5G • RAN
QCL Type D
Quasi-Co-Location Type D (Spatial Rx Parameter)
Spatial QCL assumption instructing the UE to receive the channel using the exact same spatial RX analog beam.
Technical Explanation
QCL Type D is the critical beamforming parameter in FR2 millimeter-wave. It informs the UE that the target channel (PDCCH or PDSCH) is transmitted with the same spatial characteristics as a source reference signal (SSB or CSI-RS). The UE applies the identical analog spatial receive filter (beam) that was used to receive the source signal.
Key Functions
- Informs UE to apply identical spatial receive antenna beam
- Mandatory for beamforming operation in millimeter wave (FR2)
- Links PDSCH/PDCCH beams directly to measured SSB/CSI-RS beam angles
Specifications
3GPP TS 38.214
Interfaces
Uu
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