Design of Multi-Service Networks with Multicast Support Purdue MSI Proposal May 5, 1999 Design of Multi-Service Networks with Multicast Support Sonia Fahmy Department of Computer and Information Science Ohio State University Starting Fall ‘99: Assistant Professor Department of Computer Sciences Purdue University Design of Multi-Service Networks with Multicast Support

Overview I: Quality of service and traffic management research Purdue MSI Proposal May 5, 1999 Overview I: Quality of service and traffic management research II: Multicasting research Design of Multi-Service Networks with Multicast Support

I: Traffic Management on the Information Superhighway CAC 1 UPC Shaping 3 2 Scheduling 4 Selective 5 6 Frame Discard 7 Traffic Monitoring and feedback

Services and Traffic Management Scalable support of various services required for multimedia/real-time applications and bulk data to co-exist: Admission control ( policy control and pricing) Shaping, policing Scheduling Buffer management and drop policies Feedback control

Services and Traffic Management Research Differentiated services design and performance including mapping per-hop behaviors Selective buffer management policies design and performance (and layers) End system response to network state (including explicit feedback), e.g., ECN RSVP, admission and policy control and pricing

Related Issues Quality of service (QoS)-sensitive routing QoS in wireless networks Performance metrics for switches and routers QoS measurements

II: Multicasting = group member Multipoint communication = exchange of information among multiple senders and multiple receivers (multicast group) Popular applications requiring multipoint support include: conferencing, distance learning, searching, server and database synchronization

Multicast Support Traffic and management overhead should not be  number of participants Multicast requirements: Address formats and group addresses Dynamic group management (join/leave requests) Routing Forwarding Traffic management

Multicasting Research Inter-receiver fairness and inter-sender fairness Flow/congestion control providing certain levels of reliability (special problems arise for some networks, e.g., asymmetric links) Multicast support for multi-service networks (e.g., differentiated services) and explicit congestion notification

Related Issues QoS-sensitive multicast routing Heterogeneous receivers with different QoS requirements and re-negotiation Buffer requirements of traffic merging solutions Leaf 1 Root Merge Point Leaf 2

Purdue MSI Proposal May 5, 1999 Key Points Traffic management issues include router/end system reaction to network state, buffer management policies, QoS mapping, policy/pricing control Multicasting requires extensions to support multiple senders and receivers in fair QoS and traffic management, and group management Design of Multi-Service Networks with Multicast Support