WCDMA : Introduction Multiple Access : Direct-Sequence Code Division Multiple Access (3.84Mcps) Frame Duration : 10ms Multi-rate Concept : Variable spreading.

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Presentation transcript:

WCDMA : Introduction Multiple Access : Direct-Sequence Code Division Multiple Access (3.84Mcps) Frame Duration : 10ms Multi-rate Concept : Variable spreading factor and multi-code Service Multiplexing : Multiple services with different quality of service requirements multiplexed on one connection Channels : Transport Channels (Higher Layer) Physical Channels (Physical Layer

WCDMA Packet Channels

WCDMA Packet Scheduling Code Division Scheduling Time Division Scheduling Shared Channel Scheduling User 1 User 2 User 3 Dedicated Channels Bit Rate Time Shared Channels

Multiplexing TFI Transport Block Transport Block TFI Transport Block Transport Ch. 1 Transport Ch. 2 TFCICoding & Multiplexing Physical Control Ch. Physical Data Ch. TRANSMITTER TFCI Decoding Decoding & Demultiplexing Physical Control Ch. Physical Data Ch. RECEIVER TFI Transport Block Error Indication TFI Transport Block Error Indication Transport Block Error Indication

Uplink Multiplexing CRC Attachment Block Concatenation/ Segmentation Channel Coding Radio Frame equalization First Interleaving Radio Frame Segmentation Rate Matching Transport Channel Multiplexing Other transport channels Physical Channel Segmentation Second Interleaving Physical Channel Matching DPDCH1 DPDCH2DPDCH3