CN101217314B - Method realizing optical transmission system performance management optimization - Google Patents
Method realizing optical transmission system performance management optimization Download PDFInfo
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- CN101217314B CN101217314B CN200810065019.9A CN200810065019A CN101217314B CN 101217314 B CN101217314 B CN 101217314B CN 200810065019 A CN200810065019 A CN 200810065019A CN 101217314 B CN101217314 B CN 101217314B
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Abstract
The invention discloses a method for implementing the optical performance optimized management of an optical transmission system; firstly, the invention detects the optical performance of an optical performance management domain with a multiplex layer, wherein, the optical performance management domain with the multiplex layer is a multiplex section; then the invention optimizes the optical performance management domain with the multiplex layer according to the detection result. The technical proposal of the invention implements the stable and reliable working of the optical transmission system in various application scenarios.
Description
Technical field
The present invention relates to a kind of implementation method of performance management optimization, especially a kind of implementation method of optical transmission system performance management optimization.
Background technology
Optical transmission system bearer traffic is very big, and along with the development of technology, single wavelength transmission system transmission rate has reached 10Gbits/s, 40Gbits/s or higher; And in DWDM (DenseWavelength-Division Multiplexing, dense wave division multipurpose) optical transmission system, 10Gbits/s has been main flow transmission rate, in from now on 2 years, 40Gbits/s speed rates system also will be applied to existing network gradually.DWDM optical transmission system is compared with traditional single wavelength transmission system, the advantage with the ultra-long transmission distance that super large service bandwidth that multi-wavelength multiplex brings and light relaying bring, 10Gbits/s speed DWDM optical transmission system can reach the bandwidth of 1.92T and the transmission range of 3000-5000km now.
The high service bandwidth of optical transmission system, long-distance transmissions mean if transmit interruption or other accidents of occurring, affected communication traffic will be a large amount of and widely, and this has just caused the business of optical transmission system to transmit the high request of stability and reliability.It is that the optimization of the optical property by system guarantees that the business of optical transmission system transmits stability, the optical property of system mainly refers to power of wavelength stability, Optical Signal To Noise Ratio, multiplex layer and channel layer etc. as shown in Figure 1, the OMS of DWDM optical transmission system (Optical Multiplex Section, multiplex section) be divided into three OTS (Optical Transmission Section, optical transmission section); The access point of DWDM optical transmission system is between output point being OCH (Optical Channel, optical channel) section; In system, make optical channel power and OCH section Optical Signal To Noise Ratio in the light through-put power, OCH section of each OTS keep Optimal State, the system that just can realize is without the business stable transfer of error code.In addition,, in the multiple systems scenes such as service protection, human eye protection, the performances such as the power of system, Optical Signal To Noise Ratio also need be maintained and optimize, to guarantee the stability of system.
At present, the optimization to the power of optical transmission system and signal-to-noise performance, generally adopts manual mode to realize, and needs regularly by expert, check network management performance, and adjusts and optimize for possible deteriorated of performance, very high to operating personnel's requirement.In addition, also have the automatic or automatic power of class and the signal-to-noise performance of the following stated to optimize implementation:
1, distributed management
Each node in system of take is management and optimizes unit, and when node input power changes, power output changes thereupon, keeps the constant of downstream power.The problem of this scheme is that whole shortage allocated, and cannot realize the optimum management in system multiplexing section aspect, also cannot realize the optimization of Optical Signal To Noise Ratio simultaneously because each node disperses management voluntarily.
2, error correction code rate
Take error correction code rate as feedback information, power is regulated, realize the optimization of error correction code rate.This mode is the optimum management of multiplex section aspect, but because error correction code rate deteriorated may be power, signal to noise ratio, non-linear etc. immixture, therefore only take error correction code rate as basis for estimation and input, cannot realize the global optimization of system performance.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of implementation method of optical transmission system performance management optimization, has realized the reliable and stable work of optical transmission system under plurality of application scenes.
The technical solution adopted for the present invention to solve the technical problems is:
An implementation method for optical transmission system performance management optimization, comprises the following steps:
A, the optical property of OMPMD (Optical Multiplex Performance ManagementDomain, multiplex layer optical property management domain) is detected, described OMPMD is OMS;
B, according to testing result, described OMPMD is optimized.
In such scheme, when described optical transmission system is multi-wavelength system, described implementation method is further comprising the steps of:
A, the optical property of OCPMD (Optical Channel Performance Management Domain, channel layer optical property management domain) is detected, the wavelength in described OCPMD has identical transmission path;
B, according to testing result, described OCPMD is optimized.
In such scheme, described OMPMD is by detecting its optical property as the multiplex layer luminous power test point of detecting unit wherein, and the adjustment that realizes the unit block that light amplification gain, attenuation regulate as performance element by wherein realizes and optimizing.
In such scheme, described OMPMD comprises one or more OTS, its two end node is OTM (Optical Terminal, point of termination station), OADM (Optical Add-DropMultiplexer, the upper and lower way station of wavelength point) or ROADM (Reconfigurable Add-DropMultiplexer, the upper and lower way station of restructural wavelength point); Described detecting unit is the input power test point of the Optical Amplifier Unit of described each OTS, the Optical Amplifier Unit that described performance element is described each OTS.
In such scheme, the optical property testing result of described OMPMD be each OTS of detecting of described detecting unit gain reduction and, if surpass default decay threshold value, by described performance element, be optimized.
In such scheme, described OCPMD comprises the region that or more than one OMPMD comprise.
In such scheme, described OCPMD is by detecting its optical property as the error rate/error correction code rate test point, optical channel power detection point, signal to noise ratio test point or the optical wavelength test point of detecting unit wherein, and by realizing and optimizing as the optical channel power adjustment unit of performance element or the adjustment of wavelength adjustment unit wherein.
In such scheme, the optical property testing result of described OCPMD is the optical channel power of described detecting unit detection or the equilibrium value of signal to noise ratio, if surpass default equilibrium value threshold value, by described performance element, is optimized.
In such scheme, described OCPMD does not have described detecting unit or performance element, and the wavelength that described OCPMD comprises is invalid wavelength, it is not optimized to management.
In such scheme, described detecting unit is OSA (Optical Spectrum Analyzer, spectrum analysis) equipment, described performance element is VMUX (power-adjustable optical multiplexer) or DGE (Dynamic Gain Equilizer, the balanced node of light).
Beneficial effect of the present invention is mainly manifested in: when technical scheme provided by the invention is carried out optical transmission system performance management optimization, single wavelength system only need carry out the optimum management of OMS aspect, and multi-wavelength system needs to carry out the optimum management of OMS layer and two aspect of OCH layer; When OMS layer is optimized to management, can realizes and optimizing by the adjustment of a plurality of performance elements in OMPMD; When OCH layer is optimized to management, can realizes and optimizing by the adjustment of each performance element in OCPMD; The present invention is applicable to plurality of application scenes, more rationally, has effectively realized the optimum management of optical transmission system performance.
Accompanying drawing explanation
Fig. 1 is standard DWDM optical transmission system structural representation;
Fig. 2 is the flow chart that OMPMD of the present invention is optimized management;
Fig. 3 is the flow chart that OCPMD of the present invention is optimized management;
Fig. 4 is the structural representation of OMPMD of the present invention;
Fig. 5 is the structural representation of OCPMD group of the present invention.
Embodiment
OTU in Fig. 1 is service class veneer, and OMU and ODU are for closing partial wave class veneer, and OPA, OBA are multiplex section class veneer, and OLA is that circuit amplifies website, and this figure is described in background technology, repeats no more herein.
The performance management optimization of optical transmission system comprises OMS layer and two aspect of OCH layer, and wherein, single wavelength system only need carry out the optimum management of OMS aspect, and multi-wavelength system needs to carry out the optimum management of OMS layer and two aspect of OCH layer.Below, just respectively the implementation method of OMS layer and the optimum management of OCH layer is further described by reference to the accompanying drawings.
1, the realization to the optimum management of OMS layer
Optical transmission system is divided into a plurality of OMS, OMPMD of an OMS called after, i.e. multiplex layer optical property management domain.As shown in Figure 4, OMS two end nodes are OTM, OADM or ROADM, by the individual OTS of n (n is natural number), formed, node between OTS is DGE or OLA (OpticalLine Amplifier, circuit amplifies website), L in Fig. 4 represents circuit, and N represents node device, the gain that G indication equipment is realized.It is basic module that OMPMD be take detecting unit and performance element, and wherein, detecting unit is multiplex layer luminous power test point, as the input power test point of Optical Amplifier Unit; Performance element is the unit block of realizing light amplification gain, attenuation adjusting, as Optical Amplifier Unit.
The optimum management of OMPMD triggers based on event or poll, and its implementation as shown in Figure 2, comprises the following steps:
Step 201: the optical property of OMPMD is detected by detecting unit;
Step 202: according to testing result, by performance element, OMPMD is optimized; The gain reduction that the optical property testing result of OMPMD is each OTS and time, if it surpasses default decay threshold value, the adjustment by performance element is optimized.
In such scheme, OMS is optimized and is managed as a unified shader model, when its certain OTS comprising produces fault, as line loss increase etc., the realization of its compensation and optimizational function, can realize at a plurality of OTS and node, and can before the residing power of optical transmission system and signal to noise ratio state and change allocation strategy, therefore can provide more powerful rational optimum management.
2, the realization to the optimum management of OCH layer
For OCH layer, the OCPMD of take is optimized and manages as unified shader model.OCPMD is based on wavelength, and the wavelength with identical traffic path forms an OCPMD, can be across a plurality of OMPMD region within the jurisdiction.It is basic module that OCPMD be take detecting unit and performance element, and wherein, detecting unit is the error rate/error correction code rate test point, optical channel power detection point, signal to noise ratio test point or optical wavelength test point, as OSA equipment; Performance element is optical channel power adjustment unit or wavelength adjustment unit, as VMUX or DGE.If OCPMD does not have detecting unit or performance element, on the transmission path of wavelength wherein, there is not detecting unit or performance element, it is not optimized to management.
The OCPMD group of Fig. 5 for setting up by above description, OLA in figure represents that circuit amplifies website, N represents node device, the gain that G indication equipment is realized, the OCPMD group of describing in figure is across 4 OMPMD, and table 1 has represented the transmission path of each wavelength, wherein, ← expression wavelength is set out on a journey, → representing road under wavelength ,-expression wavelength is straight-through; Different OCPMD has different detecting units and performance element.
Table 1
The optimum management of OCPMD triggers based on event or poll, and its implementation as shown in Figure 3, comprises the following steps:
Step 301: the optical property of OCPMD is detected by detecting unit;
Step 302: according to testing result, by performance element, OCPMD is optimized; When the optical property testing result of OCPMD is the equilibrium value of optical channel power or signal to noise ratio, if it surpasses default equilibrium value threshold value, the adjustment by performance element is optimized; Adjusting strategy can be configured by reset condition and the characteristic of OCPMD, adopts normalized during system optimization, guarantees that multiplex layer power rating is constant.
In such scheme, by means of signal to noise ratio and channel power, and not only depend on error rate state, can more reasonably realize the optimization of systematic function; And the wavelength that each transfer path is identical possesses identical detection and controlled condition, as same OCPMD, manage and optimize, can shorten the required time of system optimization.
Claims (8)
1. the implementation method of an optical transmission system performance management optimization, it is characterized in that, comprise multiplex layer optimum management and channel layer optimum management, wherein, single wavelength system carries out the optimum management of multiplex layer, and multi-wavelength system is carried out the optimum management of multiplex layer and two aspects of channel layer;
The optimum management of described multiplex layer comprises the following steps:
A, the optical property of multiplex layer optical property management domain is detected, described multiplex layer optical property management domain is multiplex section;
B, according to testing result, described multiplex layer optical property management domain is optimized;
The optimum management of described channel layer comprises the following steps:
A, the optical property of channel layer optical property management domain is detected, the error rate/error correction code rate test point, optical channel power detection point, signal to noise ratio test point or the optical wavelength test point as the detecting unit that are specially by wherein detect its optical property;
Wavelength in described channel layer optical property management domain has identical transmission path;
B, according to testing result, described channel layer optical property management domain is optimized, is specially by realizing and optimizing as the optical channel power adjustment unit of performance element or the adjustment of wavelength adjustment unit wherein.
2. the implementation method of optical transmission system performance management optimization as claimed in claim 1, it is characterized in that: described multiplex layer optical property management domain is by detecting its optical property as the multiplex layer luminous power test point of detecting unit wherein, and the adjustment that realizes the unit block that light amplification gain, attenuation regulate as performance element by wherein realizes and optimizing.
3. the implementation method of optical transmission system performance management optimization as claimed in claim 2, it is characterized in that: described multiplex layer optical property management domain comprises one or more optical transmission sections, its two end node is point of termination station, the upper and lower way station point of wavelength or the upper and lower way station of restructural wavelength point; Described detecting unit is the input power test point of the Optical Amplifier Unit of described each optical transmission section, the Optical Amplifier Unit that described performance element is described each optical transmission section.
4. the implementation method of optical transmission system performance management optimization as claimed in claim 3, it is characterized in that: the optical property testing result of described multiplex layer optical property management domain be each optical transmission section of detecting of described detecting unit gain reduction and, if surpass default decay threshold value, be optimized by described performance element.
5. the implementation method of optical transmission system performance management optimization as claimed in claim 1, is characterized in that: described channel layer optical property management domain comprises the region that or more than one multiplex layer optical property management domain comprise.
6. the implementation method of optical transmission system performance management optimization as claimed in claim 1, it is characterized in that: the optical property testing result of described channel layer optical property management domain is the optical channel power of described detecting unit detection or the equilibrium value of signal to noise ratio, if surpass default equilibrium value threshold value, be optimized by described performance element.
7. the implementation method of the optical transmission system performance management optimization as described in claim 1 or 5 or 6, it is characterized in that: described channel layer optical property management domain does not have described detecting unit or performance element, the wavelength that described channel layer optical property management domain comprises is invalid wavelength, it is not optimized to management.
8. the implementation method of optical transmission system performance management optimization as claimed in claim 7, is characterized in that: described detecting unit is spectral analysis apparatus, and described performance element is the balanced node of power-adjustable optical multiplexer or light.
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| CN102263591B (en) * | 2010-05-26 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of optical channel layers power management optimization system and method |
| CN106331905A (en) * | 2015-06-24 | 2017-01-11 | 中兴通讯股份有限公司 | Wavelength division network optical layer management method, system and device |
| CN107888402B (en) * | 2016-09-30 | 2021-01-29 | 华为技术有限公司 | Optical multiplexing section elastic networking method, device and system |
| CN108768579B (en) * | 2018-05-17 | 2019-11-05 | 烽火通信科技股份有限公司 | A kind of fine cable automatic optical power control method and system based on optical channel path |
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Effective date of registration: 20200806 Address after: 210012 Nanjing, Yuhuatai District, South Street, Bauhinia Road, No. 68 Patentee after: Nanjing Zhongxing Software Co.,Ltd. Address before: 518057 Nanshan District Guangdong high tech Industrial Park, South Road, science and technology, ZTE building, Ministry of Justice Patentee before: ZTE Corp. |