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Summary Of Previous Discussions and a Proposal For A System Architecture

Summary Of Previous Discussions and a Proposal For A System Architecture. Saleh Al-Harthi. OUTLINE. Project Web site: Temporarily at: http://www-cwc.ucsd.edu/~saleh/adasys/ Summary of Previous Discussions: Presentations Discussion A Proposal For A System Architecture:

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Summary Of Previous Discussions and a Proposal For A System Architecture

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  1. Summary Of Previous Discussions and a Proposal ForA System Architecture Saleh Al-Harthi

  2. OUTLINE • Project Web site: • Temporarily at: http://www-cwc.ucsd.edu/~saleh/adasys/ • Summary of Previous Discussions: • Presentations • Discussion • A Proposal For A System Architecture: • What is Adaptivity? • System Components • How to Begin?

  3. Summary Of Previous Discussions: Presentations • “Adaptive Applications for Wireless Information Technology” • Debashis Panigrahi • “End-to-End Differentiation of Congestion and Wireless Losses” • Song Cen • “Scheduling Over Wireless Networks” • Kameswari Chebrolu • “Resource Allocations in Wireless Networks” • Arvind Santhanam Applications Physical (Layer) Access Networks Scheduling, Ad Hoc Networks

  4. Summary Of Discussion • Issues: • Applications • Physical (Layer) • Scheduling • Network Type • Test-bed Network Applications Physical (Layer) Access Networks Scheduling, Ad Hoc Networks

  5. Summary Of Discussion • Applications: • Categories: Mainly streaming media (video) and Web browsing. • Develop application “abstractions” and Models • Explore adaptivity in context of existing standards or 4G networks?: Both.

  6. Summary Of Discussion • Physical (Layer) • Models for the Wireless channel • Methods to combat fading • Diversity, coding,…etc.

  7. Summary Of Discussion • Scheduling: What is The Optimal Scheduling? • First, model (possibly mathematically) the traffic categories (or applications) then find the optimal solution. • Want QoS guarantees, High Utilization, and Cost Effective Solution.

  8. Summary Of Discussion • Network Type: Cellular or Ad Hoc? • Adaptivity in “access” to both systems? • Yes, mobile unit could have two (or more) “modes” • Can “Cullular” & “Ad Hoc” be connected? (Next)

  9. Summary Of Discussion • Dual Approach?: Cellular & Ad Hoc • Explore the use of Ad Hoc networks algorithms for basestations?: e.g. Routing • Two separate Systems: Integration of “cellular” and “Ad Hoc”, e.g. “Ad Hoc Relay Stations” (ARS) proposed by H. Wu et. al. [IEEE Journal on Selected Areas in Communications, vol.19, (no.10), IEEE, Oct. 2001. p.2105-15.] • Why ARS (Next)

  10. Summary Of Discussion • Benefits of ARS: Load balancing, Increased Capacity, and Provide Service for Shadow Areas.

  11. Summary Of Discussion • Benefits of ARS: Load balancing, Increased Capacity, and Provide Service for Shadow Areas

  12. Summary Of Discussion • Test-bed Network • In the near future, could use momentum to start with a few “programmable” mobile nodes • Mutual interest between academia and industry could eventually lead to “Adaptive Systems lab” NOT a Replacement For Simulation

  13. A System Architecture • Adaptive System?

  14. A System Architecture • What is Adaptivity?: (Mobile Unit) • Static terminalcharacteristics: Display size, processing capabilities • Dynamic terminal characteristics: Battery reserves, user preferences • Location: Available infrastructure, points of interest to the user • Varying cost of transmission: Access Networks • Applications requirements: e.g. Video “player” vs. “Editor” What about the “System”?

  15. A System Architecture • System Components: “Modularity” is the key: • Dividing a complex problem to sub-problems • Long-term development and survivability • Reconfigurability by software downloads: e.g., the “TRUST” Project Basic System components Wireless Channel

  16. A System Architecture • System Components: The Scheduler Wireless Channel

  17. A System Architecture • System Components: The App. Module Wireless Channel

  18. A System Architecture • System Components: The App. Module- A possible consideration: Wireless Channel

  19. A System Architecture • Other componenets and issues, e.g., Power Control (There may be others?) Wireless Channel Other Possible “explicit” System components

  20. A System Architecture • How to begin? • A slim version first: e.g., • Web-browsing only • Design one instance of the “scheduler” and simulate performance with various applications suite of algorithms • Extend and modify existing research • Hold technical sessions (may be Graduate students)

  21. The End. • Thank you.

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