Mulit-technology Single RANs – System Requirements and Solutions Jena May, 9th 2008
HUAWEI TECHNOLOGIES CO., LTD.
Michael Lemke, PhD www.huawei.com
HUAWEI TECHNOLOGIES CO., LTD.
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Achievements in 2007 UMTS
Softswitch
GSM
86
470M+
(Contracts)
(Subscribers)
700K+ (TRXs in 2007)
No.1 in 2007
No.1
Top 3
CDMA
WIMAX
240
38
(Operators)
Networks Worldwide
No.1
USD 7 billion contract sales in 2007
Commercial contracts: 86 UMTS/HSPA, 65 EVDO, and 12 WiMAX
GSM 700K TRXs shipment in 2007, account for 21％ market share
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Preface
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Future Wireless Network
Features of Future Network Ultra-high data rate and low latency
Vision of Service
Enhancing User All IP Experience Network
Low cost
Features of Service
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Ubiquity
Service Transformation Demands Wider Bandwidth Bandwidth Improvement : Key techs & smaller coverage 1995
2000
2005
O F D M / M I M O / A A S
2010+ WCDMA Evolution
Launch HSPA
WCDMA
CDMA2K Evolution
GSM
802.16e WiMAX
CDMA2K 1G (Analog)
IS95 2.4GHz WLAN
~14.4kbps
144kbps
5.8GHz WLAN
384kbps
802.16d WiMAX
50Mbps
100Mbps
E2E IP: IP core & IP Transmission
The HSPA brought fast growth in data services, network value has been improved sharply.
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Evolution to Future Technologies 2007
2008
2009
2010
2015
2020
Performance HSDPA DL:14.4Mbps UL: 384kbps
HSUPA DL:14.4Mbps UL: 5.76Mbps
HSPA+ DL: 40Mbps UL: 10Mbps
LTE DL: 100Mbps UL: 50Mbps
>1Gbps
Spectrum WIMAX / LTE
LTE + +
UMTS
GSM GSM phase out?
Broadband era requires more bandwidth
Technology neutrality within the available spectrum
Multi-technology co-existence / multiple migration options / paths
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The Challenge(s)
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Operator challenges in this evolution? Quality and Performance Customer Expectations
Operator
Multi-standard vs Cost Efficiency
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Growing Traffic ≠ Growing Income
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Single RAN : Managing the challenges! Current Advantages Disadvantages Core Network
Single RAN GSM / UMTS / HSPA / LTE GSM Expansion
Fast Deployment on Deploy systems separately Demand
Current GSM Network
Convergence
• UMTS Roll-out Pressure • LTE is Approaching
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High OPEX -
Equipment Level Component Level Transmission Level LTE in the coming future
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Sharply reduced OPEX Operate systems separately Maintain systems separately
Outstanding Performance
Performance Down High Reliability -
• GSM Expansion Pressure
Buy systems separately
-
UMTS/HSPA Introduced
Flexible Business Plan
-
Backhaul
High CAPEX
Bad intersystem coordination High intersystem interference
Reliability Down - Fault point & risk increasing - Hard for trouble shooting
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Requirements for Vendors • Clear solution & roadmap Industry consensus on 4G technologies timeline to market UMB ? 2009 onwards
WiMAX 1.0 2007
HSPA+ 2009 onwards
2007
WiMAX 2.0 (16m) 2011+ onwards
WiMAX 1.x 2009 onwards
2008
LTE 2010 onwards
2009
2010
Time to Market
• The same platform & all IP network architecture should be adopted all RAN technologies WiMAX BTS
eNodeB
IP Core
IP Core
WiMAX BTS
SAE-GW
ASN-GW
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eNodeB
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Key Radio Technologies Requirements ① System to be 20MHz capable • 2G/3G: Multi-TRX / Multi-Carrier •16e: currently main focus on mandatory 5/10MHz, 20MHz optional • LTE: 20MHz mandatory (+scalability) System Requirements • Radio Unit: wide broadband RF technologies, 20MHz support • Baseband Unit: 20MHz processing capability high transmission power required
System Gain (dB) = EIRP (dBm) – RX Sensitivity composite (dBm) + Antenna Configuration Gain (dB) + Cyclic Combining Gain (dB)
Wider channel size, lower sensitivity
advanced antenna required
② More transmission power needed: high efficiency Power Amplifier ③ Advanced multiple antenna technologies for additional gain HUAWEI TECHNOLOGIES CO., LTD.
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High efficient Power Amplifier • PA determines volume, weight, power consummation which directly influence CAPEX • Doherty & DPD PA should be adopted in initial network deployment
P
Out 4 /
Doherty •Up to >30% power efficiency
λ λ
In
C
DPD advantages • Better linearity than FF • Higher efficiency than FF
) A’ m B d ( t A u p t u O F R
Saturation DPD Linear Region Saturation FF Linear Region 0
+10 +15 +20 RF Input (dBm) Linear characteristics of FF and DPD HUAWEI TECHNOLOGIES CO., LTD.
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Advanced Multiple Antenna Technologies • 2T4R and 4T4R could be the main stream for future 4G technologies • Capability for future advanced multiple antenna technology evolution IMT-Adv.(4G) Candidates Multiple Antenna Configuration Requirements
Feature
MIMO Configuration
802.16m/Mobile WiMAX
3GPP LTE
3GPP2 UMB
Source: 3GPP TR 25.913
Source: CDG
DL: 2x2, 2x4, 4x2, 4x4 MIMO UL: 1x2, 1x4, 2x2, 2x4 MIMO
DL: 2x2, 2x4, 4x2, 4x4 MIMO UL: 1x2, 1x4, 2x2, 2x4 MIMO
R2 Source: IEEE 802.16m DL: 2x2, 2x4, 4x2, 4x4 MIMO UL: 1x2, 1x4, 2x2, 2x4 MIMO
Additional Gain from 2T4R & 4T4R MIMO-BF technologies Antenna Configuration
Additional Gain Compared to
2T4R
4T4R MIMO-Beam Forming
Downlink
Uplink
Downlink
Uplink
-
2~4dB
4~6dB
2~4dB
2T2R
3dB Output gain means, 120% Radius gain, 140% Coverage gain & ~30% Sites reduction
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Solutions
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Single RAN starts in NodeB Evolution brings simplicity and multi-technology support
Digital MultiCarrier PA
Distributed architecture
Zero footprint
G/U/LTE/Wimax Co-platform
Multi-carrier
All IP
Green
Now
RRU RFU
RRU
DBS
High-performance HSDPA
indoor BBU
Uni-BTS BBU
R4 R3 R1
io n E vo l u t R2 n o i t a t S i B a s e H u a w e
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outdoor
Single RAN by Software Defined Radio Software upgrade to support new technologies or additional capacity GSM
UMTS+LTE
GSM+UMTS 2G
2G
Antenna
Now
LTE
3G
3G
Future Active Antenna
Radio Remote Unit BBU Base Band Unit
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Single RAN High Efficiency Broad-Band PA technology reduce OPEX
S1/1/1, Typical Configuration
1500W
DPD+ A-Doherty
n o i t p m u s n o c r e w o p
800W
60% saving 590W
35% saving
400W
Previous Industry Standard Outdoor Macro
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73% saving
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520W
Previous Industry Standard Indoor Macro
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Huawei Indoor Macro
Example: WiMAX Network Switching to LTE Purely software upgrade to protect investment • Same Base Station platform for WiMAX & LTE • Same GW platform for WiMAX & LTE
New MME added
Software Upgrade to LTE
MME Software Upgrade to SAE-GW
WiMAX eNodeB BS
CSN
IP Bear Network
DHCP server
ASN-GW SAE-GW Software Upgrade to LTE
eNodeB WiMAX BS
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HA
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Radio Unit Switching Examples 10MHz LTE 10MHz WiMAX
Multiple Carriers WiMAX Radio Units
e r a d p g U a r e w t f S o
Dual Mode Radio Unit S o f t w a r e U p g r a d e
LTE(TDD) only Radio Unit
Software Upgrade
20MHz LTE (TDD)
2x10MHz WiMAX
• Multiple Carrier support, upgradeable to 20Mhz • PA: >30%, DPD & Doherty based high output power • Multiple antenna technologies: 2T4R/ 2T2R supported
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Easy Modernization and Evolution solution 1
Convergence
G/U/LTE Co-platform
Software upgrade to future
2
Uni-BTS 4
Same footprint, 3 times capacity
50%+ Power amplifier efficiency
Smooth Evolution
Green
Power Saving
Reduction of auxiliary facilities
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Smooth Evolution
Multi-carrier
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All IP
Pure IP core and interfaces, the way to internet era
Transmission savings
Thank You!
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