CN101944952A - Device and method for realizing overhead processing of optical transport network - Google Patents
Device and method for realizing overhead processing of optical transport network Download PDFInfo
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- CN101944952A CN101944952A CN2010102917695A CN201010291769A CN101944952A CN 101944952 A CN101944952 A CN 101944952A CN 2010102917695 A CN2010102917695 A CN 2010102917695A CN 201010291769 A CN201010291769 A CN 201010291769A CN 101944952 A CN101944952 A CN 101944952A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
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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]
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Abstract
The invention discloses a device and a method for realizing the overhead processing of an optical transport network. The device comprises an overhead extracting module, an overhead multiplexing/demultiplexing module, an overhead processing module and overhead inserting modules, wherein the overhead extracting module extracts overhead data of an optical channel data unit and transmits the data to the overhead multiplexing/demultiplexing module for serial processing and sorting; the overhead multiplexing/demultiplexing module transmits the overhead data to the overhead processing module sequentially according to a sorting result; the overhead processing module detects overhead alarm information from the received overhead data, reports the information to a console, generates corresponding overhead data according to the requirements of the console and transmits the generated overhead data to the overhead multiplexing/demultiplexing module; the overhead multiplexing/demultiplexing module demutiplexes the overhead data received from the overhead processing module and transmits the overhead data to each overhead inserting module; and the overhead inserting modules insert the overhead data to an overhead position of the optical channel data unit. The device and the method reduce logic resources needed in the overhead processing process of the optical transport network.
Description
Technical field
This discovery relates to optical communication field, relates in particular to the device and method of a kind of realization OTN (Optical Transport Network, optical transfer network) overhead processing.
Background technology
OTN is based on wavelength-division multiplex technique, at the transmission net of photosphere organization network, is follow-on Backbone Transport Network.G.872, G.709, G.798 OTN by waiting a new generation's " digital transmission system " and " optical transport hierarchy " of the suggestion institute standard of a series of ITU-T.OTN will solve traditional WDM (Wavelength Division Multiplexing, wavelength division multiplexing) network does not have problems such as the long service dispatching ability of wavelength/wavelet, networking capability is weak, protective capability is weak.
OTN has defined the business of three kinds of speed class at present, is respectively OTU1, OTU2, OTU3.See also Fig. 1, this figure is the frame assumption diagram of OTUk, and OTUk (Optical Channel Transport Unit, light path delivery unit) signal format is that 4 row are taken advantage of 4080 row, the OTUk signal has comprised ODUk (Optical Channel Data Unit, light path data cell).ODUk signal format is that 4 row are taken advantage of 3824 row, and the ODUk signal has comprised OPUk (Optical Channel Payload Unit, light path Payload Unit).OPUk signal format is that 4 row are taken advantage of 3808 row.Preceding 16 row of OTUk frame have comprised OTUk, ODUk, the expense of OPUk.The ODUk signal of low order can multiple connection becomes the OTUk signal of high-order.See also Fig. 2, this figure separates the schematic diagram that multiple connection obtains the ODU0 signal from the OTU2 signal, as seen from the figure, when the ODUk of high-order signal is separated the ODUk signal that is multiplexed into low order, needs to handle and separates a plurality of low order ODUk signal overhead that multiple connection obtains.An ODU2 signal can be separated multiple connection and obtain 4 road ODU1 signals, and one road ODU1 signal can further be separated multiple connection again and obtain 2 road ODU0 signals, thereby can know for 1 road ODU2 signal, may need to handle nearly 13 road overhead datas.If the equal independent process of each road overhead data, adopt FPGA (Field-Programmable Gate Array, field programmable gate array) or ASIC (Application Specific Intergrated Circuits, application-specific integrated circuit (ASIC)) realize unusual consumption of natural resource.
Summary of the invention
The invention provides a kind of device and method of the OTN of realization overhead processing, in order to the big problem of logical resource consumption in the OTN overhead processing process in the solution prior art.
Technical scheme of the present invention comprises:
A kind of device of realizing the optical transfer network overhead processing comprises:
The overhead extraction module is used to extract the overhead data of light path data cell, sends it to expense multiplexing and demultiplexing module;
Expense multiplexing and demultiplexing module, be used for the overhead data that receives is carried out the serial process ordering, according to ranking results overhead data is sent to spending process module successively, also is used for the overhead data that receives from spending process module is carried out demultiplexing, it is distributed to each road expense insert module;
Spending process module is used for from the overhead data detection overhead warning information that receives and reports control desk, also is used for according to control desk requirement and generates corresponding overhead data and send to expense multiplexing and demultiplexing module;
The expense insert module, the overhead data that belongs to this road that is used for extracting from expense multiplexing and demultiplexing module is inserted into the expense position of this road light path data cell.
Further, described device also comprises:
Interface module is used for giving control desk with the detected expense alarming information report of spending process module, and the expense generation instruction of control desk is sent to spending process module.
Further, described expense multiplexing and demultiplexing module specifically comprises:
Input first-in first-out module is used for the overhead data of light path data cell is carried out the first-in first-out buffer memory, after the overhead data of this road light path data cell arrives, sends expense to control module and arrives index signal;
Control module, the expense that is used to adopt polling mode to read input first-in first-out module arrives index signal, arrive index signal according to expense and read corresponding overhead data to the data queue output module, also be used for enabling to export the first-in first-out module accordingly, make it with effect according to the arrival index signal of each road overhead data;
The data queue output module is used for the enable signal that provides according to control module, and the overhead data in the corresponding input first-in first-out module is multiplexed into the expense multiplexed data bus, sends to spending process module;
The data queue input module is used for the time of advent that definite spending process module is passed through each road overhead data of expense multiplexed data bus input, provides corresponding expense and arrives index signal to control module;
Output first-in first-out module, be used for the enable signal that provides according to control module, receive the overhead data of data queue input module, it is carried out the first-in first-out buffer memory, the expense that provides according to the expense insert module is read and is enabled, and reads the overhead data of this road light path data cell and delivers to the expense insert module.
Further, described control module was therefrom read corresponding overhead data and is exported to the data queue output module before the overhead data next time of input first-in first-out module arrives.
Further, input first-in first-out module is identical with the quantity of output first-in first-out module in the described expense multiplexing and demultiplexing module, and its value depends on the speed sum of each road Optical Channel Data Unit-k overhead data and the data output rate of data queue output module.
Further, the overhead data of described overhead extraction module extraction is the preceding 16 columns certificates of light path data unit frame 4 row.
The described device of a kind of claim 1 is realized the method for optical transfer network overhead processing, comprises step:
A, overhead extraction module are extracted the overhead data of light path data cell, send it to expense multiplexing and demultiplexing module and carry out the serial process ordering, and expense multiplexing and demultiplexing module is sent to spending process module according to ranking results successively with overhead data;
B, spending process module detection overhead warning information and report control desk from the overhead data that receives, and require to generate corresponding overhead data according to control desk and send to expense multiplexing and demultiplexing module;
C, expense multiplexing and demultiplexing module are carried out demultiplexing to the overhead data that receives from spending process module, and it is distributed to each road expense insert module, overhead data are inserted into the expense position of this road light path data cell by overhead data.
Further, expense multiplexing and demultiplexing module is carried out the serial process ordering to overhead data, according to ranking results with the detailed process that overhead data is sent to spending process module successively is:
Overhead data to the light path data cell carries out the first-in first-out buffer memory, after the overhead data of this road light path data cell arrives, sends expense and arrives index signal;
Arrive index signal according to expense and read corresponding overhead data, it is multiplexed into the expense multiplexed data bus, send to spending process module.
Further, expense multiplexing and demultiplexing module is carried out demultiplexing to the overhead data that receives from spending process module, with its detailed process that is distributed to each road expense insert module is:
Determine that spending process module passes through the time of advent of each road overhead data of expense multiplexed data bus input, send expense and arrive index signal;
Arrival index signal according to each road overhead data is carried out the first-in first-out buffer memory to the overhead data that receives, and the expense that provides according to the expense insert module is read and enabled, and reads the overhead data of this road light path data cell and delivers to the expense insert module.
Further, in the described steps A, the overhead data that the overhead extraction module is extracted is the preceding 16 columns certificates of light path data unit frame 4 row.
Beneficial effect of the present invention is as follows:
Technical scheme of the present invention has compared with prior art reduced the logical resource that needs in the OTN overhead processing process, has realized the modularization multiplexing process of overhead processing, greatly reduces cost.
Description of drawings
Fig. 1 is the frame assumption diagram of OTUk;
Fig. 2 is for to separate the schematic diagram that multiple connection obtains the ODU0 signal from the OTU2 signal;
Fig. 3 is the structured flowchart of the device of the described realization optical transfer network of embodiment of the invention overhead processing;
Fig. 4 is the structured flowchart of expense multiplexing and demultiplexing module in the device of the described realization optical transfer network of embodiment of the invention overhead processing;
Fig. 5 is the flow chart of the method for the described realization optical transfer network of embodiment of the invention overhead processing.
Embodiment
Below in conjunction with each accompanying drawing specific implementation process of the present invention is given further detailed explanation.
See also Fig. 3, this figure is the structured flowchart of the device of the described realization optical transfer network of embodiment of the invention overhead processing, and it mainly comprises:
The overhead extraction module is used for sending it to expense multiplexing and demultiplexing module from all kinds of overhead datas of ODUk extracting data, and what it mainly extracted is the preceding 16 columns certificates of ODUk frame 4 row.
Expense multiplexing and demultiplexing module, be used to receive the overhead data that the overhead extraction module sends, carry out serial process ordering to it the time of advent according to overhead data, according to ranking results overhead data is sent to spending process module successively, also be used for the overhead data that receives from spending process module is carried out demultiplexing, it is distributed to each road expense insert module.
Spending process module, be used for requiring all kinds of overhead datas that receive are handled according to the OTN overhead processing, the detection overhead alarming information report is given control desk from the overhead data that receives, and also is used for according to control desk requirement and generates corresponding overhead data and send to expense multiplexing and demultiplexing module.
The expense insert module, the overhead data that belongs to this road ODUk data that is used for extracting from expense multiplexing and demultiplexing module is inserted into the expense position of this road ODUk data.
Interface module is used for giving control desk with the detected expense alarming information report of spending process module, and the expense generation instruction of control desk is sent to spending process module.
See also Fig. 4, this figure is the structured flowchart of expense multiplexing and demultiplexing module in the device of the described realization optical transfer network of embodiment of the invention overhead processing, and it mainly comprises:
Input FIFO (First In First Out, first-in first-out) module is used for the overhead data of ODUk is carried out the FIFO buffer memory, because be at random multichannel overhead data time of advent of input, need be written to the FIFO buffer to the ODUk overhead data that arrives at random and preserve, wait pending.After the overhead data of this road ODUk all is written to the FIFO buffer, send expense to control module and arrive index signal, the overhead data of notice control module this road ODUk arrives, and needs control module to handle.
Control module is used for the overhead data that multichannel input fifo module receives is carried out multiplexing control.The expense that adopts polling mode constantly to read the input fifo module arrives index signal, and whether decision is read corresponding overhead data and given the data queue output module.For the overhead data of the parallel duplex ODUk that imports, need export to spending process module before expense arrival next time according to the overhead data that the expense arrival index signal that the input fifo module provides will be imported in the fifo module.Also be used for the overhead data of spending process module output is carried out demultiplexing control, enable to export accordingly fifo module, make it with effect according to the arrival index signal of each road overhead data.
The data queue output module is used for the enable signal that provides according to control module, and the overhead data in the corresponding input fifo module is multiplexed into the expense multiplexed data bus, sends to spending process module.
The data queue input module, be used for definite spending process module and pass through the time of advent of each road overhead data of expense multiplexed data bus input, provide corresponding expense and arrive index signal, simultaneously the expense multiplex data is given each road output fifo module to control module.
The output fifo module, be used for the enable signal that provides according to control module, receive the overhead data of data queue input module, it is carried out the FIFO buffer memory, the expense that provides according to the expense insert module is read and is enabled, and reads the overhead data of this road ODUk and deliver to the expense insert module from the FIFO buffer.
The input fifo module is identical with the quantity of output fifo module in the expense multiplexing and demultiplexing module, and its value N depends on the speed sum of each road ODUk overhead data and the data output rate of data queue output module.Suppose that the 1 tunnel expense speed is S1, the 2 tunnel expense speed is S2, and by that analogy, N road expense speed is Sn, and the data output rate of data queue output module is A, by relational expression S1+S2+......+Sn≤A, can extrapolate N.
See also Fig. 5, this figure is the flow chart of the method for the described realization optical transfer network of embodiment of the invention overhead processing, and it mainly comprises the steps:
Step S501, overhead extraction module are extracted the overhead data of ODUk, and it is sent in the input fifo module of multiplexing and demultiplexing module;
In this step, the overhead data that the overhead extraction module is extracted is the preceding 16 columns certificates of 4 row of ODUk frame.
Step S502, the overhead data of ODUk is carried out the first-in first-out buffer memory, after the overhead data of this road ODUk arrives fully, send expense to the control module of multiplexing and demultiplexing module and arrive index signal.
Step S503, control module arrive index signal according to the expense that each input fifo module provides, and adopt the mode of poll, read the overhead data of each input fifo module, give the data queue output module with it.The content that needs to guarantee FIFO buffer in each input fifo module can in time be read before expense arrival next time, was uncovered to guarantee overhead data.
The enable signal that step S504, data queue output module provide according to control module is multiplexed into the expense multiplexed data bus with the overhead data in the corresponding input fifo module, and overhead data is sent to spending process module.
Step S505, spending process module require all kinds of overhead datas that receive are handled successively according to the OTN overhead processing, and the detection overhead alarming information report is given control desk from the overhead data that receives.
Step S506, spending process module produce all kinds of overhead datas according to the requirement of control desk, are inserted into the correspondence position of expense multiplexed data bus, give the data queue input module.
Step S507, data queue input module be according to the time of advent of each road overhead data of expense multiplexed data bus input, provides corresponding expense and arrive index signal and give control module, simultaneously overhead data given each road output fifo module.
Step S508, control module enable to export accordingly fifo module according to the arrival index signal of each road overhead data, and this enables to make the output fifo module with effect.
Step S509, data queue input module are written to the overhead data of correspondence in the output fifo module.
Step S510, expense insert module transmit frame head according to the frame of this road ODUk, and the expense that provides this road ODUk is read enable signal to the output fifo module.
The expense that step S511, output fifo module provide according to the expense insert module is read and is enabled, and reads this road overhead data to the expense insert module.
Step S512, expense insert module will be inserted into the expense position of this road ODUk from the overhead data that the output fifo module is read.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a device of realizing the optical transfer network overhead processing is characterized in that, comprising:
The overhead extraction module is used to extract the overhead data of light path data cell, sends it to expense multiplexing and demultiplexing module;
Expense multiplexing and demultiplexing module, be used for the overhead data that receives is carried out the serial process ordering, according to ranking results overhead data is sent to spending process module successively, also is used for the overhead data that receives from spending process module is carried out demultiplexing, it is distributed to each road expense insert module;
Spending process module is used for from the overhead data detection overhead warning information that receives and reports control desk, also is used for according to control desk requirement and generates corresponding overhead data and send to expense multiplexing and demultiplexing module;
The expense insert module, the overhead data that belongs to this road that is used for extracting from expense multiplexing and demultiplexing module is inserted into the expense position of this road light path data cell.
2. device as claimed in claim 1 is characterized in that, also comprises:
Interface module is used for giving control desk with the detected expense alarming information report of spending process module, and the expense generation instruction of control desk is sent to spending process module.
3. device as claimed in claim 1 or 2 is characterized in that, described expense multiplexing and demultiplexing module specifically comprises:
Input first-in first-out module is used for the overhead data of light path data cell is carried out the first-in first-out buffer memory, after the overhead data of this road light path data cell arrives, sends expense to control module and arrives index signal;
Control module, the expense that is used to adopt polling mode to read input first-in first-out module arrives index signal, arrive index signal according to expense and read corresponding overhead data to the data queue output module, also be used for enabling to export the first-in first-out module accordingly, make it with effect according to the arrival index signal of each road overhead data;
The data queue output module is used for the enable signal that provides according to control module, and the overhead data in the corresponding input first-in first-out module is multiplexed into the expense multiplexed data bus, sends to spending process module;
The data queue input module is used for the time of advent that definite spending process module is passed through each road overhead data of expense multiplexed data bus input, provides corresponding expense and arrives index signal to control module;
Output first-in first-out module, be used for the enable signal that provides according to control module, receive the overhead data of data queue input module, it is carried out the first-in first-out buffer memory, the expense that provides according to the expense insert module is read and is enabled, and reads the overhead data of this road light path data cell and delivers to the expense insert module.
4. device as claimed in claim 3 is characterized in that, described control module was therefrom read corresponding overhead data and exported to the data queue output module before the overhead data next time of input first-in first-out module arrives.
5. device as claimed in claim 3, it is characterized in that, input first-in first-out module is identical with the quantity of output first-in first-out module in the described expense multiplexing and demultiplexing module, and its value depends on the speed sum of each road Optical Channel Data Unit-k overhead data and the data output rate of data queue output module.
6. device as claimed in claim 1 is characterized in that, the overhead data that described overhead extraction module is extracted is the preceding 16 columns certificates of light path data unit frame 4 row.
7. the method for the described device realization of claim 1 an optical transfer network overhead processing is characterized in that, comprises step:
A, overhead extraction module are extracted the overhead data of light path data cell, send it to expense multiplexing and demultiplexing module and carry out the serial process ordering, and expense multiplexing and demultiplexing module is sent to spending process module according to ranking results successively with overhead data;
B, spending process module detection overhead warning information and report control desk from the overhead data that receives, and require to generate corresponding overhead data according to control desk and send to expense multiplexing and demultiplexing module;
C, expense multiplexing and demultiplexing module are carried out demultiplexing to the overhead data that receives from spending process module, and it is distributed to each road expense insert module, overhead data are inserted into the expense position of this road light path data cell by overhead data.
8. method as claimed in claim 7 is characterized in that, expense multiplexing and demultiplexing module is carried out the serial process ordering to overhead data, according to ranking results with the detailed process that overhead data is sent to spending process module successively is:
Overhead data to the light path data cell carries out the first-in first-out buffer memory, after the overhead data of this road light path data cell arrives, sends expense and arrives index signal;
Arrive index signal according to expense and read corresponding overhead data, it is multiplexed into the expense multiplexed data bus, send to spending process module.
9. method as claimed in claim 7 is characterized in that, expense multiplexing and demultiplexing module is carried out demultiplexing to the overhead data that receives from spending process module, with its detailed process that is distributed to each road expense insert module is:
Determine that spending process module passes through the time of advent of each road overhead data of expense multiplexed data bus input, send expense and arrive index signal;
Arrival index signal according to each road overhead data is carried out the first-in first-out buffer memory to the overhead data that receives, and the expense that provides according to the expense insert module is read and enabled, and reads the overhead data of this road light path data cell and delivers to the expense insert module.
10. method as claimed in claim 7 is characterized in that, in the described steps A, the overhead data that the overhead extraction module is extracted is the preceding 16 columns certificates of light path data unit frame 4 row.
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| CN201010291769.5A CN101944952B (en) | 2010-09-26 | 2010-09-26 | Device and method for realizing overhead processing of optical transport network |
| PCT/CN2011/072846 WO2012037809A1 (en) | 2010-09-26 | 2011-04-15 | Device and method for performing overhead processing in optical transport network |
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| CN110661745A (en) * | 2018-06-28 | 2020-01-07 | 中兴通讯股份有限公司 | Overhead transmission method, device, equipment and computer readable storage medium |
| CN110661745B (en) * | 2018-06-28 | 2022-07-08 | 中兴通讯股份有限公司 | Overhead transmission method, device, equipment and computer readable storage medium |
| CN111740782A (en) * | 2019-03-25 | 2020-10-02 | 华为技术有限公司 | Service data processing method and device |
| CN111740782B (en) * | 2019-03-25 | 2023-03-10 | 华为技术有限公司 | Service data processing method and device |
| CN116582412A (en) * | 2023-07-06 | 2023-08-11 | 北京晟芯网络科技有限公司 | OTN cross-chip sending and receiving overhead and request method, device and medium |
| CN116582412B (en) * | 2023-07-06 | 2023-11-24 | 北京晟芯网络科技有限公司 | OTN cross-chip sending and receiving overhead and request method, device and medium |
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| Publication number | Publication date |
|---|---|
| WO2012037809A1 (en) | 2012-03-29 |
| CN101944952B (en) | 2015-05-20 |
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