![HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 18
Cloud BB, Evolved Radio
2016Q22015Q22014Q2
SFN
Cloud BB
Inter-site CA
CoMP
CSPC
SRAN10.1
•UCCU: used in BBU, support
10GE
•USU3910
• Centralized:60 BBU
• Distributed:300 BBU
SRAN11.1
•USU3910: Centralized 2-
level USU backup
•Centralized Cloud BB
•Distributed Cloud BB
•Centralized Cloud BB
•Coordinated Scheduling
based Power Control [Cloud
BB]
•Inter-eNodeB UL CoMP
[Cloud BB]
•Inter-site Adaptive
SFN/SDMA [Cloud BB]
•Inter Site CA based on
Relaxed Backhaul
•DL CoMP [Cloud BB]
•DPS](https://image.slidesharecdn.com/huaweicloudbbsolutionintroduction-181203045142/85/Huawei-cloud-bb-solution-introduction-18-320.jpg)
![HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 23
•CA Activation Ratio 85% 98%
relaxed backhaul
one way delay<4ms
GPS
GB/2.6G(20MHz) HUT/1.8G (10MHz)
BBU BBU
IEEE
1588V2
Inter-site CA
>1.8x peak rate
CA everywhere bring consistent user experience
Area
P/S
CC
Band
CA
Activation
Ratio
CC THP
[Mbps]
Total
THP
[Mbps]
YangCheo
n-gu
PCC 2.6G
98.91%
93.35
122.68
SCC 800M 29.34
Case: LGU+ Inter-site CA @CloudBB(eRAN7.0)
IP
Inter-Site CA @ Relaxed Backhaul
(eRAN8.1&eRAN11.1)
Inter-Site CA @ CloudBB
(eRAN7.0)
LTE-A Coverage hole
Throughput
CA Coverage hole
eRAN11.1(One way latency<=8ms)](https://image.slidesharecdn.com/huaweicloudbbsolutionintroduction-181203045142/85/Huawei-cloud-bb-solution-introduction-23-320.jpg)
Huawei cloud bb solution introduction
- 1. Security Level: www.huawei.com Huawei Cloud BB Solution Simon Wireless MSSD
- 2. Huawei Confidential 2 Content Cloud BB Motivations Cloud BB Architecture Cloud BB Cases
- 3. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3 Centralized Cloud BB CPRI Traditional Basestation What is Cloud BB?：”C” for Centralization + Coordination
- 4. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4 Commercial Centralization Cases by Huawei 2008 2009 2010 Case I: Hong Kong P Operator Capacity : each site has 20-30 BBUs, totally 200 RRUs Transmission techs: WDM (OTN) Case 2: China T Operator CDMA Network Capacity: totally 12 sites with196 BBUs, maximum site has 58 BBUs, covering about 10km² area. 2 Case 3: C Operator (SH EXPO 2010) Capacity: 29 sites with 274 BBUs, maximum site has 34 TD- S BBUs CPRI over P2P fiber Case 4: Japan S Operator WCP Capacity: Up to 100 BBUs/site CPRI over P2P fiber 2013
- 5. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 5 Cloud BB: cost overview CAPEX savings • air conditioning units • backup systems e.g. batteries • BB resources utilization improvement OPEX savings • power consumption i.e. payment to power company • regular maintenance of BTS site •BTS room rental fee CAPEX issues • CPRI transmission devices • site redesign OPEX issues • Transmission channel or fiber rent fee
- 6. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 6 CPRI issue: CPRI is the challenge in Cloud BB implementation Solution Dark Fiber (P2P Fiber) Active WDM Micro Wave Tech RRU chain or loop; BBU/RRU insert long distance white optic module BBU、RRU are connected by short distance optic directly, BB-RF over OTN Eband ( 71-76,81-86 GHz) BW (Gbps) • Bandwidth reduction : 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 Transmission Deployment Solution Interface Optimization Technology RRU BBU RRU OTN BBUOptical fiber
- 7. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 7 CPRI Compression Solution example: CPRI Configuration and CPRI Compression Cell BW Antenna CPRI BW 5M 2T2R 1.2288Gbps 5M 4T4R 1.2288Gbps 10M 2T2R 1.2288Gbps 10M 4T4R 2.4576Gbps 15M/20M 2T2R 2.4576Gbps 15M/20M 4T4R 4.9152Gbps For 20M_2T2R_4 level cascading: No compression: 2.5G*4=10G With normal compression(2:1): 5G CRPI Bandwidth For 20M_2T2R_Star_Topology 2.5G/RRUCRPI Bandwidth CPRI transmission bandwidth requirement CPRI Compression Specification Cell BW CPRI Compression Ratio Normal Compression Enhanced CPRI Compression 5M 3:2 Not supported 10M 3:2 2:1 15M/20M 2:1 3:1
- 8. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8 Deep Coordination@ Cloud BB for No Edge Experience Cloud BB Cells Combination Inference Cancellation One Cell Multi Cells Cloud BB Inter-Site Coordination Cloud BB Inter-site CA Railway, “0” Handover Challenge : Frequent handover between cells Cloud BB: cells combined, no handover Dense Urban, “0” Interference Challenge : Serious interference at cell edge Cloud BB: combine multi-cells, no interference Hot Spot, CA “Everywhere” Challenge : CA coverage uneven Cloud BB: cover the CA hole, improve edge throughput
- 9. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9 Cloud BB for Better Inter Site Coordination Inter Site CA: •CA area increased •CA user increased •No physical site limitation Inter eNodeB UL CoMP •15%~200% cell edge gain • 9%~20% cell average gain • Coverage expand user 1 user 2 user 3 Cell1 Cell2 UE1 UE2 Tx Power CSPC: Coordinated Scheduling & Power Control CA: Carrier Aggregation Fast Inter eNodeB Power Control •RB level coordination • TTI level power control •30% DL throughput gain SFN •eliminates cell edge •Reduce handover •improve user experience SFN: Single Frequency Network CoMP: Coordinated Multiple Points Reception/Transmission
- 10. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10 Performance Gain Cloud BB Scenario Cloud BB Performance Gains Inter Site UL CoMP 15%~200% cell edge gain 9%~20% cell average gain Inter Site CA 100% gain for edge user downlink throughput. SFN • Improve DL single user throughput：average 20%，edge 40% • Reduce the times of Handover and improve Handoff success rate and call drop rate Adaptive SFN 72% throughput gain (vs. normal SFN) CSPC • Cell edge throughput: 10%～200% Gain • Cell average throughput: 0%～40% Gain
- 11. Huawei Confidential 11 Content Cloud BB Motivations Cloud BB Architecture Cloud BB Cases
- 12. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 12 Access Network Solution 1：Centralized Cloud BB Fiber CPRI backhaul backhaul Solution 2：Coordination over Relaxed Backhaul(Distributed Cloud BB) HUAWEI Cloud BB Solution Overview Macro Site RRU USU
- 13. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 13 Coordination over Relaxed Backhaul Cloud BB Specification Centralized Cloud BB BBU Spec. 60 BBU@Cloud BB (12 1st Level USUs and 2 2nd Level USUs) Distances Spec. BBU&USU/ USU&USU: <100 m BBU&RRU < 10km BBU Spec. eX2 (BBU1<->BBU2) Switched Network Latency requirement < 8ms (Eran11.1) Time Synchronization CPRIUSU BBU Hotel X2
- 14. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14 Centralized Cloud BB Connection Model and Specification Spec. Item Description Physical Size 442mm(W)*420mm(D)*2U(H) Switch Capacity 1Tbps switching bandwidth 30 QSFP port, flexible switching between each port Scalability 1st Level USU: 5 BBUs Max; (6 baseband for 1 BBU) 2nd Level USU: 60 BBUs Max. (12*1st Level USUs+2*2nd Level USU) USU3910 2nd Level USU USU1 USU6 USU7 USU12 … … BBU1 BBU5 … BBU1 BBU5 … BBU1 BBU5 … BBU1 BBU5 … 1st Level USU USU1 USU2 USU BBU1 BBU5 … Less than 5 BBUs More than 5 BBUs, Need 2nd Level USU
- 15. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15 LTE-A Technology Transmissio n Medium Transmission Bandwidth Synchronization DL CA IP RAN Average:~35Mbps/cell Peak:150Mbps/cell Time Synch，<+/-1.5us Dedicated eX2 440Mbps/cell Time Synch，<+/-1.5us CSPC Dedicated eX2 10M/cell Time Synch，<+/-1.5us UL COMP IP RAN 30M/cell Time Synch，~1us Dedicated eX2 770M/cell Time Synch，~1us SFN/A-SFN Dedicated eX2 250M/cell Time Synch，<+/-1.5us Coordination Feature requirement for inter-site coordination
- 16. Huawei Confidential 16 Content Cloud BB Motivations Cloud BB Architecture Cloud BB Cases
- 17. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 17 Time Synchronization Solutions for Centralized Cloud BB USU 0 USU 1 USU 2 Level 2 Level 1 BBU 0 BBU 4 BBU 5 BBU 9 GPS clock source for time synchronizatio n GPS clock source for time synchronization Backup (recommended) USU 0 USU 1 USU 2 Level 2 Level 1 BBU 0 BBU 4 BBU 5 BBU 9 GPS clock source for time synchronization GPS clock source for time synchronization Backup (recommended)
- 18. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 18 Cloud BB, Evolved Radio 2016Q22015Q22014Q2 SFN Cloud BB Inter-site CA CoMP CSPC SRAN10.1 •UCCU: used in BBU, support 10GE •USU3910 • Centralized:60 BBU • Distributed:300 BBU SRAN11.1 •USU3910: Centralized 2- level USU backup •Centralized Cloud BB •Distributed Cloud BB •Centralized Cloud BB •Coordinated Scheduling based Power Control [Cloud BB] •Inter-eNodeB UL CoMP [Cloud BB] •Inter-site Adaptive SFN/SDMA [Cloud BB] •Inter Site CA based on Relaxed Backhaul •DL CoMP [Cloud BB] •DPS
- 19. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 19 No-Edge LTE addresses network challenges No-Edge LTE Cell edge Coverage Improvement Interference coordination CA everywhere • VoLTE • UL CoMP • CA based on CloudBB • CA based on IPRAN InterferenceCell edge CA coverage hole • CSPC • SFN/ASFN
- 20. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 20 UL CoMP for fully scenarios IntraBBU InterBBU NoCoMP Expand 17% area from inter-eNodeB CoMP. >50% cell edge thrp gain vs. intra-eNodeB CoMP 6.78% cell average thrp gain vs. intra-eNodeB CoMP 13 15 17 UL CoMP ON UL CoMP Off 11% 11% cell edge thrp gain. 8.7% cell average thrp gain . UL CoMP ON Intra eNodeB UL CoMP 10%~50% cell edge gain 7%~10% cell average gain Inter eNodeB UL CoMP CloudBB 15%~50% cell edge gain 9%~20% cell average gain 10+ Commercial （eRAN3.0） （eRAN7.0） Inter eNodeB UL CoMP Improve 0.5~2dB VoLTE Coverage 2014.02 2014.07 Relaxed Backhaul (IPRAN based) eX2 eX2 A B eRAN11.1 One way latency<30ms
- 21. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 21 CSPC Coordination to Mitigate Inter-Site Interference 80,000 People @Bernabeu Stadium Average Cell Edge Throughput Gain: 20%~30% Cell Average Throughput Gain: up to 10% CSPC ON -1000 4000 9000 14000 Cell1-MX31 Cell10-MX31 Cell11-MX31 Cell2-MX31 Cell3-MX31 Cell1-MX32 Cell10-MX32 Cell11-MX32 Cell2-MX32 Cell3-MX32 30% LTE DL Cell Edge Throughput (Kbps) CSPC Off Cloud RAN Cell1 Cell2 Cell- Center Cell- Edge Cell edge IPRAN Cell center Tx Power eRAN11.1(One way latency<=8ms) Cell1 Cell2 Throughput Gain : about 60% of CloudBB CSPC
- 22. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 22 SFN Eliminating Cell Edge 0 Handover, 0 Interference, 0 Capacity loss Normal cell Cell Combination Adaptive SFN/SDMA capacity edge user Metro with ASFN DL throughput gain: 30% 10.5% cell throughput increasing • Super dense urban: 150 sites/km2 • Up to 123% cell edge throughput increasing Case of Dense Urban Case of Metro & Dense Urban
- 23. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 23 •CA Activation Ratio 85% 98% relaxed backhaul one way delay<4ms GPS GB/2.6G(20MHz) HUT/1.8G (10MHz) BBU BBU IEEE 1588V2 Inter-site CA >1.8x peak rate CA everywhere bring consistent user experience Area P/S CC Band CA Activation Ratio CC THP [Mbps] Total THP [Mbps] YangCheo n-gu PCC 2.6G 98.91% 93.35 122.68 SCC 800M 29.34 Case: LGU+ Inter-site CA @CloudBB(eRAN7.0) IP Inter-Site CA @ Relaxed Backhaul (eRAN8.1&eRAN11.1) Inter-Site CA @ CloudBB (eRAN7.0) LTE-A Coverage hole Throughput CA Coverage hole eRAN11.1(One way latency<=8ms)
- 24. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 24 L Operator Cloud BB-based LTE-A Network Introduction
- 25. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 25 Complicated Network Condition in Seoul Ultra Dense Low Frequency Network, More Interference, Complicated Scenarios Seoul: 16475 people/KM2 Tokyo: 6909 people/KM2 Source: population density: Asia and Oceania, 2012, OECD Seoul is Twice Denser than Tokyo ~120 Meter Inter Site Distance 40 Site/KM2 •40% RRU in Seoul •60% Traffic in Seoul Very dense residential area Lots of tall buildings in dense urban
- 26. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 26 L Operator Choice: Cloud BB Architecture Cloud BB •150 GC Room •4000+ BBU •60000+ RRU Nationwide: •130,000+ RRU •Cloud BB ~95% area Seoul Area •60000+ RRU •Hot Zone: 230 cells@km2 •Average: 100Cells@km2
- 27. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 27 L Operator Cloud BB Basic Information • Average 30 BBUs in 1 GC Room; • More Reduction of Capex & Opex • Shorter Time to Market WDM BBU Cloud EPC ~17km HUB Office Core Office RRU CPRI over OTN Backhaul RRU Up to 20km RRUBBU Distance RRU UL CoMP Big Cloud BB • CA Everywhere: ~90% area with CA • CoMP Everywhere: 15~200% THP gain in cell edge No-Edge in Cloud BB
- 28. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 28 Huawei Cloud BB case at S Operator in Japan Reusing Existing PHS Sites Supper Dense BTS 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 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
- 29. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 29 Networking configuration and test result of CSPC 5 1 2 3 4 6 7 8 9 10 11 12 BBU1 Cell# 1234512 Cell# 67891011 Cloud BB Fiber BBU0 USU V Operator :We have a fantastic scenario to show the potential of Cloud RAN ! First result are promising ,let’s complete the trial to fully understand C-RAN potential! DL Cell Throughput (Kbps) CSPC ON CSPC OFF -1000 4000 9000 14000 Cell1-MX31 Cell10-MX31 Cell11-MX31 Cell2-MX31 Cell3-MX31 Cell1-MX32 30% Improved 30%
- 30. HUAWEI TECHNOLOGIES CO., LTD. www.huawei.com E Operator and Huawei Joint Distributed Cloud BB Trial
- 31. HUAWEI TECHNOLOGIES CO., LTD. Huawei proprietary. No spread without permission. Page 31 E Opeator and Huawei Joint Distributed Cloud BB Trial Test Distributed Cloud BB Value. Easy for legacy site coordination Larger area coverage Less fiber requirement Feature support. Inter-site CA/SFN/UL_CoMP eX2 Inter Site CA Switched Off Inter Site CA Switched On DL Throughput is increased by ~40% SFN Switched Off SFN Switched On Average: ~12Mbps Average: ~27Mbps 2x DL Throughput by SFN UL CoMP Switched Off UL CoMP Switched On Average: ~14Mbps Average: ~30Mbps 2x UL Throughput UL CoMP
- 32. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 32 Hong Kong：First IPRAN CA relaxed backhaul <4ms F A N UPEU BBP UPEU BBP UMPT F A N UPEU BBP UPEU BBP UMPT LAN switch Metro NE 40E MME 87 73 27.84 61 50 9.55 139 119 36.50 CA Current Network Test result(Mbps) IPRAN CA= 0.96 (A+B) MME Hong Kong 2014/12: 100 site deploying 2015: All network 2000+Site will deploy LAN switch Metro GB/2.6G(20MHz) HUT/1.8G (10MHz) 2.6G 1.8G 2.6G + 1.8G
- 33. Copyright©2014 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.