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ComparisonsbetweenLowPowerWirelessTechnologiesBluetoothlowenergy,ANT,ANT+,RF4CE,ZigBee,Wi-Fi,Nike+,IrDAandNFCPhillSmithMarketingManagerHBU,CSRplcWhitepaperAbstractManyinnovativenewusecasesarenowbeingmadepossiblewiththeintroductionofultralowpowerwirelesschipsets.Untilrecently,theonlywaytoachievedatatransferbetweenasensorandclienthasbeentousewires,ormanuallycollectdatafromaloggingdevice.Wirelesstechnologieshavebeenavailablefordecades.However,theytendtousesignificantamountsofpowerandneedspecializedequipmenttoestablishcommunications.Mosttargetmarketsarecharacterizedbyperiodictransferofsmallamountsofsensorinformationbetweensensornodesandacentraldevice.Someidentifiedendproductsthatmayimplementalowpowerradiosystem,includecellphones,healthandfitnessdevices,homeautomation,heating,ventilating,andairconditioning(HVAC),remotecontrols,gaming,humaninterfacedevices(HID),smartmeters,paymentandmanyothers.Theseapplicationsareallconstrainedbythefollowingcriticalkeyrequirements:ultralowpower,lowcostandphysicalsize.Theultralowpowerrequirementismainlyduetotargeteddevicesneedingtooperateforextendedperiodsoftimefromcoincellsorenergyscavengertechnology.Apartfromalowchipsetcosthavingobviousadvantages,overallproductexpenseislargelyaffectedbythepowersource.Forexample,ifashoppingmallhasawirelessbeaconineveryshopandbatteriesneedreplacingregularly,themaintenancecostwillsoonoutweightheadvantagesofsuchatechnologybeingdeployed.Thisdocumentanalysestheprosandconsofvariouslowpowerwirelesstechnologiesandleavesituptothereadertodecidewhichtechnologyismostsuitablefortheirintendedproduct.Thiswhitepaperdescribesthedifferencesbetweenvariouscompetingwirelesstechnologiesintheultralowpowermarketplace.WhitepaperTableofContentsAbstract...................................................................................................................................................2BackgroundonBluetoothlowenergy..................................................................................................5WhatisANT?...........................................................................................................................................5WhataboutZigBee?...............................................................................................................................6DoesRF4CEtickalltheboxes?............................................................................................................6HowdoesWi-Ficompare?.....................................................................................................................6WhatisNIKE+?.......................................................................................................................................6Doesn'tIrDAsolvetheproblemsalready?...........................................................................................7IsNFCgoingtotakeover?.....................................................................................................................7NetworkTopologies................................................................................................................................7Whichtechnologysupportswhichtopology?.....................................................................................8IsBluetoothlowenergyeasytoimplement?.......................................................................................8Whatdoesitcosttomanufacturelowenergydevices?....................................................................11Efficiency...............................................................................................................................................13Protocol..............................................................................................................................................13ANT....................................................................................................................................................13Bluetoothlowenergy..........................................................................................................................13PowerEfficiency...................................................................................................................................14ANT....................................................................................................................................................14Bluetoothlowenergy..........................................................................................................................14IrDA....................................................................................................................................................14Nike+..................................................................................................................................................15Wi-Fi...................................................................................................................................................15Zigbee........