models and techniques for communication in dynamic networksnew

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1、odelsandTe hniquesforCommuni ationinDynami etworksChristianS heidelerDepartmentofComputerS ien eohnsHopkinsUniversity3400.CharlesStreetBaltimore,D21218,USAs heideler s.jhu.eduAbstra t.
nthispaperwewillpresentvariousmodelsandte hniquesfor ommuni

2、ationindynami networks.Dynami networksarenetworksofdynami allyhangingbandwidthortopology.Situationsinwhi hdy-nami networkso urare,forexample:faultynetworks(linksgoupanddown),the
nternet(thebandwidthof onne tionsmayvary),andwire-lessnetworks(mobileuni

3、tsmovearound).Weinvestigatetheproblemofhowtoensure onne tivity,howtoroute,andhowtoperformad-mission ontrolinthesenetworks.Someoftheseproblemshavealreadybeenpartlysolved,butmanyproblemsarestillwideopen.Theaimofthispaperistogiveanoverviewofre entresults

4、inthisarea,toidentifysomeofthemostinterestingopenproblemsandtosuggestmodelsandte hniquesthatallowustostudythem.1
ntrodu tion
nthispaperwepresentvariousmodelsandte hniquesfor ommuni ationindynami networks.Generallyspeaking,dynami networksarenetworksofd

5、y-nami allyhangingnetworkhara teristi ssu hasbandwidthortopology.Therearemanys enariosinwhi hdynami networkso ur.Forexample,axedinter- onne tionnetworkmightexperien e(adversarialorrandom)faults,orwemayhaveawirelessnetworkformedbyusersthatmovearound.

6、Also,the
nternet anbeseenasadynami network,sin esomevirtual onne tionsor ommu-ni ationlinksmightexperien elargedieren esintheiravailabilityovertime,oeringalowbandwidthatonetimeandahighbandwidthatanothertime.
nthefuture,dynami networkswillplayanin re

7、asinglyimportantrole,sin ethedevelopmentanddeploymentofpowerfuland exible ommuni ationsystemsthatarea essiblebylargepartsofthepopulationisseenasakey omponentforthetransitiontoaninformationso iety.Whilethishasbeendominatedinthepast10yearsbytheestablis

8、hmentofwired onne tionstothe
nternet,thisisnowshiftingmoreandmoretowireless onne tions,sin ewireless onne tionsoermu hhighermobilityand exibility.any ompaniesanduniversitieshavealreadydeployedwirelessa esspointsthatallowem-ployeesand/orstud