CN102868563B - 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

Sharing memory cross-layer mapping management process

Technical field

The present invention relates to communication and transmit network, especially a kind of sharing memory cross-layer mapping management process.

Background technology

Network based on transport network, carries IP data service, speech business and individual/family/group big customer business, and the height of service security depends on the reliability transmitting network.In order to improve network reliability; ensure service security, in existing network, the most reliable mode is exactly set up work for service request and protect the route of two physical separation, once Work route breaks down; business just can be switched to protection route immediately and get on, thus avoids the interruption of business.The physical separation of Work route and protection route must rely on the setting of shared risk link group (srlg).

Sharing memory is the one group of link be carried on same underlying network resources, and when this underlying network resources breaks down, this group link all lost efficacy, so must avoid active and standby route in same sharing memory when arranging business route.Therefore, when the network planning and service fulfillment, management and the setting of sharing memory just seem particularly important.One-to-many or many-to-one relation is there is between etale topology and upper etale topology due to lower in existing network, namely one section of optical cable carries many WDM/OTN links, article one, WDM/OTN link bearer is on multistage optical cable, and different optical cables also likely shares same section of bottom physical resource, cause division and the Comparison of Management complexity of WDM/OTN layer network sharing memory thus.Meanwhile, along with the expansion of network size and the quick increase of dimension, circuit change between two nodes, by the change of topological relation caused between multiple node, thus substantially increases the complexity of sharing memory management.At present, setting and the management of sharing memory are carried out often through artificial investigation and analysis, not only workload is large for this method, efficiency is low, and the accuracy of management is not high yet, and the circuit between each node in topological network cannot be accomplished optimized configuration.

Summary of the invention

The object of the invention is to solve above-mentioned deficiency, and provide one can manage sharing memory better, the physical independence of the active and standby route of effective guarantee business, simplify sharing memory analytical work, improve the sharing memory cross-layer mapping management process of sharing memory validity.

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

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

Step 2: import optical cable topology and import; Include m bar cable link in optical cable topology, be respectively F ₁, F ₂, F ₃f _m.Meanwhile, the routing table of cable link is imported;

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

Step 4: the size comparing i and n, if i≤n, then analyze the route of optical cable topology, 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, repeat step 4, until i>n, derive the SRLG form of optical cable layer;

Step 5: import WDM/OTN topology, include k bar cable link in WDM/OTN topology, be respectively W ₁, W ₂, W ₃w _k, import WDM/OTN Link Routing Table simultaneously;

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

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

Wherein the set of all lower floors topological node should comprise the node of etale topology.

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

Sharing memory cross-layer mapping management process designed by the present invention, based on bearing relation between above etale topology and bottom topology, the SRLG of upper layer network is divided by the method for automatic mapping, efficiently solve and enjoy risk link group large, the artificial analyzing responding speed of management difficulty is set not and the problem such as accuracy is not high, ensure that the active and standby route of business is independent with risk link association clearly, improve the fail safe of business.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of sharing memory cross-layer mapping management process of the present invention;

Fig. 2 is bottom physical topology figure;

Fig. 3 is optical cable topological diagram;

Fig. 4 is 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 sharing memory 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 sharing memory 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 sharing memory of embodiment 2 arranges table;

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

Embodiment

Below by embodiment, the invention will be further described by reference to the accompanying drawings.

Embodiment 1:

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

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

Step 2: 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: arrange variable i=1, i represents the number of times of projection optical cable layer shared risk link.

Step 4:i≤5, by all by pipeline P _ioptical cable paragraph be set to the shared risk link of same optical cable layer, called after SRLG (f) _i, with seasonal i=i+1, repeat step 4, till i>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, in WDM/OTN topology, WDM/OTN paragraph has 5, is respectively W ₁, W ₂, W ₃w ₅, the carrying route of WDM/OTN link as shown in Figure 8 simultaneously.

Step 6: arrange variable j=1, j represents the number of times mapping WDM/OTN layer shared risk link.

Step 7:j≤6, by SRLG (f) _jin WDM/OTN link paragraph that all cable resources carry be set to same WDM/OTN layer SRLG, called after SRLG (w) _j, with seasonal j=j+1, repeat step 7, till j>6, obtain the SRLG form of WDM/OTN layer, as shown in Figure 9.

Wherein need satisfied following precondition:

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

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

After operating above, the shared risk link of cable network and WDM/OTN network arranges and all completes, and concrete grouping situation as shown in figures 7 and 9.At this moment, if there is the business of A-C, service protection type is (1+1) protection, and arrange result according to SRLG, this business only can arrange primary route on W1 link, and alternate routing does not have, and independently resource is optional with primary route physics.

Embodiment 2

As shown in Figure 5, the sharing memory cross-layer mapping management process that the present embodiment describes, on the basis of embodiment 1, C-E node adds a route P ₆, then bottom physical topology changes to Fig. 5, and the carrying routing change of fiber cable network is Figure 10.Again according to the prompting of the inventive method, repeat step 1 to the operation of step 7, obtain cable network and the new shared risk link form of WDM/OTN network, as is illustrated by figs. 11 and 12.Arrange route again to business A-C, under the prerequisite that channel resource is enough, the primary route of A-C is W1, and alternate routing is W2-W3, and service security grade obtains effective raising.

Claims (1)

1. a sharing memory 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: bottom physical topology is imported, successively by each paragraph called after P ₁, P ₂, P ₃p _n, n is the paragraph sum of bottom physical resource;

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

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

Step 4: the size comparing i and n, if i≤n, then analyze the route of optical cable topology, 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, repeat step 4, until i>n, derive the SRLG form of optical cable layer;

Step 5: import WDM/OTN topology, include k bar cable link in WDM/OTN topology, be respectively W ₁, W ₂, W ₃w _k, import WDM/OTN Link Routing Table simultaneously;

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

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

Wherein the set of all lower floors topological node should comprise the node of etale topology.