Huawei GSM Network Energy Saving Solution(for Technical)

HUAWEI TECHNOLOGIES CO., LTD.

www.huawei.com

Huawei Confidential

Security Level:

47pt

30pt

反白

:

FrutigerNext LT Medium

: Arial

47pt

黑体

28pt

反白

细黑体

2011/7/15

GSM Network Energy Saving Solution

Secret

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

35pt

32pt

) :18pt

Page 2

Introduction to Huawei Energy Saving Service Delivery Technology

Based on the device capability, Huawei's unique key technology algorithm and

policy guarantee high network energy efficiency at the network level.

BTS

BTS

BTS

BG BSC

MGW

MSS

FW

SGSN GGSN

Fixed Network/ Other Mobile Network

FW Fixed Network/ Other Mobile Network

Internet/Intranet

Network level

1. Power control

2. Interworking between 2G and 3G networks

3. Assignment and adjustment of network capacities

4. Adjustment of full rate and half rate parameters

5. Channel assignment algorithm

6. Energy-saving improvement on the main BCCH

Device level

1. Multi-carrier

2. Intelligent TRX shutdown

3. Intelligent power amplifier shutdown at timeslot level

…

4. Intelligent voltage adjustment of TRXs

5. Intelligent PSU shutdown

Network

management level

1. Energy management system

iManager

M2000 V2


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Energy Saving by Using Multiple Carriers

Page 3

1. The power amplifier efficiency is improved by using the carrier modules in BTS3900.

2. For the multi-carrier technology, multiple carrier signals are transmitted on one radio frequency

channel. Therefore, in the case of high-level configuration, the quantity of modules is minimized, and

the power consumption is significantly reduced.

1050

1450

1800

1000

1270

1730

780 660

1260

0

200

400

600

800

1000

1200

1400

1600

1800

2000

S444 S666 S888

BTS3012(40W DTRU)

BTS3900(DRFU)

BTS3900(GRFU)

900 M

S444 S666 S888

TOC Average Power

Consumption TOC

Average Power

Consumption TOC

Average Power

Consumption

BTS3012 (40 W DTRU) 15 W 1050 7.5 W 1450 7.5 W 1800

BTS3900 (DRFU) 15 W 1000 15 W 1270 15 W 1730

BTS3900 (GRFU) 15 W 780 7.5 W 660 7.5 W 1260

100.00%

100.00%

100.00%

95.24%

87.59%

96.11%

74.29%

45.52%

70.00%

0.00% 50.00% 100.00% 150.00%

S444

S666

S888

Power consumption comparison between BTS3012, BTS3900 (DRFU), AND BTS3900

(GRFU) in S444/S666/S888 mode


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Page 4

Energy Saving Feature — Intelligent Shutdown TRX

TRX3

Description

During low traffic period, assign BCCH TCH with priority, and then

power off the TRX in idle state.

TRX1

TRX1

TRX2

Before After

TRX

Power of Each TRX

TRX 1 TRX 2 TRX 3

TRX

Power of Each TRX

TRX 1 TRX 2 TRX 3

Save more power

Power on Power off

Benefit

Typical scenario can save up to 4% power consumption.

Max can save up to 6% power consumption.


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Page 5

Energy Saving Feature — Intelligent Shutdown PA Based on

TS

TS 0 3 7 Power on Power off

Description

Base on timeslot of TRX to shutdown its PA power, saving power

greatly.

1 2 3 4 5 6 7

Busy Free

Traffic of TRX

0

Power of PA

TS 0 3 7

Power of PA

Save more power

Benefit

Typical scenario can save up to 20% power consumption. Max can save

up to 30% power consumption.

Before After

2 2


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Page 6

Duplex

Synthesizer

PA

60W

15 W

15 W

30 W 24 W

60W

30 W 24 W

TR

X

TR

X

1 dB loss

1 dB loss

PA

PA

PA

Combiner

Duplex

ICB Mode: 15 W+15 W, at PA output

3 dB insertion loss

TR

X

TR

X

3 dB gain

Normal Mode: 60 W+60 W, at PA output

ICB: Intelligent Combiner Bypass

Energy Saving Feature — Intelligent Combiner Bypass

Benefit It can save up to 2 % power consumption.


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Page 7

Energy Saving Feature — TRX Working Voltage Adjustment

When the carrier output power reduce, the working voltage of the carrier will reduce.

Output-Power/POWER AUDEO EFFICENCY

Benefit

It can save up to 5%-10% power consumption.


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Page 8

Energy Saving Feature — Multi-carrier Intelligent Voltage

Regulation

0

5

10

15

20

25

30

0:00-1:00

2:00-3:00

4:00-5:00

6:00-7:00

8:00-9:00

10:00-11:00

12:00-13:00

14:00-15:00

16:00-17:00

18:00-19:00

20:00-21:00

22:00-23:00

Time

Av

g P

ow

er

(W)

/ sec

tor

After: adjustable PA

voltage

Description Provide different PA voltages for different output power in the downlink. As

the multi-carrier PA works according to the real-time traffic situation, PA

efficiency is improved largely and more power saved.

Avg Power / sector

Before: fixed PA voltage

Benefit

It can save up to 5%-10% power consumption.


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Page 9

Description

The higher percentage of

speech services to total

services is, the more power

consumption decrease

Energy Saving Feature — Power Optimization Based on

Channel Type

Voltage of Carrier’s PA

Carrier with PS service

(8PSK)

Only speech

(GMSK)

Service on a

carrier

Time

Time

Time

Voltage of

Carry PA

Voltage of

Carry PA

CH0 CH7 CH3

TCH

CH0 CH7 CH3

PDCH

CH0 CH7 CH3

Before

After

Benefit: It can save up to 5%

power consumption


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Page 10

Energy Saving Feature — Discrete Transmission (DTX)

Description

When no speech signal is transmitted during a call time, man-made

"comfortable noise" is sent instead. Therefore, power consumption of BTS

can be reduced and interferences depressed.

Benefit It can save up to 4 % power consumption.

Power on

TS

Power of PA Save more

power

Transmission Power

Traffic during a call


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Page 11

Energy Saving Feature — Enhanced BCCH Power Consumption Optimization

BCCH TRX without EBPCO

BCCH,TS0, 60W

TS1, 60W

TS2, 60W

Anytime all timeslot at maximum output power

TS0 TS1 TS2 TS3 TS4 TS5 TS6 TS7

60

W

T

BCCH TRX with EBPCO

BCCH,TS0, 60W

TS1, 30W

TS2, 50W

Dynamic power control on non-BCCH timeslot

TS0 TS1 TS2 TS3 TS4 TS5 TS6 TS7

60

W

T

30

20

10

40 3dB max.

Save more power

Benefit It can save up to 4% power consumption. The activation of this function may influence the MS measuring accuracy for neighboring cells, which is recommend to use during nighttime when there is low traffic.


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Page 12

Energy Saving Feature — PSU Smart Control

off off on

on on on

High traffic, PSU all on

Low traffic, part of PSU off

Benefit It can save up to 3% power consumption.


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Page 13

Energy Saving Feature — Active Backup Power Control

When the power of BTS is shut down, the backup battery will

be used. Backup power control can help BTS backup battery

to reduce the consumption, make the backup battery provide

longer working hours.

1, Coverage priority

2, Capacity priority

3, Backup priority


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Page 14

Energy Saving Feature — Dynamic Cell Power Off

Conventional dual-band cell

Network of all frequency bands

works all the time

Intelligent dual-band network power off

During low traffic period, only 900 M

network with wide coverage works, and

the 1800 M cell is powered off.

900 M 900 M

1800 M 1800 M

power off

Benefit It can save up to 5%-10% power consumption.


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Page 15

Energy Saving Solution — Driving Lower Energy Consumption of Auxiliary Devices

Lower energy consumption of main devices results in lower energy

consumption of auxiliary devices (industry experience: 1:0.7).

Business hall

Office

Base station

room

Core equipment room

Main

devices Other auxiliary

devices

Power consumption

distribution of the

base station room

Air

conditioners

Power consumption

distribution of operators

46% 51% 3%

Power consumption of auxiliary

devices (such as air conditioners)

varies with the power consumption of

main devices


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Page 16

Challenges facing the customer

Operator S has an annual power expense budget of 212

million Yuan. The first quarter has consumed 24% of the

annual budget. The operation and maintenance cost

budget imposes great pressure upon the operator.

Operator S is facing an energy-saving audit but lacking

investment budget on energy-saving alteration of the

network.

Values brought by Huawei energy-saving service solution

Develop new technology by using network energy-saving

algorithm and realize 10%-35% reduction of power

consumption.

Launch network performance monitoring and deploy

network energy-saving service, which does not influence

the network performance.

The energy-saving effect can be monitored in real time,

realizing the refined management of electric energy at the

modeling benchmark site.

Assist China Unicom in green energy saving of mobile

networks:

Work with operator S to construct a green energy-saving

telecommunication network. Successfully deliver Huawei

GSM BSS energy-saving service, save about 30% electric

power with obvious energy-saving effect.

Success Story

Reduce OPEX & TCO

Thank you www.huawei.com

Documents

Huawei GSM Network Energy Saving Solution(for Technical)