www.huawei.com
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
35pt
32pt
) :18pt
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
35pt
32pt
) :18pt
Energy Saving by Using Multiple Carriers
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
35pt
32pt
) :18pt
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 3Save more
power
Power on Power off
Benefit
Typical scenario can save up to 4% power consumption.
Max can save up to 6% power consumption.
35pt
32pt
) :18pt
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 PASave more
power
Benefit
Typical scenario can save up to 20% power consumption. Max can save
up to 30% power consumption.
Before
After
2 2
35pt 32pt ) :18pt Duplex Synthesizer PA 60W 15 W 15 W 30 W 24 W 60W 30 W 24 W T RX TRX 1 dB loss 1 dB loss PA PA PA Combiner Duplex
ICB Mode: 15 W+15 W, at PA output
3 dB insertion loss T R X T R X 3 dB gain
Normal Mode: 60 W+60 W, at PA output
ICB: Intelligent Combiner Bypass
Energy Saving Feature —
Intelligent Combiner Bypass
Benefit
35pt
32pt
) :18pt
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
35pt
32pt
) :18pt
Energy Saving Feature —
Multi-carrier Intelligent Voltage
Regulation
0 5 10 15 20 25 30 0 :0 0 -1 :0 0 2 :0 0 -3 :0 0 4 :0 0 -5 :0 0 6 :0 0 -7 :0 0 8 :0 0 -9 :0 0 1 0 :0 0 -1 1 :0 0 1 2 :0 0 -1 3 :0 0 1 4 :0 0 -1 5 :0 0 1 6 :0 0 -1 7 :0 0 1 8 :0 0 -1 9 :0 0 2 0 :0 0 -2 1 :0 0 2 2 :0 0 -2 3 :0 0 Time A v g Po w er (W ) / sec to rAfter: 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
35pt
32pt
) :18pt
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 CH3 CH7 TCH CH0 CH3 CH7 PDCH CH0 CH3 CH7 Before After
Benefit: It can save
up to 5%
power consumption
35pt
32pt
) :18pt
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
35pt
32pt
) :18pt
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, 50WDynamic 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.
35pt
32pt
) :18pt
Energy Saving Feature
—
PSU
Smart
Control
off off on
on on on
High traffic, PSU all on
Low traffic, part of PSU off
Benefit
35pt
32pt
) :18pt
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
35pt
32pt
) :18pt
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
35pt
32pt
) :18pt
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 consumptiondistribution of the base station room
Air
conditioners
Power consumption distribution of operators46%
51%
3%Power consumption of auxiliary
devices (such as air conditioners)
varies with the power consumption of
main devices
35pt
32pt
) :18pt
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.