singleran cloud bb solution 03

www.huawei.com

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HUAWEI TECHNOLOGIES CO., LTD.

Huawei Cloud BB Solution


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Contents

Challenge and Solution Overview

Cloud BB Hardware Architecture

Cloud BB Coordination Solution


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Why Go for Cloud BB Solution-Saving TCO & Improving QoE

Increasing CAPEX&

OPEX when adding

sites for MBB traffic

Decreasing Cell

Edge Experience

due to interference

Centralized BBU for

decreasing TCO

Coordination

Across BBU

improving QoE

Challenges Cloud BB

Solution

TCO

Edge


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Site Space Saving

Energy Saving

O&M Simplified

Centralized BBU for TCO saving

BBU Coordination for inter CELL coordination

BB Virtualization in future

Based on General Purpose CPU with L1 accelerators;

Low power consumption with high performance

Open API

Cloud BB

Coordinated technology to improve network throughput .

HUAWEIs Understanding of Cloud BB Evolution


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HUAWEI Cloud BB solution overview

Access

Network

solution 1Centralized BBU

Fiber

CPRI

Fiber 10GE

eX2

GE

S1/Se/X2/eX2

GE/10GE

S1/Se/X2/eX2

solution 2Distributed BBU(USU) solution 3Distributed BBU (relaxed backhaul)

GE S1/Se/X2

Intelligent Coordination

UL CoMP Carrier Aggregation (CA) Coordinated Scheduling & Power Control (CSPC) Same Frequency Network(SFN)

Macro Site

RRU


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Industry Standardization Progress

NGMN

NGMN P-CRAN project, start from

march 2011 by

CMCC(CMCC/FT/DT/KT/STK/Telus/Hu

awei/ZTE/ALU/NSN/EricssonIntel)

Phase1: CRAN Architecture,

TCO saving analysis, DU Cloud

interworking concept. eX2 extended

interface concept

Phase2: Function split DU Cloud

and RU, BB virtualization research

ETSI ORI

Open Radio equipment Interface

RU-DU(CPRI) interface open

ORI R1 released in 2012, support

CPRI 4.1, support UMTS/LTE

ORI R2 2013Q1 released, support

CPRI 4.2, support 9.803 Gbps(line

speed)

ORI R3(CPRI 4.2) will release in

2014Q1, support CPRI 4.3, support

GSM CPRI, LTE CPRI compression,

support tree, ring connection

3GPP

Before R12, no research on

Cloud BB

Features which related with

Huawei Cloud BB architecture:

R8:ICIC

R9:None

R10:CA,Comp, eICIC

R11:CA,Comp enhancement

R12:inter site CA


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Cloud BB Global Market Forecast

BBU Stack is becoming important scenario in urban for TCO saving BBU Coordination will deployed firstly in LTE High load network As Small Cell market booming, Cloud BB (Macro with Micro) will deploy in hot part area in UMTS and LTE network.

Traditional Macro

Site BBU Stack

BBU Coordination

Macro with Macro

BBU Coordination

(Macro with Micro)

2012 96.5% 2.5% 0% 0%

2014 97.4% 3% 0.5% 0.1%

2016 90.4% 5% 1.6% 3%


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Contents




HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 9

Analysis of Cloud BB Solutions

Scenario

Centralized BBU Distributed BBU(USU)

Distributed

BBU(Relaxed

Backhaul)

Dependency

Network Latency

(from BBU1 to BBU2) 10us(microsecond) 130us


Cloud BB Architecture & Connection


Centralized BBU Architecture

Distance between BBU&USU:


Centralized BBU Connection Introduction

2nd Level USU

Maximum

120BBUs*36 Cells

Cloud BB

Max. Configuration 1 USU support 10 BBUs Max.(3 baseband for 1 BBU)

1 Cloud BB support 120 BBUs Max. (12 1st Level USUs+6 2nd Level USU)

USU1

USU6

USU7

USU12

BBU1

BBU10

BBU1

BBU10

BBU1

BBU10

BBU1

BBU10

1st Level USU

Centralized Cloud BB Specification

USU1

USU2

USU6


Distributed BBU Architecture (USU)

Distributed Cloud BB

eX2 over Optical Fiber

Backhaul

Network

S1/X2

Recommended Application Scenario: Request small scale centralized BBU and large area coordination

Deploy optical transmission for eX2

RRU

BBU

BBU

RRU

RRU

RRU

BBU

S1/X2

1st level USU

BBU-1st Level USU distance: 10km BBU-BBU max. distance: 20km E2E time delay:


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Distributed BBU (USU) Connection Introduction

Distributed Cloud BB Specification

Max.

Configuration

1 USU support 25 BBUs Max.

1 Cloud BB support 150 BBUs Max.

(6*1st Level USUs)

BBU25

2nd Level USU

1st Level USU1

3910

10GE 10GE 10GE 10GE

40GE 40GE

BBU1

1st Level USU 6

BBU25 BBU1

UCCU

UCCU

UCCU UCCU


Distributed Cloud BB (Relaxed Backhaul)

S1/X2

Reuse the legacy S1/X2 backhaul to carry the coordination data No need to deploy dedicated optical transmission network Coordination gain depends on the latency of the transmission

BBU

Backhaul

Network

Coordination data transfer over legacy Backhaul

Distributed BBU (Relaxed Backhaul) Architecture

BBU

BBU

S1/X2

RRU

BBU

RRU

BBU

RRU

RRU

RRU

RRU

BBU

BBU

RRU


Transmission Solution for

Front Haul in Centralized Cloud BB

& in Distributed Cloud BB


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Solution Dark Fiber (P2P Fiber) Passive WDM Active WDM

Tech RRU chain or loop;

BBU/RRU insert long distant white

Optic Mode

BBURRU insert long-distant color Optic mode, passive WDM module

BBURRU are connected by short distant optic directly, BB-RF over OTN

Scenario Sufficient fiber resource Insufficiency fiber resource Lack of fiber resource

BW. 10Gbps 80Gbps/800Gbps 80Gbps/800Gbps

Latency/

Jitter

5us/km

0ns

5us/km

1ns


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Solution Micro Wave (Not Recommend)

Tech Only Eband can be used( 71-76,81-86 GHz)

Scenario Lack of fiber resource

BW. 2.5G

Latency/

Jitter

One hop 45us(next release 35us) Jitter 20ns. The current version only support one hop, 2 hops is planning

Distance 1KM

Pros Saving more fiber

Cons Very Limited BW.

Front Haul Transmission Solution (Micro Wave: Not Recommend)


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Dark Fiber Case for Centralized BBU Deployment in

JAPAN


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LGU+ Korea CPRI over OTN Solution

CP6 CP6

OSN1800 OSN1800

40 * OTU2

4.9G CPRI

4.9G CPRI

4.9G CPRI

4.9G CPRI

Working

Protection

OTU2

OTU2

OTU2

OTU2

Site 1

2.6GHz LTE-A RRU

OSN 1800

4.9G CPRI Remote Site

Gateway

Core Mobile

Backhaul

Remote Site

Huawei: 18*RRUs per BBU/DU

CRPI over OTN (w/p)

OSN 1800

Remote Site

OSN 1800

BBU Core Site

Cloud BB OSN 1800

4.9G CPRI

4.9G CPRI

Site 2

Site n


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BBU Centralization may decrease device cost

including BBP, MPT & BBU box etc.

BBU Centralization need 40~50 times of CPRI

transmission backhaul

Coordinated feature, such as Inter-site CoMP, increase cell edge throughput & improve KPI

Deploying coordinated feature need additional switching board and box.

Considering the benefits and costs of Cloud BB, finding balance point in deploying Cloud BB at this stage is Important

HUAWEIs View on Centralized Cloud BB Pros Vs. Cons

PROS Cons


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TCO Saving Case Analysis by China Mobile

TCO Saving Case in China Mobile

Analysis Baseline Based on indoor DBS China southern urban city, 7 years TCO Fiber linked to site directly, not include transmission deployment

CAPEX saving by 30% Roof construction/Air Conditioner/Civil

Work/Equipment

OPEX saving by 50% Site Rental greatly reduced

CAPEX Reducing

30% 50%

OPEX Reducing

50%

Statistics from China Mobile CRAN white paper


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3 BBU centralized, TCO can save 24.5% using direct fiber. 10 sites is balancing point. Huawei Viewpoint

China Mobile

Dutch Telecom

(fiber to site penetration: 95%)

8~10 BBU centralized is recommended for TCO saving.

(Fiber to site penetration: 80%) Small scale is economical (~20 sites)

Recommend Number of BBUs for Cloud BB


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CPRI interface transmission optimization

BW (Gbps)

Bandwidth reduction to: 1/3

Data: Huawei Research

0

0.5

1

1.5

2.0

2.5

2011 2012 2014

2.5G

1.25G

800M

50%

67%

CPRI Compression

BW (Gbps)

CPRI BB-RF

Interface Re-definition

BBU L1

L2

L3

TRP

BBU

L1

L2

L3

TRP

RF

RF

Bandwidth reduction to: 1/10 Less CoMP gain against traditional DBS Difficult BB upgrade Recommended


Contents





Huawei Cloud BB Coordination Solution

SFN ASFN

Interleaving resource

CSPC

Eliminate the cell edge UL CoMP CA

Joint Process

IP RAN Distributed Macro

Cloud BB Localized Macro

Indoor Coverage Eg. Lampsite Hetnet

Eg. Micro


CA works everywhere in Cloud BB scenario CA Scheduling with Load balance

CA user Non-CA user

F1

F2

Cell 0

Cell 2

F1

F2 F2

Cell 1

Intelligent CA to aggregate all possibilities

Commercial 2014H1

Increases user throughput Increase spectrum resource

Cell 0 + Cell1 CA Cell 0 + Cell 2 CA

Cloud BB Combine resources for its serving cell with one

frequency and a number of other cells with different

frequencies.

Load balance based on

both control plane and

user plane resources.

Average

Throughput Gain ~30%


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Uplink CoMP introduces fastest uplink cell edge speed

UL CoMP Principle

Intra-Site Uplink CoMP (eRAN3.0) Inter-Site Uplink CoMP (eRAN7.0)

15%~200% cell edge gain;

9%~20% cell average gain

UE1: in cell edge, gain from joint receiving

UE2 in cell center, gain from interference attenuation

10%~200% cell edge gain;

7%~10% cell average gain

RRU

UE2 UE1

Base

Band

cell edge

BBU Cloud

BB


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Adaptive SFN/SDMA eliminates cell edge

SFN - Combine multiple cells into one

logical cell SFN (Single Frequency Network) applicable scenarios

Scenarios 1: High site density, short Inter-site distance

Scenarios 2: Combine indoor coverage and outdoor coverage

Normal

cells

SFN

Adaptive SFN /

SDMA

Scenario 3: High-speed railway coverage

Benefits: Reduce handoff, avoid call drop, improve user experience in cell edge

SFN

72% throughput gain (vs.

normal SFN)

SFN


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CSPC improves cell edge throughput 30~220%

CSPC:(Coordinated Scheduling & Power Control )

UE1

CloudBB

UE2

Cell1 Cell2

Cell edge throughput: 150%200% Gain

Cell average throughput: 25%40% Gain

Millisecond level delay based on

Cloud BB

architecture

RB (Resource Block) level

Adjust Tx power level in adjacent cells per

TTI

Require time sync: 1.5s

Fast Coordination RB level

coordination TTI level

power control

* Available in eRAN7.0

Field Test in shanghai : 8 cells, 3 users on

center cell, 7 users on neighbor cells


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Case Study: Huawei Cloud BB in Japan, Softbank(1)

Reusing Existing PHS sites Supper dense BTS deployment

Low TCO & High Performance of the super dense network is most

concerned

160K PHS site across the whole country

Omni antenna, Multi-antenna application

Limited site space

High performance:

High BTS density: ISD = 100 ~ 200m

Need Interference control


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Case Study: Huawei Cloud BB in Japan, Softbank (2)

Centralized Cloud BB for Saving TCO Improved Performance

Easy Network Expansion Saving Site Rental Cost due to centralized BBU

Reuse the dark fiber w/o additional cost on fronthaul

High Network Reliability

Improved SINR: 10dB

By using SFN @ Cloud BB

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

35pt

Font to be used by customers and

partners :

18pt

Font to be used by customers and

partners :

LGU+ Background:

Multi-band coexisting

900M

1800M

2100M

2600M

10M

20M 40M

30M

3M

15M

LGU+ Background:

Rich in fibers & sites

Large Scale Cloud BB Help to reduce 70% Site Rental Cost

Large Scale Cloud BB

100+ Golden Cluster Each Golden Cluster with 10 centralized

BBU

CA Based on Cloud BB to Getting Better User Experience

Quick Network Roll-out

Improved Network Performance

LGU+, Korea

Dec Jan Feb

Site On Air

Cell On Air 300

2000 2000 5000 4500

12000

To stabilize KPI for phase 1 Phase 2: CA, UL CoMP, DL CoMP CS

Case Study: Huawei Cloud BB in LGU+

Cloud BB

USU

Front

Haul

macromacro

360 cells per site


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Huawei Cloud BB Advantages Summery

Huawei Cloud BB Advantages:

Flexible Cloud BB Scenarios: Centralized BBU , Distributed BBU(USU), Distributed BBU(Lite)

Highest Specification Centralized(120 BBU,360 cells),Distributed BBU(150~300 BBU)

USU Synchronization One Clock source for all BBUs through USU

Transmission Support flexible transmission solution, including CPRI Compression, WDM

Intelligent coordination : inter-site CA, inter-site SFN , CSPC, inter-site UL Comp


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Cloud BB Deployment Suggestion

Very High Request on Transmission Resource, Fiber to Site is Mandatory

Centralized Cloud BB request 20 to 25 times transmission resource.

Distributed Cloud BB(USU) request at least 10GE in each site.

Cloud BB suggested to deploy in dense Urban area(Dense site , high

traffic scenario)

For CSPC, only the network load reach about 30%, the gain make sense

For inter site CA & Comp, the LTE sites is dense, it has higher gain.


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APPENDIX

USU Product Introduction & Connection


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USU3910 Introduction

USU3910

UEFU board

ULPU board

UEFU

Switching Unit for BBUs

Support 2-Level architecture

USU3910 introduction

Module Specification Remark

USU3910 86mm(H) *

442mm(W) *

420mm(D)

Temperature : -5~50

UEFU: Switch

Fabric Board 12*CXP interface

&

14*SFP interface

For clock and control

panel data inter-

connection

ULPU: Line

Process Board 30 QSFP

For BBU or USU3910

connection

HEI: QSFP module. Connecting to BBP HEI port, or

UCCU QSFP port on BBU

Fabric: CXP module. Connecting to CXP Fabric port

between level 1 & level 2 USU3910

CI UL: SFP module. Uplink CI port connecting to CI

DL port on level 2 USU3910

CI DL: SFP module. Downlink CI port connecting to CI

UL port on USU3910 or UMPT


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Centrialized Architecture Connection Level 1: BBU & USU

Fiber between ULPU QSFP and

BBP HEI port, with IBDL (Internal

Baseband Data Link) data

Fiber between UEFU SFP and

UMPT CI port, with ICDL (Internal

Control Data Link) data

Max. Distance 100 meters between USU and BBU

Max. Configuration 1 USU support 5 BBUs Max. (6 baseband for 1 BBU);

Or 1 USU support 10 BBUs Max.(3 baseband for 1 BBU)

ULPU

UEFU

UPEU

UPEU

FAN

UMPT

BBP

BBP

BBP

BBP

BBP

BBP

UPEU

UPEU

FAN

UMPT

BBP

BBP

BBP

BBP

BBP

BBP

BBU0 BBU4


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Centrialized Architecture Connection Leve 2: USU & USU

UEFU

UEFU

UEFU

UEFU

ULPU

UEFU

ULPU

UEFU

UEFU

UEFU

ULPU

UEFU

Fiber between two CXP ports,

with IBDL (Internal Baseband

Data Link) data

Fiber between two CI ports, with

ICDL (Internal Control Data Link)

data

Max. Distance 100 meters between USU and USU

Max. Configuration

Max 12 Level 1 USU

Max 6 Level 2 USU

Max 120 BBUs connection under 2 Level USU3910 architecture

USU0 USU1 USU5

USU0 USU1 USU11

Level 2

Level 1


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Distributed Architecture Connection Leve 1: BBU & USU

ULPU

UEFU

UPE

U

UPEU

FAN

UMPT

BBP

BBP

BBP

BBP

UCCU

BBP

UPE

U

UPEU

FAN

UMPT

BBP

BBP

BBP

BBP

UCCU

BBP

UPE

U

UPEU

FAN

UMPT

BBP

BBP

BBP

BBP

UCCU

BBP

Fiber between ULPU QSFP and

UCCU QSFP port, with IBDL+ICDL

data

QSFP QSFP QSFPUCCU RUN

ALM

ACTQSFP QSFP QSFP

QSFP connect to BBP HEI port

QSFP connect to ULPU QSFP port in level 1 USU

Fiber between Level 1 and Level 2

USU

Max. Distance Max 10 km between USU and BBU. Max 20km between 2 BBUs

Max. Configuration 1 USU support 25 BBUs Max

Uplink to level 2 USU

BBU0 BBU1 BBU24


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Distributed Architecture Connection Leve 2: USU & USU

ULPU

UEFU

ULPU

UEFU

ULPU

UEFU

USU0

Level 2

Level 1

USU5

Fiber between Level 1 and Level 2

USU

Max. Distance Max 10 km between USU and BBU. Max 20km between 2 BBUs

Max. Configuration

Max 6 Level 1 USU

Max 1 Level 2 USU

Max 150 BBUs connection under 2 Level USU3910 architecture


Cloud BB Solution Architecture Overview

sRIO/sCPRI

10GE/40GE

BBU

BB

MPT

ICDL

USU3910

BBU

BB

MPT

BBU

BB

MPT

USU3910

USU3910

BBU

UCCU

MPT

USU3910

BBU

UCCU

MPT

BBU

UCCU

MPT

USU3910

USU3910

sRIO/sCPRI

Eth

Eth Eth

BBU

MPT

BBU

MPT

GE

Eth

Access Network

Access Network

Access Network

1 2 3

10GE MSU

BB

U

BBU sRIO/sCPRI

Core Network

Centralized BBU

Distributed BBU(USU)

Distributed BBU(Lite)

USU

BBU

10GE USU

BBU BBU

G

E

Thank you www.huawei.com

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Copyright 2011 Huawei Technologies Co., Ltd. All Rights Reserved. The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.

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