Download - The Vision of Mobile Ad Hoc Networking

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.
mailto:([email protected])mailto:([email protected])

Download - The Vision of Mobile Ad Hoc Networking

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