nr pre-ran1#86bis ericsson view, ran2 - take-5g.org · ›28 ghz very beneficial when coverage is...

5G for Industries | Ericsson Internal | © Ericsson AB 2016 | 2016-09-28 |

5g statusAnd selected challenges

Johan Torsner


v

5G Wireless Access

• Very high traffic capacity

• High data rates everywhere

• Very low latency

• Ultra-high reliability and availability

• Massive number of devices

• Very low device cost

• Very low device energy consumption

• Very high network energy performance

• ...

More than just enhanced mobile broadband

Connectivity anywhere and anytime for anyone and anything

Flexibility for new applications

and usage cases

5

A wide range of

requirements and capabilities

5G status and selected challenges | Ericsson Internal | © Ericsson AB 2016 | 2016-12-16


Current 5g requirements in 3gPP (KPIs – 3GPP TR 38.913)Performance Measure Requirement

Peak data rate DL: 20 Gbps

UL: 10 Gbps

Peak spectral efficiency DL: 30 bps/Hz

UL: 15 bps/Hz

Bandwidth TBD

Control plane latency 10ms

User plane latency, 1-way URLLC: 0.5ms, eMBB: 4ms

Infrequent small packets 10 s

Mobility interruption time 0ms

Mobility Up to 500 km/h

TRP spectral efficiency [3x IMT-A requirement]

User spectral efficiency at

5% percentile

[3x IMT-A requirement]

Area traffic capacity Evaluate

User experienced

datarate

Evaluate

Extreme coverage TDB dB loss, 100km range

Performance Measure Requirement

Connection density 1,000,000 devices/km2

Coverage 164 dB coupling loss

Battery life [15] years

Reliability 1-10-5 in 1ms

NW energy efficiency Evaluate

UE Energy efficiency

Inter-system mobility Yes

Bandwidth scalability Yes

Spectrum flexibility Yes

Support of wide range of

services

Yes

Feasible but challenging!




Industrial Use Case Studies

& Pilots

5g ACCESS timeplan

Rel-15Rel-14 Rel-16

5G Study Item NR Phase 1 NR Phase 2

LTE evo LTE evo LTE evo

Requirements Proposals

5G Commercial

Launch

ITU

3GPP

Specifications

2015 2016 2017 2018 2019 2020

IMT-2020

E2E Network and

Pre-commercial TrialsField Trials

5G Radio PrototypeEricsson 5G

Radio Testbed

EC-GSM-IoT, NB-IoT, LTE-M

Rel-13

LTE


Public | © Ericsson AB 2015 | 2015-08-18 |

› 5G standardization is ongoing at full speed– More than 6000 contributions from more than 100 companies between March and December

– First specifications expected end of 2017 for MBB and fixed wireless access at 3.5 and 28 GHz

3GPP NR status

› Key technical decisions so far

OFDM with scalable sub-carrier spacing (also DFTS-OFDM

optional for uplink)LDPC channel coding for data channels,

Polar coding for physical control channels

Two levels of intra-NR mobility, “beam switching” and “hand-over” Tight NR and LTE interworking based on LTE

dual connectivity framework


High-frequency Operation

Efficiency, dynamic range,

output power, …

Additional transmit-power

limitations above 6 GHz

Challenges

Diffraction Outdoor-to-indoor

penetration

Rain/atmospheric

attenuation

Body loss

PropagationPropagation Implementation

Regulation


› 28 GHz very beneficial when

coverage is good

› Significantly more challenging

propagation at 28 GHz compared

to 3.5 GHz

– Very dense networks needed

– Outdoor to indoor even more

challenging

› Possible solutions

– Beamforming at base station and

terminal side

– (Positioning of terminal antennas)

– Aggregation with lower spectrum

28GHz vs lower frequencies

Datarate at higher bands can be assessed based on

coupling loss at lower bands5G status and selected challenges | Ericsson Internal | © Ericsson AB 2016 | 2016-12-16

Public | © Ericsson AB 2015 | 2015-08-18 | Page 9

Benefits of multi-X-Connectivity

LTE

NR

LTE + NR

Cell edge user Average user

120% increase

24% increase


Ericsson Confidential | 2016-02-08 | Page 10

› Leverage LTE deployment when deploying NR on

higher frequency

– Co-sited and non-co-sited deployments should be supported

– Allow for fast load balancing, mobility robustness, considering

more spotty HF coverage

› Solution shall be based on Dual Connectivity and Fast

intra-RAN (inter-RAT) handovers

› Solution shall be applicable to the initial NR releases

LTE/NR Interworking

Site

LTE NR

Co-deployed

Site 1

LTE NR

Site 2

Different sites

High frequency propagation challenges


Beam based mobility challenges


› Possible solutions

– Efficient signaling solutions

– Multi connectivity

– Control plane diversity for robustness

– …

› Challenges

– Each beam is optimal only within a small

area

– Frequent beam switch or adjustment

required

– Fast link deterioration outside the optimal

beam

– Ultra-Lean design: avoid static signals in

all beams

Beam mobility challenges


› Both multi-X connectivity and beam

mobility being addressed in WP4 and

WP3

› Concept development and standardization

in 3GPP ongoing

› Performance evaluations of mobility

related issues and multi-x connectivity

› Multi-X connectivity prototyping

Relation to take 5


nr pre-ran1#86bis ericsson view, ran2 - take-5g.org · ›28 ghz very beneficial when coverage is...

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