Huawei GSM Network Energy Saving Solution(for Technical)

Security Level: Secret

2011/7/15

www.huawei.com

GSM Network Energy Saving Solution HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

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. Network level 3. Assignment and adjustment 5. Channel assignment algorithm of network capacities

1. Power control

2. Interworking between 4. Adjustment of full rate and 2G and 3G networks half rate parameters

… MSS

BTS

Fixed Network/ Other Mobile Network

MGW

BTS

BG

BSC

BTS

6. Energy-saving improvement on the main BCCH

iManager

SGSN

GGSN

FW

M2000 V2

Network management level 1. Energy management system

HUAWEI TECHNOLOGIES CO., LTD.

Fixed Network/ Other Mobile Network

FW

Internet/Intranet

Device level 1. Multi-carrier 2. Intelligent TRX shutdown

4. Intelligent voltage adjustment of TRXs

3. Intelligent power amplifier shutdown at timeslot level

5. Intelligent PSU shutdown

Huawei Confidential

Page 2

Energy Saving by Using Multiple Carriers Power consumption comparison between BTS3012, BTS3900 (DRFU), AND BTS3900 (GRFU) in S444/S666/S888 mode 2000

1800 1730

1800 1600

1270

1260

10501000

45.52%

BTS3012(40W DTRU) S666 BTS3900(DRFU)

1000 800

96.11% 100.00%

1450

1400 1200

70.00% S888

780 660

87.59% 100.00%

BTS3900(GRFU)

600 400

74.29% 95.24% 100.00%

S444

200 0 S444

S666

S888

0.00% S444

900 M

50.00%

S666

TOC

Average Power Consumption

BTS3012 (40 W DTRU)

15 W

BTS3900 (DRFU) BTS3900 (GRFU)

100.00%

150.00%

S888

TOC

Average Power Consumption

TOC

Average Power Consumption

1050

7.5 W

1450

7.5 W

1800

15 W

1000

15 W

1270

15 W

1730

15 W

780

7.5 W

660

7.5 W

1260

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. HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 3

Energy Saving Feature — Intelligent Shutdown TRX

TRX1

TRX3

TRX1

TRX2

Before

Power on

Power off

Power of Each TRX

After

Power of Each TRX

Save more power

TRX TRX 1

TRX 2

TRX 3

TRX TRX 1

TRX 2

TRX 3

 Description

During low traffic period, assign BCCH TCH with priority, and then power off the TRX in idle state. Benefit

Typical scenario can save up to 4% power consumption. Max can save up to 6% power consumption. HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 4

Energy Saving Feature — Intelligent Shutdown PA Based on TS Traffic of TRX Busy

Free

0 1 2 3 4 5 6 7

Before

After

Power of PA

0

2 3

Power of PA

7

TS

Power on

Power off

0

2 3

Save more power 7

TS

 Description

Base on timeslot of TRX to shutdown its PA power, saving power greatly. Benefit

Typical scenario can save up to 20% power consumption. Max can save up to 30% power consumption. HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 5

Energy Saving Feature — Intelligent Combiner Bypass Normal Mode: 60 W+60 W, at PA output PA

60W

1 dB loss 24 W

30 W

TRX

TRX

Combiner PA

Duplex

3 dB insertion loss

60W

ICB: Intelligent Combiner Bypass

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

15 W

1 dB loss 30 W

TRX

TRX

Synthesizer

24 W Duplex

PA 15 W

3 dB gain

Benefit

It can save up to 2 % power consumption.

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 6

Energy Saving Feature — TRX Working Voltage Adjustment Output-Power/POWER AUDEO EFFICENCY

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

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

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 7

Avg Power (W) / sector

Energy Saving Feature — Multi-carrier Intelligent Voltage Regulation 30

Before: fixed PA voltage

25 20 15

After: adjustable PA voltage

10

Avg Power / sector

5 Time

22:00-23:00

20:00-21:00

18:00-19:00

16:00-17:00

14:00-15:00

12:00-13:00

10:00-11:00

8:00-9:00

6:00-7:00

4:00-5:00

2:00-3:00

0:00-1:00

0

 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.  Benefit

It can save up to 5%-10% power consumption. HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 8

Energy Saving Feature — Power Optimization Based on Channel Type TCH

Service on a carrier

Voltage of Carrier’s PA CH0

CH3

CH7 CH0

CH3

PDCH

CH7

CH0

CH3

CH7

Time Before Voltage of Carry PA

Carrier with PS service (8PSK)

Only speech (GMSK)

Description The higher percentage of speech services to total services is, the more power consumption decrease

Time After Voltage of Carry PA

Benefit: It can save up to 5% power consumption

HUAWEI TECHNOLOGIES CO., LTD.

Time

Huawei Confidential

Page 9

Energy Saving Feature — Discrete Transmission (DTX) Traffic during a call

Transmission Power

Save more power

Power of PA

Power on

TS

 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.

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 10

Energy Saving Feature — Enhanced BCCH Power Consumption Optimization BCCH TRX without EBPCO

BCCH TRX with EBPCO

W

Save more power

W

60

60 40

3dB max.

30

TS0 TS1 TS2 TS3 TS4 TS5 TS6 TS7 T

20 10

TS0 TS1 TS2 TS3 TS4 TS5 TS6 TS7

T

BCCH,TS0, 60W

BCCH,TS0, 60W TS2, 60W

TS2, 50W

TS1, 60W

TS1, 30W

Anytime all timeslot at maximum output power

Dynamic power control on non-BCCH timeslot

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. HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 11

Energy Saving Feature — PSU Smart Control High traffic, PSU all on

on on on

Low traffic, part of PSU off

on off off

Benefit

It can save up to 3% power consumption.

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 12

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

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 13

Energy Saving Feature — Dynamic Cell Power Off

Conventional dual-band cell

Intelligent dual-band network power off

1800 M power off

1800 M

900 M

900 M Network of all frequency bands works all the time

During low traffic period, only 900 M network with wide coverage works, and the 1800 M cell is powered off.

Benefit

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

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 14

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). Power consumption distribution of operators

Core equipment room Office Business hall

Power consumption of auxiliary devices (such as air conditioners) varies with the power consumption of main devices

Base station room

Power consumption distribution of the base station room

Air conditioners

51%

46% 3%

Main devices

Other auxiliary devices

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Page 15

Success Story 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.

HUAWEI TECHNOLOGIES CO., LTD.

Huawei Confidential

Reduce OPEX & TCO

Page 16

Thank you www.huawei.com