1. 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

2. 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

3. 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

4. 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

5. 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

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

7. 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

8. 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

9. 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

10. 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

11. 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