FinMDeploymentGuide Release4.5.10 3‐1
Chapter3:NetworkGuidelines
3.1ScopeofThisChapter
ThischapterprovidesadescriptionofthetypicalnetworkingtopologyrequiredbyRADWIN's
FiberinMotionTrain‐To‐Groundsolution.
3.2Overview
Includedinthischapterare:
• Ageneralintroductiontothenetworkrequirementsfortracksideandon‐boardnet‐
works,
• Adescriptionoftherequiredrouters'functionalities,
• Adataflowdescription,
• SampleIPandVLANassignmentguidelines,
• Ashortdescriptionoftheupdatemessagesduringhandovers,andhowtherecom‐
mende
dnetworktopologysupportsthesemessages.
ThetypicalnetworkingdescribedinthischapterenablesbroadbandTrain‐To‐Ground
communication,whilemaintainingahandovertimeoflessthan50ms.
3.3WaysideNetwork
TheRADWINFiberinMotionbest‐practicesolutionisbasedonatransparentlayer2
architecture:
• ThebackhaulnetworkisconnectedtotheRadioBaseStations(TBS)deployedalongthe
trackssideviaGbEcopperorfiber,asalayer2basednetwork.
Followtheguidelinescarefully.Anyquestionsorclarificationsshouldbe
addressedtoRADWIN'sProfessionalServicesteamforanofficialresponse.
Priortoprojectrollout,adetailednetworkarchitecture(includingtopologyand
HWtobeused)shouldbesharedwithRADWINforconfirmation.