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：15
页码：3570
出版社：Journal of Theoretical and Applied
摘要：The next generation optical network is expected to handle the needs of an emerging applications in a cost effective way while complying with the QoS requirements. With the emergence of software-defined networking, the control plane can be lifted out from the networking devices and kept at a central location. This logical separation of layered functionalities with centralized control and management, enables the operators to offer the new range of services in an on demand and agile manner. With software defined networking, the needs of an emerging applications can be catered in real time. This paper analyzes the problem of optical light-path computation and proposes a novel mechanism for the next generation optical networks. As by the fact, any single light-path computation algorithm does not behave consistently under the varying traffic scenarios, as each algorithm/heuristic explores the search space in a unique way. So choosing the appropriate light-path computation algorithm/heuristic according to the traffic scenario is a viable approach. Considering the strict QoS requirements and global optimization aspects of the next generation applications such mechanism would be highly preferrable. This paper proposes a novel algorithm selection methodology for the next generation software defined optical network. The parent and child path computation element based optical networking was considered. The match fields used with the software defined networking were considered in designing the algorithm selection mechansism. A simulational study of QoS constrained path establishment in ONOS based software defined controller environment was performed. A java based NOX controller was configured with the parent and child path computation elements. Each of the child path computation elements were configured with different path computation algorithms. The ability of the appropriate selection of child path computation element was tested in ONOS simulation environment. This algorithm selection mechanism would be an amenable solution for the next generation software-defined optical network in which the intelligent and cognitive behaviors are inevitable
关键词：Next generation optical networks; Routing and wavelength assignment problem; Algorithm selection; Path computation element (PCE); software defined networking (SDN)
