Section: 15.5.3 Support for RACH Optimization
Content: RACH optimization is supported by UE reported information made available at the NG RAN node as specified in TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12] and by PRACH parameters exchange between NG RAN nodes. The contents of the RA Report comprise of the following: - Contention detection indication per RACH attempt; - Indexes of the SSBs and number of RACH preambles sent on each tried SSB listed in chronological order of attempts; - Indication whether the selected SSB is above or below the configured RSRP threshold per RACH attempt; - 2-step RACH information as specified in clause 5.7.10.4 of TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12]. SN RA Reports The UE operating in NR-DC, may also support collection of RA Reports by the SN. The RA report retrieval and forwarding in case of NGEN-DC is specified in TS 37.340[ Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2 ]  [21].