UMTS Network Architecture (Rel'99)

Radio Network Controller(RNC) Functionality

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The UMTS PLMN is logically divided into a Core Network (CN), a Radio Access Network (RAN) and the User Equipment UE.

The Core Network(CN) consists of an enhanced GSM Phase2+ with a Circuit Switched CS and Packet Switched PS (i.e. GPRS) domain The most important network elements of these GSM Phase 2+ CN are:- Mobile Service Switching Center(MSC)- Gateway Mobile Service Switching Center (GMSC)- Visitor Location Register (VLR)- Home Location Register (HLR)- Authentication Center (AuC)- Equipment Identity Register (EIR)- Serving GPRS Support Node (SGSN)- Gateway GPRS Support Node (GGSN)

The RAN of UMTS is the UMTS Terrestrial Radio Access Network (UTRAN) consists of,- Radio Network Controller (RNC), which is controlling a Radio Network Subsystem (RNS)- Node B, which is the physical entity to serve on or several cells

The User Equipment(UE) consists of,- Mobile Equipment (ME), The Mobile Equipment represents the partner of the NodeB and of the RNC. It is responsible for serving the radio interface. Some of the tasks of the Mobile Equipment ares CDMA coding and encoding,Modulation and demodulation on the carrier,Power control,Quality and field strenght measurements,Ciphering and authorization,Mobility management and equipment identification.

- UMTS Subscriber Identity Module (USIM), The USIM functions to save data and procedures in ther terminal equipment. It supports call handling,contains security parameters,user-specific data e.g. telephone directory entries, etc. The installed USIM is made available to the customer by the network operator and can be updated e.g. via SMS or cell broadcasting.Examples of USIM data and procedures,1.Data: International Mobile Subscriber Identity,Packet Switched Location Information,Security Information for authentication and chiphering for circuit and packet switched applications,PLMN selector and HPLMN search

UMTS Network Architecture (Rel'99)

Radio Network Controller(RNC) Functionality

User Equipment UE.

The Core Network(CN) consists of an enhanced GSM Phase2+ with a Circuit Switched CS and Packet Switched PS (i.e. GPRS) domain

The Mobile Equipment represents the partner of the NodeB and of the RNC. It is responsible for serving the radio interface. Some of the tasks of the

encoding,Modulation and demodulation on the carrier,Power control,Quality and field strenght measurements,Ciphering and authorization,Mobility management and equipment

The USIM functions to save data and procedures in ther terminal equipment. It supports call handling,contains security

entries, etc. The installed USIM is made available to the customer by the network operator and can be updated e.g. via SMS or cell broadcasting.

International Mobile Subscriber Identity,Packet Switched Location Information,Security Information for authentication and chiphering for circuit and packet switched