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Youngtae Noh, Paul Wang†, Uichin Lee‡, Mario Gerla UCLA , CS † JPL, Caltech, ‡ KAIST, KSE

Monitoring Center. Sonobuoy. Monitoring Center. VAPR: Void Aware Pressure Routing Protocol. Sonobuoy. f. g: Local Maxmum. h. a. i. e. b. d. c. Youngtae Noh, Paul Wang†, Uichin Lee‡, Mario Gerla UCLA , CS † JPL, Caltech, ‡ KAIST, KSE

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Youngtae Noh, Paul Wang†, Uichin Lee‡, Mario Gerla UCLA , CS † JPL, Caltech, ‡ KAIST, KSE

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  1. Monitoring Center Sonobuoy Monitoring Center VAPR: Void Aware Pressure Routing Protocol Sonobuoy f g: Local Maxmum h a i e b d c Youngtae Noh, Paul Wang†, Uichin Lee‡, Mario Gerla UCLA , CS †JPL, Caltech, ‡KAIST, KSE {ytnoh, gerla}@cs.ucla.edu, paul.wang@jpl.nasa.gov, uclee@kaist.ac.kr • GOAL: VOID aware routing to Sonobuoys • 3D geographical routing too expensive, requires localization • Pressure gauges cheap => Greedy pressure routing to SonoBuoy • Still must avoid Local Maximum Our Solution: Locking void regions (or void removal) via push-down beacon message Greedy Routing downwards and upwards within locked void regions Push-down Message(part of periodic beaconing) Void region Greedy forwarders Adjacent nodes: Dead end nodes Push-up Message (part of periodic beaconing) Energy consumption per packet in VAPR better than HydroCast [2]. DBR consumes nearly 6 times more energy due to packet broadcast. Packet delivery ratio in VAPR improves with node density. DBR [1] shows degradation due to absence of route recovery. Reference [1] H. Yan, Z. Shi, and J.-H. Cui. DBR: Depth-Based Routing for Underwater Sensor Networks. In IFIP Networking’08. [2] U. Lee, P. Wang, Y. Noh, L. F. M. Vieira, M. Gerla, J.-H. Cui. Pressure Routing for Underwater Sensor Networks. In IEEE INFOCOM'10. Supported by NSF Grant: SEA-Swarm

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