the path from 4g to 5g: technology development from the …...lapi coverage 4 overload control 5g...

The path from 4G to 5G:

Technology development from the

test & measurement perspective

Dr. Taro Eichler

5G Tokyo Bay Summit

July 23rd, 2015

5G Use cases: Much more than only Mobile BroadbandScenarios & Requirements

ı Mobile broadband / Dense crowd of users:

Mobility, high data rates, high capacity and

partly limited area.

ı Internet of Things (emergency comms,

robots, …):

Low latency, high reliability,

resilience and security;

user case specific

data rates/capacity.

ı Internet of Things (sensors;

leisure applications, …):

The volume of devices and “things”

will create new requirements.

Battery life time expectation years

2

Picture: ETH Zürich/ Golem.de

Very high data rate

Long battery lifetime

Mobility

Massive number of devices

Reliability, resilience, security

Very lowlatency

Very high capacity

Mobile broadband Dense crowd of users

IoT sensor network IoT control network

5G Tokyo Bay Summit 2015

R&S test solutions to investigate, develop and standardize 5G

3

Wideband Signal Tests Channel Sounding Solution

New 5G PHY Candidates E2e Application Testing

R&S®SMW200 R&S®FSW67

R&S®SMW200

I fast measurement directly in time domain

I Support for in- and outdoor sounding I very high dynamic range

Component Characterization

Direct measurements up to 67GHz

I 40 GHz signal generation without need for up-conversion

I 67 GHz analysis w/o down-conv.I 2 GHz bandwidth analysis

Massive MIMO - Beamforming

R&S®ZNBT

R&S®SMW200+6x R&S®SGT100

R&S®AFQ100B

R&S®SMW200

R&S®FSW67

DUT

UP<40 GHz >40 GHz

R&S®RTO R&S®ZVA

I Phase-coherent RF generationI Multi-port VNA

R&S®NGMOR&S®CMW500

DUT

Analyze application behavior like signaling load, delay, power etc.

CONTEST

CMWrun

ARB generator

Signal generator

SpectrumAnalyzer

DigitalOscilloscope

Signal generator

Data AnalysisSoftware

Spectrum Analyzer w/ in-build amplifier

Signal generator

NetworkAnalyzer


IoT and OTT applications3GPP overview – MTC enhancements for LTE-A

Rel. 10 Rel. 11 Rel. 12 Rel. 13

Extendedaccess barring

Power savingmode

Expected UE behavior

UE Category 0

Coverage enhancement

Low-cost bysmaller BW

Signaling reduction

Low cost UE

Battery life

Low cost UE

Delay tolerant access & LAPI

Overload control

Extended DRX

Battery life

Long PRU/PTU timer per UE

Minimum periodic search timer

Attach with IMSIindicator

Signaling reduction

Device triggering

Reachability

OverrideLAPI

Coverage

4

Overload control


R&S Test SolutionCMW-PQA OTT Test Setup

5

Power Consumption

goes up each time UE

goes into RRC

connected stateBackground light

switching off

Switch on

For power consumption

measurement

RF

LAN

DAU connection

to the Internet

OTT APPs Server

R&S®CMW500

Wideband Communication tester

R&S®NGMO

Contest PC

GPIB

Internet

or


Exemplary ResultsDifferent apps and their influence on mobile device behavior

6

Facebook Twitter


millimeter waves 100 GHz

Exploiting the millimeter-wave spectrum (30 – 300 GHz).

5G spectrum expectations

wavelength λ [mm]

54 GHz

3 GHz

100 GHz

57 GHz300 GHz

all cellular

communication60 GHz oxygen

absorption band

Water vapor (H2O)

absorption band

potential 254 GHz

available bandwidth!

183.31 GHz64 GHz 164 GHz 200 GHz

100 5 1.64 1

Att

en

uati

on

in

dB

/km

Frequency in GHz

28 GHz, 38 GHz, 45GHz, 73 GHz ?

5G Tokyo Bay Summit 2015 7

3GPP Time Plan for 5GChannel modeling: First and important step


Schematic channel sounding setup (solution with Fraunhofer HHI)

PN

Gen.

fchip f0 GTx

SMW200A

f0

IQ Data

GRx

FSW

Channel

LNA

t

delay spread

|h|²


Channel sounding in anechoic chamber (R&S HQ)

Horn transmit antenna

dipole receive antenna


Reference Measurements (Reflector @ 2.0 m Distance)

4 m


Typical Result of Mobile Measurement


• TX-RX distance: 25–0 m, full

measurement run with

62,500 CIRs

• Averaging over 10 cm

segments (250 CIRs) to

obtain APDP

• Significant multipath

contributions (MPC)

• Channel length: several

hundred ns

• Large-scale fading of MPCs

due to RX movement and

time-variant environment

• Also Fading in first MPC

(“LOS component”)

Base Station Antenna TestingDynamic Beamforming Analysis – Proof of Concept @ 75 GHz

QPS100 Security Scanner Tx Antenna

Photograph of test setup

Top view

QPS100

AUT

x

z

y

Side view

QPS100

AUT

x z

y40 cm

35 cm

Frequency range: 70-80 GHz

Dimensions: 2 m x 1 m



Mag/ dB @ 75 GHz

Measurement setup

(top view)

QPS100

x

z

y

Base Station Antenna TestingDynamic Beamforming Analysis – Poof of Concept @ 75 GHz

-0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5

-1

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

0.8

1

x / m

y /

m

75 GHz

-50

-45

-40

-35

-30

-25

-20

-15

-10

-5

0

AUT

2015-06-15 Over-the-air test concepts for active antenna arrays 8

Summary

ı The most significant test & measurement impact is expected from:

Use of mm-wave frequencies while additional spectrum is explored from low to high

Channel sounding and new channel models remain an essential subject

New air interface candidates – still a number of options are investigated

convergence required (essential for ecosystem)

The need to enhance OTA measurements due to Massive MIMO and

advanced active antenna implementation

Support for high number of devices (IoT / M2M) and D2D communication

C/U splitting and optimized MAC/RRM and architectural trends like C-RAN

Significant 5G research is ongoing (strong global momentum),

but we are still at the research, educational and pre-R&D level

R&S has rich experience ranging from mm-wave implementation to end user

experience / benchmarking enabling all-embracing 5G performance assessment


the path from 4g to 5g: technology development from the …...lapi coverage 4 overload control 5g...

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