WO2008122218A1 - Procédé de multiplexage et de démultiplexage de service de faible débit binaire - Google Patents
Procédé de multiplexage et de démultiplexage de service de faible débit binaire Download PDFInfo
- Publication number
- WO2008122218A1 WO2008122218A1 PCT/CN2008/070402 CN2008070402W WO2008122218A1 WO 2008122218 A1 WO2008122218 A1 WO 2008122218A1 CN 2008070402 W CN2008070402 W CN 2008070402W WO 2008122218 A1 WO2008122218 A1 WO 2008122218A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- service
- low
- speed
- data
- speed service
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 238000013507 mapping Methods 0.000 claims abstract description 51
- 230000001360 synchronised effect Effects 0.000 claims description 70
- 238000012545 processing Methods 0.000 claims description 25
- 238000005538 encapsulation Methods 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 15
- 238000012795 verification Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000009432 framing Methods 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 101100518559 Homo sapiens OTUB1 gene Proteins 0.000 description 6
- 101150115940 OTU1 gene Proteins 0.000 description 6
- 102100040461 Ubiquitin thioesterase OTUB1 Human genes 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000007728 cost analysis Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 101100406673 Arabidopsis thaliana OTU3 gene Proteins 0.000 description 3
- 101100462419 Homo sapiens OTUB2 gene Proteins 0.000 description 3
- 101150046103 OTU2 gene Proteins 0.000 description 3
- 102100025914 Ubiquitin thioesterase OTUB2 Human genes 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 102100023927 Asparagine synthetase [glutamine-hydrolyzing] Human genes 0.000 description 2
- 101100380329 Homo sapiens ASNS gene Proteins 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 101100341026 Caenorhabditis elegans inx-2 gene Proteins 0.000 description 1
- 101100341029 Caenorhabditis elegans inx-3 gene Proteins 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/12—Arrangements providing for calling or supervisory signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0073—Services, e.g. multimedia, GOS, QOS
- H04J2203/0082—Interaction of SDH with non-ATM protocols
-
- 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]
- H04J3/1664—Optical Transport Network [OTN] carrying hybrid payloads, e.g. different types of packets or carrying frames and packets in the paylaod
Definitions
- the present invention relates to the field of optical communication technologies, and in particular, to a method and apparatus for multiplexing and demultiplexing low-speed services. Background technique
- Synchronous Optical Network SONET
- S SDH Synchronous Digital Hierarchy
- TDM Time Division Multiplex
- WDM Wavelength Division Multiplexing
- Optical Transport Network has a business-independent processing method compared to SONET/SDH and Wavelength Division Multiplexing (WDM), and defines a standard package structure, mapping each Kind of customer business. Therefore, the current transport network is gradually turning to OTN as the bearer layer, while providing transport services for traditional voice services and emerging broadband data services.
- WDM Wavelength Division Multiplexing
- OTUk Optical Channel Transport Unit
- the area is divided into several parts; the frame area includes a frame alignment sequence (FAS, Frame Alignment Sequence) and a multi-frame alignment sequence (MFAS, Multi-frame Alignment Sequence), where the OPUk OH main
- FAS Frame Alignment Sequence
- MFAS Multi-frame Alignment Sequence
- the OTN standard defines two mapping modes for the continuous bit rate (CBR) service, the bit synchronization mapping mode and the asynchronous mapping mode.
- the asynchronous mapping mainly processes the positive and negative adjustments (that is, the transmission rate of the client service and the OTN frame is allowed). There are certain deviations, positive and negative adjustments are used to adapt to such deviations), which is completely transparent to the customer's business.
- the OTN defines three rate frame signals, namely OPU1, ODU1 and OTUl at the 2.5G rate level, OPU2, ODU2 and OTU2 at the 10G rate level, and OPU3, ODU3 and OTU3 at the 40G rate level.
- OPU1, ODU1 and OTUl at the 2.5G rate level
- OPU2, ODU2 and OTU2 at the 10G rate level
- OPU3, ODU3 and OTU3 at the 40G rate level.
- the size of various OTN frames is fixed, but the transmission rate is different.
- the nominal ODU1 rate is 2.498775 Gbps
- the ODU2 rate is 10.037274 Gbps
- the ODU3 rate is 40.319219 Gbps.
- OTU type OUT Payload nominal bit rate OTU Payload bit rate tolerance
- the nominal OTU1 rate is 2.66057 Gbps
- the OTU2 rate is 10.709225 Gbps
- the OTU3 rate is 43018413. Gbps
- the OTN uses the inter-frequency interpolation multiplexing method to divide the Payload Area in the frame structure into a number of time slots, the bandwidth of each time slot is fixed, and then map each customer service to a different time slot. Medium, mapping and multiplexing of low-speed synchronous services.
- the prior art divides the OTUk frame payload area into 16 time slots, the 17th column is the time slot TS1, the 18th column is the time slot TS2, the 32nd column is the time slot TS16, and the 33rd column is timed.
- Gap TS1, etc. each time slot has a bandwidth of 155M; one or more time slots are allocated for each customer service, and each customer service is mapped into a corresponding time slot, and the speed difference between the two is determined by JC (Justification Control) Control) and adjust the opportunity overhead to achieve mapping and multiplexing of low-speed synchronous service signals.
- JC Justification Control
- the embodiments of the present invention provide a method and a device for multiplexing and demultiplexing low-speed services, so that the OTN can carry data services and multiplex and demultiplex any low-speed services.
- the embodiment of the invention provides a method for multiplexing low-speed services, including:
- Determining the type of the low-speed service if the low-speed service is a synchronous service, asynchronously mapping the synchronous service to a time slot allocated thereto;
- a low-speed service multiplexing device provided by the embodiment of the present invention includes:
- a time slot division and allocation module configured to divide an optical transport network OTN frame into multiple time slots, and allocate the multiple time slots to the low speed service according to a rate of low speed service;
- a mapping module configured to determine a type of the low-speed service, if the low-speed service is a synchronous service, asynchronously mapping the synchronous service to a time slot allocated by the time slot division and allocation module; The low-speed service performs encapsulation processing and then maps to the time slot allocated by the time slot division and allocation module.
- the low-speed service is a synchronous service, asynchronously de-mapping the time slot corresponding to the low-speed service to restore the synchronous service;
- the low-speed service is a data service, de-mapping the time slot corresponding to the low-speed service, restoring the standard encapsulated signal, and extracting the data service from the standard encapsulated signal; if the low-speed service is an unknown type
- the service de-maps the time slot corresponding to the low-speed service, restores the general-purpose encapsulated signal, and then performs decapsulation processing to obtain an unknown type of service.
- An embodiment of the present invention further provides a device for demultiplexing a low-speed service, including:
- An overhead parsing module configured to determine, according to a payload structure indication of the OTN frame, a mapping relationship between each time slot in the OTN frame and a low speed service, and determine a type of the low speed service;
- a synchronous service restoration module configured to: when the cost resolution module determines that the low-speed service is a synchronous service, perform asynchronous demapping on the time slot corresponding to the low-speed service, and restore a synchronous service;
- the cost analysis module determines that the low speed service is a number According to the service, de-mapping the time slot corresponding to the low-speed service, restoring the standard package signal, and extracting the data service from the standard package signal;
- An unknown type service restoration module configured to: when the cost resolution module determines that the low-speed service is an unknown type service, demap the time slot corresponding to the low-speed service, restore a general-purpose package signal, and then perform decapsulation processing, Get an unknown type of business.
- the OTN can implement data service bearer and hybrid service multiplexing by using time slot division and allocation, and different mapping of different types of service signals.
- the PSI analysis and corresponding solution of the OTN frame are implemented. Processing such as mapping and decapsulation can achieve demultiplexing of hybrid services.
- FIG. 1 is a structural diagram of an OTN frame in the prior art
- FIG. 2 is a schematic diagram of dividing an OTN payload area into 16 time slots to implement low-speed synchronous service multiplexing in the prior art
- FIG. 3 is a flowchart of a method for multiplexing low-speed services according to Embodiment 1 of the present invention
- FIG. 4 is a schematic diagram of slot division of an OTN frame in the embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a general encapsulation of an unknown type of low-speed service signal according to an embodiment of the present invention
- Embodiment 6 is a flowchart of a method for multiplexing low-speed services provided by Embodiment 2 of the present invention.
- FIG. 7 is a schematic diagram of a method for hybridizing and multiplexing multiple types of services to an OTN frame according to an embodiment of the present invention
- FIG. 8 is a flowchart of a method for demultiplexing low-speed services according to Embodiment 3 of the present invention
- FIG. Device structure diagram for low speed service multiplexing
- FIG. 10 is a structural diagram of an apparatus for demultiplexing low-speed services according to Embodiment 5 of the present invention. detailed description
- the low-speed service includes the synchronization service, the data service, and the like.
- the embodiment of the present invention not only implements time slot division of the OTN frame, but also maps different types of low-speed service signals into corresponding time slots for multiplexing and encapsulation into OTN frame outputs.
- the bearer of the data service, and the hybrid multiplexing of the synchronous service and the data service is realized.
- an embodiment of the present invention provides a method for multiplexing low-speed services, and adopts a method for automatically identifying a low-speed service type, which specifically includes the following steps:
- Step 101 Perform clock data recovery processing on the accessed client service signal to obtain a customer service rate.
- Step 102 The payload area in the OTN frame is equally divided into a plurality of time slots, and each customer service signal is allocated a corresponding number of time slots according to each customer service signal rate.
- All time slots have the same bandwidth, and the bandwidth of each time slot is the OTN frame payload area bandwidth divided by the number of time slots.
- There are various ways of assigning time slots to OTN frames such as using byte interleave multiplexing or sequential allocation of time slots, or arbitrarily assigning them. In this embodiment, when interleaving by byte interleave multiplexing, Gap.
- Step 103 Initially determine a service type of the customer service according to the service rate after the clock data recovery process
- the rate of synchronous services is generally 155Mbps, 622Mbps, 2.5Gbps and lOGbps, and the data service rate is also 125Mbps, 200Mbps, 266Mbps, 270Mbps, 533Mbps, 1.0625Gbps and 1.25Gbps, 2.125Gbps and so on.
- the rate can initially determine whether the service type of the customer service is a synchronous service or a data service.
- the frame header of the service signal can also be analyzed, because the frame header of the synchronization service signal has a fixed format (the fixed length F628 sequence exists at a fixed position), so according to the synchronous service framing mode, The synchronization service frame header feature is verified. If the verification is passed, the service signal can be determined to be a synchronous service, and then step 104 is performed. If the service rate is a standard data service rate, the standard coding rule specific to the data service is used. For example, the 4B/5B encoding method used in the 125 Mbps Fast Ethernet (FE) service, most other data services such as GE, FC, ESCON, and Digital Video Broadcast (DVB) are used. 8B/10B encoding mode, the service signal is encoded and verified, if the verification is passed, the service signal can be determined to be a data service, and then step 105 is performed;
- FE Fast Ethernet
- DVD Digital Video Broadcast
- Step 104 Asynchronously map the synchronous service signal to the time slot allocated thereto. Since the frequency offset of the synchronous service signal ( ⁇ 20 ppm) is within the range of the OTN asynchronous adjustment, positive and negative adjustments can be made during the mapping process. , to achieve rate matching of the synchronous service, and then perform step 107.
- the OPUk adjustment control and the adjustment opportunity cost can be used to positively and negatively adjust the rate of the synchronous service, and the specific location is specified by the MFAS, see FIG. 4, OTN.
- the rate level of the frame is 2.5G, that is, OTU1.
- the payload area of the OTU1 frame is divided into 16 slots, and the bandwidth of each slot is fixed at 155 Mbps.
- Step 105 Apply a standard encapsulation process to the data service signal, such as a High Level Data Link Control (HDLC), a generic framing procedure (GFP), etc., and complete the rate by encapsulation. Matching, mapping the data traffic signal into the time slot assigned to it, and then performing step 107.
- a standard encapsulation process such as a High Level Data Link Control (HDLC), a generic framing procedure (GFP), etc.
- Step 106 After general-purpose encapsulation of an unknown type of customer service signal, mapping to a time slot allocated thereto, and then performing step 107;
- the general encapsulation process is as follows: Referring to FIG. 5, the customer service information is written into the cache according to the service clock, and when the client data is output from the cache, the preset unified clock is used (the clock frequency is allocated to the customer service). The bandwidth is determined, for example, the bandwidth of each time slot is 155 Mbps. If 2 time slots are allocated for the customer service, the clock frequency is 311 MHz.) The client data of the specified length is read from the cache; then the frame header tag is added at the front end.
- a check digit may be added at the end of the read customer data to ensure the integrity of the customer service transmission; in addition, since the customer business clock and the output end of the unified clock are usually Inconsistent, it is also possible to fill the fixed sequence of data in the read customer data for rate adaptation.
- Step 107 Perform OTN framing and send the OTN frame to the receiving end.
- an embodiment of the present invention further provides a method for multiplexing low-speed services, and adopting users.
- the method of specifying the low-speed service type includes the following steps:
- Step 201 The user specifies a customer service type and a service rate, and the types of the customer service include a synchronous service and a data service.
- Step 202 The payload area in the OTN frame is equally divided into multiple time slots, and each customer service signal is allocated a corresponding number of time slots according to each customer service signal rate; all time slots have the same Bandwidth, the bandwidth of each time slot is the bandwidth of the OTN frame payload area divided by the number of time slots.
- There are various ways of assigning time slots to OTN frames such as using byte interleave multiplexing or sequential allocation of time slots, or arbitrarily assigning them. In this embodiment, when interleaving by byte interleave multiplexing, Gap.
- Step 203 Determine the type of the customer service. If the service type specified by the user is a synchronous service, perform step 204. If the service type specified by the user is a data service, perform step 205; if the service type specified by the user is an unknown type of service Then, step 206 is performed.
- Step 204 Asynchronously map the synchronous service signal to the time slot allocated thereto. Since the frequency offset ( ⁇ 20 ppm) of the synchronous service signal is within the range of the OTN asynchronous adjustment, positive and negative adjustments may be performed during the mapping process. , to achieve rate matching of the synchronous service, and then perform step 207.
- the OPUk adjustment control and the adjustment opportunity cost can be used to adjust the rate of the synchronous service.
- the specific location is specified by the MFAS, see Figure 4,
- the payload area of the OTU1 frame is divided into 16 slots, and the bandwidth of each slot is fixed at 155 Mbps.
- Step 205 Perform standard packet processing on the data service signal, such as HDLC, GFP, etc., perform rate matching in an encapsulation manner, and then map the data service signal into a time slot allocated thereto, and then perform step 207.
- standard packet processing on the data service signal, such as HDLC, GFP, etc.
- Step 206 After performing general encapsulation on an unknown type of client service signal, mapping to a time slot allocated thereto, and then performing step 207;
- the general package processing is as follows:
- the customer service information is written into the cache according to the service clock, and is output from the cache.
- the preset unified clock is used to read the customer data of the specified length from the cache; then the header tag is added to the front end for the receiving end to recover the customer data;
- a check digit may be added at the end of the read customer data to ensure the integrity of the customer service transmission; in addition, since the unified clock of the customer service clock and the output end is usually inconsistent, it may also be read out.
- the customer data is populated with fixed sequence data for rate adaptation.
- Step 207 Perform OTN framing, and send the OTN frame to the receiving end.
- customer service 1 is synchronous service: Synchronous transport mode (STM-4, Synchronous Transport Mode)
- customer service 2 is data service FE
- customer service 3 is unknown type 300Mbps rate service
- customer service 4 For the data service GE
- the customer service 5 is the synchronous service STM-1.
- the OPU1 payload area is divided into 16 time slots by using byte interleave multiplexing, and the bandwidth of each time slot is 155.52 Mbps ⁇ 20 ppm.
- Allocating time slots of corresponding bandwidth to each customer service for example, allocating TS5 ⁇ TS8 four time slots to STM-4, allocating TS10 to FE, allocating TS9 and TS11 to unknown services, and allocating TS1 ⁇ TS4 and TS13 ⁇ TS16 to GE
- the STM-1 is allocated TS12; then each customer service is mapped into a corresponding time slot according to the above-mentioned allocation relationship, encapsulated into an OTU1 frame and transmitted to the receiving end, thereby implementing hybrid multiplexing of low-speed services.
- the time slot mapping relationship between the customer service and the OPU1 payload area in FIG. 7 can be carried by the Payload Structure Indication (PSI) region of the OPU1, and the PSI includes 256 sequences PSI[0] ⁇ PSI[255], respectively.
- the value of MFAS is 0 ⁇ 255.
- the PSI[2] ⁇ PSI[K+1] is used to indicate the customer service port number to which each slot belongs and the corresponding customer service type (where K represents the number of slots).
- the 8 bits (bits) of PSI[i] (2 ⁇ i ⁇ K + 1) are divided into two parts, respectively indicating the customer service type and the customer service port number to which the time slot belongs.
- bit 1 ⁇ 2 is used to indicate the customer service type, 00 means synchronous service, 01 means data service, 10 means unknown service type, and bit 3 ⁇ 8 means customer service port number.
- the port number of customer service 1 is 1.
- the service is STM-4 service, and TS5 ⁇ TS8 is assigned to it.
- the value of PSI[6 Bu PSI[9] is 0x01; the port number of customer service 2 is 2.
- the service is an FE service, and TS10 is assigned to it.
- the value of PSI[11] is 0x42; the port number of customer service 3 is 3, and the service is 300Mbps.
- TS9 and TS11 are assigned to them, then the values of PSI[10] and PSI[12] are 0x83; the port number of customer service 4 is 4, and the service is GE service, which is assigned TS1 ⁇ TS4, TS13 -TS16, then the value of PSI [2 PSI[5], PSI[14 Bu PSI[17] is 0x44; the port number of customer service 5 is 5, the service is STM-1 service, and TS12 is assigned to it) The value of PSI[13] is 0x05.
- Embodiment 3 Embodiment 3
- an embodiment of the present invention further provides a method for demultiplexing a low-speed service, which specifically includes the following steps:
- Step 301 Receive an OTN frame sent by the sending end, and perform corresponding processing on the received OTN frame, including OTN fixed frame, OTUk/ODUk layer overhead processing, and obtain OTUk OH, ODUk OH, OPUk OH, payload area, FEC. , FAS and MFAS and other information.
- Step 302 Determine a mapping relationship between each time slot in the OTN frame and the customer service according to PSI[2] ⁇ PSI[K+1] in the OPUk OH (K is the number of time slots), and determine the type of the customer service.
- Step 303 Determine the customer service type. If the customer service type is the synchronous service, execute step 304. If the customer service type is the data service, go to step 305. If the client service type is the unknown type service, go to step 306.
- Step 304 Perform asynchronous demapping processing on the time slot corresponding to the customer service, restore the synchronization service, and perform related processing of the customer service, including synchronization service framing, bit width conversion, electro-optical conversion, etc., and then from the synchronization service.
- the customer service port is output and then ends.
- Step 305 De-mapping the time slot corresponding to the customer service, restoring a standard package signal, such as a GFP signal stream, and extracting a data service from the standard package, performing customer service related processing, including physical layer coding, and bit width. Transform, electro-optical conversion, etc., then output from the customer service port where the data service is located, and then ends.
- a standard package signal such as a GFP signal stream
- Step 306 Decapsulate the corresponding time slot by using a decapsulation processing method corresponding to the general-purpose package in the above embodiment, and restore the general-purpose package signal, and perform frame-decoding processing on the general-purpose package signal, that is, find the frame header mark. Determining whether the general encapsulated signal contains padding data, and if so, first removing the padding data in the general encapsulated signal, and then extracting the unknown type of service; otherwise, directly extracting the unknown type of service; and extracting the unknown type The relevant processing of the service, including bit width conversion, electro-optical conversion, etc., and then from the assignment for the unknown type of service The customer service port is output and then ends.
- the step of verifying by using the check bit at the end of the general encapsulated signal may be added. If the check passes, the step of extracting the service of the unknown type is performed; if the check fails, The steps of extracting an unknown type of business are not performed, and then the process ends.
- an embodiment of the present invention further provides a device for multiplexing low-speed services, which specifically includes:
- a time slot division and allocation module configured to divide the OTN frame into multiple time slots, and allocate multiple time slots to the low speed service according to the rate of the low speed service;
- a mapping module configured to determine a type of the low-speed service. If the low-speed service is a synchronous service, the synchronous service is asynchronously mapped to the time slot allocated by the time slot and the allocation module; otherwise, the low-speed service is encapsulated. It is then mapped into the time slot allocated by the time slot division and allocation module.
- the above mapping module may include:
- the synchronization service signal determining unit is configured to perform verification on the low-speed service according to the synchronous service framing mode according to the rate of the low-speed service, and if the verification passes, determine that the low-speed service is the synchronous service;
- the data service signal judging unit is configured to perform, according to the rate of the low-speed service, the low-speed service according to the data service coding rule, and if the verification passes, determine that the low-speed service is the data service;
- the unknown type signal judging unit is configured to determine that the low speed service is an unknown type service when the low speed service fails the synchronization service framing check and fails the data service coding rule check.
- the device for multiplexing the low-speed service may further include:
- the rate adjustment module is configured to perform positive and negative adjustment on the rate of the synchronous service by using the OPUk adjustment control and the adjustment opportunity cost in the process of the mapping module asynchronously mapping the synchronous service to the time slot and the time slot allocated by the allocation module.
- the above mapping module may include:
- a data service encapsulating unit configured to perform standard encapsulation processing of the data service on the low-speed service when the data service signal judging unit determines that the low-speed service is a data service
- a general-purpose encapsulating unit configured to: when the unknown type signal judging unit determines that the low-speed service is an unknown type of service, write the unknown type of service information into the cache according to the clock of the unknown type of service; The buffer reads the data of the specified length, and adds a header tag to the data front end.
- the rate is adapted by filling the fixed sequence of data at the end of the data.
- the above general package unit further includes:
- the parity subunit is configured to add a parity bit at the end of the read data after the universal package unit reads the data of the specified length from the buffer by using a preset clock to ensure the integrity of the low speed service transmission.
- an embodiment of the present invention further provides a device for demultiplexing a low-speed service, which specifically includes:
- an overhead parsing module configured to determine, according to a payload structure indication of the OTN frame, a mapping relationship between each time slot in the OTN frame and a low-speed service, and determine a type of the low-speed service;
- a synchronous service restoration module configured to: when the cost analysis module determines that the low-speed service is a synchronous service, perform asynchronous demapping on the time slot corresponding to the low-speed service, and restore the synchronous service;
- a data service restoration module configured to: when the cost analysis module determines that the low-speed service is a data service, de-map the time slot corresponding to the low-speed service, restore the standard package signal, and extract the data service from the standard package signal;
- An unknown type service restoration module configured to: when the cost analysis module determines that the low-speed service is an unknown type of service, demap the time slot corresponding to the low-speed service, restore the general-purpose encapsulated signal, and then perform decapsulation processing to obtain an unknown type. Business.
- the foregoing unknown type service restoration module may specifically include:
- a demapping unit configured to: when the cost resolution module determines that the low-speed service is an unknown type of service, de-mapping the time slot corresponding to the low-speed service, and restoring the general-purpose package signal;
- the above unknown type service restoration module further includes:
- a verification unit configured to perform verification by using a check bit at the end of the general-purpose encapsulated signal after the de-encapsulation unit finds the header tag, and if the check passes, triggering the de-encapsulation unit to perform the step of extracting the service of the unknown type.
- the embodiments of the present invention can be implemented by using software, such as C, C++, JAVA, Verilog or
- VHDL Very High Definition Language programming
- the corresponding software can be stored in a readable storage medium, such as a computer's hard disk, memory or FPGA (Field Programmable Gate Array).
- a readable storage medium such as a computer's hard disk, memory or FPGA (Field Programmable Gate Array).
- the embodiment of the present invention can implement the hybrid multiplexing and demultiplexing of the OTN bearer data service and the multiple low-speed services.
- the time slot is allocated to the OTN frame payload area, the number of slots cannot be limited, and the flexibility can be achieved. Maximize bandwidth utilization;
- the check digit verification method can ensure the integrity of the customer service transmission;
- the low-speed service There is no limit to the type and rate, which solves the multiplexing and demultiplexing of various types of low-speed service hybrids.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
Description
低速业务复用及解复用的方法和装置 本申请要求于 2007 年 04 月 06 日提交中国专利局、 申请号为 200710090367.7、发明名称为"低速业务复用及解复用的方法和装置"的中国 专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及光通信技术领域, 特别涉及一种低速业务复用及解复用的 方法和装置。 背景技术
同步光网络( SONET, Synchronous Optical Network ) /同步数字体系( S SDH, Synchronous Digital Hierarchy )作为成熟的传送技术, 可以满足多种 客户业务的接入、 复用、 调度、 管理及保护; 随着带宽需求的增加, 出现 了时分复用( TDM, Time Division Multiplex )和波分复用( WDM, Wavelength Division Multiplexing )技术。 在现有网络尤其是城域网环境中, 既存在传统 的语音业务, 又存在大量的数据业务, 因此需要解决混合业务的传送。
光传送网 (OTN, Optical Transport Network )相对于 SONET/SDH和 波分复用 (WDM, Wavelength Division Multiplexing ) 而言, 具有业务无关 性的处理方式, 并且定义了一种标准的封装结构, 映射各种客户业务。 因 此, 目前传送网正逐渐转向以 OTN作为承载层, 同时为传统的语音业务和 新兴的宽带数据业务提供传送服务。
参见图 1 , OTN帧为 4x4080的字节结构 (即 4行 χ4080列 ) , ΟΤΝ帧 结构包含定帧区 i或、 OTUk ( Optical Channel Transport Unit, 光通道传输单 元, k=l , 2 , 3分别对应 2.5G, 10G, 40G的速率级别) OH (开销区域)、 光通道数据单元 ODUk( Optical Channel Data Unit, k=l , 2, 3分别对应 2.5G, 10G, 40G的速率级别)OH、光通道净荷单元 OPUk( Optical Channel Payload Unit, k=l , 2, 3分别对应 2.5G, 10G, 40G的速率级别) OH、 净荷区域 ( Payload Area )、 前向错误纠正 ( FEC , Forward Error Correction ) 区域等 几部分; 定帧区域包括帧对齐序列( FAS , Frame Alignment Sequence )和复 帧对齐序列( MFAS , Multi-frame Alignment Sequence ), 其中 OPUk OH主
要用于客户业务映射和适配管理, ODUk OH信息主要用于对 OTN帧的管 理及监视, OTUk OH信息主要用于对传输段的监视。
OTN标准定义了两种对连续比特速率( CBR, Constant Bit Rate )业务 的映射方式, 比特同步映射方式和异步映射方式, 异步映射主要通过正负 调整处理(即允许客户业务和 OTN帧的传输速率存在一定偏差, 正负调整 用于适配这种偏差) 的手段来实现, 对客户业务来说是完全透明的。
OTN定义了三种速率的帧信号,分别为 2.5G速率级别的 OPUl、ODUl 和 OTUl , 10G速率级别的 OPU2、 ODU2和 OTU2 , 40G速率级别的 OPU3、 ODU3和 OTU3。 与 SONET /SDH不同, OTN各种帧的大小都是固定的, 而传输的速率却不同。
OPUk的类型和相应的速率如表 1所示。
表 1
标称的 ODU1速率为 2.498775 Gbps, ODU2速率为 10.037274 Gbps, ODU3 速率为 40.319219 Gbps
OTUk的类型和相应的速率如表 3所示。
OTU type OUT Payload nominal bit rate OTU Payload bit rate tolerance
OTU1 255/238 * 2 488 320 kbit/s
OTU2 255/237 * 9 953 280 kbit/s ±20 ppm
OTU3 255/236 * 39 813 120 kbit/s
标称的 OTU1速率为 2.66057 Gbps, OTU2速率为 10.709225 Gbps, OTU3速 率为 43018413. Gbps 目前存在一种现有技术通过间插复用方式将 OTN 帧划分成多个 TS ( Time Slot, 时隙), 可以实现多个低速同步业务的传输。 OTN釆用字节间 插复用的方式将帧结构中的净荷区域( Payload Area ) 划分成若干个时隙, 每个时隙的带宽固定, 然后将每个客户业务映射到不同的时隙中, 实现低 速同步业务的映射和复用。
参见图 2, 现有技术将 OTUk帧净荷区域划分成 16个时隙, 第 17列为 时隙 TS1 , 第 18列为时隙 TS2, 第 32列为时隙 TS16, 第 33列又为时隙 TS1等等, 每个时隙带宽为 155M; 为每个客户业务分配一个或多个时隙, 将每个客户业务映射到对应的时隙中, 两者速率差异通过 JC ( Justification Control, 调整控制)和调整机会开销进行适配, 实现低速同步业务信号的 映射和复用。 图 2中 NJO ( Negative Justification Opportunity, 负调整机会 ) 的位置是固定的, 在第 4行第 16列的位置上, PJO ( Positive Justification Opportunity, 正调整机会) 的位置是不固定的, JC (在第 16列第一行至第 三行的位置上)和调整机会字节一起, 完成对净荷区域内分配给相应时隙 的业务进行正负调整处理。
上述现有技术虽然能够实现低速同步业务映射和复用到 OTN帧, 但是 无法解决低速数据业务的承载, 如 GE ( Gigabit Ethernent, 千兆以太网)、 FC ( Fibre Channel, 光纤通道)、 FICON ( Fiber Connectivity, 光纤连接) 和 ESCON ( Enterprise Systems Connection, 企业***连接)等数据业务的 承载, 也不能实现任意低速业务的复用。 发明内容
本发明实施例提供了一种低速业务复用及解复用的方法和装置, 使得 OTN可承载数据业务以及复用解复用任意低速业务。
本发明实施例提供一种低速业务复用的方法, 包括:
将光传送网 OTN帧划分成多个时隙, 根据低速业务的速率将所述多个 时隙分配给所述低速业务;
判断所述低速业务的类型, 如果所述低速业务为同步业务, 则将所述 同步业务异步映射到为其分配的时隙中;
否则, 对所述低速业务进行封装处理, 然后映射到为其分配的时隙中。 本发明实施例提供的一种低速业务复用装置, 包括:
时隙划分及分配模块, 用于将光传送网 OTN帧划分成多个时隙, 根据 低速业务的速率将所述多个时隙分配给所述低速业务;
映射模块, 用于判断所述低速业务的类型, 如果所述低速业务为同步 业务, 则将所述同步业务异步映射到所述时隙划分及分配模块为其分配的 时隙中; 否则对所述低速业务进行封装处理, 然后映射到所述时隙划分及 分配模块为其分配的时隙中。
本发明实施例提供的一种低速业务解复用的方法, 包括:
根据光传送网 OTN帧的净荷结构指示确定所述 OTN帧中的每个时隙 与低速业务的映射关系, 并确定所述低速业务的类型;
如果所述低速业务为同步业务, 则对所述低速业务对应的时隙进行异 步解映射, 还原出同步业务;
如果所述低速业务为数据业务, 则对所述低速业务对应的时隙进行解 映射, 还原出标准封装信号, 并从所述标准封装信号中提取出数据业务; 如果所述低速业务为未知类型业务, 则对所述低速业务对应的时隙进 行解映射, 还原出通用封装信号, 然后进行解封装处理, 得到未知类型的 业务。
本发明实施例还提供一种低速业务解复用的装置, 包括:
开销解析模块, 用于根据 OTN帧的净荷结构指示确定所述 OTN帧中 的每个时隙与低速业务的映射关系, 并确定所述低速业务的类型;
同步业务还原模块, 用于当所述开销解析模块确定所述低速业务为同 步业务时, 对所述低速业务对应的时隙进行异步解映射, 还原出同步业务; 数据业务还原模块, 用于当所述开销解析模块确定所述低速业务为数
据业务时, 对所述低速业务对应的时隙进行解映射, 还原出标准封装信号, 并从所述标准封装信号中提取出数据业务;
未知类型业务还原模块, 用于当所述开销解析模块确定所述低速业务 为未知类型业务时, 对所述低速业务对应的时隙进行解映射, 还原出通用 封装信号, 然后进行解封装处理, 得到未知类型的业务。
本发明实施例通过时隙划分和分配, 以及对不同类型的业务信号进行 不同的映射, 使 OTN可以实现数据业务的承载以及混合业务的复用; 通过 对 OTN帧的 PSI的分析和相应的解映射和解封装等处理可以实现混合业务 的解复用。 附图说明
图 1是现有技术中 OTN帧的结构图;
图 2是现有技术中将 OTN净荷区域划分为 16个时隙实现低速同步业 务复用的示意图;
图 3是本发明实施例一提供的低速业务复用的方法流程图;
图 4是本发明实施例中 OTN帧时隙划分示意图;
图 5 是本发明实施例对未知类型的低速业务信号进行通用封装的结构 示意图;
图 6是本发明实施例二提供的低速业务复用的方法流程图;
图 7是本发明实施例多种类型业务混合复用到 OTN帧的示意图; 图 8是本发明实施例三提供的低速业务解复用的方法流程图; 图 9是本发明实施例四提供的低速业务复用的装置结构图;
图 10是本发明实施例五提供的低速业务解复用的装置结构图。 具体实施方式
下面结合附图和具体实施例对本发明作进一步说明, 但本发明不局限 于下面的实施例。
低速业务包括同步业务和数据业务等等, 本发明实施例通过对 OTN帧 进行时隙划分、 将不同类型的低速业务信号映射到相应的时隙中复用、 封 装成 OTN帧输出, 不仅实现了数据业务的承载, 而且实现了同步业务和数 据业务的混合复用。
实施例一
参见图 3 , 本发明实施例提供了一种低速业务复用的方法, 釆用自动识 别低速业务类型的方式, 具体包括以下步骤:
步骤 101 : 对接入的客户业务信号进行时钟数据恢复处理, 获取客户业 务速率。
步骤 102: 将 OTN帧中的净荷区域均勾地划分成多个时隙, 根据每个 客户业务信号速率, 为每个客户业务信号分配相应数量的时隙。
所有的时隙都具有相同的带宽, 每个时隙的带宽为 OTN帧净荷区域带 宽除以时隙个数。 对 OTN帧进行时隙分配的方式有多种, 如釆用字节间插 复用方式或顺序方式分配时隙, 也可以任意分配, 本实施例釆用字节间插 复用的方式分配时隙。
步骤 103:根据时钟数据恢复处理后的业务速率初步判断客户业务的业 务类型;
同步业务的速率一般有 155Mbps, 622Mbps, 2.5Gbps和 lOGbps等多 种级别, 数据业务的速率也有 125Mbps、 200Mbps, 266Mbps, 270Mbps, 533Mbps, 1.0625Gbps和 1.25Gbps、 2.125Gbps等多种级别, 因此从业务速 率可以初步判定客户业务的业务类型是同步业务, 还是数据业务。
为了进一步确认客户业务的业务类型, 还可以分析业务信号的帧头, 因为同步业务信号的帧头具有固定的格式 (在固定位置存在固定长度的 F628 序列), 因此按照同步业务定帧方式即根据同步业务帧头特征进行校 验, 如果校验通过, 则可判断该业务信号为同步业务, 然后执行步骤 104; 如果业务速率为标准的数据业务速率, 则釆用数据业务特有的标准编 码规则, 如 125Mbps的快速以太网 (FE, Fast Ethernet )业务釆用的 4B/5B 编码方式,其他大部分数据业务如 GE、 FC、 ESCON和数字视频广播( DVB, Digital Video Broadcast )等业务都釆用的 8B/10B编码方式, 对业务信号进 行编码校验, 如果校验通过, 则可判断该业务信号为数据业务, 然后执行 步骤 105;
如果客户业务既未通过上述同步业务定帧校验, 也未通过上述数据业 务编码规则校验, 则判断客户业务为未知类型的业务, 然后执行步骤 106。
步骤 104: 将同步业务信号异步映射到为其分配的时隙中, 由于同步业 务信号的频偏(±20 ppm )在 OTN异步调整的范围内, 因此在映射的过程 中, 可以进行正负调整, 实现同步业务的速率匹配, 然后执行步骤 107。
在将同步业务异步映射到为其分配的时隙的过程中, 可以利用 OPUk 调整控制和调整机会开销对同步业务的速率进行正负调整, 具***置是由 MFAS来指定的, 参见图 4, OTN帧的速率级别为 2.5G, 即 OTU1 , 图中 将 OTU1帧的净荷区域划分为 16时隙,则每个时隙的带宽固定为 155Mbps。 MFAS中利用低四位(即第 5、 6、 7和 8比特位 )来指定进行速率调整的时 隙, 如果 MFAS = 0000 (二进制 ), 则 PJO在 TS1中, 即可对时隙 1承载的 业务进行速率调整; 如果 MFAS = 0001 (二进制 ), 则 PJO在 TS2中, 即可 对时隙 2承载的业务进行速率调整。
步骤 105: 对数据业务信号釆用标准的封装处理, 如高级数据链路控制 规程(HDLC, High Level Data Link Control ), 通用成帧处理(GFP, generic framing procedure )等封装, 由封装方式完成速率匹配, 将数据业务信号映 射到为其分配的时隙中, 然后执行步骤 107。
步骤 106: 对未知类型的客户业务信号进行通用封装后, 映射到为其分 配的时隙中, 然后执行步骤 107;
通用封装的处理过程如下: 参见图 5, 按照业务时钟将客户业务信息写 入到緩存中, 从緩存中输出客户数据时, 釆用预设的统一时钟(该时钟频 率由分配给该客户业务的带宽决定, 例如, 每个时隙带宽为 155Mbps, 若 为该客户业务分配了 2个时隙, 则该时钟频率就是 311MHz )从緩存中读取 指定长度的客户数据; 然后在前端添加帧头标记, 用于接收端恢复客户数 据; 进一步地, 还可以在读取出的客户数据的末端添加校验位, 用来保证 客户业务传输的完整性; 另外, 由于客户业务时钟和输出端的统一时钟通 常不一致, 还可以在读取出的客户数据中填充固定序列的数据以进行速率 适配。
步骤 107: 执行 OTN成帧, 并将 OTN帧发送给接收端。 实施例二
参见图 6, 本发明实施例还提供了一种低速业务复用的方法, 釆用用户
指定低速业务类型的方式, 具体包括以下步骤:
步骤 201 : 用户指定客户业务类型和业务速率, 客户业务的类型包括同 步业务和数据业务等。
步骤 202: 将 OTN帧中的净荷区域均勾地划分成多个时隙, 根据每个 客户业务信号速率, 为每个客户业务信号分配相应数量的时隙; 所有的时 隙都具有相同的带宽, 每个时隙的带宽为 OTN帧净荷区域的带宽除以时隙 个数。 对 OTN帧进行时隙分配的方式有多种, 如釆用字节间插复用方式或 顺序方式分配时隙, 也可以任意分配, 本实施例釆用字节间插复用的方式 分配时隙。
步骤 203 :判断客户业务的类型,如果用户指定的业务类型为同步业务, 则执行步骤 204; 如果用户指定的业务类型为数据业务, 则执行步骤 205; 如果用户指定的业务类型为未知类型的业务, 则执行步骤 206。
步骤 204: 将同步业务信号异步映射到为其分配的时隙中, 由于同步业 务信号的频偏(±20 ppm )在 OTN异步调整的范围内, 因此在映射的过程 中, 可以进行正负调整, 实现同步业务的速率匹配, 然后执行步骤 207。
在将同步业务异步映射到为其分配的时隙的过程中, 可以利用 OPUk 调整控制和调整机会开销对同步业务的速率进行正负调整, 具***置是由 MFAS来指定的, 参见图 4, 图中将 OTU1帧的净荷区域划分为 16时隙, 则每个时隙的带宽固定为 155Mbps。 MFAS 中利用低四位(即第 5、 6、 7 和 8比特位 )来指定进行速率调整的时隙, 如果 MFAS = 0000 (二进制 ), 则 PJO在 TS1中, 即可对时隙 1承载的业务进行速率调整; 如果 MFAS = 0001 (二进制 ),则 PJO在 TS2中,即可对时隙 2承载的业务进行速率调整。
步骤 205: 对数据业务信号釆用标准的封装处理, 如 HDLC、 GFP等封 装, 由封装方式完成速率匹配, 然后将数据业务信号映射到为其分配的时 隙中, 然后执行步骤 207。
步骤 206: 对未知类型的客户业务信号进行通用封装后, 映射到为其分 配的时隙中, 然后执行步骤 207;
通用封装的处理过程如下:
参见图 5 , 按照业务时钟将客户业务信息写入到緩存中, 从緩存中输出
客户数据时, 釆用预设的统一时钟, 从緩存中读取指定长度的客户数据; 然后在前端添加帧头标记, 用于接收端恢复客户数据;
进一步地, 还可以在读取出的客户数据的末端添加校验位, 用来保证 客户业务传输的完整性; 另外, 由于客户业务时钟和输出端的统一时钟通 常不一致, 所以还可以在读取出的客户数据中填充固定序列的数据以进行 速率适配。
步骤 207: 执行 OTN成帧, 并将 OTN帧发送给接收端。
参见图 7 , 以一个具体的应用实例来说明低速业务的混合复用。 图中有 5个客户业务,客户业务 1为同步业务: 同步传输模式( STM-4 , Synchronous Transport Mode ), 客户业务 2为数据业务 FE, 客户业务 3 为未知类型的 300Mbps速率业务, 客户业务 4为数据业务 GE, 客户业务 5为同步业务 STM-1。 根据客户业务的带宽情况, 釆用字节间插复用的方式, 将 OPU1 净荷区域划分成 16个时隙,每个时隙的带宽为 155.52 Mbps ± 20ppm。给每 个客户业务分配相应带宽的时隙, 例如, 给 STM-4分配 TS5 ~ TS8四个时 隙,给 FE分配 TS10 ,给未知业务分配 TS9和 TS11 ,给 GE分配 TS1 ~ TS4 和 TS13 ~ TS16, 给 STM-1分配 TS12; 然后按照上述分配关系将每个客户 业务映射到相应的时隙中, 封装成 OTU1 帧后传输给接收端, 从而实现了 低速业务的混合复用。
图 7中客户业务与 OPU1净荷区域的时隙映射关系可以用 OPU1的净 荷结构指示 (PSI, Payload Structure Indication ) 区域承载, PSI包含 256 个序列 PSI[0] ~ PSI[255] , 分别对应于 MFAS 的值为 0 ~ 255 的情况。 用 PSI[2] ~ PSI[K+1]表示每个时隙所属的客户业务端口号以及对应的客户业 务类型 (其中 K表示时隙个数)。 将 PSI[i](2≤i≤K+l)的 8个 bit (比特位 ) 划分为两部分, 分别表示该时隙所属的客户业务类型和客户业务端口号。 例如用 bit 1~2表示客户业务类型, 00表示同步业务、 01表示数据业务、 10 表示未知业务类型; 用 bit 3~8表示客户业务端口号。 本例中客户业务 1的 端口号为 1 ,该业务为 STM-4业务,为其分配了 TS5~TS8,则 PSI[6卜 PSI[9] 的值为 0x01 ; 客户业务 2的端口号为 2 , 该业务为 FE业务, 为其分配了 TS10 ,则 PSI[11]的值为 0x42;客户业务 3的端口号为 3 ,该业务为 300Mbps
未知业务, 为其分配了 TS9、 TS11 , 则 PSI[10]和 PSI[12]的值为 0x83; 客 户业务 4 的端口号为 4 , 该业务为 GE 业务, 为其分配了 TS1~TS4、 TS13-TS16, 则 PSI[2卜 PSI[5]、 PSI[14卜 PSI[17]的值为 0x44; 客户业务 5 的端口号为 5, 该业务为 STM-1业务, 为其分配了 TS12, 则 PSI[13]的值为 0x05。 实施例三
参见图 8, 本发明实施例还提供了一种低速业务解复用的方法, 具体包 括以下步骤:
步骤 301 :接收发送端传来的 OTN帧,对接收到的 OTN帧进行相应的 处理, 包括 OTN定帧、 OTUk/ODUk层开销处理, 得到 OTUk OH、 ODUk OH、 OPUk OH, 净荷区域、 FEC、 FAS和 MFAS等信息。
步骤 302: 根据 OPUk OH中的 PSI[2] ~ PSI[K+1] ( K为时隙个数 )确 定 OTN帧中的每个时隙与客户业务的映射关系, 并确定客户业务的类型。
步骤 303: 判断客户业务类型, 如果客户业务类型为同步业务, 则执行 步骤 304; 如果客户业务类型为数据业务, 则执行步骤 305; 如果客户业务 类型为未知类型业务, 则执行步骤 306。
步骤 304: 对该客户业务对应的时隙进行异步解映射处理, 还原出同步 业务, 并经过客户业务相关处理, 包括同步业务成帧、 位宽变换、 电光转 换等, 然后从该同步业务所在的客户业务端口输出, 然后结束。
步骤 305: 对该客户业务对应的时隙进行解映射处理, 还原出标准封装 信号, 如 GFP信号流, 并从标准封装中提取出数据业务, 进行客户业务相 关处理, 包括物理层编码、 位宽变换、 电光转换等, 然后从该数据业务所 在的客户业务端口输出, 然后结束。
步骤 306: 釆用与上述实施例中通用封装相对应的解封装处理方式, 对 相应的时隙进行解映射处理, 还原出通用封装信号, 对通用封装信号进行 定帧处理, 即找到帧头标记, 判断通用封装信号中是否包含填充数据, 如 果是, 则先去掉通用封装信号中的填充数据, 然后提取出未知类型的业务; 否则, 直接提取出未知类型的业务; 并对提取出的未知类型的业务进行相 关处理, 包括位宽变换、 电光转换等, 然后从为该未知类型的业务分配的
客户业务端口输出, 然后结束。
进一步地, 在找到帧头标记后, 还可以增加利用通用封装信号末端的 校验位进行校验的步骤, 如果校验通过, 则执行提取未知类型的业务的步 骤; 如果校验未通过, 则不执行提取未知类型的业务的步骤, 然后结束。 实施例四
参见图 9 ,本发明实施例还提供了一种低速业务复用的装置,具体包括:
( 1 ) 时隙划分及分配模块, 用于将 OTN帧划分成多个时隙, 根据低 速业务的速率将多个时隙分配给低速业务;
( 2 )映射模块, 用于判断低速业务的类型,如果低速业务为同步业务, 则将同步业务异步映射到时隙划分及分配模块为其分配的时隙中; 否则对 低速业务进行封装处理, 然后映射到时隙划分及分配模块为其分配的时隙 中。
上述映射模块可以包括:
1 ) 同步业务信号判断单元, 用于根据低速业务的速率, 对低速业务按 照同步业务定帧方式进行校验, 如果校验通过, 则判定低速业务为同步业 务;
2 )数据业务信号判断单元, 用于根据低速业务的速率, 对低速业务按 照数据业务编码规则进行校验, 如果校验通过, 则判定低速业务为数据业 务;
3 )未知类型信号判断单元, 用于当低速业务未通过同步业务定帧校验 且未通过数据业务编码规则校验时, 判定低速业务为未知类型业务。
为了实现低速同步业务的透明传送, 上述低速业务复用的装置还可以 包括:
速率调整模块, 用于在映射模块将同步业务异步映射到时隙划分及分 配模块为其分配的时隙的过程中, 利用 OPUk调整控制和调整机会开销对 同步业务的速率进行正负调整。
上述映射模块可以包括:
1 )数据业务封装单元, 用于当数据业务信号判断单元判定低速业务为 数据业务时, 对低速业务进行数据业务的标准封装处理;
2 )通用封装单元, 用于当未知类型信号判断单元判定低速业务为未知 类型的业务时, 按照未知类型的业务的时钟, 将未知类型的业务信息写入 緩存中; 釆用预设的时钟从緩存中读取指定长度的数据, 在数据前端添加 帧头标记, 当未知类型的业务的时钟与预设的时钟不一致时, 通过在数据 的末端填充固定序列的数据进行速率适配。
上述通用封装单元还包括:
校验子单元, 用于当通用封装单元釆用预设的时钟从緩存中读取指定 长度的数据后, 在读取的数据末端添加校验位, 以保证低速业务传输的完 整性。
实施例五
参见图 10, 本发明实施例还提供了一种低速业务解复用的装置, 具体 包括:
( 1 )开销解析模块, 用于根据 OTN帧的净荷结构指示确定 OTN帧中 的每个时隙与低速业务的映射关系, 并确定低速业务的类型;
( 2 ) 同步业务还原模块, 用于当开销解析模块确定低速业务为同步业 务时, 对低速业务对应的时隙进行异步解映射, 还原出同步业务;
( 3 )数据业务还原模块, 用于当开销解析模块确定低速业务为数据业 务时, 对低速业务对应的时隙进行解映射, 还原出标准封装信号, 并从标 准封装信号中提取出数据业务;
( 4 )未知类型业务还原模块, 用于当开销解析模块确定低速业务为未 知类型业务时, 对低速业务对应的时隙进行解映射, 还原出通用封装信号, 然后进行解封装处理, 得到未知类型的业务。
上述未知类型业务还原模块可以具体包括:
1 )解映射单元,用于当开销解析模块确定低速业务为未知类型业务时, 对低速业务对应的时隙进行解映射, 还原出通用封装信号;
2 )解封装单元, 用于在解映射单元还原出的通用封装信号中找到帧头 标记, 并判断通用封装信号中是否包含填充数据, 如果是, 则先去掉所述 填充数据, 然后提取出未知类型的业务; 否则, 直接提取出未知类型的业 务。
上述未知类型业务还原模块还包括:
校验单元, 用于在解封装单元找到帧头标记后, 利用通用封装信号末 端的校验位进行校验, 如果校验通过, 则触发解封装单元执行提取未知类 型的业务的步骤。
本发明实施例可以利用软件实现, 如利用 C、 C++、 JAVA, Verilog或
VHDL 等语言编程实现, 相应的软件可以存储在可读取的存储介质中, 例 如, 计算机的硬盘、 内存或 FPGA ( Field Programmable Gate Array, 现场可 编程门阵列) 中。
本发明实施例可以实现 OTN承载数据业务和多种低速业务的混合复用 和解复用; 在对 OTN帧净荷区域进行时隙划分时, 可以不限定时隙个数, 具有灵活性, 可以达到带宽利用最大化; 在通用封装和通用解封装处理过 程中, 釆用校验位校验的方式, 可以保证客户业务传输的完整性; 釆用通 用封装和通用解封装处理后, 对低速业务的类型和速率没有限制, 解决了 各种类型的低速业务混合的复用和解复用。
以上所述的实施例, 只是本发明较优选的具体实施方式, 本领域的技 术人员在本发明技术方案范围内进行的通常变化和替换都应包含在本发明 的保护范围内。
Claims
1. 一种低速业务复用的方法, 其特征在于, 包括:
将光传送网 OTN帧划分成多个时隙, 根据低速业务的速率将所述多个 时隙分配给所述低速业务;
判断所述低速业务的类型, 如果所述低速业务为同步业务, 则将所述 同步业务异步映射到为其分配的时隙中;
否则, 对所述低速业务进行封装处理, 然后映射到为其分配的时隙中。
2. 根据权利要求 1所述的低速业务复用的方法, 其特征在于, 所述将 OTN帧划分成多个时隙釆用的方式包括:
间插复用方式或顺序方式。
3. 根据权利要求 1所述的低速业务复用的方法, 其特征在于, 所述低 速业务的速率通过对所述低速业务进行时钟数据恢复获得。
4. 根据权利要求 1所述的低速业务复用的方法, 其特征在于, 判断所 述低速业务的类型的步骤具体包括:
根据所述低速业务的速率, 分析所述低速业务信号的帧头, 按照同步 业务定帧方式进行校验, 如果校验通过, 则所述低速业务为同步业务; 根据所述低速业务的速率, 对所述低速业务按照数据业务编码规则进 行校验, 如果校验通过, 则所述低速业务为数据业务;
如果所述低速业务未通过所述同步业务定帧校验, 并且未通过所述数 据业务编码规则校验, 则所述低速业务为未知类型业务。
5. 根据权利要求 1所述的低速业务复用的方法, 其特征在于,还包括: 在将所述同步业务异步映射到为其分配的时隙的过程中, 对所述同步业务 的速率进行调整, 以实现同步业务的速率匹配。
6. 根据权利要求 5所述的低速业务复用的方法, 其特征在于, 对所述 同步业务的速率进行调整具体包括:
利用光通道净荷单元 OPUk调整控制和调整机会开销对所述同步业务 的速率进行正负调整。
7. 根据权利要求 1或 4所述的低速业务复用的方法, 其特征在于, 对 所述低速业务进行封装处理的步骤具体为:
当所述低速业务为数据业务时, 釆用数据业务的标准封装处理方式进 行封装处理;
当所述低速业务为未知类型的业务时, 按照所述未知类型的业务的时 钟, 将所述未知类型的业务信息写入緩存中;
釆用预设的时钟从所述緩存中读取指定长度的数据, 在所述数据前端 添加帧头标记, 当所述未知类型的业务的时钟与预设的时钟不一致时, 通 过在所述数据的末端填充固定序列的数据进行速率适配。
8. 根据权利要求 7所述的低速业务复用的方法, 其特征在于,还包括: 当所述低速业务为未知类型的业务时, 釆用预设的时钟从所述緩存中 读取指定长度的数据后, 在所述数据的末端添加校验位以保证所述低速业 务传输的完整性。
9. 一种低速业务复用装置, 其特征在于, 包括:
时隙划分及分配模块, 用于将光传送网 OTN帧划分成多个时隙, 根据 低速业务的速率将所述多个时隙分配给所述低速业务;
映射模块, 用于判断所述低速业务的类型, 如果所述低速业务为同步 业务, 则将所述同步业务异步映射到所述时隙划分及分配模块为其分配的 时隙中; 否则对所述低速业务进行封装处理, 然后映射到所述时隙划分及 分配模块为其分配的时隙中。
10. 根据权利要求 9所述的装置, 其特征在于, 所述映射模块包括: 同步业务信号判断单元, 用于根据所述低速业务的速率, 对所述低速 业务按照同步业务定帧方式进行校验, 如果校验通过, 则判定所述低速业 务为同步业务;
数据业务信号判断单元, 用于根据所述低速业务的速率, 对所述低速 业务按照数据业务编码规则进行校验, 如果校验通过, 则判定所述低速业 务为数据业务;
未知类型信号判断单元, 用于当所述低速业务未通过所述同步业务定 帧校验且未通过所述数据业务编码规则校验时, 判定所述低速业务为未知 类型业务。
11. 根据权利要求 9所述的装置, 其特征在于, 所述装置还包括:
速率调整模块, 用于在所述映射模块将所述同步业务异步映射到所述 时隙划分及分配模块为其分配的时隙的过程中, 对所述同步业务的速率进 行调整, 以实现同步业务的速率匹配。
12. 根据权利要求 11所述的装置, 其特征在于, 对所述同步业务的速 率进行调整是利用光通道净荷单元 OPUk调整控制和调整机会开销对所述 同步业务的速率进行正负调整。
13. 根据权利要求 10所述的装置, 其特征在于, 所述映射模块包括: 数据业务封装单元, 用于当所述数据业务信号判断单元判定所述低速 业务为数据业务时, 对所述低速业务进行数据业务的标准封装处理;
通用封装单元, 用于当所述未知类型信号判断单元判定所述低速业务 为未知类型的业务时, 按照所述未知类型的业务的时钟, 将所述未知类型 的业务信息写入緩存中; 釆用预设的时钟从所述緩存中读取指定长度的数 据, 在所述数据前端添加帧头标记, 当所述未知类型的业务的时钟与预设 的时钟不一致时, 通过在所述数据的末端填充固定序列的数据进行速率适 配。
14. 根据权利要求 13所述的装置, 其特征在于, 所述通用封装单元还 包括:
校验子单元, 用于当釆用预设的时钟从所述緩存中读取指定长度的数 据后, 在所述数据末端添加校验位以保证所述低速业务传输的完整性。
15. 一种低速业务解复用的方法, 其特征在于, 包括:
根据光传送网 OTN帧的净荷结构指示确定所述 OTN帧中的每个时隙 与低速业务的映射关系, 并确定所述低速业务的类型;
如果所述低速业务为同步业务, 则对所述低速业务对应的时隙进行异 步解映射, 还原出同步业务;
如果所述低速业务为数据业务, 则对所述低速业务对应的时隙进行解 映射, 还原出标准封装信号, 并从所述标准封装信号中提取出数据业务; 如果所述低速业务为未知类型业务, 则对所述低速业务对应的时隙进 行解映射, 还原出通用封装信号, 然后进行解封装处理, 得到未知类型的 业务。
16. 根据权利要求 15所述的低速业务解复用的方法, 其特征在于, 所 述解封装处理的步骤具体包括:
在所述通用封装信号中找到帧头标记;
判断所述通用封装信号中是否包含填充数据, 如果是, 则先去掉所述 填充数据, 然后提取出未知类型的业务; 否则, 直接提取出未知类型的业 务。
17. 根据权利要求 16所述的低速业务解复用的方法, 其特征在于, 在 所述通用封装信号中找到帧头标记之后还包括:
利用所述通用封装信号末端的校验位进行校验, 如果校验通过, 则执 行提取未知类型的业务的步骤。
18. 一种低速业务解复用的装置, 其特征在于, 包括:
开销解析模块, 用于根据 OTN帧的净荷结构指示确定所述 OTN帧中 的每个时隙与低速业务的映射关系, 并确定所述低速业务的类型;
同步业务还原模块, 用于当所述开销解析模块确定所述低速业务为同 步业务时, 对所述低速业务对应的时隙进行异步解映射, 还原出同步业务; 数据业务还原模块, 用于当所述开销解析模块确定所述低速业务为数 据业务时, 对所述低速业务对应的时隙进行解映射, 还原出标准封装信号, 并从所述标准封装信号中提取出数据业务;
未知类型业务还原模块, 用于当所述开销解析模块确定所述低速业务 为未知类型业务时, 对所述低速业务对应的时隙进行解映射, 还原出通用 封装信号, 然后进行解封装处理, 得到未知类型的业务。
19. 根据权利要求 18所述的低速业务解复用的装置, 其特征在于, 所 述未知类型业务还原模块具体包括:
解映射单元, 用于当所述开销解析模块确定所述低速业务为未知类型 业务时, 对所述低速业务对应的时隙进行解映射, 还原出通用封装信号; 解封装单元, 用于在所述解映射单元还原出的通用封装信号中找到帧 头标记, 并判断所述通用封装信号中是否包含填充数据, 如果是, 则先去 掉所述填充数据, 然后提取出未知类型的业务; 否则, 直接提取出未知类 型的业务。
20. 根据权利要求 19所述的低速业务解复用的装置, 其特征在于, 所 述未知类型业务还原模块还包括:
校验单元, 用于在所述解封装单元找到所述帧头标记后, 利用所述通 用封装信号末端的校验位进行校验, 如果校验通过, 则触发所述解封装单 元执行提取未知类型的业务的步骤。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08715138A EP2120380B1 (en) | 2007-04-06 | 2008-03-04 | A method for multiplexing and de-multiplexing the low bit rate service |
AT08715138T ATE541372T1 (de) | 2007-04-06 | 2008-03-04 | Verfahren zum multiplexen und demultiplexen von niederbitratigen dienst |
US12/571,556 US20100021173A1 (en) | 2007-04-06 | 2009-10-01 | Method and apparatus for multiplexing and demultiplexing low bit rate services |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007100903677A CN101051879B (zh) | 2007-04-06 | 2007-04-06 | 低速业务复用及解复用的方法和装置 |
CN200710090367.7 | 2007-04-06 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/571,556 Continuation US20100021173A1 (en) | 2007-04-06 | 2009-10-01 | Method and apparatus for multiplexing and demultiplexing low bit rate services |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008122218A1 true WO2008122218A1 (fr) | 2008-10-16 |
Family
ID=38783097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2008/070402 WO2008122218A1 (fr) | 2007-04-06 | 2008-03-04 | Procédé de multiplexage et de démultiplexage de service de faible débit binaire |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100021173A1 (zh) |
EP (1) | EP2120380B1 (zh) |
CN (1) | CN101051879B (zh) |
AT (1) | ATE541372T1 (zh) |
WO (1) | WO2008122218A1 (zh) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101771489A (zh) * | 2009-01-06 | 2010-07-07 | 华为技术有限公司 | 不同类型业务统一传输的方法和***、通信节点和服务器 |
EP2228928A1 (en) * | 2009-03-09 | 2010-09-15 | Alcatel-Lucent Italia S.p.A. | Method for data transmission in an optical transport network |
EP2237457A2 (en) * | 2009-03-09 | 2010-10-06 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
CN102075296A (zh) * | 2011-01-20 | 2011-05-25 | 中兴通讯股份有限公司 | 一种光传送网背板实现前向纠错的方法、***及装置 |
CN103825668A (zh) * | 2009-12-24 | 2014-05-28 | 华为技术有限公司 | 通用映射规程gmp映射方法、解映射方法及装置 |
US10164728B2 (en) | 2009-12-24 | 2018-12-25 | Huawei Technologies Co., Ltd. | Method and apparatus for generic mapping procedure GMP and method and apparatus for generic mapping procedure GMP demapping |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101051879B (zh) * | 2007-04-06 | 2012-04-04 | 华为技术有限公司 | 低速业务复用及解复用的方法和装置 |
CN101299649B (zh) * | 2008-06-19 | 2011-08-24 | 中兴通讯股份有限公司 | 基于通用成帧规程的多业务混合汇聚方法和装置 |
EP2178248A1 (en) * | 2008-10-14 | 2010-04-21 | Thomson Licensing | A method to improve channel utilization in a time division multiple access based protocol |
CN106130683B (zh) * | 2009-02-10 | 2020-01-10 | 华为技术有限公司 | 客户信号映射和解映射的实现方法及装置 |
US8705402B2 (en) * | 2009-12-24 | 2014-04-22 | Infinera Corporation | Clocking of client signals output from an egress node in a network |
US8149570B2 (en) | 2010-03-18 | 2012-04-03 | Keebler John C | Universal power supply system |
JP5690938B2 (ja) | 2010-09-02 | 2015-03-25 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | 通信ネットワークにおいてトラフィックを送信する方法及び通信ネットワーク装置 |
CN101944989A (zh) * | 2010-09-17 | 2011-01-12 | 华为技术有限公司 | 同步以太网传送方法及装置 |
CN102170599A (zh) * | 2011-05-09 | 2011-08-31 | 中兴通讯股份有限公司 | 实现业务映射的方法及装置 |
WO2012171160A1 (zh) * | 2011-06-13 | 2012-12-20 | 华为技术有限公司 | 光传送网背板时分到空分位宽转换方法及背板 |
US8694485B2 (en) * | 2011-07-14 | 2014-04-08 | Normand Pigeon | Interactive media card |
WO2012106946A1 (zh) * | 2011-08-16 | 2012-08-16 | 华为技术有限公司 | 一种可变速率信号的处理方法、装置及*** |
CN103580786B (zh) * | 2012-07-27 | 2018-01-19 | 中兴通讯股份有限公司 | 减小时分复用业务时延抖动的方法及*** |
CN102916910B (zh) * | 2012-11-01 | 2015-04-15 | 中国电子科技集团公司第五十四研究所 | 一种基于异步体制的同步复分接方法 |
EP2738964A1 (en) * | 2012-12-03 | 2014-06-04 | Alcatel Lucent | Method and apparatus for transmitting an asynchronous transport signal over an optical section |
US10079642B2 (en) * | 2013-01-02 | 2018-09-18 | Renesas Electronics America Inc. | Transporting multiple low-speed data streams across a high-speed communication link |
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 |
CN106506110B (zh) * | 2015-09-06 | 2020-05-29 | 中兴通讯股份有限公司 | 统计复用光传送网方法及装置 |
CN109861781B (zh) * | 2017-11-30 | 2021-02-12 | 华为技术有限公司 | 接口传输方法、装置及设备 |
CN108333398B (zh) * | 2018-01-18 | 2020-06-09 | 研耀(上海)信息科技有限公司 | 一种高节能电表 |
CN111989933B (zh) * | 2018-09-13 | 2022-05-10 | 华为技术有限公司 | 光传送网中的数据传输方法及装置 |
CN109560894B (zh) * | 2018-12-24 | 2021-06-22 | 京信通信***(中国)有限公司 | 一种直放站传输速率适配的方法及设备 |
CN112865910A (zh) * | 2019-11-28 | 2021-05-28 | 中兴通讯股份有限公司 | 一种数据传输方法、装置、终端设备和存储介质 |
CN113595965A (zh) * | 2020-04-30 | 2021-11-02 | 中兴通讯股份有限公司 | 业务数据处理、交换、提取方法及设备、计算机可读介质 |
CN112559428A (zh) * | 2020-12-21 | 2021-03-26 | 苏州易行电子科技有限公司 | 一种基于PCIe的HDLC控制器的FPGA芯片 |
CN114928421B (zh) * | 2022-04-26 | 2024-05-24 | 青岛广电海创文化科技有限公司 | 一种cdr低速率数据传输***及传输方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030048813A1 (en) * | 2001-09-05 | 2003-03-13 | Optix Networks Inc. | Method for mapping and multiplexing constant bit rate signals into an optical transport network frame |
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 |
CN1790993A (zh) * | 2004-12-14 | 2006-06-21 | 华为技术有限公司 | 在光传送网中传输低速率业务信号的方法 |
CN101051879A (zh) * | 2007-04-06 | 2007-10-10 | 华为技术有限公司 | 低速业务复用及解复用的方法和装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6430201B1 (en) * | 1999-12-21 | 2002-08-06 | Sycamore Networks, Inc. | Method and apparatus for transporting gigabit ethernet and fiber channel signals in wavelength-division multiplexed systems |
JP3586204B2 (ja) * | 2001-02-19 | 2004-11-10 | 日本電信電話株式会社 | 多重化中継伝送装置 |
US7885186B2 (en) * | 2003-10-03 | 2011-02-08 | Ciena Corporation | System and method of adaptively managing bandwidth on optical links shared by multiple-services using virtual concatenation and link capacity adjustment schemes |
CN100596043C (zh) * | 2004-08-26 | 2010-03-24 | 华为技术有限公司 | 实现低速信号在光传输网络中透明传送的方法和装置 |
EP1657839B1 (en) * | 2004-11-12 | 2010-02-10 | Alcatel Lucent | Method and apparatus for transporting a client layer signal over an optical transport network (OTN) |
US7633933B2 (en) * | 2007-01-29 | 2009-12-15 | Ciena Corporation | Systems and methods for a hierarchical layer one and layer two cross-connect in a transport and aggregation platform |
-
2007
- 2007-04-06 CN CN2007100903677A patent/CN101051879B/zh not_active Expired - Fee Related
-
2008
- 2008-03-04 AT AT08715138T patent/ATE541372T1/de active
- 2008-03-04 WO PCT/CN2008/070402 patent/WO2008122218A1/zh active Application Filing
- 2008-03-04 EP EP08715138A patent/EP2120380B1/en not_active Not-in-force
-
2009
- 2009-10-01 US US12/571,556 patent/US20100021173A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030048813A1 (en) * | 2001-09-05 | 2003-03-13 | Optix Networks Inc. | Method for mapping and multiplexing constant bit rate signals into an optical transport network frame |
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 |
CN1790993A (zh) * | 2004-12-14 | 2006-06-21 | 华为技术有限公司 | 在光传送网中传输低速率业务信号的方法 |
CN101051879A (zh) * | 2007-04-06 | 2007-10-10 | 华为技术有限公司 | 低速业务复用及解复用的方法和装置 |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101771489A (zh) * | 2009-01-06 | 2010-07-07 | 华为技术有限公司 | 不同类型业务统一传输的方法和***、通信节点和服务器 |
EP2453597A3 (en) * | 2009-03-09 | 2014-08-27 | Alcatel Lucent | Method for data transmission in an optical transport network |
WO2010103018A1 (en) * | 2009-03-09 | 2010-09-16 | Alcatel Lucent | Method for data transmission in an optical transport network |
US8849116B2 (en) | 2009-03-09 | 2014-09-30 | Alcatel Lucent | Method for data transmission in an optical transport network |
EP2237457A3 (en) * | 2009-03-09 | 2011-03-09 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
US8948205B2 (en) | 2009-03-09 | 2015-02-03 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
JP2012520043A (ja) * | 2009-03-09 | 2012-08-30 | アルカテル−ルーセント | 光伝送ネットワークにおけるデータ伝送の方法 |
US11722238B2 (en) | 2009-03-09 | 2023-08-08 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
US9312982B2 (en) | 2009-03-09 | 2016-04-12 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
EP2237457A2 (en) * | 2009-03-09 | 2010-10-06 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
US11063686B2 (en) | 2009-03-09 | 2021-07-13 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
EP2228928A1 (en) * | 2009-03-09 | 2010-09-15 | Alcatel-Lucent Italia S.p.A. | Method for data transmission in an optical transport network |
US10505662B2 (en) | 2009-03-09 | 2019-12-10 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
US9882672B2 (en) | 2009-03-09 | 2018-01-30 | Huawei Technologies Co., Ltd. | Method and apparatus for mapping and de-mapping in an optical transport network |
US10164728B2 (en) | 2009-12-24 | 2018-12-25 | Huawei Technologies Co., Ltd. | Method and apparatus for generic mapping procedure GMP and method and apparatus for generic mapping procedure GMP demapping |
CN103825668B (zh) * | 2009-12-24 | 2017-06-16 | 华为技术有限公司 | 通用映射规程gmp映射方法、解映射方法及装置 |
CN103825668A (zh) * | 2009-12-24 | 2014-05-28 | 华为技术有限公司 | 通用映射规程gmp映射方法、解映射方法及装置 |
CN102075296A (zh) * | 2011-01-20 | 2011-05-25 | 中兴通讯股份有限公司 | 一种光传送网背板实现前向纠错的方法、***及装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2120380B1 (en) | 2012-01-11 |
EP2120380A1 (en) | 2009-11-18 |
ATE541372T1 (de) | 2012-01-15 |
EP2120380A4 (en) | 2010-11-24 |
US20100021173A1 (en) | 2010-01-28 |
CN101051879B (zh) | 2012-04-04 |
CN101051879A (zh) | 2007-10-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2008122218A1 (fr) | Procédé de multiplexage et de démultiplexage de service de faible débit binaire | |
US8305925B2 (en) | Method, apparatus and system for transporting multi-lane ethernet signal | |
US7782843B2 (en) | Method and apparatus for synchronous cross-connect switching in optical transport network | |
US20200092029A1 (en) | Method and apparatus for mapping and de-mapping in an optical transport network | |
US8374186B2 (en) | Method, apparatus and system for transmitting and receiving client signals | |
JP4878629B2 (ja) | 多重伝送システムおよび多重伝送方法 | |
EP3462647B1 (en) | Method for transporting client signal in optical transport network, and transport device | |
US9497064B2 (en) | Method and apparatus for transporting ultra-high-speed Ethernet service | |
WO2019213901A1 (zh) | 光传送网中低速业务数据的处理方法、装置和*** | |
US20070264015A1 (en) | Uniform Switching System and Method for Synchronous Optical Network and Optical Transport Network | |
US8180224B2 (en) | Method, apparatus and system for transmitting Ethernet signals in optical transport network | |
US11405703B2 (en) | Method and apparatus for transmission using interface, and device | |
US20030048813A1 (en) | Method for mapping and multiplexing constant bit rate signals into an optical transport network frame | |
WO2006021157A1 (fr) | Procede et equipement pour la transmission transparente de signaux a faible vitesse dans un reseau de transmission optique | |
US20090263131A1 (en) | Method and system for transmitting ethernet data in an optical transport network | |
WO2020156216A1 (zh) | 传输配置信息的方法、装置、存储介质和*** | |
WO2012155710A1 (zh) | 一种实现otn业务映射及解映射的方法和装置 | |
CN101350691B (zh) | 一种业务汇聚和adm分插复用方法及设备 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08715138 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008715138 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |