5G Standards and Outlook for 5G Unlicensed

Transcription

1 5G Standards and Outlook for 5G Unlicensed Antti Toskala Bell Labs Fellow Nokia Bell Labs June 1

2 3GPP RAN Release 15 Schedule both 5G SA and NSA specs now available! Building the baseline for next phase of 5G, including unlicensed RAN #74 RAN #75 RAN #78 RAN #78 (Rel-15 completion) Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 5G Study 5G NR Work Item Further Evolution NSA Non Stand Alone = EPC core ( Options 3 ) & LTE Anchor SA = Stand Alone 5G NR NSA completion Stage 3 completion for Non-Standalone 5G-NR NSA Option 3 family ASN.1 5G NR SA completion Stage 3 completion for Standalone 5G-NR (and NSA options with 5G Core) Rel-15 ASN.1 for SA & NSA Late drop 5G NR architectures 4 and 7 NEW 2

3 5G RAN architecture Functional split 5G Core Network June Release 15 will contain higher layer split Lower layer split was studied as well. Study is currently on hold. NG CU-CP RRC PDCP-C June E1 June NG CU-UP SDAP PDCP-U June December 2017 version supports only connection to LTE based core (EPC) F1-C F1-U Interface to 5G Core (5GC) in June specifications DU RLC Also E1 interface part of June specifications MAC Physical Layer 3

4 5G RAN Architecture Options & Schedule - Option 3 Supported First Non-standalone Option 3X Dec 2017 Standalone Option 2 June Non-standalone Option 7X Dec Non-standalone Option 4 Dec EPC 5G-CN EPC 5G-CN EPC 5G-CN EPC 5G-CN LTE 5G LTE 5G LTE 5G LTE 5G Option 5 = LTE connected To 5G core (Known also as elte) = Control plane only = User + control plane = User plane only In 2Q/ focus on options 2 and 3, options 4 and 7 to be introduced as Release 15 late drop 12/18 (ASN.1 03/19) 4

5 5G Release 15 Overall Radio Protocol Architecture New Service Data Adaptation Protocol supports per packet QoS Processing friendly to support extremely high bit rates Supports very low latency transmissions and efficient power saving techniques Full 5G radio protocol specifications in June for standalone 5G operation In December 2017 version only parts necessary for the early drop SDAP PDCP RLC MAC Segm. ARQ QoS flow handling... Multiplexing UE1 HARQ Segm. ARQ QoS Flows Radio Bearers ROHC ROHC ROHC ROHC Security Security Security Security RLC Channels Logical Channels Scheduling / Priority Handling Transport Channels Segm. ARQ QoS flow handling... Multiplexing UEn HARQ Segm. ARQ June 5

6 What is 5G in Release 15? Radio Design (NR) A new set of technologies for a generation leap in capabilities June June 6 * More after Release 16

7 What Are the Challenges with the First Version of 5G? Physical Layer (L1) Lot of parameters & features Determining mandatory L1 feature set Protocols Parameterizing large number of L1 parameters Dealing with new procedures (beam management etc.) Spectrum Finalize 5G frequency bands Finalize band combinations (many!) Any of the area not done right by March will require corrections in later version of specifications UE capability (what is mandatory and what not) also being worked still, some until 09/ In lot of time is needed for full Release 15 finalization in 3GPP Especially Radio Resource Control (RRC) specifications require lot of attention still in 7

8 8 Release 16 Timeline Unchanged Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Rel-15 NSA (option-3) freeze Rel-15 NSA (option-3) ASN.1 Rel-15 SA (option-2) freeze Rel-15 SA (option-2) ASN.1 Rel-15 late drop freeze Rel-15 late drop ASN.1 Rel-16 SI Rel-16 SI/WI phase Rel-16 freeze Rel-16 ASN.1 8

9 Release 16 Nokia Key Themes 5G Radio Efficiency enhancements Enhancements for MIMO, dual connectivity & positioning Fast Cell Access, Dynamic TDD, RACH Enhancements 5G Rel-16 Industry 4.0, smart city, Private networks Unlicensed 5G NR based IoT UE categories Industrial IoT, URLLC enhancements Deployment & operability Integrated Access & Backhaul Big Data Collection & utilization 9 On-going SID/WID New Release 16 topic

10 Release 16 Timeline 5G/ Physical Layer Items Q3 Q Q Q Q Q4 NR MIMO WI NR V2X SI NR V2X WI Existing items NR-U SI NOMA SI NR-U WI NOMA continuation? RIM SI RIM+CLI WI NR UE power consumption SI NR Positioning SI eurllc L1 SI NR UE power consumption WI NR Positioning WI eurllc L1 WI NR non-terrestrial SI 10

11 Release 16 Timeline 5G Protocol/Architecture Items Q3 Q Q Q Q Q4 Existing item IAB SI NR Industrial IoT SI IAB WI NR Industrial IoT WI NR Mobility enhancement SI/WI RAN2 NR DC & CA enh. SI UE capabilities SI NR V2X SI NR DC & CA enh. WI UE capabilities WI NR V2X WI NR-NR DC sync for late drop RAN3 NR SON/MDT SI NR SON/MDT WI 11

12 5G Unlicensed Scenario Under Work in 3GPP - Both standalone and LAA cases covered Ref: RP An NR-based LAA cell(s) connects with an LTE or NR anchor cell operating in licensed spectrum The study assumes the techniques for linking between Pcell (LTE or NR licensed CC) and Scell (NR unlicensed CCs) according to the NR WI An NR-based cell operating standalone in unlicensed spectrum, connected to a 5G- CN network, e.g., for private network deployments; Study how to ensure from a RAN level that connection and security management can be integrated with the E-UTRAN, NG RAN and 5G CN architecture, including service continuity requirements for users moving between cells of licensed and unlicensed frequency bands, liaising with SA2 as required 12

13 5G Unlicensed Physical Layer 3GPP - Scope of the on-going study in 3GPP, higher frequency bands now removed Physical channels inheriting the choices of duplex mode, waveform, carrier bandwidth, subcarrier spacing, frame structure, and physical layer design made as part of the NR study and avoiding unnecessary divergence with decisions made in the NR WI Consider unlicensed bands below 7GHz Consider similar forward compatibility principles made in the NR WI Initial access, channel access. Scheduling/HARQ, and mobility including connected/inactive/idle mode operation and radio-link monitoring/failure Coexistence methods within NR-based and between NR-based operation in unlicensed and LTE-based LAA and with other incumbent RATs in accordance with regulatory requirements in e.g., 5GHz, 6GHz bands 13

14 Next Steps for 5G Unlicensed in 3GPP Normative phase to start from beginning of 2019 until end of 2019 Study scheduled to be finalized by 12/ This work foreseen to focus only on below 7 Ghz Regulatory framework for higher bands also being checked in 3GPP The current numerology/waveform not intended above 52.6 GHz Separate RAN level study on above 52.6 GHz agreed to be started Normative work foreseen for high bands (like 60 GHz) foreseen in Release 17 14

15 When Can You Buy a 5G Handset? 5G Schedule based on LTE History LTE 3GPP Release 8 March Telia LTE launch December LTE launches 2H/2010 5G 3GPP Release 15 March G launch by end Several 5G launches 2019 First 3GPP LTE was launched by Telia in December That was 8 months after 3GPP completed Release 8. Total 12 LTE launches during 2H/2010. Note the planned std phase in 3GPP for 5G is very short, only 9 months after study, which gives less development time compared to LTE specification time Nokia is working hard to ensure stable specifications from 3GPP side to make this happen 15

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