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HUAWEI TECHNOLOGIES CO., LTD. All Rights Reserved

Cloud RAN Introduction

Huawei

The 4th CJK International Workshop Technology Evolution and Spectrum

September 6th, 2011, Bundang, Korea

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The 4th CJK International WorkshopSeptember 6th, 2011, Bundang, Korea

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Outlines

Background

Network Architecture Evolution

Cloud RAN Key Challenges Studies

Scenarios of Cloud BB Deployment

Summary

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Background

Cloud Computing has become a hot topic on the Ifor IT industrial magnates such as Microsoft and

As a result, they are boosting their data services atailored applications.

Wireless networks today need to supply not only services, email, Video, Gaming and GPS, but alsooriented service extensions. The number of voiceand mobile broadband users will significantly incdue to the HSPA Evolution and LTE/-A technologmeet this trend, mobile operators must pay full atto future development strategies and ways to saveTotal Cost of Ownership (TCO).

Can Cloud Concept be used in Wireless netHow to use?

Email Video TV Video Gaming GPSPersonal

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Outlines

Background




Summary

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Network Architecture: MBB Evolution Concept Direction

SingleRAN, 5 band 3 mode in 1 site HetNet: Pico/Micro + MacroSmall cell offload

Flat architectuCloud BB

MacroFemto

Pico

Femto

Micro

Femto

Micro RRU

Now Next Ex

Macro

BSC

P-S GW/G

BSC/RNC

Internet

P-SGWGGSN

SGSNMME

EPCP-S GW/GSN MME/SGSN

BSC/RNC

Internet

EPC

IP

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Outlines

Background




Summary

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Page 7The 4th CJK International WorkshopSeptember 6th, 2011, Bundang, Korea

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TCO nalysis required

7BBU 19BBU 37BBU 91BBU

BBU location

Assumption:500m cell radius

4 Types of BBU :

Cost expendi ture

Fiber leasing cost

Fiber civil work cost

Appl ica t ion sc enar io

Legacy network change to BBU installation

New build network (eg. LTE)

Site rental saving

Site rental saving

Site visit cost saving

Network Configuration

UMTS S1/1/1

UMTS S2/2/2

LTE S1/1/1 20MHz

Transport Resource requirement

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Current limitation and suggestion

For operators with abundant optical fibers, BBU center solution can be deployed, otherwise the cost will be high

One access loop, ten BTS One Aggregation Ring,fifteen Access Rings

Backbone Lab CoNew site

Macro BTS w/equipment room

Short distance, no loopprotection

Backbone Lab CorNew site

BBU center i

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U

R

R

U BBU

Site with LegacyMacro BTS equipmentroom

long distance, loopprotection needed

Aggregation Lab

One Backbone Ring, sixAggregation Rings

One Aggregation Ring,

fifteen Access Rings

One Backbone Ring, sixAggregation RingsAggregation Lab

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Outlines

Background

Network Architecture EvolutionCloud RAN Key Challenges Studies


Summary

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Access Ring Aggregation Ring

BB Cloud~10 Site, 5~10km2

Scenario of Cloud BB Deployment

BB Cloud

Macro + SmallCell

Scenario 1 20%~50% capacity Increase bScenario 2

~90% Equipment room saved 51% TCO decreaseScenario 3

Scalable to 200 BBUs

WDM

Scenario 1

Scenario 2 Scenario 3

More

F i b

er r e

q u e s t

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Cloud BB Improve HetNet Capacity by Interference Mitigation

More Cell-Edge UEs , More Intereference, More block

Interference control by Mother-Child Sites

Adaptive ICIC, eICIC, CoMP

Interference analysis

Signal Interference

eICIC

CoMP (CBF/CS, JP)

Protec

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Outlines

Background

Network Architecture EvolutionCloud RAN Key Challenges Studies


Summary

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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 commercialapplication, 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 capacitybased on interference control

3-2 Cloud-RAN

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