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WCDMA : Introduction

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

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WCDMA : Introduction

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  1. 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

  2. WCDMA Packet Channels

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

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

  5. Uplink Multiplexing CRC Attachment DPDCH1 DPDCH2 DPDCH3 Block Concatenation/ Segmentation Physical Channel Matching Channel Coding Second Interleaving Radio Frame equalization Other transport channels First Interleaving Physical Channel Segmentation Radio Frame Segmentation Transport Channel Multiplexing Rate Matching

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