CN102025440B - Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system - Google Patents
Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system Download PDFInfo
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- CN102025440B CN102025440B CN201010596132.7A CN201010596132A CN102025440B CN 102025440 B CN102025440 B CN 102025440B CN 201010596132 A CN201010596132 A CN 201010596132A CN 102025440 B CN102025440 B CN 102025440B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
Abstract
The invention provides a method, terminal and system for scanning a GFEC (Generic Forward Error Correction) blind area in a 100G system. In the method, in the process of carrying out GFEC decoding on OTU4 (Optical Transport Network) frame signals by a framer, if error code correcting information is not obtained after framing is successfully performed, the quantity information of uncorrectable blocks (UCB) generated in the GFEC decoding process is transmitted to a line side light module; and the line side light module carries out interference adjustment of a delay line according to the received quantity information of UCB. According to the invention, when an error code rate of the system is in a GFEC blind area, effective data required for DLI (Data Link Interface) adjustment can be provided to the line side light module..
Description
Technical field
The invention belongs to wavelength-division transmission technique field, specifically, relate in 100G system, how to complete the blind area scanning that GFEC (general forward error correction) decodes method and system, framer and line side optical module.
Background technology
Along with the rapid growth of bearer network market bandwidth demand, core router has released 100GE (100G Ethernet) port, 100G is caused to be evolved into a clear and definite developing direction gradually, that is exactly the long range propagation that DWDM (Dense Wavelength Division Multiplexing, intensive multiplexed optical wave is used) equipment must support 100G.
For OTN (the Optical Transport Network of 100G, optical transfer network) standard, ITUT (International Telecommunication Union's telecommunication standardsization tissue) has worked out the relevant encapsulation definition of ODU (light data cell) 4/OUT (optical transmission unit) 4, and wherein FEC (forward error correction) part still can realize with GFEC (general forward error correction).Line side optical module many employings RZ-DQPSK (modulation of the zero-difference four phase place phase shift keying) scheme of current 100G system, DLI (delay line interference) adjustment of receiver needs the data such as some LOF (Loss of Frame, LOF), the error rate as the criterion of adjustment.
Therefore GFEC in the line side of 100G system except carrying out the correction of business datum error code, can also provide correct number of bit errors (error correction 0, error correction 1) or error correction before the error rate, can not the data such as number of bit errors be corrected, be supplied to line side optical module and adjust foundation as DLI.
Before providing error correction for line side optical module during bit error rate information, there is so a kind of possibility, when system can search frame head, now the most high threshold of error rate of system is about 1E-3 (see G.709 and G.798 frame alignment related Sections), but owing to adopting GFEC scheme, before the error correction of GFEC (general forward error correction), bit error rate threshold is 1E-4, therefore this is interval just to there is 1E-3 to 1E-4, now complete the framing of OTU4 business in framer, namely without LOF signal, but the error rate before effective error correction cannot being provided to line side optical module, and then criterion can not be provided for system fine setting, this interval can be called the blind area of GFEC under 100G system.Need to consider that error rate of system is when being in GFEC blind area in 100G system, how for line side optical module provide DLI adjust needed for valid data.
Summary of the invention
The invention provides the method and system of GFEC blind area scanning in a kind of 100G system, framer and line side optical module, during to be in GFEC blind area at error rate of system, DLI can be provided to adjust required valid data for line side optical module.
In order to solve the problems of the technologies described above, the invention provides the method for general forward error correction (GFEC) blind area scanning in a kind of 100G system, comprising:
Framer is carrying out in the process of GFEC decoding OTU4 frame signal, corrects error code information, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces is sent to line side optical module if do not obtain after successful framing;
Described line side optical module carries out delay line interference adjustment according to the quantity information of the described UCB received.
Further, said method also has feature below: the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces by described framer sends to the step of line side optical module to comprise:
Described framer statistics carries out the quantity of the UCB produced in GFEC decoding to OTU4 frame signal described in each frame;
The described UCB quantity information counted is sent to line side optical module in real time.
Further, said method also has feature below: the step that described line side optical module carries out delay line interference adjustment according to the UCB quantity information received comprises:
Described line side optical module carries out the coarse adjustment of delay line interference according to the UCB quantity information received, and subsequently received UCB quantity is reduced gradually, until the quantity of described UCB is 0.
In order to solve the problem, present invention also offers a kind of framer, wherein, comprise:
Decoder module, for carrying out GFEC decoding to OTU4 frame signal, correcting error code information if do not obtain after successful framing, then triggering processing module;
Processing module, sends to line side optical module for the quantity information can not correcting block (UCB) process of decoding at described GFEC produced.
Further, above-mentioned framer also has feature below: described processing module comprises:
Statistic unit, carries out the quantity of the UCB produced in GFEC decoding for adding up to OTU4 frame signal described in each frame;
Transmitting element, for sending to line side optical module in real time by the described UCB quantity information counted.
Further, above-mentioned framer also has feature below: also comprise:
Interface module, the quantity information for the described UCB described processing module added up by self-defined bus sends to line side optical module.
In order to solve the problem, present invention also offers a kind of line side optical module, comprising:
Adjusting module, for carrying out delay line interference adjustment according to the quantity information can not correcting block (UCB) receiving framer transmission.
Further, above-mentioned line side optical module also has feature below:
Described adjusting module carries out delay line interference adjustment according to the quantity information receiving described UCB and is achieved in the following ways: the coarse adjustment carrying out delay line interference according to the UCB quantity information received, subsequently received UCB quantity is reduced gradually, until the quantity of described UCB is 0.
In order to solve the problem, present invention also offers the system of general forward error correction (GFEC) blind area in a kind of scanning 100G system, comprising:
Framer, for carrying out in the process of GFEC decoding to OTU4 frame signal, correct error code information if do not obtain after successful framing, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces is sent to line side optical module;
Described line side optical module, for carrying out delay line interference adjustment according to the quantity information of the described UCB received.
Further, said system also has feature below: described UCB quantity information is sent to line side optical module by mode below by described framer: described UCB quantity information is sent to line side optical module by self-defined bus by described framer.
To sum up, according to method and system, framer and line side optical module that GFEC blind area in a kind of 100G system provided by the invention is scanned, achieve when error rate of system is in GFEC blind area as line side optical module provides DLI to adjust required valid data.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram scanning the system of GFEC blind area in 100G system of the present invention;
Fig. 2 is the flow chart of the method for GFEC blind area scanning in 100G system of the present invention;
Fig. 3 is the schematic diagram of the systematic difference example of scanning GFEC blind area of the present invention;
Fig. 4 is the flow chart that the line side optical module of application example of the present invention carries out DLI adjustment.
Embodiment
Complete OTU4 business framing for solving framer, but the error rate is inferior to 1E-4 before the error correction of system, namely beyond the error correction scope of GFEC, when there is error code after error correction in OTU4 business, code rate information before framer cannot provide effective error correction by mistake to line side optical module, and then can not adjust for system DLI the problem that criterion is provided, scheme provided by the invention produces when scanning GFEC blind area to correct block (UCB) information, by UCB information for system DLI adjustment provides criterion.
The invention provides a kind of system scanning GFEC blind area in 100G system, as shown in Figure 1, comprising: framer and line side optical module, wherein,
Framer, for carrying out in the process of GFEC decoding to OTU4 frame signal, correct error code information if do not obtain after successful framing, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces is sent to line side optical module;
Described line side optical module, for carrying out delay line interference adjustment according to the UCB numerical information received.
Like this, system of the present invention namely can before framer cannot provide effective error correction by mistake to line side optical module the situation of code rate information, by UCB information for system DLI adjustment provides criterion.
Wherein, framer can comprise: decoder module and processing module, wherein,
Decoder module, for carrying out GFEC decoding to OTU4 frame signal, correcting error code information if do not obtain after successful framing, then triggering processing module;
Processing module, sends to line side optical module for the quantity information can not correcting block (UCB) process of decoding at described GFEC produced.
Described processing module may further include: statistic unit and transmitting element, wherein,
Statistic unit, carries out the quantity of the UCB occurred in GFEC decoding for adding up to OTU4 frame signal described in each frame;
Transmitting element, for sending to line side optical module in real time by the described UCB quantity information counted.
Wherein, framer can also comprise: interface module, and the quantity information for the described UCB described processing module added up by self-defined bus sends to line side optical module.
Wherein, line side optical module can comprise adjusting module, for carrying out delay line interference adjustment according to the quantity information can not correcting block (UCB) receiving framer transmission.Particularly, adjusting module can carry out the coarse adjustment of delay line interference according to the UCB quantity information received, subsequently received UCB quantity is reduced gradually, until the quantity of described UCB is 0.
Native system simplicity of design, easily to realize, the numerical information of UCB can be produced when designing GFEC decoder module in passing, when being in GFEC blind area as error rate of system, adjusting good basis for estimation to line side optical module DLI.
Fig. 2 is the flow chart of the method for GFEC blind area scanning in 100G system of the present invention, and as shown in Figure 2, this method comprises step:
Step 10, framer are carrying out in the process of GFEC decoding to OTU4 frame signal, correct error code information if do not obtain after successful framing, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces is sent to line side optical module;
Step 20, line side optical module carry out delay line interference adjustment according to the quantity information of the UCB received.
Particularly, line side optical module carries out the coarse adjustment of delay line interference according to the UCB numerical information received, and the UCB numerical value received is reduced gradually, until described UCB numerical value is 0, be better than 1E-4 with the error rate before making the error correction of system line trackside, reach the error correction scope of GFEC.
Fig. 3 is the schematic diagram of the systematic difference example of scanning GFEC blind area of the present invention, and as shown in Figure 3, framer comprises: OTU4 framing module, GFEC decoder module and feedback signal interface module, wherein,
OTU4 framing module, carries out framing for passing the OTU4 service signal of coming to line side optical module, if cannot framing, then produces LOF alarm, LOF alarm signal is exported to feedback signal interface module; If framing, then OTU4 frame signal is exported to GFEC decoder module;
GFEC decoder module, for carrying out GFEC decoding to OTU4 frame signal, if the error rate before obtaining error correction, then exports to feedback signal interface module by the error rate before error correction; If the error rate before not obtaining error correction, then add up the quantity of each frame OTU4 frame signal being carried out to the UCB produced in GFEC decode procedure, the quantity information of UCB is exported to feedback signal interface module;
Feedback signal interface module, for being sent to line side optical module by self-defining bus by these information such as bit error rate information before LOF alarm signal, UCB quantity information, error correction.
Line side optical module comprises: DLI adjusting module, and the parameter of information to DLI module according to receiving the transmission of feedback signal interface module adjusts.
Fig. 4 is the flow chart that the line side optical module of application example of the present invention carries out DLI adjustment, as shown in Figure 4, can comprise step below:
In step 101, line side optical module, the DLI adjusting module of receiver to receive before the LOF alarm signal of framer Real-time Feedback, error correction after the information such as the error rate, UCB quantity information, first judges whether to receive LOF alarm signal, if so, then goes to step 102; Otherwise, then 103 are gone to step;
Step 102, adjust DLI on a large scale, to find OTU4 frame head, then return step 101;
Step 103, judge whether to there is UCB, if so, then enter step 105; Otherwise, enter step 104;
Step 104, DLI finely tune the stage, namely follow the tracks of, then return step 101;
Step 105, basis receive UCB numerical information and carry out DLI coarse adjustment, control module, by the parameter of adjustment DLI module, makes the UCB received minimum within the unit interval, until disappear, before such error correction, the error rate will be better than 1E-4, can obtain a yard information of correcting a mistake.
The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
These are only the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (8)
1. a method for general forward error correction (GFEC) blind area scanning in 100G system, comprising:
Framer is carrying out in the process of GFEC decoding OTU4 frame signal, corrects error code information, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces is sent to line side optical module if do not obtain after successful framing;
Described line side optical module carries out delay line interference adjustment according to the quantity information of the described UCB received.
2. the method for claim 1, is characterized in that: the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces by described framer sends to the step of line side optical module to comprise:
Described framer statistics carries out the quantity of the UCB produced in GFEC decoding to OTU4 frame signal described in each frame;
The described UCB quantity information counted is sent to line side optical module in real time.
3. the method for claim 1, is characterized in that: the step that described line side optical module carries out delay line interference adjustment according to the UCB quantity information received comprises:
Described line side optical module carries out the coarse adjustment of delay line interference according to the UCB quantity information received, and subsequently received UCB quantity is reduced gradually, until the quantity of described UCB is 0.
4. a framer, is characterized in that, comprising:
Decoder module, for carrying out GFEC decoding to OTU4 frame signal, correcting error code information if do not obtain after successful framing, then triggering processing module;
Processing module, sends to line side optical module for the quantity information can not correcting block (UCB) process of decoding at described GFEC produced.
5. framer as claimed in claim 4, is characterized in that: described processing module comprises:
Statistic unit, carries out the quantity of the UCB produced in GFEC decoding for adding up to OTU4 frame signal described in each frame;
Transmitting element, for sending to line side optical module in real time by the described UCB quantity information counted.
6. the framer as described in claim 4 or 5, is characterized in that: also comprise:
Interface module, the quantity information for the described UCB described processing module added up by self-defined bus sends to line side optical module.
7. scan a system for general forward error correction (GFEC) blind area in 100G system, comprising:
Framer, for carrying out in the process of GFEC decoding OTU4 frame signal, correcting error code information if do not obtain after successful framing, then the quantity information can not correcting block (UCB) that the process of decoding at described GFEC produces being sent to line side optical module;
Described line side optical module, for carrying out delay line interference adjustment according to the quantity information of the described UCB received.
8. system as claimed in claim 7, is characterized in that:
Described UCB quantity information is sent to line side optical module by mode below by described framer: described UCB quantity information is sent to line side optical module by self-defined bus by described framer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010596132.7A CN102025440B (en) | 2010-12-20 | 2010-12-20 | Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system |
| PCT/CN2011/078093 WO2012083700A1 (en) | 2010-12-20 | 2011-08-08 | Scanning method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201010596132.7A CN102025440B (en) | 2010-12-20 | 2010-12-20 | Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system |
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| CN102025440A CN102025440A (en) | 2011-04-20 |
| CN102025440B true CN102025440B (en) | 2015-01-28 |
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| CN102025440B (en) * | 2010-12-20 | 2015-01-28 | 中兴通讯股份有限公司 | Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system |
| CN114465664B (en) * | 2022-01-26 | 2022-10-18 | 北京极光星通科技有限公司 | Optical delay line interferometer control method, system and computer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7066311B2 (en) * | 2003-10-10 | 2006-06-27 | Timothy J. C. O'Shea | Retractable wheel assembly for a carrier |
| CN100471092C (en) * | 2001-09-17 | 2009-03-18 | 阿尔卡塔尔公司 | Method for performance monitoring data according to forward error correction in communication network |
| CN101436906A (en) * | 2007-11-12 | 2009-05-20 | 中兴通讯股份有限公司 | Apparatus and method for optimizing differential phase-shift-keyed optic transmission system |
| CN101471741A (en) * | 2007-12-26 | 2009-07-01 | 希尔纳公司 | Byte-interleaving systems and methods for 100G optical transport enabling multi-level optical transmission |
| CN101534169A (en) * | 1999-11-22 | 2009-09-16 | Ipr特许公司 | Variable rate coding for forward link |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8805195B2 (en) * | 2007-07-16 | 2014-08-12 | Ciena Corporation | High-speed optical transceiver for InfiniBand and Ethernet |
| US7266311B2 (en) * | 2004-09-29 | 2007-09-04 | Lucent Technologies Inc. | Control of delay line interferometer |
| JP5419534B2 (en) * | 2009-05-11 | 2014-02-19 | 三菱電機株式会社 | FEC frame construction apparatus and method |
| CN102025440B (en) * | 2010-12-20 | 2015-01-28 | 中兴通讯股份有限公司 | Method and system for scanning GFEC (Generic Forward Error Correction) blind area in 100G system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101534169A (en) * | 1999-11-22 | 2009-09-16 | Ipr特许公司 | Variable rate coding for forward link |
| CN100471092C (en) * | 2001-09-17 | 2009-03-18 | 阿尔卡塔尔公司 | Method for performance monitoring data according to forward error correction in communication network |
| US7066311B2 (en) * | 2003-10-10 | 2006-06-27 | Timothy J. C. O'Shea | Retractable wheel assembly for a carrier |
| CN101436906A (en) * | 2007-11-12 | 2009-05-20 | 中兴通讯股份有限公司 | Apparatus and method for optimizing differential phase-shift-keyed optic transmission system |
| CN101471741A (en) * | 2007-12-26 | 2009-07-01 | 希尔纳公司 | Byte-interleaving systems and methods for 100G optical transport enabling multi-level optical transmission |
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| WO2012083700A1 (en) | 2012-06-28 |
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