A Link Impairment-Aware Energy Efficient Routing Method for Differentiated Services in Elastic Optical Networks

Abstract

The invention relates to a link damage perception energy efficiency routing method for distinguishing services in an elastic optical network, and belongs to the technical field of optical fiber communications. The method designs a path weight formula based on load balancing for comprehensively considering the link frequency spectrum state and the transmission damage, so as to reduce the nonlineardamage among different channels. Based on the path weight formula, an edge-separated maximum weight path is selected for high-quality services; and an edge-separated shortest energy efficiency path isselected for low-quality services. During spectrum allocation, the spectrum is partitioned according to the ratio of the service rate, and a spectrum allocation mode combining first-time hit and tail-end hit is adopted to reduce the cross-phase modulation between the services of different transmission rates. At the same time, in order to reduce the probability that existing services are blocked since the current transmission service causes damage to the existing services in the network, an optical path reconfiguration mechanism of a physical damage blocking service is designed. The link damage perception energy efficiency routing method for distinguishing the services in the elastic optical network provided by the invention effectively improves the spectrum resource utilization rate and reduces the bandwidth blocking rate and the service transmission energy consumption.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to a link damage-aware energy-efficient routing method for differentiating services in an elastic optical network. Background technique [0002] The rapid growth of emerging network services such as high-definition video, interactive games, cloud computing, and big data has led to explosive growth in IP business volume, and the network business volume has shown a trend of doubling in two years. This development trend prompts network operators to expand network capacity to meet ever-increasing service demands. Traditional wavelength division multiplexing (Wavelength Division Multiplexing, WDM) technology uses frequency division multiplexing to carry multiple wavelength channels on one optical fiber, which greatly improves the network bandwidth capacity. However, with the diversification of business types and sizes, this fixed-grid wavelength allocation method lacks...

AI Technical Summary

Problems solved by technology

The physical damage caused by non-ideal devices and equipment during optical signal transmission continues to aggravate, and with the increase of the optical path transmission distance, the physical damage will continue to accumulate, which will seriously affect the transmission quality of the optical path. An established optical path may be damaged due to serious The signal damage caused by the optical signal cannot transmit the information carried by the optical signal

If the physical damage problem cannot be solved, the bit error rate of the optical signal will continue to increase, making the transmission quality of the optical signal drop sharply, thus failing to meet the service quality requirements of the network

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