The composition of the C3G project experimental system. The entire system consists of 3G switches (UMSC), base station controllers (RNC), base station subsystems (Node B) and mobile terminals. The basic functions of each part are described as follows. 1. Mobile switching subsystem 2. Base station controller subsystem 3. Base station subsystem 4. Mobile terminal subsystem The C3G project demonstration services include basic voice services, circuit-based data services and packet-based data services, including: AMR/QCELP/EVRC voice services; 64kbit/s circuit-based real-time multimedia services based on MPEG4; Packet data online browsing services with a peak rate of 384kbit/s/144bkps; Packet data RealPlayer multimedia service transmission services with a peak rate of 384kbit/s/144bkps.
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