GSM C-RAN Uni-RAN GU Solution Highlight Package
1
C-RAN, The Trend of Network Evolution
Three Clouds, One Site, One Network
2
> Internal Only
Challenges of Wireless Network Development BS number Power Consumption
Worse Network Quality and User Experience Power consumption (100 million kwh)
BS Number (10,000)
Higher Power Consumption
Lower Utilization Rate
Convergent Multi-mode Network
Traffic Volume
Business Areas
GSM
GPRS
EDGE
Residential Areas
eEDGE TDSCDMA WCDMA R99
HSPA
HSPA+
HSDPA R5
cdma 2000
cdma 2000 EV-DO
LTE
HSPA+ R7
HSUPA R6 MBMS
cdma 1X
TDD
MBMS
4G FDD
EV-DO Rev. A EV-DO Rev. B
Time
802.16 d
802.16 e
802.16 m
Source: Statistic Data from a Chinese Operator 2010
Cost , performance, power consumption and convergence are the main problems puzzling operators. 3
Innovative Network Architecture Is Essential Solution
> Internal Only
Innovative network architecture is the essential way to help operators overcome these challenges! Network element
Improve integration level Process updating Ports control
Network architecture
Improve integration level Power saving design Optimized Software
4
Unified hardware platform System architecture of power saving
Innovative network architecture Integrated power saving of total network
> Internal Only
C-RAN Restructures Network Architecture
Cloud
One site, One mode Traditional
One site, Multi-mode GSM
SDR based Uni-RAN LTE
Centralized Collaborative Clean One site, Multi-mode
UMTS
C-RAN
Multi-network, Multi-site
GSM/UMTS/LTE
One network, Multi-site
One network, One site 5
C-RAN, The Trend of Network Evolution
Three Clouds, One Site, One Network
6
C-RAN, Three Clouds C-RAN is composed of three clouds Baseband Cloud
Radio Cloud
Multi-RRU in one cell
Coordinated Multi-Point Processing
High spectral efficiency
General-propose processor
BTS virtualization technology
Dynamic resource scheduling
Transmission Cloud
Optic transmission network
High bandwidth, low latency
One site, One Network, High capacity, High-performance 7
> Internal Only
Baseband Cloud Converges Baseband Resource Baseband Cloud
Standard CPRI interface and BBU with large capacity are the foundation of Baseband Cloud BBU ZTE dedicates the R&D of BBU with high capacity.
BTS Major Function Units Other Vendor
Control Interface Clock
Baseband Processing
BBU
RF Transceiver
Outdoor RRU/Indoor RSU Non-Standard CPRI BBU
ZTE
8
Standard CPRI Outdoor RRU/Indoor RSU
Baseband Cloud Achieves Dynamic Resource Sharing Traffic Migration
Downtown
> Internal Only
Uptown
Dynamic Resource Sharing TRX Resource Sharing M TRXs
Dynamic TRX Allocation
allocation threshold
according traffic Migration
Pre-Set Allocation
Save baseband resources
Adjustable Baseband resource
Adjustable Baseband resource release threshold
N TRXs
GSM C-RAN solves traffic tide problem by dynamically allocating baseband resource to cell based on cell traffics. 9
> Internal Only
Baseband Cloud Reduces TCO
Data Source from trial network of C-RAN with18 sites of S444 in China Zhuhai
Traditional (＄)
Contrast item
Saving percent
equipment
378,900
351,900
7%
Room & associated facilities
244,300
117,300
52%
Transmission
20,900
3,000
86%
Power
142,100
62,900
56%
Fiber cable
296,400
296,400
0%
Antenna installation space
235,500
235,500
0%
1,318,100
1,067,000
19%
Station rent
28,400
8,100
71%
Network maintenance
14,900
9,800
34%
Electricity bill
65,000
12,500
81%
108,300
30,400
72%
CAPEX
Summary
OPEX
BBU Pool (＄)
Summary
BBU pool technology simplifies network, CAPEX saves Power, maintenance and manpower cost significantly reduce, OPEX saves 10
19% 72%
> Internal Only
Baseband Cloud Evolution Virtual BS Pool BBU Pool
Single BBU with high capacity
FS based IQ data switching
Large capacity baseband pool
Intra-BBU coordination
Inter-BBU coordination
Traffic migration
Inter-rack coordination
Multi-core, multi-threads parallel general-propose processor
BTS virtualization technology
Cloud calculation technology
Baseband cloud advances the process of one network with one site.
11
> Internal Only
Radio Cloud Achieves Cooperative Coverage Radio Cloud
R8882
Tx/Rx Rx Rx Tx/Rx Tx/Rx Rx Rx Tx/Rx
18 RRU Cascading RRU Ring Protection
PA PA
PA PA
…
High Capacity Application
Dual Band Application
12
> Internal Only
Radio Cloud Origins from Multi-RRU in One Cell Independent Physical Cell RRU
RRU
RRU
Hand Over
Hand Over
Multi-RRU in one cell extends coverage by 3dB
RRU
Share Logical Cell
RRU
Cooperative
Cooperative No Inter-Cell Interference 3dB Diversity Receive Gain
RRU
RRU
RRU
RRU
RRU
BBU
RRU
RRU
RRU
RRU
BBU
Option 1: Baseband Combination
Option 2: RF Combination 13
Interference in overlap area No Diversity Gain
> Internal Only
Radio Cloud Improves Network Performance Multi-RRU in one cell improves network quality
HK CSL, 30% sites enable shared logical cell function, hand over frequency decreased by 40%!
Hand Over Success Rate
Indoor and Outdoor MOS Comparison
Indoor MOS>4, 80.41%，Outdoor MOS>4, 61.07%
CSL Ranks No.1 in HOSR, MOS and Throughput
14
EDGE Throughput
EDGE DL Speed in busy hour, 3+1 Terminal test
> Internal Only
Coordinated Multi-Point Radio Cloud Broadband PA Multi-band supporting 2G/3G/4G smooth evolution
PA
AAS
AAS
AAS AAS
Active Antenna System Multi-channel processing RF and antenna is integrated Small volume, easy prettifying
AAS
AAS
Macro coverage
Higher order modulation
Micro Cell High bandwidth CoMP
The key technology of LTE-A Multi-node service for terminal by cooperation Low interface, high spectrum efficiency
15
> Internal Only
Transmission Cloud Provides High Capacity
Transmission Cloud
Core layer 10G
6G CPRI interface
16
Supporting 120 TRXs for one 6.144G optical interface Maximum 6~9 BTSs for 18 RRU connecting Need a pair of fiber
> Internal Only
GSM C-RAN Transmission Cloud Centralized BBU Pool
Direct fiber connection
Access Ring
Enhanced direct fiber connection
of Fiber
GSM
S666/1.25G interface
6G CPRI interface
18 RRU connecting
CPRI Interface
IQ Data Per TRX
Capacity per fiber
1.2288Gbps
Payload: 35Mbps (uplink/downlink); 44Mbps (8/10 coding)
> 24 TRX
2.4576Gbps 6.144Gbps
> 48 TRX > 120 TRX
Direct fiber connection simplifies deployment and satisfies the requirement of GSM C-RAN, but network-oriented needs higher capacity. 17
> Internal Only
Future-oriented Integrated Transmission Cloud Solution
Direct fiber connection
Colorama BBU C-SFP
C-SFP
C-SFP
C-SFP
C-SFP
C-SFP
C-SFP
C-SFP
OMD
OMD
CPRI over WDM/OTN
Baseband Cloud
PON OLT
Splitter
WDM/OTN
ONU
MUX/DM
CPRI over uniPON
ONU 18
> Internal Only
ZTE GSM C-RAN Roadmap Virtual cloud computing General-purpose processor
Virtual BTS CPRI over WDM/OTN, uniPON
Inter-BBU TRX sharing
108 TRXs BBU 6Gbps optical Interface 18 RRU cascading Traffic migration
Distributed cloud computing Cloud transmission
BTS cooperation large capacity resource sharing by inter-BBU Improve edge rate by RRU cooperation
BBU convergence
RRU ring for protection
Direct fiber connection
CPRI optical port with high speed
Baseband resource sharing inside BBU
19
60 TRXs BBU Intra-BBU TRX sharing 3Gbps optical Interface 6 RRU cascading Ring protection 12 RRU merging
> Internal Only
ZTE C-RAN Development
5 WCDMA
CDMA2000 GSM
TD-SCDMA
LTE
1 In 2004, ZTE proposed the concept of “operation& maintenance factory”
2 In 2005, ZTE SDR platform was launched.
ZTE continuously cooperates with CMCC to promote development of C-RAN.
3
In 2010, BBU pool was launched in CMCC Zhuhai branch.
4
In April, 2010, ZTE and CMCC signed C-RAN MOU
20
In the 4th Mobile Internet Conference, ZTE and IBM demonstrated a prototype of CRAN for business presentation.
21
