文件名称：3G.Evolution.HSPA.and.LTE.for.Mobile.Broadband - Academic Press 1st.Edition.2007
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LTE 3G HSPA
无线通信经典图书. Preface Duringthepastyears,therehasbeenaquicklyrisinginterestinradioaccess technologiesforprovidingmobileaswellasnomadicandfixedservicesforvoice, videoanddata.Thedifferenceindesign,implementation,andusebetweentelecom anddatacomtechnologiesisalsogettingmoreblurred.Oneexampleiscellular technologiesfromthetelecomworldbeingusedforbroadbanddataandwireless LANfromthedatacomworldbeingusedforvoiceoverIP. Today,themostwidespreadradioaccesstechnologyformobilecommunicationis digitalcellular,withthenumberofuserforecastedtoreach3billionby2007,which isalmosthalfoftheworld’spopulation.Ithasemergedfromearlydeployments ofanexpensivevoiceserviceforafewcar-borneusers,totoday’swidespread useofthirdgenerationmobile-communicationdevicesthatprovidearangeof mobileservicesandoftenincludecamera,MP3playerandPDAfunctions.With thiswidespreaduseandincreasinginterestin3G,acontinuingevolutionaheadis foreseen. Thisbookdescribestheevolutionof3Gdigitalcellularintoanadvancedbroadband mobileaccess.Thefocusofthisbookisontheevolutionofthe3Gmobilecommu- nicationasdevelopedinthe3GPPstandardization(ThirdGenerationPartnership Project),lookingattheradioaccessandaccessnetworkevolution. Thisbookisdividedintofiveparts.PartIgivesthebackgroundto3Gandits evolution,lookingalsoatthedifferentstandardsbodiesandorganizationsinvolved intheprocessofdefining3G.Itisfollowedbyadiscussionofthereasonsand drivingforcesbehindthe3Gevolution.PartIIgivesadeeperinsightintosome ofthetechnologiesthatareincluded,orareexpectedtobeincludedaspartofthe 3Gevolution.Becauseofitsgenericnature,PartIIcanbeusedasabackground notonlyfortheevolutionstepstakenin3GPPasdescribedinthisbook,butalso forreadersthatwanttounderstandthetechnologybehindothersystems,suchas WiMAXandCDMA2000. PartIIIdescribesthecurrentlyongoingevolutionof3GWCDMAinto HighSpeed PacketAccess (HSPA).ItgivesanoverviewofthekeyfeaturesofHSPAandits continuedevolutioninthecontextofthetechnologiesfromPartII.Following this,thedifferentuplinkanddownlinkcomponentsareoutlinedandfinallymore detaileddescriptionsofhowtheyworktogetheraregiven. PartIVintroducesthe LongTermEvolution (LTE)and SystemArchitectureEvo- lution (SAE).Asastart,theagreedrequirementsandobjectivesforLTEare described.ThisisfollowedbyanintroductorytechnicaloverviewofLTE,where themostimportanttechnologycomponentsareintroduced,alsoherebasedonthe generictechnologiesgiveninPartII.Asasecondstep,amoredetaileddescription oftheprotocolstructureisgiven,withfurtherdetailsontheuplinkanddownlink transmissionschemesandaccessprocedures.Thesystemarchitectureevolution, applicabletobothLTEandHSPA,isgivenwithdetailsofRadioAccessNetwork andCoreNetwork. FinallyinPartV,anassessmentismadeofthe3Gevolution.Anevaluationofthe performanceputsthe3Gevolutiontracksinrelationtothetargetssetin3GPP. Throughanoverviewofsimilartechnologiesdevelopedinotherstandardsbodies, itwillbeclearthatthetechnologiesadoptedfortheevolutionin3GPPareimple- mentedinmanyothersystemsaswell.Finallylookingintothefuture,itwillbe seenthatthe3GevolutiondoesnotstopwiththeHSPAEvolutionandLTE.