3 Definitions of terms, symbols and abbreviations

38.176-13GPPIntegrated Access and Backhaul (IAB) conformance testingNRPart 1: conducted conformance testingRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

3.1 Terms

For the purposes of the present document, the terms given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

aggregated IAB channel bandwidth: the RF bandwidth in which a IAB-DU and/or IAB-MT transmits and receives multiple contiguously aggregated carriers. The aggregated IAB channel bandwidth is measured in MHz

active transmitter unit: transmitter unit which is ON, and has the ability to send modulated data streams that are parallel and distinct to those sent from other transmitter units to one or more IAB type 1-H TAB connectors at the transceiver array boundary

basic limit: emissions limit relating to the power supplied by a single transmitter to a single antenna transmission line in ITU-R SM.329 [5] used for the formulation of unwanted emission requirements for FR1

beam: beam (of the antenna) is the main lobe of the radiation pattern of an antenna array

NOTE: For certain antenna array, there may be more than one beam.

Channel edge: lowest or highest frequency of the NR carrier, separated by the IAB-MT channel bandwidth or IAB-DU channel bandwidth.

Carrier aggregation: aggregation of two or more component carriers in order to support wider transmission bandwidths

Carrier aggregation configuration: a set of one or more operating bands across which the IAB-DU or IAB-MT aggregates carriers with a specific set of technical requirements

co-location reference antenna: a passive antenna used as reference for co-location requirements

Contiguous spectrum: spectrum consisting of a contiguous block of spectrum with no sub-block gap(s).

fractional bandwidth: fractional bandwidth FBW is defined as

highest carrier: The carrier with the highest carrier frequency transmitted/received in a specified frequency band.

IAB-donor: gNB that provides network access to UEs via a network of backhaul and access links.

IAB-DU channel bandwidth: RF bandwidth supporting a single IAB-DU RF carrier with the transmission bandwidth configured in the uplink or downlink

NOTE 1: The IAB-DU channel bandwidth is measured in MHz and is used as a reference for transmitter and receiver RF requirements.

NOTE 2: It is possible for the IAB to transmit to and/or receive from one or more UE bandwidth parts that are smaller than or equal to the IAB transmission bandwidth configuration, in any part of the IAB transmission bandwidth configuration.

IAB-DU RF Bandwidth: RF bandwidth in which an IAB-DU transmits and/or receives single or multiple carrier(s) within a supported operating band

IAB-DU RF Bandwidth edge: frequency of one of the edges of the IAB-DU RF Bandwidth.

IAB-MT channel bandwidth: RF bandwidth supporting a single IAB-MT RF carrier with the transmission bandwidth configured in the uplink or downlink

NOTE 1: The IAB-MT channel bandwidth is measured in MHz and is used as a reference for transmitter and receiver RF requirements.

IAB-MT RF Bandwidth: RF bandwidth in which an IAB-MT transmits and/or receives single or multiple carrier(s) within a supported operating band

NOTE: In single carrier operation, the IAB-MT RF Bandwidth is equal to the IAB-MT channel bandwidth.

IAB-MT RF Bandwidth edge: frequency of one of the edges of the IAB-MT RF Bandwidth.

IAB RF Bandwidth: RF bandwidth in which an IAB-DU and/or IAB-MT transmits and/or receives single or multiple carrier(s) within a supported operating band

IAB RF Bandwidth edge: frequency of one of the edges of the IAB RF Bandwidth.

IAB Simultaneous Operation: IAB-DU and IAB-MT operating with simultaneous transmission, or simultaneous reception.

IAB type 1-H: IAB-DU or IAB-MT operating at FR1 with a requirement set consisting of conducted requirements defined at individual TAB connectors and OTA requirements defined at RIB

IAB type 1-O: IAB-DU or IAB-MT operating at FR1 with a requirement set consisting only of OTA requirements defined at the RIB

IAB type 2-O: IAB-DU or IAB-MT operating at FR2 with a requirement set consisting only of OTA requirements defined at the RIB

inter-band gap: The frequency gap between two supported consecutive operating bands.

Inter RF Bandwidth gap: frequency gap between two consecutive IAB-DU and/or IAB-MT RF Bandwidths that are placed within two supported operating bands

lowest Carrier: The carrier with the lowest carrier frequency transmitted/received in a specified frequency band.

maximum carrier output power: mean power level measured per carrier at the indicated interface, during the transmitter ON period in a specified reference condition

measurement bandwidth: RF bandwidth in which an emission level is specified

multi-band connector: TAB connector of IAB type 1-H associated with a transmitter or receiver that is characterized by the ability to process two or more carriers in common active RF components simultaneously, where at least one carrier is configured at a different operating band than the other carrier(s) and where this different operating band is not a sub-band or superseding-band of another supported operating band

multi-band RIB: operating band specific RIB associated with a transmitter or receiver that is characterized by the ability to process two or more carriers in common active RF components simultaneously, where at least one carrier is configured at a different operating band than the other carrier(s) and where this different operating band is not a sub-band or superseding-band of another supported operating band

Non-contiguous spectrum: spectrum consisting of two or more sub-blocks separated by sub-block gap(s).

operating band: frequency range in which NR operates (paired or unpaired), that is defined with a specific set of technical requirements

NOTE: The operating band(s) for an IAB-DU and IAB-MT are declared by the manufacturer

Parent node: IAB-MT’s next hop neighbour node; the parent node can be IAB-node or IAB-donor.

Radio Bandwidth: frequency difference between the upper edge of the highest used carrier and the lower edge of the lowest used carrier

rated carrier output power: mean power level associated with a particular carrier the manufacturer has declared to be available at the indicated interface, during the transmitter ON period in a specified reference condition

rated total output power: mean power level associated with a particular operating band the manufacturer has declared to be available at the indicated interface, during the transmitter ON period in a specified reference condition

requirement set: one of the NR requirement sets as defined for IAB type 1-H, IAB type 1-O, and IAB type 2-O

single-band connector: IAB type 1-H TAB connector supporting operation either in a single operating band only, or in multiple operating bands but does not meet the conditions for a multi-band connector.

sub-band: A sub-band of an operating band contains a part of the uplink and downlink frequency range of the operating band.

sub-block: one contiguous allocated block of spectrum for transmission and reception by the same IAB-DU or IAB-MT

NOTE: There may be multiple instances of sub-blocks within a IAB RF Bandwidth.

sub-block gap: frequency gap between two consecutive sub-blocks within a IAB RF Bandwidth, where the RF requirements in the gap are based on co-existence for un-coordinated operation

superseding-band: A superseding-band of an operating band includes the whole of the uplink and downlink frequency range of the operating band.

TAB connector: transceiver array boundary connector

TAB connector RX min cell group: operating band specific declared group of TAB connectors to which IAB type 1-H conducted RX requirements are applied

NOTE: Within this definition, the group corresponds to the group of TAB connectors which are responsible for receiving a cell when the IAB type 1-H setting corresponding to the declared minimum number of cells with reception on all TAB connectors supporting an operating band, but its existence is not limited to that condition

TAB connector TX min cell group: operating band specific declared group of TAB connectors to which IAB type 1-H conducted TX requirements are applied.

NOTE: Within this definition, the group corresponds to the group of TAB connectors which are responsible for transmitting a cell when the IAB type 1-H setting corresponding to the declared minimum number of cells with transmission on all TAB connectors supporting an operating band, but its existence is not limited to that condition

transceiver array boundary: conducted interface between the transceiver unit array and the composite antenna

transmission bandwidth: RF Bandwidth of an instantaneous transmission from an IAB-DU or IAB-MT, measured in resource block units

transmitter OFF period: time period during which the IAB-DU or IAB-MT transmitter is not allowed to transmit

transmitter ON period: time period during which the IAB-DU or IAB-MT transmitter is transmitting data and/or reference symbols

transmitter transient period: time period during which the transmitter is changing from the OFF period to the ON period or vice versa

3.2 Symbols

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

 Percentage of the mean transmitted power emitted outside the occupied bandwidth on the assigned channel

BW_Channel IAB-DU channel bandwidth or IAB-MT channel bandwidth

BW_{Channel_CA} aggregated IAB channel bandwidth, expressed in MHz. BW_{Channel_CA}= F_{edge_high}– F_{edge_low.}

BW_Config Transmission bandwidth configuration, expressed in MHz, where BW_Config = N_RB x SCS x 12 kHz

BW_tot Total RF bandwidth

Δf Separation between the channel edge frequency and the nominal -3 dB point of the measuring filter closest to the carrier frequency

Δf_max f_offset_max minus half of the bandwidth of the measuring filter

Δf_OBUE Maximum offset of the operating band unwanted emissions mask from the downlink operating band edge

Δf_OOBMaximum offset of the out-of-band boundary from the uplink operating band edge

F_CRF reference frequency on the channel raster

F_{C,block, high}Fc of the highest transmitted/received carrier in a sub-block

F_{C,block, low}Fc of the lowest transmitted/received carrier in a sub-block

F_{C_low} The Fc of the lowest carrier, expressed in MHz

F_{C_high} The Fc of the highest carrier, expressed in MHz

F_{edge_low} The lower edge of aggregated IAB channel bandwidth, expressed in MHz. F_{edge_low}= F_{C_low}– F_{offset_low}

F_{edge_high} The upper edge of aggregated IAB channel bandwidth, expressed in MHz. F_{edge_high}= F_{C_high}+ F_{offset_high.}

F_{offset_high} Frequency offset from F_{C_high} to the upper Base Station RF Bandwidth edge, or from F_{C,block, high}to the upper sub-block edge

F_{offset_low} Frequency offset from F_{C_low} to the lower Base Station RF Bandwidth edge, or from F_{C,block, low}to the lower sub-block edge

F_{DL_low}The lowest frequency of the downlink operating band

F_{DL_high}The highest frequency of the downlink operating band

f_offset Separation between the channel edge frequency and the centre of the measuring filter

f_offset_maxThe offset to the frequency Δf_OBUE outside the downlink operating band

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

Iuant gNB internal logical interface between the implementation specific O&M function and the RET antennas and TMAs control unit function of the gNB

N_cellsThe declared number corresponding to the minimum number of cells that can be transmitted by an IAB type 1-H in a particular operating band

N_RB Transmission bandwidth configuration, expressed in resource blocks

N_RXU,active The number of active receiver units. The same as the number of demodulation branches to which compliance is declared for clause 8 performance requirements

N_RXU,counted The number of active receiver units that are taken into account for conducted Rx spurious emission scaling, as calculated in clause 7.6.1

N_{RXU,countedpercell} The number of active receiver units that are taken into account for conducted RX spurious emissions scaling per cell, as calculated in clause 7.6.1

N_TXU,counted The number of active transmitter units as calculated in clause 6.1, that are taken into account for conducted TX output power limit in clause 6.2.1, and for unwanted TX emissions scaling

N_{TXU,countedpercell} The number of active transmitter units that are taken into account for conducted TX emissions scaling per cell, as calculated in clause 6.1

P_max,c,TABCThe maximum carrier output power per TAB connector

P_rated,c,sys The sum of P_rated,c,TABC for all TAB connectors for a single carrier

P_rated,c,TABCThe rated carrier output power per TAB connector

P_rated,t,TABCThe rated total output power declared at TAB connector

P_REFSENS Conducted Reference Sensitivity power level

W_gap Sub-block gap or Inter RF Bandwidth gap size

3.3 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

ACLR Adjacent Channel Leakage Ratio

ACS Adjacent Channel Selectivity

AWGN Additive White Gaussian Noise

BS Base Station

BW Bandwidth

CA Carrier Aggregation

CACLR Cumulative ACLR

CP-OFDM Cyclic Prefix-OFDM

CW Continuous Wave

DFT-s-OFDM Discrete Fourier Transform-spread-OFDM

DM-RS Demodulation Reference Signal

E-UTRA Evolved UTRA

EVM Error Vector Magnitude

FDD Frequency Division Duplex

FR Frequency Range

GSM Global System for Mobile communications

ITU‑R Radiocommunication Sector of the International Telecommunication Union

IAB Integrated Access and Backhaul

IAB-DU IAB Distribution Unit

IAB-MT IAB Mobile Termination

ICS In-Channel Selectivity

LA Local Area

MR Medium Range

NB-IoT Narrowband – Internet of Things

NR New Radio

NR-ARFCN NR Absolute Radio Frequency Channel Number

OBUE Operating Band Unwanted Emissions

OCC Orthogonal Covering Code

OTA Over The Air

RB Resource Block

RDN Radio Distribution Network

REFSENS Reference Sensitivity

RF Radio Frequency

RIB Radiated Interface Boundary

RMS Root Mean Square (value)

RS Reference Signal

RX Receiver

SCS Sub-Carrier Spacing

SDL Supplementary Downlink

SSB Synchronization Signal Block

SUL Supplementary Uplink

TAB Transceiver Array Boundary

TAE Time Alignment Error

TDD Time division Duplex

TX Transmitter

TT Test Tolerance

UCI Uplink Control Information

WA Wide Area

ZF Zero Forcing