ChenLee_1的留言板

ChenLee_1 2020-01-02 06:49:17

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WirelessnetworksareevolvingintowirelessIP(InternetProtocol)networksto overcomethelimitationsoftraditionalcircuit-switchedwirelessnetworks.Wireless IPnetworksaremoresuitableforsupportingtherapidlygrowingmobiledataand multimediaapplications.IPtechnologiesbringthegloballysuccessfulInternet servicecreationandofferingparadigmtowirelessnetworks,bringingthevastarray ofInternetservicestomobileusersandprovidingasuccessfulplatformforfostering futuremobileservices.IP-basedprotocols,whichareindependentoftheunderlying radiotechnologies,arealsobettersuitedforsupportingseamlessservicesover heterogeneousradiotechnologiesandforachievingglobalroaming. Wirelessnetworksareevolvingontwomajorfronts.First,radioaccesssystems areevolvingtothirdandfourthgenerationsystemsthatcansupportsignificantly highersystemcapacityandper-userdatarateswithenhancedquality-of-service (QoS)supportcapabilities.Second,wirelessIPnetworkingtechnologiesare profoundlychangingtheoverallwirelessnetworkarchitecturesandprotocols. Manybooksareavailableonradioaccesssystems,examiningthephysical,link, andnetworklayersspecifictoeachradiosystem.Fewbooks,however,havebeen designedtosystemicallyaddressthewirelessIPnetworkingaspect,i.e.,archi- tectures,protocols,andtechniquesattheIPlayerandaboveofawirelessIP network.Thisbookseekstoprovideasystematicdescriptionandcomparisonof next-generationwirelessIPnetworkarchitectures,systems,andprotocols,witha focusontheIPlayerandabove. SeveralmajoreffortshaveemergedtodefineglobalstandardsforwirelessIP networks.Thetwomostinfluentialstandardsbodiesare3GPP(ThirdGeneration PartnershipProject)and3GPP2(ThirdGenerationPartnershipProject2).Different standardseffortshavebeentakingsignificantlydifferentapproaches,whichleadto differentarchitecturesanddifferentmigrationpathstowardfuturewirelessIP xi networks.ThisbookprovidesinsightsintocriticalissuesinwirelessIPnetworking, thoroughlyillustratesthestandardsandnetworkarchitecturesdefinedbyleading standardsbodiessuchas3GPPand3GPP2,anddiscussesindetailprotocols andtechniquesinfourmajortechnicalareas:signaling,mobility,security,and QoS. Toprovidethenecessarybackground,thebookstartsbypresentingahistorical overviewoftheevolutionofwirelessnetworksinChapter1,Introduction.Chapter1 thenreviewstheevolutionofpublicmobileservicesbyexaminingthefirst,second, andcurrentwavesofmobiledataservices.Itcontinuesontodiscussthemotivations forIP-basedwirelessnetworksandprovidesanoverviewofrelatedstandards activities. Chapter2detailsthenetworkarchitecturesdefinedby3GPPand3GPP2.Tohelp readersquicklygetasenseofthesolutionsproposedby3GPPand3GPP2andto easilyidentifytheirfundamentaldifferences,Chapter2presentsthemostimportant aspectsofthearchitecturesproposedby3GPPand3GPP2inaconsistentformatand highlightstheirmajordifferences.Inaddition,theall-IPmobilenetworkarchitecture proposedbytheMobileWirelessInternetForum(MWIF)isalsodiscussed. Chapters3to6addresssystematicallyfourofthemostcriticaltopicareasinnext- generationwirelessnetworks:signaling,mobilitymanagement,security,andQoS. BecauseChapter2discussesnetwork-layersignalingandcontrolnecessaryforthe operationsofthenetworks,Chapter3focusesonapplication-levelsignalingand sessioncontrolneededtosupportreal-timeandmultimediaapplicationsinIP networksandintheIPMultimediaSubsystems(IMS)definedby3GPPand3GPP2. Chapters4,5,and6discussissuesandsolutionsrelatedtomobilitymanagement, networksecurity,andQoS,respectively.EachchapterlooksfirstatthesubjectinIP networks,thenatthearchitecturesandprotocolsdefinedby3GPPand3GPP2.The MWIFspecificationsarediscussedinsomechaptersifrelatedissuesinMWIFare alsoaddressed. Thebookisdesignedprimarilyforresearchers,engineers,technicalmanagers, andgraduateandundergraduatestudents.PeopleenteringthefieldofwirelessIP networkingwillalsofindthisbookahelpfulreference.Thebookemphasizesthe principlesunderlyingeachmajorarchitectureandillustratestheseprincipleswith abundanttechnicaldetails.Itprovidestheaudiencewithperspectivesthatare difficulttoobtainfromreadingthestandardsspecificationsdirectly. WearegratefultotheITSUMO(InternetTechnologiesSupportingUniversal MobileOperation)teamfromTelcordiaTechnologies,Inc.andToshibaAmerica Research,Inc.(TARI).OurworkontheITSUMOprojectanddiscussionswiththe ITSUMOmemberscontributedtothebook.SpecialthanksareduetoDr.Prathima AgrawalofTelcordiaandDr.ToshikazuKodamaofTARIfortheircontinuous supportandinvaluableadvicethroughoutthewritingofthebook.WethankMr. Chi-ChenLee,Mr.Jui-HungYeh,andMr.Chih-HsingLinoftheNationalTsing HuaUniversityforpreparingmanyofthefigures,tables,andreferencesinthebook. Jyh-ChengChenwouldalsoliketoacknowledgetheprojectmembersofthe “ProgramforPromotingAcademicExcellenceofUniversities”formanyinsightful xii PREFACE discussions.Jyh-ChengChen’sworkwassupportedinpartbytheMinistryof Education,Taiwan,NationalScienceCouncil(NSC),andIndustrialTechnology ResearchInstitute(ITRI). Jyh-ChengChen TaoZhang

纯spring_web工程_例.zip

java远程获取数据_java工程

tomcat6.x源码编译时需要依赖的所有JAR包：包括ant.jar、jaxrpc.jar、org.eclipse.jdt.core_3.8.3.v20130121-145325.jar、wsdl4j-1.5.1.jar。编译tomcat源码时把这些JAR包引入就可以了，亲测不报错，完全可用。 tomcat源码调试步骤： 1.到官网下载源码，解压 2.在根目录下把build.properties.default文件名去掉后面的.default 3.把该文件中的base.path值改成你自己指定的目录 4.在根目录中运行ant download,成功后再运行ant 5.新建JAVA Project，把根目录中的Java、test复制到工程中，并设置成build path, 6.引入我提供的JAR包，编译 7.找到Bootstrap.java，debug as>debug configurations>VM arguments:输入-Dcatalina.base="（改成你自己的）E:\apache-tomcat-6.0.37-src\output\buildoutput\build" 8.OK.

UPX 是一款先进的可执行程序文件压缩器压缩过的可执行文件体积缩小50%-70% 这样减少了磁盘占用空间、网络上传下载的时间和其它分布以及存储费用。通过 UPX 压缩过的程序和程序库完全没有功能损失和压缩之前一样可正常地运行对于支持的大多数格式没有运行时间或内存的不利后果。

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