Speaker: Bin Wang, Electrical Engineering, Ohio State University
In this talk, we will describe extension to core based tree multicast routing protocols, for example, core-based tree routing protocol (CBT) and simple multicast protocol (SM), to maintain a multicast tree with user-specified QoS properties. Specifically, we describes enhancements to the multicast member join/leave and state update/refresh procedures to facilitate the deployment of additive (e.g., end-to-end delay bound), multiplicative (e.g., packet loss ratio along a path), and concave (e.g., minimum bandwidth available) QoS.
Eligibility tests are devised to verify whether or not a new member can join a multicast tree at adequate QoS, while not violating the QoS received by on-tree members. Management of router state is based on a simple state update and refresh procedure that can be readily integrated with the tree maintenance mechanism that exists in bi-directional core-based multicast routing protocols (e.g., the use of echo-request and echo-reply messages in CBT for tree maintenance).
We developed a Java-based objected-oriented network simulator called NetSim^Q to study the proposed QoS mechanism. The proposed QoS routing extension is shown to be effective and incur reasonable amount of control message overhead.
Short Bio: See the home page under Bin Wang
Rouskas, Computer Science, NCSU
Colloquia Home Page.