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TR 38.891
UE further enhancements of NR RF requirements for frequency range 2 (FR2) for Rel-18

V18.1.0 (Wzip)  2024/03  … p.
Miss Zhang, Juan
Beijing Xiaomi Mobile Software

full Table of Contents for  TR 38.891  Word version:  18.0.0

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1  Scopep. 7

The present document captures finding of the study on FR2 UL 256QAM and beam correspondence for RRC_INACTIVE and initial access. The purpose of this TR is to study the performance gain and implementation aspects for FR2 UL 256QAM and to ensure good UE RACH msg1 performance and UL coverage in FR2 deployments by specifying the beam correspondence requirements for RRC_INACTIVE and initial access as defined in Work Item "NR RF requirements enhancement for frequency range 2 (FR2), Phase 3" [2].

2  Referencesp. 7

3  Definitions of terms, symbols and abbreviationsp. 7

3.1  Termsp. 7

3.2  Symbolsp. 7

3.3  Abbreviationsp. 8

4  Backgroundp. 8

At the 3GPP RAN #95 meeting, the Work Item on "NR RF requirements enhancement for frequency range 2 (FR2), Phase 3" was approved for Rel-18. The objectives of the core part in the Work Item are as follows:
  • Investigate and enable UL 256QAM for FR2-1 [RAN4]
  • Study the gain, operating SNR, phase noise model and implementation aspects
  • Specify the UE RF requirements
  • First priority: Targeted power classes are PC1, PC2 and PC5
  • Second priority: Targeted power class is PC3
Beam correspondence requirements for RRC_INACTIVE and initial access
  • Specify UE beam correspondence requirements for initial access and RRC_INACTIVE state, for SSB-based beam correspondence without UL beam sweeping [RAN4 RF]
  • For RRC_INACTIVE specify at least requirements for Random Access SDT and Configured Grant SDT
  • Requirements for other transmission within RRC_INACTIVE state are not precluded.
  • For initial access, specify requirements and verification of beam correspondence requirements based on msg1 spherical coverage (at least)
Study the potential impact on testability aspects (i.e., test time).
This TR aims to study the objectives and further capture the impact on the specification if applicable.

5  Study for FR2 UL 256QAMp. 8

5.1  Generalp. 8

5.2  Simulationp. 9

5.2.1  System level simulationp. 9

5.2.2  Link level simulationp. 36

5.2.3  Phase noise profiles evaluationp. 87

5.2.4  MPR simulationp. 104

5.2.5  Simulation for PTRS configurationsp. 143

5.3  EVM testp. 163

5.4  Implementation impact for UEp. 164

5.5  Specification impactp. 164

5.6  Conclusionp. 164

6  Study for beam correspondencep. 168

$  Change historyp. 172

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