Hylabs Hybrid Optical Switched Network Optimization Design

To overcome the shortcoming of wavelength switching and packet switching, hybrid optical switching is proposed to combine them. To obtain the advantages of both switching paradigms, i.e., Optical Circuit Switching (OCS) and Optical Burst/Packet Switching (OBS/OPS). We propose Hybrid Lightpath and Burst Switching (HyLABS) to support all kinds of services flexibly and efficiently.In Chapter 2, virtual topology design, routing design and capacity design for HyLABS is studied. Heuristic Logical topology Design Algorithm (HLDA) is used to construct the virtual topology of OCS part of HyLABS. To optimize the traffic in OBS part of HyLABS, Optimized Shortest Path Algorithm (OSPA) and Optimized Load Balance Algorithm (OLBA) are proposed. Simulation results show OLBA has lower packet loss probability than OSPA. Finally, we introduce uncapacitated design of HyLABS and the corresponding optimization models are given.Unified control plane is critical to the success of HyLABS. A GMPLS unified control plane for HyLABS is given in Chapter 3. The related functional blocks for edge nodes and core nodes are given in details. Through extending GMPLS protocol, HyLABS could integrate different signaling, switching, and reservation schemes seamlessly. The main features of HyLABS, along with its benefits as well as design and implementation challenges, are also described.In Chapter 4, two hybrid switch fabrics are given to support HyLABS, i.e., parallel hybrid switch fabric and cascade hybrid switch fabric. In our fabrics, high speed switching fabric and low speed one are connected efficiently, which could reduce the size of high speed switching fabric with satisfy probability of acceptance. The simulation platform used in this thesis is briefly introduction in Chapter 5. The last chapter concludes this thesis.