SingleRAN Cloud BB Solution 03

(1)

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(2)

Page 2

HUAWEI TECHNOLOGIES CO., LTD.

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

Challenge and Solution Overview



Cloud BB Hardware Architecture

(3)

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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

(4)

Page 4



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 .

(5)

HUAWEI Cloud BB solution overview

Access

Network

Fiber

CPRI

Fiber 10GE

eX2

GE

S1/Se/X2/eX2

GE/10GE

S1/Se/X2/eX2

GE

S1/Se/X2

消费者也是多任务的，他们可能在任何时间，任何地点开 展业务，营销者的尖叫不能只是单一渠道的活动，必须要横 扩所有媒介和渠道，与消费者行为相符合。

Intelligent Coordination

 UL CoMP

 Carrier Aggregation (CA)

 Coordinated Scheduling & Power Control (CSPC)

 Same Frequency Network(SFN)

Macro Site

RRU

(6)

Page 6

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

(7)

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%

2014

97.4%

3%

0.5%

0.1%

(8)

Page 8



Challenge and Solution Overview



Cloud BB Hardware Architecture

(9)

Analysis of Cloud BB Solutions

Scenario

Centralized BBU

Distributed BBU(USU)

Distributed

BBU(Relaxed

Backhaul)

De

pe

nd

en

cy

Network Latency

(from BBU1 to BBU2)

≤10us(microsecond)

≤130us

<4ms(millisecond)

Backhaul

Dedicated

Dedicated Network

Reuse Backhaul

Network

Bandwidth per BBU

Dedicated

≥ 1*10GE

≥ 100Mbps

USU3910

BBU hotel

10GE

USU3910

BBU

G

E

(10)

HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 10

(11)

Centralized BBU Architecture

① Distance between BBU&USU: <100 m

② Distance between 1st_{Level USU& 2}nd_Level

USU:<100m

Centralized Cloud BB

RRU

eX2 over Optical Fiber

Centralized BBU

Coordination data transfer across

centralized BBU

USU

BBU

Backhaul

Network

Recommended Application Scenario:

Deploy in areas with sufficient fiber for

saving OPEX and improving user experience

(12)

Centralized BBU Connection Introduction

2

nd

_{Level USU}

Maximum

120 BBUs*

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 1

st

Level USUs+6 2

nd

Level USU)

USU1

USU6

USU7

USU12

…

BBU1

BBU10

…

BBU1

BBU10

…

BBU1

BBU10

…

BBU1

BBU10

…

1

st

_{Level USU}

Centralized Cloud BB Specification

…

(13)

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

RRU

BBU

S1/X2

1

st

_{level USU}

①BBU-1

st

_{Level USU distance:}

_10km

②BBU-BBU max. distance:

20km

③E2E time delay:<

130u

s

BBU

(14)

Page 14

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*1**

st

Level USUs)

BBU25

2

nd

_{Level USU}

1

st

_{Level USU1}

3910

10GE 10GE 10GE 10GE

40GE 40GE

BBU1

1

st

_{Level USU 6}

…

BBU25

BBU1

UCCU UCCU UCCU UCCU

(15)

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

BBU

Backhaul

Network

Coordination data transfer over legacy Backhaul

Distributed BBU (Relaxed Backhaul) Architecture

BBU

S1/X2

RRU

BBU

RRU

BBU

RRU

BBU

RRU

(16)

Transmission Solution for

Front Haul in Centralized Cloud BB

& in Distributed Cloud BB

(17)

Solution

Dark Fiber (P2P Fiber)

Passive WDM

Active WDM

Tech

RRU chain or loop;

BBU/RRU insert long distant

white

Optic Mode

BBU、RRU insert long-distant

color Optic

mode

, passive WDM module

BBU、RRU 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

Latency/

Jitter

5us/km

0ns

5us/km

±1ns

<21us + 5us/km

±3ns

Distance

20KM

15.8KM

Pros

Mature technical

Saving fiber

Saving more fiber

Cons

Most fiber consuming

High Maintenance cost

High device cost

RRU

BBU

Dark Fiber

topology :Ring, Tree, Chain

Active WDM

RRU

BBU Active WDM

topology :Ring, Tree, Chain

RRU _{Passive WDM}BBU

Passive WDM

topology :Ring, Tree, Chain Passive WDM 1 2 3

RRU

_RRU

(18)

Page 18

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.

(19)

Dark Fiber Case for Centralized BBU Deployment in

JAPAN

(20)

Page 20

LGU+ Korea CPRI over OTN Solution

CP6

OSN1800

40 * OTU2

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

(21)

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

HUAWEI’s View on Centralized Cloud BB – Pros Vs. Cons

PROS

Cons

(22)

Page 22

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”

(23)

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)

(24)

Page 24

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

• Bandwidth reduction to:

1/10

• Less CoMP gain against traditional DBS

• Difficult BB upgrade

(25)



Challenge and Solution Overview



Cloud BB Hardware Architecture

(26)

Page 26

_{HUAWEI TECHNOLOGIES CO., LTD.}

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

(27)

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



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

(28)

Page 28 HUAWEI TECHNOLOGIES CO., LTD.

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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

(29)

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

(30)

Page 30

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: ±1.5µs

Fast Coordination RB level

coordination

TTI level power control

* Available in eRAN7.0

Field Test in shanghai : 8 cells, 3 users on

(31)

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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

(32)

Page 32

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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

(33)

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

Case Study: Huawei Cloud BB in LGU+

Cloud BB USU Front Haul macro macro

(34)

Page 34

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

(35)

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

(36)

Page 36

APPENDIX

(37)

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USU3910 Introduction

USU3910

UEFU board

ULPU board

• 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

(38)

Page 38

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 F A N UMPT BBP BBP BBP BBP BBP BBP UPEU UPEU F A N UMPT BBP BBP BBP BBP BBP BBP

…

BBU0

BBU4

(39)

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

(40)

Page 40

Distributed Architecture Connection– Leve 1: BBU & USU

ULPU UEFU UPE U UPEU F A N UMPT BBP BBP BBP BBP UCCU BBP UPE U UPEU F A N UMPT BBP BBP BBP BBP UCCU BBP UPE U UPEU F A N UMPT BBP BBP BBP BBP UCCU BBP

…

Fiber between ULPU QSFP and

UCCU QSFP port, with IBDL+ICDL

data

QSFP QSFP QSFP UCCU RUN ALM ACT QSFP 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

(41)

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

(42)

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 _NetworkAccess _NetworkAccess

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

G

E

(43)

Thank you

www.huawei.com

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.

SingleRAN Cloud BB Solution 03

Contents



Challenge and Solution Overview



Cloud BB Hardware Architecture

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

Challenges

Cloud BB

Solution



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 .

HUAWEI Cloud BB solution overview

Access

Network

Fiber

CPRI

Fiber 10GE

eX2

GE

S1/Se/X2/eX2

GE/10GE

S1/Se/X2/eX2

GE

S1/Se/X2

Intelligent Coordination

 UL CoMP

 Carrier Aggregation (CA)

 Coordinated Scheduling & Power Control (CSPC)

 Same Frequency Network(SFN)

Macro Site

RRU

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