Elastic light network multi-link fault probability protection method with minimum fault risk loss

Abstract

The present invention relates to an elastic light network multi-link fault probability protection method with minimum fault risk loss, belonging to the optical fiber communication technology field. Through adoption of the asymmetrical business flow minimum fault risk loss probability protection method, the elastic light network multi-link fault probability protection method with the minimum fault risk loss selects a shunt path with the minimum fault risk loss to take as the transmission path of the business flow request to provide efficient probability protection for the business and reduce the network blocking rate, and selects a frequency spectrum block with the maximum frequency spectrum contact ratio through the frequency spectrum distribution method based on the frequency spectrum contact ratio for performing frequency spectrum distribution so as to reduce the frequency spectrum fragments generated by the network. The elastic light network multi-link fault probability protection method with the minimum fault risk loss can effectively reduce the bandwidth blocking rate in the network, realize the balance of the network blocking rate and the reliability, reduce the fault risk loss of the network and improve the frequency spectrum resource utilization rate of the network.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to a multi-link failure probability protection method of an elastic optical network with minimum failure risk loss. Background technique [0002] In recent years, with the development of multimedia services, a large number of applications such as interactive network TV, video on demand, cloud computing and grid computing, and high-definition real-time video communication have emerged. The network traffic has exploded and the demand for network bandwidth has increased sharply. The traditional optical transmission technology needs to perform optical-electrical-optical conversion during the transmission process. Due to the limitation of the bandwidth bottleneck in the electrical domain, and the physical loss becomes more and more serious with the increase of the transmission rate, it is difficult to meet the needs of future optical networks. bandwidth requirements. A...

AI Technical Summary

Problems solved by technology

This survivability routing spectrum allocation strategy is more suitable for a single-link failure environment, but not for a multi-link failure network environment, because to achieve 100% multi-fault protection, a large amount of protection resources need to be consumed, resulting in a high network congestion rate ; On the other hand, it needs to consume a large number of optical devices, which is expensive

At the same time, with the dynamic establishment and release of the requested connection, the spectrum allocation method of the first hit may generate a large number of spectrum fragments, making the spectrum resources in the network discretized and not enough to transmit subsequent services, resulting in an excessively high network blocking rate

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