Radwin 2000 - Page 27

RADWIN2000UserManual Release2.8.30 1‐3
Terminology
•HighResolutionBands‐Channelminimumstepis250KHz.appliesto3.475‐3.650GHz
IC,3.4‐3.7GHzETSIandthe3.3‐3.8GHzUniversalband.
•LowResolutionBands‐Channelminimumstepis1MHz.AppliestoFCCregulationsin
the3.650‐3.675GHzband.
• Inthefield,alinktypicallyhasalocalorheadquarterssite.Typically,aserviceprovider
isthelocalorheadquarterssite.Theservicerecipientistheremotesite.
Wherethelinkiscompletelyinternaltoacorporation,thechoiceofthelocaland
remoteisjustamatterofconvenience.
Alinkthen,consistsoftwosites.
• InBroadbandWirelessterminology,thelocalandremotesitesaresometimesreferred
toas“near”and“far”,“HQ”and“remote”andsoon.
Thesitewhichisclosertothenetworkcore(oftenthelocalsite)willbereferredtoas
siteA,andtheoppositesideofthelink,usuallyclosertotheenduser,assiteB.
Thischoiceisapplication‐neutralandwillbeusedthroughoutthemanualbothto
describethesitesandtheirnamesasintheexamples.
• ThelinkisconfiguredandmanagedusingaPC,themanagingcomputerconnectedto
siteA.(Thepreciserequirementsforthemanagingcomputeraresetoutonpage4‐1).
Wewilloccasionallyneedtodistinguishbetweenthesitetowhichthemanaging
computerisco nnected,andthesecondsite,whentheyarenotnecessarilyAorB.The
formerwillbecalledthemanagingsiteandthelatter,theover ‐the‐airsite.Whichis
which,isalwaysdeterminedbythelocationofthemanagingcomputer.
• RADWIN2000supportsthreeconnectionmethodsforthemanagingcomputer:
•Local‐adirectpeertopeerconnectionbetweentheEthernetportsonthemanaging
computerandtheIDUorPoEdevice.Localconnectionisalwaysread‐write.
•Network‐themanagingcomputerandthesiteAIDUorPoEdevicebelongtoaLAN
andcommunicatethrougharouterorswitch
•Over‐the‐air‐themanagingcomputerconnectstositeBviatheairinterface
• ThemanagingcomputermaybeconnectedtothelinkthroughanIDUoraPoEdevice.
Inwhat follows,whereeverwerefertoanIDUitincludesPoEdevicesunlessstatedoth‐
erwise.Typically,ifweneedtorefertoanIDUassuch,wewilluseamodelnamesuch
asIDU‐C.
• Thetermsuplinkanddownlink,originatefromthefieldofSatellitecommunications.In
abackhaulorISPcontext,uplinkisfromtheusertothenetworkanddownlinkisfrom
thenetworktotheuser.