Cross-Layer Caching Based Optimization for Wireless Multimedia Sensor Networks
Cross-Layer Caching Based Optimization for WirelessMultimedia Sensor Networks Nestor Tiglao and António Grilo INESC-ID/IST, Lisbon, Portugal
Outline Introduction Related Work Proposed Mechanisms Results Conclusion and future work WiMob 2012, Barcelona, Spain 2
Introduction WSN equipped with multimedia sensors give birth to WMSN They enable a new class of monitoring applications, but demanding in terms of: computational resources energy resources Need for innovative solutions: combination/optimization techniques at the different layers of the protocol stack WiMob 2012, Barcelona, Spain 3
Related Work Pump Slowly Fetch Quickly (PSFQ) Designed for dynamic code update, no real-time performance guarantees Distributed TCP Caching (DTC) Intermediate retransmission based on ACK/SACK semantic Reliable Multi-Segment Transport (RMST) Uses timer-based NACK repair Tunable Reliability with Congestion Control for Information Transport (TRCCIT) Uses MAC retry limit adaptation but considers end- to-end application reliability WiMob 2012, Barcelona, Spain 4
Analytical Model N. M. C. Tiglao and A. M. Grilo, “An analytical model for transport layer caching in wireless sensor networks,” Performance Evaluation, vol. 69, no. 5, pp. 227–245, 2012. [Online]. Available: http://www.sciencedirect.com/science/article/pii/S0 166531611001568 WiMob 2012, Barcelona, Spain 5
Conclusion and Future Work Ensemble of MAC and transport layer optimization provides better performance over non-optimized protocols Mechanisms are simple and generic enough for adoption by other transport protocols Future work: more complex and dynamic scenarios WiMob 2012, Barcelona, Spain 18
Thank you for your attention! WiMob 2012, Barcelona, Spain 19
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