The Design And Implementation Of The Control Plane On A Seamlessly Transformable Optical Swtiching Node

Recently, with the exponential increase of the Internet traffic andhighly complicated application scenarios, hybrid switching presents itssuperiority in practice. Since hybrid switching takes advantage of bothcircuit switching and packet switching, it becomes one of the switchingmethodology that can practically improve the performance of theswitching system and quality of service. Integration is one of the trend ofhybrid switching, which can maximize the resource usage, providedifferentiated service and make the network more flexible. But also,integration leads to highly complicated control mechanism.Seamlessly Transformable optical switching node is a highlyintegrated hybrid switching node. Through the dynamic allocation ofresource between different switching techniques achieved by a singlehybrid switching core, the system can transform between100%packetswitching and100%circuit switching seamlessly. Thus, design andimplementation of the control plane on a Seamlessly Transformable opticalswitching node makes a significant meaning on the design and research ofintegrated hybrid switching system.This thesis work is part of national863project “A Novel HighCapacity All-optical Switching Network Structure and Its Key Techniques,Protocols and Performance Evaluation Method”. The author of the thesisparticipates in the project and is involved to the design and implementationof the control plane on the Seamlessly Transformable optical switchingnode. Finally, integrated control and management software is developedand implemented in the system. The main contributions of this thesis include:1. From a control mechanism design perspective, the characteristicsof existing control mechanisms are analyzed and classified into threecategories: fixed, overspill, and traffic-mapping.2. Focused on the core of control mechanism, i.e. traffic mapping, weproposed a suitable traffic mapping strategy, including traffic demandestimation and circuit capacity calculation. The proposed traffic demandestimation method utilizes the existing information to estimate overalltraffic demand, and at the same time avoids the limitations of existingmethods. Simulation results show that the proposed method has a moreaccurate estimation results.3. We designed the control mechanism with the proposed trafficmapping strategy. The control plane with circuit allocation layer andpacket scheduling layer is designed. Related scheduling sequential logicand the design of control protocols are designed and detailed.4. Integrated control and management software is designed anddeveloped. Classification of management information is demonstrated.Related management protocols is designed. The software structure isdescribed as monitor mode, configure and query mode, and circuitallocation module. And finally, the integrated control and managementsoftware is achieved in the processing blade.