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ID:32020988
大小:1.85 MB
页数:59页
时间:2019-01-30
《【硕士论文】AODV路由技术的研究和改进.pdf》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、蚤痰帮遣大学襞±逾文揍要摘要近年泉,随着无线移动通信和移渤终端技术的商速发展,使樽光线Adhoe网络不塑在举事镶域中褥制了窥分豹发燧,在强弱领域中也得到了广泛的瘦周。晃壤Ad魏鼯嗣终蠢蔷诲多独商麓蠢点:不需要蠢宠豹罄磷设蓬,不器要羲竞嚣餮圭机,能够在任何时间、任何越点挟逮辩建起一个移渤通信网络,节点可以任意移动,网络描扑结构动态炭化等。无线AdhoeN终的遮照特点为翻组网黯由设计摁爨了诲多辫的逡纛窝揽敞。本文详姻逡磷究了Adhoe嚣鳝黪国游遂,奔缓了餐释瑷杏熬辫遗谚设,院鞍分析了现祷备种Adhoe路由
2、协议的忧缺点,其中AODV路由协议淡现出了路由机制楚荸、瓣愤,易于实飒+羽终可扩糙性好等特点。在现有的AODV协议中,节煮翡蘧国表中存赣藿下一麓戆苇点缕惑,著量只要该踌交爨褥活灌裁一壹键藤它。即是说晟要链路不断,路由就舍~赢保持它的连通往。但怒越长的路由耩赞的带宽会聪多,连不通懿可能性就越穴。这样的商祭蔗严重影响潮络性能并糕赞丈量魏资滋,产生长路蠢瑷象。琏赘AODV孛节点的增多,疆络交褥越寒越丈,降低路蠢鼹乎均癸§数,瓣窿踌鸯豹可嚣穗交褥越窳越黧要。本文掇盎了一静纂予AODV的潞由优化机N《POM(P
3、athOptimizingMechanism)来解决这个问题;如粜一条较短姻鼹出嚣在,就尽可能夔荚交艇,并避免优化过程中不必要骢通信中断,滨瑰嚣黎切换,POM:莲现毒麓豢宽鞫爱建薅鬻建鼹蔫了瘸络豹戆麓嚣漫有蜷爨太多额外的赞源耗费。零文给出了这种方法的典体懿现,并且通道Ns2仿真模拟,给出了改谶方案和原AODv协议在端剐端延迟、路衽优化率、路豳开销、传输簿塑令方瑟瓣毙较。努辑显示凌迸方絮在不影鞠强协淡蛙缝嚣基戳土,在黯爨优他率、璃到满延遮藕传瀚辫笛性穗上帮育显著提赢。美毽谣;移动AdHoe鄹终,AODV
4、,妖蘧交,落毫稳毽瓿裁,德经,秃缝切换薹麦部奄大学硬±论室攥要AbstractWithwirelesscommunicationandmobileterminalmakinggreatprogress,wirelessAdhocnetworkisw4delyappliednotonlyinmilitaryrealmbutalsocivilrealm.WirelessAdhocnetv∞orkhavemanycharacteristics:Nofixedinfrastructureissupported
5、;nopre-configureSelw-er,callrapidlyorganizeamobilenetwork艇anytimeandanyplace;anynodeseanrandommove;networktopologicalstrucOaredynamicchangeetc.TherearemanyproblemsandchallengesinroutingresearchingofwirelessAdhoenetwo漱.ThepaperparticularlyresearchAdhoero
6、utingproblem+introducemanyexistedroutingprotocolsandanalysestheseprotocols,TheAODVisagoodroutingprotocolforAdhoenetwork,TheAODVshowmanyadvantages.suchasroutingmechanismissimpleandpellucid,easilyachieved,andnetworkextendable。IntheexistingAODVprotocols,th
7、eroutetableofnoderecordandusetheinformationofthenexthopiftheroutekeepitsactivity.Onlyifthelinkisn’tbroken,theroutekeepsitsconnectivi攀Longerrouteeo嚣s驻氆键琳。瓣bandwidth,power,andmorepronetodisconnections,Thisheavilyaffectstheperformance,consumeslotsofresourc
8、esofthenetworkandbringsaboutphenomenon.黝thesumofriodesincreasinginAODV,thenetworkbecomebiggeranditisimportanttodecreasetheaveragehopsandincreasethereliability,Thispaperproposesapathoptimizingmechanism(pOM)resolvetheproblem:Ittrie
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