WO2010135864A1 - Procédé, dispositif et système de communication pour transmettre des données de client - Google Patents

Procédé, dispositif et système de communication pour transmettre des données de client Download PDF

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Publication number
WO2010135864A1
WO2010135864A1 PCT/CN2009/072002 CN2009072002W WO2010135864A1 WO 2010135864 A1 WO2010135864 A1 WO 2010135864A1 CN 2009072002 W CN2009072002 W CN 2009072002W WO 2010135864 A1 WO2010135864 A1 WO 2010135864A1
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WIPO (PCT)
Prior art keywords
customer data
channels
virtual channels
data
delay
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PCT/CN2009/072002
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English (en)
Chinese (zh)
Inventor
曾理
沈瑶
向俊凌
苏伟
丁炽武
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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 CN200980000540.7A priority Critical patent/CN101981831B/zh
Priority to PCT/CN2009/072002 priority patent/WO2010135864A1/fr
Publication of WO2010135864A1 publication Critical patent/WO2010135864A1/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]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, device, and communication system for transmitting customer data.
  • Optical Transport Network (OTN) technology is considered to be the core technology of the next generation transport network.
  • 0TN has powerful TCM (Tandem Connection Monitoring) capability, rich operation, management, maintenance (OAM) capability, and FEC (Forward Error Correction) capability. Flexible scheduling and management of capacity services.
  • the G.709 recommendations developed by the International Telecommunication Union's Communications Standards Department (ITU-T) are primarily concerned with standards for OTN frame structure and mapping.
  • the standard frame structure of the OTN defined in the G.709 recommendation can be as shown in Figure 1.
  • the OTN frame is a modular structure of 4080*4, including: Frame Positioning Data (FAS, Frame Alignmem Signal), which is used to provide frame synchronization positioning.
  • FAS Frame Positioning Data
  • FAS Frame Alignmem Signal
  • Optical channel transport unit k (ODUk, Optical Channel Transport Unit-k) overhead (OH, Overhead), used to provide optical network transport unit level network management functions; Optical channel data unit k (ODUk, Optical Channel Data Unit-k Overhead, used to provide maintenance and operation functions; Optical Channel Payload Unit-k (OPUk, Optical Channel Payload Unit-k) overhead, used to provide service adaptation functions; OPUk Payload (payload), also known as OTN
  • the payload area of the frame is mainly used to provide the bearer function of the service; the FEC is a forward error correction byte for providing error detection and error correction.
  • the coefficient k represents the supported bit rate and different kinds of OPUk, ODUk and ODUk.
  • the rate is 40 Gbit/s
  • k 4, indicating a bit rate of 100 Gbit/s.
  • the OTN equipment usually needs to compensate the customer data with a certain delay.
  • the OTN bearer transmits 100GE (100 Gigabit Ethernet) service
  • the existing technology selects 100GE customer data to access the OTN domain, and the OTN data sender (source) first performs data integration and delay compensation for 100GE customer data. And then map to ODU4 to transmit on OTN, and OTN data receiver (destination) After the 100GE customer data carried by the ODU4 is demapped, the delay compensation is usually not performed.
  • the inventors have found that the prior art performs delay compensation operation on 100GE client data at the OTN source end, and the OTN destination end usually does not perform delay compensation, since the customer data is not transmitted on the OTN.
  • the possible delay may result in the unavailability of customer data, and the reliability of prior art solutions for transmitting customer data is relatively low.
  • the technical problem to be solved by the embodiments of the present invention is to provide a method, a device, and a communication system for transmitting customer data, which can relatively improve the reliability of transmission of customer data.
  • a method of transmitting customer data including:
  • Receiving and de-mapping the optical channel data unit ODUk obtaining customer data of multiple channels carried by the ODUk; delaying compensation for the obtained customer data of multiple channels; and transmitting the customer data after delay compensation.
  • a transport network node comprising:
  • a receiving parsing module configured to receive and demap the ODUk, to obtain customer data of multiple channels carried by the ODUk; and a delay compensation module, configured to delay compensation of customer data of multiple channels obtained by the receiving parsing module;
  • a sending module is configured to send the delay compensation module to perform customer data after delay compensation.
  • a communication system comprising:
  • a first node configured to acquire customer data of multiple channels; map the acquired customer data of multiple channels to the ODUk and send; the second node is configured to receive and demap the ODUk, and obtain a client of multiple channels carried by the ODUk Data; delay compensation for customer data of multiple channels obtained; sending customer data after delay compensation.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, and can cancel the customer data to be transmitted on the OTN.
  • the possible delay can relatively improve the reliability of the transmission of customer data; at the same time, the complexity of data processing at the OTN sender is relatively reduced.
  • FIG. 1 is a schematic structural diagram of an OTN frame provided by the prior art
  • FIG. 2 is a flowchart of a method for transmitting customer data according to Embodiment 1 of the present invention
  • FIG. 3 is a flowchart of a method for transmitting customer data according to Embodiment 2 of the present invention.
  • FIG. 5 is a flowchart of a method for transmitting customer data according to Embodiment 4 of the present invention.
  • FIG. 6 is a flowchart of a method for transmitting customer data according to Embodiment 5 of the present invention.
  • FIG. 7 is a flowchart of a method for transmitting customer data according to Embodiment 6 of the present invention.
  • FIG. 8 is a flowchart of a method for transmitting customer data according to Embodiment 7 of the present invention.
  • FIG. 9 is a schematic structural diagram of a transport network node according to Embodiment 8 of the present invention.
  • FIG. 10 is a schematic structural diagram of a transport network node according to Embodiment 9 of the present invention.
  • FIG. 11 is a schematic structural diagram of a communication system according to Embodiment 10 of the present invention.
  • FIG. 12 is a schematic structural diagram of another communication system according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another communication system according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of another implementation manner of transmitting customer data according to an embodiment of the present invention
  • FIG. 15 is a schematic diagram of another implementation manner of transmitting customer data according to an embodiment of the present invention.
  • the embodiment of the invention provides a method, a device and a communication system for transmitting customer data.
  • the transmitting end does not perform delay compensation
  • the receiving end performs delay compensation, and can Relatively improve the reliability of the transmission of customer data.
  • a first embodiment of a method for transmitting customer data in an embodiment of the present invention may include:
  • the sender can obtain customer data of multiple channels, and map the acquired client data of multiple channels to one or more ODUks and send them.
  • the receiving end can receive and demap one or more ODUks sent by the sending end, and obtain multiple physical channels and/or one or more ODUs. Or customer data for multiple virtual channels.
  • the sender can map the client data of the multiple channels to the ODUk in multiple manners, and the receiver can use the corresponding multiple methods to demap the received ODUk.
  • the present invention is not limited.
  • the sender can obtain customer data of 10 physical channels of a 100 Gigabit Attachment Unit Interface (CAUI) from an Ethernet device or other device.
  • CAUI Gigabit Attachment Unit Interface
  • the sending end can demultiplex the acquired customer data of 10 physical channels of the CAUI into 20 virtual channel customer data, and map 20 virtual channel customer data to 80 time slots of the ODU4. send.
  • the receiving end can receive and demap 80 time slots of the ODU4 sent by the OTN data sending end, and obtain customer data of 20 virtual channels carried by the ODU4.
  • the sender can directly map the acquired client data of the 10 physical channels of the CAUI to 80 slots of the ODU4 and send the data.
  • the receiving end can receive and de-map 80 time slots of the ODU4 sent by the sending end, and obtain customer data of 10 physical channels of the CAUI carried by the ODU4.
  • the sender can map the customer data of the 10 physical channels of the CAUI to the ODU2e-10v, split the ODU2e-10v into 10 ODU2e, and send and transmit the 10 physical channels of the CAUI directly.
  • the customer data is mapped to 10 ODU2e and sent.
  • the receiving end can receive and demap the 10 ODU2e sent by the sending end, and obtain the customer data of 10 physical channels of the CAUI carried by the 10 ODU2e.
  • the customer data of multiple channels obtained by the receiving end is customer data of multiple physical channels
  • the customer data of the obtained multiple physical channels is demultiplexed into customer data of multiple virtual channels; Detecting the aligned word code blocks in the customer data of the plurality of virtual channels that are demultiplexed, respectively obtaining delay information of the customer data of the plurality of virtual channels; and according to the obtained delay information of the customer data of the plurality of virtual channels, The customer data of multiple virtual channels demultiplexed is subjected to delay compensation.
  • the delay information of the customer data of the multiple virtual channels is respectively obtained; according to the obtained delay information of the customer data of the multiple virtual channels, Delay compensation for customer data of multiple virtual channels obtained.
  • the terminal can demultiplex the customer data of the 10 physical channels of the CAUI into the customer data of the 20 virtual channels, and obtain the delay information of the customer data of the 20 virtual channels respectively, and delay information of the customer data of the 20 virtual channels. Carry in the ODUk overhead area.
  • the receiving end can demap the ODUk overhead area, obtain the customer data delay information of the 20 virtual channels carried by the receiving end, and delay the compensation of the customer data of the 20 virtual channels according to the obtained delay information.
  • the receiving end may demultiplex the obtained client data of 10 physical channels of the CAUI into customer data of 20 virtual channels; and detect the aligned word blocks in the customer data of the 20 virtual channels, respectively Obtaining delay information of customer data of 20 virtual channels; delay compensation of customer data of 20 virtual channels obtained according to the obtained delay information of customer data of 20 virtual channels.
  • the receiving end can multiplex the customer data of the compensated 20 virtual channels into customer data of 10 physical channels of the CAUI, and can transmit the multiplexed CAUI 10 to the Ethernet device or other device. Customer data for each physical channel.
  • the OTN transmitting end does not perform delay compensation on the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the client data on the OTN. It can relatively improve the transmission reliability of customer data; at the same time, it reduces the complexity of data processing at the OTN sender.
  • Embodiment 2
  • this embodiment uses a OTN to transmit 100GE services, a node A (source) to obtain delay information, and a node B (destination) to perform delay compensation as an example for specific description.
  • a method for transmitting customer data according to Embodiment 2 of the present invention may include: 301.
  • Node A acquires customer data of 10 10G physical channels of the CAUI.
  • Node A can obtain customer data of 10 physical channels of CAUI from an Ethernet device.
  • Each physical channel of the CAUI is a 10G physical channel.
  • Node A demultiplexes the obtained customer data of 10 10G physical channels into customer data of 20 virtual channels.
  • node A can perform bit demultiplexing of customer data that acquires 10 10G physical channels of a 100-bit connection unit interface, and restores it to 20 virtual channel client data.
  • Node A detects aligned word code blocks in customer data of 20 virtual channels, and obtains 20 respectively. Delay information for customer data for virtual channels.
  • the client data of each virtual channel generally includes a data code block and a plurality of control word code blocks (if the code block size 66B is called a 66B code block), the alignment word code block is one of the control word code blocks.
  • the alignment block is usually periodically inserted between other blocks to indicate the delay, and each virtual channel corresponds to a differently coded alignment block.
  • node A can bypass the alignment code blocks in the customer data of 20 virtual channels to obtain the delay information of 20 virtual channels.
  • Node A maps the customer data of the 20 virtual channels to 80 time slots of the ODU4, and maps the delay information of the customer data of the 20 virtual channels to the overhead area of the ODU4 and sends the data.
  • node A can map customer data of 20 virtual channels demultiplexed into 80 time slots of ODU4, and client data of each virtual channel can be mapped to any 4 time slots of ODU4. in.
  • Node A can map the customer data of 20 virtual channels to 80 time slots of ODU4 in a unified control manner.
  • Node A can also map the obtained delay information of 20 virtual channels to the overhead area of ODU4 and send ODU4.
  • the Node B receives and demaps the ODU4, and obtains the client data of the 20 virtual channels carried by the ODU4 and the delay information of the client data of the 20 virtual channels.
  • the node B can receive the ODU4 sent by the node A, and demap the received 80 slots of the ODU4 to obtain the client data of the 20 virtual channels it carries.
  • the Node B can also demap the received overhead area of the ODU4 to obtain the delay information of the client data of the 20 virtual channels it carries.
  • the node B performs delay compensation on the obtained client data of the 20 virtual channels according to the obtained delay information of the 20 virtual channels.
  • Node B multiplexes the customer data of the 20 virtual channels after the delay compensation into the customer data of the 10 physical channels of the CAUI and sends the data.
  • node A can multiplex customer data of 20 virtual channels after delay compensation into customer data of 10 10G physical channels of CAUI, and can send its multiplexing to Ethernet devices or other devices. Customer data for 10 10G physical channels into CAUI.
  • the OTN transmitting end does not delay compensation for the customer data, and the OTN receiving end delays the customer data, and can cancel the customer data.
  • the delay caused by the transmission on the OTN can relatively improve the reliability of the transmission of the customer data; at the same time, the complexity of the data processing of the OTN sender is relatively reduced; and the processing of the client data transmission is completed as a whole.
  • the client data of the 10 10G physical channels of the CAUI is demultiplexed by the transmitting end, and the delay information is obtained, and the data processing load of the receiving end is relatively shared.
  • node A maps customer data of 10 10G physical channels of CAUI to ODU4, and node B (destination end) performs delay compensation as an example for specific description.
  • a method for transmitting customer data according to Embodiment 3 of the present invention may include: 401.
  • Node A acquires customer data of 10 10G physical channels of the CAUI.
  • Node A maps customer data of 10 10G physical channels to ODU4 and sends them separately.
  • node A can asynchronously map and transmit the customer data of the 10 10G physical channels of the CAUI to the ODU4 in an n-bit interleaving manner.
  • the Node B receives and demaps the ODU4, and obtains customer data of 10 10G physical channels of the CAUI carried by the ODU4.
  • the node B can receive the ODU4 sent by the node A, and demap the OPU4 payload area of the received ODU4 to obtain the customer data of the 10 10G physical channels of the CAUI carried by the node.
  • Node B demultiplexes the obtained 10 10G physical channel customer data into 20 virtual channel customer data.
  • node A demultiplexes the customer data of the 10 10G physical channels of the CAUI and restores it to 20 virtual channel client data.
  • Node B detects the aligned word code blocks in the customer data of the 20 virtual channels, and obtains delay information of the customer data of the 20 virtual channels respectively.
  • Node B can perform 66B code block synchronization on the customer data of 20 virtual channels, and then detect the aligned word code blocks in the customer data of 20 virtual channels to obtain 20 virtual channel clients respectively. Delay information for the data.
  • Node B performs delay compensation on the obtained client data of the 20 virtual channels according to the obtained delay information of the 20 virtual channels.
  • Node B multiplexes customer data of 20 virtual channels after delay compensation into 10 physical entities. Channel customer data is sent.
  • the step 407 can be the same as the step 307.
  • the specific implementation process of the step 407 can refer to the related description in step 307, and details are not described herein again.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the customer data on the OTN, and can Relatively improve the reliability of the transmission of customer data; at the same time relatively reduce the complexity of data processing at the OTN sender; from the overall process of customer data transfer.
  • node A maps customer data of 10 10G physical channels of CAUI to 80 time slots of ODU4, and node B (destination end) performs delay compensation as an example for specific description.
  • a method for transmitting customer data according to Embodiment 4 of the present invention may include:
  • Node A obtains customer data of 10 10G physical channels of CAUI.
  • the node A maps the acquired customer data of the 10 10G physical channels of the CAUI into 80 time slots of the ODU4 and sends the data.
  • the node A can map the acquired customer data of 10 10G physical channels of the CAUI to 80 time slots of the ODU4, and the customer data of each 10G physical channel can be mapped to any 8 time slots of the ODU4. in.
  • Node A can map 10 10G physical channel customer data to 80 time slots of ODU4 in a unified control manner.
  • the Node B receives and demaps the ODU4, and obtains customer data of 10 10G physical channels of the CAUI carried by the ODU4.
  • the node B can receive the ODU4 sent by the node A, and demap the 80 time slots of the received ODU4 to obtain the customer data of the 10 10G physical channels of the CAUI carried by the node.
  • Node B demultiplexes the obtained customer data of 10 10G physical channels of the CAUI into customer data of 20 virtual channels.
  • node A demultiplexes the customer data of the 10 10G physical channels of the CAUI and restores it to 20 virtual channel client data.
  • Node B detects the aligned word blocks in the customer data of the 20 virtual channels, and obtains delay information of the customer data of the 20 virtual channels respectively.
  • step 505 can be the same as step 405, and the specific execution process of step 505 Reference may be made to the related description in step 405, and details are not described herein again.
  • the node B performs delay compensation on the obtained customer data of the 20 virtual channels according to the obtained delay information of the 20 virtual channels.
  • the node B multiplexes the customer data of the 20 virtual channels after the delay compensation into the customer data of the 10 10G physical channels of the CAUI and sends the data.
  • the step 507 is the same as the step 307.
  • the specific implementation process of the step 507 can refer to the related description in step 307, and details are not described herein again.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the customer data on the OTN, and can Relatively improve the reliability of the transmission of customer data; at the same time relatively reduce the complexity of data processing at the OTN sender; from the overall process of customer data transfer.
  • node A maps customer data of 10 10G physical channels of CAUI to ODU2e-10v, and sends them through 10 ODU2e
  • node B destination
  • a method for transmitting customer data according to Embodiment 5 of the present invention may include:
  • Node A obtains customer data of 10 10G physical channels of the CAUI.
  • Node A maps the acquired customer data of the 10 10G physical channels of the CAUI to the ODU2e-10v.
  • the ODU2e-10v is a cascading structure, and the ODU2e-10v can be split into 10 ODU2es.
  • Node A splits ODU2e-10v into 10 ODU2e and sends it.
  • Node B receives and demaps 10 ODU2e, and obtains customer data of 10 10G physical channels of CAUI carried by 10 ODU2e.
  • Node B can receive 10 ODU2e sent by Node A, and demap 10 ODU2e received, and obtain customer data of 10 10G physical channels of CAUI carried by it.
  • Node B demultiplexes the obtained customer data of 10 10G physical channels of the CAUI into customer data of 20 virtual channels.
  • the Node B detects the aligned word code blocks in the customer data of the 20 virtual channels, and obtains delay information of the customer data of the 20 virtual channels respectively.
  • the step 606 is the same as the step 405.
  • the specific implementation process of the step 606, refer to the related description in the step 405, and details are not described herein again.
  • the node B performs delay compensation on the obtained client data of the 20 virtual channels according to the obtained delay information of the 20 virtual channels.
  • the node B multiplexes the customer data of the 20 virtual channels after the delay compensation into the customer data of the 10 10G physical channels of the CAUI and sends the data.
  • the step 608 can be the same as the step 307.
  • the specific implementation process of the step 608 can refer to the related description in step 307, and details are not described herein again.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the customer data on the OTN, and can Relatively improve the reliability of the transmission of customer data; at the same time relatively reduce the complexity of data processing at the OTN sender; from the overall process of customer data transfer.
  • node A maps customer data of 10 10G physical channels of CAUI to 10 ODU2e
  • node B destination end
  • performs delay compensation as an example for specific description.
  • a method for transmitting customer data according to Embodiment 6 of the present invention may include:
  • Node A obtains customer data of 10 10G physical channels of the CAUI.
  • the node A maps the acquired customer data of the 10 10G physical channels of the CAUI to 10 ODU2e and sends the data.
  • Node B receives and demaps 10 ODU2e, and obtains customer data of 10 10G physical channels of CAUI carried by 10 ODU2e.
  • Node B can receive 10 ODU2e sent by Node A, and demap 10 ODU2e received, and obtain customer data of 10 10G physical channels of CAUI carried by it.
  • Node B demultiplexes the obtained customer data of 10 10G physical channels of the CAUI into customer data of 20 virtual channels.
  • Node B detects the aligned word code blocks in the customer data of the 20 virtual channels, and obtains delay information of the customer data of the 20 virtual channels respectively.
  • step 705 can be the same as step 405.
  • the specific implementation process of step 705 can refer to the related description in step 405, and details are not described herein again.
  • the node B performs delay compensation on the obtained client data of the 20 virtual channels according to the obtained delay information of the 20 virtual channels.
  • the node B multiplexes the customer data of the 20 virtual channels after the delay compensation into the customer data of the 10 physical channels of the CAUI and sends the data.
  • step 707 can be the same as step 307.
  • the specific implementation process of step 707 can refer to the related description in step 307, and details are not described herein again.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the customer data on the OTN, and can Relatively improve the reliability of the transmission of customer data; at the same time relatively reduce the complexity of data processing at the OTN sender; from the overall process of customer data transfer.
  • Example 7
  • the node A (source) can also map the customer data of the N physical channels that are independent of each other to the ODUk, and the node B (the destination end) forwards the customer data of the N physical channels to For example, a detailed description will be given.
  • a method for transmitting customer data according to Embodiment 6 of the present invention may include: 801. Node A acquires customer data of N physical channels that are independent of each other.
  • the node A can also obtain the customer data of the 10 physical channels that are independent of each other.
  • the service type of the customer data of the 10 physical channels that are independent of each other may include at least one of the following 10G CBR services: 10GE/FC service, 10G STM-64 service, etc., and the present invention is not limited thereto.
  • Node A maps the acquired customer data of the mutually independent N physical channels to the ODUk and sends the data.
  • node A can obtain 10GE CBR service data of 10 physical channels that are independent of each other and map them to 10 ODU2e or ODU2 and send them.
  • the node A can also obtain the 10G CBR service data of the 10 physical channels that are independent of each other and map them to 80 time slots of the ODU4 and send them.
  • the 10G CBR service data of each physical channel is mapped to the ODU4. 8 time slots.
  • the Node B receives and demaps the ODUk, and obtains mutually independent N PHYs carried by the ODUk. Customer data for the channel.
  • Node B can receive 10 ODU2e or ODU2 sent by Node A, and demap 10 10 CBR service data of 10 independent physical channels carried by 10 ODU2e or ODU27
  • node A can also receive ODU4 sent by node A and demap it.
  • the 80 slots of the ODU4 obtain 10G CBR service data of 10 physical channels independently of each other.
  • Node B recovers clock information of customer data of N physical channels independently of each other, and sends customer data of N physical channels according to clock information of customer data of N channels.
  • Node B can recover the clock information of 10G CBR service data of 10 physical channels, and send 10G CBR service data of 10 physical channels according to the clock information of 10G CBR service data of each channel.
  • the node A and the node B are compatible with the bearer 10G CBR service, and have greater practicability.
  • Example eight
  • a transport network node is further provided in the embodiment of the present invention.
  • a transport network node in Embodiment 8 of the present invention may include: a data acquisition module 910 and a mapping transmission module 920.
  • the data acquisition block 910 is used to acquire customer data of multiple channels.
  • the data acquisition module 910 can obtain customer data of 10 physical channels of the CAUI from an Ethernet device or other device.
  • the mapping sending module 920 is configured to map the customer data of the multiple channels acquired by the data acquiring module 910 to the ODUk and send the data.
  • mapping sending module 920 can use multiple channels of customer data acquired by the data obtaining module 910 to the ODUk.
  • mapping sending module 920 can include:
  • the demultiplexing submodule 921 is configured to demultiplex customer data of 10 physical channels of the CAUI acquired by the data obtaining module 910 into customer data of 20 virtual channels.
  • the delay obtaining sub-module 922 is configured to detect the aligned word code blocks in the customer data of the 20 virtual channels demultiplexed by the demultiplexing sub-module 921, and obtain delay information of the customer data of the 20 virtual channels respectively.
  • the mapping sending sub-module 923 is configured to map the customer data of the 20 virtual channels demultiplexed by the demultiplexing sub-module 921 into 80 time slots of the ODU4, and acquire the 20 virtual channels obtained by the delay obtaining sub-module 922.
  • the delay information of the customer data is mapped to the overhead area of the ODU4 and sent.
  • mapping sending module 920 can be used to asynchronously map and transmit the client data of the 10 physical channels of the CAUI acquired by the data acquiring module 910 to the ODU4 in an n-bit interleaving manner.
  • the mapping sending module 920 can be configured to map the customer data of the 10 physical channels of the CAUI acquired by the data obtaining module 910 to the ODU 2e-10v; split the ODU 2e-10 v into 10 ODU 2 e and send the data.
  • mapping sending module 920 can be configured to map the customer data of the 10 physical channels of the CAUI acquired by the data obtaining module 910 to 10 ODU2e and send the data.
  • the receiving end can receive and map the ODUk, obtain the customer data carried by the ODUk, and delay the obtained customer data.
  • the data acquisition module 910 can also be configured to acquire 10G CBR service data of 10 physical channels independently from an Ethernet device or other devices.
  • the mapping sending module 920 is further configured to map 10G CBR service data of 10 physical channels independently obtained by the data acquiring module 910 to 10 ODU2 or ODU2e and send the data.
  • the mapping and sending module 920 is further configured to map 10G CBR service data of 10 physical channels independently obtained by the data acquiring module 910 into 80 time slots of the ODU4 and send the data.
  • the receiving end can receive and demap the ODUk, obtain the 10G CBR service data of the 10 physical channels independently supported by the ODUk, and recover the clock information of the customer data of the 10 independent 10G physical channels independently, and according to each other independently.
  • 10 10G physical channel customer data clock information is sent to 10 10G physical channel customer data.
  • transport network node in this embodiment may be the node A in the second to seventh embodiments, and the functions of the respective functional modules may be specifically implemented according to the methods in the second to seventh embodiments.
  • the transport network node in this embodiment may be the node A in the second to seventh embodiments, and the functions of the respective functional modules may be specifically implemented according to the methods in the second to seventh embodiments.
  • the OTN transmitting end does not perform delay compensation on the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the client data on the OTN.
  • a transport network node according to Embodiment 9 of the present invention may include: a receive parsing module 1010, a delay compensation module 1020, and a first sending module. 1030.
  • the receiving parsing module 1010 is configured to receive and demap the ODUk, and obtain client data of multiple channels carried by the ODUk.
  • the sending end can map the customer data to the ODUk in a plurality of manners, and the receiving and analyzing module 1010 can use the corresponding multiple methods to demap the received ODUk, which is not limited by the present invention.
  • the delay compensation module 1020 is configured to perform delay compensation on the client data of the multiple channels obtained by the receiving parsing module 1010.
  • the delay compensation module 1020 may be specifically configured to receive multiple physics obtained by the parsing module 1010 when the client data of the multiple channels obtained by the parsing module 1010 is customer data of multiple physical channels.
  • the customer data of the channel is demultiplexed into customer data of multiple virtual channels; detecting the aligned word blocks in the customer data of the plurality of virtual channels demultiplexed, respectively obtaining delay information of the customer data of the plurality of virtual channels; According to the obtained delay information of the customer data of the plurality of virtual channels, delay compensation is performed on the customer data of the plurality of virtual channels that are demultiplexed.
  • the delay information of the customer data of the multiple virtual channels is respectively acquired; the delay of the customer data according to the acquired multiple virtual channels The information is delayed by the customer data of the plurality of virtual channels obtained by the receiving parsing module 1010.
  • the first sending module 1030 is configured to send the delay compensation module 1020 to perform customer data after delay compensation.
  • the receiving and parsing module 1010 can be used to receive and demap the ODU4, and obtain the client data of 20 virtual channels and the overhead area of the ODU4 carried by the 80 time slots of the ODU4. Delay information of customer data carrying 20 virtual channels.
  • the delay compensation module 1020 can include: The delay compensation sub-module 1023 is configured to perform delay compensation on the customer data of the 20 virtual channels obtained by the receiving parsing sub-module 1010 according to the delay information of the customer data of the 20 virtual channels obtained by the receiving parsing module 1010.
  • the receiving parsing module 1010 can be configured to receive and demap the ODU4 to obtain customer data of 10 physical channels of the CAUI carried by the ODU4.
  • the receiving parsing module may be configured to receive and demap 10 ODU2e, and obtain customer data of 10 physical channels of the CAUI carried by 10 ODU2e.
  • the delay compensation module 1020 may include: a demultiplexing submodule 1021, a delay acquisition submodule 1022, and a delay compensation submodule 1023.
  • the demultiplexing sub-module 1021 is configured to demultiplex the customer data of the 10 physical channels of the CAUI obtained by the receiving parsing module 1010 into customer data of 20 virtual channels.
  • the delay obtaining sub-module 1022 is configured to detect the aligned word code blocks in the customer data of the 20 virtual channels demultiplexed by the demultiplexing sub-module 1021, and obtain the delay time delay of the customer data of the 20 virtual channels respectively.
  • the compensation sub-module 1023 is configured to perform delay compensation on the obtained customer data of the 20 virtual channels according to the delay information of the customer data of the 20 virtual channels obtained by the delay acquisition sub-module 1022.
  • the first sending module 1030 can multiplex the customer data of the 20 virtual channels after the delay compensation sub-module 1023 to delay compensation into the customer data of the 10 physical channels of the CAUI and send the data.
  • the receiving parsing module 1010 is further configured to receive and demap the ODUk to obtain customer data of 10 10G physical channels independently of each other in the ODUk 7.
  • the transport network node can also include:
  • the second sending module 1040 is configured to recover the clock information of the customer data of the 10 10G physical channels independently obtained by the receiving parsing module 1010, and send 10 clock information according to the customer data of the 10 10G physical channels that are independent of each other. Customer data for 10G physical channels.
  • transport network node in this embodiment may be the node B in the second to seventh embodiments, and the functions of the respective functional modules may be specifically implemented according to the methods in the second to seventh embodiments.
  • the transport network node in this embodiment may be the node B in the second to seventh embodiments, and the functions of the respective functional modules may be specifically implemented according to the methods in the second to seventh embodiments.
  • the OTN transmitting end does not perform delay compensation on the customer data, and the OTN receiving end delays the customer data to cancel the customer data.
  • the delay caused by the transmission on the OTN can relatively improve the reliability of the transmission of the customer data; at the same time, the complexity of the data processing of the OTN sender is relatively reduced; and the processing of the client data transmission is integrated as a whole.
  • a communication system is further provided in the embodiment of the present invention.
  • a communication system according to Embodiment 10 of the present invention may include a first node 1110 and a second node 1120.
  • the first node 1110 and the first node 1120 are communicably connected.
  • the first node 1110 is configured to acquire customer data of multiple channels; map the acquired customer data of the multiple channels to the ODUk and send the data.
  • the second node 1120 is configured to receive and demap the ODUk, obtain client data of multiple channels carried by the ODUk, perform delay compensation on the obtained client data of multiple channels, and send client data after delay compensation.
  • the first node 1110 may directly map the acquired client data of multiple physical channels to the ODUk and send the data.
  • the second node may be specifically configured to receive and demap the ODUk, obtain customer data of multiple physical channels carried by the ODUk, and demultiplex the obtained customer data of the plurality of physical channels into customer data of multiple virtual channels; Deriving the delay information of the customer data of the plurality of virtual channels by using the aligned word blocks in the plurality of virtual channels of the virtual channel; demultiplexing according to the obtained delay information of the client data of the plurality of virtual channels The customer data of multiple virtual channels is compensated for delay; the customer data after delay compensation is sent.
  • the first node 1110 demultiplexes the acquired customer data of multiple physical channels into client data of multiple virtual channels, and maps to the ODUk and sends the data.
  • the second node 1020 may be specifically configured to: receive and demap the ODUk, obtain client data of multiple virtual channels carried by the ODUk, and obtain delay information of customer data of multiple virtual channels respectively; according to the obtained multiple virtual channel clients Delay information of the data, delay compensation for the obtained customer data of multiple virtual channels; send customer data after delay compensation.
  • the first node 1110 and the second node 1120 are used to transmit 100GE services.
  • the first node 1110 can be used to obtain customer data of 10 physical channels of the CAUI; 10 physical channels to be acquired.
  • the customer data is demultiplexed into 20 virtual channel customer data; the alignment word block in the customer data of 20 virtual channels is detected, and 20 virtual channel customer data are respectively obtained.
  • the delay information of the 20 virtual channels is mapped to the 80 time slots of the ODU4, and the delay information of the customer data of the 20 virtual channels is mapped to the overhead area of the ODU4 and transmitted.
  • the second node 1120 may be specifically configured to: receive and demap the ODU4, obtain client data of 20 virtual channels carried by 80 time slots of the ODU4, and delay time of customer data of 20 virtual channels of the ODU4 overhead area 7
  • the first node 1110 may be specifically configured to obtain customer data of 10 physical channels of the CAUI; map the acquired customer data of the 10 physical channels to the ODU4 and send the data.
  • the second node 1120 may be specifically configured to: receive and demap the ODU4, and obtain the ODU4 bearer.
  • the first node 1110 may be specifically configured to: obtain customer data of 10 physical channels of the CAUI; map customer data of the obtained 10 physical channels to the ODU2e-10v; and split the ODU2e-10v into 10 ODU2e and sent.
  • the second node 1120 is specifically configured to receive and demap 10 ODU2e, obtain customer data of 10 physical channels of the CAUI carried by 10 ODU2e, and demultiplex the obtained customer data of 10 physical channels into 20 virtual Customer data of the channel; detecting the aligned word blocks in the customer data of the 20 virtual channels, respectively obtaining delay information of the customer data of 20 virtual channels; according to the obtained delay information of the customer data of the 20 virtual channels, The customer data of the obtained 20 virtual channels is subjected to delay compensation; the customer data of the 20 virtual channels after compensation is multiplexed into customer data of 10 physical channels of the CAUI and transmitted.
  • the first node 1110 may be specifically configured to: obtain customer data of 10 physical channels of the CAUI; map customer data of the obtained 10 physical channels to 10 ODU2e and send the data.
  • the second node 1120 is specifically configured to receive and demap 10 ODU2e, and obtain 10 ODU2e carries customer data of 10 physical channels of CAUI respectively; demultiplexes customer data of 10 physical channels obtained into customer data of 20 virtual channels; detects alignment code blocks in customer data of 20 virtual channels, Obtain delay information of customer data of 20 virtual channels respectively; delay compensation of customer data of 20 virtual channels obtained according to the obtained delay information of customer data of 20 virtual channels; 20 after compensation The customer data of the virtual channel is reused and transmitted to the customer data of the 10 physical channels of the CAUI.
  • the first node 1110 may be configured to acquire customer data of 10 10G physical channels that are independent of each other; and map the acquired customer data of the 10 physical channels to the ODUk and send the data.
  • the second node 1120 is further configured to receive and demap the ODUk, obtain customer data of 10 independent 10G physical channels carried by the ODUk, and recover clock information of the customer data of the obtained 10 10G physical channels respectively, and 10 10G physical channel customer data is sent according to the clock information of the customer data of 10 10G physical channels.
  • first node 1110 in this embodiment may be the node A in the second to seventh embodiments
  • second node 1120 in this embodiment may be the node B in the second embodiment.
  • the functions of a node 1110 and the second node 1120 can be specifically implemented according to the methods in the second to seventh embodiments. For the specific implementation process, reference may be made to the related descriptions in the second to seventh embodiments, and details are not described herein again.
  • the OTN transmitting end does not perform delay compensation on the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay caused by the transmission of the client data on the OTN.
  • the reliability of the transmission of the customer data can be relatively improved; at the same time, the complexity of the data processing of the OTN sender is relatively reduced; and the processing of the client data transmission is integrated as a whole.
  • an embodiment of the present invention further provides another communication system, including a first node 1210 and a second node 1220.
  • the first node 1210 includes: a receiving module 1211, a delay obtaining module 1212, and a mapping sending module 1213.
  • the second node 1220 includes: a receiving demapping module 1221, a delay compensation module 1222, and a transmitting module 1223.
  • the receiving module 1211 includes: a data obtaining sub-module 12111 and a de-multiplexing sub-module 12112.
  • the data acquisition sub-module is configured to receive customer data of 10 physical channels of the CAUI.
  • the demultiplexing sub-module 12112 demultiplexes customer data of 10 physical channels of the CAUI into customer data of 20 virtual channels.
  • the delay obtaining module 1212 is configured to detect an aligned block of code in the client data of each virtual channel to obtain delay information of each virtual channel.
  • the mapping sending module 1213 is configured to perform channel mapping on the customer data of the 20 virtual channels, each virtual channel data is mapped to 4 time slots of the ODU4, and the delay information of the 20 virtual channels is mapped to the overhead area of the ODU4. .
  • the receiving demapping module 1221 is configured to receive and de-map the customer data of the 20 virtual channels carried by the 80 time slots of the ODU4, and extract the delay information of the customer data of the 20 virtual channels carried by the ODU4 overhead area.
  • the delay compensation module 1222 is configured to delay the customer data of the 20 virtual channels according to the delay information of the customer data of the 20 virtual channels; and repeat the customer data bits of the 20 virtual channels after the delay compensation Use customer data for 10 physical channels of CAUI.
  • the sending module 1223 is configured to send the customer data of the 10 physical channels of the CAUI that the delay compensation module 1222 bits are multiplexed into.
  • an embodiment of the present invention further provides another communication system, including a transmitting device 1310 and a receiving device 1320.
  • the sending device 1310 includes: a receiving module 1311 and a mapping sending module 1312.
  • the receiving device 1320 includes: a receiving demapping module 1321, a delay compensation module 1322, and a transmitting module 1323.
  • the receiving module 1311 is configured to receive customer data of 10 physical channels of the CAUI.
  • the mapping sending module 1322 is configured to map customer data of 10 physical channels of the CAUI to 80 slots of the ODU4 and send the same.
  • the receiving demapping module 1321 is configured to receive and de-map the client data of the 10 physical channels of the CAUI carried by the 80 slots of the ODU4.
  • the delay compensation module 1322 is configured to demultiplex customer data of 10 physical channels of the CAUI into customer data of 20 virtual channels, and detect alignment code blocks in the client data of each virtual channel to obtain each virtual channel. Delay information of 20 customer data of 20 virtual channels according to delay information of customer data of 20 virtual channels; multiplexing customer data bits of 20 virtual channels after delay compensation into CAUI 10 Customer data for each physical channel.
  • the sending module 1323 is configured to send client data of 10 physical channels of the CAUI into which the delay compensation module 1222 is multiplexed.
  • the embodiment of the present invention further provides another schematic diagram of an implementation manner of transmitting client data, and the processing steps of each module at the sending end are as follows:
  • the data receiving module receives the 100GE CAUI interface data.
  • the multi-channel delay monitoring module converts the 100GE CAUI data into 100GE virtual channel data, detects the alignment block on each virtual channel to obtain the delay information between the virtual channels, and sends the delay information to the mapping. Module.
  • the mapping module converts the CAUI interface data into 100GE virtual channel data for sub-channel mapping, and each virtual channel data is mapped to 4 time slots of the OPU4.
  • the embodiment of the present invention further provides another schematic diagram of an implementation manner of transmitting client data, and the processing steps of each module at the receiving end are as follows:
  • the demapping module demaps the 100GE client data from the ODU4, and extracts the delay information delay compensation module, performs 100GE delay compensation according to the delay compensation information, and performs bit multiplexing on the virtual channel client data to recover the CAUI interface data.
  • Send module send 100GE CAUI interface data.
  • the OTN transmitting end does not delay the customer data, and the OTN receiving end delays the customer data, which can eliminate the delay that the customer data may be transmitted on the OTN. , can relatively improve the reliability of the transmission of customer data; at the same time relatively reduce the complexity of data processing at the OTN sender; from the overall process of customer data transfer.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, disk or CD, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention porte sur un procédé, un dispositif et un système de communication pour transmettre des données de client, le procédé de transmission de données de client comprenant : la réception et l'extraction de l'unité de données de canal optique k, l'obtention des données de client de plusieurs canaux transportés par l'unité de données de canal optique (210), l'exécution de la compensation du temps de propagation pour les données de client obtenues de plusieurs canaux (220), la transmission des données de client à temps de propagation compensé (230). Dans le mode de réalisation de la présente invention, l'émetteur OTN n'effectue pas la compensation du temps de propagation pour les données de client, alors que le récepteur OTN effectue la compensation du temps de propagation pour les données de client, ce qui permet d'éliminer le temps de propagation provoqué par la transmission des données de client dans le réseau de transport optique (OTN), et d'améliorer relativement la fiabilité de transmission des données de client, tout en permettant de réduire relativement la complexité du traitement de données dans l'émetteur OTN.
PCT/CN2009/072002 2009-05-26 2009-05-26 Procédé, dispositif et système de communication pour transmettre des données de client WO2010135864A1 (fr)

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CN200980000540.7A CN101981831B (zh) 2009-05-26 2009-05-26 传送客户数据的方法、设备及通信系统
PCT/CN2009/072002 WO2010135864A1 (fr) 2009-05-26 2009-05-26 Procédé, dispositif et système de communication pour transmettre des données de client

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