Wide band CDMA (WCDMA) technology was selected to for UTRAN air interface. UMTS WCDMA is a Direct Sequence CDMA system where user data is multiplied with quasi-random bits derived from WCDMA spreading codes. In UMTS, in addition to channelisation, codes are used for synchronisation and scrambling. WCDMA has two basic modes of operation: Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
The functions of Node-B are:
The functions of RNC are:
The functions of Node-B are:
The functions of RNC are:
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