1. Application-Level Multicast Approach Based on Mobile Agents Ching-Feng Li

2. Outline  Introduction  Current approaches  Application examples  Future works  References

3. Introduction  Inter-agents group communication and coordination  Construction and maintenance of multicast tree are required issues.

4. Three main areas in terms of overlay construction for data distribution in various application level multicast approaches  Mesh-First approaches  Tree-First approaches  Implicit approaches  NICE designed for large groups and low bandwidth, real- time application.  CAN which uses a virtual addressing approach.

5. Mesh-First Approaches Data Source Receiver 1Receiver 2Receiver 3Receiver 5Receiver 6Receiver 4 Mesh Network Internet Network

6. Mesh-First Approaches (cont.) Data Source Internet Network Receiver 1Receiver 2Receiver 3Receiver 5Receiver 6Receiver 4 - Example protocols: Narada, ALMI, Scattercast…etc. - Supporting of many-to-many multicast for real-time application such as audio/video conferencing applications with small-sized group.

7. Tree-First Approaches Data Source Internet Network Receiver 1Receiver 2Receiver 3Receiver 5New ReceiverReceiver 4 request to join group - Example protocols: Overcast, TAG, Peercast…etc. - This approach has the advantage of being scalable

8. Deploy agents and start to sent data after constructing the multicast tree Data Source Internet Network Receiver 1Receiver 2Receiver 3Receiver 5Receiver 6Receiver 4 MMA SMA MMA: Master Mobile Agent SMA: Slave Mobile Agent (clone from MMA and migrate to the other nodes along the multicast tree)

9. Data Source Receiver 2AReceiver 4AReceiver 4BReceiver 3Receiver 2BReceiver 1AReceiver 1B

10. Application examples: get local data and global data Host AHost EHost DHost CHost B Commander Console Host GHost F

11. Application examples: real-time streaming service Data Source Receiver 2AReceiver 4AReceiver 4BReceiver 3Receiver 2BReceiver 1AReceiver 1B

12. Future works  Implementation add on P2P-based mobile agent platform to accomplish the goal of inter-agent communication and coordination.

13. References  Korikang and Kimsh, "Survey on Application Level Multicast," CDS&N (Collaborative Distributed System and Network) laboratory.  C. Ragusa, A. Liotta, and G. Pavlou, "A scalable application-level multicast approach based on mobile agents," Networks, 2003. ICON2003. The 11th IEEE International Conference on 28 Sept.-1 Oct. 2003 Page(s):197 – 202