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Failure probability and load balancing tradeoff method and system for spectrum flexible optical network
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A failure probability and load balancing technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as unbalanced optical fiber link spectrum resources and no available spectrum resources for optical fiber links
Active Publication Date: 2020-11-17
SUZHOU UNIV
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On the other hand, in the spectrum flexible optical network, in order to avoid some fiber links due to excessive consumption of spectrum resources, the fiber links have no available spectrum resources, which will cause the unbalanced characteristics of the spectrum resources occupied by the fiber links
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Embodiment 1
[0072] Such as figure 1 As shown, the failure probability and load balancing compromise method of a spectrum flexible optical network described in a preferred embodiment of the present invention is characterized in that it includes:
[0073] In the spectrum flexible optical network G(V,E,F), where V={v 1 , v 2 , v 3 ,...,v |V|} represents a group of optical switching nodes, E={e 1 , e 2 , e 3 ,...,e |E|} represents a group of optical fiber links, F={f 1 , f 2 , f 3 ,..., f |F|} is the set of available spectral slots. |V|, |E|, |F| represent the number of optical switching nodes, the number of fiber links, and the number of frequency gaps in the network, respectively; the fiber link from node k to node l will be represented by (k,l), where k,l∈V. A set of connection request sets CR is known. For each connection request, CR(s,d,FS)∈CR, s and d represent the source node and destination node of the connection request respectively, and FS represents the bandwidth in te...
Embodiment 2
[0092] Such as figure 2 As shown, the failure probability and load balancing compromise system of the spectrum flexible optical network in this embodiment includes:
[0093] Network initialization module: set the topology information of the spectrum flexible optical network, the network connection status, the number of network optical switching nodes, the number of optical fiber links, the number of spectrum slots of each fiber link, and the bandwidth of each spectrum slot.
[0094] Connection request generation module: Generate connection requests according to the uniform distribution of source nodes and destination nodes, and set the number of connection requests, source nodes and destination nodes of different connection requests, bandwidth requirements and other information.
[0095] Working path calculation module: According to the source node and destination node of the connection request, the K shortest path algorithm is used to calculate multiple candidate working pat...
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Abstract
The invention relates to a fault probability and load balancing compromise method and system for a frequency spectrum flexible optical network and is designed to realize the lower fault probability of connection requests in the transmission of the frequency spectrum flexible optical network and avoid load balance of an optical fiber link. The fault probability and load balancing compromise method comprises the following steps: firstly, setting the optical fiber link fault probability of the frequency spectrum flexible optical network and generating a group of connection requests; secondly, calculating K paths for each of the connection requests, calculating the fault probability of each of the working paths and finding frequency spectrum resources satisfying the corresponding connection request on each of the working paths; finally, setting the fault probability as well as optical fiber link load regulation parameters, calculating the fault probability of the K paths and an optical fiber link load compromise value, selecting the path with the minimal compromise value as the working path of the corresponding connection request, distributing the frequency spectrum resources of the connection request in the selected path and establishing the connection request. According to the fault probability and load balancing compromise method and system provided by the invention, the frequency spectrum resources of the frequency spectrum flexible optical network are in optimal states, so that the frequency spectrum efficiency of the frequency spectrum flexible optical network is improved.
Description
technical field [0001] The invention relates to a compromise method and system for failure probability and load balance of spectrum flexible optical network. Background technique [0002] At present, under the application business requirements of the Internet, data centers, cloud computing, big data, and Internet of Things, more than 95% of the global information volume is transmitted through optical communication networks. It is precisely because of the huge demand for bandwidth of the business that the bandwidth demand of the optical network will show an exponential growth trend, forming an ever-increasing scale of the optical communication network, which brings complexity to the optical network, resulting in low efficiency of optical network resources and the probability of optical network failures increase. Traditional optical networks use wavelength division multiplexing to form allocated bandwidth resources, and the channel interval, transmission rate, and service gra...
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