© 2018 Nokia1

5G Standards and Outlook

for 5G Unlicensed

Antti Toskala

Bell Labs Fellow

Nokia Bell Labs

June 2018

© 2018 Nokia2

3GPP RAN Release 15 Schedule – both 5G SA and NSA specs now available!

2016 2017

Q4 Q1 Q2 Q3 Q4

2018

Q1 Q2 Q3 Q4

5G Study 5G NR Work Item Further Evolution

5G NR NSAcompletion

5G NR SAcompletion

Stage 3 completion for Non-Standalone 5G-NR

NSA Option 3 family ASN.1

Rel-15 ASN.1 for SA & NSA

Stage 3 completion for Standalone 5G-NR (and

NSA options with 5G Core)

NSA – Non Stand Alone = EPC core (“Options 3”) & LTE AnchorSA = Stand Alone

RAN#74

RAN#75

RAN#78

RAN #78(Rel-15 completion)

“Late drop”5G NR

architectures 4 and 7

NEW

Building the baseline for next phase of 5G, including unlicensed

© 2018 Nokia3

Functional split

5G RAN architecture5G Core Network

E1

June 2018

NG NGJune 2018

June 2018

CU-CP

RRC

PDCP-C

CU-UP

SDAP

PDCP-UJune 2018

F1-CF1-U

DU

RLC

MAC

Physical Layer

• Release 15 will contain higher layer split

• Lower layer split was studied as well. Study is currently on hold.

• December 2017 version supports only connection to LTE based core (EPC)

• Interface to 5G Core (5GC) in June 2018 specifications

• Also E1 interface part of June 2018 specifications

© 2018 Nokia4

5G RAN Architecture Options & Schedule - Option 3 Supported First

EPC 5G-CN

LTE 5G

EPC 5G-CN

LTE 5G

Standalone

Option 2

Non-standalone

Option 3X

EPC 5G-CN

LTE 5G

Non-standalone

Option 7X

EPC 5G-CN

LTE 5G

Non-standalone

Option 4

= User + control plane

= User plane only

= Control plane onlyOption 5 = LTE connectedTo 5G core (Known also as eLTE)

In 2Q/2018 focus on options 2 and 3, options 4 and 7 to be introduced as Release 15 late drop 12/18 (ASN.1 03/19)

June 2018

Dec 2017

Dec 2018

Dec 2018

© 2018 Nokia5

Overall Radio Protocol Architecture

5G Release 15

• 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 2018 for standalone 5G operation

In December 2017 version only parts necessary for the “early drop”

Segm.

ARQ

Multiplexing UE1

Segm.

ARQ...

HARQ

Multiplexing UEn

HARQ

Scheduling / Priority Handling

Logical Channels

Transport Channels

MAC

RLCSegm.

ARQ

Segm.

ARQ

PDCP

ROHC ROHC ROHC ROHC

Radio Bearers

Security Security Security Security

...

RLC Channels

SDAPQoS flow

handling

QoS Flows

QoS flow

handling

June 2018

© 2018 Nokia6

A new set of technologies for a generation leap in capabilities

What is 5G in Release 15? Radio Design (NR)

June 2018

June 2018

* More after Release 16

© 2018 Nokia7

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 parametersDealing with new procedures (beam management etc.)

Spectrum

Finalize 5G frequency bands

Finalize band combinations (many!)

• Any of the area not done right by March 2018 will require corrections in later version of specifications

• UE capability (what is mandatory and what not) also being worked still, some until 09/2018

• In 2018 lot of time is needed for full Release 15 finalization in 3GPP

• Especially Radio Resource Control (RRC) specifications require lot of attention still in 2018

© 2018 Nokia8

Release 16 Timeline Unchanged

8

Rel-16 SI

Q2 Q3 Q4

2019

Q2 Q3 Q4Q1

2020

Q1

Rel-16 SI/WI phase

Rel-16 freeze

Rel-16 ASN.1

Rel-15 SA (option-2)

freeze Rel-15 late drop freeze

2018

Q1

2017

Q4

Rel-15 NSA (option-3)

freeze

Rel-15 NSA (option-3)

ASN.1 Rel-15 SA (option-2)

ASN.1 Rel-15 late drop ASN.1

© 2018 Nokia9

Release 16 Nokia Key Themes – 5G Radio

Industry 4.0, smart city, Private networks

Deployment &

operability

Efficiency enhancements

Unlicensed 5G

NR based IoT UE categories

Enhancements for MIMO, dual connectivity & positioning

Industrial IoT, URLLC enhancements

Integrated Access & Backhaul

Fast Cell Access, Dynamic TDD, RACH Enhancements

5G

Rel-16

New Release 16 topicOn-going SID/WID

Big Data Collection & utilization

© 2018 Nokia10

2018 Q3 2018 Q4 2019 Q2 2019 Q3 2019 Q42019 Q1

NR MIMO WI

NR V2X SI NR V2X WI

eURLLC L1 SI eURLLC L1 WI

NR-U SI NR-U WI

NOMA SI

NR non-terrestrial SI

Existing items

RIM SI

NR Positioning WINR Positioning SI

NOMA continuation ?

NR UE power consumption SI NR UE power consumption WI

RIM+CLI WI

Release 16 Timeline – 5G/ Physical Layer Items

© 2018 Nokia11

2018 Q3 2018 Q4 2019 Q2 2019 Q3 2019 Q42019 Q1

IAB SI IAB WI

NR Industrial IoT SI NR Industrial IoT WI

NR Mobility enhancement SI/WI

NR DC & CA enh. SI NR DC & CA enh. WI

NR V2X SI NR V2X WI

NR-NR DC sync for late drop

UE capabilities SI UE capabilities WI

Existing item

NR SON/MDT SI NR SON/MDT WIRAN3

RAN2

Release 16 Timeline – 5G Protocol/Architecture Items

© 2018 Nokia12

- Both standalone and LAA cases covered

5G Unlicensed Scenario Under Work in 3GPP

• 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

Ref: RP-181339

© 2018 Nokia13

- Scope of the on-going study in 3GPP, higher frequency bands now

removed

5G Unlicensed Physical Layer 3GPP

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

© 2018 Nokia14

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 12/2018

• 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

© 2018 Nokia15

5G Schedule based on LTE History

When Can You Buy a 5G Handset?

3GPP Release 8 March 2009

2009 20102008

Telia LTE launchDecember 2009

12 LTE launches2H/2010

3GPP Release 15 March 2018

2018 20192017

5G launch by end-2018

Several 5G launches2019

LTE

5G

• First 3GPP LTE was launched by Telia in December 2009. 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 developmenttime compared to LTE specification time

• Nokia is working hard to ensure stable specifications from 3GPP side to make this happen

© 2018 Nokia16