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Multi-domain optical network security multicast routing method based on distributed PCE

A secure multicast and distributed technology, applied in the direction of data exchange network, multiplexing system selection device, digital transmission system, etc., can solve the problem that multicast routing cannot resist security threats well

Active Publication Date: 2020-04-17
ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-domain optical network security multicast routing method based on distributed PCE, to solve the problem that the multi-domain optical network multicast routing method in the prior art cannot be directly applied to the distributed PCE architecture. In the domain optical network, the obtained multicast route cannot resist security threats well

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  • Multi-domain optical network security multicast routing method based on distributed PCE
  • Multi-domain optical network security multicast routing method based on distributed PCE
  • Multi-domain optical network security multicast routing method based on distributed PCE

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Embodiment 1

[0090] This embodiment discloses a multi-domain optical network secure multicast routing method based on distributed PCE, which is used to obtain a secure multicast tree from a source node to a destination node in a multi-domain optical network. The multi-domain optical network includes multiple domains, the domain includes multiple nodes, and the nodes include input nodes and output nodes;

[0091] In this example, if Figure 11 The shown multi-domain optical network includes D1, D2 and D3, three domains, the source node A is located in the D1 domain, and the destination node B is located in the D3 domain, now it is necessary to find the multicast tree from the source node A to the destination node B, In the current multi-domain optical network, each domain includes multiple nodes. The nodes in these domains include input nodes and output nodes. Both input nodes and output nodes are boundary nodes of this domain. The input nodes of one domain are connected, and the output no...

Embodiment 2

[0184] Combined with reality in this embodiment, such as figure 2 As shown, given a multicast request (m 1 :m 10 ,m 12 ,m 15 ), the method provided by the present invention is illustrated by an example, and the lowest-cost multicast tree satisfying the trust value and wavelength constraints is calculated. first m 1 Send the path calculation request message to the PCE 1 , PCE 1 、PCE 2 、PCE 3 and PCE 4 Through mutual cooperation to learn m 10 、m 12 、m 15 The domains are D3 and D4. m 12 For example, m 10 and m 15 The path calculation process of m 12 same. Each PCE cooperates with each other to decompose the abstract multicast tree T" into two parts, that is, dL composed of D1-D2-D3 1 with dL consisting of D1-D4-D3 2 . for dL 1 , using the node trust value calculation method, PCE 1 、PCE 2 and PCE 3 Collaborate with each other to calculate their respective trust values, and then get dL 1 trust value. L 2 Calculation method and dL 1 same. Then, through ...

Embodiment 3

[0189] In this embodiment, the correctness and time complexity of the method provided by the present invention are analyzed.

[0190] Theorem 4.1: The method provided by the present invention can solve the problem of secure multicast routing calculation in multi-domain optical networks under the distributed PCE architecture.

[0191] Proof: The proof of Theorem 4.1 can be transformed into whether it satisfies the description conditions and objectives of multi-domain optical network security multicast routing under the distributed PCE architecture. For condition ①, both the inter-domain multicast tree and the intra-domain multicast tree are initialized to include the source node, and after the calculation process of the multicast tree in step 4 and step 5 of the method, all destination nodes have been traversed, so the condition ① can be satisfied; For the intra-domain and inter-domain trust value constraints in the condition ②, the present invention judges the trust value cons...

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Abstract

The invention discloses a multi-domain optical network security multicast routing method based on distributed PCE. The method is used for planning a multicast tree from a source node to a destinationnode in a multi-domain optical network. Trust management and an improved ant colony method are combined on the basis of constructing a distributed PCE multicast routing model, and damage behaviors ofmalicious nodes are prevented while routing calculation is carried out. Analysis and experiment results show that compared with a typical multicast routing method, the method achieves comprehensive and excellent performance in the aspects of convergence, multicast tree cost and blocking rate in a malicious node environment.

Description

technical field [0001] The invention relates to a multi-domain optical network multicast routing method, in particular to a multi-domain optical network security multicast routing method based on distributed PCE. Background technique [0002] With the continuous expansion of the backbone optical network and the popularization of real-time applications such as video conferencing and distance education, the issue of multicast in multi-domain optical networks has attracted more and more attention. Different from the calculation of multicast trees in general networks, optical layer multicast is limited by optical devices such as wavelength converters and optical buffers, making optical layer multicast subject to various constraints. The core of the optical layer multicast problem is how to find a suitable route for a given multicast service and allocate corresponding wavelengths, so as to realize the normal transmission of data services. Therefore, it is very important to study...

Claims

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Application Information

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IPC IPC(8): H04L12/761H04L12/753H04L12/721H04L12/715H04Q11/00H04L45/16
CPCH04L45/16H04L45/48H04L45/14H04L45/04H04Q11/0062H04L45/62H04Q2011/0073
Inventor 吴启武周阳姜灵芝姜姗
Owner ENG UNIV OF THE CHINESE PEOPLES ARMED POLICE FORCE
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