CN102523068B - Frequency spectrum resource distribution method in elastic optical network and system thereof - Google Patents
Frequency spectrum resource distribution method in elastic optical network and system thereof Download PDFInfo
- Publication number
- CN102523068B CN102523068B CN201110404332.2A CN201110404332A CN102523068B CN 102523068 B CN102523068 B CN 102523068B CN 201110404332 A CN201110404332 A CN 201110404332A CN 102523068 B CN102523068 B CN 102523068B
- Authority
- CN
- China
- Prior art keywords
- light path
- available frequency
- order
- error rate
- frequency spectrum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Optical Communication System (AREA)
Abstract
The invention, which relates to a optical network communication technology field, discloses a frequency spectrum resource distribution method in an elastic optical network and a system thereof. The method comprises the following steps: S1. when a client request arrives, selecting one optical path with maximum available frequency gaps from candidate optical paths; S2. if a bit error rate needed by the client request is less than a preset bit error rate threshold, selecting a low order modulation mode, otherwise executing a step S3; S3. if a hop count of the optical path exceeds a preset hop count threshold, selecting a low order modulation mode, otherwise selecting a high order modulation mode; S4. determining whether there are enough continuous available frequency gaps, if there are enough continuous available frequency gaps, executing a step S5, otherwise obstruct; S5. selecting the frequency gap from a minimum label and establishing the optical path according to the selected modulation mode. According to the invention, during the frequency spectrum resource distribution, an error rate requirement and the hop count are considered. When the resources are sufficient, the information transmission quality requirement can be considered too. The frequency spectrum can be saved and the bit error rate is not increased.
Description
Technical field
The present invention relates to technical field of optical network communication, particularly frequency spectrum resource allocation method and the system in a kind of elasticity optical-fiber network.
Background technology
Although conventional wave long route wavelength division multiplexing (Wavelength Division Multiplexing, WDM) optical-fiber network has many good qualities, but its resource partition size (least unit is a wavelength) is excessive, cause the utilization of resources insufficient, for this problem, someone has proposed the concept of frequency spectrum burst elasticity optical-fiber network SLICE (spectrum-sliced elastic optical path network) before this: give light path end to end according to the frequency spectrum resource of the suitable size of data rate allocation of user's request instead of fixed size.In SLICE, consistent wavelength constraints conversion has become frequency spectrum consistency constraint, after each link frequency spectrum resource burst, (be divided into one by one gap slot frequently) and unify label from low to high, on each section of link, select the slot of same numeral can meet consistency, and the slot using together must have continuous label, with FF algorithm (starting to distribute from minimum label).
In traditional resource allocative decision, path length is all used single modulation system to distribute identical frequency spectrum resource, and guarantee that the light path of growing most has enough transmission qualities, because having enough signal quality nargin, short path processes actual light loss, so just there is the serious wasting of resources, propose apart from self adaptation (DA for this problem people, distance adaptive) distribution of elasticity frequency spectrum resource, select different modulation systems according to light path jumping figure, see figures.1.and.2, short distance adopts high-order modulating (as 16QAM) to distribute a little less slot, long distance adopts low-order-modulated mode (as QPSK) to distribute more slot (reference formula R=2Wlog
2n, R is the data rate of request, and W is required bandwidth, and N is relevant with modulation system, when when 16QAM, N is 16, QPSK, N is 4).
Although adopt high-order modulating can save frequency spectrum when short distance, the error rate (BER) has improved, and fault-tolerance is bad, (for example,, for voice and video graphic service, requires BER≤10 for requiring business that BER is lower not reach requirement
-3; For data service, require BER≤10
-6), but cannot solve at present in order to save frequency spectrum, and the problem that the error rate causing improves.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: the problem that how to solve the error rate raising causing in order to save frequency spectrum.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides the frequency spectrum resource allocation method in a kind of elasticity optical-fiber network, comprise the following steps:
S1: in the time that client-requested arrives, select the light path that available frequency gap is maximum from candidate's light path;
S2: if the required error rate of client-requested is less than default error rate threshold value, select low-order-modulated mode, and perform step S4, otherwise execution step S3;
S3: if the jumping figure of light path exceedes default jumping figure threshold value, select low-order-modulated mode, and perform step S4, otherwise select high-order modulating, and perform step S4;
S4: judge whether enough continuous available frequency gaps, if having, perform step S5, otherwise block;
S5: start to select continuous available frequency gap from minimum label, carry out light path foundation according to the modulation system of selecting.
Preferably, in step S4, before blocking, also comprise step:
S51: whether what judge selection is low-order-modulated mode, is if so, changed to high-order modulating by modulation system, and performs step S52, otherwise blocks;
S52: judge whether enough continuous available frequency gaps, if having, perform step S5, otherwise block.
Preferably, described high-order modulating is 16QAM.
Preferably, described low-order-modulated mode is QPSK.
The invention also discloses the frequency spectrum resource distribution system in a kind of elasticity optical-fiber network, comprising:
Light path is selected module, in the time that client-requested arrives, selects the light path that available frequency gap is maximum from candidate's light path;
Error rate judge module, if be less than default error rate threshold value for the required error rate of client-requested, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise carries out jumping figure judge module;
Jumping figure judge module, if exceed default jumping figure threshold value for the jumping figure of light path, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise selects high-order modulating, and carries out continuous available frequency gap judge module;
Continuous available frequency gap judge module, for judging whether enough continuous available frequency gaps, if having, carries out light path and sets up module, otherwise blocks;
Light path is set up module, for start to select continuous available frequency gap from minimum label, carries out light path foundation according to the modulation system of selecting.
Preferably, also comprise:
Select modulation system judge module, at described continuous usable spectrum judge module, before blocking, whether what judge selection is low-order-modulated mode, if so, modulation system is changed to high-order modulating, and carry out continuous available frequency gap judge module again, otherwise block;
Continuous available frequency gap judge module again, for judging whether enough continuous available frequency gaps, if having, carries out light path and sets up module, otherwise blocks.
Preferably, described high-order modulating is 16QAM.
Preferably, described low-order-modulated mode is QPSK.
(3) beneficial effect
The present invention divides timing carrying out frequency spectrum resource, has considered that the error rate requires and jumping figure, makes, in the time that resource is sufficient, to have taken into account the requirement of information transmission quality, solve in order to save frequency spectrum, and the problem that the error rate causing improves.
Brief description of the drawings
Fig. 1 is the bit error rate performance schematic diagram of various modulation systems under Gaussian channel;
Fig. 2 is the flow chart of traditional frequency spectrum resource allocation method;
Fig. 3 is according to the flow chart of the frequency spectrum resource allocation method in the elasticity optical-fiber network of one embodiment of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Fig. 3 is that the method for present embodiment comprises the following steps according to the flow chart of the frequency spectrum resource allocation method in the elasticity optical-fiber network of one embodiment of the present invention:
S1: in the time that client-requested arrives, select the light path that available frequency gap is maximum from candidate's light path, described candidate's light path is calculated and obtained according to path selection unit (Path Computation Element, PCE);
S2: if the required error rate (i.e. " BER " in figure) of client-requested is less than default error rate threshold value (i.e. " TH1 " in figure), selects low-order-modulated mode, and perform step S4, otherwise execution step S3;
S3: if the jumping figure of light path exceedes default jumping figure threshold value (i.e. " TH2 " in figure), select low-order-modulated mode, and perform step S4, otherwise select high-order modulating, and perform step S4;
S4: judge whether enough continuous available frequency gaps, if having, perform step S5, otherwise block;
S5: start to select continuous available frequency gap from minimum label, carry out light path foundation according to the modulation system of selecting.
Preferably, in step S4, before blocking, also comprise step:
S51: whether what judge selection is low-order-modulated mode, is if so, changed to high-order modulating by modulation system, and performs step S52, otherwise blocks;
S52: judge whether enough continuous available frequency gaps, if having, perform step S5, otherwise block.
In present embodiment, preferably, described high-order modulating is 16QAM, and described low-order-modulated mode is QPSK, but does not limit the scope of the invention, and also can select as required other modulation system.
The invention also discloses the frequency spectrum resource distribution system in a kind of elasticity optical-fiber network, comprising:
Light path is selected module, in the time that client-requested arrives, selects the light path that available frequency gap is maximum from candidate's light path;
Error rate judge module, if be less than default error rate threshold value for the required error rate of client-requested, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise carries out jumping figure judge module;
Jumping figure judge module, if exceed default jumping figure threshold value for the jumping figure of light path, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise selects high-order modulating, and carries out continuous available frequency gap judge module;
Continuous available frequency gap judge module, for judging whether enough continuous available frequency gaps, if having, carries out light path and sets up module, otherwise blocks;
Light path is set up module, for start to select continuous available frequency gap from minimum label, carries out light path foundation according to the modulation system of selecting.
Preferably, also comprise:
Select modulation system judge module, at described continuous usable spectrum judge module, before blocking, whether what judge selection is low-order-modulated mode, if so, modulation system is changed to high-order modulating, and carry out continuous available frequency gap judge module again, otherwise block;
Continuous available frequency gap judge module again, for judging whether enough continuous available frequency gaps, if having, carries out light path and sets up module, otherwise blocks.
Preferably, described high-order modulating is 16QAM.
Preferably, described low-order-modulated mode is QPSK.
Above execution mode is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (6)
1. the frequency spectrum resource allocation method in elasticity optical-fiber network, is characterized in that, comprises the following steps:
S1: in the time that client-requested arrives, select the light path that available frequency gap is maximum from candidate's light path;
S2: if the required error rate of client-requested is less than default error rate threshold value, select low-order-modulated mode, and perform step S4, otherwise execution step S3;
S3: if the jumping figure of light path exceedes default jumping figure threshold value, select low-order-modulated mode, and perform step S4, otherwise select high-order modulating, and perform step S4;
S4: judge whether enough continuous available frequency gaps, if having, perform step S5, otherwise block;
S5: start to select continuous available frequency gap from minimum label, carry out light path foundation according to the modulation system of selecting.
2. the method for claim 1, is characterized in that, described high-order modulating is 16QAM.
3. the method for claim 1, is characterized in that, described low-order-modulated mode is QPSK.
4. the frequency spectrum resource distribution system in elasticity optical-fiber network, is characterized in that, comprising:
Light path is selected module, in the time that client-requested arrives, selects the light path that available frequency gap is maximum from candidate's light path;
Error rate judge module, if be less than default error rate threshold value for the required error rate of client-requested, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise carries out jumping figure judge module;
Jumping figure judge module, if exceed default jumping figure threshold value for the jumping figure of light path, selects low-order-modulated mode, and carries out continuous available frequency gap judge module, otherwise selects high-order modulating, and carries out continuous available frequency gap judge module;
Continuous available frequency gap judge module, for judging whether enough continuous available frequency gaps, if having, carries out light path and sets up module, otherwise blocks;
Light path is set up module, for start to select continuous available frequency gap from minimum label, carries out light path foundation according to the modulation system of selecting.
5. frequency spectrum resource distribution system as claimed in claim 4, is characterized in that, described high-order modulating is 16QAM.
6. frequency spectrum resource distribution system as claimed in claim 4, is characterized in that, described low-order-modulated mode is QPSK.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110404332.2A CN102523068B (en) | 2011-12-07 | 2011-12-07 | Frequency spectrum resource distribution method in elastic optical network and system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110404332.2A CN102523068B (en) | 2011-12-07 | 2011-12-07 | Frequency spectrum resource distribution method in elastic optical network and system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102523068A CN102523068A (en) | 2012-06-27 |
| CN102523068B true CN102523068B (en) | 2014-07-30 |
Family
ID=46293877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110404332.2A Expired - Fee Related CN102523068B (en) | 2011-12-07 | 2011-12-07 | Frequency spectrum resource distribution method in elastic optical network and system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102523068B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103051547B (en) * | 2012-12-24 | 2015-08-05 | 北京邮电大学 | The route of resource perception and frequency spectrum resource allocation method and system in elastic optical network |
| CN103391258B (en) * | 2013-07-03 | 2017-04-19 | 北京邮电大学 | Resource distribution method and device based on distributed fragment concentration ratios |
| CN105634990B (en) * | 2014-11-27 | 2019-09-24 | 南京中兴软件有限责任公司 | Based on the continuous method for obligating resource of time frequency spectrum, device and processor |
| CN105721130A (en) * | 2016-02-23 | 2016-06-29 | 南京邮电大学 | Spectrum distribution method based on sub-band virtual concatenation technology in elastic optical network |
| CN106412728B (en) * | 2016-08-31 | 2019-08-30 | 北京邮电大学 | The routing of multiple domain elastic optical network and frequency spectrum distributing method and the system of attack perception |
| CN108616782B (en) * | 2018-04-03 | 2021-03-02 | 南京邮电大学 | Frequency spectrum allocation method based on disjoint connection group optimization in elastic optical network |
| CN111182379B (en) * | 2020-01-03 | 2021-08-13 | 中原工学院 | Frequency spectrum allocation method for plastic reserved service in elastic optical network |
-
2011
- 2011-12-07 CN CN201110404332.2A patent/CN102523068B/en not_active Expired - Fee Related
Non-Patent Citations (8)
| Title |
|---|
| Algorithms for Maximizing Spectrum Efficiency in Elastic Optical Path Networks that Adopt Distance Adaptive Modulation;T.Takagi;《ECOC 2010》;20100923;全文 * |
| Distance-Adaptive Spectrum Resource Allocation in Spectrum-Sliced Elastic Optcial Path Network;Masahiko Jinno等;《IEEE Communication Magazine》;20100831;全文 * |
| Distance-Adaptive Super-Wavelength Routing in Elastic Optical Path Network (SLICE) with Optical OFDM;H.Takara等;《ECOC 2010》;20100923;全文 * |
| Dynamic Routing and Frequency Slot Assignment for Elastic Optical Path Networks that Adopt Distance Adaptive Modulation;T.Takagi等;《OSA/OFC/NFOCE 2011》;20110310;全文 * |
| H.Takara等.Distance-Adaptive Super-Wavelength Routing in Elastic Optical Path Network (SLICE) with Optical OFDM.《ECOC 2010》.2010, |
| Masahiko Jinno等.Distance-Adaptive Spectrum Resource Allocation in Spectrum-Sliced Elastic Optcial Path Network.《IEEE Communication Magazine》.2010, |
| T.Takagi.Algorithms for Maximizing Spectrum Efficiency in Elastic Optical Path Networks that Adopt Distance Adaptive Modulation.《ECOC 2010》.2010, |
| T.Takagi等.Dynamic Routing and Frequency Slot Assignment for Elastic Optical Path Networks that Adopt Distance Adaptive Modulation.《OSA/OFC/NFOCE 2011》.2011, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102523068A (en) | 2012-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102523068B (en) | Frequency spectrum resource distribution method in elastic optical network and system thereof | |
| CN103051547B (en) | The route of resource perception and frequency spectrum resource allocation method and system in elastic optical network | |
| US20180332373A1 (en) | Dynamic capacity allocation in optical communication networks | |
| CN101048963B (en) | Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system | |
| JP6330170B2 (en) | Time division for low power mode | |
| CN103210613B (en) | Communicator | |
| CN103327501B (en) | Based on the resource allocation methods of distributed fragment concentration degree | |
| US20140269520A1 (en) | System and Method for Determining a Pilot Signal | |
| KR101990827B1 (en) | Method and apparatus for dynamic up-link resource allocation | |
| CN102356576A (en) | OFDM transponder interface with variable bit transfer rate in optical communications systems | |
| EP2658169B1 (en) | Digital subscriber line signal processing method, device and digital subscriber line system | |
| CN101151807B (en) | Exploiting multiuser diversity through phase modulation multiplexing | |
| US20140010539A1 (en) | Methods and systems of specifying coaxial resource allocation across a mac/phy interface | |
| CN101197622A (en) | Band width distribution method and device used for PON coexistence of different transmission rate | |
| JP2012105180A (en) | Optical communication system, station-side communication device and subscriber-side communication device | |
| CN109547876A (en) | A kind of adaptive guard rank method under elastic optical network twin failure | |
| EP2849389A2 (en) | Method and apparatus for allocating bandwidth resources | |
| CN102255841B (en) | Broadcast Control Channel, data channel resource mapping method and device | |
| US11381334B2 (en) | Service signal transmission method and apparatus | |
| CN101448284A (en) | Method and system for constructing channel quality indicator tables for feedback in a communication system | |
| Rodrigues et al. | Crosstalk and fragmentation-aware algorithm for space-division multiplexing elastic optical networks | |
| Radovic et al. | Experimental optimization of power-aware super-channels in elastic optical networks | |
| Guo et al. | Modulation adaptive grooming in green elastic optical networks | |
| CN102347862A (en) | All optical network business restoration method based on band width compression | |
| CN107979874B (en) | Data scheduling method, device and base station for satellite communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |