eACTTechnologiesSingapore/Malaysia

Duration:5days

Handson:Wiresharkbasedreal-lifeWi-Fipackettraceanalysis

Demos:AletheaWicheckmulti-STAemulatorforunderstandingperformanceofWi-FiAPsandtostudyimpactofmultipleclientsrunningdifferenttraffictypesDemousingWLANPitoshowcasethepowerfulsniffingusingsimpletools

Day1:Wi-FiTechnologyOverview

• Wi-FIOverview• IEEE802.11standardsanditsrole• WFAanditsrole;interoperabilityandcertification• Relationshipbetween802.11andWi-Fi• Wi-Finetworks;BSS/IBSS/P2P/mesh•BSS,IBSS,ESS,DS,BSSID,SSID,MBSS•TypicalevolutionoftheWi-FiAPalongwiththeecosystem

•Importantchipsetplayers•ODMs•Breakupofsolution;software,hardware,andfirmware•Roleofopen-sourcesolutionslikeopenWRT

•Wi-Fidirectvs.ad-hocnetworks;differences•MeshandWDS;whatistheneed?.•IEEE802.11setofstandardsandtheirevolution

•Speedsandbandwidths•Keytechnologies;OFDM,MIMO,andtheirimpacts•Upcomingstandards;newtechnologieslikeOFDMA

•Spectrumofoperation•Security,QoS,andotherfeaturesevolution

eACTTechnologiesSingapore/Malaysia

•WLANdeploymentscenarios;homevs.hotspotvs.serviceprovidervs.enterprise•Wi-Fiproductspace;asurveyofsomeinterestingfeatures•Wi-FiandIOT;linkwithBLEandZigbee/Thread•802.11ba;Wi-FiWakeupradioanditsimpacts•Wi-Fiandvoice;Wi-Ficalling•Wi-FiandLTEunlicensed•802.11ad/ay;60GHzWi-Fistatus• FutureofWi-Fi;multibandoptimization,optimizedconnectivityand

otherinitiatives

Day2:Wi-FiPHY.Layer

• Challenges;thechannelenvironment• Problemswithhighdataratecommunication• RoleofPHY.Layerin802.11• 2.4and5GHzchannels;20/40/80/160MHzbandwidthoperations• PowerofWi-Fi;useofdBs,dBms,dBi• DFS;Whyandsomerules• Modulationanderrorcontrolcoding;MCS• PHY.layertechnologyevolution;802.11/11b/11a/11g/11n/11ac• OFDMfundamentals

o Subcarrierspacing,OFDMsymbolperiod,cyclicprefix

eACTTechnologiesSingapore/Malaysia

o CalculationofPHY.Datarateanditsimplication• OFDMin802.11..evolutionandcalculations

• MIMObasicso Differencesbetweendiversity,spatialmultiplexing,andSTBCo CostsofMIMO

• Spatialstreams;productandlinkconfigurationsandtheirimpacts• Dataratecalculations;differentratesofoperationinaWi-Finetwork• Receivesensitivity• Beamforming

o DifferenceswithSTBCo Feedbacksteps

• MU-MIMOo HowisitdifferenttonormalMIMOo Advantageso Linkswithbeamforming

• FutureofthePHYin802.11o OFDMAo MU-MIMOenhancements

Day3:MediumAccessControlConceptsandWi-FiOperations

• RoleofMAC,interactionswithotherlayers• Terminology;MSDU/MPDU,header,FCS• DCFProtocolinWLAN• CSMA/CA–RoleofPHYinCCA• DCFparameters;DIFS/SIFS,slottime• BasicDCFframeexchange• Hiddennodeproblems• RTS/CTS/CTS-Self;virtualcarriersensing,NAVconcepts• MACframeformats;typesofframes,frameheaders

eACTTechnologiesSingapore/Malaysia

• BasicDCFthroughputanalysis• MAClayeraspectsof802.11n

o Frameaggregationanditsimpacto A-MSDUandA-MPDUo TCP/IPandUDP/IPthroughputimpactwithaggregationo MACframeimpactswithframeaggregationo BlockAcknowledgementandTXoP

• Beacons

• NetworkEntryProcess–ActiveandPassiveScanning• Association• SecurityConceptsinWLAN

o WPA/WPA2/WPS• VirtualAPs• Evolutionofpowersavetechniques(Legacy,WMM,andSMpower

save)• Rateadaptation;typicalrates• QoSin802.11

Day4:UnderstandingWi-FiThroughPacketAnalysis

• QuickrecapofWi-Fiprotocolandcapabilitiesunderstanding• Dataframesaddressing

o Source/transmitanddestination/receiveaddressing• QoSControlfieldanalysis;A-MSDUandTIDinfo.

eACTTechnologiesSingapore/Malaysia

o QoSdatatypeo A-MSDUinsightso QoSaccesscategory

• Retransmissionsmonitoringo HowcanwedebugpotentialWi-Fiperformanceproblems?.

• MIMO;spatialstreams,STBC,antennasetc.• UseofRTS/CTS• PowersaveinWi-Fi;useofnullframes

• Wi-Firoamingwithout11r• 802.11rbasics• Traceanalysiswithandwithout11r

o 11rrelatedcapabilitiesexchangeo Differentkeysandtheirroles

• Useof11kanditsimpactso 11krelatedcapabilitieso Neighbourrequestmessages

• 11vBSSTransitionmanagementanditsimpactso 11vcapabilities

• HowtolookatPHY.Relatedinformation,MCS,rates,beamforming,bandwidthetc.

• APandclientsupportforbeamforming;wheretofindout?• Beamformingexample;startingfromSoundingtodatatransmission• Potentialproblemscenarios;wherecouldthingsgowrong?..

eACTTechnologiesSingapore/Malaysia

Day5:802.11ax

Module1:IntroductionandOverview(1.5hours)

• 802.11/Wi-FievolutionandStatus• Real-lifechallengesof802.11/Wi-Fi;high-density/largenumberofAPs..• Drawbacksof802.11ac• Motivationfor802.11ax• Newusecases• Statusofthestandardizationanddocuments• RFbandsofoperation• CompetitionfromLTE-unlicensed(LTE-U,LAA,andMuLTEfire)• LTEplusWi-Fiapproaches

Module2:802.11axtechnology-PHY(2hours)

• High-levelviewofdifferentPHY.modesin11ax• OFDMvs.OFDMA• ConceptofRusandsplitsofvariousbandwidths• Outdooroperation• HandlingmultipleusersontheDL;MU-MIMOandOFDMA

§ OFDMAanditsdifferenceswithplainOFDM§ WhyOFDMAfor11ax?.§ OFDMAdetailsandoptionsfordifferentbandwidths§ Codingandhigherordermodulationpossibilitiesin11ax

eACTTechnologiesSingapore/Malaysia

§ Ratesin11acvs.11ax

Module3:MultiuserOperationin802.11ax(2hours)

• Currentmultiuserframeworkin802.11• Performanceof802.11inhigh-densityenvironments• Challengesduetocontrolandmanagementframes• Downlinkmultiuseroperationaldetails

o Scheduling• Uplinkmultiuseroperations

o Schedulingandtriggering

Module4:MACenhancementsin802.11ax(1.5hours)

• CSMA/CAchallengesin802.11inpresenceofmultipleBSS• DynamicCCAThresholds

o Motivationo Approachestosolveproblemo Coexistencechallenges

• 802.11axchannelaccessrule• NAVsettingsin11ax• Spatialreuserulesandimpacts..• RTSenforcement• Multi-BSSannouncement• TriggerTWT• Newpowersaveconsiderations• Newfeatures

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