When technology meets spectrum: Bring 5G vision into Reality 5G India 2018, 2 nd international conference (May 17-18, 2018) WU Yong www.huawei.com
5G Vision: Enabling a full connected world Enhance Mobile Broadband embb embb Peak Data Rate User Experienced Data Rate mmtc Massive Machine Type Communications IMT-2020 usage scenario Diverse services URLLC Ultra-Reliable and Low Latency Communications IMT-2020 Vision Rec. ITU-R M.2083 Area Traffic Capacity Network Energy Efficiency mmtc Connection Density Latency IMT-2020 Key capabilities Diverse requirements Spectrum Efficiency URLLC Mobility How to realize the broad vision through 5G technology and spectrum? Page 2
3GPP 5G technology: Unified framework for diverse requirements NR frame structure Numerology, and waveform NR Channel coding, and modulation NR flexible duplex and flexible spectrum use NR Massive MIMO Flexible frame structure D D D S U Multiple numerologies and OFDM based waveform (f-/w-ofdm) Polar For control channel; Polar is robust for small data and has good coverage. p/2 BPSK QPSK LDPC For data channel; LDPC can fast decode large amount of data in a cost efficient manner. 256QAM Flexible duplex for both paired and unpaired spectrum Flexible spectrum use including TDD + SUL D D D S U One cell = + Supplementary UL (DL part not needed) Unified MIMO framework for control and data Signaling & feedback enhancement with more accurate CSI Beamforming enhancement: Hybrid baseband & analog beamforming B1 B2 B3 B9 B4 B8 B5 B6 B7 DATA/CONTROL/ PILOT/HARQ Full spectrum support from 0.5 GHz to mmwave Page 3
5G spectrum: C-band/G30/G40 Potentially Global Harmonized Sub6GHz Europe USA China Japan Korea n77 n79 n78 3.3 3.4 3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 5.0 GHz n258 (24.25-27.5GHz) n257 (26.5 29.5 GHz) n260 (37 40 GHz) mmwave Europe USA China Japan Korea G30 20 30 40 45 1.6 3.25 GHz 3 GHz GHz 0.85GHz 3 GHz 3.25 GHz 6.5 GHz 2 GHz 3 GHz Confirmed Likely TBD G40 GHz WRC-19 candidate, global primary Mobile Service WRC-19 candidate, band not global primary Mobile Service Not in scope band of WRC-19 AI1.13 Page 4
5G spectrum map for 5G vision Legacy IMT band Sub-3 GHz C-band 3.3 GHz ~ 4.99 GHz mmwave >24 GHz mmtc URLLC embb Rural, Urban, Dense Urban embb Hotspot (indoor, outdoor) Paired / Unpaired Unpaired (TDD) Unpaired (TDD) 5G new band: TDD dominant Page 5
Early 5G deployment: Macro site with C-band is a trend C-band: good trade off of bandwidth and coverage Macro site deployment: fast re-use available sites Fast and cost-efficient 5G deployment is made possible. How to make it work? How to guarantee coverage? Page 6
Inter-operator Synchronization Desired for C-band macro site Asynchronous 5G NR TDD Requires >25MHz Guard-band among operators Synchronous Operation Global eco-system Band specific receiver filter design(cheap) Common frame structure among operators Asynchronous Operation Operator specific receiver filter design(very expensive) Inter-operator Guard Band >=25MHz Operator 1 Sub-band1 100Mhz Operator 2 Sub-band2 100Mhz Operator 3 Sub-band3 100Mhz Operator 1 Sub-band1 ~85MHz Operator 2 Sub-band2 ~ 70MHz Operator 3 Sub-band3 ~85MHz 3400 Guard Band Guard Band >=25MHz >=25MHz 3700 For avoiding Interference, Unsynchronized Scenario ECC Spurious emission requirement <-43dBm/5MHz TRP Page 7
Unified frame structure for macro site The unified frame structure needs to be selected for the synchronized macro site deployment. An average DL:UL utilization ratio of around 4:1 for typical scenario is observed. Typical operator s average DL:UL radio resource ratio 70.0% 60.0% 50.0% 40.0% Operator A Operator B Operator C Operator D 59.2% 51.6% 45.3% 39.7% 30.0% 20.0% 10.0% 10.4% 12.1% 8.6% 11.4% D D D S U 0.0% DL Traffic Load by PRB Usage UL Traffic Load by PRB Usage Page 8
DL/UL de-coupling (TDD+SUL band operation) A new paradigm to guarantee 5G coverage C-band (TDD 4:1) + Supplementary UL (SUL) band Extends C-band Coverage TDD + SUL ( DL/UL de-coupling) Adopted by 3GPP R15 UL@1.8GHz/3.5GHz 1.8GHz DL@3.5GHz *Proposed frequency ranges 1920-1980MHz (UL)/3.3-3.8 GHz*(DL&UL) 1710-1785MHz (UL)/3.3-3.8 GHz*(DL&UL) 832-862MHz (UL)/3.3-3.8 GHz*(DL&UL) 880-915MHz (UL)/3.3-3.8 GHz*(DL&UL) 3.5GHz 64T64R 3.5GHz UL Coverage Extended UL Coverage 1.8GHz UL Coverage 703-748MHz (UL)/3.3-3.8 GHz* (DL&UL) 1800MHz adopted in R15 Phase 1.1 700/800/900/2100MHz will be adopted in R15 Phase 1.2 Page 9
TDD 4:1 + SUL band operation: A unified solution for coverage + large data rate + low latency TDD 4:1+SUL 3.5GHz TDD ACK/NACK Type Cell-edge RTT latency DL proc. Time 10 sym GP overhead GP* 4 sym TDD (4:1) 3.31ms 2.86% TDD (1:1) 2.67ms 14.3% 1.8GHz SUL TDD (4:1) +SUL 1.5ms 2.86% Page 10
Summary: When 5G technology fits 5G spectrum It opens the way to bring 5G vision into Reality NR unified framework Frame structure, Numerology, Waveform Coding and modulation Duplex and spectrum use Massive MIMO embb TDD band (4:1) mmtc URLLC Legacy IMT band Sub-3 GHz C-band 3.3 GHz ~ 4.99 GHz mmwave >24 GHz Page 11
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