無(wú)線網(wǎng)絡(luò)的丟包問(wèn)題

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無(wú)線網(wǎng)絡(luò)的丟包問(wèn)題解決方案End-to-EndSplit-connection basedLink layer結(jié)論11A Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing ProtocolsAd Hoc 網(wǎng)絡(luò)特點(diǎn)有限的安全性、分布式控制、多跳通信、能量限制、節(jié)點(diǎn)帶寬限制和變化的鏈路容量、動(dòng)態(tài)拓?fù)?、網(wǎng)絡(luò)自主性路由技術(shù)高度自適應(yīng)的路由、維護(hù)網(wǎng)絡(luò)拓?fù)涞倪B接、能感知網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)的變

8、化DSDV、TORA、DSR、AODV 使用ns進(jìn)行網(wǎng)絡(luò)模擬，對(duì)協(xié)議的改進(jìn)12A Performance Comparison of Multi-Hop Wireless Ad Hoc Network Routing Protocols13MACAW: A Media Access Protocol for Wireless LANs隱藏終端，暴露終端對(duì)MACA中的RTS-CTS-DATA信息交換以及延遲算法進(jìn)行了改進(jìn)延遲算法帶寬的公平分配沖突避免14MACAW: A Media Access Protocol for Wireless LANsMACA 協(xié)議延遲算法CTSRTSDATARTSABCDRTS15無(wú)線通信的發(fā)展16無(wú)線通信的發(fā)展移動(dòng)通信網(wǎng)2G: GSM，CDMA，TDMA，PDC2.5G: GPRS、cdma 2000 1x、EDGE3G: WCDMA、cdm