6.3 Output power dynamics

37.145-13GPPActive Antenna System (AAS) Base Station (BS) conformance testingPart 1: conducted conformance testingRelease 17TS

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

6.3.1 General

The requirements in clause 6.3 apply during the transmitter ON period. Transmit signal quality (as specified in clause 6.5) shall be maintained for the output power dynamics requirements.

6.3.2 UTRA Inner loop power control in the downlink

6.3.2.1 Definition and applicability

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

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

6.3.2.2 Minimum requirement

The minimum requirement for UTRA FDD operation is in TS 37.105 [8], clause 6.3.2.

The minimum requirement for UTRA TDD 1,28 Mcps option operation is in TS 25.105 [10], clause 6.4.2.1.

There is no Inner loop power control requirement for E-UTRA or NR operation.

6.3.2.3 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.

6.3.2.4 Method of test

6.3.2.4.1 Initial conditions

6.3.2.4.1.1 General test conditions

Test environment:

– normal; see annex B.

RF channels to be tested:

– B, M and T; see clause 4.12.1.

Disable closed loop power control.

6.3.2.4.1.2 UTRA FDD

Set each TAB connector to output a signal in accordance to TM2, in TS 25.141 [18], clause 6.1.1.2.

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

Establish downlink power control with parameters as specified in table 6.3.2.4.1.2-1.

Table 6.3.2.4.1.2-1: DL power control parameters

Parameter	Level/status	Unit
UL signal mean power	PREFSENS + 10 dB	dBm
Data sequence	PN9

6.3.2.4.1.3 UTRA TDD

Set the initial parameters of the TAB connector transmitted signal according to table 6.3.2.4.1.3-1.

Operate the TAB connector in such a mode that it is able to interpret received TPC commands.

NOTE: The BS tester used for this test must have the ability:

– to analyze the output signal of the TAB connector under test with respect to code domain power, by applying the global in-channel Tx test method described in annex E of TS 25.142 [20];

– to simulate an UE with respect to the generation of TPC commands embedded in a valid UE signal.

Table 6.3.2.4.1.3-1: Initial parameters of the TAB connector signal
for power control steps test for 1,28 Mcps TDD

Parameter	Value/description
TDD Duty Cycle	TS i; i = 0, 1, 2, …, 6: transmit, if i is 0, 4,5,6; receive, if i is 1,2,3.
Time slots under test	TS4, TS5 and TS6
Number of DPCH in each time slot under test	1
Data content of DPCH	real life (sufficient irregular)

6.3.2.4.2 Procedure

6.3.2.4.2.1 General procedure

The minimum requirement is applied to all TAB connectors, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in clause D.1.1. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested.

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

2) Set the TAB connector to transmit at manufacturers rated carrier output power per TAB connector (P_Rated,c,TABC).

6.3.2.4.2.2 UTRA FDD

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

2) Measure mean power level of the code under the test each time TPC command is transmitted. 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 [18].

3) Measure the 10 highest and the 10 lowest power step levels within the power control dynamic range declared by manufacturer by sending 10 consecutive equal commands as described in TS 37.105 [8], clause 6.3.2. Table 6.3.2.3-2

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

1) For multi-band TAB connectors 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.

6.3.2.4.2.3 UTRA TDD

1) Configure the TAB connector to enable power control steps of size 1 dB.

2) Set the BS tester to produce a sequence of TPC commands related to the active DPCH. This sequence shall be transmitted to the AAS BS within receive time slots TS i of the AAS BS and shall consist of a series of TPC commands with content "Decrease Tx power", followed by a series of TPC commands with content "Increase Tx power". Each of these series should be sufficiently long so that the code domain power of the active DPCH is controlled to reach its minimum and its maximum, respectively.

3) Measure the code domain power of the active DPCH over the 848 active chips of each transmit time slot AAS TS i of the AAS BS (this excludes the guard period) by applying the global in-channel Tx test method described in annex E in TS 25.142 [20].

4) Based on the measurement made in step (5), calculate the power control step sizes and the average rate of change per 10 steps.

5) Configure the BS transmitter to enable power control steps of 2 dB and of 3 dB, respectively, and repeat steps (4) to (6).

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

6) For multi-band TAB connectors 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.

6.3.2.5 Test requirements

6.3.2.5.1 UTRA FDD

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

a) TAB connector shall fulfil step size requirement shown in table 6.3.2.5.1-1 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 6.3.2.5.1-2.

Table 6.3.2.5.1-1: UTRA FDD TAB connector power control step tolerance

Power control commands in the downlink	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 6.3.2.5.1-2: UTRA FDD TAB connector aggregated power control step range

Power control commands in the downlink	Transmitter aggregated power control step range 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.

6.3.2.5.2 UTRA TDD

For UTRA TDD 1,28 Mcps option the test requirement Inner loop power control is:

For all measurements, the tolerance of the power control step sizes and the average rate of change per 10 steps shall be within the limits given in table 6.3.2.5.2-1.

Table 6.3.2.5.2-1: Test Requirements for power control step size tolerance

Step size	Single step tolerance	Range of average rate of change in code domain power per 10 steps
		Minimum	maximum
1 dB	±0,6 dB	±7,7 dB	±12,3 dB
2 dB	±0,85 dB	±15,7 dB	±24,3 dB
3 dB	±1,1 dB	±23,7 dB	±36,3 dB

In case, the power control step size is set to 3 dB, the number of power control steps feasible within the power control dynamic range of the TAB connector under test may be less than 10. In this case, the evaluation of the average rate of change in code domain power shall be based on the number of power control steps actually feasible, and the permitted range of average rate of change shall be reduced compared to the values given in table 6.3.2.5.2-1 in proportion to the ratio (number of power control steps actually feasible /10).

EXAMPLE: If the number of power control steps actually feasible is 9, the minimum and maximum value of the range of average rate of change in code domain power are given by 21,6 dB and 32,4 dB, respectively.

6. 3.3 Power control dynamic range

6.3.3.1 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 TAB connector supporting transmission in the operating band.

6.3.3.2 Minimum requirement

The minimum requirement for UTRA FDD operation are defined in TS 25.104 [9], clause 6.4.2.1.

The minimum requirement for UTRA TDD 1,28 Mcps option operation is in TS 25.105 [10], clause 6.4.3.1

There is no power control dynamic range requirement for E-UTRA or NR operation.

6.3.3.3 Test purpose

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

6.3.3.4 Method of test

6.3.3.4.1 Initial conditions

6.3.3.4.1.1 General test conditions

Test environment:

– normal; see annex B.

RF channels to be tested:

– B, M and T; see clause 4.12.1.

6.3.3.4.1.2 UTRA FDD

Set each TAB connector to output a signal in accordance to TM2, in TS 25.141 [18], clause 6.1.1.2.

6.3.3.4.1.3 UTRA TDD

Set the initial parameters of the TAB connector transmitted signal according to table 6.3.3.4.1.3-1.

Operate the TAB connector in such a mode that it is able to interpret received TPC commands.

NOTE: The BS tester used for this test must have the ability:

– to analyze the output signal of the TAB connector under test with respect to code domain power, by applying the global in-channel Tx test method described in annex E of TS 25.142 [20];

– to simulate an UE with respect to the generation of TPC commands embedded in a valid UE signal.

Table 6.3.3.4.1.3-1: Parameters of the BS transmitted signal
for power control dynamic range test for 1,28 Mcps TDD

Parameter	Value/description
TDD Duty Cycle	TS i; i = 0, 1, 2, …, 6: transmit, if i is 0, 4,5,6; receive, if i is 1,2,3.
Time slots under test	TS4, TS5 and TS6
Number of DPCH in each time slot under test	1
Data content of DPCH	real life (sufficient irregular)

6.3.3.4.2 Procedure

6.3.3.4.2.1 General procedure

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

2) Set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (P_Rated,c,TABC)

6.3.3.4.2.1 UTRA FDD

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

2) Measure the code domain power of the code channel under test. Use the code domain power measurement method defined in annex E in TS 25.141 [18].

3) Set the code domain power of the DPCH under test to P_max,c,TABC – 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).

4) Measure the code domain power of the code channel under test.

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

5) For multi-band TAB connectors 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.

6.3.3.4.2.2 UTRA TDD

1) Configure the TAB connector transmitter unit to enable power control steps of size 1 dB.

2) Set the BS tester to produce a sequence of TPC commands related to the active DPCH, with content "Decrease Tx power". This sequence shall be sufficiently long so that the code domain power of the active DPCH is controlled to reach its minimum, and shall be transmitted to the AAS BS within the receive time slots TS i of the BS.

3) Measure the code domain power of the active DPCH over the 848 active chips of a transmit time slot TS i of the AAS BS (this excludes the guard period) by applying the global in-channel Tx test method described in annex E of TS 25.142 [20].

4) Set the BS tester to produce a sequence of TPC commands related to the active DPCH, with content "Increase Tx power". This sequence shall be sufficiently long so that the code domain power of the active DPCH is controlled to reach its maximum, and shall be transmitted to the AAS BS within the receive time slots TS i of the AAS BS.

5) Measure the code domain power of the active DPCH over the 848 active chips of a transmit time slot TS i of the AAS BS (this excludes the guard period) by applying the global in-channel Tx test method described in annex E in TS 25.142 [20].

6) Determine the power control dynamic range by calculating the difference between the maximum code domain power measured in step (5) and the minimum code domain power measured in step (7).

7) Configure the TAB connector transmitter to enable power control steps of 2 dB and of 3 dB, respectively, and repeat steps (4) to (8).

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

8) For multi-band TAB connectors 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.

6.3.3.5 Test requirements

6.3.3.5.1 UTRA FDD

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

Downlink (DL) power control dynamic range:

– maximum code domain power: TAB connector maximum output power (P_max,c,TABC) -4.1 dB or greater;

– minimum code domain power: TAB connector maximum output power (P_max,c,TABC) -26.9 dB or less.

6.3.3.5.2 UTRA TDD

For UTRA TDD 1,28 Mcps option the power control dynamic range derived according to clause 6.3.2.4 shall be greater than or equal to 29,7dB.

6.3.4 Total power dynamic range

6.3.4.1 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 TAB connector supporting transmission in the operating band.

NOTE 1: The upper limit of the dynamic range is the TAB connector maximum output power (P_Rated,c,TABC). The lower limit of the dynamic range is the lowest minimum power from the TAB connector when no traffic channels are activated.

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 TAB connector is the OFDM symbol power at maximum output power (P_Rated,c,TABC) when transmitting on all RBs. The lower limit of the dynamic range at a TAB connector 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.

6.3.4.2 Minimum requirement

The minimum requirement for UTRA FDD operation are defined in TS 25.104 [9], clause 6.4.3.1.

There is no total power dynamic range requirement for UTRA TDD 1,28 Mcps option operation.

The minimum requirement for E-UTRA operation is in TS 36.104 [11], clause 6.3.2.1.

The minimum requirement for NR operation is in TS 38.104 [36], clause 6.3.3.2.

6.3.4.3 Test purpose

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

6.3.4.4 Method of test

6.3.4.4.1 Initial conditions

6.3.4.4.1.1 General test conditions

Test environment: normal; see annex B.

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

6.3.4.4.1.2 UTRA FDD

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

Set each TAB connector to output a signal in accordance to TM2, in TS 25.141 [18], clause 6.1.1.2.

6.3.4.4.1.3 E-UTRA

Set the Channel set-up of the TAB connector transmitted signal according to:

– E-TM3.1, or

– sE-TM3.1-1 for subslot TTI, or

– sE-TM3.1-2 for slot TTI.

6.3.4.4.1.4 NR

Set the Channel set-up of the TAB connector transmitted signal according to:

– NR-FR1-TM3.1b if 1024QAM is supported by BS without power back off, or

– NR-FR1-TM3.1a if 1024QAM is not supported by BS without power back off but 256QAM is supported by BS without power back off, or

– NR-FR1-TM3.1 if 1024QAM and 256QAM are both not supported by BS without power back off.

6.3.4.4.2 Procedure

6.3.4.4.2.1 General procedure

The minimum requirement is applied to all TAB connectors, they may be tested one at a time or multiple TAB connectors may be tested in parallel as shown in annex D.1.1. Whichever method is used the procedure is repeated until all TAB connectors necessary to demonstrate conformance have been tested.

1) Connect TAB connector to measurement equipment as shown in annex D.1.1. All TAB connectors not under test shall be terminated.

2) Set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (P_Rated,c,TABC).

6.3.4.4.2.2 UTRA FDD

The downlink total dynamic range is computed as the difference of the maximum carrier output power, measured as defined in step 3 in clause 6.2.2.4.3 and the carrier power measured at step 3 of the Error Vector Magnitude test, as described in clause 6.5.4.4.2.1.

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

6.3.4.4.2.3 E-UTRA

1) Measure the average OFDM symbol power as defined in annex F of TS 36.141 [17].

2) Set the TAB connector to transmit a signal according to the same selection as in subcluase 6.3.4.4.1.3:

– E-TM2, or

– sE-TM2-1 for subslot TTI, or

– sE-TM2-2 for slot TTI.

3) Measure the average OFDM symbol power as defined in annex F of TS 36.141 [17]. The measured OFDM symbols shall not contain RS, PBCH or synchronisation signals.

4) If BS supports 256QAM, set the channel set-up of the TAB connector 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 1. Set the TAB connector to transmit a signal according to E-TM2a (or sE-TM2a-1 for subslot TTI, or sE-TM2a-2 for slot TTI) and repeat step 3.

5) If BS supports 1024QAM, set the channel set-up of the TAB connector transmitted signal according to E-TM3.1b and repeat step 1. Set the TAB connector to transmit a signal according to E-TM2b and repeat step 3.

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

6.3.4.4.2.4 NR

1) Measure the average OFDM symbol power as defined in annex D in TS 38.141-1 [37].

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

– NR-FR1-TM2b if 1024QAM is supported by BS, or

– NR-FR1-TM2a if 1024QAM is not supported by BS and 256QAM is supported by BS, or;

– NR-FR1-TM2 if 1024QAM and 256QAM are both not supported by BS;

3) Measure the average OFDM symbol power as defined in annex D in TS 38.141-1 [37].

The measured OFDM symbols shall not contain RS or SSB.

In addition, for multi-band connectors, the following steps shall apply:

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

6.3.4.5 Test requirements

6.3.4.5.1 UTRA FDD

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

6.3.4.5.2 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 6.3.4.5.1-1.

Table 6.3.4.5.2-1 E-UTRA TAB connector 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 6.5.4.

6.3.4.5.3 NR

The downlink (DL) total power dynamic range for each NR carrier shall be larger than or equal to the level in table 6.3.4.5.3-1.

Table 6.3.4.5.3-1: NR TAB connector total power dynamic range

NR 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 2: Additional test requirements for the Error Vector Magnitude (EVM) at the lower limit of the dynamic range are defined in clause 6.5.4.

6.3.5 IPDL time mask

6.3.5.1 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 of the TAB connector output power during these idle periods.

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

6.3.5.2 Minimum requirement

The minimum requirement for UTRA FDD operation are defined in TS 25.104 [9], clause 6.4.5.1.

There is no IPDL requirement for UTRA TDD 1,28 Mcps option operation.

There is no IPDL requirement for E-UTRA or NR operation.

6.3.5.3 Test purpose

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

6.3.5.4 Method of test

6.3.5.4.1 Initial conditions

Test environment:

– normal; see annex B.

RF channels to be tested:

– B, M and T; see clause 4.12.1.

Set each TAB connector to output a signal in accordance to TM1, in clause 4.12.2.

Configure the TAB connector 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

6.3.5.4.2 Procedure

1) Connect TAB connector to measurement equipment as shown in clause D.1.1. All TAB connectors not under test shall be terminated.

2) Set the TAB connector to transmit at manufacturers declared rated carrier output power per TAB connector (P_Rated,c,TABC).

3) Measure the mean power at the TAB connector over a period starting 27 chips after the beginning of the IPDL period and ending 27 chips before the expiration of the IPDL period.

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

4) For multi-band TAB connectors 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.

6.3.5.5 Test requirements

The mean power measured according to step (3) in clause 6.3.5.4.2 shall be equal to or less than

TAB connector maximum output power (P_max,c,TABC) – 34.3 dB.

6.3.6 RE Power control dynamic range

6.3.6.1 Definition and applicability

The RE power control dynamic range is the difference between the power of an RE and the average RE power for a TAB connector at maximum output power (P_Rated,c,TABC) for a specified reference condition.

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

6.3.6.2 Minimum requirement

There is no RE Power control dynamic range requirement for UTRA FDD operation.

There is no RE Power control dynamic range requirement for UTRA TDD 1,28 Mcps option operation.

The minimum requirement for E-UTRA operation are defined in TS 36.104 [11], clause 6.3.1.1.

The minimum requirement for NR operation are defined in TS 38.104 [36], clause 6.3.2.2.

6.3.6.3 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 6.5.4 provides sufficient test coverage for this requirement.