CN104202262A - Method and device for spectrum allocation in spectral flexible optical network - Google Patents
Method and device for spectrum allocation in spectral flexible optical network Download PDFInfo
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Abstract
The invention discloses a method and a device for spectrum allocation in a spectral flexible optical network and relates to the technical field of the spectral flexible optical networks. According to the method and the device for spectrum allocation in the spectral flexible optical network, operations, topologies and spectral gaps all classified, and then the spectral gaps are selected by use of the corresponding topologies according to the types of the operations; as a result, the regularization of spectrum occupation is realized, spectrum fragments are reduced and the congestion probability is reduced.
Description
Technical field
The present invention relates to flexible spectrum optical-fiber network technical field, particularly frequency spectrum distributing method and the device in a kind of flexible spectrum optical-fiber network.
Background technology
The control and management to upper strata when obtaining efficient spectrum efficiency and flexibility of flexible spectrum optical-fiber network has brought many new demands, such as adaptive spectrum allocative decision, multi-service adaptation rate scheme etc.Wherein, route and spectrum allocation may problem, the self-adapted service bandwidth demand mode of take is set up a light path distribute suitable messaging parameter as it end to end, is the key problem of network management control.The achievement in research that oneself has can roughly be divided three classes: static routing and spectrum allocation may planning, and quasistatic route and frequency spectrum resource assessment, dynamic route is set up and frequency spectrum distributing method.In dynamic RSA Study on Problems, due to dynamic Jian Chai road in network, through after a period of time, in frequency spectrum resource, can there are a lot of frequency spectrum fragments.The existence of these frequency spectrum fragments makes network to distribute enough large frequency spectrum blocks for follow-up connection request, thereby connection request is obstructed.Blocking rate is the index of weighing dynamic RSA Algorithm performance, and blocking rate is less, and frequency spectrum fragment degree is lower, and the performance of algorithm is higher.
Present stage, has proposed many algorithms for RSA problem, comprises Routing Optimization Algorithm, realizes choosing of optimal path, and spectrum allocation may optimized algorithm, realizes the reasonable use of frequency spectrum resource, reduces frequency spectrum fragment, reduces blocking rate, thereby improve spectrum efficiency.And for utilizing different business bandwidth characteristic reasonable distribution frequency spectrum resource just just to start to improve the research of the algorithm of spectrum efficiency, mainly comprise people's researchs such as Song Kangjing, Chen Bowen, its multiple relation based on amount of bandwidth, frequency spectrum gap is unified to subregion, by the business that has multiple relation is relatively concentrated, realize frequency spectrum and take regularization, reduce blocking rate.
Summary of the invention
The regularization taking in order to realize frequency spectrum, reduces frequency spectrum fragment, and reduces blocking rate, the invention provides the frequency spectrum distributing method in a kind of flexible spectrum optical-fiber network, said method comprising the steps of:
The business that k kind business in flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold is as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
The frequency spectrum gap that the centre frequency of T frequency spectrum gap of each link in described flexible spectrum optical-fiber network is less than to predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
Choose two connected graphs in described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
When M class business is asked, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
Wherein, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing;
If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
Wherein, described method also comprises: after the frequency spectrum gap of business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, tear road after business is transmitted open, and discharge the frequency spectrum gap of distributing.
Wherein, described method also comprises: if the request of certain business is not finally allocated successfully yet, block this business.
Wherein, in described flexible spectrum optical-fiber network, each link has weights;
Carry out link while choosing, according to the weights of each link, choose the link of shortest path.
The invention also discloses the spectrum allocation may device in a kind of flexible spectrum optical-fiber network, described device comprises:
Delineation of activities module, for the business that the k kind business of flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold, as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
Frequency spectrum gap is divided module, the frequency spectrum gap that is used for the centre frequency of T frequency spectrum gap of described each link of flexible spectrum optical-fiber network to be less than predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
Topology is divided module, for choosing two connected graphs of described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
Service distribution module for when M class business is asked, is carried out link and is chosen, and the link of choosing carried out to the distribution of category-A frequency spectrum gap in described topological a; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
Wherein, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business in described service distribution module to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing; If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
Wherein, in described service distribution module, after frequency spectrum gap corresponding to business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, after business is transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
Wherein, in described service distribution module, the request of certain business is not finally allocated successfully yet, blocks this business.
Wherein, in described flexible spectrum optical-fiber network, each link has weights;
Described service distribution module is carried out link while choosing, and chooses the link of shortest path according to the weights of each link.
The present invention is by business, topological sum frequency spectrum gap are all classified, then adopts corresponding topology to choose frequency spectrum gap according to the classification of business, realized the regularization that frequency spectrum takies, and reduced frequency spectrum fragment, and reduced blocking rate.
Accompanying drawing explanation
Fig. 1 is the flow chart of the frequency spectrum distributing method in the flexible spectrum optical-fiber network of one embodiment of the present invention;
Fig. 2 (a) is the topological diagram of the flexible spectrum optical-fiber network of an embodiment of the present invention;
Fig. 2 (b) is the schematic diagram of the two dimensional spectrum in the flexible spectrum optical-fiber network of an embodiment of the present invention;
Fig. 3 is the classification schematic diagram of the frequency spectrum gap of an embodiment of the present invention;
Fig. 4 (a) is the schematic diagram of topological a in the flexible spectrum optical-fiber network of an embodiment of the present invention;
Fig. 4 (b) is the schematic diagram of topological b in the flexible spectrum optical-fiber network of an embodiment of the present invention;
Fig. 4 (c) is the classification schematic diagram of the link of an embodiment of the present invention;
Fig. 4 (d) is the classification schematic diagram of the two dimensional spectrum in the flexible spectrum optical-fiber network of an embodiment of the present invention;
Fig. 5 (a) is that the link of the business 1 of an embodiment of the present invention is chosen schematic diagram;
Fig. 5 (b) is that the frequency spectrum gap of the business 1 of an embodiment of the present invention is distributed schematic diagram;
Fig. 5 (c) is that the link of the business 2 of an embodiment of the present invention is chosen schematic diagram;
Fig. 5 (d) is that the frequency spectrum gap of the business 2 of an embodiment of the present invention is distributed schematic diagram;
Fig. 6 (a) is that frequency spectrum resource of the prior art distributes schematic diagram;
Fig. 6 (b) is that the frequency spectrum resource of an embodiment of the present invention distributes schematic diagram;
Fig. 7 is the structured flowchart of the spectrum allocation may device in the flexible spectrum 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. 1 is the flow chart of the frequency spectrum distributing method in the flexible spectrum optical-fiber network of one embodiment of the present invention, said method comprising the steps of:
101: the business that the k kind business in flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold is as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
102: the frequency spectrum gap that the centre frequency of T frequency spectrum gap of each link in described flexible spectrum optical-fiber network is less than to predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
103: choose two connected graphs in described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
104: when M class business is asked, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
Wherein, between step 101,102 and 103, do not have sequencing, no matter with which kind of, sequentially carry out, all can realize the present invention.
The frequency spectrum gap of the business in step 104 is unallocated when successful, and can carry out sub-distribution again to it, thereby realize making full use of of frequency spectrum gap, preferably, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing; If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
For assurance business is after frequency spectrum gap is allocated successfully, no longer continue to distribute, preferably, in step 104, after the frequency spectrum gap of business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, after business is transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
For avoiding certain traffic assignments frequency spectrum gap, unallocated success always, and cause other business to transmit, preferably, described method also comprises: if the request of certain business is not finally allocated successfully yet, block this business.
Because the node relating in flexible spectrum optical-fiber network is when many, business may relate to mulitpath, can be by each link in described flexible spectrum optical-fiber network is arranged to weights, to adapt to different demands, preferably, in described flexible spectrum optical-fiber network, each link has weights;
In step 104, carry out link while choosing, according to the weights of each link, choose the link of shortest path.
Embodiment
With a specific embodiment, the present invention is described below, but does not limit protection scope of the present invention.The present embodiment is realized spectrum allocation may by two dimensional spectrum, establishes flexible spectrum optical-fiber network as shown in Fig. 2 (a), comprises 4 optical nodes, and 4 optical nodes interconnect by 6 links.
Two dimensional spectrum refers to the 2-d spectrum resource space that flexible spectrum optical-fiber network link space (the first dimension) and frequency spectrum gap space (the second dimension) form.Because the frequency spectrum gap length degree of arbitrary link is all consistent with spectral range, so the frequency spectrum resource that frequency spectrum gap is unit representation the whole network if take can be expressed as a two dimensional spectrum, as shown in Fig. 2 (b).If there are 4 kinds of business in flexible spectrum optical-fiber network, be respectively 10Gb/s, 40Gb/s, l00Gb/s and 400Gb/s, required frequency spectrum broadband corresponds to 25GHz, 50GHz, 50GHz, 75GHz, and frequency spectrum gap demand number is respectively { 1,2,2,3}.
The method of the present embodiment specifically comprises:
The 1st step: business classification.If default frequency spectrum gap demand threshold | B
n|=2.5 (2<|B
n| <3), the business that respectively frequency spectrum gap demand number is less than and is greater than this threshold value is divided into two classes: M class (comprising 1,2) and N class (comprising 3).
The 2nd step: divide two dimensional spectrum.In this step, specifically comprise the 2.1st step and the 2.2nd step:
The 2.1st step: frequency spectrum gap spatial classification.If every link frequency spectrum gap number is 10 in flexible spectrum optical-fiber network, centre frequency frequency spectrum gap is from small to large followed successively by S1, S2, S3 ... S10.If predeterminated frequency threshold value is w
n(S4<w
n<S5), according to predeterminated frequency threshold value, described frequency spectrum gap is divided into two classes: category-A (comprising S1, S2, S3, S4) and category-B (comprising S5, S6, S7, S8, S9, S10), as shown in Figure 3.
The 2.2nd step: link spatial classification.Choose two connected graphs in described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network, described topological a is with reference to Fig. 4 (a), and described topological b is with reference to Fig. 4 (b).The link that topological a is comprised is as a class, and the link that topological b comprises is as b class, as shown in Fig. 4 (c).Now whole two dimensional spectrum forms four classes: Aa, Bb, Ab, Ba, as shown in Fig. 4 (d).
The 3rd step: frequency spectrum gap is distributed.For inhomogeneity business is carried out the selection in path and the distribution of frequency spectrum resource.The following business 1,2 of take is example:
Business 1: frequency spectrum gap demand number slots=2; Optical node 1 → optical node 4;
Now, because the frequency spectrum gap demand number of business 1 is 2, so can determine that it is M business, with reference to Fig. 5 (a), from topological a, carry out the path that link is chosen optical node 1 → optical node 4, can determine that a class link of choosing is 1 and 2, now from category-A frequency spectrum gap (comprising S1, S2, S3, S4), distribute S1 and S2 as business 1 assigned frequency spectrum gap from Aa class, with reference to Fig. 5 (b);
Business 2: frequency spectrum gap demand number slots=3; Optical node 4 → optical node 1;
Now, because the frequency spectrum gap demand number of business 2 is 3, so can determine that it is N business, with reference to Fig. 5 (c), from topological b, carry out the path that link is chosen optical node 4 → optical node 1, can determine that the link of choosing is 6, now from category-B frequency spectrum gap (comprising S5, S6, S7, S8, S9, S10), distribute S8, S9 and S10 as business 2 assigned frequency spectrum gap from Bb class, with reference to Fig. 5 (d).
The 4th step: road construction He Chai road.After the frequency spectrum gap of business 1 and business 2 is allocated successfully, according to the link chosen, carry out road construction, and carry out the transmission of business 1 and business 2 according to the frequency spectrum gap of distributing, after business 1 and business 2 are transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
Frequency spectrum distributing method for the ease of frequency spectrum distributing method more of the prior art (the first frequency spectrum resource allocation method that adapts to) and the present embodiment, state after distributing with the frequency spectrum resource to 10 business below compares, known according to Fig. 6 (a) and Fig. 6 (b), the frequency spectrum of the frequency spectrum distributing method of the present embodiment takies obviously rule more, and reduced frequency spectrum fragment, and reduced blocking rate.
Wherein, establishing these 10 business is respectively:
Business 1:slots=2; End 1 → end 4 business 2:slots=3; End 4 → end 1
Business 3:slots=3; End 1 → end 4 business 4:slots=3; End 1 → end 3
Business 5:slots=3; End 3 → end 2 business 6:slots=1; End 3 → end 4
Business 7:slots=2; End 4 → end 3 business 8:slots=3; End 1 → end 2
Business 9:slots=1; End 2 → end 1 business 10:slots=1; End 3 → end 4
The invention also discloses the spectrum allocation may device in a kind of flexible spectrum optical-fiber network, with reference to Fig. 7, described device comprises:
Delineation of activities module, for the business that the k kind business of flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold, as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
Frequency spectrum gap is divided module, the frequency spectrum gap that is used for the centre frequency of T frequency spectrum gap of described each link of flexible spectrum optical-fiber network to be less than predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
Topology is divided module, for choosing two connected graphs of described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
Service distribution module for when M class business is asked, is carried out link and is chosen, and the link of choosing carried out to the distribution of category-A frequency spectrum gap in described topological a; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
Preferably, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business in described service distribution module to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing; If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
Preferably, in described service distribution module, after frequency spectrum gap corresponding to business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, after business is transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
Preferably, in described service distribution module, the request of certain business is not finally allocated successfully yet, blocks this business.
Preferably, in described flexible spectrum optical-fiber network, each link has weights;
Described service distribution module is carried out link while choosing, and chooses the link of shortest path according to the weights of each link.
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 (10)
1. the frequency spectrum distributing method in flexible spectrum optical-fiber network, is characterized in that, said method comprising the steps of:
The business that k kind business in flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold is as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
The frequency spectrum gap that the centre frequency of T frequency spectrum gap of each link in described flexible spectrum optical-fiber network is less than to predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
Choose two connected graphs in described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
When M class business is asked, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
2. the method for claim 1, is characterized in that, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing;
If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
3. method as claimed in claim 2, is characterized in that, described method also comprises: after the frequency spectrum gap of business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, after business is transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
4. method as claimed in claim 2, is characterized in that, described method also comprises: if the request of certain business is not finally allocated successfully yet, block this business.
5. the method as described in any one in claim 1～4, is characterized in that, in described flexible spectrum optical-fiber network, each link has weights;
Carry out link while choosing, according to the weights of each link, choose the link of shortest path.
6. the spectrum allocation may device in flexible spectrum optical-fiber network, is characterized in that, described device comprises:
Delineation of activities module, for the business that the k kind business of flexible spectrum optical-fiber network is less than to default frequency spectrum gap demand threshold, as M class business, and using other business in described k kind business as N class business, described k is not less than 2 integer;
Frequency spectrum gap is divided module, the frequency spectrum gap that is used for the centre frequency of T frequency spectrum gap of described each link of flexible spectrum optical-fiber network to be less than predeterminated frequency threshold value is as category-A frequency spectrum gap, and using other frequency spectrum gaps in described T frequency spectrum gap as category-B frequency spectrum gap, described T is not less than 2 integer;
Topology is divided module, for choosing two connected graphs of described flexible spectrum optical-fiber network, and using described two connected graphs respectively as topological a and topological b, the link set of described topological a and topological b has comprised the whole links in described flexible spectrum optical-fiber network;
Service distribution module for when M class business is asked, is carried out link and is chosen, and the link of choosing carried out to the distribution of category-A frequency spectrum gap in described topological a; When N class business is asked, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap.
7. device as claimed in claim 6, is characterized in that, if the distribution of category-B frequency spectrum gap is carried out in the unallocated success of M class business in described service distribution module to the link of choosing; If be not allocated successfully yet, in described topological b, carry out link and choose, and the link of choosing is carried out to the distribution of category-A frequency spectrum gap, if the distribution of category-B frequency spectrum gap is carried out in unallocated success to the link of choosing; If the distribution of category-A frequency spectrum gap is carried out in success that N class business is unallocated to the link of choosing; If be not allocated successfully yet, in described topological a, carry out link and choose, and the link of choosing is carried out to the distribution of category-B frequency spectrum gap, if the distribution of category-A frequency spectrum gap is carried out in unallocated success to the link of choosing.
8. device as claimed in claim 7, it is characterized in that, in described service distribution module, after frequency spectrum gap corresponding to business is allocated successfully, according to the link of choosing, carry out road construction, and carry out business transmission according to the frequency spectrum gap of distributing, after business is transmitted, tear road open, and discharge the frequency spectrum gap of distributing.
9. device as claimed in claim 7, is characterized in that, in described service distribution module, the request of certain business is not finally allocated successfully yet, blocks this business.
10. the device as described in any one in claim 6～9, is characterized in that, in described flexible spectrum optical-fiber network, each link has weights;
Described service distribution module is carried out link while choosing, and chooses the link of shortest path according to the weights of each link.
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| CN106992945A (en) * | 2017-05-21 | 2017-07-28 | 北京工业大学 | A kind of optical-fiber network frequency spectrum resource asymmetric distribution method and apparatus |
| CN108810672A (en) * | 2018-05-20 | 2018-11-13 | 北京工业大学 | A kind of optical-fiber network modulation format and frequency spectrum resource asymmetric distribution method and device |
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