Part4 - Strategy

12/12/08 1-

Part 4 – Strategy & trials

Pierre Lescuyer

DIAM

12/12/08 2LTE Part 4 - DIAM

Content

LTE / SAE Macro-planning

Spectrum considerations

Usage

SFR on-going or planned activities on trials LSTI (LTE SAE Trial Initiative)

LTE trial network in SFR


Synthèse Stratégie

L’efficacité spectrale de LTE est meilleure que celle de WiMAX, et comparable à celle de HSPA+.

LTE sera un relais de capacité pour SFR à partir de 2015 – principalement pour un usage data 2015 en raison du timing de disponibilité d'équipements matures réseau et terminaux

La structure de coût de la technologie associée au mode de déploiement macro apparaît encore inadaptée à une offre data pour un marché de masse

Besoins capacité x10 et coût qui devra baisser dans les même proportions

Les fréquences 2,6GHz et UHF sont les meilleures candidates pour SFR pour un déploiement LTE. Les fréquences 2,1 GHz et 900 MHz ne sont pas adaptées à LTE pour SFR dans les 10 prochaines années.

Pertinence de la bande 1800 MHz en cours d'évaluation

Fort impact d'un 4ème entrant sur la stratégie fréquence

(Source: SFR/DS – étude stratégie LTE - juin 2008)


Macro planning – current vision

2009

2010

2011

2012

2013

2014

2015

Stable LTE/SAE standard

Mass Market deploymentLTE as a capacity layer

data cardCommercial availability

Trial start up

First trial equipment available

RU30 HSPA+ deployment

Hot Spot deployment

handsetCommercial availability

Availability of maturenetwork equipments


LTE spectrum

2008 2010 2012 2014 2016 2018 2020

UMTS900 Roll-out

UMTS

2.6 GHz

2.1 GHz

900 MHz

1800 MHz

900 MHz

GSM

URBAN AREAS

RURAL AREAS

in 2x20MHz for hot spot (limited coverage)

not enough spectrum available for LTE

UHF

GSM Phase Out ?

LTE

UMTS (or LTE ?)

LTE

GSM

UMTS

LTE

LTE launch on Hot Spots

HSPA+ launch on Hot Spots

in 2x10MHz first (better coverage than 2.6)

in 2x10MHz


Need for ARCEP positioning (as long as LTE is not an official IMT-2000 technology)Need for ARCEP positioning (as long as LTE is not an official IMT-2000 technology)

LTE – About spectrum (the French view)

New 4G spectrum

900 MHz bandSeems difficult…GSM900 is only 25 MHz FDD spectrumGSM will not disappear within the next 10 years

1800 MHz bandWhy not…but requires some GSM refarming (each operator has ~24 MHz today)

2100 MHz bandWhy not…but very little room (only 15 MHz free today)

2600 MHz bandWhy not…but cells will be even smaller than in 2100 MHz

Bands have been identified by the WRC-07 but nothing was concludedNeed to wait for the next WRC in 2011790-862 MHZ (UHF TV) … 3.4 to 3.6 GHz band …

790-862 MHz bandWhy not…Amount of spectrum is quite limited: 3 x (10MHz in FDD)


Spectrum overview in France

900 UL 875 880 890 900 905 915

900 DL 920 925 935 945 950 960

40 MHz GSM-R BYTCanaux 975 1024 1 50 51 74 75 124

1800 UL 1710 1713 1737 1758 1785

1800 DL 1805 1808 1832 1853 1880

75 MHz SFRCanaux 512 525 527 645 647 751 753 885

UMTS UL 1920 1935 1950 1965 1980

UMTS DL 2110 2125 2140 2155 2170

60 MHz

TDD 1900 1905 1910 1915 1920

20 MHz BYT Lot B Orange SFR

UHF DL 790 800 810 820

UHF UL 832 842 852 862

30 MHz

LTE UL 2500 2570

LTE DL 2620 2690

70 MHz

Lot B Orange

??

SFR

BYTOrange SFR

? ? ?

BYT Orange

SFR BYT

To be defined


LTE Spectral efficiency

HSPA R6 WiMAX

LTE

HSPA+

Maximum theoretical bit rate

Expected spectral efficiency 0.7 b/s/Hz 1.6 b/s/Hz 2 b/s/Hz

10Mb/sover 5MHz

25Mb/sover 5MHzMIMO 2x2



x3

-20%

LTE interest lies in data capacity extension Little interest for cells below 20MHz BW (reduced spectrum efficiency & "HSPA+" competition)


LTE trial network in SFR

Field validation of LTE theoretical values Which performances ?

What about LTE real bit rate performances ?

What are LTE real capacity improvements

SFR deployment strategy validation – in terms of: Frequency and deployment grid

Frequency reuse scheme

Antenna solutions

High

Level

Objectives

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LTE trial objectives

2 main LTE test areas:

LTE engineering and performance evaluation P1: Link budget and coverage evaluation – comparison with 3G/HSPA performances

P1: Field performance

P1: Site engineering validation and compatibility over existing equipments

P2: Test of available mechanisms to support reuse-1 (depending on number of terminals available) ICIC (Inter-cell Interference Coordination)

QOS aware scheduling

Soft frequency reuse

LTE functional testing P1: Basic data session setup

P2: intra-LTE mobility – test of X2 lossless mechanisms, test of intra-LTE hard handover

P3: inter-system mobility – for data application / test of "CS Fallback" mechanisms (depends on EPC

solution availability)

P3: Scheduling performance - using different RT & NRT applications

P1: High

P2: Medium

P3: Low

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LTE trial objectives – as in RFI

HW/SW Requirements

Multi-cell environment 2 to 3 eNodeB at 2.6 GHz

20MHz bandwidth FDD cells in MIMO 2x2

Test of various antenna schemes including new wideband antennas

LTE cells co-located with 3G 2.1 GHz sites

At least 3 data-only LTE terminals

Mechanisms to generate artificial load should also be available

Starting time as soon as Q4 2009

Besides…

EPC solution is also need (emulation ? all-in-one box ?)

1800 MHz and UHF spectrum to be also considered ?

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SFR and LSTI

LSTI stands for "LTE SAE Trial Initiative"

LSTI is a joined initiative with the following objectives Demonstrate 3GPP LTE/SAE capabilities

Stimulate development of LTE/SAE ecosystem

Promote Industrialization of LTE/SAE

Check http://www.lstiforum.org

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SFR and LSTI

Main Telecom players are all part of LSTI

… …

LSTI framework – 3 main phases Proof of Concept: Layer 1 testing of pre-standard solutions

Inter-operability Testing: Early verification of key interfaces using standard compliant equipments

Friendly Customer Trials: System testing using commercial equipments in medium size clusters

Vendors Operators

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SFR and LSTI

The overall LSTI roadmap…

Most probably going to slip over the next few months (due to delayed stable and mature standard delivery)

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SFR and LSTI

LSTI is a closed NDA-protected forum

You need to be part of it to know what's going-on !!

SFR is not yet in LSTI but currently engaged in the application process

Results will be known very soon !!

SFR is planning to contribute (and get access) to the Trial phase including: the test plan description

the definition of targets and objectives in the scope of new services and end-user expectations

the analysis and feedback on results obtained from the trials

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Some last words (as of today…)

LTE should not be seen as a high bit rate technology but rather a capacity technology high bit rate are only available close to the antenna

At cell edge, LTE and HSPA/HSPA+ should perform equally

Is there any incentive to support for Voice over LTE ? CS Voice over HSPA will improve voice support efficiency by 20-30%

Interest of added-value services combined with Voice over LTE is to be studied

Any interest for cell bandwidth below 20MHz ? Dual Carrier HSPA+ is going to be as efficient as LTE over 10MHz

But… LTE will be more future proof

Which kind of coverage for LTE ? 1800 MHz would provide continuous service

Or extensive hot spot strategy at 2600 MHz ?

Part4 - Strategy

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