SingleRAN Cloud BB Solution 03

Huawei Cloud BB Solution

www.huawei.com

HUAWEI TECHNOLOGIES CO., LTD.

Contents 

Challenge and Solution Overview



Cloud BB Hardware Architecture



Cloud BB Coordination Solution


Page 2

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

Increasing CAPEX& OPEX when adding sites for MBB traffic

Centralized BBU for decreasing TCO

Challenges

Cloud BB Solution

Decreasing Cell Edge Experience due to interference

Coordination Across BBU improving QoE

Edge


Page 3

HUAWEI’s Understanding of Cloud BB Evolution BB Virtualization in future  Based on General Purpose CPU with L1 accelerators;

Cloud BB

 Low power consumption with high performance  Open API

BBU Coordination for inter CELL coordination  Coordinated technology to improve network throughput . Centralized BBU for TCO saving  Site Space Saving  Energy Saving  O&M Simplified


Page 4

HUAWEI Cloud BB solution overview

Macro Site

Intelligent Coordination 消费者也是多任务的，他们可能在任何时间，任何地点开  UL CoMP 展业务，营销者的尖叫不能只是单一渠道的活动，必须要横  Carrier Aggregation (CA) 扩所有媒介和渠道，与消费者行为相符合。  Coordinated Scheduling & Power Control (CSPC)  Same Frequency Network(SFN)

RRU

GE/10GE S1/Se/X2/eX2

Fiber CPRI

Access Network

GE S1/Se/X2

GE S1/Se/X2/eX2

Fiber 10GE eX2

solution 1：Centralized BBU HUAWEI TECHNOLOGIES CO., LTD.

solution 2：Distributed BBU(USU) Page 5

solution 3：Distributed BBU (relaxed backhaul)

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 


3GPP

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

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 

Page 6

Cloud BB Global Market Forecast BBU Coordination (Macro with Micro)

Traditional Macro Site

BBU Stack

BBU Coordination （Macro with Macro）

2012

96.5%

2.5%

0%

0%

2014

97.4%

3%

0.5%

0.1%

2016

90.4%

5%

1.6%

3%

 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.


Page 7

Contents 









Page 8

Analysis of Cloud BB Solutions BBU hotel

USU3910 USU3910

Dependency

Scenario

G E

10GE BBU

BBU

Centralized BBU

Distributed BBU(USU)

Distributed BBU(Relaxed Backhaul)

≤10us(microsecond)

≤130us

<4ms(millisecond)

Backhaul

Dedicated

Dedicated Network

Reuse Backhaul Network

Bandwidth per BBU

Dedicated

≥ 1*10GE

≥ 100Mbps

Assumption baseline : 100%

80%

20~30%

Network Latency (from BBU1 to BBU2)

Coordinator Feature Gain Comparison HUAWEI TECHNOLOGIES CO., LTD.

Huawei proprietary. No spread without permission.

Page 9

Cloud BB Architecture & Connection



Page 10

Centralized BBU Architecture USU BBU

S1/X2 Centralized BBU Coordination data transfer across centralized BBU

Backhaul Network

eX2 over Optical Fiber Centralized Cloud BB RRU RRU RRU

RRU RRU



Recommended Application Scenario: Deploy in areas with sufficient fiber for saving OPEX and improving user experience ① Distance between BBU&USU: <100 m ② Distance between 1st Level USU& 2nd Level USU:<100m

Page 11

Centralized BBU Connection Introduction USU1

USU2

USU6

… USU1

…

USU6

2nd Level USU USU7

USU12

1st Level USU

…

… BBU1

…

… BBU10

BBU1

BBU10

BBU1

Maximum 120BBUs*36 Cells

… BBU10

BBU1

BBU10

Centralized Cloud BB Specification 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)



Page 12

Cloud BB

Distributed BBU Architecture (USU)

Backhaul Network

RRU

eX2 over Optical Fiber

BBU

S1/X2

RRU

Distributed Cloud BB BBU 1st level USU

RRU

S1/X2

RRU BBU

①BBU-1st Level USU distance: 10km ②BBU-BBU max. distance: 20km ③E2E time delay:<130us

BBU


Recommended Application Scenario: Request small scale centralized BBU and large area coordination Deploy optical transmission for eX2


Page 13

Distributed BBU (USU) Connection Introduction Distributed Cloud BB Specification 2nd Level USU

Max. Configuration

40GE

40GE

1st Level USU1 3910 10GE

…

10GE

1st Level USU 6

10GE

…

… BBU1

BBU25

UCCU


10GE

UCCU

BBU1

UCCU

BBU25

UCCU

Page 14

1 USU support 25 BBUs Max. 1 Cloud BB support 150 BBUs Max. (6*1st Level USUs)

Distributed BBU (Relaxed Backhaul) Architecture Backhaul Network

Coordination data transfer over legacy Backhaul

S1/X2

S1/X2 RRU RRU

RRU

RRU

RRU BBU

BBU

BBU

BBU

RRU BBU

BBU

Distributed Cloud BB (Relaxed Backhaul)

BBU

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



RRU

Page 15

Transmission Solution for Front Haul in Centralized Cloud BB & in Distributed Cloud BB



Page 16

Front Haul Transmission Solution (Optical) RRU

BBU

topology :Ring, Tree, Chain RRU

1

Dark Fiber

RRU

Active WDM

Passive WDM topology :Ring, Tree, Chain RRU 2

topology :Ring, Tree, Chain RRU

BBU Passive WDM

3

Passive WDM

BBU

Solution

Dark Fiber (P2P Fiber)

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

Sufficient fiber resource

Insufficiency fiber resource

Lack of fiber resource

BW.

10Gbps

80Gbps/800Gbps

80Gbps/800Gbps

Latency/ Jitter

5us/km 0ns

5us/km ±1ns

<21us + 5us/km ±3ns

Distance

20KM

20KM

15.8KM

Pros

Mature technical

Saving fiber

Saving more fiber

Cons

Most fiber consuming

High Maintenance cost

High device cost

Scenario


Passive WDM

Active WDM

Active WDM

Page 17

Front Haul Transmission Solution (Micro Wave: Not Recommend)

Solution Tech

Scenario BW. Latency/ Jitter Distance

Micro Wave (Not Recommend) Only Eband can be used( 71-76,81-86 GHz)

Lack of fiber resource 2.5G One hop 45us(next release 35us)， Jitter 20ns. The current version only support one hop, 2 hops is planning 1KM

Pros

Saving more fiber

Cons

Very Limited BW.


Page 18

Dark Fiber Case for Centralized BBU Deployment in JAPAN


Page 19

LGU+ Korea CPRI over OTN Solution Remote Site

Site 1

Site 2

4.9G CPRI

Remote Site

BBU Core Site

OSN 1800

Huawei: 18*RRUs per BBU/DU

4.9G CPRI

CRPI over OTN (w/p)

Mobile Backhaul

OSN 1800

Core Gateway

OSN 1800

4.9G CPRI Site n 2.6GHz LTE-A RRU

Cloud BB

OSN 1800

Remote Site

4.9G CPRI

OTU2

Working

OTU2

4.9G CPRI

40 * OTU2 CP6 OTU2 4.9G CPRI


Protection

OSN1800

OTU2CP6

OSN1800

Page 20

4.9G CPRI

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

Cons

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


Page 21

TCO Saving Case in China Mobile TCO Saving Case Analysis by China Mobile

CAPEX Reducing 30%

OPEX Reducing 50% 50%

Statistics from “China Mobile CRAN white paper”

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

Page 22

Recommend Number of BBUs for Cloud BB

Huawei Viewpoint

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

(fiber to site penetration: 95%)

China Mobile

8~10 BBU centralized is recommended for TCO saving.

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


Page 23

CPRI interface transmission optimization CPRI Compression BW (Gbps)

Interface Re-definition BW (Gbps)

2.5

2.5G

50%

2.0 1.5

BBU

1.25G

800M

0.5 0

CPRI

67%

1

2011

RF L1

RF

2012

2014

BB-RF

BBU L1 L2 L3 TRP

L2 L3 TRP

Data: Huawei Research

•Bandwidth reduction to: 1/3

Recommended HUAWEI TECHNOLOGIES CO., LTD.

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

Page 24

Contents

Page 25











Huawei Cloud BB Coordination Solution Interleaving resource  CSPC Joint Process

 UL CoMP  CA

Eliminate the cell edge  SFN  ASFN

Cloud BB Localized Macro

IP RAN Distributed Macro

Hetnet Eg. Micro

Page 26


Indoor Coverage Eg. Lampsite

Intelligent CA to aggregate all possibilities CA works everywhere in Cloud BB scenario

CA Scheduling with Load balance

Cell 0 + Cell1 CA Cell 0 + Cell 2 CA Cell 1 F2

Cell 2 F2

~30%

F2

Average Throughput Gain

 Load balance based on

Cell 0

both control plane and F1

user plane resources.

F1

Increases user throughput Increase spectrum resource CA user Cloud BB Combine resources for its serving cell with one frequency and a number of other cells with different frequencies. Commercial 2014H1

Page 27


Non-CA user

Uplink CoMP introduces fastest uplink cell edge speed 

UL CoMP Principle Base Band

RRU

UE1

UE2

cell edge • UE1: in cell edge, gain from joint receiving

• UE2 in cell center, gain from interference attenuation HUAWEI TECHNOLOGIES CO., LTD.

BBU

Cloud BB

Intra-Site Uplink CoMP (eRAN3.0)

Inter-Site Uplink CoMP (eRAN7.0)

• 10%~200% cell edge gain;

• 15%~200% cell edge gain;

• 7%~10% cell average gain

• 9%~20% cell average gain

Page 28

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 Normal cells

SFN • Scenarios 2: Combine indoor coverage and outdoor coverage

SFN

SFN Adaptive SFN / SDMA 72% throughput gain (vs. normal SFN)


• Scenario 3: High-speed railway coverage

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

Page 29

CSPC improves cell edge throughput 30~220% CSPC:(Coordinated Scheduling & Power Control )

Field Test in shanghai : 8 cells, 3 users on center cell, 7 users on neighbor cells

CloudBB

UE1

UE2

Cell1

Cell2 * Available in eRAN7.0

Fast Coordination • Millisecond level delay based on Cloud BB architecture

RB level coordination • RB (Resource Block) level


TTI level power control • Adjust Tx power level in adjacent cells per TTI • Require time sync: ±1.5µs

• Cell edge throughput: 150%～200% Gain • Cell average throughput: 25%～40%

Page 30

Gain

Case Study: Huawei Cloud BB in Japan, Softbank(1) Reusing Existing PHS sites

160K PHS site across the whole country

Supper dense BTS deployment

High performance:

• Omni antenna, Multi-antenna application

• High BTS density: ISD = 100 ~ 200m

• Limited site space

• Need Interference control

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


Page 31

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


Page 32

Case Study: Huawei Cloud BB in LGU+ Large Scale Cloud BB Help to reduce 70% Site Rental Cost

LGU+ Background: Multi-band coexisting 2600M

20M

Large Scale Cloud BB • 100+ Golden Cluster • Each Golden Cluster with 10 centralized BBU

40M

2100M

15M

1800M

10M

900M

30M

360 cells per site

3M

LGU+, Korea CA Based on Cloud BB to Getting Better User Experience

 Quick Network Roll-out

LGU+ Background: Rich in fibers & sites macro

macro

Cloud BB

300

2000

2000

5000

4500

12000

Site On Air Cell On Air

USU

Front Haul

Dec

Jan

Feb

 Improved Network Performance • To stabilize KPI for phase 1 • Phase 2: CA, UL CoMP, DL CoMP CS


Huawei Confidential

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


Page 34

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.


Page 35

APPENDIX

USU Product Introduction & Connection


Page 36

USU3910 Introduction USU3910 USU3910 introduction • Switching Unit for BBUs

ULPU board

• Support 2-Level architecture HEI: 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 interconnection

ULPU: Line Process Board

30 QSFP

For BBU or USU3910 connection

QSFP module. Connecting to BBP HEI port, or UCCU QSFP port on BBU

UEFU board

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


Page 37

Centrialized Architecture Connection– Level 1: BBU & USU Fiber between ULPU QSFP and BBP HEI port, with IBDL (Internal Baseband Data Link) data

UEFU

ULPU

F A N

BBP

BBP

BBP

BBP

Fiber between UEFU SFP and UMPT CI port, with ICDL (Internal Control Data Link) data

UPEU BBP UPEU UMPT

BBP

…

F A N

BBP

BBP

BBP

BBP

UPEU BBP UPEU BBP

UMPT

BBU4

BBU0

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)


Page 38

Centrialized Architecture Connection– Leve 2: USU & USU Level 2

USU0

USU1

UEFU

UEFU

UEFU

UEFU

Fiber between two CXP ports, with IBDL (Internal Baseband Data Link) data

USU5

…

UEFU UEFU

Fiber between two CI ports, with ICDL (Internal Control Data Link) data

Level 1 UEFU

UEFU

ULPU

ULPU

USU0

…

UEFU ULPU

USU1

USU11

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


Page 39

Distributed Architecture Connection– Leve 1: BBU & USU Uplink to level 2 USU

Fiber between ULPU QSFP and UCCU QSFP port, with IBDL+ICDL data

UEFU ULPU

Fiber between Level 1 and Level 2 USU

F A N

BBP BBP BBP BBP

UCCU BBP

UPE U

F A N

UPEU

UMPT

BBP BBP BBP BBP

UCCU BBP UMPT

BBU0

UCCU

BBU1

UPE U UPEU

…

F A N

BBP BBP BBP BBP

UCCU BBP UMPT

UPE U UPEU

BBU24

QSFP connect to BBP HEI port QSFP

QSFP

QSFP

QSFP QSFP

QSFP

RUN ALM ACT

QSFP connect to ULPU QSFP port in level 1 USU

Max. Distance

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

Max. Configuration

1 USU support 25 BBUs Max


Page 40

Distributed Architecture Connection– Leve 2: USU & USU Level 2 UEFU

Fiber between Level 1 and Level 2 USU

ULPU

Level 1

…

UEFU ULPU

USU0

UEFU ULPU

USU5

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


Page 41

Cloud BB Solution Architecture Overview Core Network

sRIO/sCPRI 10GE/40GE

Access Network 1

Centralized BBU

Access Network

3

2

Distributed BBU(USU)

USU3910

sRIO/sCPRI USU3910

GE

Access Network

USU3910

MSU

10GE

Eth

Distributed BBU(Lite)

BBU

BB U

USU3910

USU3910

sRIO/sCPRI ICDL

Eth

USU3910 Eth

Eth

BBU

BBU

BBU

BBU

BBU

BBU

BB

BB

BB

UCCU

UCCU

UCCU

MPT

MPT

MPT

MPT

MPT

MPT

BBU

BBU

MPT

MPT

USU USU

BBU HUAWEI TECHNOLOGIES CO., LTD.

G E

10GE

BBU

BBU


Page 42

Thank you www.huawei.com 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.

SingleRAN Cloud BB Solution 03

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