Installation Guide

FinMInstallationGuideRev.0.9 Release4.5.25 B‐2
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provides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ca
pacity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provide
servicewhileitmovesorwhenitisstationary.
ODU
OutdoorUnit:agenerictermfo
r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:li nkfromanHBStose
veralHSUs
PtP PointtoPoint
RSS RadioSignalStrength
QoS QualityofService
Sector
AgroupofradiosthatconsistsofoneHBSandseveralHSUsthat
communicatewiththeHBS.
SLA
ServiceLevelAgreement‐thebasicagreementbetweenthe
serviceprovideranditscustomerregardingcertainaspectsofthe
serviceprovided.Forexample,whatsho
uldbethedatarate,
throughput,jitteroftheline,whoshouldpa ywhatfees,themean
timebetweenfailure(MTBF)oftheequipment,andsoforth,
TableB‐1:Terminology(Sheet2of3)
Term Description