How are TCI States linked to CSI-RS Resources in commercial networks?

RAN
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1

Hi Experts,

Do you have a document/reference on how Nokia/Ericsson using the TCI states and how they are linked with csirs resources?

Need to understand how commercially NZP and IM are utilized.

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2

It is well explained here:

3

Vendor specifics are in CPI/ALEX (Ericsson) and NOLS (Nokia) — not public. The mechanism itself is 3GPP: TS 38.331 (TCI-State, NZP-CSI-RS-Resource, CSI-IM-Resource, CSI-ResourceConfig IEs) and TS 38.214 §5.1.6.1 / §5.2.

A TCI state carries QCL info pointing at a source RS (SSB or NZP CSI-RS) — TypeD is the beam. CSI-ResourceConfig pairs an NZP set (channel) with a CSI-IM set (interference); UE derives CQI/PMI/RI from both.

Which vendor and release are you on, and is it mMIMO or classical? Send the relevant MO pages from your library and I’ll give you the exact parameter mapping.