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1、FoundationsTrendsR?inwkingVol.10No.4(2015)317–446c?2016M.BerioliG.CoccoG.LivaA.MunariDOI:10.15611300000047ModernRomAccessProtocolsMatteoBerioliZodiacInflightInnovationsTriaGnoSysGmbHArgelsriederFeld22WelingGermanymatteo.
2、berioli@GiuseppeCoccoGermanAerospaceCenterOberpfaffenhofenWelingGermanyanluigiLivaGermanAerospaceCenterOberpfaffenhofenWelingGermanydreaMunariRWTHAachenUniversityKackertstrasse9AachenGermanystractRomaccessrepresentspossi
3、blythesimplestyetoneofthebestknownapproachesfsharingachannelamongseveralusers.Sincetheirintroductioninthe1970sromaccessschemeshavebeenthoughlystudiedsmallvariationsofthepioneeringAlohaprotocolhavesincethenbecomeakeycompo
4、nentofmanycommunicationsstandardsrangingfromsatellitewkstoadhoccellularscenarios.Afundamentalstepfwardfthisoldparadigmhasbeenwitnessedinthepastfewyearswiththedevelopmentofnewsolutionsmainlybasedontheprinciplesofsuccessiv
5、einterferencecancellationwhichmadeitpossibletoembraceconstructivelycollisionsamongpacketsratherenduringthemasawasteofresources.Thesenewlinesofresearchhaverenderedtheperfmanceofmodernromaccessprotocolscompetitivetothatoft
6、heircodinatedcounterpartspavingtheroadfamultitudeofnewapplications.Thismonographexplesthemainideasdesignprinciplesthatarebehindsomeofsuchnovelschemesaimsatofferingtothereaderanintroductiontotheanalyticaltoolsthatcanbeuse
7、dtomodeltheirperfmance.AfterreviewingsomerelevantresultsftheromaccesschannelthevolumefocusesonslottedsolutionsthatcombinetheapproachofdiversityAlohawithsuccessiveinterferencecancellationdiscussestheiroptimisationbasedona
8、nanalogywiththetheyofcodesongraphs.Thepotentialofmodernromaccessisthenfurtherexpledconsideringtwofamiliesofschemes:thefmerbasedonphysicallayerwkcodingtoresolvecollisionsamongusersthelatterleaningontheconceptofreceiverdiv
9、ersity.Finallytheopptunitiesthechallengesencounteredbyromaccesssolutionsrecentlydevisedtooperateinasynchronousi.e.unslottedscenariosarerevieweddiscussed.M.BerioliG.CoccoG.LivaA.Munari.ModernRomAccessProtocols.Foundations
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