6.4 OTA Output power dynamics

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

6.4.1 General

The requirements in TS 37.105 [6] clause 9.4 apply during the transmitter ON period. Transmit signal quality (as specified in clause 9.6 of the TS 37.105 [6]) shall be maintained for the output power dynamics requirements. Power control is used to limit the interference level. The TA output power requirements are directional requirements and apply to the beam peak directions associated with the beam direction pairs over the OTA peak directions set.

6.4.2 OTA UTRA Inner loop power control in the downlink

6.4.2.1 Definition and applicability

Inner loop power control in the downlink is the ability of the AAS BS transmitter to adjust the transmitter output power of a code channel in accordance with the corresponding TPC symbols received in the uplink.

6.4.2.2 Minimum requirement

For AAS BS in MSR operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.2.2.

For AAS BS in single RAT UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.2.3.

This requirement does not apply to single RAT E-UTRA or NR operation.

6.4.2.3 Test purpose

The test purpose is to verify that the Inner loop power control in the downlink is within the limits specified by the minimum requirement.

6.4.2.4 Method of test

6.4.2.4.1 Initial conditions

Test environment: normal; see annex G.2.

RF channels to be tested: M; see clause 4.12.1.

Beams to be tested: The narrowest declared beam (see table 4.10-1, D9.3, D9.11).

Directions to be tested: The reference beam direction pair (see table 4.10-1, D9.7).

Disable closed loop power control.

The DPCH intended for power control is on channel 120 starting at -3 dB.

Establish downlink power control with parameters as specified in table 6.4.2.4.1-1.

Table 6.4.2.4.1-1: DL power control parameters

Parameter

Level/status

Unit

UL signal mean power

PREFSENS + 10 dB

 dBm

Data sequence

PN9

6.4.2.4.2 Procedure

1) Place the AAS BS at the positioner.

2) Align the manufacturer declared coordinate system orientation (see table 4.10-1, D9.2) of the AAS BS with the test system.

3) Orient the positioner (and BS) in order that the direction to be tested aligns with the test antenna.

4) Configure the beam peak direction of the AAS BS according to the declared beam direction pair

5) Set the AAS BS to transmit using TM2, in TS 25.141 [10], clause 6.1.1.2 at the manufacturers declared rated carrier EIRP (Prated,c,EIRP).

6) Set and send alternating TPC bits from the UE simulator or UL signal generator.

7) Measure mean power level of the code under the test each time TPC command is transmitted by measuring the EIRP for any two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

All steps within power control dynamic range declared by manufacturer (see table 4.10-1, D6.57) shall be measured. Use the code domain power measurement method defined in annex E in TS 25.141 [10].

8) Measure the 10 highest and the 10 lowest power step levels within the power control dynamic range declared by measuring the EIRP for any two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

Measure by sending 10 consecutive equal commands as described in TS 37.105 [6], clause 6.3.2. Table 6.3.2.3-2

In addition, for multi-band RIB(s), the following steps shall apply:

9) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.2.5 Test Requirement

For UTRA FDD the test requirement Inner loop power control is:

a) AAS BS shall fulfil step size requirement shown in table 6.4.2.5-1 for all power control steps declared by manufacture in clause 4.10.

b) For all measured Up/Down cycles, the difference of code domain power between before and after 10 equal commands (Up and Down), derived in step (3), shall not exceed the prescribed tolerance in table 6.4.2.5.1-2.

Table 6.4.2.5-1: UTRA FDD power control step tolerance

Power control commands in the down link

Transmitter power control step tolerance

2 dB step size

1,5 dB step size

1 dB step size

0,5 dB step size

Lower

Upper

Lower

Upper

Lower

Upper

Lower

Upper

Up (TPC command "1")

+0.9 dB

+3.1 dB

+0.65 dB

+2.35 dB

+0.4 dB

+1.6 dB

+0.15 dB

+0.85 dB

Down (TPC command "0")

-0.9 dB

-3.1 dB

-0.65 dB

-2.35 dB

-0.4 dB

-1.6 dB

-0.15 dB

-0.85 dB

Table 6.4.2.5-2: UTRA FDD aggregated power control step range

Power control commands in the down link

Transmitter aggregated power control step change
after 10 consecutive equal commands (up or down)

2 dB step size

1,5 dB step size

1 dB step size

0,5 dB step size

Lower

Upper

Lower

Upper

Lower

Upper

Lower

Upper

Up (TPC command "1")

+15.9 dB

+24.1 dB

+11.9 dB

+18.1 dB

+7.9 dB

+12.1 dB

+3.9 dB

+6.1 dB

Down (TPC command "0")

-15.9 dB

-24.1 dB

-11.9 dB

-18.1 dB

-7.9 dB

-12.1 dB

-3.9 dB

-6.1 dB

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

6.4.3 OTA Power control dynamic range

6.4.3.1 Definition and applicability

The power control dynamic range is the difference between the maximum and the minimum code domain power of a code channel for a specified reference condition.

This requirement applies at each RIB supporting transmission in the operating band.

This requirement applies to UTRA operation only.

6.4.3.2 Minimum Requirement

For AAS BS in MSR operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.3.2.

For AAS BS in single RAT UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.3.3.

This requirement does not apply to single RAT E-UTRA or NR operation.

6.4.3.3 Test purpose

The test purpose is to verify that the power control dynamic range is within the limits specified by the minimum requirement.

6.4.3.4 Method of test

6.4.3.4.1 Initial conditions

Test environment: normal; see annex G.2.

RF channels to be tested: B, M and T; see clause 4.12.1.

Beams to be tested: The narrowest declared beam (see table 4.10-1, D9.3, D9.11).

Directions to be tested: The reference beam direction pair (see table 4.10-1, D9.7).

6.4.3.4.2 Procedure

1) Place the AAS BS at the positioner.

2) Align the manufacturer declared coordinate system orientation (see table 4.10-1, D9.2) of the AAS BS with the test system.

3) Orient the positioner (and BS) in order that the direction to be tested aligns with the test antenna.

4) Configure the beam peak direction of the AAS BS according to the declared beam direction pair.

5) Set the AAS BS to transmit using TM2, in TS 25.141 [10], clause 6.1.1.2 at the manufacturers declared rated carrier EIRP (Prated,c,EIRP).

6) Using TM2, set the code domain EIRP of the DPCH under test to Pmax,c,EIRP – 3 dB. Power levels for other code channels may be adjusted if necessary.

7) Measure the code domain EIRP of the code channel under test by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the AAS BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

Use the code domain power measurement method defined in annex E in TS 25.141 [10].

8) Set the code domain EIRP of the DPCH under test to Pmax,c,EIRP – 28 dB by means determined by the manufacturer. The power levels for the other code channels used in step 2 shall remain unchanged (the overall output power will drop by approximately 3 dB).

9) Measure the code domain EIRP of the code channel under test by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the AAS BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

In addition, for multi-band RIB(s), the following steps shall apply:

10) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.3.5 Test Requirement

For UTRA FDD the test requirement Inner loop power control is:

Downlink (DL) power control dynamic range:

– maximum code domain power: maximum EIRP (Pmax,c,EIRP) –4.1 dB or greater;

– minimum code domain power: maximum EIRP (Pmax,c,EIRP) –26.9 dB or less.

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

6.4.4 OTA total power dynamic range

6.4.4.1 Definition and applicability

The total power dynamic range is the difference between the maximum and the minimum output power for a specified reference condition.

This requirement applies at each RIB supporting transmission in the operating band.

NOTE 1: The upper limit of the dynamic range is the BS maximum carrier EIRP (Pmax,c,EIRP). The lower limit of the dynamic range is the lowest minimum power from the AAS BS when no traffic channels are activated in the same direction using the same beam.

Particularly for E-UTRA, the total power dynamic range is the difference between the maximum and the minimum transmit power of an OFDM symbol for a specified reference condition.

NOTE 2: The upper limit of the dynamic range at a RIB is the OFDM symbol power at maximum carrier EIRP (Pmax,c,EIRP) when transmitting on all RBs. The lower limit of the dynamic range at a RIB is the OFDM symbol power when one resource block is transmitted. The OFDM symbol carries PDSCH or sPDSCH (for sTTI) and not contain RS, PBCH or synchronization signals in the same direction using the same beam.

6.4.4.2 Minimum Requirement

For AAS BS in MSR operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.4.2.

For AAS BS in single RAT UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.4.3.

For AAS BS in single RAT E-UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.4.4.

The minimum requirement for NR operation is in TS 38.104 [33], clause 6.3.3.2.

6.4.4.3 Test purpose

The test purpose is to verify that the total power dynamic range is within the limits specified by the minimum requirement.

6.4.4.4 Method of test

6.4.4.4.1 Initial conditions

Test environment: normal; see annex G.2.

RF channels to be tested: B, M and T; see clause 4.12.1.

Base Station RF Bandwidth positions to be tested for multi-carrier: BRFBW, MRFBW and TRFBW in single band operation; see clause 4.12.1.

Beams to be tested: The narrowest declared beam (see table 4.10-1, D9.3, D9.11).

Directions to be tested: The reference beam direction pair (see table 4.10-1, D9.7).

6.4.4.4.2 Procedure

6.4.4.4.2.1 General procedure

1) Place the AAS BS at the positioner.

2) Align the manufacturer declared coordinate system orientation (see table 4.10-1, D9.2) of the AAS BS with the test system.

3) Orient the positioner (and BS) in order that the direction to be tested aligns with the test antenna.

4) Configure the beam peak direction of the AAS BS according to the declared beam direction pair.

6.4.4.4.2.2 UTRA FDD

5) Set the AAS BS to transmit using TM2, in TS 25.141 [10], clause 6.1.1.2 at the manufacturers declared rated carrier EIRP (Prated,c,EIRP).

The downlink total dynamic range is computed as the difference of the maximum EIRP, measured as defined in step 6 in clause 6.2.4.2 and the EIRP measured at step 3 of the Error Vector Magnitude test, as described in clause 6.6.4.4.2.1.

In addition, for multi-band RIB(s), the following steps shall apply:

6) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.4.4.2.3 E-UTRA

5) Set the AAS BS to transmit using E-TM 3.1 (or sE-TM3.1-1 for subslot TTI, or sE-TM3.1-2 for slot TTI), as defined in TS 36.141 [12] clause 6.1.1 at the manufacturers declared rated carrier EIRP (Prated,c,EIRP).

6) Measure the average OFDM symbol EIRP as defined in annex F in TS 36.141 [12] by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the AAS BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

7) Set the AAS BS to transmit using E-TM2 (or sE-TM2-1 for subslot TTI, or sE-TM2-2 for slot TTI, with the same selection as in step 5), as defined in TS 36.141 [12] clause 6.1.1.

8) Measure the average OFDM symbol power as defined in annex F of TS 36.141 [12] by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the AAS BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

The measured OFDM symbols shall not contain RS, PBCH or synchronisation signals.

9) If BS supports 256QAM, set the channel set-up of the transmitted signal according to E-TM3.1a (or sE-TM3.1a-1 for subslot TTI, or sE-TM3.1a-2 for slot TTI).and repeat step 6. Set to transmit a signal according to E-TM 2a (or sE-TM2a-1 for subslot TTI, or sE-TM2a-2 for slot TTI) and repeat step 8.

10) If BS supports 1024QAM, set the channel set-up of the TAB connector transmitted signal according to E-TM3.1b and repeat step 6. Set the TAB connector to transmit a signal according to E-TM2b and repeat step 8.

In addition, for multi-band RIB(s), the following steps shall apply:

11) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.4.4.2.4 NR

5) Set the BS to transmit a signal according to:

– NR-FR1-TM3.1b as defined in TS 38.141-1 [35] clause 4.9.2.2.6a if 1024QAM is supported by BS without power back off, or

– NR-FR1-TM3.1a as defined in TS 38.141-1 [35] clause 4.9.2.2.6 if 1024QAM is not supported by BS without power back off and 256QAM is supported by BS without power back off, or

– NR-FR1-TM3.1 as defined in TS 38.141-1 [35] clause 4.9.2.2.5 if 1024QAM and 256QAM are both not supported by BS without power back off.

6) Measure the average OFDM symbol power as defined by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

7) Set the BS to transmit a signal according to:

– NR-FR1-TM2b as defined in TS 38.141-1 [35] clause 4.9.2.2.4a if 1024QAM is supported by BS, or

– NR-FR1-TM2a as defined in TS 38.141-1 [35] clause 4.9.2.2.4 if 1024QAM is not supported by BS but 256QAM is supported by BS, or

– NR-FR1-TM2 as defined in TS 38.141-1 [35] clause 4.9.2.2.3 if 1024QAM and 256QAM are not supported by BS.

8) Measure the average OFDM symbol power as defined by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

The measured OFDM symbols shall not contain RS or SSB.

In addition, for multi-band RIB(s), the following steps shall apply:

9) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.4.5 Test Requirement

6.4.4.5.1 UTRA FDD

For UTRA FDD the downlink total power dynamic range shall be 17.7 dB or greater.

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

6.4.4.5.2 E-UTRA

The downlink (DL) total power dynamic range for each E-UTRA carrier shall be larger than or equal to the level in table 6.4.4.5.1-1.

Table 6.4.4.5.2-1 E-UTRA total power dynamic range, paired spectrum

E-UTRA

channel bandwidth (MHz)

Total power dynamic range (dB)

1.4

7.3

3

11.3

5

13.5

10

16.5

15

18.3

20

19.6

NOTE 1: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

NOTE 2: Additional test requirements for the Error Vector Magnitude (EVM) at the lower limit of the dynamic range are defined in clause 6.6.4.5.

6.4.4.5.3 NR

The downlink (DL) total power dynamic range for each NR carrier shall be larger than or equal to the level in table 6.4.4.5.3-1.

Table 6.4.4.5.3-1: Total power dynamic range

BS channel bandwidth (MHz)

Total power dynamic range

(dB)

15 kHz SCS

30 kHz SCS

60 kHz SCS

5

13.5

10

N/A

10

16.7

13.4

10

15

18.5

15.3

12.1

20

19.8

16.6

13.4

25

20.8

17.7

14.5

30

21.6

18.5

15.3

35

22.7

19.6

16.4

40

22.9

19.8

16.6

45

23.8

20.7

17.6

50

23.9

20.8

17.7

60

N/A

21.6

18.5

70

N/A

22.3

19.2

80

N/A

22.9

19.8

90

N/A

23.4

20.4

100

N/A

23.9

20.9

NOTE 1: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

NOTE 2: Additional test requirements for the Error Vector Magnitude (EVM) at the lower limit of the dynamic range are defined in clause 6.6.4.5.

6.4.5 OTA IPDL time mask

6.4.5.1 Definition and applicability

To support IPDL location method in UTRA FDD operation, the AAS BS shall interrupt all transmitted signals in the downlink (i.e. common and dedicated channels). The IPDL time mask specifies the limits at the RIB output power during these idle periods.

This requirement applies only to AAS BS supporting IPDL. The requirement applies at each RIB supporting transmission in the operating band.

6.4.5.2 Minimum Requirement

For AAS BS in MSR operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.5.2.

For AAS BS in single RAT UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.5.3.

This requirement does not apply to single RAT E-UTRA or MSR E-UTRA/NR operation.

6.4.5.3 Test purpose

The test purpose is to verify the ability of the AAS BS to temporarily reduce its output power below a specified value to improve time difference measurements made by UE for location services.

6.4.5.4 Method of test

6.4.5.4.1 Initial conditions

Test environment: normal; see annex G.2.

RF channels to be tested: B, M and T; see clause 4.12.1.

Beams to be tested: The narrowest declared beam (see table 4.10-1, D9.3, D9.11).

Directions to be tested: The reference beam direction pair (see table 4.10-1, D9.7).

Configure the AAS BS to produce idle periods in continuous mode. The IPDL parameters as defined in TS 25.214 [23] shall have the following values:

– IP_Spacing = 5

– IP_Length = 10 CPICH symbols

– Seed = 0

6.4.5.4.2 Procedure

1) Place the AAS BS at the positioner.

2) Align the manufacturer declared coordinate system orientation (see table 4.10-1, D9.2) of the AAS BS with the test system.

3) Orient the positioner (and BS) in order that the direction to be tested aligns with the test antenna.

4) Configure the beam peak direction of the AAS BS according to the declared beam direction pair.

5) Set the AAS BS to transmit using TM1, in TS 25.141 [10], clause 6.1.1.2 at the manufacturers declared rated carrier EIRP(Prated,c,EIRP).

6) Measure the mean EIRP over a period starting 27 chips after the beginning of the IPDL period and ending 27 chips before the expiration of the IPDL period by either a) or b) below:

a) If the test facility only supports single polarization, then measure EIRP with the test facility’s test antenna/probe polarization matched to the AAS BS. Sum the EIRP measured on both polarizations.

b) If the test facility supports dual polarization then measure total EIRP for two orthogonal polarizations (denoted p1 and p2) and calculate total radiated transmit power for particular beam direction pair as EIRP = EIRPp1 + EIRPp2.

In addition, for multi-band RIB(s), the following steps shall apply:

7) For multi-band RIBs and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band.

6.4.5.5 Test Requirement

The mean EIRP measured according to step (3) in clause 6.4.5.4.2 shall be equal to or less than

maximum EIRP (Pmax,c,EIRP) – 34.3 dB.

See also figure 6.4.5.5-1.

Figure 6.4.5.5-1: IPDL Time Mask

NOTE: If the above Test Requirement differs from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test is defined in clause 4.1.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in annex C.

6.4.6 OTA RE Power control dynamic range

6.4.6.1 Definition and applicability

The RE power control dynamic range is the difference between the power of an RE and the average RE power for an AAS BS at maximum output power (Prated,c,TRP) for a specified reference condition.

This requirement applies at each RIB supporting transmission in the operating band.

6.4.6.2 Minimum Requirement

For AAS BS in MSR operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.6.2.

This requirement does not apply to single RAT UTRA operation.

For AAS BS single RAT E-UTRA operation the minimum requirement is defined in TS 37.105 [6], clause 9.4.6.4.

6.4.6.3 Method of test

No specific test or test requirements are defined for RE Power control dynamic range. The Error Vector Magnitude test, as described in clause 6.6.4 provides sufficient test coverage for this requirement.