An elastic optical network spectrum allocation method for minimizing the total reduction of network idle resources
A technology of elastic optical network and idle resources, which is applied in the field of spectrum allocation of elastic optical network, can solve the problems of blocked connection requests, reduce the blocking probability of connection requests, reduce the fragmentation degree of spectrum resources, etc., and achieve the effect of reducing network blocking rate
Active Publication Date: 2019-06-07
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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[0005] Aiming at the technical problem that the existing spectrum allocation method cannot meet the spectrum restriction conditions and easily cause the connection request to be blocked, the present invention proposes an elastic optical network spectrum allocation method that minimizes the total reduction of network idle resources, and provides a measure of all related An indicator of the reduction of idle resources on the path, which can reduce the fragmentation of spectrum resources, thereby reducing the blocking probability of connection requests
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[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0028] Such as figure 1 As shown, a flow chart of a flexible optical network spectrum allocation method that minimizes the total reduction of network idle resources, the specific steps are as follows:
[0029] Step 1: When the connection request r from the source node s to the destination node d arrives, obtain the number S of frequency slots requested by the connection request r r , load the path P from the source node s to the destination node d sd collect...
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The invention provides an elastic optical network spectrum allocation method for minimizing the total reduction amount of idle resources of a network, which comprises the following steps of: when a connection request from a source node to a destination node arrives, loading a path set related to a path from the source node to the destination node; Judging whether an available frequency block meeting the requirement of the connection request exists on the path from the source node to the destination node or not, if not, blocking the connection request, and if not, finding out all available frequency blocks on the path from the source node to the destination node; For each available frequency block, calculating a total reduction amount of idle resources in the network when the available frequency block is used, and selecting the available frequency block that minimizes the total reduction amount of idle resources to be allocated to the connection request. The invention aims at enabling the amount of idle resources remained in the whole network to be maximum after each time of spectrum allocation, thereby increasing the probability of obtaining available spectrum resources by subsequent connection requests, and achieving the effect of reducing the network blocking rate.
Description
technical field [0001] The invention belongs to the technical field of optical networks, and in particular relates to an elastic optical network frequency spectrum allocation method which minimizes the total reduction of idle network resources. Background technique [0002] With the rapid development of technologies such as cloud computing and mobile Internet, people have higher and higher requirements for network bandwidth, and the requirements for bandwidth are becoming more and more diverse. In the traditional optical network, the wavelength division multiplexing (Wavelength Division Multiplexing, WDM) method is used to transmit signals, and the transmission channels that can be provided are wavelengths with fixed spectral widths. diversity requirements. In order to solve this problem, Jinno et al. proposed the concept of Elastic Optical Network (EON) in 2009. First, optical Orthogonal Frequency Division Multiplexing (Optical Orthogonal Frequency Division Multiplexing, ...
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IPC IPC(8): H04Q11/00
Inventor 袁俊岭张启坤任忠保许志敏
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY