University of Kansas Joseph B. Evans, Victor S. Frost, Gary J. Minden Information & Telecommunication Technology Center University of Kansas Gigabit Networking Workshop 29 March 1998 Service Independent Access Points (SIAP) to Optical Wide Area Networks

University of Kansas Motivation Objective develop extremely high speed (100+ Gbps) switching support multiprotocol switching –SONET frames, ATM cells, frame relay, IP datagrams support wide area networks Why? develop technologies for future extremely high speed networks provide flexible high speed transport for large traffic volumes of different types and with varying requirements

University of Kansas Some Assumptions Small address space optical correlation expensive Large frames for TDM systems, matching decision times relatively long for WDM systems, tuning times relatively long Significant portions of datapath must be optical electronics too slow for datapath portions of control path may be electronic

University of Kansas Overview of Architecture

University of Kansas SIAP Protocols

University of Kansas Protocol Engine Used to convert between existing networking services and the O-WAN transmission protocol Introduces direct support for multiple higher layer protocols at the bit transport layer bit sequences within the optical framing structure identify the particular service protocol engine (switch, router, etc.) to use Simplifies implementation and supports high speeds direct demultiplexing to upper layer protocol engines avoids unnecessary processing and queuing delays

University of Kansas Optical Processor Used to encode transmission frames, and select and decode received frames utilizing high capacity (up to 10 Gbps) optical processing Provides the mechanism by which a flow is encapsulated and its associated framing fields are processed Supports datapath, control, and management functions such as framing, address/protocol identification, scrambling and descrambling, and error control

University of Kansas Link Quality Estimator Used to estimate signal quality on each of many wavelengths (8-16 wavelengths) for OA&M functions minimize complexity and cost of management overhead for support of multi-wavelength systems

University of Kansas Other Components WDM Add/Drop Multiplexers - Used to select a single wavelength for further processing from a received WDM signal or inject a new wavelength into a transmitted signal Cienna 16 system Protocol-specific engines - Equipment that transmits and receives SONET, ATM, IP or other networking service protocols Alcatel SONET ADMs FORE/Nortel ATM switches Cisco series routers