1	A Proposal for an Ad-Hoc Network QoS Gateway
2	Agenda Introduction and Motivation Problem Definition & Major Challenges Design Fundamentals Proposed Model Architecture Proposed Model Performance and Behavioral Characteristics Summery of Simulation Results and Conclusion Publications Resulted from this Research
3	Motivation The increasing availability of WLAN. The enormous growth of cellular networks. The development of Community Access Networks. The growing popularity of P2P wireless applications. The increasing interest in ad-hoc and MESH networks. All of the above market growth fuel the need to develop a QoS access gateways that can provide better than BE services to roaming nodes with minimum configuration.
4	QoS Approaches from Layered Perspective MAC QoS DCF, EDCF, WLAN implementations QoS-aware routing AODV, DSR, OLSR, Inter-layer QoS models dQoS, FQMM, INSIGNIA, SWAN QoS-aware Applications Middleware, VoIP codecs Other approaches FPRP, RSVP-MP CROSS-DOMAIN view: IntServ over DiffServ
5	Challenges to QoS Access Gateway The merging of different QoS model employed on each side of the gateway. The lack of a policing authority in the ad-hoc domain leads to the need for extra policing on the gateway that may not be scalable. The difficulty in maintaining accounting and billing records for the mobile nodes due to the lack of a central authority. The difficulty in obtaining effective service provisioning leaves the gateway with a hard optimization decisions. Designing scalable architecture.
6	Proposed Model Cases
7	Design Fundamentals The Reuse of Common Gateway Design Principals Common Service Subset, Asymmetric Design Access Network as a Private Friendly DiffServ Domain E2E ARSVP reservation Reactive Aggregated Resource Allocation Services are requested only when needed The Use of Limited Policing Compromise between scalability and policing Service Ladder Policy (Optional)
8	Gateway Architecture in Upstream Scenario
9	Proposed Model (Disabled) in DNST – Bandwidth View
10	Proposed Model (Enabled) in DNST – Bandwidth View
11	Why We Improve Both RT and BE-bandwidth
12	Proposed Model in DNST – Delay View
13	Conclusion on Proposed Model Behavior Enabling proposed model increases the amount of bandwidth assigned to RT-flows. In association, the BE-bandwidth experience limited change. Enabling proposed model decreases the average RT-delays by a large margin, while the average BE-delays experience limited change. Enabling proposed model results in smoother bandwidth and delay charts which facilitates smaller jitter.
14	Comments On Proposed Model Performance The overall gain when using the proposed model depends highly on the various components used in the model. The model has been tested over DiffServ, INSIGNIA, SWAN and ESWAN. The performance of the ad-hoc QoS implementation has high impact on the overall performance due to the limited resources available on ad-hoc domains. The use of reactive resource allocation avoids the trouble of provisioning services, but adds a little latency to service initiation. The proposed model shows significant enhancement to supported RT traffic BW & delay associated with limited impact on BE traffic when employing SWAN.
15	Publications Resulted from this Research Yasser L. Morgan and Thomas Kunz, “A Proposal for an Ad-hoc Network QoS Gateway”, to appear in the Proceedings of the IEEE International Conference on Wireless and Mobile Computing, Networking and Communications WiMob-05, Montreal Canada, August 2005. Yasser L. Morgan and Thomas Kunz, “A Design Framework for Wireless MANET QoS Gateway”, to appear in the Proceedings of the 6th ACIS International Conference on Software Engineering, Artificial Intelligence, Networking, and Parallel/Distributed Computing, pp. 31-37, Towson USA, May 2005. Yasser L. Morgan and Thomas Kunz, “Enhancing SWAN QoS Model By Adopting Destination-Based Regulation (ESWAN)”, in the Proceedings of the 2nd WiOpt-04 Conference for Modeling and Optimization in Mobile Ad-hoc and Wireless Networks, pp. 112-121, Cambridge UK, March 2004. Yasser L. Morgan and Thomas Kunz, "PYLON: An architectural framework for ad-hoc QoS interconnectivity with access domains", in the Proceedings of the 36th International Conference on System Sciences, Hawaii USA, January 2003. Yasser L. Morgan and Thomas Kunz, “An Architectural Framework for MANET QoS Interaction with Access Domains”, Proceedings of the 1st International Conference on Ad-Hoc and Wireless Networks, pp 33-47, Toronto Ontario-Canada, September 2002.
16	Discussion & Remarks