3 test solutions for 4 g devices in r&d or conformance environments

Test Solutions for 4G devices

in R&D or Conformance
environments
Roberto Monteiro
Account Manager (Rohde & Schwarz do Brasil)

I International Workshop on
Challenges and Trends for
Broadband Mobile Networks –
Beyond LTE-A

Standards

Different standards, study groups, and different applications

Core specification
Test specification

Work Items (WI)

Novembro 2013 | Roberto Monteiro | 2

Test needs

Mobile comms, Non-mobile comms, all together today
HSPA

Non-Cellular

HSPA+
1xEV-DO
0AB

WCDMA
DC
HSDPA

Cellular

TDSCDMA

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

LTE-FDD
LTE-TDD

GSM
(E)GPRS
Wifi
Offloading

FM Stereo
ISDB-Tb

GPS

Bluetooth

Glonass

BT EDR

Galileo

BT LE


WLAN
abgn

WiFi OffLoading
WLAN <-> LTE

EPC

Internet

3GPP
Access

Wi-Fi
Access

Handover

seamless,
individual flows

EPC

Internet

3GPP
Access

UE

Wi-Fi
Access

UE

VoIP

Video Conf.


Web

FTP

Test needs

HSPA

Non-Cellular

HSPA+
1xEV-DO
0AB

WCDMA
DC
HSDPA

Cellular

TDSCDMA

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

LTE-FDD
LTE-TDD

GSM
(E)GPRS
Wifi
Offloading

FM Stereo
ISDB-Tb

GPS

Bluetooth

Glonass

BT EDR

Galileo

BT LE


WLAN
abgn

Test needs

HSPA

1xEV-DO
0AB

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

LTE-FDD
LTE-TDD

GSM
(E)GPRS

LTE-R10
2CC 2x2
MIMO

FM Stereo
ISDB-Tb

Non-Cellular

HSPA+

WCDMA
DC
HSDPA

Cellular

TDSCDMA

GPS

Bluetooth

Glonass

BT EDR

Galileo

BT LE

Wifi
Offloading


WLAN
abgn

Carrier Aggregation
LTE Release 10


LTE Adv. Carrier Aggregation


Test needs

HSPA

1xEV-DO
0AB

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

LTE-FDD
LTE-TDD

GSM
(E)GPRS

LTE-R10
2CC 2x2
MIMO

FM Stereo
ISDB-Tb

Non-Cellular

HSPA+

WCDMA
DC
HSDPA

Cellular

TDSCDMA

GPS

Bluetooth

Glonass

BT EDR

Galileo

BT LE

Wifi
Offloading


WLAN
abgn

Test needs

HSPA

1xEV-DO
0AB
LTE-FDD

LTE-TDD

GSM
(E)GPRS

LTE-R10
2CC 2x2
MIMO

FM Stereo
GPS

BT EDR

Galileo

BT LE

Wifi
Offloading

Bluetooth

Glonass

FADING

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

ISDB-Tb

Non-Cellular

HSPA+

WCDMA
DC
HSDPA

Cellular

TDSCDMA


WLAN
abgn

BLER results with and without fading


Test needs

HSPA

1xEV-DO
0AB
LTE-FDD

LTE-TDD

GSM
(E)GPRS

LTE-R10
2CC 2x2
MIMO

FM Stereo
GPS

BT EDR

Galileo

BT LE

Wifi
Offloading

Bluetooth

Glonass

FADING

Mobile
WiMAX

CDMA2000
1xRTT

EDGEevo
VAMOS

ISDB-Tb

Non-Cellular

HSPA+

WCDMA
DC
HSDPA

Cellular

TDSCDMA


WLAN
abgn

End to End (E2E) Data and Call
Performance
l Crucial for user experience of data services
l Verify quality of data and voice services
l

Service availability
l At cell borders
l

During handovers

Good service ideas may fail
when the required performance
is not available

Testing UE Performance with Realistic
Radio Conditions

LTE CA BTS

3G BTS
LTE BTS

Throughput and call performance
measurement with
l
Noise (AWGN, OCNS)
l
Fading
l
During HO


Performance testing of Applications
l Web page Loading
l Video quality testing
l Audio performance testing

CMW-PQA


VTE Video
Analyzer

UPV Audio
Analyzer

Voice over LTE (VoLTE) testing
Different test setups
R&S®CMW-ATE

LTE attach procedure
 IMS terminal testing
 Session Initiation Protocol
(SIP)
 Conformance Testing
 Audio: Echo verification in
loopback mode

R&S®CMW-PQA

Functional
testing

LTE attach procedure
 IMS registration
 Audio: Echo verification in loopback mode
 IP Traffic Logging
 Impact of noise, IP traffic impairment
 Automation via R&S CMWrun sequencer
tool

Audio Quality
testing

R&S®CMW500 LTE Call-box

R&S®UPV Audio Analyzer

 Verify audio quality using
PESQ® and POLQA®
algorithm
 Acoustic analysis:
3GPP TS 26.132

Performance
testing

 Automated performance testing
 impacts of noise, fading, IP traffic impairments on
audio quality
R&S®UPV Audio Analyzer


1

Image quality analysis with the R&S VTE
H.264/MPEG4AVC
1080p
R&S talking head

2 MBit/s
ı SSIM: 0.9821
ı PSNR: 38.13 dB
ı MOSV: 85.14%
50 kBit/s
ı SSIM: 0.7812
ı PSNR: 25.68 dB
ı MOSV: 22.32%


What is the picture failure point?
Error free
ı C/N > 18 dB
ı BER <1.40e-03

C/N = >18,00 dB
1,2
1

SSIM

0,8
0,6
0,4
0,2
0
0

10

20

30

40

50

60

t in s

C/ N = 17,60 dB

Picture failure point
ı C/N 17,60 dB
ı BER 3.30e-03

1,2
1

SSIM

0,8
0,6
0,4
0,2
0
0

10

20

30

40

T in s

50

60

(BER = after Viterbi)

Σtime(PSNR drop) > 120ms = picture failure point

Influence of SNR on picture failure


LARGE NUMBER OF TESTS DEMAND…
AUTOMATION
REPEATABILITY
FIDELITY

Performance

Automated tests for 3GPP verification


Performance

Network Operators, R&D Labs


BUT SOMETIMES A CALLBOX IS NOT
ENOUGH…
PROTOCOL TESTS…

DEEP ANALYSIS
OR SIMPLY…..

Protocol tests
l R&D and verification

l Conformance Testing

Testing
l MLAPI / LLAPI

l ETSI

Medium / Lower Layer Application
Programming Interface
LLAPI:
PHY Layer
Link Layer
MAC Layer
MLAPI
RRC Layer
Layer 3
DAU
Upper layers


European Telecommunications Standards
Institute

l TTCN
Testing and Test Control Notation
TTCN-1 (no longer used)
TTCN-2 (still widely used today)
TTCN-3 (current version and “universal”)

Protocol Test with MLAPI or TTCN
LLAPI
Testcase

MLAPI
Testcase

CMW500 LTE
Protocol Stack

TTCN
Testcase

NAS

RRC

Layer 3 MLAPI
Layer 2 LLAPI

PDCP

TTCN API

RLC
MAC
PHY

ı Testcase created in C++ (MLAPI, IOT) or TTCN (Conformance)
ı  Focus on UE signalling procedures


TTCN
Runtime
Adapter

CMWcards – Closing the gap
RF Tester
„CallBox“

Protocol Tester
„CMWcards
Signaling Tester“


CMWcards – Closing the gap
high
„CMWcards
Signaling Tester“

Ease of Use

RF Tester
„CallBox“

CMWcards
Protocol Tester

low

Flexibility

high

CMWcards – Key Features
l Inter-RAT capabilities
l LTE  WCDMA
l LTE  GSM
l WCDMA  GSM
l Triple-RAT LTE / WCDMA / GSM
l LTE  CDMA2000

LTE cells /
WCDMA cells

l Multi-cell support
l 2 cells on CMW500 standalone
l 4 cells on CMW500 Multibox

0

2

3

4

Single

0

1

Single

Multi

Multi

Single

Single

Multi

Multi

-

2

Single

Multi

Multi

-

-

3

Multi

Multi

-

-

-

4


1

Multi

-

-

-

-

CMW500 Use Cases
RF Tester
„CallBox“

Protocol Tester
„CMWcards
Signaling Tester“

RF parametric
tests

BLER
measurements

RMCs

Protocol
Conformance

IOT
Acceptance

R&D
LLAPI/MLAPI
scenarios

Dynamic
behaviour

PRACH

Tx/Rx
measurements

TTCN2/3 R&D
development

L1 – L3 and
above
debugging

Multicell
scenarios > 2
cells

Ack/Nack
measurements

Basic
IMS/VoLTE

UL Power
Control

Inter-RAT
scenarios

Triple-RAT

…

Transmit Power
Control

…

…

…

…

…


CMWcards Use Cases
„CMWcards
Signaling Tester“

• LTE, WCDMA (GSM and CDMA2000 planned) in one
GUI
• LTE Rel-10 carrier aggregation supported

• Basic registration and attach procedures
• Attach Reject and other failure causes
• Security and ciphering
• Intraband and interband cell
selection/reselection/handover
• Inter-RAT cell
selection/reselection/handover/redirection
• IMS and VoLTE including CS fallback
• SRVCC (planned)
• LTE and WCDMA Throughput Tests


Conformance
36.521 / 36.523

l Protocol Conformance (3GPP 36.523)

l Up to 8 cells (2G/3G/4G) at

sametime
l Or 2xCC 2x2 MIMO LTE R10 + 1x 2G + 1x 3G + 1x 4G
2x2 MIMO
l No extra Hardware
required!!!
l And you can use your
existing CallBox hardware

The road to Full Type Approval System
RF Full Type Approval System (3GPP 36.521)

TS80CON
N

CMW500

TS-PQA
+real time fading

TS8980S

TS-RRM

TS8980IB

TS8980FTA

+Multi-RAT

+self-calibration
for max. RF accuracy

+ out-of-band and
TV interferer tests

+interferers

RF tests
Protocol conformance / R&D
Performance Quality Analysis (PQA)
RF precompliance
RRM conformance

RF conformance
Network operator suppl. RF conformance
e.g. Verizon, AT&T, USCC, Sprint

AND LAST BUT NOT LEAST…


What do we do about “Beyond 4G / 5G”?


THANK YOU!!!!


3 test solutions for 4 g devices in r&d or conformance environments

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3 test solutions for 4 g devices in r&d or conformance environments