6.2 Base station output power

25.1413GPPBase Station (BS) conformance testing (FDD)Release 17TS

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

6.2.1 Base station maximum output power

6.2.1.1 Definition and applicability

In certain regions, the minimum requirement for normal conditions may apply also for some conditions outside the ranges defined for the Normal test environment in clause 4.4.1.

The rated output power, Prated,c, of the BS shall be as specified in Table 6.8AA.

Table 6.8AA: Base Station rated output power

BS class	Prated,c
Wide Area BS	– (note)
Medium Range BS	< +38 dBm
Local Area BS	< + 24 dBm
Home BS	< + 20 dBm (without transmit diversity or MIMO) < + 17 dBm (with transmit diversity or MIMO mode with two transmlt antennas) < + 14 dBm (with MIMO mode with four transmit antennas)
NOTE: There is no upper limit required for the rated output power of the Wide Area Base Station like for the base station for General Purpose application in Release 99, 4, and 5.

6.2.1.2 Minimum Requirement

The minimum requirement is in TS 25.104 [1] clause 6.2.1.

6.2.1.3 Test purpose

The test purpose is to verify the accuracy of the maximum output power across the frequency range and under normal and extreme conditions for all transmitters in the BS.

6.2.1.4 Method of test

6.2.1.4.1 Initial conditions

Test environment: normal; see clause 4.4.1.

RF channels to be tested for single carrier: B, M and T; see clause 4.8.

Base Station RF Bandwidth positions to be tested for multi-carrier: B_RFBW, M_RFBW and T_RFBW in single band operation; B_RFBW_T’_RFBW and B’_RFBW_T_RFBW in multi-band operation; see subclause 4.8.1.

In addition, for only one UARFCN or Base Station RF Bandwidth position, the test shall be performed under extreme power supply as defined in clause 4.4.4

NOTE: Tests under extreme power supply also test extreme temperature.

1) Connect the power measuring equipment to the base station antenna connector.

6.2.1.4.2 Procedure

1) For a BS declared to be capable of single carrier operation only, set the BS to transmit a signal in accordance to TM1, clause 6.1.1.1, at manufacturer’s declared rated output power, Prated,c.

For a BS declared to be capable of multi-carrier operation, set the base station to transmit according to TM1 on all carriers configured using the applicable test configuration and corresponding power setting specified in sub-clause 4.12.

2) Measure the mean power for each carrier, Pout, at the BS antenna connector.

In addition, for a multi-band capable BS, the following step shall apply:

3) For multi-band capable BS 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. For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of single-band or multi-band test shall be terminated.

6.2.1.5 Test Requirements

In normal conditions, the measurement result in step 2 of 6.2.1.4.2 shall remain:

within +2.7 dB and -2.7 dB of the manufacturer’s rated output power, Prated,c, for carrier frequency f ≤ 3.0 GHz,

within +3.0 dB and –3.0 dB of the manufacturer’s rated output power, Prated,c, for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

In extreme conditions, measurement result in step 2 of 6.2.1.4.2 shall remain:

within +3.2 dB and -3.2 dB of the manufacturer’s rated output power, Prated,c, for carrier frequency f ≤ 3.0 GHz,

within +3.5 dB and –3.5 dB of the manufacturer’s rated output power, Prated,c, for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

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 4.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex F.

6.2.2 Primary CPICH power accuracy

6.2.2.1 Definition and applicability

Primary CPICH (P-CPICH) power is the code domain power of the Primary Common Pilot Channel. P-CPICH power is indicated on the BCH. The requirement is applicable for all BS types.

6.2.2.2 Minimum Requirement

The minimum requirement is in TS 25.104 [1] clause 6.4.4.

6.2.2.3 Test purpose

The purpose of the test is to verify, that the BS under test delivers Primary CPICH code domain power within margins, thereby allowing reliable cell planning and operation.

6.2.2.4 Method of test

6.2.2.4.1 Initial conditions

Test environment: normal; see clause 4.4.1.

RF channels to be tested: B, M and T; see clause 4.8

1) Connect BS to code domain analyser as shown in annex B.1.2.

2) Disable inner loop power control.

3) Set the BS to transmit a signal in accordance to TM2, clause 6.1.1.2, at manufacturer’s declared rated output power, Prated,c. In case of transmit diversity or MIMO transmission the configured Primary CPICH code domain power per antenna connector shall be declared by the manufactuer.

6.2.2.4.2 Procedure

– Measure the P-CPICH power in one timeslot according to annex E.

In addition, for a multi-band capable BS, the following step shall apply:

1) For multi-band capable BS and single band tests, repeat the steps above per involved band where single carrier test models shall apply with no carrier activated in the other band. For multi-band capable BS with separate antenna connector, the antenna connector not being under test shall be terminated.

6.2.2.5 Test Requirement

The measured P-CPICH code domain power shall be:

within ±2.9 dB of the configured absolute value for carrier frequency f ≤ 3.0 GHz

within +3.2 dB and –3.2 dB of the configured absolute value for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

6.2.3 Secondary CPICH power offset accuracy

6.2.3.1 Definition and applicability

Secondary CPICH (S-CPICH) power is the code domain power of the Secondary Common Pilot Channel. S-CPICH power is equal to the sum of the P-CPICH power and the power offset, which are signalled to the UE. The power offset for MIMO mode is signalled in the IE “Power Offset for S-CPICH for MIMO”, defined in section 10.3.6.41b in TS 25.331. The requirement is applicable for BS supporting MIMO operation. If the manufacturer declares the implementation of a Virtual Antenna Mapping (VAM), then this test will not be performed.

For MIMO mode with four transmit antennas, the power offset of S-CPICH on antenna 2 is signalled in the IE “Power Offset for S-CPICH for MIMO mode with four transmit antennas on Antenna2” as defined in section 10.3.6.143 in TS 25.331 [11]. The power offset of S-CPICH on antenna 3 and 4 is signalled in the IE “Common Power Offset for S-CPICH for MIMO mode with four transmit antennas on Antenna 3 and 4”, as defined in section 10.3.6.143 in TS 25.331.

6.2.3.2 Minimum Requirement

The minimum requirement is in TS 25.104 [1] clause 6.4.4A.1 for MIMO mode and in subclause 6.4.4A.2 for MIMO mode with four transmit antennas.

6.2.3.3 Test purpose

The purpose of the test is to verify, that the BS under test delivers the advertised power offset for S-CPICH power within margins, thereby allowing reliable MIMO HS-DSCH demodulation and CQI reporting.

6.2.3.4 Method of test for MIMO mode

6.2.3.4.1 Initial conditions

Test environment: normal; see clause 4.4.1.

RF channels to be tested: B, M and T; see clause 4.8

1) Connect BS to code domain analyser as shown in annex B.1.2. Figure B.2A.

2) Disable inner loop power control.

3) Set the BS to transmit a signal in accordance to TM2, clause 6.1.1.2, at manufacturer’s declared rated output power, Prated,c. The configured Primary CPICH code domain power intended per antenna connector shall be declared by the manufacturer.

4) The same BS set up is applied on both the antenna connectors.

6.2.3.4.2 Procedure

– During the same timeslot:

1) Measure the P-CPICH power, according to annex E on first antenna connector.

2) Measure the P-CPICH power, according to annex E on second antenna connector.

In addition, for a multi-band capable BS, the following step shall apply:

3) For multi-band capable BS and single band tests, repeat the steps above per involved band where single carrier test models shall apply with no carrier activated in the other band. For multi-band capable BS with separate antenna connector, the antenna connector not being under test shall be terminated.

6.2.3.4A Method of test for MIMO mode with four transmit antennas

6.2.3.4A.1 Initial conditions

Test environment: normal; see subclause 4.4.1.

RF channels to be tested: B, M and T; see subclause 4.8

1) Connect BS to code domain analyser analyser as shown in annex B.1.2. Figure B.2A.

2) Disable inner loop power control.

3) Set-up BS transmission at manufacturer’s declared rated output power per carrier, Prated,c. Channel set-up shall be according to TM2 subclause 6.1.1.2. Primary CPICH code domain power intended per antenna connector shall be declared by the manufactuer.

4) The same BS set up is applied on antenna connectors 1, 2, 3, 4.

6.2.3.4A.2 Procedure

a) Measure the P-CPICH power, on first antenna connector.

b) Measure the P-CPICH power, on second antenna connector.

c) Measure the P-CPICH power, on third antenna connector.

d) Measure the P-CPICH power, on fourth antenna connector.

6.2.3.5 Test Requirement for MIMO mode

The difference between measured P-CPICH power on two different antenna connectors shall be:

within ±2.7 dB for carrier frequency f ≤ 3.0 GHz,

within ±3.0 dB for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

6.2.3.5A Test Requirement for MIMO mode with four transmit antennas

The difference between measured P-CPICH powers on any two different antenna connectors shall be:

within ±2.7 dB for carrier frequency f ≤ 3.0 GHz,

within ±3.0 dB for carrier frequency 3.0 GHz < f ≤ 4.2 GHz.

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 subclause 4.2 and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance is given in Annex F.