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5G Technology Development in ITRI
Pang-An Ting Division for Emerging Wireless Application Technology ICL/ITRI 2017/01/22
Copyright 2017 ITRI 工業技術研究院
Copyright 2017 ITRI 工業技術研究院 3
Our Views on 5G R&D
Copyright 2017 ITRI 工業技術研究院 4
Small cell
S-GW
P-GW
HSS (EPC)
MME
NFV-based iMEC GW
Internet
5G eMBB UDN system 5G mMTC system
Small cell GW
Local services
xHaul Manager
Our Views on 5G R&D Program
3 Key 5G systems
(1) eMBB UDN
(2) mMTC
(3) mmWAVE
Key sub-systems、elements、modules
– Small cell / SON/ UDN
– NB-IoT and its evolutions
– Intelligent Mobile Edge Computing (iMEC)
– Network Function Virtualization Infrastructure (NFVI)
– RF components / modules (sub-6GHz / above 6GHz)
5G mmWAVE system
Copyright 2017 ITRI 工業技術研究院
EU-TW (Phase-II)
Enterprise
UDN prototype
5G R&D and Prototyping
2013 2015 2017 2020 2025
Rel 12 Rel 13 Rel 14 (5G SI)
Rel 16 (5G Enhanced)
Rel 15 (5G SI/WI)
2016 2014 2018 2019
Rel 17 (5G Enhanced)
5G Solution
Commercialization Pre-5G R&D R&D
Testing
TAIWAN
Timeline
…
1st Stage 2
nd Stage 3rd Stage
5G 發展時程與規劃
3GPP SEP B4G SEP Pre-5G / 5G SEP
Collaboration
EU-TW (Phase-I)
ICT-14 & METIS-II
Local SDO TAICS (Taiwan Information and Communication Standard)
Future Forum
E2E
PoC
Trial
system
A+ projects Commercialization
Phase-II : 5G Key tech + standardization (2017 ~ 2020)
Phase-I : Pre-5G Key tech (2014 ~ 2017)
Copyright 2017 ITRI 工業技術研究院 6
ITRI Small Cell Technology Development
ITRI Develop Pre-Commercial Small Cell − ITRI L1 soft modem on DSP
− ITRI develop L2, L3 and system software on ARM
– IOT with
• Commercial EPCs
– NSN (CHT Lab)
– Cisco (ITRI Field Trial)
• Commercial Handsets
– iPhone 5 Handset (Qualcomm LTE Chipset)
– Foxconn inFocus Handset (Qualcomm LTE Chipset)
– ALU Handset (MTK LTE Chipset)
– HTC Handset (Qualcomm LTE Chipset)
• Commercial Dongles
– BandRich LTE Dongle (Qualcomm LTE Chipset)
Specification − Support 16-UE per TTI
− Support 5/10/15/20 MHz
− Support 2*20MHz CA, IRC, ICIC, eICIC
− Maximum Throughput : 212M/20M
− Output power : 24 dBm
− 4T4R, SU-MIMO, MU-MIMO
− SPS/DRX/HARQ
− Support LWA, LAA
− Operation Bands: B40, B42, B46
LTE-A Small Cell (1/4)
Small Cell Hardware
ITRI Small Cell Housing
Copyright 2017 ITRI 工業技術研究院 8
LTE-A Small Cell (2/4)
Taiwan First 2*20MHz Carrier Aggregation Small Cell System Upgrade TD-LTE Throughput from 100 Mbps to 200 Mbps
2*20MHz CA and 64
Concurrent Active UEs
High Efficient Cross Carrier
Scheduling
2*20MHz carrier component
concurrently support primary cell
and secondary cell
64 active UEs can simultaneously
using carrier aggregation function
to upgrade the throughput of each
connection
Load balancing between two
carrier component
Max. System Throughput (TDD
Mode): 214 Mbps
2個20MHz Carrier Aggregation , Throughput 200 Mbps ITRI Small Cell與 HTC手機互通測試畫面
64個UEs連線服務ITRI Small Cell與 TM500手機模擬器互通測試畫面
Copyright 2017 ITRI 工業技術研究院 9
ITRI LWA Small Cell Technology
ITRI/MTK Join Developing LTE/Wi-Fi
Aggregation(LWA) Technology
Joint development of ITRI and MTK
ITRI --- Small Cell
MTK --- Smart Phone
In parallel with 3GPP R13 LWA
standards development
Among Global Leading Group
Dynamic data rate adaptation for the
variation of channel quality
Performance
Up to 500 Mbps
LTE : Wi-Fi = 100 : 400 Mbps
Upgrade the throughput of LTE system from original 100 Mbps to 500 Mbps
eNB
UE
PDCP
Wi-Fi AP
RLC
MAC
PHY
MAC
PHY
Wi-Fi
Commercial Wi-Fi AP •802.11ac @ 5 GHz band •No SW/HW change
LWA Small Cell •LTE: TDD Band 40
LTE
PDCP
RLC
MAC
PHY New Control Messages - UE capability report with Wi-Fi MAC address
- LWA activation/deactivation - WLAN status report
- WLAN measurement report - PDCP packet count report
PDCP PDU encapsulated directly in Ethernet frame
(L2 bridging)
Cisco Gigabit Switch
LTE EPC Emulator & Downlink Traffic Generator
LWA UE (MT6795)
ITRI LWA
Small Cell
MTK LWA
Smart Phone
China Telecom Press Release 9/24 : Cooperation with MediaTek and ITRI to show 3GPP R13 LWA
Pioneer Technology technology
LTE-A Small Cell (3/4)
Copyright 2017 ITRI 工業技術研究院
LAA Prototyping
10
LTE-A Small Cell (4/4) 與TM500對測,在Clean Channel狀
況下,DL Total Throughput 可達 222 Mbps
Copyright 2017 ITRI 工業技術研究院 11
Dynamic smart antenna beam selection for capacity and
coverage optimization
Meeting Room
Corridor
Office
Hallway
Corridor Corridor
Meeting Room Office
Hallway
ITRI’s SON Server
Small Cell with Smart Antenna 104m
26m
Small Cell+SON Field Trial (1/3) Smart Antenna CCO測試場域建置:
• 51館5F建置6台具備Smart Antenna的UDCell Small Cell
Smart Antenna
Capacity and Coverage Optimization
Copyright 2017 ITRI 工業技術研究院 12
Small Cell+SON Field Trial (2/3)
Smart Antenna CCO測試場域測試結果:
Before After
Average SINR (dB) -5.48109 12.701
Coverage 0.5548 1
Per cell average capacity (Mbps)
Theory value
45.7634 153.484
KPI:40% 平均SINR + 30%覆蓋率 + 30%平均系統容量
使用前 使用後
(手動設定:六台UDcell,發射功率-30dBm + 五個方向全開)
Copyright 2017 ITRI 工業技術研究院 13
Small Cell+SON Field Trial (3/3) Smart Antenna CCO測試場域測試結果:
Smart Antenna
Omni Smart Antenna
Average SINR (dB) 8.66767 12.701
Coverage 1 1
Per cell average capacity (Mbps)
Theory value
130.388 153.484
Omni
KPI:40% 平均SINR + 30%覆蓋率 + 30%平均系統容量
使用全向性天線 vs. 使用Smart Antenna佈建比較
Copyright 2017 ITRI 工業技術研究院 14
Smart Antenna Based CCO 利用Smart Antenna的961種不同場型補強通訊涵蓋範圍內訊號不足之處, 搭配基地台發射功率
的調整可優化網路訊號品質與覆蓋率提升整體系統容量
把基因演算法應用在CCO機制上
− 基因演算法收斂速度快, 可在短間內找到接近最佳化的參數設定
− 因為有基因交配與突變之能力, 定期執行CCO可使整個網路具有時間越久效果越好之特性。
CCO啟用前: -5.4dB
1 2 3 4 BS
參數組合基因a
參數組合基因b
(Tx Power, Antenna Beam)
Omni Antenna CCO啟用後: 8.6dB
Smart Antenna CCO啟用後: 12.7dB
Copyright 2017 ITRI 工業技術研究院
5G NR Splitting Between Central and Distributed Units
PDCPLow-
RLC
High-
MAC
Low-
MAC
High-
PHYLow-PHY
PDCPLow-
RLC
High-
MAC
Low-
MAC
High-
PHYLow-PHY
Option 5Option 4 Option 6 Option 7Option 2Option 1
RRC
RRC
RF
RF
Option 8
Data
Data
High-
RLC
High-
RLC
Option 3
3GPP TR 38.801-040
(2016.08)
3GPP is expected to study different functional splits between central and distributed units. (CU and DU)
Based on LTE protocols stacks. Pros & cons and benefit are capture in TR 38.801. By November RAN2 should update RAN3 on NR protocols stacks (possible joint
session) RP-161346 (RAN plenary, 2016.09)
15
Copyright 2017 ITRI 工業技術研究院 16
Network MIMO Prototype System • 開發Network MIMO關鍵技術
– 支援 Virtualized Small Cell架構
– 16×8 Joint Transmission / Precoding技術
– 克服多基站時間、頻率、相位同步與通道時變等相關技術問題
◊ 基站間 CFO < 1ppb; 多用戶預編碼; 用戶間干擾 < -25dB
– System performance驗證目標設定
◊ 8 eNBs、8 UEs下,頻譜效率增加近8倍
• 已規劃於2017 MWC 進行Pre-5G Network MIMO系統展示
– LTE-A Virtualized Small Cell 架構
– Pre-5G Network MIMO system
◊ 8 ITRI Small Cells、8 commercial LTE UEs
◊ Joint Transmission / Precoding技術
◊ 8倍System Throughput Improvement
Network MIMO system
Copyright 2017 ITRI 工業技術研究院 17
5G NR Parameters
Item Value
Channel Bandwidth 80MHz
Resource Bandwidth 72MHz
Subframe duration 1ms
Frame duration 10ms
CP length(overhead) Normal :7.03% (144/2048) Extended: FFS/25%(512/2048)
Sampling rate 122.88MHz(60k*2048)
Subcarrier spacing(kHz) 15 30 60 120 240 480
oversampling 32 16 8 4 2 1
FFT size 8192 4096 2048 1024 512 256
Symbol duration w/o
CP(samples) 65536 32768 16384 8192 4096 2048
CP duration (samples)
<sym0~6, sym0 in
0.5ms>
4608 2304 1152 576 288 144
5120 2816 1664 1088 800 656
# of used subcarriers 4800 2400 1200 600 300 144
# of PRBs 400 200 100 50 25 12
Copyright 2017 ITRI 工業技術研究院 18
Data and Control Channel Coding of 5G NR
Agreement in RAN1#87: • UL eMBB data channels:
– Working Assumption to adopt flexible LDPC as the single channel coding scheme for small block sizes (to be confirmed unless significant issues are identified by the RAN1 Jan adhoc in relation to performance, implementation complexity and flexibility)
(Note that it is already agreed to adopt LDPC for large block sizes)
• DL eMBB data channels:
– Adopt flexible LDPC as the single channel coding scheme for all block sizes
• UL control information for eMBB
– Adopt Polar Coding (except FFS for very small block lengths where repetition/block coding may be preferred)
• DL control information for eMBB
– Working Assumption to adopt Polar Coding (except FFS for very small block lengths where repetition/block coding may be preferred)
◊ To be confirmed unless significant issues are identified by the RAN1 Jan adhoc in relation to performance, latency, power consumption and implementation complexity
18
Copyright 2017 ITRI 工業技術研究院 19
Possible Realization of Radio Head
DSP
RF
FPGA
Memory
Peripheral
Accelerators
DSP based RFN
x86
RF
FPGA
DSP
Memory
Peripheral
Accelerators
x86 based RFN
• DSP
• hardware accelerator
• X86 (Atom??)
• Software accelerator
(DSP) or Hardware
accelerator (FPGA)
Copyright 2017 ITRI 工業技術研究院 20
ITRI mmWave Access Technology Development
Copyright 2017 ITRI 工業技術研究院 21
Targeted mmWave Radio Access Technology
– mmWave + Channel measurement
◊ Get wider available bandwidth to achieve 1~10 Gbps peak data rate
◊ Characterize the mmWave channel about RMS delay spread, path loss, path loss exponent, shadowing factor, AoA, AoD, …
– Phased array antenna + Beam-forming
◊ Solving mmWave high path loss and propagation loss issues by beam-forming
– Beam-forming + beam tracking
◊ Solving mobility issue under beam-forming
– Multi-site beam mobility
◊ Solving blockage issue under beam-forming in hot spot
mmWave
Channel Measurement Phased array antenna Beam forming/tracking Blockage Solution
Copyright 2017 ITRI 工業技術研究院 22
mmWave Channel Measurement Setup
Copyright 2017 ITRI 工業技術研究院 23
Ray-tracing Modeling 38 GHz
AOA / AOD
TX (Height : 2.3m)
RX (Height : 1 m /1.6m)
Copyright 2017 ITRI 工業技術研究院 24
mmWave Hardware Designed by ITRI
To RF Front-end
TI DSP FPGA
IF
Copyright 2017 ITRI 工業技術研究院 25
Beam-forming Hardware Architecture
IF:3GHz
RF:38GHz
Super heterodyne
• Hybrid beam-forming architecture
– Beam steering @ phase shifter of T/R module
Copyright 2017 ITRI 工業技術研究院 26
Beam Acquisition and Tracking
• Scan beam :
– BS transmits “scan beam” periodically
• Schedule beam:
– BS transmits “schedule beam” by scheduling
SSF
PUCCH PUCCH
PUCCHPUCCH
PUSCH PDSCH
PUCCH PUCCH
PUCCHPUCCH
PUSCH PDSCH PDSCH PDSCH PDSCH
PUCCH PUCCH
PUCCHPUCCH
PUSCH
Scan beam Schedule beam
Network
entry
Beam 1 2 .. 8 Beam 2
Frame i Frame i+1
Beam 3
Copyright 2017 ITRI 工業技術研究院 27
DEMO GUI
Copyright 2017 ITRI 工業技術研究院 28
Field Test (Badminton Court)
Copyright 2017 ITRI 工業技術研究院 29