TAILIEUCHUNG - IP over WDM network

Outline: History of WDM networks. Current Internet: Multilayer protocol stack between IP and WDM layers. Future: IP directly over WDM Challenge: Virtual Topology Reconfiguration, Multilayer routing, One proposal: Optical Burst Switching technologies. | IP over WDM network Fang Yu 294 Class Presentation Outline History of WDM networks Current Internet: Multi-layer protocol stack between IP and WDM layers Future: IP directly over WDM Challenge Virtual Topology Reconfiguration Multi-layer routing One proposal: Optical Burst Switching technologies History In the late 70s First fiber based optical transmission system Before 1995 Mostly a single high-speed optical channel All multiplexing done in electrical domain(TDM) 50Mb/s to 10Gb/s data services After 1995 WDM allows simultaneously transmitting multiple high-speed channels on different frequencies (Up to 160 wavelengths today) 40G per l (OC768) Total link capacity = 160 l *40G = Tbps Current Typical Protocol Stacks IP ATM SONET WDM WDM Proprietary (20-400 Gb/s) OTS OTS OTS OTS OTS OTS (OTS: Optical Transport System) Transport Layer Model “Packet” “Packet” “Packet” “Packet” 1/0 DCS 1/0 DCS 1/0 DCS 1/0 DCS 4E 4E 4E 4E 3/1 DCS 3/1 DCS 3/1 DCS 3/1 DCS 3/3 DCS Layer (DACS III) DACS III

• Quản trị mạng
• IP over WDM network
• History of WDM networks
• Current Internet
• Virtual Topology Reconfiguration
• Multilayer routing