User`s guide

Plan RF Coverage
RoamAbout Switch Manager User’s Guide 6-23
Compute and Place APs
WhenyouperformtheComputeandPlaceprocedureforoneormorecoverageareas,RASM
automaticallycalculatesthenumberofRoamAboutSwitchesyourequire,andplacesthemin
appropriatelocationsonthefloor.Todothis,twocalculationsareperformedinRASM.Oneis
basedoncapacity(trafficengineering)andthe
otherisbasedonpureRFcoverage(atagivendata
rate).
Afterthecalculationsareperformed,thenumberofAPsfromcapacityandthenumberofAPs
fromcoveragearecompared,andthebiggercount“wins.”Ifcapacitywins,agridpatternofAPs
isestablished.TheAPcoveragepositions
arereused,withtheexcessAPsremainingintheir
originalgridposition.
WhenyouareperformingComputeandPlaceforacoverageareaforthefirsttime,theresultsdo
notaccountforexistingRoamAboutSwitches.ManualoverridesoftheAPresultsarenottaken
intoaccountifyouperformCompute
andPlaceagain.
TodeterminethenumberandplacementofAPs:
1. DisplaythefloorplanintheContentpanel.
2. IntheTaskListpanel,clickRFPlanning.
3. UnderRFPlanning,clickComputeandPlace.TheComputeandPlacewizardappears.
4. ToremoveacoverageareafromAPplacementandcomputation,clearthe
area’sCompute
Layoutbox.
5. Tospecifytheprimarywiringclosetforacoveragearea,clickintheWiringClosetcolumnto
displaythewiringclosetlistandselectawiringclosetfromthelist.
6. ClickNext.TheCoverageAreaProgresspageappears.I nformation isshownaboutthe
numberofAPs
percoveragearea,andwhethertheywereplacedbasedoncoverageor
capacity.
Note: Using a “clean” RF model is imperative for best results. If you have many parallel RF obstacles
that are close together, the placement algorithm tends to add more APs than are required. So, even
with the automatic clean layout mechanism in RASM, complex drawings demand additional pruning
and isolation of single RF obstacles objects to keep the RF obstacle count as low as possible. For
more information about cleaning your floor plans, refer to “Clean Layout” on page 6-9.