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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-sornetworksthatattemptstoprovidetheinteractivityofeltyinthisworkliesinextensiveuseofpredictivetechniquesthedatastreamingapproachwiththeenergyefficiencyofthatareanaturalfittothecorrelatedbehaviorofthephys-thedirectsensorquerying.PRESTOdiffersfrompasticalworld.
4、PRESTOexploitstechnologytrendsinstorageworkondata-centricsensornetworksinseveralkeyre-tobuildanarchitecturethatemphasizesarchivalatremotespects(seeTableI).sensorsandintelligentcachingatproxies.Thesystemalsoaddressesuserneedsforqueryingsuchsensornetworksby•HierarchicalSystems:Ratherthandesigningoursy
5、s-exposingaunified,easytousedataabstractionacrossnu-temforasingleflatsensornetworkarchitecture,PRESTOmerousproxiesandremotesensors.reflectsourphilosophythatscalablesensornetworksofthefuturewillhavemultipletiers,withaseveraltensofI.INTRODUCTIONuntetheredsensorspertetheredsensorproxyandseveralManydiffere
6、ntkindsofnetworkeddata-centricsensortensofsensorproxiesperapplication.Beingtethered,sen-systemshaveemergedinrecentyears.Sensorsgeneratesorproxiescanbeexpectedtobelessresourceconstraineddatathatmustbeprocessed,filtered,interpreted,cached,thantheremotesensors,anaspectthatPRESTOexploitsandarchivedinorde
7、rtoprovideausefulinfrastructureforintwodifferentways.Proxiescachecurrentandpastusers.Sensorsareoftenuntethered,andtheirenergyre-datafromremotesensorsandusepredictivetechniquesonsourcesneedtobeoptimize
