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TR 38.824RAN1
Study on
Physical Layer enhancements for
5G New Radio Ultra-Reliable and Low Latency Case (URLLC)

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V16.0.0 (Wzip)  2019/03  78 p.

WI Acronym:  FS_NR_L1enh_URLLC
Rapporteur:  Miss Cheng, YanHuawei Technologies Co. Ltd.

In Release 15 the basic support for URLLC was introduced with TTI structures for low latency as well as methods for improved reliability. Further use cases with tighter requirements have been identified as important for NR evolution, in addition to the need for enhancing the Release 15 enabled use cases.
The follow key use cases were identified to be considered:
  • Release 15 enabled use case improvements
  • Such as AR/VR (Entertainment industry)
  • New Release 16 use cases with higher requirements
  • Factory automation
  • Transport Industry, including the remote driving use case
  • Electrical Power Distribution
The objective of this study item is to investigate enhancements to URLLC (Ultra Reliable Low Latency Communications), considering both FR1 and FR2 as well as TDD and FDD, with the already existing solutions for NR as the baseline. The TR reports the results and findings from the study item, mainly on baseline performance achievable with Rel-15 NR URLLC, layer 1 enhancements (including PDCCH enhancements, UCI enhancements, PUSCH enhancements and enhancements to scheduling/HARQ/CSI processing timeline), UL inter UE Tx prioritization/multiplexing and enhanced UL configured grant (grant free) transmissions.

full Table of Contents for  TR 38.824  Word version:   16.0.0

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1  ScopeWord-p. 6
2  References
3  Definitions, symbols and abbreviations
4  Introduction
5  Baseline performance achievable with Rel-15 NR URLLCWord-p. 8
6  Layer 1 enhancementsWord-p. 19
7  UL inter UE Tx prioritization/multiplexingWord-p. 43
8  Enhanced UL configured grant (grant free) transmissions
9  Conclusion and recommendation
A  Requirements and simulation assumptionsWord-p. 62
B  Change historyWord-p. 78

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