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A PLMN can be regarded as an independent telecommunications entity. ▪ A PLMN is defined as: ▫ One or more switches with: ▫ Switches act as the interface to ▪ a common numbering plan ▪ a common routing plan external networks ▪ The PLMN can be separated into ▫ Core Network ▫ Access Network | UMTS Architecture Overview by Dr Paul Raby Public Land Mobile Network (PLMN) A PLMN can be regarded as an independent telecommunications entity. A PLMN is defined as: One or more switches with: a common numbering plan a common routing plan Switches act as the interface to external networks The PLMN can be separated into Core Network Access Network Core Network Access Network PLMN System Architecture Overview User Equipment UMTS Terrestrial Radio Access Network Core Network UU IU UE UTRAN CN UMTS High Level Architecture System Architecture Overview Major Network Elements in UMTS PLMN, PSTN, ISDN Internet, X25 Packet Network UU UE CU USIM ME Mobile Equipment UMTS SIM CN MSC/VLR SGSN GGSN GMSC HLR Serving GSN Gateway GSN Gateway MSC Mobile Switching Centre Home Location Register IU UTRAN IUb IUr Node B Node B Node B Node B RNC RNC Radio Network Controller Radio Network Controller Iu-ps Iu-cs IUb System Architecture Overview General UTRAN Architecture UU IU UE UTRAN IUb . | UMTS Architecture Overview by Dr Paul Raby Public Land Mobile Network (PLMN) A PLMN can be regarded as an independent telecommunications entity. A PLMN is defined as: One or more switches with: a common numbering plan a common routing plan Switches act as the interface to external networks The PLMN can be separated into Core Network Access Network Core Network Access Network PLMN System Architecture Overview User Equipment UMTS Terrestrial Radio Access Network Core Network UU IU UE UTRAN CN UMTS High Level Architecture System Architecture Overview Major Network Elements in UMTS PLMN, PSTN, ISDN Internet, X25 Packet Network UU UE CU USIM ME Mobile Equipment UMTS SIM CN MSC/VLR SGSN GGSN GMSC HLR Serving GSN Gateway GSN Gateway MSC Mobile Switching Centre Home Location Register IU UTRAN IUb IUr Node B Node B Node B Node B RNC RNC Radio Network Controller Radio Network Controller Iu-ps Iu-cs IUb System Architecture Overview General UTRAN Architecture UU IU UE UTRAN IUb IUr Node B Node B Node B Node B RNC RNC Radio Network Controller Radio Network Controller Iu-ps Iu-cs IUb CN (MSC) CN (SGSN) System Architecture Overview Elements of UTRAN Radio Network Controller Owns and controls radio resources in its domain (BSC in GSM) Service Access Point for all services that UTRAN provides for the CN Note: Service RNC (SRNC) and Drift RNC (DRNC) are subsets Note: Control RNC (CRNC ) whichever RNC is talking to the UE Node B Acts as the radio base station (BTS in GSM) Converts the data flow between the Iub and Uu interfaces System Architecture Overview Major Interfaces in UMTS There are four major new interfaces defined in UMTS Iu The interface between UTRAN and the CN Iur The Interface between different RNCs Iub The interface between the Node B and the RNC Uu The air interface RNC Node-B RNC UE CN Uu Iu Iub Iur System Architecture Overview UMTS Interface Implementation ATM/IP Network RNC Node B Node B Node B MSC RNC SGSN Node B Iub Iu_cs Iu_ps Iur .
