Tech-invite3GPPspaceIETF RFCsSIP
Quick21222324252627282931323334353637384‑5x

Content for  TR 38.830  Word version:  17.0.0

Top   Top   None   None   Next
0…   4…

 

0  IntroductionWord‑p. 6

In RAN #86 meeting, a new Rel-17 study item on NR coverage enhancements was approved [2]. The objective of this study item is to study potential coverage enhancement solutions for specific scenarios for both FR1 and FR2. The detailed objectives are as follows.
  • The target scenarios and services include
    • Urban (outdoor gNB serving indoor UEs) scenario, and rural scenario (including extreme long distance rural scenario) for FR1
    • Indoor scenario (indoor gNB serving indoor UEs), and urban/suburban scenario (including outdoor gNB serving outdoor UEs and outdoor gNB serving indoor UEs) for FR2.
    • TDD and FDD for FR1.
    • VoIP and eMBB service for FR1.
    • eMBB service as first priority and VoIP as second priority for FR2.
    • LPWA services and scenarios are not included.
  • Identify baseline coverage performance for both DL and UL for the above scenarios and services based on link-level simulation
    • UL channels (including PUSCH and PUCCH) are prioritized for FR1.
    • Both DL and UL channels for FR2.
  • Identify the performance target for coverage enhancement, and study the potential solutions for coverage enhancements for the above scenarios and services
    • The target channels include at least PUSCH/PUCCH
    • Study enhanced solutions, e.g., time domain/frequency domain/DM-RS enhancement (including DM-RS-less transmissions)
    • Study the additional enhanced solutions for FR2 if any
    • Evaluate the performance of the potential solutions based on link level simulation.
Up

1  ScopeWord‑p. 7

The present document captures the results and findings from the study item "New SID on NR coverage enhancement" [2]. The purpose of this TR is to document the baseline coverage performance for both FR1 and FR2 considering the scenarios and services identified in [2], and to document the evaluation and findings of the potential enhancements for the identified scenarios and services.
This activity involves the Radio Access work area of the 3GPP studies and has potential impacts both on the Mobile Equipment and Access Network of the 3GPP systems.
This document is a 'living' document, i.e. it is permanently updated and presented to TSG-RAN meetings.
Up

2  References

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
3GPP RP-193240: "New SID on NR coverage enhancement".
[3]
Report ITU-R M.2412: "Guidelines for evaluation of radio interface technologies for IMT-2020".
Up

3  Definitions of terms, symbols and abbreviations

3.1  Terms

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2  Symbols

For the purposes of the present document, the following symbols apply:

3.3  Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
ACK
Acknowledgement
BWP
Bandwidth Part
BS
Base Station
CSI
Channel State Information
CCE
Control Channel Element
DL
Downlink
DMRS
Dedicated Demodulation Reference Signals
eMBB
enhanced Mobile BroadBand
FDD
Frequency Division Duplex
gNB
NR Node B
HARQ
Hybrid Automatic Repeat reQuest
iBLER
initial BLock Error Rate
LLS
Link Level Simulation
MCS
Modulation and Coding Scheme
NACK
Negative Acknowledgement
OS
OFDM symbol
PDCCH
Physical Downlink Control Channel
PUCCH
Physical Uplink Control Channel
PUSCH
Physical Uplink Shared Channel
PDSCH
Physical Downlink Shared Channel
PRACH
Physical Random Access Channel
PRB
Physical Resource Block
rBLER
residual BLock Error Rate
SCS
Subcarrier Spacing
SLS
System Level Simulation
SR
Scheduling Request
SSB
Synchronization Signal Block
TBS
Transport Block Size
TDD
Time Division Duplex
UCI
Uplink Control Information
UE
User Equipment
UL
Uplink
Up

Up   Top   ToC