The Vision of Mobile Ad Hoc Networking
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Transcript of The Vision of Mobile Ad Hoc Networking
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8/10/2019 The Vision of Mobile Ad Hoc Networking
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Anytime,Anyplace,AnyhowMultimediaWirelessAccess:
TheVisionofMobileAdHocNetworking
Prof.GeorgeN.Aggelou, InstituteofTechnology,Athens,Greece,Director,G-Alpha
Telecomms,Athens,Greece
TutorialOverview:
Thepastdecadehasshownaphenomenalgrowthinwirelesscommunications.CellularsystemshavebeenstandardizedandPersonalCommunicationServices(PCS)andthe3rdgenerationradiotechnologyarebeingusedprovidingwide-bandservicestomobileusers.
Additionally,wirelessnetworkingisbeingusedmoreandmoreinbothfixedandmobileusagescenarios,whereashighqualitymultimedia(voice,videoanddata)servicesoverhigh-speedwirelesslocalareanetworks(LANs)arebecomingareality.WirelessLANs(e.g.HiperLAN2,IEEE802.11),beinginterconnectedtoafixednetwork,areofferingupto54Mbpsboth toresidentialand businessenvironmentswith high qualityofservice(QoS).Thedemandofthesemultimediaapplicationshasbeenlargelywitnessedsofarinfixednetworksbutaslifestyleisrapidlychanging,internet-likeapplicationsaremoreandmoreattractivetomobileusersaswell.
Inparallelwith(andseparatelyfrom)thesinglehopmodelfortodayscellular/wirelesscommunications,anothertypeofmodelbasedonradiotoradiomultihopping,hasbeen
evolving to serve a growingnumber of applicationswhich rely on a fast deployable,multihop,wirelessinfrastructure.Amultihopmobileradionetwork,alsocalledmobileadhoc network (MANET) is a self-organizing and rapidly deployable network in whichneither a wired backbone nor a centralized control exists. The network nodescommunicatewith oneanotherover scarcewirelesschannels inamulti-hop fashion.The ad hoc network is adaptable to the highly dynamic topology resulted from themobilityofnetworknodesandthechangingpropagationconditions.
MANETs are a new paradigm of wireless wearable devices enabling instantaneousperson-to-person, person-to-machine or machine-to-person communicationsimmediatelyandeasily.Possiblecommercialapplicationsincludebusinessassociates
sharinginformationduringameeting,studentsusinglaptopcomputerstoparticipateinan interactive lecture, and emergencydisaster reliefpersonnel coordinating efforts innatural disasters. In these applications, where a fixed backbone is not available, areadilydeployablewirelessnetworkisneeded.Mobileadhocnetworksarealsoagoodalternative in rural areas or third world countries where basic communicationinfrastructure isnotwell established.Another interestingapplicationofmobileadhocnetworks isubiquitouscomputing. Intelligentdevicesareconnectedwith one another
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viawireless linksandareself-organizedin suchaway thatanewly joinednodecanrequestservicefromlocalserverswithoutanyhumanintervention.
Whendesigningmobileadhocnetworks,severalinterestinganddifficultproblemsarisedue to shared nature of the wireless medium, limited transmission power (range) of
wirelessdevices,nodemobility,andbatterylimitations.Thelimitedtransmissionrangeofwirelessnetwork interfaces coupledwith thehighly dynamic routing infrastructure,due to mobility, create a lot of concerns when addressing issues such as dynamicrouting,efficientchannelaccessandquality-of-service(QoS)support.
Thistutorialwilldescribefirstthe ideaofadhocnetworkingandscenarioswherethistechnologywillmake an impact.How the environmentofanadhoc network is verydifferentfromthewiredenvironment,andtheeffectthishasonthedesignandoperationofroutingprotocolsforadhocnetworkswillbeextensivelyexplained.Adescriptionofanumberofdifferentissuesrelatedtomediumaccesscontrol(MAC),routing,andQoSinmobile ad hoc networks, including the prominent protocols under consideration forstandardizationbytheIETF,willfollowup.
Finally, integration issues with wide area mobility models, such as Mobile-IP, andCellular systems, such as the GSM, will also be presented. Open problems andchallengesforadhocnetworkswillconcludethepresentation.
TutorialOutline:
1. INTRODUCTIONTOWIRELESSNETWORKS
a. GSM/GPRSwirelesscommunicationssystems
b. BaselineUMTSinfrastructure
c.
EvolutionofAll-IPwirelessnetworks
2. MOBILEADHOCNETWORKING
a. Issues&Applications
b.
ResearchChallenges:fromMACtoTransportLayer
3. DYNAMICROUTINGINMOBILEADHOCNETWORKS
a.
RoutingproblemsinMANETs
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b. StandardizationeffortsandtheroleoftheIETFMANETWG
c. Overview of IETF MANET Routing Protocols & Analysis of the RDMARprotocol(IETFcandidatebyG.N.Agglou)
4. WIRELESSMEDIUMACCESSCONTROL/CHANNELACCESSPROTOCOLS
a. ProblemsatWirelessAccessLayer
b. OverviewofIEEE802.11&ETSIHIPERLANtype2protocols
c. Analysis of MBCA/BRCA Channel Assignment (Filed for Patentby G. N.Agglou)
5. QUALITY-OF-SERVICE(QOS)INWIRELESS/MOBILENETWORKS
a. Issues&problems
b. QoSSignallingprotocols
c. FrameworkforQoSWirelessAccess
6. INTEGRATIONWITHWIDE-AREAMOBILITYMODELS
a. Issues,Challenges&SystemRequirements
b. AnalysisofanintegratedGSM-MANETmodel(ProposedmodeltoNokia3GLab/UKbyG.N.Agglou)
7. CONCLUSIONS&DISCUSSION
IntendedAudience:
This presentation is designed to provide an overview of research issues related tomobile ad hoc networking. The presentation should benefit researchers as well aspostgraduatestudentsfromacademia,whoareinterestedinareasrelatedtowirelesscommunicationsandmobilenetworking.
Speaker'sBiography:
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GeorgeN.Aggelou([email protected])isafull-timeProfessorintheInstituteofTechnology,Athens,GreeceanddirectorofG-AlphaTelecomms,Athens,Greece.HeholdsaPh.D.inMobileMultimediaAdHocNetworks,aB.Eng.inCommunicationsNetworksandaB.Sc.inElectronics.
InthepastyearsGeorgehasjoinedvariousinternationalcompanies,includingIBM,ThomasJ.WatsonResearchCenter,NYasaresearchassistant,D.M.Data,NJasaseniorsoftwareengineer,CISCOSystems,London,UKasaUMTSConsultantEngineerandINTRACOMS.A,Athens,GreeceasaseniorUMTSresearchengineer.In1999,healsoco-foundedMobileE-CommerceTechnologies,inLondon,UK.
Georgeistheeditorofanumberofconferenceandjournalpublications,IETFdraftsandonepatent.HeistheauthorofthebookMobileAdHocNetworking:DesignandIntegrationbyMcgraw-Hill,February2003,andco-authorofthebookHandbookofWirelessAdHocNetworksbyCRCPress,September2002.HehasservedasatechnicalprogramcommitteememberinanumberofinternationalconferencesandasapanelistatATAMS'2001.HeisamemberoftheeditorialboardoftheIEEETransactionsonWirelessCommunications(TWireless).Georgewastherecipientofthe2000RACALPrizeforResearchExcellence,honoredbyDr.ChrisAsh,RACALResearchDirector.
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