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Content for  TR 37.880  Word version:  17.0.0

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1  ScopeWord‑p. 6

The present document captures the findings from the study item "Study on High-power UE operation for fixed-wireless/vehicle-mounted use cases in Band 12, Band 5, and Band n71".

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-201261: "New SID on high-power UE operation for fixed-wireless/vehicle-mounted use cases in Band 12, Band 5, and Band n71", U.S. Cellular.
[3]
TR 36.837: "Public safety broadband high power User Equipment (UE)".
[4]
TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone".
[5]
3GPP R4-2008924: "LS on Parameters of terrestrial component of IMT for sharing and compatibility studies in preparation for WRC-23 (below 5 GHz)", Ericsson.
[6]
TR 36.802: "Evolved Universal Terrestrial Radio Access (E-UTRA); NB-IOT; Technical Report for BS and UE radio transmission and reception".
[7]
TR 36.942: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Frequency (RF) system scenarios".
[8]
TS 36.101: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception".
[9]
3GPP R4-78AH-0150, "Summary of in-band/guard-band interference modeling from various companies", Intel, Huawei, Ericsson, ZTE, Nokia Networks.
[10]
3GPP R4-163556, "Simulation results of coexistence studies between NB-IoT and LTE, guard-band case", Intel Corporation.
[11]
R4-124522, Architecture of Power Class 1 UE in Band 14, RAN4#64, EADS / Cassidian
[12]
R4-1702437, MPR/A-MPR requirement for PC1 HPUE
[13]
3GPP R4-163555, "Simulation results of coexistence studies between NB-IoT and LTE, in-band case", Intel Corporation.
[14]
TR 37.806: "Extending 850 MHz study Technical Report".
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3  Definitions of terms, symbols and abbreviationsWord‑p. 7

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:
CLx-ile
x-percentile CL value
Pmax
UE maximum transmit power
Pt
UE transmit power
Rmin
Minimum power reduction ratio

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.
3GPP
3rd Generation Partnership Project
ACLR
Adjacent Channel Leakage Ratio
A-MPR
Additional Maximum Power Reduction
BB
Base Band
BS
Base Station
BW
Bandwidth
CL
Coupling Loss
DL
Downlink
HPUE
High Power User Equipment
IF
Intermediate Frequency
ITU
International Telecommunication Union
LTE
Long Term Evolution
MOP
Maximum Output Power
MPR
Allowed Maximum Power Reduction
MTC
Machine-Type Communications
NB-IoT
Narrowband - Internet of Things
NB
Narrowband
NR
New Radio
OOBE
Out Of Band Emissions
PA
Power Amplifier
PC
Power Class
PRB
Physical Resource Block
PSNB
Public Safety Narrowband
RAN4
Radio Access Network Working Group 4
REFSENS
Reference Sensitivity
RF
Radio Frequency
Rx
Receiver
SW
Software
TR
Technical Report
Tx
Transmitter
UE
User Equipment
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4  BackgroundWord‑p. 8

4.1  Justification

Support for fixed wireless and vehicle mounted user equipment usage scenarios, with broader rural coverage and higher data rates is envisioned as part of deployment configurations in LTE band 12 and band 5, and in NR band n71. Improvements in coverage, availability, and throughput performance to meet the market demands associated with fixed wireless and vehicle mounted usage would be enabled with user equipment specified with a power class 1 (31dBm) up-link transmission capability.
The fixed wireless access scenario provides a variety of benefits consisting of rapid deployment, and a reduction of costs associated with the transport to a customer premise, relative to wireline types of transport. The enablement of fixed wireless user equipment provides backhauling services to an appropriate base station in a serving network, for any other equipment at the customer premise. Similarly, vehicle mounted access scenario provides both direct access to other devices and indirect access to other devices, via the network.
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4.2  Objective

The objective is to study RF requirements that are applicable for high power UE operation in LTE band 12 and band 5, and in NR band n71 for fixed wireless and vehicle-mounted use cases, in ITU Region 2.
a.
Since the OOBE (Out Of Band Emissions) from the Band 12, Band 5, and Band n71 for high power user equipment (Power Class 1) into a neighbouring band is higher than Power class 3, co-existence studies are anticipated to evaluate the throughput OOBE impact on a victim band, from a high power aggressor in Band 12, Band 5, and Band n71.
  1. Coexistence studies for B5 to include at a minimum the impact on the B26 DL and the public safety downlink in 851-861 MHz.
  2. Coexistence studies for B5 include at a minimum the impact to the B5/n5/B26/n26 uplink including LTE, NR and MTC1 and 2, NB1 and 2 including the A* and B* blocks of the US cellular band configuration as well as the public safety uplink in 806-816 MHz.
  3. Coexistence studies for B12 to include at a minimum the impact to the B29 DL.
  4. Coexistence studies for B12 to include at a minimum the impact to the B12/n12/B71/n71/B85 uplink including LTE, NR and MTC1 and 2, NB1 and 2.
  5. Coexistence studies for n71 to include at a minimum the impact to the B12/n12/B71/n71/B85 uplink including LTE, NR and MTC1 and 2, NB1 and 2.
  6. Coexistence with B66.
b.
Considerations for high power UE operation in Band 12, Band 5, and n71:
  1. B12 UE Tx 3rd harmonic falls into B4 UE Rx band - will require more filters on Tx path if Carrier Aggregation is used:
    • Harmonic exceptions are usually granted, but harmonics from PC1 could be much higher.
  2. B5 UE Tx 3rd harmonic falls into 2.4GHz band - may need more filters on Tx path:
    • Harmonic exceptions are usually granted, but harmonics from PC1 could be much higher.
  3. n71 UE Tx 3rd harmonic falls into 3GPP victim bands - may need more filters on Tx path:
    • Harmonic exceptions are usually granted, but harmonics from PC1 could be much higher.
  4. B5/n5/B26/n26/B27 eNB Rx blocking from UE Tx power in B5.
  5. B85/B12/n12/B17/B66/n66/B71/n71 eNB Rx blocking from UE Tx power in B12.
  6. B85/B12/n12/B17/B2/n2/B25/n25/B71/n71 eNB Rx blocking from UE Tx power in n71.
  7. Self-desense of B5, B12, and n71 Rx due to PC1 UL Tx power.
c.
Considerations in terms of high power user equipment hardware in Band 12, Band 5, and n71:
  1. Identify all new RF components needed for B12, B5, and n71, including Power Amplifier, large ceramic duplex filter, switches, possibly antenna tuner.
  2. New components will be much larger and produce more heat.
  3. Battery power most likely not an option - will need power supply due to high PA current.
  4. Modem SW changes needed to support broader power control range, headroom reporting, and higher output power.
d.
UE requirements.
The scope of these considered requirements in Table 4.2-1 is limited to fixed wireless and vehicle-mounted broadband applications.
Requirement LTE Band 12 LTE Band 5 NR Band n71
UE Output Power (dBm)+31dBm +2/-3dB+31dBm +2/-3dB+31dBm +2/-3dB
3GPP 36.101 [8] clause 6 Transmitter requirementsExisting Power Class 1 specificationExisting Power Class 1 specificationExisting Power Class 1 specification
3GPP 36.101 clause 7 Receiver requirementsExisting Power Class 1 specificationExisting Power Class 1 specificationExisting Power Class 1 specification
 
High power user equipment (power class 1) would require a different RF specification relative to the typical handheld (power class 3) user equipment. The proposal is to study relevant requirements for high power user equipment operation in Band 12, Band 5, and n71, using a framework similar to that specified for high power user equipment operation in Band 14 (700MHz spectrum) in ITU Region 2. These requirements will be captured in the present document.
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