Cloud RAN Introduction Huawei The 4th CJK International Workshop – Technology Evolution and Spectrum September 6th, 2011, Bundang, Korea HUAWEI TECHNOLOGIES CO., LTD.
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Outlines
Background
Network Architecture Evolution
Cloud RAN Key Challenges Studies
Scenarios of Cloud BB Deployment
Summary
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Background
Email
Video TV
Video Personal
Gaming
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
GPS
Cloud Computing has become a hot topic on the Internet for IT industrial magnates such as Microsoft and Google. As a result, they are boosting their data services and tailored applications.
Wireless networks today need to supply not only voice services, email, Video, Gaming and GPS, but also future oriented service extensions. The number of voice users and mobile broadband users will significantly increase due to the HSPA Evolution and LTE/-A technologies. To meet this trend, mobile operators must pay full attention to future development strategies and ways to save on Total Cost of Ownership (TCO). Can Cloud Concept be used in Wireless network? How to use?
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Outlines
Background
Network Architecture Evolution
Cloud RAN Key Challenges Studies
Scenarios of Cloud BB Deployment
Summary
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Network Architecture: MBB Evolution Concept Direction
EPC
Now
Next
Internet
Internet
GGSN SGSN
Expansion Internet
P-SGW
MME
EPC
P-S GW/GSN
MME/SGSN
BSC/RNC
P-S GW/GGSN
MME/SGSN
BSC/RNC
Cloud BB
BSC/RNC
IP + Fiber
IP
Femto
Femto
Femto
Macro
Macro
Micro
SingleRAN, 5 band 3 mode in 1 site
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
Macro Micro RRU
Pico
HetNet: Pico/Micro + Macro Small cell offload
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Flat architecture Cloud BB
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Pico RRU
Outlines
Background
Network Architecture Evolution
Cloud RAN Key Challenges Studies
Scenarios of Cloud BB Deployment
Summary
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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TCO Analysis required BBU location
Transport Resource requirement Network
Configuration
CPRI Data BW(Mbps)
UMTS
S1/1/1
614.4
UMTS
S2/2/2
1167.36
S1/1/1 20MHz
7372.8
LTE
Application scenario Legacy network change to BBU integrated installation New build network (eg. LTE) Assumption:500m cell radius
Cost expenditure
4 Types of BBU :
Fiber leasing cost Fiber civil work cost
Site rental saving Site rental saving 7BBU
19BBU
37BBU
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
91BBU
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Site visit cost saving
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Current limitation and suggestion Macro BTS w/ equipment room One access loop, ten BTS
Aggregation Lab
New site
One Backbone Ring, six Aggregation Rings
One Aggregation Ring, fifteen Access Rings
Core Lab
Backbone Lab
Short distance, no loop protection
R R U
Site with Legacy Macro BTS equipment room
RNC
Traditional mode R R U
R R U
R R U
R R U
Aggregation Lab
R R U
One Backbone Ring, six Aggregation Rings
One Aggregation Ring, fifteen Access Rings
BBU
New site long distance, loop protection needed
Core Lab
Backbone Lab R R U
R R U
R R U
R R U
RNC
BBU center in Aggregation Lab /RRU
For operators with abundant optical fibers, BBU center solution can be deployed, otherwise the cost will be high The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Outlines
Background
Network Architecture Evolution
Cloud RAN Key Challenges Studies
Scenarios of Cloud BB Deployment
Summary
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Scenario of Cloud BB Deployment Scenario 2
BB Cloud ~10 Site, 5~10km2
Access Ring
…
Aggregation Ring
WDM
More
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
BB Cloud >10 Sites, >10 Km2
Scenario 1 • 20%~50% capacity Increase by coordination Scenario 2 • ~90% Equipment room saved • 51% TCO decrease Scenario 3 • Scalable to 200 BBUs
Scenario 1 Fiber request
BB Cloud Macro + SmallCell
Scenario 3
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Cloud BB Improve HetNet Capacity by Interference Mitigation Interference analysis
eICIC Macro Micro Protected Subframe
CoMP (CBF/CS, JP) Cloud BB
Signal
Interference
• More Cell-Edge UEs, More Intereference, More block
• Interference control by Mother-Child Sites • Adaptive ICIC, eICIC, CoMP ……
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Outlines
Background
Network Architecture Evolution
Cloud RAN Key Challenges Studies
Scenarios of Cloud BB Deployment
Summary
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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Summary
Because the wireless network performance benefit will come from BB pool solution for LTE-A, and cloud computing BB pool is far from commercial
application, the proper time for ultimate Cloud-RAN may be LTE volume construction
From the current Technology and Application limitation, the Mother-Child Sites deployment is the best one of Cloud RAN scenarios for improving capacity
based on interference control
The 4th CJK International Workshop September 6th, 2011, Bundang, Korea
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