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Power Configuration - Huawei

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Reference Signal Receive Power
RSRE Power = Psingle port-10*log(12*Nrb)+10*log(1+Pb)
Where ; PSingle Port = PRRU - 10*log(Nport)
Pb is Power Bosting

ρB/ ρA
PB
Single Antenna Port 2 or 4 Antenna Port
0 1 5/4

1 4/5 1

2 3/5 ¾

3 2/5 ½

PB PA Impact on Radio Network

Performance:
0 0 A larger value of Pb results in a larger
increase in ReferenceSignalPwr, better
channel estimation performance, and
1 -3 better PDSCH demodulation
performance, but it also leads to lower
transmit power of the PDSCH (type B)

2 -4.77 and thus increases

3 -6

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2

RRU Technical Description L1800
BW 10 Mhz
Total
RRU 3952 (for L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
3952 L1800 40 2 18.2 0 0 40
3952 L1800 40 2 21.2 1 -3 40
3952 L1800 40 2 23 2 -4.77 40
3952 L1800 40 2 24.5 3 -6 40

PA1 PA2

Configuration Scenario Number of Output Output

Number of
(Total Number of Carriers) LTE FDD Power per Power per
LTE FDD LTE FDD LTE FDD
Carriers Carriers
Carrier (W) Carrier (W)

Assumption :
LTE FDD 1 (MIMO) 1 40 1 40
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3

RRU Technical Description L1800
BW 10 Mhz
Total
RRU 3953 (for L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
3953 L1800 60 2 20 0 0 60
3953 L1800 60 2 23 1 -3 60
3953 L1800 60 2 24.7 2 -4.77 60
3953 L1800 60 2 26 3 -6 60

PA1 PA2

Configuration Scenario Number of Output Output

Number of
(Total Number of Carriers) LTE FDD Power per Power per
LTE FDD LTE FDD LTE FDD
Carriers Carriers
Carrier (W) Carrier (W)

Assumption :
LTE FDD 1 (MIMO) 1 60 1 60
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4

RRU Technical Description L1800
BW 10 Mhz
Total
RRU 3959 (for L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
3959 L1800 40 2 18.2 0 0 40
3959 L1800 40 2 21.2 1 -3 40
3959 L1800 40 2 23 2 -4.77 40
3959 L1800 40 2 24.5 3 -6 40

PA1 PA2

Configuration Scenario Number of Output Output

Number of
(Total Number of Carriers) LTE FDD Power per Power per
LTE FDD LTE FDD LTE FDD
Carriers Carriers
Carrier (W) Carrier (W)

Assumption :
LTE FDD 1 (MIMO) 1 40 1 40
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5

RRU Technical Description L1800
BW 10 Mhz
Total
RRU 3936 (for L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
3936 L1800 40 1 18.2 0 0 40
3936 L1800 40 1 21.2 1 -3 40
3936 L1800 40 1 23 2 -4.77 40
3936 L1800 40 1 24.5 3 -6 40

PA1

Configuration Scenario Number of Output

(Total Number of Carriers) LTE FDD Power per
Carriers LTE FDD
Carrier (W)

Assumption :
LTE FDD 1 (MIMO) 1 40
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6

RRU Technical Description L1800
BW 10 Mhz
Total
RRU 3939 (for L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
3939 L1800 40 2 18.2 0 0 40
3939 L1800 40 2 21.2 1 -3 40
3939 L1800 40 2 23 2 -4.77 40
3939 L1800 40 2 24.5 3 -6 40

PA1 PA2

Configuration Scenario Number of Output Output

Number of
(Total Number of Carriers) LTE FDD Power per Power per
LTE FDD LTE FDD LTE FDD
Carriers Carriers
Carrier (W) Carrier (W)

Assumption :
LTE FDD 1 (MIMO) 1 40 1 40
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7

RRU Technical Description L1800
BW 10 Mhz
Total
MRFU V2 (L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
MRFU v2 L1800 40 1 18.2 0 0 40
MRFU v2 L1800 40 1 21.2 1 -3 40
MRFU v2 L1800 40 1 23 2 -4.77 40
MRFU v2 L1800 40 1 24.5 3 -6 40
PA1

Configuration Scenario Number of Output

(Total Number of Carriers) LTE FDD Power per
Carriers
LTE FDD Assumption :
Carrier (W)
GSM Power =
20 Watt with
LTE FDD 1 (MIMO) 1 40
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8

RRU Technical Description L1800
BW 10 Mhz
Total
AAU 3940 (L1800) Capacity RRU/Carrier Port RS Power Power
RRU Type Purposes (Watt) Number (dBm) PB PA Consump
tion
(Watt)
AAU 3940 L1800 20 2 15.2 0 0 20
AAU 3940 L1800 20 2 18.2 1 -3 20
AAU 3940 L1800 20 2 20 2 -4.77 20
AAU 3940 L1800 20 2 21.2 3 -6 20
PA1 PA2

Configuration Scenario Number of Output Number of Output

(Total Number of Carriers) LTE FDD Power per Power per
LTE FDD
LTE FDD LTE FDD
Carriers Carriers
Carrier (W) Carrier (W)

LTE FDD 1 (MIMO) 1 20 1 20

Assumption :
GSM Power =
20 Watt with
2TRX

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9

LTE Power Calculation
Huawei

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10

 RRU and RS Power Configuration– Sample 2511080_SNDGJY (RRU 3952)
Maximum RRU Capability per Port Current Use

60 watt
30 watt

RS , PB and PA Configuration

With current RRU Capability we can

increase RS Power until 21.2,

But now RS Power configuration only

18.2 there is inefficiency Power

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 11

Configuration Suggestions on CRS Power, P A, and PB
 Hedex eRAN Power Control Feature Parameter Description

The three values (CRS power [denoted by P RS in this section], PA, and PB) determine the transmit power for CRSs, transmit power for data, and the numeric relationship
between the two types of transmit power. The three values affect downlink throughput and some important KPIs such as the handover success rate and access success rate.
To improve downlink throughput and KPIs, configuration suggestions are provided as follows, which vary depending on the main source of interference to the data of the
local cell:

 The main source of interference is CRSs transmitted in neighboring cells when neighboring cells are lightly loaded (cell load is lower than 20%). In this case, an
effective measure is to increase the transmit power for data and decrease that for CRSs in both the local cell and the neighboring cells. Specifically, the following
settings are recommended in a scenario with a total power of 40 W and a bandwidth of 20 MHz: P RS = 15.2 dBm, PA = 0, and PB = 0.
 The main source of interference is data transmitted in neighboring cells when neighboring cells are heavily loaded. In this case, an effective measure is to increase the
transmit power to an appropriate value for CRSs in the local cell to improve the PDSCH demodulation performance. Specifically, the following settings are
recommended in a scenario with a total power of 40 W and a bandwidth of 20 MHz: P RS = 18.2 dBm, PA = -3, and PB = 1.

From hedex explanation its mean when cell load is higher than 20% state
as loaded condition and better to set PB:1 and PA:-3

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 12

Executive Summary RS Power, PA and PB
Power : 20 Watt
RS : 15.2 dBm
PB : 0
PA : 0 With same power consumption, we can
BW : 10 MHz
increase RS Power coverage in order to fill
blank coverage area.

PB:0 and PA:0 only suitable for Low Load

Type A : 15.2 dBm CRS: 15.2 dBm PRB Utilization (PRB<20%).
Type B : 16.2 dBm
We can see that TypeB coverage are more
further than RS Power which make RS
demodulation interferer from neighbor cell
Power : 20 Watt
RS : 18,2 dBm
when it loaded.
PB : 1
PA : -3
BW : 10 MHz Throughput fully dependent with SINR Level,
when RS defeated by PDSCH_A neighbor
cell, lower SINR can affected with the DL/UL
Throughput.
Type A : 15.2 dBm Type B : 15.2 dBm

CRS: 18.2 dBm

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 13

 RS Power Comparison (PB:0)
Power

PCIMod3:0

Power

PB = 0
Site X
Freq
PCIMod3:1

Power
Freq
PCIMod3:2

PB = 0
Rs_X
PCIMod3:0

Freq

PCIMod3:1 When RS Power site X are lower

than PDSCH Power site Y, RS_SINR
Site Y will be poor which affecting low
throughput issue when neighbor cell
Pdsch_Y heavy loaded. UE RS demodulation
will be impacted
PCIMod3:2

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14

 RS Power Comparison (PB:1)
Power

PCIMod3:0

Power

PB = 1
Site X
Freq
PCIMod3:1

Power
Freq
PCIMod3:2

PB = 1
Rs_X
PCIMod3:0

Freq
When RS Power site X are higher
PCIMod3:1
than PDSCH Power site Y, RS_SINR
will be good which affecting better
Site Y throughput result when neighbor cell
Pdsch_Y
heavy loaded. UE RS demodulation
will be easy from UE side

PCIMod3:2

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15

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