Multicast traffic grooming method based on physical topology light-tree correction

A multicast service and physical topology technology, which is applied in the field of optical communication, can solve problems such as the decline of multicast service grooming ability and the waste of network resources, and achieve the effect of reducing the blocking rate and reducing the waste of wavelength resources

Active Publication Date: 2015-04-01
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of the waste of network resources caused by the selection of unreasonable logical paths, which leads to the decline of multicast service grooming ability, and proposes a multicast s

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  • Multicast traffic grooming method based on physical topology light-tree correction
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  • Multicast traffic grooming method based on physical topology light-tree correction

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[0030] The content and effects of the present invention will be described in further detail below with reference to the accompanying drawings.

[0031] Reference figure 1 , The implementation steps of the present invention are as follows:

[0032] Step 1. Initialize the physical topology map and the virtual topology map, and wait for the service request to arrive.

[0033] In this example, use as figure 2 The existing US backbone network USNET topology is shown as a physical topology, and the USNET topology includes 24 physical nodes and 42 physical links;

[0034] In order to make the multicast service use the existing logical path for grooming, the introduction of image 3 As shown in the virtual topology diagram, the virtual topology diagram contains a logical path layer and several wavelength layers. Considering the wavelength consistency of light, that is to say, a wavelength layer path can only use the same wavelength, so the wavelength layers are independent of each other. Wh...

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Abstract

The invention discloses a multicast traffic grooming method based on physical topology light-tree correction, which is mainly used for solving the problem that network resource waste is avoided due to unreasonable use of a logic path in the optical communication network. According to the technical scheme adopted by the invention, the multicast traffic grooming method based on physical topology light-tree correction comprises the following steps: I, establishing a multicast tree on a physical topology by utilizing an MPH algorithm; II, decomposing the multicast tree into a branch set; thirdly, taking hop count of branches on the physical topology as a reference value, and finding the shortest path on a virtual topology for each branch; judging whether the hop count of the shortest path is greater than the threshold hop count of the branches or not, if yes, finding the shortest path in a wavelength layer, and selecting the shortest path with the smallest hop counter as a usable shortest path, and otherwise, using the shortest path as the usable shortest path of the branches. The multicast traffic grooming method based on physical topology light-tree correction has the advantages of low business blocking rate and high network resource utilization rate, and is suitable for an optical communication network with relatively great multicast business needs and limited wavelength resources.

Description

Technical field [0001] The invention belongs to the field of optical communication technology, and further relates to a multicast service grooming MGPL method, which can be used for network transmission. Background technique [0002] With the rapid development of the Internet, people have put forward new requirements for the capacity and performance of communication systems. Wavelength division multiplexing WDM technology can provide huge transmission capacity to meet the Internet's demand for bandwidth. The current multicast traffic grooming methods in WDM optical networks mainly include single-hop and multi-hop grooming and virtual topology-based grooming. Both of these two grooming strategies have good reuse rates, but in the case of limited wavelength resources, more multicast services cannot pass through the network. [0003] Literature (Liyuan Hao, Weigang Hou, et al. Multicast Grooming Algorithm in Green IP over WDM Networks, 20102 nd International Conference on Technolog...

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Application Information

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IPC IPC(8): H04L12/18H04Q11/00
Inventor 杨帆徐展琦韩婷婷赵奥飞
Owner XIDIAN UNIV
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