5G • RAN
PDSCH
Physical Downlink Shared Channel
Main physical downlink channel carrying user data, SIBs, paging messages, and RAR responses.
Technical Explanation
PDSCH delivers high-throughput downlink user payload and higher-layer signaling. It supports modulation up to 256QAM (and 1024QAM in Rel-17) and up to 8 spatial layers. Data blocks are protected with LDPC coding and segmented into code blocks with per-code-block CRC and CBG-based retransmission.
Key Functions
- Carries user plane data traffic with multi-gigabit throughput
- Transmits system information blocks (SIB1, OSI) and paging messages
- Supports multi-user and single-user MIMO with rank up to 8
Specifications
3GPP TS 38.211, TS 38.212, TS 38.214
Interfaces
Uu
Related 5G Concepts
Want to memorize 5G concepts like this one?
Study it with SuperMemo SM-2 spaced repetition flashcards.