the steps shown or described can be performed in a different order than here, or they can be separately fabricated into individual integrated circuits Modules, or multiple modules or steps in them are made into a single integrated circuit module for implementation. Therefore, this application is not limited to any specific combination of hardware and software.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

Selon certains modes de réalisation, la présente invention concerne un procédé et un appareil de transmission d'en-tête de mappage, un procédé et un appareil de réception d'en-tête de mappage, un dispositif réseau de transport optique (OTN), et un support d'enregistrement. Une unité de données de canal optique est mappée sur une zone de données utiles d'une trame de signal de service d'une trame d'interface OTN selon une procédure de mappage universelle; la zone de données utiles de la trame de signal de service est remplie par un en-tête de mappage de la procédure de mappage universelle; la trame d'interface OTN est transmise.
PCT/CN2019/100411 2018-08-13 2019-08-13 Procédé et appareil de transmission d'en-tete de mappage, procédé et appareil de réception d'en-tete de mappage, dispositif otn et support d'enregistrement WO2020034954A1 (fr)

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CN201810916302.1A CN110830426B (zh) 2018-08-13 2018-08-13 映射开销传送/接收方法、装置、otn设备及存储介质

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WO2022241639A1 (fr) * 2021-05-18 2022-11-24 华为技术有限公司 Procédé de mappage et système de mappage
CN116112829A (zh) * 2021-11-09 2023-05-12 深圳市中兴微电子技术有限公司 光传送网的映射复用方法、装置、电子设备及存储介质
CN114051023B (zh) * 2021-11-11 2023-05-23 烽火通信科技股份有限公司 光业务单元帧开销处理方法、装置、设备及可读存储介质
CN114157383B (zh) * 2021-12-03 2023-04-28 安徽皖通邮电股份有限公司 基于FPGA的Cm时钟恢复算法、系统、存储介质及设备
CN117544274A (zh) * 2022-08-02 2024-02-09 中兴通讯股份有限公司 客户信号的处理方法、装置、电子设备和存储介质

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