SingleRAN Cloud BB Solution 03
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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
Challenge and Solution Overview
Cloud BB Hardware Architecture
Cloud BB Coordination Solution
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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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 10
Cloud BB Architecture & Connection
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 11
Centralized BBU Architecture
Distance between BBU&USU:
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 12
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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 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
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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 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 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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 16
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
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Contents
Challenge and Solution Overview
Cloud BB Hardware Architecture
Cloud BB Coordination Solution
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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
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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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
35pt
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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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Page 41 HUAWEI TECHNOLOGIES CO., LTD.
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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
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HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 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
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
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Thank you www.huawei.com
35pt
: R153 G0 B0
:
FrutigerNext LT Medium
: Arial
32pt
: R153 G0 B0
22pt
) :18pt
:
FrutigerNext LT Regular
: Arial
20pt
):18pt
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.