CN101304332A - Network topological abstract method and apparatus - Google Patents
Network topological abstract method and apparatus Download PDFInfo
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- CN101304332A CN101304332A CNA2008100676678A CN200810067667A CN101304332A CN 101304332 A CN101304332 A CN 101304332A CN A2008100676678 A CNA2008100676678 A CN A2008100676678A CN 200810067667 A CN200810067667 A CN 200810067667A CN 101304332 A CN101304332 A CN 101304332A
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Abstract
The invention discloses a network topology abstract method and a device thereof. The abstract method includes the following steps: a. calculating the connectivity between each two boundary vertexes in all the subnets which are included in the network topology respectively, and determining the abstract edges of the subnet topologies according to the calculation results; b. deleting the non-boundary edges and the non-boundary vertexes in the subnet topologies and preserving the boundary edges, and adding the abstract edges in the subnet topologies. The technical proposal of the invention has the advantages of realizing the abstract and simplification of a complicated network with a plurality of subnets to a simple network.
Description
Technical field
The present invention relates to the communications field, especially a kind of network topological abstract method and device.
Background technology
Along with the continuous development of communication network, the accumulation of networking and the replacement of equipment vendors, the device category of moving in the communication network is increasing, and network size constantly enlarges.
Because region or administrative relation, complicated network is divided into some subnets by level.Because the expansion of network size, route consumption computing time of network level is exponential and increases progressively, and the efficient that makes route calculate faces a severe test.In addition, because the existence of subnet, when plurality of subnets is carried out route calculating from top to bottom, the situation that the route that may occur calculating can not be decomposed in subnet.Therefore, need to realize the abstract simplification of complex network.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of network topological abstract method and device, has realized comprising the abstract simplification of the complex network of some subnets to simple network.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of network topological abstract method may further comprise the steps:
A, in each subnet that network topology comprises, calculate its border vertices connectedness between any two respectively, and determine abstract limit in described each subnet topology according to result of calculation;
Non-boundary edge and non-border vertices in b, described each subnet topology of deletion keep its boundary edge, add described abstract limit simultaneously in described each subnet topology.
In the such scheme, further comprising the steps of before the described step a: discern each subnet topology that described network topology comprises, and boundary edge and border vertices in described each subnet topology.
The abstract device of a kind of network topology comprises:
Connective computing module is used for each sub-net boundary summit connectedness between any two that the computing network topology comprises, and determines abstract limit in described each subnet topology according to result of calculation;
Abstract realization module is used for deleting the non-boundary edge and the non-border vertices of described each subnet topology, keeps its boundary edge, adds the abstract limit that described connective computing module is determined simultaneously in described each subnet topology.
In the such scheme, described device also comprises the network topology identification module, be used to discern each subnet topology that described network topology comprises, and boundary edge and border vertices in described each subnet topology.
In the such scheme, described abstract limit is to connect the limit with two connective border vertices in described each subnet topology.
In the such scheme, the boundary edge in described each subnet topology is the limit of the border vertices of other subnet in the border vertices that connects this subnet and the described network topology; Non-boundary edge is for connecting the limit on this subnet summit.
In the such scheme, the summit of each subnet comprises border vertices and non-border vertices in the described network topology.
Beneficial effect of the present invention mainly shows: technical scheme provided by the invention will comprise the abstract simple network that is reduced to of complex network of some subnets, significantly reduced network complexity, reduced the network size that route is calculated, thereby shortened route computing time, improved the route computational efficiency.
Description of drawings
Fig. 1 is a sub-net topology schematic diagram;
Fig. 2 is a network topological abstract method flow chart of the present invention;
Fig. 3 is the abstract apparatus structure schematic diagram of network topology of the present invention;
Fig. 4 is an abstract preceding network topology schematic diagram in the embodiment of the invention;
Fig. 5 is the topological schematic diagram of network shown in Figure 4 after abstract.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the topological schematic diagram of subnet A, comprises one group of summit and limit.Wherein, the material object of summit correspondence is an equipment or a subnet, comprises border vertices and non-border vertices, and the A2 among Fig. 1, A3, A9 and A10 are border vertices, and all the other are non-border vertices; The limit refers to connect the line on two summits, corresponding material object is optical fiber, cable etc., comprise boundary edge and non-boundary edge, boundary edge is the limit of the border vertices of the border vertices that connects this subnet and other subnet, but not boundary edge is for connecting the limit on this subnet summit, the limit of numbering 1-4 is a boundary edge among Fig. 1, and all the other limits are non-boundary edge.
With reference to Fig. 2, a kind of network topological abstract method may further comprise the steps:
S201: each subnet topology that the recognition network topology comprises, and boundary edge and border vertices in each subnet topology;
S202: in each subnet, calculate its border vertices connectedness between any two respectively, and determine abstract limit in each subnet topology according to result of calculation; With subnet A shown in Figure 1 is example, among its border vertices A2, A3, A9 and the A10, have connective border vertices between any two to being: A2 and A3, A2 and A9, A2 and A10, A3 and A9, A3 and A10, A9 and A10, the abstract limit among the subnet A is and connects the right limit of above-mentioned border vertices;
S203: delete non-boundary edge and non-border vertices in each subnet topology, keep its boundary edge, add abstract limit simultaneously.
So far, network topology is abstract finishes.
With reference to Fig. 3, the abstract device of a kind of network topology comprises:
The network topology identification module is used for each subnet topology that the recognition network topology comprises, and boundary edge and border vertices in each subnet topology;
Connective computing module is used to calculate each sub-net boundary summit connectedness between any two, and determines abstract limit in each subnet topology according to result of calculation;
Abstract realization module is used for deleting the non-boundary edge and the non-border vertices of each subnet topology, keeps its boundary edge, adds the abstract limit that connective computing module is determined simultaneously in each subnet topology.
The implication on abstract limit is repeated no more to describe hereinbefore herein.
Abstract with network topology shown in Figure 4 below is that the invention will be further described for example.
Discern this network and comprise three subnet A, subnet B, subnet C and summit A, Z, 32 on total summit, 46 on limit; Boundary edge is A-C2, C4-B1, C8-A1, C11-A2, B8-A3, B9-A9, A10-Z; Border vertices is C2, C4, B1, C8, A1, C11, A2, B8, A3, B9, A9, A10, A, Z.
Then, in subnet A, subnet B, subnet C, calculate border vertices connectedness between any two respectively, and determine abstract limit in each subnet topology according to result of calculation, wherein,
In subnet C, calculate following border vertices to having connectedness:
C2 and C4, C2 and C11, C2 and C8, C4 and C8, C4 and C11, C8 and C11
In subnet B, calculate following border vertices to having connectedness:
B1 and B8, B1 and B9, B8 and B9
In subnet A, calculate following border vertices to having connectedness:
A1 and A2, A3 and A9, A3 and A10, A9 and A10
At last, delete non-boundary edge and non-border vertices in each subnet topology, obtain network topology as shown in Figure 5 after keeping boundary edge and adding abstract limit, it comprises:
Border vertices: A, Z, C2, C4, B1, C8, A1, C11, A2, B8, A3, B9, A9, A10;
Limit: A-C2, C4-B1, C8-A1, C11-A2, B8-A3, B9-A9, A10-Z, C2-C4, C2-C11, C2-C8, C4-C8, C4-C11, C8-C11.
Amount to 14 on summit, 13 on limit.
If compare with β index, feeder number k, alpha index and the γ index network complexity to the abstract front and back of above topology, then comparing result is as shown in table 1:
| M (limit), n (summit), p (inferior figure) | β | k | α | γ | |
| Before abstract | M＝46，n＝32，p＝1 | 1.4375 | 15 | 0.254237 | 0.511111 |
| After abstract | M＝13，n＝14，p＝1 | 0.928571 | 0 | 0 | 0.361111 |
Table 1
Wherein, β index: line point rate is the average limit number in each summit in the network; β gets 0, represents that no network exists; The β value increases along with the increase of network complexity;
Feeder number k: the loop is a kind of closed path, and its initial point also is a terminal point simultaneously; If network internal storage is in the loop, then the number on limit just must surpass n-p, and n is a number of vertex, and p is inferior figure number;
Alpha index: the ratio between the most loop number that may exist in actual feeder number and the network; Its numerical value change scope is [0,1], and α gets 0, does not have the loop in the expression network; α gets 1, has reached loop number to greatest extent in the expression network.
γ index: the ratio between the maximum number that the actual number of network inner edge and limit may exist; It is a kind of index of estimating network connectivty, and its numerical value change scope is [0,1], and γ gets 0, and is boundless in the expression network, has only isolated vertex to exist; γ gets 1, and all there is the limit that links to each other with other all summits in each summit in the expression network.
As can be seen from Table 1, the present invention has significantly simplified the complexity of network.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (7)
1, a kind of network topological abstract method is characterized in that, may further comprise the steps:
A, in each subnet that network topology comprises, calculate its border vertices connectedness between any two respectively, and determine abstract limit in described each subnet topology according to result of calculation;
Non-boundary edge and non-border vertices in b, described each subnet topology of deletion keep its boundary edge, add described abstract limit simultaneously in described each subnet topology.
2, network topological abstract method as claimed in claim 1 is characterized in that, and is further comprising the steps of before the described step a: discern each subnet topology that described network topology comprises, and boundary edge and border vertices in described each subnet topology.
3, the abstract device of a kind of network topology is characterized in that, comprising:
Connective computing module is used for each sub-net boundary summit connectedness between any two that the computing network topology comprises, and determines abstract limit in described each subnet topology according to result of calculation;
Abstract realization module is used for deleting the non-boundary edge and the non-border vertices of described each subnet topology, keeps its boundary edge, adds the abstract limit that described connective computing module is determined simultaneously in described each subnet topology.
4, the abstract device of network topology as claimed in claim 3, it is characterized in that: described device also comprises the network topology identification module, be used to discern each subnet topology that described network topology comprises, and boundary edge and border vertices in described each subnet topology.
5, the abstract device of network topology as claimed in claim 3 is characterized in that: described abstract limit is to connect the limit with two connective border vertices in described each subnet topology.
6, the abstract device of network topology as claimed in claim 3 is characterized in that: the boundary edge in described each subnet topology is the limit of the border vertices of other subnet in the border vertices that connects this subnet and the described network topology; Non-boundary edge is for connecting the limit on this subnet summit.
7, the abstract device of network topology as claimed in claim 6 is characterized in that: the summit of each subnet comprises border vertices and non-border vertices in the described network topology.
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| WO2019085975A1 (en) * | 2017-11-01 | 2019-05-09 | 新华三技术有限公司 | Network topology display method and network management device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019085975A1 (en) * | 2017-11-01 | 2019-05-09 | 新华三技术有限公司 | Network topology display method and network management device |
| US11240115B2 (en) | 2017-11-01 | 2022-02-01 | New H3C Technologies Co., Ltd. | Network topology display method and network management device |
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