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1、传感器网络中分布式TCP缓存 -学习报告 报告人: 黄浩2006年5月目录nIntroductionnBackgroundnOverviewnDTC ImplementationnSimulation topologynResultsnConclusionIntroductionnWireless sensor networks consist of resource-constrained and sensor-equipped devices that communicate untethered.nMany applications of wireless sensor networks
2、 are useful only when connected to an external network.nDTC substantially reduces the overall number of TCP segment transmissions.nDTC decreases the number of end-to-end retransmissions.nDTC shifts the burden of the energy consumption from nodes close to the base station into the network.Backgroundn
3、IP addressing architecture.nHeader overhead.nAddress centric routing.nLimited nodes.OverviewDTC Implementation(1/2)nSegment Caching and Packet Loss DetectionDTC Implementation(2/2)nAlgorithm outlineSimulation topologyDTC load reduction near senderMeasured RTT by TCP sender, with DTCLocal RTT close t
4、o senderLocal RTT close to receiverDiscussionnApplicability of Unicast in Sensor NetworksnMemory ConsumptionnPacket Loss Rates and RoutingConlusionnDTC enhances TCP performance in sensor networksboth in terms of energy efciency and throughput.DTC achieves this by caching TCP segments inside the sensor network and retransmitting lost segments locally.nFurthermore, DTC shifts the burden of the load fromvulnerable nodes close to the base station into the sensor network.谢谢!
