7.2 OTA sensitivity

37.145-23GPPActive Antenna System (AAS) Base Station (BS) conformance testingPart 2: radiated conformance testingRelease 17TS

7.2.1 Definition and applicability

The OTA sensitivity requirement is based upon the declaration of one or more OTA sensitivity direction declarations (OSDD), related to an AAS BS receiver.

The AAS BS receiver may optionally be capable of redirecting/changing the receiver target by means of adjusting BS settings resulting in multiple sensitivity RoAoA. The sensitivity RoAoA resulting from the current AAS BS settings is the active sensitivity RoAoA.

If the AAS BS is capable of redirecting the receiver target related to the OSDD then the OSDD shall include:

– The set(s) of RAT, Channel bandwidth and declared minimum EIS level applicable to any active sensitivity RoAoA inside the receiver target redirection range in the OSDD.

– A declared receiver target redirection range, describing all the angles of arrival that can be addressed for the OSDD through alternative settings in the AAS BS.

– Five declared sensitivity RoAoA comprising the conformance testing directions as detailed in [7].

– The receiver target reference direction.

NOTE 1: Some of the declared sensitivity RoAoA may coincide depending on the redirection capability.

NOTE 2: In addition to the declared sensitivity RoAoA, several sensitivity RoAoA may be implicitly defined by the receiver target redirection range without being explicitly declared in the OSDD.

NOTE 3: (Void)

If the AAS BS is not capable of redirecting the receiver target related to the OSDD, then the OSDD includes only:

– The set(s) of RAT, Channel bandwidth and declared minimum EIS level applicable to the sensitivity RoAoA in the OSDD.

– One declared active sensitivity RoAoA.

– The receiver target reference direction.

NOTE 4: For AAS BS without target redirection capability, the declared (fixed) sensitivity RoAoA is always the active sensitivity RoAoA.

The OTA sensitivity EIS level declaration shall apply to each supported polarization, under the assumption of polarization match.

7.2.2 Minimum Requirement

The minimum requirement for MSR & NR operation is in TS 37.105 [6], clause 10.2.2.

For AAS BS in single RAT UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 10.2.3.

For AAS BS in single RAT E-UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 10.2.4.

7.2.3 Test Purpose

The test purpose is to verify that the AAS BS can meet the BER or throughput requirement for a specified measurement channel at the EIS level and the range of angles of arrival declared in the OSDD.

7.2.4 Method of test

7.2.4.1 Initial conditions

Test environment:

– normal: see annex G.2.

RF channels to be tested:

– M; see clause 4.12.1.

Directions to be tested:

receiver target reference direction (see table 4.10-1, D10.9),

– conformance test directions (see table 4.10-1, D10.10).

7.2.4.2 Procedure

1) Place the AAS BS with its manufacturer declared coordinate system reference point in the same place as calibrated point in the test system, as shown in annex D1.1.

2) Align the manufacturer declared coordinate system orientation of the AAS BS with the test system.

3) Align the BS with the test antenna in the declared direction to be tested.

4) Ensure the polarization is accounted for such that all the power from the test antenna is captured by the AAS BS under test.

5) Configure the beam peak direction of the AAS BS according to declared reference beam direction pair for the appropriate beam identifier.

6) Set the AAS BS to transmit the beam(s) of the same operational band and RAT as the OSDD being tested according to the appropriate test configuration in clause 5.

7) Start the signal generator for the wanted signal to transmit:

– 12.2 kbps DPCH with reference measurement channel defined in annex A in TS 25.141 [10] (PN-9 data sequence or longer) for UTRA FDD.

– UL reference measurement channel (12.2 kbps) defined in annex A.2.1 in TS 25.142 [11] for UTRA TDD 1.28Mcps operation.

– The test signal as specified in clause 7.2.5.4 for E-UTRA.

– The test signal as specified in clause 7.2.5.5 for NR.

8) Set the test signal mean power so the calibrated radiated power at the AAS BS Antenna Array coordinate system reference point is as specified in clause 7.2.5.

9) Measure:

– BER according to annex C in TS 25.141 [10] for FDD UTRA.

– BER according to annex F in TS 25.142 [11] for TDD UTRA.

– Throughput according to annex E in TS 36.141 [12] for E-UTRA.

– Throughput according to annex A in TS 38.141-2 [34] for NR.

10) Repeat steps 3 to 9 for all OSDD(s) declared for the AAS BS (see table 4.10-1, D10.1), and supported polarizations.

For multi-band capable AAS BS and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carriers activated in the other band.

7.2.5 Test Requirements

7.2.5.1 General

The minimum EIS level is a declared figure for each OSDD (see table 4.10-1, D10.6). The test requirement is calculated from the declared value offset by the EIS Test Tolerance specified in clause 4.1.2.3.

7.2.5.2 UTRA FDD Test Requirements

The BER measurement result in step 9 of clause 7.2.4.2 shall not be greater than the limit specified in table 7.2.5.2-1.

Table 7.2.5.2-1: EIS levels

Reference measurement channel

Reference measurement

OTA sensitivity ( dBm)

BER

channel data rate

f ≤ 3.0 GHz

3.0 GHz < f ≤ 4.2 GHz

12.2kbps DPCH with reference measurement channel defined in annex A in TS 25.141 [10] (PN-9 data sequence or longer)

12.2 kbps

Declared minimum EIS (D10.6) + 1.3 dB

Declared minimum EIS (D10.6) + 1.4 dB

BER shall not exceed 0.001

7.2.5.3 UTRA TDD 1,28Mcp option Test Requirements

The BER measurement result in step 9 of clause 7.2.4.2 shall not be greater than the limit specified in table 7.2.5.3-1.

Table 7.2.5.3-1: EIS levels

Reference measurement channel

Reference measurement

OTA sensitivity ( dBm)

BER

channel data rate

f ≤ 3.0 GHz

3.0 GHz < f ≤ 4.2 GHz

UL reference measurement channel (12.2 kbps) defined in annex A.2.1 in TS 25.142 [11]

12.2 kbps

Declared minimum EIS (D10.6) + 1.3 dB

Declared minimum EIS (D10.6) + 1.4 dB

BER shall not exceed 0.001

7.2.5.4 E-UTRA Test Requirements

For each measured E-UTRA carrier, the throughput measured in step 9 of clause 7.2.4.2 shall be ≥ 95 % of the maximum throughput of the reference measurement channel as specified in TS 36.141 [12] annex A.1 with parameters specified in table 7.2.5.4-1.

Table 7.2.5.4-1: EIS levels

E-UTRA channel

Reference measurement channel

OTA sensitivity (dBm)

bandwidth (MHz)

f ≤ 3.0 GHz

3.0 GHz < f ≤ 4.2 GHz

1.4

FRC A1-1 in annex A.1 [12]

3

FRC A1-2 in annex A.1 [12]

5

FRC A1-3 in annex A.1 [12]

10

FRC A1-3 in annex A.1 [12]

(Note)

Declared minimum EIS (D10.6) + 1.3 dB

Declared minimum EIS (D10.6) + 1.4 dB

15

20

NOTE: EIS is the power level of a single instance of the reference measurement channel. This requirement shall be met for each consecutive application of a single instance of FRC A1-3 in [11] mapped to disjoint frequency ranges with a width of 25 Resource Blocks each. This reference measurement channel is not applied for Band 46 nor Band 49.

7.2.5.5 NR Test Requirements

For each measured carrier, the throughput measured in step 9 of clause 7.2.4.2 shall be ≥ 95 % of the maximum throughput of the reference measurement channel as specified in TS 38.104 [33] annex A.1 with parameters specified in table 7.2.5.5-1.

Table 7.2.5.5-1: EIS levels

BS channel

Sub-carrier

Reference

EIS level [dBm]

bandwidth [MHz]

spacing [kHz]

measurement channel

f ≤ 3.0 GHz

3.0 GHz < f ≤ 4.2 GHz

5, 10, 15

15

G-FR1-A1-1 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4

10, 15

30

G-FR1-A1-2 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4

10, 15

60

G-FR1-A1-3 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4

20, 25, 30, 35, 40, 45, 50

15

G-FR1-A1-4 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4

20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100

30

G-FR1-A1-5 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4

20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100

60

G-FR1-A1-6 in clause A.1 in [33]

Declared minimum EIS + 1.3

Declared minimum EIS + 1.4