B.6 Interference model for enhanced performance requirements type A and type B

36.1043GPPBase Station (BS) radio transmission and receptionEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18TS

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

This clause provides a description for the modelling of inter-cell interfering UE transmissions for enhanced performance requirements type A and type B, including: definition of dominant interferer proportion, interference model for synchronous scenario and interference model for asynchronous scenario.

B.6.1 Dominant interferer proportion

Each inter-cell interferer involved in enhanced performance requirements type A and type B is characterized by its associated dominant interferer proportion (DIP) value:

( = 1,…, )

where is the received energy from the i-th strongest inter-cell interferer involved in the requirement scenario and where is the the energy of the white noise source consistent with the definition provided in clause 8.1 and is the total number of simultaneously transmitted inter-cell interferers involved in a given requirement scenario.

B.6.2 Interference model for synchronous scenario

This clause provides interference modelling for each explicitly modelled inter-cell interferer in the requirement scenario where the inter-cell interferer(s) are time-synchronous with the tested signal.

In each subframe, each interferer shall transmit 16QAM randomly modulated data over the entire PUSCH region and the same resource blocks as the tested signal. Demodulation reference signal, configured according to Table 8.2.6-1 for enhanced performance requirements type A, and Table 8.2.9-1 to Table 8.2.9-2 for enhanced performance requirements type B, is transmitted associated with the transmission of PUSCH.

B.6.3 Interference model for asynchronous scenario

This clause provides interference modelling for each explicitly modelled inter-cell interferer in the requirement scenario where the inter-cell interferer(s) are time-asynchronous with the tested signal.

Two interfering UEs from the same interfering cell, named interferer 1-1 and interferer 1-2, are modelled. Interferer 1-1 and interferer 1-2 shall transmit 16QAM randomly modulated data over the entire PUSCH region and the same resource blocks as the tested signal, respectively in the even subframes and odd subframes, as illustrated in Figure B.6.3-1. Demodulation reference signal, configured according to Table 8.2.6A-1, is transmitted associated with the transmission of PUSCH. The transmissions of both interferer 1-1 and interferer 1-2 are delayed with respect to the tested signal by 0.33 ms.

Figure B.6.3-1: Configuration of asynchronous interferers

Annex C (normative):
Characteristics of the interfering signals

For E-UTRA or E-UTRA with NB-IoT (in-band and/or guard band operation) BS, the interfering signal shall be a PUSCH containing data and reference symbols. Normal cyclic prefix is used. The data content shall be uncorrelated to the wanted signal and modulated according to clause 5 of TS36.211. Mapping of PUSCH modulation to receiver requirement are specified in table C-1.1.

Table C-1: Modulation of the interfering signal

Receiver requirement	Modulation
In-channel selectivity	16QAM
Adjacent channel selectivity and narrow-band blocking	QPSK
Blocking	QPSK
Receiver intermodulation	QPSK

For NB-IoT standalone BS, the interfering signal shall be a NPUSCH containing data and reference symbols. Normal cyclic prefix is used. The data content shall be uncorrelated to the wanted signal and modulated according to clause 10.1 of TS36.211. Mapping of NPUSCH modulation to receiver requirement are specified in table C-2.

Table C-2: Modulation of the interfering signal – NB-IoT

Receiver requirement	Modulation
Adjacent channel selectivity and narrow-band blocking	π/4 QPSK
Blocking	π/4 QPSK
Receiver intermodulation	π/4 QPSK

Annex D (normative):
Environmental requirements for the BS equipment

The BS equipment shall fulfil all the requirements in the full range of environmental conditions for the relevant environmental class from the relevant IEC specifications listed below

60 721-3-3 "Stationary use at weather protected locations" [13]

60 721-3-4 "Stationary use at non weather protected locations" [14]

Normally it should be sufficient for all tests to be conducted using normal test conditions except where otherwise stated. For guidance on the use of test conditions to be used in order to show compliance refer to TS 36.141.

Annex E (normative):
Error Vector Magnitude