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1、UniversityofMassachusetts,TechnicalReportTR05-051?PRESTO:APredictiveStorageArchitectureforSensorNetworksPeterDesnoyers,DeepakGanesan,HuanLi,PrashantShenoyUniversityofMassachusettsAmherstAbstract—WedescribePRESTO,apredictivestoragear-actuallyqueried.chitectureforemerginglarge-scale,hierarchicalsensor
2、net-Whileboththesemodelsareimportantforcurrentandworks.Incontrasttoexistingtechniques,PRESTOisafuturesensornetworks,theyhavecertaindrawbacks.Inproxy-centricarchitecture,wheretetheredproxiesbalancetheneedforinteractivequeryingfromuserswiththeenergythispaper,wepresentPRESTO,apredictivestoreforsen-opti
3、mizationneedsoftheremotesensors.Themainnov-sornetworksthatattemptstoprovidetheinteractivityofeltyinthisworkliesinextensiveuseofpredictivetechniquesthedatastreamingapproachwiththeenergyef?ciencyofthatareanatural?ttothecorrelatedbehaviorofthephys-thedirectsensorquerying.PRESTOdiffersfrompasticalworld.
4、PRESTOexploitstechnologytrendsinstorageworkondata-centricsensornetworksinseveralkeyre-tobuildanarchitecturethatemphasizesarchivalatremotespects(seeTableI).sensorsandintelligentcachingatproxies.Thesystemalsoaddressesuserneedsforqueryingsuchsensornetworksby?HierarchicalSystems:Ratherthandesigningoursy
5、s-exposingauni?ed,easytousedataabstractionacrossnu-temforasingle?atsensornetworkarchitecture,PRESTOmerousproxiesandremotesensors.re?ectsourphilosophythatscalablesensornetworksofthefuturewillhavemultipletiers,withaseveraltensofI.INTRODUCTIONuntetheredsensorspertetheredsensorproxyandseveralManydiffere
6、ntkindsofnetworkeddata-centricsensortensofsensorproxiesperapplication.Beingtethered,sen-systemshaveemergedinrecentyears.Sensorsgeneratesorproxiescanbeexpectedtobelessresourceconstraineddatathatmustbeprocessed,?ltered,interpreted,cached,thantheremotesensors,anaspectthatPRESTOexploitsandarchivedinorde
7、rtoprovideausefulinfrastructureforintwodifferentways.Proxiescachecurrentandpastusers.Sensorsareoftenuntethered,andtheirenergyre-datafromremotesensorsandusepredictivetechniquesonsourcesneedtobeoptimize
