Research Of Traffic Grooming And Routing Strategy In Elastic Optical Network

Traditional WDM network has grown dramatically in recently years, but it also brings some other technology issues. One of the problems is that wavelength level routing restricts the resources utilization rate. To solve this problem, SLICE (Spectrum-Sliced "Elastic Optical Path" Network) has been proposed and being one of popular issues in optical network.Meanwhile, there are also some problems need to be solved urgently in SLICE, such as bandwidth variable optical cross connection, adaptive traffic grooming among different flexible speculums, routing and spectrum distribution, etc. This paper will research routing algorithm in flexible network engaging traffic grooming and QoS (Quality of Service) technologies. The paper structure is as below:Firstly, paper summarizes traditional wavelength level switch optical network’s development status and tendency, and then introduces SLICE (Spectrum-Sliced "Elastic Optical Path" Network) and key technologies and difficulties in SLICE.Secondly, paper discusses three research key points in optical network:routing, traffic grooming and QoS. All the three points were studied in both traditional WDM network and flexible optical network.Thirdly, a novel CoS-enabled path selection algorithm with traffic grooming function has proposed in this paper. This algorithm resolved the problem of Class of Service (CoS) and traffic grooming, a CoS-enabled path selection algorithm with traffic grooming function (CPSATG) is proposed in. this paper. Simulations are conducted to compare the proposed scheme with methods which have not considered CoS and traffic redundancy. Results show that CPSATG has a much better blocking probability performance and effective resource utilization than the existing methods with almost the same cost of network nodes.