© Fraunhofer IIS

OPEN-AIR-INTERFACE BASED MEASUREMENT METHODOLOGY FOR THE E-MBMS CHARACTERIZATION IN LTE-A NETWORKS

2016 Tyrrhenian International Workshop on Digital Communications (TIW16)

13.09.2016, Livorno, Italy

©Fraunhofer IIS/Kurt Fuchs

Dr. Javier Morgade

Senior Engineer, Broadband and Broadcast Department Fraunhofer Institute for Integrated Circuits (IIS), Erlangen

© Fraunhofer IIS 2

Open-air-interface based measurement methodology for the eBMSM service characterization in LTE-A Networks

Outline

Motivation

IMB5 Project

eMBMS Testbeds

UE side OpenAirInterface – eMBMS

Video Demo: Fraunhofer IIS LTE-A Testbed

Summary and Outlook

© Fraunhofer IIS 3

Motivation Broadcast / Multicast Services in 5G

5G:

Will become a worldwide standard

High performance networks and smartphones / tablets

Efficient Audio/video coding

Millions of potential Broadcast and interactive receivers

eMBMS:

Evolved Multimedia Broadcast Multicast Service (3GPP)

IMB5 Project:

Built-up two eMBMS trials networks for terrestrial TV distribution in MBSFN mode

Investigate system optimizations

Proposals for 3GPP standardization

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IMB5 Project Facts “Integration of LTE Broadcast in 5G”

© Olivier Le Moal – Fotolia.com

Partner Role

Coordinator, demo center, trials, standardization, coverage planning

Erlangen network, trials, UE SDR development, standardization, simulations

eNodeB, network technologies, standardization, coverage planning

UE SDR development

Measurement equipment

Application scenarios

Testbed sites, fiber connection, Test drives

Co-funded by

Duration 04/2014 – 05/2016

© Fraunhofer IIS 5

eMBMS Testbed Infrastructure (1) Open large scale Erlangen Installation (Fraunhofer IIS LTE-A)

© Olivier Le Moal – Fotolia.com Erlangen and vicinity,

RAN

Erlangen-Tennenlohe, eMBMS subsystem

ePC, Erlangen-Tennenlohe

S1GEth

fiber(s)

fiber(s)

Tennenlohe Turm50m

Stadtwerketurm135m

Macro2eNB (3

sectors)

Macro1eNB (3

sectors)

X2

S1Microwave

link(~150 Mbps avail for LTE)

S1-U

MME

S-GW P-GW

HSS

S5

PCRF

S6a

PDN

SGi

S1-MME

MBMS-GW

BM-SC

Sm

M1

M3

SGi-mb

SGmbContent Provider

SGi

MCEM2

GPS

GPS

Gx

S11

Rx

Two eNodeB, 3 sectors each

MBSFN operation

LTE Band 17 (700 MHz, 5 MHz BW)

600 W EIRP

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eMBMS Testbed Infrastructure (2) Large scale Munich Installation

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Single eNodeB, 4 RRH (MBSFN)

LTE Band 28 (700 MHz, 10 MHz BW)

400 W EIRP

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User Equipment (UE) Platforms (1) Based on Commercial Equipment

Established Equipment:

R&S TSMW single antenna RF scanner with ROMES drive test tool

Qualcomm Mobile Test Platform (=> Smartphone for experimentation)

Samsung S5, enabled for eMBMS (Korean version)

Drawback:

Limited to current eMBMS waveform and LTE chips

No experimentation of future waveform extensions possible

© Fraunhofer IIS 8

User Equipment (UE) Platforms (2) Software Defined Radio (SDR) Platforms Two SDR Platforms tested in IMB5:

National Instruments PXI Platform

OpenAirInterface LTE SW Stack

UE-side generic eMBMS implementation

UE-side de-scheduler MAC, RLC, RRC

Why OpenAirInterface ?

Common PC processor architectures

Rapid prototyping (plain C)

“Cheap” Compatible Frontends (RF HW)

Access to all Layer 1..3 stack!

Experimentation with

LTE waveform extensions (e.g. eMBMS)

Flexible antenna configurations

© Fraunhofer IIS 9

User Equipment (UE) Platforms (3) UE side OpeAirInterface - eMBMS

Fraunhofer IIS Contributions

Service Orchestrator (Multicast IP Forwarding)

FLUTE (File Delivery) MAD*

RTP (Real-time Transport Protocol) VLC

LTE-RLC/RRC

LTE-MAC

Generic MCH scheduler

MCH: MCCH, MTCH

LTE-PHY

PBCH, PDCCH, PDSCH

SIB1,SIB2,SIB3, SIB13

PMCH

(*) MAD Project's Home Page http://mad.cs.tut.fi/

© Fraunhofer IIS 10

Fraunhofer IIS LTE-A Testbed Erlangen (1) Fraunhofer IIS LTE-A Network + UE side OAI eMBMS

IMB5 more details paper @ EuCNC 2016

Trials show: Coverage can be improved by waveform extensions, e.g. longer cyclic prefix current 3GPP Work Item

Fraunhofer IIS LTE-A eMBMS Testbed OpenAirInterface - UE

Real-Time Transport Protocol (RTP) OAI + VLC

File Delivery over Unidirectional Transport (FLUTE)

OAI + MAD (*)

eMBMS MCS class (QCI) OAI Generic MCH scheduler

RRC Connection + USIM Fhg IIS testbed integrated

Non-Access Stratum (NAS) Integration tasks ongoing

(*) MAD Project's Home Page http://mad.cs.tut.fi/

© Fraunhofer IIS 11

Fraunhofer IIS LTE-A Testbed Erlangen (2) Fraunhofer IIS LTE-A Network + UE side OAI eMBMS

OpenAirInterface now includes eMBMS in the UE; interoperability with commercial Nokia eNodeBs and Athonet ePC Video Demo

© Fraunhofer IIS 12

Summary and Outlook Summary:

Two eMBMS testbed infrastructures established (Erlangen, Munich)

Trials were used to prove the coverage planning

eMBMS waveform extensions are required, especially longer CP

OpenAirInterface + eMBMS in the UE; interoperability with commercial Nokia eNodeBs and Athonet ePC

Outlook:

Other potential improvements of eMBMS reception to be investigated

MIMO, physical layer (IQ) time interleaving

Effect of MRC with different antenna configurations

3GPP Activities

LTE Work Item „eMBMS Enhancements“ (WID: RP-160675): Longer cyclic prefix, 100% for Broadcast, Study on standalone operations

New Radio (NR) Scenarios and Requirements (TR 38.913): „MBMS Services“ (text proposal in RP-161242, not yet agreed)

© Fraunhofer IIS 13

Open-air-interface based measurement methodology for the eMBMS characterization in LTE-A Networks

Dr. Javier Morgade

Senior Engineer, Broadband and Broadcast Department

Tel.: +49 9131 776-6334

E-Mail: javier.morgade@iis.fraunhofer.de

Internet: www.iis.fraunhofer.de

© Anton Balazh 2012 - Fotolia.com ©Fraunhofer IIS/Kurt Fuchs

Contact

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Extra Slides: Experimentation Results (1) Scope

Goals of experimentation in trials networks – IMB5:

Few literature available on eMBMS measurements

Identify potential improvements of eMBMS waveform beyond Rel-13.

Verification of eMBMS coverage planning of MBSFN’s by comparison with measurement results

Investigation on performance of future waveform extensions (mainly CP)

© Olivier Le Moal – Fotolia.com

© Fraunhofer IIS 15

Extra Slides: Experimentation Results (2) Verification of coverage planning with measurement results

SINR for Munich test route (55 km):

Simulated for CP of 16.7 us (yellow), 33.3 us (green) and 66.7 us (red)

Good agreement of simulation with measurements (blue) of transmitted signals (CP 16.7 us)

© Fraunhofer IIS 16

Extra Slides: Experimentation Results (3) Simulated Coverage Area for Munich Testbed

CP 16.7 us => Existing eMBMS Self-interference due to small CP

CP 66.7 us => Future eMBMS Significant better coverage

Coverage 100% 265% 467%

66.7 us 33.3 us Cyclic prefix 16.7 us