Content for TR 38.863 Word version: 18.2.0

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1 Scope p. 8

The present document covers the RF and co-existence aspects of the work item "Solutions for NR to support non-terrestrial networks (NTN)" [2]

The objectives for the study are the following:

Study and specify adjacent channel co-existence scenarios of Non-terrestrial networks (NTN).
Study and specify needed generic RF core requirements for the network and the UE such that adjacent channel co-existence scenarios are met.

2 Reference p. 8

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-213691: "Revised WID: Solutions for NR to support non-terrestrial networks (NTN)".

[3]

ITU-R Radio Regulations: 2020 Edition

[4]

ECC Decision 06(09): "Designation of the bands 1980-2010 MHz and 2170-2200 MHz for use by systems in the Mobile-Satellite Service including those supplemented by a Complementary Ground Component (CGC)", Approved 01 December 2006, Amended 05 September 2007,

[5]

TR 38.811: "Study on New Radio (NR) to support non-terrestrial networks".

[6]

TR 38.821: "Solutions for NR to support Non-Terrestrial Networks (NTN)".

[7]

3GPP RP-152284: "Revised Work Item: Narrowband IoT ".

[8]

TR 36.942: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Frequency (RF) system scenarios".

[9]

TR 45.820: "Cellular system support for ultra-low complexity and low throughput Internet of Things (CIoT)".

[10]

TR 38.901: "Study on channel model for frequencies from 0.5 to 100 GHz".

[11]

Report ITU-R M.2292: "Characteristics of terrestrial IMT-Advanced systems for frequency sharing/interference analyses".

[12]

3GPP RP-200559: "LS on Parameters of terrestrial component of IMT for sharing and compatibility studies in preparation for WRC-23 (below 5 GHz) ".

[13]

ITU-R Annex 4.4 to Document 5D/716-E.

[14]

TR 38.921: "Study on International Mobile Telecommunications (IMT) parameters for 6.425 - 7.025 GHz, 7.025 - 7.125 GHz and 10.0 - 10.5 GHz".

[15]

TR 36.802: "Evolved Universal Terrestrial Radio Access (E-UTRA); NB-IOT; Technical Report for BS and UE radio transmission and reception".

[16]

TS 38.104: "NR; Base Station (BS) radio transmission and reception".

[17]

TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone".

[18]

3GPP R4-2111460: "On the Rx Parameters and Rx Testing Setup for NTN gNB".

[19]

3GPP R4-2108099: "WF on [312] NTN_Solutions_Part1".

[20]

FCC Online Table of Frequency Allocations, 47 C.F.R § 2.106, February 1, 2021.

[21]

FCC Order 03-15: Report and Order and Notice of Proposed Rule Making, January 29, 2003.

[22]

FCC Order 20-48: Order and Authorization, April 19, 2020.

[23]

FCC Code of Federal Regulations.

[24]

SoftBank, Loon LLC, Nokia, Ericsson, "Proposed deployment and system characteristics of HIBS in the working document towards a preliminary draft new Report ITU-R M.[HIBS-CHARACTERISTICS]," ITU WP-5D contribution, Sep. 28, 2020.

[25]

TS 38.181: "NR; Satellite Node conformance testing".

[26]

TS 38.108: "NR; Satellite Node radio transmission and reception".

[27]

3GPP R4-213618: "Moderator's summary of discussion [94e-41-R17-NRNTN-RAN4Spec] ".

[28]

ERC Recommendation 74-01: "Unwanted emissions in the spurious domain".

[29]

Recommendation ITU-R SM.1541-6: "Unwanted emissions in the out-of-band domain".

[30]

Recommendation ITU-R SM.329: "Unwanted emissions in the spurious domain".

[31]

TR 38.817-02: "General aspects for Base Station (BS) Radio Frequency (RF) for NR".

[32]

TR 38.817-01: "General aspects for User Equipment (UE) Radio Frequency (RF) for NR".

[33]

FCC 16-89: REPORT AND ORDER AND FURTHER NOTICE OF PROPOSED RULEMAKING

[34]

FCC 20-159: REPORT AND ORDER

[35]

FCC 20-166: SECOND REPORT AND ORDER IN IB DOCKET NO. 17-95 AND REPORT AND ORDER IN IB DOCKET NO. 18-315 AND FURTHER NOTICE OF PROPOSED RULEMAKING

[36]

ECC Decision(05)01: The use of the band 27.5-29.5 GHz by the Fixed Service and uncoordinated Earth stations of the Fixed-Satellite Service (Earth-to-space)

[37]

ECC Decision(13)01: The harmonised use, free circulation and exemption from individual licensing of Earth Stations On Mobile Platforms (ESOMPs) within the frequency bands 17.3-20.2 GHz and 27.5-30.0 GHz

3 Definition of terms, symbols and abbreviations p. 10

3.1 Terms p. 10

For the purposes of the present document, the terms and definitions 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.

Feeder link:

Wireless link between NTN-Gateway and satellite

Geostationary Earth Orbit:

Circular orbit at 35,786 km above the Earth's equator and following the direction of the Earth's rotation. An object in such an orbit has an orbital period equal to the Earth's rotational period and thus appears motionless, at a fixed position in the sky, to ground observers.

Geosynchronous Orbit:

Earth-centered orbit at approximately 35786 kilometres above Earth's surface and synchronised with Earth's rotation. A geostationary orbit is a non-inclined geosynchronous orbit, i.e. in the Earth's equator plane.

Low Earth Orbit:

Orbit around the Earth with an altitude between 300 km, and 1500 km.

Minimum Elevation angle:

Minimum angle under which the satellite or HAPS can be seen by a UE.

Non-Geostationary Satellites:

Satellites (LEO and MEO) orbiting around the Earth with a period that varies approximately between 1.5 hour and 10 hours. It is necessary to have a constellation of several Non-Geostationary satellites associated with handover mechanisms to ensure a service continuity.

Non-terrestrial networks:

Networks, or segments of networks, using an airborne or space-borne vehicle to embark a transmission equipment relay node or base station.

NTN-Gateway:

An earth station or gateway is located at the surface of Earth, and providing sufficient RF power and RF sensitivity for accessing to the satellite (resp. HAPS).

Satellite:

A space-borne vehicle embarking a bent pipe payload or a regenerative payload telecommunication transmitter, placed into Low-Earth Orbit (LEO), Medium-Earth Orbit (MEO), or Geostationary Earth Orbit (GEO).

Service link:

Radio link between satellite and UE

Transparent payload:

Payload that changes the frequency carrier of the UL/DL RF signal, filters and amplifies it before transmitting it on the DL/UL, respectively.

UE transmission bandwidth configuration:

Set of resource blocks located within the UE channel bandwidth which may be used for transmitting or receiving by the UE.

User Throughput:

data rate provided to a terminal

3.2 Symbols p. 10

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

ΔF_Raster

Band dependent channel raster granularity

ΔF_Global

Granularity of the global frequency raster

ΔF_Raster

Band dependent channel raster granularity

BW_Channel

Channel bandwidth

BW_interferer

Bandwidth of the interferer

F_{DL_low}

The lowest frequency of the downlink operating band

F_{DL_high}

The highest frequency of the downlink operating band

F_{UL_low}

The lowest frequency of the uplink operating band

F_{UL_high}

The highest frequency of the uplink operating band

F_Interferer

Frequency of the interferer

F_Interferer (offset)

Frequency offset of the interferer (between the center frequency of the interferer and the carrier frequency of the carrier measured)

F_Ioffset

Frequency offset of the interferer (between the center frequency of the interferer and the closest edge of the carrier measured)

F_OOB

The boundary between the NR out of band emission and spurious emission domains

F_REF

RF reference frequency

F_REF-Offs

Offset used for calculating FREF

F_uw (offset)

The frequency separation of the center frequency of the carrier closest to the interferer and the center frequency of the interferer

N_RB

Transmission bandwidth configuration, expressed in units of resource blocks

N_REF

NR Absolute Radio Frequency Channel Number (NR-ARFCN)

N_REF-Offs

Offset used for calculating NREF

P_Interferer

Modulated mean power of the interferer

P_uw

Power of an unwanted DL signal

3.3 Abbreviations p. 11

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.

ACLR

Adjacent Channel Leakage Ratio

ACS

Adjacent Channel Selectivity

A-MPR

Additional Maximum Power Reduction

Base Station

Bandwidth

BWP

Bandwidth Part

Carrier Group

CP-OFDM

Cyclic Prefix-OFDM

Continuous Wave

DFT-s-OFDM

Discrete Fourier Transform-spread-OFDM

DM-RS

Demodulation Reference Signal

DTX

Discontinuous Transmission

EIRP

Equivalent Isotropically Radiated Power

EVM

Error Vector Magnitude

Frequency Range

FRC

Fixed Reference Channel

FRF

Frequency Reuse Factor

FSS

Fixed Satellite Services

FWA

Fixed Wireless Access

GEO

Geostationary Earth Orbiting

gNB

next Generation Node B

Gateway

GSCN

Global Synchronization Channel Number

HAPS

High Altitude Platform Station

HIPS

HAPS as IMT Base Stations

IBB

In-band Blocking

IDFT

Inverse Discrete Fourier Transformation

ISL

Inter-Satellite Links

ITU-R

Radiocommunication Sector of the International Telecommunication Union

LEO

Low Earth Orbiting

Mbps

Mega bit per second

MBW

Measurement bandwidth defined for the protected band

MCG

Master Cell Group

MEO

Medium Earth Orbiting

MOP

Maximum Output Power

MPR

Allowed maximum power reduction

Mobile Services

MSD

Maximum Sensitivity Degradation

MSS

Mobile Satellite Services

NGEO

Non-Geostationary Earth Orbiting

New Radio

NR-ARFCN

NR Absolute Radio Frequency Channel Number

Network Signalling

NTN

Non-Terrestrial Network

OCNG

OFDMA Channel Noise Generator

OOB

Out-of-band

P-MPR

Power Management Maximum Power Reduction

PRB

Physical Resource Block

PSCCH

Physical Sidelink Control CHannel

PSSCH

Physical Sidelink Shared CHannel

QAM

Quadrature Amplitude Modulation

RAN

Radio Access Network

Resource Element

REFSENS

Reference Sensitivity

Radio Frequency

RMS

Root Mean Square (value)

RSRP

Reference Signal Receiving Power

Receiver

SAN

Satellite Access Node

Single Carrier

SCG

Secondary Cell Group

SCS

Subcarrier spacing

SEM

Spectrum Emission Mask

SNR

Signal-to-Noise Ratio

SRS

Sounding Reference Symbol

Synchronization Symbol

TAE

Time Alignment Error

TAG

Timing Advance Group

Transmitter

TxD

Tx Diversity

User Equipment

ULFPTx

Uplink Full Power Transmission

4 General aspects p. 12

4.1 Work item objectives p. 12

The Work item objectives are captured in [2].