1. Content and QoS Policies in Multi-domain Heterogeneous Mobile Systems Cristian Hesselman

2. Setting Broadcast applications –E.g., TV channels, e-learning Heterogeneous environment –Various wireless network techs, mobile hosts, administative authorities Related to AAA(ARCH), but no such perspective as yet I’m going to discuss the model I’m using

3. Content Model Channels –ID = source + content Diff channels –For course-grained classes of receivers Quality levels –Perceptual Streams –Encoders + packetizers

4. Infrastructure Model Administrative domains Technology domains Servers Clients App-level gateways

5. Policies To allow domain admins to manage their typically scarce wireless resources Channel policies Adaptation policies Focus on inter-domain roaming Example: client 5

6. Ongoing and Future Work Fine-tune model –E.g., explicitely include the notion of a channel end point Implement a ‘discovery’ protocol –Discover available channels and quality levels –For inter-domain roaming –Maybe based on existing protocols (e.g., SLP) –Incrementally add complexity –Ongoing

7. More Information C. Hesselman and H. Eertink, “Broadcasting Multimedia Channels in Future Mobile Systems”, Position Paper, Proc. 6 th International Conference on Protocols for Multimedia Systems (PROMS’01), Enschede, The Netherlands, October 2001 My web site: www.cs.utwente.nl/~hesselmn Email: hesselman@telin.nl