6.2 Base station output power

37.1053GPPActive Antenna System (AAS) Base Station (BS) transmission and receptionRelease 17TS

6.2.1 General

The configured carrier power is the target maximum power for a specific carrier for the operating mode set in the BS within the limits given by the manufacturer’s declaration.

6.2.2 Maximum output power

6.2.2.1 General

The rated carrier output power of the AAS BS shall be as specified in table 6.2.2.1-1.

Table 6.2.2.1-1: AAS BS rated output power limits for BS classes

AAS BS class

PRated,c,sys

PRated,c,TABC

Wide Area BS

(NOTE)

(NOTE)

Medium Range BS

≤ 38 dBm +10log(NTXU,counted)

≤ 38dBm

Local Area BS

≤ 24 dBm +10log(NTXU,counted)

≤ 24dBm

NOTE: There is no upper limit for the PRated,c,sys or PRated,c,TABC of the Wide Area Base Station.

6.2.2.2 Minimum requirement for MSR operation

6.2.2.2.1 General

In normal conditions, Pmax,c,TABC shall remain within +2 dB and -2 dB of the configured carrier power for each TAB connector as declared by the manufacturer.

In extreme conditions, Pmax,c,TABC shall remain within +2,5 dB and -2,5 dB of the configured carrier power for each TAB connector as declared by the manufacturer.

In certain regions, the minimum requirement for normal conditions may apply also for some conditions outside the range of conditions defined as normal.

6.2.2.2.2 Additional requirements (regional)

6.2.2.3 Minimum requirement for single RAT UTRA operation

The minimum requirement for single RAT UTRA BS is the same as that defined in subclause 6.2.2.2.

6.2.2.4 Minimum requirement for single RAT E-UTRA operation

6.2.2.4.1 General

The minimum requirement for single RAT E-UTRA BS is the same as that defined in subclause 6.2.2.2.

6.2.2.4.2 Additional requirements (regional)

6.2.3 UTRA FDD primary CPICH power

6.2.3.1 General

This requirement applies to the TAB connector group(s) transmitting primary CPICH.

Primary CPICH (P-CPICH) power is the code domain power of the Primary Common Pilot Channel summed over the TAB connectors transmitting the P-CPICH for a cell. P-CPICH power is indicated on the BCH.

NOTE 1: A TAB connector group may comprise all TAB connectors.

NOTE 2: A TAB connector may be mapped to several groups.

NOTE 3: The manufacturer declares the TAB connector mapping to the P-CPICH transmission group(s) as specified in TS 37.145-1 [29] or TS 37.145-2 [30].

6.2.3.2 Minimum requirement for MSR operation

The minimum requirement for MSR UTRA FDD operation is the same as that defined in subclause 6.2.3.3. There is no CPICH power requirement for UTRA TDD 1,28 Mcps operation.

There is no CPICH power requirement for E-UTRA operation.

There is no CPICH power requirement for NR operation.

6.2.3.3 Minimum requirement for single RAT UTRA operation

The difference between the P-CPICH power and the P-CPICH power indicated on the BCH shall be within ±2,1 dB.

Alternatively, the P-CPICH power measured at each TAB connector shall be within ±2,1dB of the P-CPICH power level indicated on the BCH multiplied by a TAB connector specific beamforming weight. Beamforming weights on P‑CPICH are set by the AAS BS to achieve an intended radiated pattern.

There is no P-CPICH power requirement for UTRA TDD 1,28 Mcps operation.

6.2.3.4 Minimum requirement for single RAT E-UTRA operation

There is no CPICH power requirement for E-UTRA AAS BS.

6.2.4 UTRA TDD primary CCPCH power

6.2.4.1 General

This requirement applies to the TAB connector group(s) transmitting primary CCPCH. It comprises primary CCPCH (PCCPCH) absolute power accuracy, and differential accuracy.

Primary CCPCH power is the code domain power of the primary common control physical channel averaged over the transmit timeslot and summed over the TAB connectors transmitting the PCCPCH for a cell. Primary CCPCH power is signalled over the BCH.

The differential accuracy of the Primary CCPCH power is the relative transmitted power accuracy of PCCPCH in consecutive frames when the nominal PCCPCH power is not changed.

NOTE 1: A TAB connector group may comprise all TAB connectors.

NOTE 2: A TAB connector may be mapped to several groups.

NOTE 3: The manufacturer declares the TAB connector mapping to the PCCPCH transmission group(s).

6.2.4.2 Minimum requirement for MSR operation

The minimum requirement for MSR UTRA TDD 1,28 Mcps operation is the same as that defined in subclause 6.2.4.3.

There is no CCPCH power requirement for UTRA FDD operation.

There is no CCPCH power requirement for E-UTRA operation.

There is no CCPCH power requirement for NR operation.

6.2.4.3 Minimum requirement for single RAT UTRA operation

For UTRA TDD 1,28 Mcps operation, the difference between the BCH-broadcast value of the Primary CCPCH power and the Primary CCPCH power averaged over the timeslot shall not exceed the values in table 6.2.4.3-1. The requirement is a function of the output power from the TAB connector group transmitting PCCPCH averaged over the transmit timeslot, Pout, and the manufacturer’s rated total power of the group, Prated,t,group.

Table 6.2.4.3-1: Difference between Primary CCPCH power and the broadcast value

Output power in slot (dB)

PCCPCH power tolerance

Prated,t,group – 3 < Pout ≤ Prated,t,group +2

±2,5 dB

Prated,t,group – 6 < Pout ≤ Prated,t,group -3

±3,5 dB

Prated,t,group – 13 < Pout ≤ Prated,t,group -6

±5 dB

NOTE: Prated,t,group is the power sum of Prated,t,TABC of all the TAB connectors in the group transmitting PCCPCH.

The differential accuracy of PCCPCH power shall be within ± 0,5 dB.

Alternatively, the PCCPCH power measured at each TAB connector and averaged over the timeslot shall be within the tolerance indicated in table 6.2.4.3-1 of the PCCPCH power level indicated on the BCH that is multiplied by a TAB connector specific beamforming weight. Beamforming weights on PCCPCH are set by the AAS BS to achieve an intended radiated pattern.

In this case, the differential accuracy of PCCPCH power shall be within +/- 0.5 dB on each TAB connector in the TAB connector group.

There is no PCCPCH power requirement for UTRA FDD operation.

6.2.4.4 Minimum requirement for single RAT E-UTRA operation

There is no CCPCH power requirement for E-UTRA operation.

6.2.5 UTRA FDD additional CPICH power for MIMO mode

6.2.5.1 General

This clause includes requirements on secondary CPICH power level, for two and four TAB connector groups, as well as Demodulation CPICH requirements. The requirements apply to all TAB connector groups associated with UTRA FDD MIMO transmission as "antenna 2", "antenna 3" or "antenna 4" in the AAS BS.

The concept of "antenna 2", "antenna 3" and "antenna 4" is described in 3GPP TS 25.104 [2]. The group(s) of TAB connectors mapped to P-CPICH transmission represents "antenna 1".

NOTE 1: The manufacturer declares the mapping of TAB connectors to "antenna 1", "antenna 2", "antenna 3" and "antenna 4" (as defined in 3GPP TS 25.331 [16]) where applicable for AAS BS capable of UTRA FDD operation. The required declarations are specified in TS 37.145-1 [29] and TS 37.145-2 [30].

For UTRA FDD AAS BS operating only "antenna 1" and "antenna 2", the secondary CPICH (S-CPICH) power is the code domain power of the Secondary Common Pilot Channel. S-CPICH power is equal to the (dB) sum of the P‑CPICH power and the power offset, which are signalled to the UE. The power offset is signalled in the IE "Power Offset for S-CPICH for MIMO", for MIMO mode as defined in clause 10.3.6.41b in 3GPP TS 25.331 [16].

When the UE supports MIMO mode with four BS 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 subclause 10.3.6.143 in 3GPP TS 25.331 [16]. 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 Antenna3 and 4", as defined in subclause 10.3.6.143 in 3GPP TS 25.331 [16].

Demodulation CPICH (D-CPICH) power is the code domain power of the Demodulation Common Pilot Channel. D‑CPICH power is equal to the (dB) sum of the P-CPICH power and the power offset, which are signalled to the UE. The power offset of D-CPICH on antenna 3 and 4 is signalled in the IE "Common Power Offset for D-CPICH for MIMO mode with four transmit antennas on Antenna3 and 4", as defined in subclause 10.3.6.143 in 3GPP TS 25.331 [16].

NOTE 2: The accuracy level of the power offset for S-CPICH may affect both MIMO HS-DSCH demodulation and CQI reporting performance.

NOTE 3: The accuracy level of the power offset for D-CPICH transmitted on antennas 3 and 4 may affect both MIMO HS-DSCH demodulation and CQI reporting performance.

NOTE 4: At high geometry level PDSCH performance may be affected if D-CPICH is not scheduled.

NOTE 5: A TAB connector group may comprise all TAB connectors.

NOTE 6: A TAB connector may be mapped to several groups.

6.2.5.2 Minimum requirement for MSR operation

The minimum requirements for MSR UTRA FDD operation are the same as those defined in subclause 6.2.5.3.

There is no CPICH power requirement for UTRA TDD 1,28 Mcps operation.

There is no CPICH power requirement for E-UTRA operation.

There is no CPICH power requirement for NR operation.

6.2.5.3 Minimum requirement for single RAT UTRA operation

When operating MIMO only "antenna 1" and "antenna 2";

The difference between the P-CPICH power transmitted at the group of TAB connectors mapped to "antenna 1", and the S-CPICH power transmitted at the corresponding group of TAB connectors mapped to "antenna 2" shall be within ±2 dB of the IE "Power Offset for S-CPICH for MIMO".

Alternatively, the measured power of the P-CPICH mapped to "antenna 1" and the measured power of the S-CPICH mapped to "antenna 2" at each TAB connector shall be within 2 dB of the corresponding IE "Power Offset for S-CPICH for MIMO" that is multiplied by a TAB connector specific beamforming weight and the P-CPICH power level indicated on the BCH. The same beamforming weights applied to P-CPICH and S-CPICH are set by the AAS BS to achieve an intended radiated pattern.

When operating MIMO "antenna 1", "antenna 2", "antenna 3", and "antenna 4".

The difference between the P-CPICH power transmitted at the group of TAB connectors mapped to "antenna 1", and the S-CPICH power transmitted at the corresponding group of TAB connectors mapped to "antenna 2"shall be within ±2 dB of the IE "Power Offset for S-CPICH for MIMO mode with four transmit antennas on Antenna2".

The difference between the P-CPICH power transmitted at the group of TAB connectors mapped to "antenna 1" and the S-CPICH power transmitted at the corresponding groups of TAB connectors mapped to "antenna 3" and "antenna 4" respectively, shall be within ±2 dB of the IE "Common Power Offset for S-CPICH for MIMO mode with four transmit antennas on Antenna3 and 4".

Alternatively, the measured power of the P-CPICH mapped to "antenna 1" and the measured power of the S-CPICH mapped to "antenna 2" at each TAB connector shall be within ±2 dB of the corresponding IE "Power Offset for S‑CPICH for MIMO mode with four transmit antennas on Antenna2" that is multiplied by a TAB connector specific beamforming weight and the P-CPICH power level indicated on the BCH. The measured power of the P-CPICH mapped to "antenna 1" and the measured power of the S-CPICH mapped to "antenna 3" and "antenna 4", respectively, at each TAB connector shall be within ±2 dB of the corresponding IE "Power Offset for S-CPICH for MIMO mode with four transmit antennas on Antenna3 and 4" that is multiplied by a TAB connector specific beamforming weight and the P-CPICH power level indicated on the BCH. The same beamforming weights applied to P-CPICH and S-CPICH are set by the AAS BS to achieve an intended radiated pattern.

If D-CPICH is scheduled:

The difference between the P-CPICH power transmitted at the group of TAB connectors mapped to "antenna 1" and the D-CPICH power transmitted at the corresponding groups of TAB connectors mapped to "antenna 3" and "antenna 4" respectively, shall be within ±2 dB of the IE "Common Power Offset for D-CPICH for MIMO mode with four transmit antennas on Antenna3 and 4".

Alternatively, the measured power of the P-CPICH mapped to "antenna 1" and the measured power of the D-CPICH mapped to "antenna 3" and "antenna 4", respectively, at each TAB connector shall be within ±2 dB of the corresponding IE "Common Power Offset for D-CPICH for MIMO mode with four transmit antennas on Antenna3 and 4" that is multiplied by a TAB connector specific beamforming weight and the P-CPICH power level indicated on the BCH. The same beamforming weights applied to P-CPICH and D-CPICH are set by the AAS BS to achieve an intended radiated pattern.

There is no CPICH power requirement for UTRA TDD 1,28 Mcps operation.

6.2.5.4 Minimum requirement for single RAT E-UTRA operation

There is no CPICH power requirement for E-UTRA AAS BS.

6.2.6 E-UTRA DL RS power

6.2.6.1 General

This requirement applies to the TAB connector group(s) transmitting primary DL RS.

The DL RS power is the resource element power of the Downlink Reference Symbol summed over the group of TAB connectors transmitting the DL RS for a cell.

The absolute DL RS power is indicated on the DL-SCH. The absolute accuracy is defined as the maximum deviation between the DL RS power indicated on the DL-SCH and the DL RS power of each E-UTRA carrier.

NOTE 1: A TAB connector group may comprise all TAB connectors.

NOTE 2: A TAB connector may be mapped to several groups.

NOTE 3: The manufacturer declares the TAB connector mapping to the DL RS transmission group(s).

6.2.6.2 Minimum requirement for MSR operation

There is no DL RS power requirement for UTRA operation.

There is no DL RS power requirement for NR operation.

The minimum requirement for MSR E-UTRA operation is the same as that defined in subclause 6.2.6.4.

6.2.6.3 Minimum requirement for single RAT UTRA operation

There is no DL RS power requirement for UTRA operation.

6.2.6.4 Minimum requirement for single RAT E-UTRA operation

The DL RS power of each E-UTRA carrier shall be within ±2,1 dB of the DL RS power indicated on the DL-SCH.

Alternatively, the DL RS power measured at each TAB connector shall be within ±2,1dB of the DL RS power level indicated on the DL-SCH multiplied by a TAB connector specific beamforming weight. Beamforming weights on P-CPICH are set by the AAS BS to achieve an intended radiated pattern.