7.6.1F In-band blocking for category NB1 and NB2

36.521-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Part 1: Conformance testingRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification

7.6.1F.1 Test Purpose

In-band blocking is defined for an unwanted interfering signal falling into the range from 15MHz below to 15MHz above the UE receive band, at which the relative throughput shall meet or exceed the requirement for the specified measurement channels.

The lack of in-band blocking ability will decrease the coverage area when other e-NodeB transmitters exist (except in the adjacent channels and spurious response).

7.6.1F.2 Test Applicability

This test case applies to all types of NB-IoT FDD UE release 13 and forward of category NB1.

This test case applies to all types of NB-IoT FDD UE release 14 and forward of category NB2.

This test case applies to all types of NB-IoT TDD UE release 15 and forward of category NB1 and NB2.

7.6.1F.3 Minimum Conformance Requirements

Category NB1 and NB2 UE throughput shall be ≥ 95% of the maximum throughput of the reference measurement channel as specified in Annex A.3.2 with parameters specified in Table 7.6.1F.3-1.

Table 7.6.1F.3-1: In-band blocking parameters for category NB1 and NB2

IBB1 test Parameters
Category NB1 or NB2 signal power (Pwanted) / dBm	REFSENS + 6 dB
Interferer	E-UTRA
Interferer signal power (PInterferer ) / dBm	– 56 dBm
Interferer bandwidth	5 MHz
Interferer offset from category NB1 or NB2 channel edge	+7.5 MHz + 0.005 MHz and -7.5 MHz – 0.005 MHz
IBB2 test Parameters
Category NB1 or NB2 signal power (Pwanted ) / dBm	REFSENS + 6 dB
Interferer	E-UTRA
Interferer signal power (PInterferer ) / dBm	– 44 dBm
Interferer bandwidth	5 MHz
Interferer offset range from category NB1 or NB2 channel edge	From +12.5 MHz to FDL_high + 15 MHz and From -12.5 MHz to FDL_low – 15 MHz

The normative reference for this requirement is TS 36.101 [2] clause 7.6.1.1F.

7.6.1F.4 Test Description

7.6.1F.4.1 Initial Conditions

Initial conditions are a set of test configurations the UE needs to be tested in and the steps for the SS to take with the UE to reach the correct measurement state.

The initial test configurations consist of environmental conditions and test frequencies based on the subset of E-UTRA operating bands defined for NB-IoT in clause 5.2F. All of these configurations shall be tested with applicable test parameters, and are shown in table 7.6.1F.4.1-1. The details of the downlink reference measurement channels (RMCs) are specified in Annex A.3. Configurations of NPDSCH and NPDCCH before measurement are specified in Annex C.2.

Table 7.6.1F.4.1-1: Test Configuration Table

Initial Conditions
Test Environment as specified in TS 36.508 [7] clause 8.1.1			NC
Test Frequencies as specified in TS36.508 [7] clause 8.1.3.1			Frequency ranges defined in Annex K.1.1
Configuration ID	Downlink Configuration		Uplink Configuration
	Modulation	Subcarriers	Modulation	Ntones	Subcarrier spacing
1	QPSK	12	BPSK	1@0	15 kHz

1. Connect the SS to the UE antenna connector as shown in TS 36.508 [7] Annex A, Figure A.4 using only the main UE Tx/Rx antenna.

2. The parameter settings for the cell are set up according to TS 36.508 [7] subclause 8.1.4.3.

3. Downlink signals are initially set up according to Annex C.0, C.1 and C.2, and NPUSCH Format 2 is used to carry ACK/NACK on the uplink.

4. The DL Reference Measurement channel is set according to Table 7.6.1F.4.1-1.

5. Propagation conditions are set according to Annex B.0.

6. Ensure the UE is in State 2A-NB with CP CIoT Optimisation according to TS 36.508 [7] clause 8.1.5. Message contents are defined in clause 7.6.1F.4.3.

7.6.1F.4.2 Test Procedure

1. SS transmits NPDSCH via NPDCCH DCI format N1 for C_RNTI to transmit the DL RMC according to Table 7.6.1F.4.1-1. The SS sends downlink MAC padding bits on the DL RMC. The UE will send HARQ feedback based on information contained in DCI format N1.

2. Set the downlink signal level according to the table 7.6.1F.5-1.

3. Set the parameters of the signal generator for an interfering signal below the wanted signal in IBB1 according to Table 7.6.1F.5-1.

4. Measure the average throughput for a duration sufficient to achieve statistical significance according to Annex G.2.

5. Repeat steps from 3 to 4, using an interfering signal above the wanted signal in IBB1 at step 3.

6. Repeat steps from 3 to 5, using interfering signals in IBB2 at step 3 and 5. The ranges of IBB2 are covered in steps equal to the interferer bandwidth. The test frequencies are chosen in analogy to table 7.6.1F.4.2-1.

Table 7.6.1F.4.2-1: Example for interferer frequencies

	Lower frequency	Upper frequency
Band 1 DL	2110 MHz	2170 MHz
Band 1 Midrange	2140 MHz
Receive band wanted signal (BW 200KHz)	2139.9 MHz	2140.1 MHz
Interferer IBB1	2132.395 MHz	2147.605 MHz
Interferer IBB2	2127.4 MHz	2152.6 MHz
Outer limit for in band blocking	2095MHz	2185MHz

7.6.1F.4.3 Message Contents

Message contents are according to TS 36.508 [7] clause 8.1.6.

7.6.1F.5 Test Requirement

The throughput measurement derived in test procedure shall be ≥ 95% of the maximum throughput of the reference measurement channels as specified in clause A.3.2 with parameters specified in Tables 7.6.1F.5-1.

Table 7.6.1F.5-1: In-band blocking parameters for category NB1 and NB2

IBB1 test Parameters
Category NB1 or NB2 signal power (Pwanted ) / dBm	REFSENS + 6 dB
Interferer	E-UTRA
Interferer signal power (PInterferer ) / dBm	– 56 dBm
Interferer bandwidth	5 MHz
Interferer offset from category NB1 or NB2 channel edge	+7.5 MHz + 0.005 MHz and -7.5 MHz – 0.005 MHz
IBB2 test Parameters
Category NB1 or NB2 signal power (Pwanted ) / dBm	REFSENS + 6 dB
Interferer	E-UTRA
Interferer signal power (PInterferer ) / dBm	– 44 dBm
Interferer bandwidth	5 MHz
Interferer offset range from category NB1 or NB2 channel edge	From +12.5 MHz to FDL_high + 15 MHz and From -12.5 MHz to FDL_low – 15 MHz