5G Views of NTT DOCOMO

Transcription

1 NTT DOCOMO, INC., Copyright 2015, All rights reserved. 1 5G Views of NTT DOCOMO Takehiro Nakamura NTT DOCOMO, Inc.

2 5G Work Plan for ITU-R Submission NTT DOCOMO, INC., Copyright 2015, All rights reserved. 2 5G work plan in 3GPP needs to be defined and aligned with ITU-R time line Stable 3GPP specifications should be ready for ITU-R submission by end of WRC WRC-15? #18 #19 #20 #21 #22 #23 #24 #25 #26 #27 #28 #29 #30 #31 #32 #33 #34 #35 #36 Report Technology trends Report IMT feasibility above 6 GHz Technical Performance Requirements Evaluation criteria & method Proposals IMT-2020 Evaluation Consensus building Recommendation Vision of IMT beyond 2020 Modifications of Resolutions 56/57 Requirements, Evaluation Criteria, & Submission Templates Circular Letters & Addendum Workshop Outcome & Decision IMT-2020 Specifications Background & Process

3 5G Work Plan for Commercial Requirements Commercial requirements also need to be considered by 5G work plan of 3GPP Japan is targeting 5G commercial launch in 2020 (see below figure provided by Japanese MIC) 3GPP is requested to develop initial 5G specifications so as to enable the initial deployment of 5G system in 2020 Promoting Body R&Ds International Affairs In ITU. World Radio Conf. (WRC-12) ARIB 2020 and Beyond Adhoc Established in Sep. 30th Activities by The Fifth Generation Mobile Communications Promotion Forum R&Ds on 5G through Industry-Academic- Government Cooperation 5G Standardization Activities Rugby World Cup Giving strategic guidance on R&Ds, standardization, international cooperation & public relations Investigation into potential spectrum for 5G through R&D activities Amend regulations, allocating Spectrum, deploy base stations, etc Examine 5G Requirements and Service image ITU-R Report IMT.FUTURE TECHNOLOGY TREND ITU 5G Workshop ITU-R Rec. IMT.VISION World Radio Conf. (WRC-15) Secure additional spectrum to 4G Discussion of spectrum for 5G Propose & Evaluate Interface World Radio Conf. (WRC-19) Possibilities of identification of 5G bands Study on spectrum for 5G as a preparation of WRC-18 with attention to international harmonization Tokyo Olympic / Paralympic Games World s first 5G implementation Translated from Final Report from the Radio Policy Vision Council", Ministry of Internal Affairs and Communications, Japan, December NTT DOCOMO, INC., Copyright 2015, All rights reserved. 3

4 Phased Approach for 5G Launch NTT DOCOMO, INC., Copyright 2015, All rights reserved. 4 Considering both aspects of ITU-R submission and commercial requirements in Japan, we propose following phased approach for 5G 5G: Work plan for 5G deployment in G key technologies introduced to existing spectrum bands and new spectrum bands lower than 6 GHz potentially with unlicensed bands Among all ITU-R requirements, MBB (mobile broadband) related requirements (e.g., peak data rate, capacity) should be prioritized Specifications should be ready no later than end of G+: Work plan for ITU-R submission Full optimization of 5G key technologies to achieve very high performance targets to satisfy all ITU-R requirements Introduction of higher spectrum bands above 6 GHz Stable specifications at the end of 2019 should be submitted to ITU-R

5 NTT DOCOMO, INC., Copyright 2015, All rights reserved. 5 Overall 5G Time Plan Commercial system development for 5G in G launch 5G+ launch WRC15 Workshop WRC19 Requirements Proposals Specifications Rel. 13 Rel. 14 Rel. 15 Channel Model SI Requirement SI Rel. 16 Technology SI WIs WIs WIs

6 Form of 5G Phased Approach 5G phased approach: 5G (in 2020) : elte + New RAT with MC waveform in below 6GHz (potentially with unlicensed bands) 5G+ : Extended new RAT with MC/SC waveforms in above 6GHz Existing frequency bands UHF Ex. 800MHz, 2GHz elte RAT Low SHF 3-6GHz WRC-15 new band (& unlicensed bands) Tight interworking New bands over wide range of frequencies 6GHz 5G (in 2020) 5G Radio Access 5G New RAT(s) (MC waveform) (SC waveform) High SHF 6-30GHz 5G+ (in 202x) EHF > 30GHz Frequency NTT DOCOMO, INC., Copyright 2015, All rights reserved. 6

7 5G Continuous Evolutions 5G = elte RAT + New RAT Continuous evolution of 5G 5G+ 4G 5G 5G+ New RAT Forward compatible Backward compatible New RAT LTE Continuous evolution Tight interworking elte Continuous evolution elte Tight interworking (Launch in 2020) (Launch in 202x) NTT DOCOMO, INC., Copyright 2015, All rights reserved. 7

8 NTT DOCOMO, INC., Copyright 2015, All rights reserved. 8 Technologies Ready for 2020 Fundamental 5G features should be specified in Rel-14 even for short cycle option taking into account risk of delay in Rel-15 NOMA should be completed by Rel-14 as LTE enhancements in 5G, also LTE New RAT Waveform, numerology, and frame design Wider bandwidth and ultra low latency Wider bandwidth with wider subcarrier spacing Freq. Lean carrier design Less inter-cell interference, energy saving, and good future compatibility 5G 5G 5G 5G 5G 5G (Release 14) 5G future (Release 15,16,17,18,19,20 ) 5G 5G-A 5G 5G-B 5G-A Massive MIMO/beamforming with true seamless mobility Improved spectrum Cell range extension efficiency Support of unlicensed bands and flexible duplex with LTE-assisted access (LTE-AA) Licensed band (LTE) Unlicensed band (new RAT) Freq.