Research On Damage Assessment Algorithm Of WSON Transmission Network

With the popularization of 5G technology,the traffic of WSON transmission network shows an increasing trend.With more and more business,researchers need to consider not only how to carry more business,but also how to evaluate the signal damage in WSON transmission network and how to meet the quality requirements of optical signal transmission.In this paper,a damage assessment algorithm(MSDA)based on multiplexed segment simulation model is proposed,which aims to improve the accuracy of optical signal-to-noise ratio calculation by accurately modeling each multiplexed segment in WSON transmission network.The simulation results show that compared with the traditional optical signal-to-noise ratio calculation formula,the OSNR error obtained by MSDA algorithm is smaller:the error of MSDA algorithm is within 0.4 dB,which is much smaller than the OSNR error(2 dB)of the traditional optical signal-to-noise ratio calculation formula.In order to further improve the accuracy of WSON transmission network damage assessment,this paper also considers the influence of nonlinear noise and EDFA gain flatness,and proposes a link feature based damage assessment algorithm(LDA).The basic idea of the algorithm is to extract the optical power of the input signal,the length of the service routing,the number of optical amplifiers,the number of cross-multiplexing segments,the channel number and the traffic state of adjacent channels from each service routing as features,and to extract the optical signal-to-noise ratio of the receiver of the service as the training target.The simulation results show that the accuracy of optical signal-to-noise ratio obtained by LDA algorithm can reach 0.7 dB.The reasonable deployment of relay stations can greatly reduce the construction cost of the network.This paper proposes a relay station election algorithm(LCRA)based on link stability and cost constraints.The algorithm considers the anti-fault ability of relay station and proposes the relay reuse rate index to evaluate the link stability.Through the simulation experiment,compared with the greedy relay selection algorithm,the LCRA algorithm can effectively reduce the relay blocking rate and relay cost,and has higher fault resistance and improves the link stability.