期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2017
卷号：95
期号：11
出版社：Journal of Theoretical and Applied
摘要：The network operators are striving for the optimization of transmission resources while achieving network performance and efficiency. The current optical networking is rolling out towards the next generation intelligent optical network to offer high capacity and better quality according to the attribution of the service. One of core problems in optical network is path computation which involves finding the route between source to destination with appropriate wavelength. The constrained optical path computation involves finding the route with appropriate wavelength while optimizing one or more criteria (ex: less congestion). At present scenario, the centralized PCE with GMPLS control plane could control the optical network with traffic engineering. This approach may be incapable or costlier for the next generation voluminous and dynamic application needs with range of QoS gurantees. The PCE has to rely on a certain routing protocol along with some path cost measures, may not explore the required optimal solutions space, and end up with the best effort path most of the time. Moreover the traffic engineering can potentially add additional cost while maintaining the quality of the path. This article intends a path computation algorithm selection framework amenable for the next generation software defined optical network to solve the problem of QoS constrained path computation. The framework exploits the right proportion of enabling technologies to realize the constrained optical flows in a cost effective and optimal manner. The simulation study was performed to analyze the characteristics of the PCE based algorithm selection model in the SDN based optical network.
关键词：Bit Error Rate (BER); Path Computation Element (PCE); Generalized Multi Protocol Label Switching (GMPLS); Quality of Service (QoS); Software Defined Optical Network (SDON).
