Installation Guide

FinMInstallationGuide DQ0266070/A.01 B‐2
EIRP
Equivalent(orEffective)IsotropicallyRadiatedPower:The
powerthatanantennamustemittoproducethepeak
powerdensityinthedirectionofmaximumantennagain.In
ourcases,thisisusually:SystemTxPower+Antenna
Gain‐CableLoss.
FAA
FederalAviationAdministration.AU.S.federalofficethat
manages aviationregulationsthroughouttheUnitedStates.
GRE
GenericRoutingEncapsulation.Acommunicationprotocol
usedtoestablishadirect,point‐to‐pointconnection
betweennetworknodes.GREletstwopeerssharedatathey
wouldn’tbeabletoshareoverthepublicnetworkitself.
GRETunnel
Avirtualpoint‐to‐pointconnectionbetweentwonetworks,
usingtheGREprotocoltocarrythisout.
HBS HighcapacityBaseStation.SameasaBS
HMU
HighcapacityMobility(subscriber)Unit.SimilartoanHSU,
butcanbemobile.
ISU
IntegratedSynchronizationUnit:anetworkdevicethatpro‐
videsasynchronizationsignaltoundergroundTBSs.
ITHO Intra‐trainhandovermechanism
MDL MultipleDeviceLearning
MIMO
MultipleIn,MultipleOut.Atechniquebywhichthecapacity
ofaradiolinkisincreasedusingmultipletransmittingand
receivingantennas,transmittingadifferentsignalonall
antennas.
MIR MaximumInformationRate
Mobile(HSU)
A“mobile”HSUcanmovefromlocationtolocationandpro‐
videservicewhileitmovesorwhenitisstationary.
ODU
OutdoorUnit:agenerictermforanyradio,andcanusually
beexchangedforHBSorHSU.
On‐board
Itemsorsubjectmatterthatrelatestotheenvironmentonor
insidethetrainitself.Alsocalled“TrainSide”
PNAM PredecessorNeighborAdvertisementMessage
PPPoE Point‐to‐PointProtocoloverEthernet
PtMP PointtoMulti‐Point:linkfromanHBStoseveralHSUs
PtP PointtoPoint
TableB‐1:Terminology(Sheet2of3)
Term Description
FOR REGULATORY REVIEW