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Using Node Mobility to Enhance Greedy Forwarding in Geographic Routing for Mobile Ad Hoc Networks

Using Node Mobility to Enhance Greedy Forwarding in Geographic Routing for Mobile Ad Hoc Networks Investigators: Sol M. Shatz, Department of Computer Science, Primary Grant Support: U. S. Army Research Office. Problem Statement and Motivation.

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Using Node Mobility to Enhance Greedy Forwarding in Geographic Routing for Mobile Ad Hoc Networks

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  1. Using Node Mobility to Enhance Greedy Forwarding in Geographic Routing for Mobile Ad Hoc Networks Investigators: Sol M. Shatz, Department of Computer Science, Primary Grant Support: U. S. Army Research Office Problem Statement and Motivation • Node mobility is normally considered a hazard for geographic routing, causing a degradation of performance or even persistent routing failures. • This research seeks to exploit mobility to enhance greedy forwarding in geographic routing, especially for those applications with loose delay constraints. Key Achievements and Future Goals Technical Approach • Two ways to move a packet: (1) Transmission Hops (TH), and (2) Physical Motion (PM). • Trade-offs: TH produces short delay, however it incurs significant resource consumption and is vulnerable to local-maximum problems. Use both TH and PM to optimize packet routing. • Motion Potential: Combines node mobility attributes with node position information as a metric to be used in selecting a next-hop node. • New approach called Mobility-based Adaptive Greedy Forwarding (MAGF) • Our method can enhance routing performance in terms of route hop-count (energy) and packet delivery rate, especially under the scenarios of low network density and high node mobility. • Uses low computation overhead at each step of forwarding, maintaining the pure localized decision making of conventional geographic routing. • Future research would focus on: (1) energy-delay trade-off study; (2) long-term mobility pattern predication accuracy.

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