无线网络的丢包问题

1、Wireless NetworkA Comparison of Mechanisms for Improving TCP Performance over Wireless LinksDirected Diffusion: A Scalable and Robust Communication Paradigm for Sensor NetworksA Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing ProtocolsAn End-to-End Approach to Host MobilityA Scal

2、able Location Service for Geographic Ad Hoc RoutingMACAW: A Media Access Protocol for Wireless LANs1An End-to-End Approach to Host MobilityCommunication modalNo third part End-to-end architectureSecure updates to DNS（locate）TCP connection migration options（mobile）Security of the architectureSecure D

3、NS update protocolSecure connection migration mechanismIPsec2Mobile IPInternetHome AgentCorrespondent hostForeign AgentCare-of addressAn End-to-End Approach to Host MobilityA3TCP migrate optionTCP connection migrationAInternetCorrespondent hostTCP migrate-permitted optionAn End-to-End Approach to Ho

4、st Mobility4An End-to-End Approach to Host Mobility5An End-to-End Approach to Host Mobility6Directed Diffusion: A Scalable and Robust Communication Paradigm for Sensor NetworksSignificant energy efficiency.Stable under network dynamic.Design of sensor radio MAC layer.Novel featureData-centric dissem

5、ination ReinforcementIn-network data aggregation and caching7interestSourceSinkeventgradientA simplified schematic for directed diffusion Directed Diffusion: A Scalable and Robust Communication Paradigm for Sensor Networks8Directed Diffusion: A Scalable and Robust Communication Paradigm for Sensor N

6、etworksAn interestType = four-legged animalInterval = 1sRect = -100, 200, 200, 400Timestamp = 01:20:40ExpiresAt = 01:30:409A simplified schematic for directed diffusion SourceSinkeventgradientReinforced pathDirected Diffusion: A Scalable and Robust Communication Paradigm for Sensor Networks10A Compa

7、rison of Mechanisms for Improving TCP Performance over Wireless Links无线网络的丢包问题解决方案End-to-EndSplit-connection basedLink layer结论11A Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing ProtocolsAd Hoc 网络特点有限的安全性、分布式控制、多跳通信、能量限制、节点带宽限制和变化的链路容量、动态拓扑、网络自主性路由技术高度自适应的路由、维护网络拓扑的连接、能感知网络拓扑结构的变

8、化DSDV、TORA、DSR、AODV 使用ns进行网络模拟，对协议的改进12A Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing Protocols13MACAW: A Media Access Protocol for Wireless LANs隐藏终端，暴露终端对MACA中的RTS-CTS-DATA信息交换以及延迟算法进行了改进延迟算法带宽的公平分配冲突避免14MACAW: A Media Access Protocol for Wireless LANsMACA 协议延迟算法CTSRTSDATARTSABCDRTS15无线通信的发展16无线通信的发展移动通信网2G: GSM，CDMA，TDMA，PDC2.5G: GPRS、cdma 2000 1x、EDGE3G: WCDMA、cdm