GSM AND WCDMA NETWORK

The GSM R10/WCDMA CN 3.0 network is a multi-service network. It accommodates the growing number of interconnections between a variety of networks, both circuit-switched and packetswitched, narrowband and broadband, voice and data, fixed and mobile. For the operator, the GSM/WCDMA network means continuity of services, optimized end user application portfolios and significant cost reductions in transmission, operation and maintenance.

The Core Network of the GSM/WCDMA supports both Circuit Switched and Packet Switched services.

Figure 1-1 illustrates the Layered CS core network architecture with logical nodes and Figure 1-2 the corresponding monolithic core network architecture with monolithic nodes.

The system contains the following components:

·         Base Station System (BSS)

– Base Station (BS)

– Base Station Controller (BSC)

·         WCDMA Radio Access Network (WCDMA RAN)

– Base Station (BS)

– Radio Network Controller (RNC)

·         Core Network (CN)

– Mobile services Switching Center (MSC)

– Mobile services Switching Center (MSC) Server

– Gateway MSC (GMSC)

– Gateway MSC (GMSC) Server

– Visitor Location Register (VLR)

– Home Location Register (HLR)

– Authentication Center (AUC)

– Equipment Identity Register (EIR)

– Short Message Service - Gateway MSC (SMS-GMSC)

– Short Message Service - InterWorking MSC (SMS-IWMSC)

– Serving GPRS Support Node ( SGSN )

– Gateway GPRS Support Node ( GGSN )

– Data Transmission Interworking unit (DTI)

– Flexible Number Register (FNR)

– Media Gateway (MGW)

– Combined MSC Server/Media Gateway

·         Additional items possibly connected

- Mobile Intelligent Network (MIN)

- Billing Gateway (BGW)

- Service Order Gateway (SOG)