WO2010111958A1 - 一种业务数据发送、接收的方法和装置 - Google Patents
一种业务数据发送、接收的方法和装置 Download PDFInfo
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- WO2010111958A1 WO2010111958A1 PCT/CN2010/071490 CN2010071490W WO2010111958A1 WO 2010111958 A1 WO2010111958 A1 WO 2010111958A1 CN 2010071490 W CN2010071490 W CN 2010071490W WO 2010111958 A1 WO2010111958 A1 WO 2010111958A1
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- Prior art keywords
- channel
- data channel
- scheduling
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Classifications
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- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving service data.
- OTN Optical Transport Network
- OAM Operaation Administration and Maintenance
- TCM Tudem Connection Monitoring
- out-of-band FEC Forward Error Correction
- OTN is a technology for networking, scheduling, and transmission based on large granular bandwidth.
- the minimum granularity of ODUk (Optical Channel Data Unit-k) in OTN is ODU0, corresponding to The smallest particle of the OPUk (Optical Channel Payload Unit-k) is OPU0.
- the rates corresponding to OPU0, 0PU1, OPU2, and OPU3 already defined in G.709 are 1.238954 Gbits/Sec, 2.488320 Gbits/Sec, 9.953280 Gbits/Se, and 39.813120 Gbits/Sec, respectively.
- the OPUk is divided into a plurality of fixed sub-channels according to an agreement or according to a certain protocol. For example, OPU1 can be divided into 32 time slots, and each time slot is composed of 119 columns and constitutes 77.76 Mbit. The channel of the /S rate, for which traffic data below this rate is padded to this rate; for traffic data above this rate, multiple channels are bound to provide an integer multiple of bandwidth.
- the above method using the prior art has the following problems:
- the subchannel has a fixed bandwidth and must be an integer multiple of 77.76 Mbit/Sec; the scheduling of smaller particles (for example, 2 Mbit/Sec) has a problem of wasted bandwidth or difficulty in scheduling;
- the operation is complicated, and it cannot adapt to the flexible and fast bandwidth adjustment capability of future data service requirements, nor can it adapt to future unknown rate services.
- Embodiments of the present invention provide a method and apparatus for transmitting and receiving service data, which can solve the problem that a network system cannot carry an arbitrary rate service.
- An embodiment of the present invention provides a method for sending service data, including:
- the ODUk frame After completing the framing of the ODUk frame, the ODUk frame is sent to the destination address through the OTN line.
- An embodiment of the present invention provides a method for receiving service data, including:
- ODUk frame Receiving an ODUk frame, where the ODUk frame includes at least one flexible data channel;
- An embodiment of the present invention provides a data device, including:
- the sending unit is configured to send the ODUk frame to the destination address through the OTN line after completing the framing of the ODUk frame.
- An embodiment of the present invention further provides another data device, including:
- a receiving unit configured to receive an ODUk frame, where the ODUk frame includes at least one elastic data channel.
- a scheduling unit configured to schedule the at least one elastic data channel to a corresponding destination port according to the scheduling control information corresponding to the at least one elastic data channel
- a recovery unit configured to recover service data in the at least one elastic data channel in the destination port.
- the transmitting end may schedule each elastic data channel to an ODUk frame in the corresponding destination port according to scheduling control information corresponding to each elastic data channel;
- the receiving end can schedule the elastic data channel to the corresponding destination port according to the scheduling control information corresponding to each elastic data channel, thereby recovering the service data in the elastic data channel, and the bandwidth of the elastic data channel is variable, thereby realizing
- the bearer problem at any rate provides flexible and fast bandwidth adjustment.
- FIG. 1 is a flowchart of a method for transmitting service data according to Embodiment 1 of the present invention
- FIG. 2 is a flowchart of a method for receiving service data according to Embodiment 2 of the present invention
- FIG. 3 is a flowchart of a method for transmitting service data according to Embodiment 3 of the present invention.
- FIG. 4 is a schematic diagram of scheduling an elastic data channel according to Embodiment 3 of the present invention.
- FIG. 5 is a schematic diagram of Embodiment 3 of the present invention.
- FIG. 6 is a schematic diagram of implementation of an embodiment 3 of the present invention in an OTU1 frame
- FIG. 7 is a schematic diagram of scheduling an elastic data channel according to Embodiment 4 of the present invention
- FIG. 8 is a schematic diagram of implementation of an embodiment 5 of the present invention in an OTU1 frame
- FIG. 9 is a schematic diagram of implementation of an embodiment 6 of the present invention in an OTU1 frame
- FIG. 10 is a schematic diagram of a data device according to an embodiment of the present invention.
- FIG. 11 is a schematic diagram of a scheduling unit in the embodiment shown in FIG. 10;
- FIG. 12 is a schematic diagram of another data device according to an embodiment of the present invention.
- the method for transmitting service data in this embodiment may include the following steps: S10K receives at least one flexible data channel that is adapted to service data.
- Service data can be encapsulated and enter the flexible data channel. It can be GPON (Gigabit Passive Optical Network), GFP-T (Generic Framing Procedure-Transparent), GFP-F. (Generic Framing Procedure-Framing), GMP (Generic Mapping Procedure), HDLC (High-Level Data Link Control), or other custom methods Package.
- the service data can also be transmitted directly and transparently.
- the service data can be STM-N (Synchronous Transmission Module level n), OTUk (Optical Channel Transport Unit k), and FC (Fiber Channel). Channel) and any customer-defined data streams, etc.
- An elastic data channel is a physical carrier that carries service data and can only transmit service data or simultaneously transmit elastic data channel overhead.
- the at least one flexible data channel is separately scheduled to the ODUk frame in the corresponding destination port according to the scheduling control information corresponding to the at least one elastic data channel.
- the scheduling control information may be carried in an ODUk data frame, or may be scheduled.
- the data device on the operation is statically configured.
- the method for sending service data can schedule each elastic data channel to an ODUk frame in a corresponding destination port according to scheduling control information corresponding to each elastic data channel, so that the receiving end can be configured according to each elastic data channel.
- the corresponding scheduling control information schedules the elastic data channel to the corresponding destination port to recover the service data in the elastic data channel.
- the bandwidth of the elastic data channel is variable, thereby realizing the bearer problem at an arbitrary rate, providing flexible and fast Bandwidth adjustment capability.
- the method for receiving service data may include the following steps: S20K receives an ODUk frame, and the ODUk frame includes at least one flexible data channel. S202. Dispatched the at least one elastic data channel to a corresponding destination port according to scheduling control information corresponding to the at least one elastic data channel.
- the receiving end may schedule the elastic data channel to the corresponding destination port according to the scheduling control information corresponding to each elastic data channel, thereby recovering the service data in the elastic data channel,
- the flexible data channel has variable bandwidth, which enables bearer problems at any rate and provides flexible and fast bandwidth adjustment.
- FIG. 3 it is a schematic flowchart of a method for transmitting service data according to this embodiment.
- This embodiment may include the following steps:
- the S30K adapts the service data to the corresponding flexible data channel.
- the location and bandwidth of each resilient data channel may be determined as needed, such as rate requirements for traffic data and/or bandwidth allocation policies.
- the size of each elastic data channel can be adjusted according to actual needs. For example, the size of each channel can be divided into the same or different bandwidths.
- the bandwidth of the elastic data channel can be inconsistent, the service data required by different rates and bandwidths can be adapted to the appropriate flexible data channel according to actual conditions.
- channel overhead can also be added to each of the flexible data channels.
- the channel management information related to the service data may be added to each flexible data channel, or the error data or the verification data of the service data obtained after detecting the service data may be added to the flexible data channel.
- the service data in each flexible data channel can be encapsulated, such as GPON, GFP-T, GFP-F, GMP, HDLC or other custom methods.
- the service data in each flexible data channel can also be directly transparently transmitted without encapsulation.
- the received elastic data channels may be sent directly through the branch or through the ODUk virtual frame in the branch.
- TC1, TC2, and TC3 represent the elastic data channel 1, the elastic data channel 2, and the elastic data channel 3, respectively.
- Case A sends the elastic data channel TC2 directly through the port of port n
- case B sends the ODUk virtual frame through the branch of port n.
- Only the TC2 is included in the virtual frame of the ODUk, and there is no other frame information.
- the frame header of the virtual frame needs to be aligned with the ODUk frame in the port 1.
- the elastic data channel TC2 needs to be sent to the ODUk frame sent by port 1.
- the scheduling control information may include port information and channel information.
- the port information includes: a source port corresponding to the elastic data channel, and a destination port corresponding to the source port.
- Channel information packet The channel definition field in the source port corresponding to the elastic data channel and the channel definition field in the corresponding destination port.
- the channel definition field includes: a channel start time slot and a channel length; or a channel start time slot and a channel end time slot.
- the channel start time slot and channel length, or the channel start time slot and the channel end time slot can all define the position of the corresponding elastic data channel in the ODUk frame.
- the channel information may also include an identification of each flexible data channel.
- the scheduling control information of the foregoing flexible data channel may be statically configured in the data device for scheduling control, or may be carried in the ODUk frame sent in the port 1 above.
- port information or channel information can be allocated in the ODUk frame sent in port 1, or statically configured in the data device for scheduling control. If the scheduling control information is carried in the ODUk frame, the configuration may be performed by using one of the selected primary nodes in the network, and the other nodes only need to select the scheduling control information belonging to the local node from the scheduling information carried in the ODUk frame, thereby The scheduling of the elastic data channel is controlled.
- the scheduling control table generated based on the scheduling control information is as shown in Table 1.
- the channel start time slot and the channel end time slot are used to define the elastic data channel.
- TC1 in source port 1 needs to be scheduled to the channel defined by si ⁇ s2 in destination port j, and TC2 in source port n is scheduled to destination port j.
- TC3 in source port 1 is dispatched to the channel defined by s9 ⁇ slO in destination port j.
- the length between the channel start time slot and the channel end time slot of the elastic data channel in the source port should be less than or equal to the elastic data in the destination port. The length between the channel start time slot and the channel end time slot of the channel.
- the storage location may be the OPUk payload area and the frame count is the number of frames transmitted.
- the channel information may further include a channel number indication field and other check information, where the channel number indication field is used to indicate the total number of flexible data channels, and the field may also be used to verify the channel information.
- FIG. 5 is a schematic diagram of the OPU 1 in the embodiment.
- the channel information may include a channel number indication field and a channel definition field. As shown in FIG. 5, the channel number indication 1 and the channel number indication 2 are included. When the channel number indication 1 is in error, the channel number indication 2 can also indicate the number of elastic data channels.
- the channel definition field includes: a channel start time slot (Start Time), a channel end time slot (End Time), a checksum extension (CRC (Cyclical Redundancy Check), and EXT). ( Extend, extended)).
- the channel definition field can also include a channel start time slot and a channel length (Length), which can define an elastic data channel.
- the channel definition field may not include checksum extension information.
- Steps S305 and S304 are not limited to the above order and can be performed simultaneously.
- FIG. 6 is a schematic diagram showing the implementation of an embodiment of the present invention in an OTU1 frame.
- the channel number indication field and the channel definition field are placed in the payload of OPU1.
- a new PSI Paymentload Structure Identifier
- a new PSI Payload Structure Identifier
- the channel information is transmitted through the payload of the OPU1, the length of the channel information is variable, and the correctness of the channel information can be ensured by repeated transmission and verification.
- the receiving end can directly obtain the complete channel information from the payload of the OPU1, thereby generating a corresponding scheduling control table according to the channel information and the port information, and scheduling each elastic data channel to the destination. In the port, and can recover the business data in each flexible data channel.
- the elastic data channel in the received ODUk frame can be re-scheduled and forwarded to other destinations. As can be seen from FIG.
- each elastic data channel can be scheduled to be in port 1 and port n according to the above method. And recover the business data in the elastic data channel from the corresponding port.
- the identifier is filled in the corresponding elastic data channel, thereby preventing error diffusion and facilitating detection by the receiving device. And alarm handling.
- the OPUk frame by carrying multiple flexible data channels and corresponding channel information and/or port information in the payload of the OPUk, all channel information and/or port information can be transmitted through the OPUk frame, and the OTN network can be implemented arbitrarily.
- the rate bearer problem provides flexible and fast bandwidth adjustment. This method is suitable for fast elastic data channel rate adjustment, and the adjustment rate can be consistent with the OTU frame rate.
- the elastic data channel in the OPUk can carry a lower rate OTUn frame, where n ⁇ k.
- an elastic data channel in OPU3 can carry OTU1 or OTU2 frame.
- embodiments of the present invention are capable of carrying bearers for small bandwidth traffic or any rate bandwidth.
- the difference between this embodiment and the third embodiment is that the scheduling of the elastic data channels is performed in different ODUk frames.
- the ODUk frame sent by source port 1 contains multiple flexible data channels, such as TC1, TC2, and TC3.
- TC1, TC2, and TC3 are scheduled to the ODUk in destination port m
- TC2 is scheduled to the ODUk in destination port n.
- the scheduling control table 2 may be generated according to the statically configured scheduling control information or the scheduling control information carried in the ODUk frame sent by the source port 1.
- each elastic data channel can be scheduled into the OPUk payload of the corresponding destination port.
- the port m and the port n on the right side can be used as the source port, and the port 1 on the left side is used as the destination port.
- the method of the embodiment of the present invention can also be implemented in the port m and the port n.
- the flexible data channel is scheduled into the ODUk frame in port 1.
- the bearer for a small bandwidth service or an arbitrary rate bandwidth can be implemented by using multiple flexible data channels in the ODUk frame.
- Embodiment 5 The difference between this embodiment and the first embodiment is that a signaling channel is established in the overhead of the OPUk for transmitting scheduling control information, and specifically, channel information and/or port information can be transmitted.
- FIG. 8 is a schematic diagram of implementation of the present embodiment in an OTU1 frame.
- channel information and/or port information can be transmitted through various signaling channels in the OPUk overhead (OPUk Overhead), such as Dl, D2, ... D7.
- OPUk Overhead OPUk Overhead
- Channel information and/or port information are encapsulated and transmitted, for example, by HDLC, GFP encapsulation, etc., and the receiver can obtain complete channel information and/or port information after being encapsulated.
- the correctness of the channel information and/or the port information is ensured by the signaling channel, and the method of the embodiment does not occupy the payload bandwidth of the OPUk, thereby improving the bandwidth efficiency.
- channel information and/or port information may be directly transmitted through one or more OPUk subframes in the overhead of the OPUk.
- This method does not occupy the OPUk payload bandwidth, and does not need to encapsulate and decapsulate channel information and/or port information, and the processing is simple.
- the solution of this embodiment can be divided into multiple segments by using the channel information and/or the port information in the OPUk payload, and frame alignment field in the OTUk frame alignment overhead.
- the segment in the frame is identified; the receiving end can determine the segment of the channel information and/or port information received, and recover the complete channel information and/or port information according to the frame alignment field.
- the method of this embodiment can reduce the bandwidth occupancy of channel information and/or port information in the OPUk payload, and increase the rate of bandwidth adjustment.
- the embodiment of the present invention may further transmit channel information and/or port information by encapsulating (for example, HDLC, GFP, etc.) in the overhead GCC (Generic Communication Channel) of the OTUk; It can recover complete channel information and/or port information after receiving the data frame, and generate a scheduling control table according to the channel information and/or the port information, and schedule the elastic data channel in each port, thereby obtaining the target of the iM. Business data in an elastic data channel.
- the method for transmitting and receiving service data provided by the embodiments of the present invention can be used not only in the OTN system but also other systems having an MXN block frame structure, such as SDH (Synchronous Digital Hierarchy)/MSTP (MultiService Transport Platform).
- an embodiment of the present invention further provides a data device, including:
- the receiving unit 101 is configured to receive at least one elastic data channel that is adapted to the service data, and the scheduling unit 102 is configured to separately schedule the at least one elastic data channel according to the scheduling control information corresponding to the at least one elastic data channel Corresponding to the ODUk frame in the destination port;
- the sending unit 103 is configured to send the ODUk frame to the destination address through the OTN line after completing the framing of the ODUk frame.
- the foregoing scheduling unit 102 may include: a control table generating module 1021, a searching module 1022, and a channel scheduling module 1023.
- the control table generating module 1021 is configured to generate a scheduling control table according to the scheduling control information corresponding to the at least one elastic data channel.
- the searching module 1022 is configured to search, from the scheduling control table generated by the control table generating module 1021, a destination port corresponding to the at least one elastic data channel, and a channel definition field in the corresponding destination port;
- the channel scheduling module 1023 is configured to schedule the at least one flexible data channel to the corresponding destination port according to the information found by the searching module 1022.
- an embodiment of the present invention further provides another data device, including: a receiving unit 121, configured to receive an ODUk frame, where the ODUk frame includes at least one flexible data channel;
- the scheduling unit 122 is configured to schedule the at least one elastic data channel to the corresponding destination port according to the scheduling control information corresponding to the at least one elastic data channel;
- the recovery unit 123 is configured to recover the service data in the at least one flexible data channel in the destination port.
- the scheduling unit 122 may include: a control table generating module, a searching module, and a channel scheduling module.
- a schematic diagram of the structure of the scheduling unit 122 can be referred to the scheduling unit 102 shown in FIG.
- the control table generating module is configured to generate a scheduling control table according to the scheduling control information corresponding to the at least one elastic data channel;
- the searching module is configured to search, from the scheduling control table generated by the control table generating module, a destination port corresponding to the at least one elastic data channel, and a channel definition field in the corresponding destination port;
- the channel scheduling module is configured to schedule the at least one elastic data channel to the corresponding destination port according to the information that is found by the searching module.
- the scheduling control information includes: port information and channel information.
- the port information includes: a source port corresponding to the at least one elastic data channel, and a destination port corresponding to the source port;
- the channel information includes: a channel definition in a source port corresponding to the at least one elastic data channel a field, a channel definition field in the corresponding destination port, where the channel definition field includes: a channel start time slot and a channel length; or a channel start time slot and a channel end time slot.
- the scheduling control information may be carried in the ODUk data frame, or may be statically configured on the data device.
- the device for transmitting and receiving service data provided by the embodiment of the present invention may perform service data transmission and reception in combination with the embodiments of the foregoing method for transmitting and receiving service data.
- the apparatus for transmitting and receiving service data may, for the transmitting end, schedule each elastic data channel to an ODUk frame in the corresponding destination port according to the scheduling control information corresponding to each elastic data channel; , can be controlled according to the scheduling of each elastic data channel
- the information is used to schedule the elastic data channel to the corresponding destination port, so that the service data in the elastic data channel can be recovered. Because the bandwidth of the elastic data channel is variable, the bearer problem at any rate is realized, and flexible and fast bandwidth adjustment is provided. ability.
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Abstract
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10758060A EP2388964A4 (en) | 2009-04-01 | 2010-04-01 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING SERVICE DATA |
IN3524KON2011 IN2011KN03524A (zh) | 2009-04-01 | 2010-04-01 | |
AU2010230712A AU2010230712A1 (en) | 2009-04-01 | 2010-04-01 | Method and Device for Sending Data and Receiving Service Data |
US13/226,232 US20110318001A1 (en) | 2009-04-01 | 2011-09-06 | Method and device for sending and receiving service data |
Applications Claiming Priority (2)
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CN200910131493A CN101854220A (zh) | 2009-04-01 | 2009-04-01 | 一种业务数据发送、接收的方法和装置 |
CN200910131493.1 | 2009-04-01 |
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US13/226,232 Continuation US20110318001A1 (en) | 2009-04-01 | 2011-09-06 | Method and device for sending and receiving service data |
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WO2010111958A1 true WO2010111958A1 (zh) | 2010-10-07 |
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PCT/CN2010/071490 WO2010111958A1 (zh) | 2009-04-01 | 2010-04-01 | 一种业务数据发送、接收的方法和装置 |
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US (1) | US20110318001A1 (zh) |
EP (1) | EP2388964A4 (zh) |
CN (1) | CN101854220A (zh) |
AU (1) | AU2010230712A1 (zh) |
IN (1) | IN2011KN03524A (zh) |
WO (1) | WO2010111958A1 (zh) |
Cited By (1)
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US9531477B2 (en) | 2012-07-30 | 2016-12-27 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting and receiving client signal in optical transport network |
Families Citing this family (7)
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CN102630384B (zh) * | 2011-12-07 | 2016-03-09 | 华为技术有限公司 | 一种在光传送网中实现业务传送的方法及实现该方法的设备和系统 |
CN104066017B (zh) * | 2013-03-21 | 2018-10-23 | 中兴通讯股份有限公司 | 设备单元、节点设备、隧道带宽调整的方法和系统 |
CN103532740A (zh) * | 2013-09-24 | 2014-01-22 | 瑞斯康达科技发展股份有限公司 | 实现远程管理的方法、系统及gcc开销处理方法、装置 |
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 |
US9838290B2 (en) | 2015-06-30 | 2017-12-05 | Ciena Corporation | Flexible ethernet operations, administration, and maintenance systems and methods |
CN112312184B (zh) * | 2019-07-30 | 2023-01-13 | 苏州华兴源创科技股份有限公司 | 一种视频组帧方法 |
CN111083580B (zh) * | 2019-12-09 | 2021-12-14 | 北京格林威尔科技发展有限公司 | 一种在光传输网络中对以太网链路的保护方法及装置 |
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2009
- 2009-04-01 CN CN200910131493A patent/CN101854220A/zh active Pending
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2010
- 2010-04-01 IN IN3524KON2011 patent/IN2011KN03524A/en unknown
- 2010-04-01 EP EP10758060A patent/EP2388964A4/en not_active Withdrawn
- 2010-04-01 AU AU2010230712A patent/AU2010230712A1/en not_active Abandoned
- 2010-04-01 WO PCT/CN2010/071490 patent/WO2010111958A1/zh active Application Filing
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CN1734986A (zh) * | 2004-08-11 | 2006-02-15 | 华为技术有限公司 | 光传送网中传输低速率业务信号的方法及其装置 |
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US9531477B2 (en) | 2012-07-30 | 2016-12-27 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting and receiving client signal in optical transport network |
US10256915B2 (en) | 2012-07-30 | 2019-04-09 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting and receiving client signal in optical transport network |
US10887020B2 (en) | 2012-07-30 | 2021-01-05 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting and receiving client signal in optical transport network |
US11595130B2 (en) | 2012-07-30 | 2023-02-28 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting and receiving client signal in optical transport network |
Also Published As
Publication number | Publication date |
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EP2388964A4 (en) | 2012-01-18 |
AU2010230712A1 (en) | 2011-09-29 |
US20110318001A1 (en) | 2011-12-29 |
EP2388964A1 (en) | 2011-11-23 |
IN2011KN03524A (zh) | 2015-07-10 |
CN101854220A (zh) | 2010-10-06 |
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