WO2013177799A1 - Procédé et dispositif de transport pour la transmission de signal client dans un réseau de transport optique - Google Patents

Procédé et dispositif de transport pour la transmission de signal client dans un réseau de transport optique Download PDF

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Publication number
WO2013177799A1
WO2013177799A1 PCT/CN2012/076410 CN2012076410W WO2013177799A1 WO 2013177799 A1 WO2013177799 A1 WO 2013177799A1 CN 2012076410 W CN2012076410 W CN 2012076410W WO 2013177799 A1 WO2013177799 A1 WO 2013177799A1
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WIPO (PCT)
Prior art keywords
oduflex
column
unit
payload area
odu
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PCT/CN2012/076410
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English (en)
Chinese (zh)
Inventor
董立民
吴秋游
苏伟
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN2012800006717A priority Critical patent/CN102893629A/zh
Priority to PCT/CN2012/076410 priority patent/WO2013177799A1/fr
Publication of WO2013177799A1 publication Critical patent/WO2013177799A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1301—Optical transmission, optical switches

Definitions

  • the present invention relates to the field of optical communication technologies, and in particular, to a method and a transmission device for transmitting a client signal in an optical transport network. Background technique
  • OTN Optical Transport Network
  • OAM Operaation Administration and Maintenance
  • TCM Tumor Connection Monitoring
  • FEC Forward Error Correction
  • the four OTUs correspond to four ODUs (Optical Channel Data Units) of the same rate class, namely 0DU1, ODU2, ODU3, and P ODU4.
  • ODUs Optical Channel Data Units
  • a certain rate class ODU may be multiplexed to any ODU higher than the ODU to increase the data transmission rate.
  • the payload area of the ODU2 can be divided into four time slots (TS, Tributary Slot), and each time slot is used to carry one ODU1 data.
  • the OTN standard system also defines an ODUflex (Flexible Optical Channel Data Unit) to adapt to data services of various rates.
  • the ODUflex is restored by a General Mapping Procedure (GMP). It is used in any of the above ODUs in which the rate is higher than the ODUflex.
  • GMP General Mapping Procedure
  • OTN orthogonal Frequency Division Multiplexing
  • Multi-carrier technology can The number of subcarriers is selected according to the traffic of the transmitted data.
  • the high-order modulation technique requires a higher OSNR (Optical Signal Noise Rate) for the customer signal under the same transmission distance.
  • OSNR Optical Signal Noise Rate
  • the OTN cannot flexibly select the OTU with the appropriate line rate to match the available bandwidth of the fiber according to the change of the transmission distance, thus making the optical transmission network The fiber bandwidth utilization is not high.
  • PM-QPSK Polyization Mux- Quadrature Phase Shift Keying
  • the OTN has the ability to transmit the customer signal using an OTU with a higher line rate, for example, a high-order modulation technique PM-16QAM can be used.
  • the line rate of the OTU can be increased to 200G, however, since the existing OTN standard system does not define the line
  • the OTU with a rate of 200G that is, the line rate of the OTU can only be maintained at 100G, and cannot be increased to 200G to match the available bandwidth of the fiber, thereby causing waste of available bandwidth of the network.
  • the embodiments of the present invention provide a method for transmitting a client signal in an optical transport network and a transmitting device, so as to solve the problem that the OTU adopts a fixed rate in the prior art and the bandwidth utilization of the optical fiber is not high.
  • a method for transmitting a client signal in an optical transport network comprising: dividing a payload area of a high-order flexible optical channel data unit HO ODUflex into n time slots, where n is a natural number, The speed level of the flexible optical channel transmission unit OTUflex corresponding to the HO ODUflex is n times that of the GS, the GS Is a preset rate value; mapping the received client signal to the low-order optical channel data unit LO ODU; determining that the LO ODU occupies the number of slots of the HO ODUflex, where m is less than or equal to n Constructing an optical channel data tributary unit ODTU of the HO ODUflex, and mapping the LO ODU into the ODTU by using a universal mapping procedure GMP protocol; mapping an ODTU carrying the LO ODU to the HO ODUflex a payload area in which the selected m slots are located; generating OTUflex for adding forward error correction FEC data to the
  • a transmitting apparatus comprising a dividing unit, a first mapping unit, a determining unit, a building unit, a second mapping unit, a generating unit, and a transmitting unit.
  • the sending unit is configured to divide the payload area of the high-order flexible optical channel data unit HO ODUflex into n time slots, where the n is a natural number, and the line rate level of the OTUflex corresponding to the HO ODUflex is GS n times, the GS is a preset rate value.
  • the first mapping unit is configured to receive a client signal and map the client signal to a low-order optical channel data unit LO ODU.
  • the determining unit is configured to receive, by the first mapping unit, the LO ODU carrying the client signal, and determine the number of slots of the LO ODU occupying the HO ODUflex, where m is a natural number less than or equal to n.
  • the building unit is configured to construct an optical channel data tributary unit ODTU of the HO ODUflex.
  • the second mapping unit is configured to receive, by the first mapping unit, the LO ODU that carries a client signal, map the LO ODU into the ODTU by using a universal mapping procedure GMP protocol, and carry the LO ODU The ODTU is mapped to the payload area in which the selected m time slots in the HO ODUflex are located.
  • the generating unit is configured to generate OTUflex for adding forward error correction FEC data to the HO ODUflex.
  • the sending unit is configured to receive the OTUflex from the generating unit, and split the OTUflex into n data channels with a rate of GS for transmission.
  • a transmitting device comprising at least one processor, the at least one processor configured to perform: dividing a payload area of a high-order flexible optical channel data unit HO ODUflex into n a time slot, where n is a natural number, the rate level of the flexible optical channel transmission unit OTUflex corresponding to the HO ODUflex is n times the GS, the GS is a preset rate value; mapping the received client signal to Determining, in the low-order optical channel data unit LO ODU, the number of slots m of the HO ODUflex occupying the HO ODUflex, where m is a natural number less than or equal to n; constructing the optical channel data tributary unit ODTU of the HO ODUflex And mapping the LO ODU into the ODTU by using a universal mapping procedure GMP protocol; mapping an ODTU carrying the LO ODU to a payload area where the selected m time slots in the HO ODUflex are located
  • the embodiment of the present invention introduces a HO ODUflex with a new line rate class, and various LO ODUs can be multiplexed into the HO ODUflex, and the corresponding OTUflex is used for flexible rate transmission of data, so that the data bandwidth of the fiber bandwidth and the customer signal is The transmission distance is adapted to improve the utilization efficiency of the optical fiber bandwidth in the optical transport network.
  • FIG. 1A is a schematic structural diagram of an OTN system in an embodiment of the present invention.
  • 1B is a frame structure of a HO ODUflex in an embodiment of the present invention.
  • FIG. 2 is a flow chart of a first embodiment of a method of transmitting a client signal in an optical transport network
  • 3A is a schematic diagram of a first embodiment of dividing HO ODUflex into n time slots
  • FIG. 3B is a schematic diagram of a frame structure of an ODTU constructed in an embodiment of the present invention.
  • 3C is a schematic diagram of a second embodiment of dividing HO ODUflex into n time slots; 4 is a flow chart of an embodiment of dividing n data channels for OTUflex;
  • Figure 5 is a block diagram of a first embodiment of a transmitting apparatus of the present invention.
  • Figure 6 is a block diagram showing a first embodiment of a dividing unit in the transmitting apparatus of the present invention.
  • Figure 7 is a block diagram of a second embodiment of the transmitting apparatus of the present invention.
  • Figure 8 is a block diagram of a third embodiment of the transmitting apparatus of the present invention.
  • FIG. 9 is a block diagram of a fourth embodiment of the transmitting apparatus of the present invention. detailed description
  • the HO ODUflex High Order Optical Channel Data Unit flex
  • the ODU4 can also be multiplexed into the HO ODUflex as a low-order ODU.
  • LO ODU Low Order
  • the HO ODUflex frame structure defined by the embodiment of the present invention is the same as the ODU frame structure defined by G709.
  • the HO ODUflex frame structure includes 4 rows, and each row has 3824 bytes (columns), and the first column to the first column 14 is the overhead area of the HO ODUflex, and the 15th and 16th columns are the overhead areas of the HO ODUflex optical channel payload unit (OPUflex, Optical channel Payload Unit of flex order), which are 4 rows, 2 columns, 8 bytes, and 17th; Columns to column 3824 are the payload areas of the OPUflex, with a total of 4 rows of 3808 columns 4*3808 bytes for carrying client signals.
  • OPUflex Optical channel Payload Unit of flex order
  • the optical channel transmission unit corresponding to the HO ODUflex is an OTUflex (Optical Channel Transport Unit flex), wherein the Chinese meaning of flex is flexible, HO
  • the flex in ODUflex supports flexible optical channel bit rate
  • OTUflex supports flexible line transmission rate
  • the speed relationship between OTUflex and HO ODUflex is:
  • OTUflex ODUflex (HO) *255/239
  • OTUflex is the newly introduced line Rate rating.
  • the line rate class of OTUflex is an integer multiple of GS, that is, the line rate class of OTUflex is n*GS.
  • the Chinese meaning of GS (Grid Space) is the interval space, and GS is the preset rate value, and the unit is bit/s.
  • GS is the smallest unit of OTUflex's rate increase and decrease.
  • the value of GS can refer to ITU-T Recommendation G694.1 for the definition of Grid Space, for example, the value of GS. It is 12.5G level or 6.25G level; the interval space in G694.1 refers to the interval between the center frequencies of each optical channel, which is 12.5G level or 6.25G level.
  • the n is a natural number, indicating a line rate level of the OTUflex, and the value of the n may be selected according to a need to transmit a client signal, for example, according to at least one of a data flow, a transmission distance, and a modulation format of the client signal. To decide.
  • the value of n is 2 to the power of L, and L is a natural number.
  • the values of n mentioned in the specification are the same.
  • OTUflex can only define rate levels greater than OTU4, thus better compatible with existing OTUs. rate.
  • FIG. 1A it is a schematic diagram of an OTN architecture in an embodiment of the present invention.
  • HO ODUflex and OTUflex are added based on the existing OTN architecture.
  • HO ODUflex is suitable for carrying high-speed Ethernet data, such as 400GE or 1TGE Ethernet data
  • ODU4 is used to carry 100GE Ethernet data
  • ODU3 is suitable for carrying STM-256 data
  • ODU2 is suitable for carrying STM-64 data
  • ODU1 is used.
  • STM-16 data the Chinese name of STM (Synchronous Transport Module) is the synchronous transfer module.
  • GMP Generic Mapping Procedure
  • GFP Generic Frame Procedure
  • FEC Forward Error Correction
  • the payload area of the HO ODUflex is divided into n time slots TS (Tributary Slot, TS), and at this time, the structure of the HO ODUflex It is called HO ODUf.n.
  • the columns 17 to 3824 of the HO ODUflex are payload areas, and the payload area of the HO ODUflex includes 3808 columns.
  • the manner in which the HO ODUflex payload area is divided into n time slots is as follows:
  • a single frame time slot is divided for each frame HO ODUflex. From the 17th column to the 3824th column of each HO ODUflex, that is, from the 1st column to the 3808th column of the payload area of each HO ODUflex, sequentially labeling each column from 1 to n, each frame HO ODUflex
  • the 3808 column of the payload area is labeled ModC3808/n), and ModC3808/n) represents the remainder obtained by dividing 3808 by n. Columns with the same label belong to the same time slot, each time slot occupies an int (3808/n) column, and the int (3808/n) indicates that 3808 is divided by n and rounded down.
  • n when n is equal to 5, 3808/5 is equal to 761.6, Mod (3808/5) is equal to 3, and int (3808/5) is equal to 761.
  • n is not divisible by 3808, the bytes in the columns corresponding to the remainder are filled.
  • 5 can divide 3805 columns, and the remaining 3 columns are filled. Since each time slot occupies an int (3808/n) column and each column contains 4 bytes, each time slot occupies 4*int (3808/n) bytes.
  • n When the value of n is equal to any of the powers of L, 7, and 2 (L is a natural number less than or equal to 5), the n can be divisible by 3808, that is, the payload area of the HO ODUflex does not exist. The padded bytes.
  • the multiframe composed of the n frames HO ODUflex is divided into slots as a whole.
  • the payload area of HO ODUflex per frame has 3808 columns, and the division of 3808 columns into n parts may not be equally divided.
  • the multi-frame HO ODUflex multi-frame is divided into slots as a whole.
  • One of the OPUflex overheads of the frame HO ODUflex is used as the multiframe indication, that is, the MFI (Multiple Frame Indication) byte.
  • the value of the MFI byte is the same as the sequence number of the HO ODUflex in the multiframe.
  • the MFI byte takes values from 0 to n-1.
  • the MFI byte is carried in row 4, column 16, of HO ODUflex. Since each multiframe has a total of n *3808 columns, it can be equally divided into n slots, each slot having 3808 columns. For example, in any one of the multiframes, from the first column of the payload area of the first frame HO ODUflex to the 3808th column of the payload area of the HO ODUflex, the payload area of each HO ODUflex is sequentially Each column in the column is numbered from 1 to n, and columns having the same label belong to the same time slot, and each time slot occupies 3,808 columns. Since each time slot occupies 3808 columns and each column contains 4 bytes, each time slot occupies 3808*4 bytes.
  • determining that the LO ODU occupies the number of slots of the HO ODUflex constructs a flexible optical channel data tributary unit ODTUf.mn, where f is an abbreviation of flex, meaning Chinese is flexible, and m indicates ODTUf.mn occupation
  • f is an abbreviation of flex, meaning Chinese is flexible
  • m indicates ODTUf.mn occupation
  • the number of slots of HO ODUflex is m
  • n indicates that the rate level of OTUflex is n*GS.
  • the frame structure of ODTUf.m.n is shown in Figure 3B.
  • the frame structure of ODTUf.m.n includes 4 rows, m*3808 columns of data, and GMP overhead bytes.
  • the GMP overhead byte consists of 3 bytes, which are respectively carried in the 16th column 1-3 of the HO ODUflex; or the GMP overhead byte has 6 bytes, including 3 G7044 (G.HAO) Adjust the protocol overhead bytes, which are carried in lines 1-3 of columns 15 and 16 of HO ODUflex.
  • Step 201 The payload area of the HO ODUflex is divided into n time slots, where n is a natural number, and the line rate level of the OTUflex corresponding to the HO ODUflex is n times the GS, and the GS is a preset rate value. .
  • the value of n is determined according to at least one of data traffic, transmission distance, and modulation format of the client signal.
  • Step 202 Map the received client signal to the LO ODU.
  • the LO ODU is selected according to the type of the client signal, and the client signal is mapped to one or more LO ODUs of 0DU1, ODU2, ODU3, ODU4, and LO ODUflex.
  • Ethernet data of 400GE or ITGE corresponds to LO ODUflex
  • Ethernet data of 400GE or 1TGE is mapped to LO ODU such as LO ODUflex.
  • the mapping protocol may use GMP (Generic Mapping Procedure) defined in G709, or GFP (Generic Frame Procedure).
  • Step 203 Determine the number of slots of the HO ODUflex occupied by the LO ODU, where m is a natural number less than or equal to n.
  • Step 204 Construct an optical channel data tributary unit ODTU of the HO ODUflex, and set the LO
  • the ODU is mapped into the ODTU through a GMP protocol.
  • the ODTU when a single frame time slot is allocated for each frame HO ODUflex as shown in FIG. 3A, the ODTU includes a GMP overhead byte, and a 4-line, int (3808/n) column payload area. A total of 4 * int (3808 / n) bytes; when used as shown in Figure 3C will be n frames HO ODUflex
  • Step 205 Map the ODTU that carries the LO ODU to the payload area where the selected m time slots in the HO ODUflex are located, and map the GMP overhead bytes to the HO ODUflex overhead.
  • the data in the ODTU carrying the LO ODU is sequentially mapped one byte per byte to each byte in the payload area in which the selected m slots in the HO ODUflex are located.
  • the 3808*2 columns in the ODTU are mapped to the slots labeled 1 and 2 in the HO ODUflex, shadow
  • the first time slot and the second time slot indicated are time slots in which the ODTU is mapped.
  • the GMP overhead byte in this embodiment may be three bytes, or six bytes (including three GHAO adjustment protocol overhead bytes).
  • Step 206 Add an ETUflex by adding FEC data to the HO ODUflex.
  • Step 207 Split the OTUflex into n data channels with a rate of GS for transmission.
  • the OTUflex is split into n data channels of rate GS, and the client signals on the n data channels are transmitted to a modulator, and the modulators are used on the n data channels.
  • the client signal is modulated onto the subcarriers for transmission, and each of the subcarriers carries a client signal on one or more data channels.
  • the number of client signals corresponding to each subcarrier corresponds to the modulation format adopted by each subcarrier.
  • the subcarrier is an OFDM (Orthogonal Frequency Division Multiplexing) subcarrier.
  • This embodiment introduces HO ODUflex with a new line rate class, and various LO ODUs can be multiplexed into the HO ODUflex, and the corresponding OTUflex is used for flexible rate transmission of data, so that the fiber bandwidth is obtained. It is compatible with the data traffic and transmission distance of the customer signal, thereby improving the utilization efficiency of the optical fiber bandwidth in the optical transmission network.
  • the transmitting device 500 includes a dividing unit 502, a first mapping unit 504, a determining unit 506, a building unit 508, a second mapping unit 510, a generating unit 512, and a transmitting unit 514.
  • the dividing unit 502 is configured to divide the payload area of the high-order flexible optical channel data unit HO ODUflex into n time slots, where the n is a natural number, and the line rate level of the OTUflex corresponding to the HO ODUflex is GS n Times, the GS is a preset rate value.
  • the value of n is determined according to at least one of data traffic, transmission distance, and modulation format of the client signal.
  • the first mapping unit 504 is configured to receive a client signal and map the client signal into the LO ODU.
  • the first mapping unit 504 selects an LO ODU according to the type of the client signal, and maps the client signal to one or more of 0DU1, ODU2, ODU3, ODU4, and LO ODUflex.
  • 400GE or 1TGE Ethernet data corresponds to LO ODUflex
  • 400GE or 1TGE Ethernet data is mapped to LO ODUflex LO ODU.
  • the mapping protocol can use the GMP protocol defined in G709, or the GFP protocol.
  • the determining unit 506 is configured to receive, by the first mapping unit 504, the LO ODU that carries the client signal, and determine the number of slots of the HO ODU that occupy the HO ODUflex, where m is a natural number less than or equal to n.
  • the building unit 508 is configured to construct an optical channel data tributary unit ODTU of the HO ODUflex.
  • a second mapping unit 510 configured to receive, by the first mapping unit 504, the LO ODU carrying a client signal, map the LO ODU into the ODTU by using GMP, and carry the LO
  • the ODTU of the ODU is mapped to the payload area in which the selected m slots in the HO ODUflex are located, and the GMP overhead bytes are mapped into the overhead of the OOUflex of the HO ODUflex.
  • the data in the ODTU carrying the LO ODU is mapped byte by byte to each byte in the payload area in which the selected m slots in the HO ODUflex are located.
  • the generating unit 512 is configured to generate OTUflex for adding forward error correction FEC data to the HO ODUflex.
  • the sending unit 514 is configured to receive the OTUflex from the generating unit 512, and split the OTUflex into n data channels with a rate of GS for transmission.
  • the sending unit 514 splits the OTUflex into n data channels of rate GS, and transmits a client signal on the n data channel to a modulator, and the n data is modulated by a modulator.
  • the client signals on the channel are modulated onto subcarriers for transmission, and each of the subcarriers carries a client signal on one or more data channels.
  • the number of client signals corresponding to each subcarrier corresponds to the modulation format adopted by each subcarrier.
  • the subcarrier is an OFDM (Orthogonal Frequency Division Multiplexing) subcarrier.
  • the dividing unit 502 includes: a time slot dividing subunit 620 and an adding subunit 630.
  • the time slot division sub-unit 620 is configured to: use the multi-frame HO ODUflex multi-frame as a whole, from the first column of the first frame HO ODUflex payload area to the n-th frame HO ODUflex payload area Columns 3808, sequentially labeling each column in the payload area of each HO ODUflex from 1 to n, the columns with the same label belong to the same time slot, and each time slot occupies 3808 columns.
  • Adding a sub-unit 630 configured to add a multi-frame indication MFI in the OPUflex overhead of each HO ODUflex byte.
  • the MFI byte is one byte, and its value is the same as the sequence number of each HO ODUflex in the multiframe. As shown in FIG. 3C, the MFI byte takes values from 0 to n-1.
  • the dividing unit 502 is configured to sequentially label each column from 1 to n from the first column to the third column of the payload area of each HO ODUflex. Columns with the same label belong to the same time slot, each time slot occupies an int (3808/n) column, and int (3808/n) represents 3808 divided by n and rounded down.
  • the transmitting device 700 includes at least one processor 702, the at least one processor 702 configured to perform the following operations: dividing the payload area of the HO ODUflex into n time slots, where n is a natural number, and the HO ODUflex corresponds to The line rate level of the OTUflex is n times the GS, the GS is a preset rate value; the received client signal is mapped into the LO ODU; and the number of slots of the HO ODUflex occupying the HO ODUflex is determined.
  • n is a natural number less than or equal to n; constructing an optical channel data tributary unit ODTU of the HO ODUflex, and mapping the LO ODU into the ODTU through a GMP protocol; mapping an ODTU carrying the LO ODU Mapping the GMP overhead bytes into the overhead of the HO ODUflex to the payload area of the selected m slots in the HO ODUflex; adding the FEC data to the HO ODUflex to generate the OTUflex; and splitting the OTUflex n data channels of rate GS are transmitted.
  • the dividing the payload area of the HO ODUflex into n time slots comprises: acquiring n frames HO ODUflexOPUflex, each of the OPUflex divided into HO ODUflex payload areas having 3808 columns; and the n frames HO ODUflex consisting of multiple frames As a whole, from the first column of the payload area of the HO ODUflex of the first frame to the 3808th column of the payload area of the HO ODUflex of the nth frame, sequentially performing each column in the payload area OPUflex of each frame HO ODUflex From 1 to n cyclic labels, columns with the same label belong to the same time slot, each time slot occupies 3808 columns; add multiframe indication MFI bytes in the OPUflex overhead of each HO ODUflex.
  • the value of the n is based on the data flow, the transmission distance, and the modulation grid of the client signal. It is determined by at least one of the formulas that the ODTU includes a GMP overhead byte, and a 4-row, m*3808 column payload area.
  • the at least one processor 702 may be a CP1KCentral Processing Unit, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or a collection of multiple .
  • Transfer device 800 includes a memory
  • the memory 802 being connectable to the at least one processor 804, the memory 802 storing instructions executable by the at least one processor 804.
  • the memory 802 also buffers the received client signals.
  • the at least one processor 804 is configured to execute the instruction to perform the following operations: dividing a payload area of the H0 ODUflex into n time slots, where n is a natural number, and the line rate level of the OTUflex corresponding to the HO ODUflex Is n times the GS, the GS is a preset rate value; mapping the received client signal to the LO 0DU; determining that the LO 0DU occupies the number of slots of the HO ODUflex, where m is a natural number less than or equal to n; constructing an optical channel data tributary unit ODTU of the HO ODUflex, and mapping the LO 0DU into the ODTU through a GMP protocol; mapping an ODTU carrying the LO ODU to a HO ODUflex Mapping the GMP overhead bytes into the overhead of the HO ODUflex in the payload area in which the m slots are located; adding the FEC data to the HO ODUflex to generate the OTUflex; and splitting the
  • the dividing the payload area of the HO ODUflex into n time slots comprises: acquiring an OPUflex of an n-frame HO ODUflex, and each of the OPUflex is divided into 3808 columns of the HO ODUflex payload area; and the n-frame HO ODUflex is formed.
  • the multiframe as a whole from the first column of the payload area of the HO ODUflex of the first frame to the 3808th column of the payload area of the HO ODUflex of the nth frame, sequentially for each frame within the payload area OPUflex of the HO ODUflex
  • a column carries a cyclical label from 1 to n, columns with the same label belong to the same time slot, each time slot occupies 3808 columns; a multiframe is indicated in the OPUflex overhead of each HO ODUflex to indicate MFI bytes.
  • the value of the n is determined according to at least one of a data flow, a transmission distance, and a modulation format of the client signal, where the ODTU includes a GMP overhead byte and 4 rows, m*3808 columns. Lotus area.
  • the at least one processor 802 may be one of a CPU (Central Processing Unit), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), or multiple Collection.
  • the transmitting device 900 includes a dedicated integrated circuit 902, a digital signal processor 904, a DAC (Diginal Analog Conventer) 906, a light modulator 908, and a laser 910.
  • DAC Dynamic Analog Conventer
  • the ASIC 902 is configured to perform the following operations: divide the payload area of the HO ODUflex into n time slots, where n is a natural number, and the line rate level of the OTUflex corresponding to the HO ODUflex is n times of the GS.
  • the GS is a preset rate value; mapping the received client signal to the LO ODU; determining that the LO ODU occupies the number of slots of the HO ODUflex, where m is a natural number less than or equal to n; Constructing an optical channel data tributary unit ODTU of the HO ODUflex, and mapping the LO ODU into the ODTU by using a GMP protocol; mapping the ODTU carrying the LO ODU to the selected m time slots in the HO ODUflex In the payload area, the GMP overhead byte is mapped into the HO ODUflex overhead; the FOC data is added to the HO ODUflex to generate the OTUflex; and the OTUflex is split into n data channels of the rate GS, and The client signals on the n data channels are passed to digital signal processor 904.
  • the dividing the payload area of the HO ODUflex into n time slots comprises: acquiring an OPUflex of an n-frame HO ODUflex, and each of the OPUflex is divided into 3808 columns of the HO ODUflex payload area; and the n-frame HO ODUflex is formed.
  • the multiframe as a whole from the first column of the payload area of the HO ODUflex of the first frame to the 3808th column of the payload area of the HO ODUflex of the nth frame, sequentially for each frame within the payload area OPUflex of the HO ODUflex
  • One column carries the label from 1 to n, and the columns with the same label belong to the same time slot, each time slot occupies 3808 Column; Add a multiframe to indicate the MFI byte in the OPUflex overhead of each HO ODUflex.
  • the value of the n is determined according to at least one of a data traffic, a transmission distance, and a modulation format of the client signal, where the ODTU includes a GMP overhead byte, and 4 rows, m*3808 columns. Payload area.
  • the digital signal processor 904 is configured to receive a client signal on the n data channels from the application specific integrated circuit 902, and process a client signal on the n data channels to generate a digital modulated signal required by the optical domain. .
  • the digital signal processor 904 makes corresponding changes to accommodate this change, thereby enabling the transmission of customer signals with flexible line rates.
  • the digital to analog converter 906 is configured to receive the digitally modulated signal from a digital signal processor 904 and convert the digitally modulated signal into an analog signal.
  • the optical modulator 908 is configured to receive the analog signal from a digital to analog converter 906, and modulate the analog signal into I and Q components for transmission.
  • the laser 910 is a device for generating laser light for delivering the laser light to the light modulator 908.
  • various LO ODUs can be multiplexed into the HO ODUflex, and the corresponding OTUflex is used to transmit data at a flexible rate, so that the bandwidth of the optical fiber is adapted to the data traffic and the transmission distance of the client signal, thereby Improve the utilization efficiency of fiber bandwidth in optical transport networks.
  • the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a disk, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.
  • a computer device which may be a personal computer, server, or network device, etc.

Abstract

L'invention concerne un procédé et un dispositif de transport, destinés à la transmission de signal client dans un réseau de transport optique. Ledit procédé comprend : la division du champ de charge utile du FLEX d'unité de données de canal optique d'ordre élevé (HO ODUflex) en n fentes, n étant un entier naturel, le niveau de taux du FLEX d'unité de transport de canal optique (OTUflex), amené à correspondre audit HO ODUflex, étant n fois GS, ladite valeur GS étant une valeur de taux prédéfinie; la cartographie d'un signal client en unité de données de canal optique d'ordre inférieur (LO ODU); ladite LO ODU est multiplexée en HO ODUflex; des données FEC sont ajoutées audit HO ODUflex pour générer l'OTUflex. Dans un mode de réalisation de l'invention, un signal client est cartographié en LO ODU, ladite LO ODU est multiplexée en HO ODUflex, les données FEC sont ajoutées audit HO ODUflex pour générer l'OTUflex et ledit OTUflex est divisé en n canaux de données avec le taux GS pour la transmission. Dans le mode de réalisation de l'invention, en construisant le HO ODUflex, différentes LO ODU peuvent être multiplexées en ledit HO ODUflex et l'OTUflex correspondant est utilisé pour transmettre les données avec un taux flexible. Par conséquent, l'efficacité d'utilisation de la largeur de bande de fibre dans le réseau de transport optique est améliorée.
PCT/CN2012/076410 2012-06-01 2012-06-01 Procédé et dispositif de transport pour la transmission de signal client dans un réseau de transport optique WO2013177799A1 (fr)

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CN2012800006717A CN102893629A (zh) 2012-06-01 2012-06-01 光传送网中传送客户信号的方法及传送设备
PCT/CN2012/076410 WO2013177799A1 (fr) 2012-06-01 2012-06-01 Procédé et dispositif de transport pour la transmission de signal client dans un réseau de transport optique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034954A1 (fr) * 2018-08-13 2020-02-20 中兴通讯股份有限公司 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

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103997387B (zh) * 2013-02-18 2018-08-24 中兴通讯股份有限公司 数据的映射、复用、解复用和解映射方法及装置
CN103533464B (zh) 2013-09-13 2016-11-23 华为技术有限公司 迁移数据的方法和通信节点
CN105451102B (zh) 2014-08-22 2019-05-28 华为技术有限公司 一种处理信号的方法、装置及系统
CN105429840B (zh) * 2014-09-15 2020-11-03 中兴通讯股份有限公司 数据传输方法和装置
CN106559141B (zh) 2015-09-25 2020-01-10 华为技术有限公司 一种信号发送、接收方法、装置及系统
CN107566074B (zh) * 2016-06-30 2019-06-11 华为技术有限公司 光传送网中传送客户信号的方法及传送设备
CN107979434B (zh) * 2016-10-21 2019-07-19 深圳市中兴微电子技术有限公司 一种进行odu业务调度的方法及装置
CN108809901B (zh) * 2017-05-02 2021-05-04 华为技术有限公司 一种业务承载的方法、设备和系统
CN107241659B (zh) * 2017-05-27 2019-06-21 烽火通信科技股份有限公司 光传送网通用映射规程的仿真系统及仿真方法
WO2019090696A1 (fr) 2017-11-10 2019-05-16 华为技术有限公司 Procédé et appareil pour le transport d'un signal d'unité de transport optique
WO2019223000A1 (fr) * 2018-05-25 2019-11-28 华为技术有限公司 Procédé et dispositif de transmission de données
CN110830142A (zh) * 2018-08-10 2020-02-21 中兴通讯股份有限公司 一种业务切换的方法、装置及存储介质
CN113099323A (zh) 2020-01-08 2021-07-09 华为技术有限公司 光信号传送方法和相关装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101834688A (zh) * 2009-03-09 2010-09-15 华为技术有限公司 光传送网中的映射、解映射方法及装置
CN102130787A (zh) * 2011-03-02 2011-07-20 华为技术有限公司 一种网管设备及其管理ODUflex帧的空闲时隙的方法
CN102369681A (zh) * 2009-03-09 2012-03-07 阿尔卡特朗讯 在光传输网络中进行数据传输的方法
CN102439995A (zh) * 2011-08-24 2012-05-02 华为技术有限公司 一种传送超高速以太网业务的方法和装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5578957B2 (ja) * 2010-06-16 2014-08-27 日本電信電話株式会社 デジタル伝送システム及びデジタル伝送方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101834688A (zh) * 2009-03-09 2010-09-15 华为技术有限公司 光传送网中的映射、解映射方法及装置
CN102369681A (zh) * 2009-03-09 2012-03-07 阿尔卡特朗讯 在光传输网络中进行数据传输的方法
CN102130787A (zh) * 2011-03-02 2011-07-20 华为技术有限公司 一种网管设备及其管理ODUflex帧的空闲时隙的方法
CN102439995A (zh) * 2011-08-24 2012-05-02 华为技术有限公司 一种传送超高速以太网业务的方法和装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020034954A1 (fr) * 2018-08-13 2020-02-20 中兴通讯股份有限公司 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

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