7.7F Spurious response 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

7.7F.1 Test purpose

Spurious response verifies the receiver’s ability to receive a wanted signal on its assigned channel frequency without exceeding a given degradation due to the presence of an unwanted CW interfering signal at any other frequency at which a response is obtained i.e. for which the out of band blocking limit as specified in sub-clause 7.6.2 is not met.

The lack of the spurious response ability decreases the coverage area when other unwanted interfering signal exists at any other frequency.

7.7F.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.

7.7F.3 Minimum conformance requirements

The category NB1 and NB2 UE throughput shall be ≥ 95% of the maximum throughput of the reference measurement channel as specified in Annexe A.3.2 with parameters specified in Tables 7.7F.3-1.

Table 7.7F.3-1: Spurious response parameters for category NB1 and NB2

Parameter	Unit	Level
Psignal	dBm	REFSENS+6
PInterferer (CW)	dBm	-44
FInterferer	MHz	Spurious response frequencies
Number of spurious response frequencies		24 (in OOB range 1, 2, 3)
NOTE 1: Reference measurement channel is specified in Annex FFS. NOTE 2: The REFSENS power level is specified in 7.3.1F.1-1. NOTE 3: OOB range 1, 2, 3 refers to Table 7.6.2.1F-1.

The normative reference for this requirement is TS 36.101 [2] clause 7.7.1F.

7.7F.4 Test description

7.7F.4.1 Initial conditions

The initial conditions shall be the same as in clause 7.6.2F.4.1 in order to test spurious responses obtained in clause 7.6.2F under the same conditions.

7.7F.4.2 Test procedure

1. SS transmits NPDSCH via NPDCCH DCI format N1 for C_RNTI to transmit the DL RMC according to Table 7.6.2F.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 parameters of the CW signal generator for an interfering signal according to Table 7.7F.5-1. The spurious frequencies are taken from records in the final step of test procedures in clause 7.6.2F.4.2

3. Set the Downlink signal level according to the Table 7.7F.5-1.

4. For the spurious frequency, measure the average throughput for a duration sufficient to achieve statistical significance according to Annex G.2.

7.7F.4.3 Message contents

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

7.7F.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 Annex A.3.2 with parameters specified in Tables 7.7F.5-1.

Table 7.7F.5-1: Spurious response parameters for category NB1 and NB2

Parameter	Unit	Level
Psignal	dBm	REFSENS+6
PInterferer (CW)	dBm	-44
FInterferer	MHz	Spurious response frequencies
Number of spurious response frequencies		24 (in OOB range 1, 2, 3)
NOTE 1: Reference measurement channel is specified in Annex FFS. NOTE 2: The REFSENS power level is specified in 7.3.1F.1-1. NOTE 3: OOB range 1, 2, 3 refers to Table 7.6.2.1F-1.