A Network Coding-Based Multipath Optical Transmission Method for Secret Traffic
With the development of Internet application,more and more secret traffics with secret requirements face security challenge in terms of being attacked or eavesdropped,when they transmitted in space division multiplexing elastic optical network(SDM-EON).To ensure the transmission security of secret traffic and reduce the waste of spectrum resourc-es,a network coding-based multipath optical transmission for security traffic(NC-MOTS)is proposed for SDM-EON.In the routing stage,we design a path cost function which can evaluate the probability of link eavesdropping,the number of path hops and the idle spectrum resources on the path.So,the NC-MOTS selects two paths or three paths transmission strat-egy with the minimal route cost.In fiber core selection,we design an evaluation value to evaluate the path's spectrum frag-mentation and load imbalance.Then,we select the fiber core with low spectrum fragmentation and load balancing which meets the bandwidth requirements of secret traffic.In the stage of spectrum allocation,a spectrum fragmentation and load-sensing spectrum allocation method is designed to meet the network coding conditions.Through the sliding spectrum win-dow,the spectrum block that can be network encoded and causes the low spectrum fragmentation and makes load balance between fiber cores is found.Compared with other routing spectrum allocation algorithms using network coding,the simula-tion results show that the proposed NC-MOTS can effectively reduce the secret traffic's blocking probability and improve spectrum resource utilization when the network load is greater than 200 Erlang.
SDM-EONnetwork codingmultipatheavesdroppingsecret trafficblocking probability
万方数据
维普
