Radwin 5000 HPMP - Terminology

RADWIN5000HPMPUserManual Release3.5.70 1‐3
Terminology
Terminology
• APointtoMultipointnetworkistypicallyabbreviatedtoPtMP.ThePtMPnetworks
describedinthisManualareofcourse,radiolinks.
• APtMPlinkconsistsofatleastoneBaseStation(BS)radiolinkedtoseveralSubscriber
Unit(SU)radios.TheSUsaresometimescalledCustomerPremisesEquipment(CPEs).
Theterminologycomesfromthefieldoftelephony.
• TheRADWIN5000HPMPproductsuiteprovidesthehighestcapacityandspectrumeffi‐
ciencyavailableinthePointtoMultipointsub‐6GHzband.Wedistinguishbetween
genericBSsandSU sandRADWINunits,relabelingtheformertoHBSandthelatterto
HSUs(H=highcapacity).
• TheradiolinksareeffectedbyusingasectorantennawiththeHBS.TheHSUsusedirec‐
tionalantennasalignedtotheHBS.
• ASectorconsistsofaHBSandagroupofHSUswithintheangularsectorcoveredbythe
HBSantenna.ASectoristypically60°,90°or120°dependingonthechoiceofantenna.
• HBSsmaybecollocatedtoprovidesectorialcoverageupto360°.
TheRFcharacteristicsofaSectorwillbecommontoeachradio:Frequency(regulation),
bandandchannelbandwidth.AdjacentSectorsinaPtMPnetworkwilltypicallyuse
differentfrequenciesandnon‐overlappingbandstomitigateHBSselfinterference.
• AHSUmaybedefinedasfixed,nomadicormobile.
• AfixedHSUisjustthat‐installedatafixedlocation.
• AnomadicHSUisattachedtoa vehiclethatmovesaboutwithinasectorandacr osssec‐
torsinsideawelldefinedarea.Serviceisprovidedwhenthevehicleisstationary.
• AmobileHSU(HMU)providesservicewhilethevehicletowhichitisattachedismoving
orstationary.Thevehicleistypicallyarailwaycarriage,acar(automobile)oraship.A
classofHMUs,VehicularMobileUnits(VMU)provideWiFiserviceandincludeaninte‐
gratedGPSunit.
• DownlinktrafficisdatatransferfromanHBStoanHSU.
•UplinktrafficisdatatransferfromanHSUtoanHBS.
•TimeslotsareassignedtoeachHSUtoprioritiz ethem.63timeslotsareavailablein
eachoftheuplinkanddownlinkdire ctions.
• ForeachfixedornomadicHSU,Assuredthroughputisdeterminedbytheactualnum‐
beroftimeslotsallocatedtoitineitherdirection.Peakthroughput(higherthan
Assuredthroughput)maybeachievedbyallocatingunuseddownlinktimeslotsorunal‐
locateduplinktimeslotstoverybusyHSUs.ThisprocessiscalledSmartBandwidth
Management(SBM).SBMtakesuponetimeslotineachdirection.