1 Multihoming Media Streaming 24th IEEE IPCCC 7-9 April 2005 Page(s):499 – 504 Reporter ：陳韋志

2 Outline Introduction Experimental setup Streaming and multihoming Experiments and evaluation Conclusion

3 Introduction (1/2) The goodness of a network path depends on the available bandwidth, packet loss rate, packet delay, and path overlap. Multihoming provides backup links in case of link failure and the ability to reach destinations using alternative paths.

4 Introduction (2/2) We design a multipath Multihoming Media Streaming system (MMS) to show how a streaming application can effectively use the path diversity due to multihoming by Splitting a streaming session over the alternative paths Migrating a connection from one path to another to avoid congestion.

5 Experimental setup Chose two largest providers in San Francisco Bay area, namely Comcast for cable service, and SBC-Yahoo for DSL device. We refer to the DSL provider as and the cable provide as in this paper.

6 Streaming and multihoming (1/5) A new metric Multiple Source Path Overlap (MSPO ) source1 ISP1 ISP2 receiver source2

7 Streaming and multihoming (2/5) source1 source2 ISP1 Receiver source3 source4 ISP2 source5

8 Streaming and multihoming (3/5) The MSPO determines the supplier assignment on the each ISP to reduce the overall overlap. Using ISP assignment, we obtain the topology tree for a streaming session, where the receiver is the root and the suppliers are the leaves of the tree.

9 Streaming and multihoming (4/5) Our multihoming streaming system MMS takes advantages in two different ways: It splits a streaming session from one physical link into multiple physical links to reduce the overlap among the supplier to a receiver. It migrates part of a streaming session from one physical link to another during congestion.

10 Streaming and multihoming (5/5)

11 Experiments and evaluation (1/5) We compare the performance of media streaming with or without multihoming. The multihoming uses connection split to take advantage of available physical links.

12 Experiments and evaluation (2/5)

13 Experiments and evaluation (3/5) Figure shows that no packet missed when multihoming is used whereas many packets missed without multihoming.

14 Experiments and evaluation (4/5) The streaming session is split over both links and. Three suppliers are on and one supplier is on. When one connection on experiences congestion( high packet loss ), the connection is moved to.

15 Experiments and evaluation (5/5)

16 Conclusion Multihoming reduces path overlap, and the performance of a streaming application can improve session quality by 30% or more by two ways as we say before. Advances in system support, e.g., in terms of management, security, and usability, are necessary for residential multihoming to become useful and ubiquitous.