Enterasys RoamAbout 3000 Guide de l'utilisateur télécharger pdf (Page 40)

RF Coverage Area

2-4 Planning and Managing Your Wireless Network

RF Planning

TodoRFPlanning,youprovidedetailedinformationaboutyoursiteandbuildingsbyimporting

AutoCADDXF™,AutoCADDWG,JPEG,orGIFfloorplanfilesofthebuildingsintoRASM.As

youimportthefloorplans,youcanmodifythemtoaddorremoveRFobstacles.YoudefineRF

obstaclesby

specifyingtheattenuationfactorindecibelsfortheobstacle.Inaddition,RASM

includesalibraryofattenuatorsforbuildingobstacles.Thelibraryincludesdoors,walls,ceilings,

andotherphysicalobstructionsthatyoucanselect.RASMfactorsintheimpacttheseobjectshave

onhowtheradiofrequency(RF)signalsflow

throughagivensite.

Ifthenetworkcontainsthird‐partyAPsorpre‐ins talledAPs,youcanenterinformationforthese

APssothatRASMtakestheAPsintoaccountwhencalculatingtheplacement(andoptionally,the

channelandpowersettings)oftheEnterasysAPs.

Byusingthistechnique,youreceive

thefollowingbenefits:

•Insteadofyoumakinga“bestguess”astohowmanyAPsyourequireforthedesired

coverageandwhereAPsshouldbeplaced,RASMautomaticallycalculateshowmanyAPs

youneedandwheretoplaceAPsforoptimalpositioning.

•Youcangenerateadeployableworkordertohelp

installersplaceRoamAboutswitchesand

APs.

•Youautomaticallyreceiveadeployableconfigurationthatincludesoptimumpowerand

channelsettings.

•Youenjoymoreaccuratemonitoringoptionsandnetworkvisualizationbasedonthe

additionalgeographicmodellinginformationloadedintoRASM.

Which Planning Method Should I Use?

Themoredetailedyournetworkplan,thebetteryouwillbeabletomanageandmonitorthe

network.However,thereareotherrequirementsthatorganizationsshouldconsider.

WesuggestyouusetheRFAuto‐TuningtechniqueifyouareinstallingAPswithoutconsideration

toblanketcoverage,throughputconcerns,orthenumber

ofusersforwhomservicewillbe

provided.RFAuto‐Tuningisidealforsmallareas;forexample,coveragethatonlyrequiresafew

APs,orwidelydispersedareasinabuilding,suchasconferencerooms.

UsetheRFAuto‐TuningwithModellingtechniqueifyouwanttobettermonitoryour

wireless

networkintermsofbuildings,floors,orcoverageareas.Youmightbeabletolocateinaccurateor

incompletebuildingandfloorplans(perhapsonlyaJPEGfile),butwithevenabitmore

geographicmodellingofyoursite,youboostyourabilitytomanageandvisu alizeyournetwork.

UseRF

PlanningwhenyouwanttouseallthetoolsprovidedinRASMtodeploy,manage,and

monitoryournetwork.Youlikelyhavemultipleconstituenciesofusersyouneedtoconsider;for

example,setsofusersthataremobileandwirelessthathavespecificthroughputandbandwidth

needs.Onegroupof

usersmaybemobileandrequirehighthroughputperformance(ahigher

bandwidth),whileanothergroupofusersaremorestationaryandrequirelessthroughput.

Additionally,youmaybeplanningforfuturecapacity,andneedtoaddasmuchdetailed

informationasyoucanaboutyoursiteinordertoplanfor

thefuture.

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Enterasys RoamAbout 3000 Guide de l'utilisateur Page 40

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