铁路数字移动通信系统

Themainrevisionsincludethefollowing：1.InthechapterofGeneralProvisions，thetypesofvoiceanddataservicesarerefinedandtheapplicationprinciplesfor"newtechnology，newmaterials，newtechniquesandnewequipment"aswellastheprovisionsonenergyconservationandenvironmentalprotectionareadded.2.InthechapterofTermsandAbbreviations，theexplanationonthetermof"corenetwork"isaddedandtheabbreviationsusedinthisCodearesortedoutandkeptinlinewiththecurrentrelevanttechnicalstandards，3.Theoriginalterm"networkdesign"isrevisedinto"corenetwork"andtheprovisionsonequipmentconfigurationandredundancydesignofeachsubsystemofthecorenetworkaresupplemented.thedesignprovisionsonequipmentconfigurationandconnectionmoderelatedtothepacketswitcheddomainapplicationsystemareadded.4.Theoriginalchaptername"RadioSystemDesign"isrevisedinto"BaseStationSubsystem"andtheprovisionsontheconfigurationofbasestationcontrollerandtheindoorcoverageareadded.therequirementsonradiocoveragedesignforrailwaysofdifferentlevelsaresupplemented，thecontentsabout"selectionofstationlocation"and"antennapole（tower）"aretransferredtothischapter.5.Thepartof"Interconnection"intheoriginalchapter"NetworkDesign"ischangedintoaseparatechapterandrevisedinto"InterconnectionandInterfaces".TheprovisionsoninternalinterfacesofGSM-RrelatedtodesignaresupplementedandtherequirementsforexternalinterfacesofGSM-Rareimproved，6.Thepartof"NumberingPlan"intheoriginalchapter"NetworkDesign"isrevisedintoaseparatechapternamed"NumberPlanning"andthenumberingprinciplesofGSM-Rarecleared.7.TherequirementsforqualityofserviceareadjustedbyreferencetotheOverallTechnicalRequirementsforRailwayDigitalMobileCommunicationSystem（GSM-R）（TB/T3324）.8.Theoriginalchaptername"UserTerminalConfiguration"isrevisedinto"MobileStation（MS）"，theclassificationofMSisadjustedandtherequirementsfortheconfigurationofhandsetsarerefined.