CN102868563A - Cross layer mapping management method of share risk link group - Google Patents

Abstract

The invention relates to a cross layer mapping management method of a share risk link group. The cross layer mapping management method includes counting bottom layer physical topology sections, counting optical cable topology links and counting wavelength division multiplex/ optical transport network (WDM/OTN) topology optical cable sections, then is carried out in six steps, and finally a share risk link group (SRLG) table of a WDM/OTN layer and an SRLG table of an optical cable layer are obtained. According to the cross layer mapping management method of the share risk link group, the bearing relation between an upper layer topology and a bottom layer topology is adopted as the basis, the SRLG of an upper layer network is divided in an automatic mapping method, the problems of large arrangement and management difficulty of the share risk link group, slow human analysis response speed, not high accuracy and the like are effectively solved, main and standby routers of services are ensured to be independent by aid of clear risk link correlation, and service safety is improved.

Description

Shared risk link group cross-layer mapping management process

Technical field

The present invention relates to communication and transmit network, especially a kind of shared risk link group cross-layer mapping management process.

Background technology

Transport network is being carried IP data service, speech business and the individual/family/big customer of group business as basic network, and the height of service security depends on the reliability that transmits network.In order to improve network reliability; ensure service security, the most reliable mode is exactly to set up the route of work and two physical separation of protection for service request in the existing network, in case Work route breaks down; the professional protection route that just can be switched to immediately gets on, thereby avoids professional interruption.The physical separation of Work route and protection route must rely on the setting of shared risk link group (srlg).

The shared risk link group is the one group of link that is carried on the same lower floor Internet resources, and when this layer network resource broke down, this group link all lost efficacy, so must avoid active and standby route in same shared risk link group when arranging professional route.Therefore, when the network planning and service fulfillment, the management of shared risk link group and setting just seem particularly important.Owing to exist one-to-many or many-to-one relation between lower etale topology and the upper etale topology in the existing network, namely carry many WDM/OTN links on one section optical cable, article one, the WDM/OTN link bearer is on the multistage optical cable, and different optical cables also might share same section bottom physical resource, causes thus the division of WDM/OTN layer network shared risk link group and Comparison of Management complicated.Simultaneously, along with the expansion of network size and the quick increase of dimension, circuit changes between two nodes, will cause the variation of the topological relation between a plurality of nodes, thereby has greatly improved the complexity of shared risk link group management.At present, the setting of shared risk link group and management are often undertaken by artificial investigation and analysis, not only workload is large for this method, efficient is low, and the accuracy of management is not high yet, and the circuit between each node in the topological network can't be accomplished optimized configuration.

Summary of the invention

The objective of the invention is in order to solve above-mentioned deficiency, and provide a kind of shared risk link group of managing better, effectively guarantee the physical independence of professional active and standby route, simplify the analytical work of shared risk link group, improve the shared risk link group cross-layer mapping management process of shared risk link group validity.

In order to achieve the above object, the shared risk link group cross-layer mapping management process that the present invention is designed comprises statistics bottom physical topology hop count, statistics optical cable topology number of links, and then statistics WDM/OTN topology optical cable hop count enters the following step:

Step 1: the bottom physical topology is imported, successively with each paragraph called after P ₁, P ₂, P ₃P _n, n is the paragraph sum of bottom physical resource;

Step 2: import the optical cable topology and import; Include m bar cable link in the optical cable topology, be respectively F ₁, F ₂, F ₃F _mSimultaneously, import the routing table of cable link;

Step 3: variable i is set, and the initial value of i is 1;

Step 4: the size of i and n relatively, if i≤n then analyzes the route of optical cable topology, the retrieval routing table, all optical cable paragraph F by bottom physical resource Pi are set to optical cable layer SRLG (f) i, with seasonal i=i+1, repeating step 4 is until i〉n, the SRLG form of derivation optical cable layer;

Step 5: import the WDM/OTN topology, include k bar cable link in the WDM/OTN topology, be respectively W ₁, W ₂, W ₃W _k, import simultaneously WDM/OTN link routing table;

Step 6: variable j is set, and the initial value of j is 1;

Step 7: the size that compares j and n, if j≤n, the route of analysis and arrangement WDM/OTN network link then, the retrieval routing table, the WDM/OTN link paragraph that carries on all cable resources in SRLG (f) j is set to WDM/OTN layer SRLG (w) j, with seasonal j=j+1, and repeating step 7, until j〉n, the SRLG form of derivation WDM/OTN layer;

Wherein the set of all lower floor's topological nodes should comprise the node of etale topology.

Bottom physical topology in the step 1 of the present invention comprises pipeline, direct-burried, the related bottom physical resource of different fiber cable laying modes such as built on stilts.

The shared risk link group cross-layer mapping management process that the present invention is designed, bearing relation between above etale topology and the bottom topology is the basis, divide the SRLG of upper layer network by the method for automatic mapping, efficiently solve and enjoy that the risk link group arranges large, the artificial analyzing responding speed of management difficulty not and the problem such as accuracy is not high, guaranteed that with risk link association clearly professional active and standby route is independent, improved professional fail safe.

Description of drawings

Fig. 1 is the schematic flow sheet of shared risk link group cross-layer mapping management process of the present invention;

Fig. 2 is bottom physical topology figure;

Fig. 3 is the optical cable topological diagram;

Fig. 4 is the WDM/OTN topological diagram;

Fig. 5 is the bottom physical topology figure of embodiment 2;

Fig. 6 is the optical cable paragraph routing table of embodiment 1;

Fig. 7 is that the shared risk link group of the fiber cable network of embodiment 1 arranges table;

Fig. 8 is the WDM/OTN paragraph routing table of embodiment 1;

Fig. 9 is that the shared risk link group of the WDM/OTN network of embodiment 1 arranges table;

Figure 10 is the optical cable paragraph routing table of embodiment 2;

Figure 11 is that the fiber cable network shared risk link group of embodiment 2 arranges table;

Figure 12 is the WDM/OTN network risks link group setting of embodiment 2.

Embodiment

The invention will be further described by reference to the accompanying drawings below by embodiment.

Embodiment 1:

As shown in Figure 1, the shared risk link group cross-layer mapping management process that present embodiment is described comprises statistics bottom physical topology hop count, statistics optical cable topology number of links, and then statistics WDM/OTN topology optical cable hop count enters the following step:

Step 1: analyze the bottom physical topology ₁, as shown in Figure 2, bottom physical topology paragraph has 5 sections, successively with each paragraph called after P of pipeline ₁, P ₂, P ₃P ₅

Step 2: such as the optical cable topology of Fig. 3, optical cable has 4 paragraphs, is respectively F ₁, F ₂, F ₃, F ₄, the carrying route of optical cable as shown in Figure 6 simultaneously.

Step 3: variable i=1 is set, and i represents the number of times of projection optical cable layer shared risk link.

Pipeline P is passed through with all in step 4:i≤5 _iThe optical cable paragraph be set to the shared risk link of same optical cable layer, called after SRLG (f) _i, with seasonal i=i+1, repeating step four is until i〉and till 5, obtain the shared risk link form of optical cable layer, as shown in Figure 7.

Step 5: WDM/OTN topology as shown in Figure 4, the WDM/OTN paragraph has 5 in the WDM/OTN topology, is respectively W ₁, W ₂, W ₃W ₅, the carrying route of WDM/OTN link as shown in Figure 8 simultaneously.

Step 6: variable j=1 is set, and j represents to shine upon the number of times of WDM/OTN layer shared risk link.

Step 7:j≤6 are with SRLG (f) _jIn the WDM/OTN link paragraph that carries on all cable resources be set to same WDM/OTN layer SRLG, called after SRLG (w) _j, with seasonal j=j+1, repeating step 7 is until j〉and till 6, obtain the SRLG form of WDM/OTN layer, as shown in Figure 9.

Wherein need satisfy following precondition:

First: the set of lower floor's topological node should comprise all nodes of etale topology;

Second: the interlayer routing relation between necessary clear and definite bottom physical resource and optical cable and optical cable and the WDM/OTN.

After the above operation of process, the situation of specifically dividing into groups such as Fig. 7 and shown in Figure 9 are all finished in the shared risk link setting of cable network and WDM/OTN network.At this moment, if the business of A-C occurs, the service protection type is (1+1) protection, according to SRLG the result is set, and this business only can arrange primary route at the W1 link, and independently resource is optional with primary route physics and alternate routing does not have.

Embodiment 2

As shown in Figure 5, the shared risk link group cross-layer mapping management process that present embodiment is described, on the basis of embodiment 1, the C-E node has increased a route P ₆, then the bottom physical topology changes to Fig. 5, and the carrying routing change of fiber cable network is Figure 10.According to the prompting of the inventive method, repeating step 1 obtains the new shared risk link form of cable network and WDM/OTN network, such as Figure 11 and shown in Figure 12 to the operation of step 7 again.Arrange route again for professional A-C, under the enough prerequisite of channel resource, the primary route of A-C is W1, and alternate routing is W2-W3, and the service security grade has obtained effective raising.

Claims (1)

1. a shared risk link group cross-layer mapping management process comprises statistics bottom physical topology hop count, statistics optical cable topology number of links, and statistics WDM/OTN topology optical cable hop count is characterized in that:

Step 1: the bottom physical topology is imported, successively with each paragraph called after P ₁, P ₂, P ₃P _n, n is the paragraph sum of bottom physical resource;

Step 2: import the optical cable topology and import; Include m bar cable link in the optical cable topology, be respectively F ₁, F ₂, F ₃F _mSimultaneously, import the routing table of cable link;

Step 3: variable i is set, and the initial value of i is 1;

Step 4: the size of i and n relatively, if i≤n then analyzes the route of optical cable topology, the retrieval routing table, with all by bottom physical resource P _iOptical cable paragraph F be set to optical cable layer SRLG (f) _i, with seasonal i=i+1, repeating step 4 is until i〉and n, the SRLG form of derivation optical cable layer;

Step 5: import the WDM/OTN topology, include k bar cable link in the WDM/OTN topology, be respectively W ₁, W ₂, W ₃W _k, import simultaneously WDM/OTN link routing table;

Step 6: variable j is set, and the initial value of j is 1;

Step 7: compare the size of j and n, if j≤n, then the route of analysis and arrangement WDM/OTN network link is retrieved routing table, with SRLG (f) _jIn the WDM/OTN link paragraph that carries on all cable resources be set to WDM/OTN layer SRLG (w) _j, with seasonal j=j+1, repeating step 7 is until j〉and n, the SRLG form of derivation WDM/OTN layer;

Wherein the set of all lower floor's topological nodes should comprise the node of etale topology.

Images