3 Definitions, symbols and abbreviations
37.1143GPPActive Antenna System (AAS) Base Station (BS) Electromagnetic Compatibility (EMC)Release 17TS
3.1 Definitions
For the purposes of the present document, the terms and definitions given in TR 21.905 [1], TS 37.113 [4] 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 [1] or TS 37.113 [4].
NOTE: Multi-word definitions are treated as linguistic expressions and printed in italic font throughout this requirement specification. Linguistic expressions may not be split and are printed in their entirety.
active antenna system base station: BS system which combines an antenna array with a transceiver unit array and a radio distribution network.
antenna array: group of radiating elements characterized by the geometry and the properties of the array elements.
antenna port: RF interface at the transceiver array boundary, specifically the TAB connectors.
BS type 1-H: NR base station operating at FR1 with a requirement set consisting of conducted requirements defined at individual TAB connectors and OTA requirements defined at RIB.
BS type 1-O: NR base station operating at FR1 with a requirement set consisting only of OTA requirements defined at the RIB.
hybrid AAS BS: AAS BS which has both a conducted RF interface and a radiated RF interface in the far field and conforms to a hybrid requirements set.
MSR operation: operation of AAS BS declared to be MSR in particular operating band(s) (including any of UTRA, E-UTRA and/or NR operation as single RAT or multi-RAT based on TS 37.104 [33]).
NB-IoT In-band operation: NB-IoT is operating in-band when it utilizes the resource block(s) within a normal E-UTRA carrier.
NB-IoT guard band operation: NB-IoT is operating in guard band when it utilizes the unused resource block(s) within an E-UTRA carrier’s guard-band.
NB-IoT standalone operation: NB-IoT is operating standalone when it utilizes its own spectrum, for example the spectrum currently being used by GERAN systems as a replacement of one or more GSM carriers, as well as scattered spectrum for potential IoT deployment.
OTA AAS BS: AAS BS which has ≥8 transceiver units for E-UTRA or MSR and ≥4 transceiver units for UTRA per cell and has a radiated RF interface only and conforms to the OTA requirements set.
OTA requirements set: complete set of OTA requirements applied to an OTA AAS BS.
port: particular interface of EUT used for EMC requirements testing purposes.
NOTE: Any connection point on EUT intended for connection of cables to or from EUT during the EMC testing is considered as a port.
EXAMPLE 1: Examples of ports for hybrid AAS BS are as presented in figure 3.1‑1:
Figure 3.1-1: Examples of ports for hybrid AAS BS
EXAMPLE 2: Examples of ports for OTA AAS BS (i.e. with no antenna ports) are as presented in figure 3.1-2:
Figure 3.1-2: Examples of ports for OTA AAS BS
radiated interface boundary: operating band specific radiated requirements reference where the radiated requirements apply.
radio distribution network: linear passive network which distributes the RF power generated by the transceiver unit array to the antenna array, and/or distributes the radio signals collected by the antenna array to the transceiver unit array.
NOTE: In the case when the active transceiver units are physically integrated with the array elements of the antenna array, the radio distribution network is a one-to-one mapping.
single RAT E-UTRA operation: operation of AAS BS declared to be single RAT E-UTRA in the operating band.
NOTE: Single RAT E-UTRA operation does not cover in-band NB-IoT, nor guardband NB-IoT operation.
single RAT UTRA operation: operation of AAS BS declared to be single RAT UTRA in the operating band.
spatial exclusion zone: range of angles where no tests of radiated immunity are made for OTA AAS BS (i.e. half sphere around the EUT’s radiating direction).
TAB connector: transceiver array boundary connector.
transceiver array boundary: conducted interface between the transceiver unit array and the composite antenna.
transceiver unit: active unit consisting of transmitter and/or receiver which transmits and/or receives radio signals, and which may include passive RF filters.
telecommunication port: ports which are intended to be connected to telecommunication networks (e.g. public switched telecommunication networks, integrated services digital networks), local area networks (e.g. Ethernet, Token Ring) and similar networks.
NOTE: ETSI EN 301 489-1 [21] calls telecommunication port as the "wired network port".
3.2 Symbols
For the purposes of the present document, the following symbols apply:
BWChannel Channel bandwidth
foffset Frequency offset used for discovering narrowband response for receivers
FUL_high The highest frequency of the uplink operating band
FUL_low The lowest frequency of the uplink operating band
ΔfOOB Maximum offset of the out-of-band boundary from the uplink operating band edge
ΔfRIexclusion Maximum offset of the Radiated Immunity exclusion band from the uplink operating band edge for test without spatial exclusion zone applied
3.3 Abbreviations
For the purposes of the present document, the abbreviations given in 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 TR 21.905 [1].
AAS Active Antenna System
AAS BS AAS Base Station
CSA Capability Set supported by the AAS BS
EMC ElectroMagnetic Compatibility
EUT Equipment Under Test
FR1 Frequency Range 1
MSR Multi-Standard Radio
NB-IoT Narrowband – Internet of Things
NR New Radio
RCSA Radiated Capability Set supported by the AAS BS
RDN Radio Distribution Network
RF Radio Frequency
RIB Radiated Interface Boundary
TAB Transceiver Array Boundary