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

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...

AI Technical Summary

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 service grooming method based on physical topology optical tree modification to minimize Waste network resources, realize effective use of network resources in optical communication networks, and improve the performance of multicast service grooming

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