N 国家重点实验室 1.background and motivation A number of trends are driving network providers and users to reevaluate traditional approaches to network architecture - Demand is increasing ·Cloud computing 。 Big data 。Mobile traffic The Internet of Things(loT) Supply is increasing Transmission rate is increasing,e.g.,401*10G/--> 401*100G/入 Switching capacity/throughput is lifting sharply,Huawei company could perform switching as much as 256 to 819.2 Tbps 2020/5/14 Dr.Zhangi XU,National Key Lab on ISN,Xidian University 22020/5/14 Dr. Zhanqi XU, National Key Lab on ISN, Xidian University 2 1. background and motivation  A number of trends are driving network providers and users to reevaluate traditional approaches to network architecture – Demand is increasing • Cloud computing • Big data • Mobile traffic • The Internet of Things (IoT) – Supply is increasing • Transmission rate is increasing, e.g., 40λ*10G/ λ --> 40λ*100G/ λ • Switching capacity/ throughput is lifting sharply, Huawei company could perform switching as much as 256 to 819.2 Tbps