Method for configuring regenerators in wavelength division multiplexing optical network

A configuration method and regenerator technology are applied to the selection device, data exchange network, selection device and other directions of the multiplexing system, which can solve the problem of less calculation, and achieve the effect of less calculation and lower blocking rate.

Inactive Publication Date: 2012-06-27
BEIHANG UNIV
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Problems solved by technology

Compared with the ILP method, the above two heuristic algorithms are simpler and less computationally intensive, and can be applied to complex dynamic networks, but they can only determine the position of nodes that need to configure regenerators in the network and the average number of regenerators required by each node. number
[0005] Therefore, regarding the configuration of regenerators in WDM optical networks, the use of integer linear programming or heuristic methods has limitations, and there have been no reports on the combination of the two

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  • Method for configuring regenerators in wavelength division multiplexing optical network
  • Method for configuring regenerators in wavelength division multiplexing optical network
  • Method for configuring regenerators in wavelength division multiplexing optical network

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[0054] In order to better verify the performance of the method proposed by the present invention, it is applied to an NSF network composed of 16 nodes and 25 links. The length of each link in the network ranges from 600km to 3000km, and each link is composed of a pair of optical fibers, so any two directly connected nodes can realize two-way communication. The number of wavelengths supported by each fiber is 4. At the same time, communication between any two nodes is occupied and only one wavelength channel is occupied. The routing algorithm uses the typical shortest path algorithm-Dijkstra algorithm, and the path length is used as the cost criterion for routing. Using Dijkstra algorithm, the shortest path between any two nodes in the network can be obtained. When the shortest path is not unique, select randomly from all the shortest paths of equal length. Assuming that the physical layer transmits a 40Gb / s optical differential quadrature phase modulation return-to-zero code...

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Abstract

The invention discloses a method for configuring regenerators in a wavelength division multiplexing (WDM) optical network. In the method, heuristic linear programming and integer linear programming are respectively used for determining the route node positions of regenerators configured in a network and the quantity of regenerators configured on each node. In a known network topology, when the sum of configurable regenerators is limited, the regenerators are reasonably configured by adopting the method, so that the limitation of optical fiber physical transmission impairments is lowered, and the rate of network congestion caused by the reason that a target node can not correctly recover the original information is reduced. The method is not related to network service types, and by adopting the method, the minimum conservatism that the network is not related to network can be obtained. Besides, as the method is not related to network exchange type, the configuration result of the regenerators in the WDM network, which is obtained by adopting the method, can be applied to not only a wavelength routing network but also an optical packet switching network.

Description

Technical field [0001] Under the premise that the total number of configurable regenerators is limited in the known wavelength division multiplexing optical network topology, the cumulative transmission length of the link is used as the threshold, based on heuristics and integer linear programming, to determine the location of the routing node in the network where the regenerator needs to be configured The method for configuring the number of regenerators for each node belongs to the field of network technology, and particularly relates to the technical field of regenerator configuration algorithms that can realize a wavelength division multiplexed optical network with certain performance guarantees that are not related to services. Background technique [0002] In the high-speed, long-distance wavelength division multiplexing (WDM) optical fiber communication system, due to the influence of factors such as fiber dispersion and nonlinearity, system noise and device aging, after lo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04Q11/00H04B10/12H04L45/02
Inventor 闫娟娟武玥郑铮
Owner BEIHANG UNIV
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