Supporting QOS in Mobile Networks
Final rept. 1 Oct 1999-30 Sep 2002
COLUMBIA UNIV NEW YORK DEPT OF ELECTRICAL ENGINEERING
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Research includes new stateful and stateless quality of service QOS architectures, services, and algorithms for the delivery of audio, video, and web data over mobile ad hoc networks MANETs. Major research contributions include the design, development, analysis, and evaluation of three new protocols that address the problem of MANET QOS at different points in the solution space. The INSIGNIA protocol represents a new stateful QOS architecture that requires per-flow soft-state reservations suitable for multimedia communications are set-up and maintained in the network using in-band signaling techniques. The SWAN Stateless Wireless Ad hoc Networks protocol represents a departure from per-flow reservations and is based on a stateless approach that cannot offer the same level of QOS performance as INSIGNIA but better scales to support very large numbers of nodes. The Hotspot Mitigation Protocol HMP interacts with the MANET routing protocols to redirect new routes away from hotspot and congestion-prone areas, therefore, avoiding any further build up of traffic intensity in hotspot regions. Each protocol developed by the project is evaluated using a combination of analysis, simulation and results from experimental wireless testbed deployment. The protocol software from the testbeds and ns simulator extensions is publicly available as open source from the web.
- Radio Communications