6.2 Base station output power

36.1043GPPBase Station (BS) radio transmission and receptionEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18TS

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

Output power, Pout, of the base station is the mean power of one carrier delivered to a load with resistance equal to the nominal load impedance of the transmitter.

Rated total output power of the base station is the mean power for BS operating in single carrier, multi-carrier, or carrier aggregation configurations that the manufacturer has declared to be available at the antenna connector during the transmitter ON period.

Maximum output power (P_max,c) of the base station is the mean power level per carrier measured at the antenna connector during the transmitter ON period in a specified reference condition.

Rated output power, P_rated,c, of the base station is the mean power level per carrier for BS operating in single carrier, multi-carrier, or carrier aggregation configurations that the manufacturer has declared to be available at the antenna connector during the transmitter ON period.

NOTE: Different P_rated,c may be declared for different configurations.

NOTE: For NB-IoT in-band and guard band operation, the LTE carrier and NB-IoT carrier shall be seen as a single carrier occupied LTE channel bandwidth, the output power over this carrier is shared between LTE and NB-IoT. This note is applied for Pout, Rated total output power, Pmax,c and Prated,c.

The rated output power, P_rated,c, of the BS shall be as specified in Table 6.2-1.

Table 6.2-1: Base Station rated output power

BS class	P_rated,c
Wide Area BS	– (note)
Medium Range BS	< + 38 dBm
Local Area BS	< + 24 dBm
Home BS	< + 20 dBm (for one transmit antenna port) < + 17 dBm (for two transmit antenna ports) < + 14dBm (for four transmit antenna ports) < + 11dBm (for eight transmit antenna ports)
NOTE: There is no upper limit for the rated output power of the Wide Area Base Station.

In addition for Band 46 operation, the BS may have to comply with the applicable BS power limits established regionally, when deployed in regions where those limits apply and under the conditions declared by the manufacturer. The regional requirements may be in the form of conducted power, power spectral density, EIRP and other types of limits. In case of regulatory limits based on EIRP, assessment of the EIRP level is described in Annex H.

In addition for Band 49 operation in US, the BS EIRP power limit established by FCC for Category A CBSDs (Citizens Broadband Radio Service Devices) applies. Assessment of the EIRP level is described in Annex H.

In addition for Band 85 NB-IoT standalone operation, the BS rated output power limit of 43 dBm applies over the NB-IoT carriers in the range 728-729 MHz of the DL operating band. The BS output power limit of 43 dBm shall be considered as shared among all NB-IoT carriers in the 728-729 MHz frequency range or as the maximum value per NB-IoT carrier in the case where only one NB-IoT carrier is deployed in 728-729 MHz frequency range.

In addition for Band 103 NB-IoT standalone operation, the BS rated output power limit of 43 dBm applies over the NB-IoT carriers in the range 757-758 MHz of the DL operating band. The BS output power limit of 43 dBm shall be considered as shared among all NB-IoT carriers in the 757-758 MHz frequency range or as the maximum value per NB-IoT carrier in the case where only one NB-IoT carrier is deployed in 757-758 MHz frequency range.

6.2.1 Minimum requirement

In normal conditions, the base station maximum output power, P_max,c, shall remain within +2 dB and -2 dB of the rated output power, P_rated,c, declared by the manufacturer.

In extreme conditions, the base station maximum output power, P_max,c, shall remain within +2.5 dB and -2.5 dB of the rated output power, P_rated,c, 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 Additional requirement (regional)

For Band 34 operation in Japan, the rated output power, P_rated,c, declared by the manufacturer shall be less than or equal to the values specified in Table 6.2.2-1.

Table 6.2.2-1: Regional requirements for Band 34 for rated output power declared by the manufacturer.

Channel bandwidth BW_Channel [MHz]	1.4	3	5	10	15	20
Maximum output power P_max,c [W]	N/A	N/A	20	40	60	N/A

For Band 41 operation in Japan, the rated output power, P_rated,c, per BS declared by the manufacturer shall be less than or equal to the values specified in Table 6.2.2-2.

Table 6.2.2-2: Regional requirements for Band 41 for rated output power declared by the manufacturer.

Channel bandwidth BW_Channel [MHz]	1.4	3	5	10	15	20
Maximum output power P_max,c [W]	N/A	N/A	N/A	20	N/A	40

6.2.3 Home BS output power for adjacent UTRA channel protection

The E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS shall be capable of adjusting the transmitter output power to minimize the interference level on the adjacent channels licensed to other operators in the same geographical area while optimize the Home BS coverage. These requirements are only applicable to Home BS. The requirements in this clause are applicable for AWGN radio propagation conditions.

The output power, Pout, of the E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS shall be as specified in Table 6.2.3-1 under the following input conditions:

– CPICH Êc, measured in dBm, is the code power of the Primary CPICH on one of the adjacent channels present at the Home BS antenna connector for the CPICH received on the adjacent channels. If Tx diversity is applied on the Primary CPICH, CPICH Êc shall be the sum in [W] of the code powers of the Primary CPICH transmitted from each antenna.

– Ioh, measured in dBm, is the total received power density, including signals and interference but excluding the own Home BS signal, present at the Home BS antenna connector on the Home BS operating channel.

In case that both adjacent channels are licensed to other operators, the most stringent limit shall apply for Pout. In the case when one of the adjacent channels is licensed to an E-UTRA operator while the other adjacent channel is licensed to an UTRA operator, the more stringent limit of this clause and clause 6.2.4 shall apply for Pout. In case the Home BS’s operating channel and both adjacent channels are licensed to the same operator, the requirements of this clause do not apply.

The input conditions defined for the requirements in this clause are specified at the antenna connector of the Home BS. For Home BS receivers with diversity, the requirements apply to each antenna connector separately, with the other one(s) terminated or disabled. The requirements are otherwise unchanged. For Home BS(s) without measurement capability, a reference antenna with a gain of 0 dBi is assumed for converting these power levels into field strength requirements.

Table 6.2.3-1: Home BS output power for adjacent operator UTRA channel protection

Input Conditions

Output power, Pout

Ioh > CPICH Êc + 43 dB

And CPICH Êc ≥ -105dBm

≤ 10 dBm

Ioh ≤ CPICH Êc + 43 dB

and CPICH Êc ≥ -105dBm

≤ max(8 dBm, min(20 dBm, CPICH Êc + 100 dB))

Note 1: The Home BS transmitter output power specified in Table 6.2.3-1 assumes a Home BS reference antenna gain of 0 dBi, an target outage zone of 47dB around the Home BS for an UE on the adjacent channel, with an allowance of 2 dB for measurement errors, an ACIR of 33 dB, an adjacent channel UE CPICH Ec/Io target of -18 dB and the same CPICH Êc value at the adjacent channel UE as for the Home BS.

Note 2: For CPICH Êc < -105dBm, the requirements in clauses 6.2.1 and 6.2.2 apply.

Note 3: The output power Pout is the sum transmit power across all the antennas of the Home BS, with each transmit power measured at the respective antenna connectors.

6.2.4 Home BS output power for adjacent E-UTRA channel protection

The output power, Pout, of the E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS shall be as specified in Table 6.2. 4-1 under the following input conditions:

– CRS Ês, measured in dBm, is the Reference Signal Received Power per resource element on one of the adjacent channels present at the Home BS antenna connector for the Reference Signal received on the adjacent channels. For CRS Ês determination, the cell-specific reference signal R0 according TS 36.211 [3] shall be used. If the Home BS can reliably detect that multiple TX antennas are used for transmission on the adjacent channel, it may use the average in [W] of the CRS Ês on all detected antennas.

In case that both adjacent channels are licensed to other operators, the most stringent limit shall apply for Pout. In the case when one of the adjacent channels is licensed to an E-UTRA operator while the other adjacent channel is licensed to an UTRA operator, the more stringent limit of this clause and clause 6.2.3 shall apply for Pout. In case the E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS’s operating channel and both adjacent channels are licensed to the same operator, the requirements of this clause do not apply.

The input conditions defined for the requirements in this clause are specified at the antenna connector of the Home BS. For E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS receivers with diversity, the requirements apply to each antenna connector separately, with the other one(s) terminated or disabled. The requirements are otherwise unchanged. For Home BS(s) without measurement capability, a reference antenna with a gain of 0 dBi is assumed for converting these power levels into field strength requirements.

Table 6.2. 4-1: Home BS output power for adjacent operator E-UTRA channel protection

Input Conditions

Output power, Pout

Ioh > CRS Ês + + 30 dB

and CRS Ês ≥ -127dBm

≤ 10 dBm

Ioh ≤ CRS Ês + + 30 dB

and CRS Ês ≥ -127dBm

≤ max(8 dBm, min(20 dBm, CRS Ês + + 85 dB))

Note 1: The E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS transmitter output power specified in Table 6.2. 4-1 assumes a Home BS reference antenna gain of 0 dBi, an target outage zone of 47dB around the Home BS for an UE on the adjacent channel, with an allowance of 2 dB for measurement errors, an ACIR of 30 dB, an adjacent channel UE Ês/Iot target of -6 dB and the same CRS Ês value at the adjacent channel UE as for the Home BS.

Note 2: For CRS Ês < -127dBm, the requirements in clauses 6.2.1 and 6.2.2 apply.

Note 3: The output power Pout is the sum transmit power across all the antennas of the Home BS, with each transmit power measured at the respective antenna connectors.

Note 4: is the number of downlink resource blocks in the own E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS channel.

Note 5: is the number of subcarriers in a resource block, .

6.2.5 Home BS Output Power for co-channel E-UTRA protection

To minimize the co-channel DL interference to non-CSG macro UEs operating in close proximity while optimizing the CSG Home BS coverage, E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS may adjust its output power according to the requirements set out in this clause. These requirements are only applicable to E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS. The requirements in this clause are applicable for AWGN radio propagation conditions.

For E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS that supports the requirements in this clause, the output power, Pout, of the Home BS shall be as specified in Table 6.2.5-1 under the following input conditions:

– CRS Ês, measured in dBm, is the Reference Signal Received Power per resource element present at the Home BS antenna connector received from the co-channel Wide Area BS. For CRS Ês determination, the cell-specific reference signal R0 according TS 36.211 [10] shall be used. If the Home BS can reliably detect that multiple TX antenna ports are used for transmission by the co-channel Wide Area Base Station, it may use the average in [W] of the CRS Ês on all detected TX antenna ports, including R0.

– Ioh, measured in dBm, is the total received DL power, including all interference but excluding the own Home BS signal, present at the Home BS antenna connector on the Home BS operating channel.

– Iob, measured in dBm, is the uplink received interference power, including thermal noise, within one physical resource block’s bandwidth of resource elements as defined in TS 36.214, present at the Home BS antenna connector on the Home BS operating channel.

The input conditions defined for the requirements in this clause are specified at the antenna connector of the Home BS. For E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS receivers with diversity, the requirements apply to each antenna connector separately, with the other one(s) terminated or disabled. The requirements are otherwise unchanged. For E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS(s) without measurement capability, a reference antenna with a gain of 0 dBi is assumed for converting these power levels into field strength requirements.

Table 6.2.5-1: Home BS output power for co-channel E-UTRA channel protection

Input Conditions

Output power, Pout

Ioh (DL) > CRS Ês + 10log₁₀() + 30 dB

and

Option 1: CRS Ês ≥ -127 dBm or

Option 2: CRS Ês ≥ -127 dBm and Iob > -103 dBm

≤ 10 dBm

Ioh (DL) ≤ CRS Ês + 10log₁₀() + 30 dB

and

Option 1: CRS Ês ≥ -127 dBm or

Option 2. CRS Ês ≥ -127 dBm and Iob > -103 dBm

≤ max (Pmin, min (P_max,c CRS Ês + 10log₁₀() + X ))

30 dB ≤ X ≤ 70 dB

Pmin = – 10 dBm

Note 1: Only the option supported by the E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS shall be tested.

Note 2: For CRS Ês < -127dBm, or Iob ≤ -103 dBm when Option 2 is supported, the requirements in clauses 6.2.1 and 6.2.2 apply.

Note 3: The output power, Pout, is the sum of transmits power across all the antennas of the Home BS, with each transmit power measured at the respective antenna connectors.

Note 4: is the number of downlink resource blocks in the own E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS channel.

Note 5: is the number of subcarriers in a resource block, .

Note 6: X is a network configurable parameter.

Note 7: Pmin can be lower dependent on the E-UTRA or E-UTRA with NB-IoT or NB-IoT Home BS total dynamic range.

Note 8: Other input conditions and output power to be applied for network scenarios other than co-channel E-UTRA macro channel protection shall not be precluded.