Lte continuing the evolution of mobile broadband networks

LTE: Continuing the Evolution of Mobile Broadband Networks

Angel R. Hernaes

Ericsson, Latinoamérica

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LTE – Evolucion de tecnologías inalámbricas | 2013-07-31 |

history #NBCPOPE

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a new era! #NBCPOPE

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Mobile Subscription growth

Mobile subscriptions by region, Q1 2013

CAGR 2012-2018: 6%

Note: Number of subscribers around 4.5 billions

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9.1 billion Mobile subscriptions end 2018

› LTE is now growing strongly

› 20M new subscriptions added in Q1 2013

› WCDMA/HSPA continuously growth

› 60M new subscribers (3X more than

LTE)

› Over 60% of net adds in 2013

› .GSM/EDGE slow growth

› only added around 30M new subscribers.

Mobile subscriptions by technology, 2009-2018

107 Million

LTE SUBSCRIPTIONS

May 2013 Source: WCIS

2 Billion

LTE SUBSCRIPTIONS

END 2018 Source: Ericsson

LTE M2M subscriptions not included

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Technology by regions

› Several technology shifts ahead

Technology refers to the highest technology the device & network can support

2012 2018

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12 times Mobile data Traffic by end of 2018

2.5 GB

0.6 GB

0.45 GB

Monthly consumption per device type Global mobile traffic: voice and data 2010-2018

11 GB

3.1 GB

1.9 GB

2012 2018

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population Coverage

› LTE deployments continue in all regions

– LTE population coverage doubled in 2012 compared to 2011 (10% vs 5%)

85% WCDMA/HSPA POPULATION

COVERAGE IN 2018

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Application coverage the area where my app works as I expect

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Latin América

Base: 850 & 1900

New: AWS & 2600

2013+: APT700

MEA

Base: 2100

New: 900, 1800 & 2600

2013+: CEPT800 & APT700

APAC

Base: 2100, 900 & 850

New: 1800, 2300 & 2600

2013+: APT700

Japan

Base: 2100, 1700, JP850

New: 1500, 900 & APT700

Europa

Base: 2100 & 900

New: 2600, 1800 & CEPT800

North America

Base: 850, 1900, US700 & AWS

New: 2600

spectrum for mobile broadband Regional mainstream hspa & lte deployments

opportunity for LTE TDD in 2.3 & 2.6 GHz bands – same FDD/TDD Equipment

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3GPP LTE spectrum

Available

FDD

Band Identifier Frequencies (UL/DL)

1 IMT Core band 1920 - 1980 / 2110 - 2170

2 PCS 1900 1850 - 1910 / 1930 - 1990

3 1800 1710 - 1785 / 1805 - 1880

4 AWS 1710 - 1755 / 2110 - 2155

5 850 824 - 849 / 869 - 894

6 850 (Japan #1) 830 - 840 / 875 - 885

7 IMT Extension 2500 - 2570 / 2620 - 2690

8 900 880 - 915 / 925 – 960

9 1700 (Japan #2) 1749.9 - 1784.9 / 1844.9 - 1879.9

10 3G Americas 1710 - 1770 / 2110 - 2170

11 1500 (Japan #3) 1427.9 - 1447.9 / 1475.9 - 1495.9

12 US 700 Lower A,B,C 699 - 716 / 729 - 746

13 US 700 Upper C 777 - 787 / 746 - 756

14 US 700 Upper D 788 - 798 / 758 - 768

17 US 700 Lower B, C 704 - 716 / 734 - 746

18 850 (Japan #4) 815 - 830 / 860 - 875

19 850 (Japan #5) 830 - 845 / 875 - 890

20 CEPT 800 832 - 862 / 791 - 821

21 1500 (Japan #6) 1447.9 MHz - 1462.9 / 1495.9 - 1510.9

23 US S-band 2000 - 2020 / 2180 - 2200

24 US L-band 1626.5 - 1660.5 / 1525 - 1559

25 PCS 1900 G 1850 - 1915 / 1930 - 1995

TDD

Band Identifier Frequencies

33 TDD 2000 Lower 1900 - 1920

34 TDD 2000 Upper 2010 - 2025

35 TDD 1900 Lower 1850 - 1910

36 TDD 1900 Upper 1930 - 1990

37 PCS Center Gap 1910 - 1930

38 IMS Extension Gap 2570 - 2620

39 China TDD 1880 - 1920

40 2300 2300 - 2400

41 US 2600 2496 - 2690

42 3500 3400 - 3600

43 3700 3600 - 3800

TDD (work in progress)

Band Identifier Frequencies

TBD APT 700 LTE 698 - 806

FDD (work in progress)

Band Identifier Frequencies (UL/DL)

[22] 3500 3410 - 3490 / 3510 - 3590

[26] E850 Upper 814 - 849 / 859 - 894

[27] 850 Lower 806 - 824 / 851 - 869

[28] APT 700 LTE 703 - 748 / 758 – 803

[29] LTE DL FDD N/A / 716-728

Plan exists

No Plan

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LTE is the Global standard for Next Generation MBB

CDMA Track (3GPP2)

GSM Track (3GPP)

2001 2005 2008 2010

LTE

FDD and TDD

GSM WCDMA HSPA

TD-SCDMA

CDMA One EVDO Rev A

Mobile System Evolution

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Driving forces behind LTE

› Performance: – Higher peak rates

– Higher bandwidth

– Designed for ”always on applications” from start

› Spectrum flexibility: – Use of new, re-farmed or unused spectrum

– FDD and TDD

– Variable channel bandwidth

› Cost: – No circuit switched domain

– Low OPEX

– Simpler operation with less to configure and higher degree of self configuration

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EPC - Evolved Packet Core

eUTRAN - Evolved UTRAN

EPS – Evolved Packet System

Evolved Packet System

LTE - Long Term Evolution

EPS

EPC

eUTRAN

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S1 S1 S1

X2 X2

eNode B eNode B eNode B

Evolved

Packet

Core

Evolved

UTRAN

Network Architecture interfaces

MME = Mobility Management Entity

P/S-GW = PDN/Serving gateway

IP

networks HSS

EPC

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S1 UP S1 CP

X2 X2

eNode B eNode B eNode B

Evolved

Packet

Core

Evolved

UTRAN

MME SGW S11

Network Architecture interfaces

MME = Mobility Management Entity

P/S-GW = PDN/Serving gateway

IP

networks HSS

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Key LTE radio access features

TX TX

Advanced antenna solutions › Diversity

› Spatial Multiplexing (MIMO)

› Directivity

1.4 MHz . . . 20 MHz

Spectrum flexibility › Flexible bandwidth

› New and existing bands

› FDD & TDD

SC-FDMA

OFDMA LTE radio access

› Downlink: OFDMA, Uplink: SC-FDMA

› Modulation: QPSK, 16QAM or 64QAM

Simplicity – Low TCO › All IP

› SON

IP transport

SON

FDD TDD

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Downlink OFDM - Orthogonal Frequency Division Multiplexing

› Characteristics

– Orthogonal: Other carriers zero at sampling

point

– Large number of 15 kHz sub carriers

– Long symbol time

› Benefits

– Spectrum flexibility

› Frequency diversity & flexible BW

– Robust against ISI

– Cost effective for wide carriers

– Well established

frequency

f = 15 kHz

User 1

User 2

User 3

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LTE DL Physical Resources

f = 15 kHz

One Resource Block

12 x 7 = 84 resource elements

12 sub-carriers

frequency

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LTE DL Physical Resources

f = 15 kHz 12 sub-carriers

frequency

One Scheduling Block

(2 Resource Blocks)

180 kHz and 1 ms

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Uplink SC-FDMA – Single Carrier FDMA (DFTS-OFDM)

› Similar to OFDM

– 15 kHz tones BUT consecutive

– Same time-domain structure

› Low Peak-to-Average Power Ratio

– Lower terminal cost and improved battery life

frequency

SC-FDMA enables low PAPR that gives more than 4 dB better link budget and reduced power

consumption

User 1

User 2

User 3

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Link adaptation Layer 1 feature

› Time Domain

– Modulation scheme

– Channel coding

› Frequency Domain

– Possible!

› HARQ (Hybrid Automatic Repeat request)

– 10% retransmissions optimal

16QAM

4 bits/symbol 2 bits/symbol

QPSK

64QAM

6 bits/symbol

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Advance antenna techniques

› Single-Input, Single-Output (SISO).

› Single-Input, Multiple Output (SIMO), Rx

Diversity.

› Multiple Input, Single-Output (MISO), Tx

Divesity.

› Multiple-Input, Multiple-Output (MIMO), Tx

and Rx Diversity.

SISO

MISO

SIMO

MIMO

Transmit

Antennas

Radio Channel Receive Antenna

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Beam-forming

Beam-forming can be used to limit interference

4x2 adds beam-forming to 2x2 Spatial Multiplexing

Beam-forming can be another

way of improving cell edge

Constructive Destructive

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Spectrum flexibility

› Bandwidth & Resource Blocks

– Flexible bandwidth

– Smallest bandwidth

› 6 Resource Blocks

› 1,08 MHz + guardband = 1,4 MHz

– Largest bandwidth

› 100 Resource Blocks

› 18 MHz + guardband = 20 MHz

› LTE spectrum

– Paired and unpaired spectrum on the same HW platform

– FDD and TDD

– New and existing bands

Channel Bandwidth BWChannel [MHz] 1.4 3 5 10 15 20

Number of Resource Blocks (nRB) 6 15 25 50 75 100

Bandwidth [RB]

Transmission Bandwidth Configuration [RB]

Channel Bandwidth [MHz]

Reso

urc

e b

lock

Cha

nn

el e

dg

e

Cha

nn

el e

dg

e

Active Resource Blocks

fDL

fUL

FDD

Highest data rates for given

bandwidth and peak power

fDL/UL

TDD

Unpaired spectrum

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Technology comparison

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LTE release evolution

• LTE RAN support terminals up to the mentioned 3GPP release

• Mandatory 3GPP RAN functionality is supported

• Optional 3GPP RAN functionality is supported according to Roadmap

3GPP Rel- 8 3GPP Rel-11

Stability and Robustness

OAM and SON

End User Performance

Capacity Prepared Hardware Commercial

VoLTE

Add Capacity and Features in Accordance with Operator Need Over Time

Multi Standard RBS Small cell RBS

3GPP Rel-9

Services Advanced QoS

features

Carrier aggregation

Heterogeneous NW

3GPP Rel-11 features

Features to support

future services and

growth

3GPP Rel-10

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Evolution of Mobile Broadband

84 Mbps

150 Mbps

300 Mbps

42 Mbps

21 Mbps

1000 Mbps

~2016

~1000 Mbps

Operator dependent

Operator dependent

2013

~150 Mbps

10-100 Mbps

5-50 Mbps

Market impact

Peak rate

Typical user rate downlink

Typical user rate uplink

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carrier aggregation

Frequency band A Frequency band B



› First step of LTE Advanced

› FDD & TDD

› Commercial launch mid ‘13 (FDD)

› Up to 20MHz with 2 carriers

› Higher bandwidths to follow

› Unique battery saving algorithms

Increased end-user experience

Increased system capacity

Baseline

2x spectrum

Do

wn

link th

rou

gh

pu

t

Cell edge Good radio

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MEET TRAFFIC DEMAND

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Useful reading

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Lte continuing the evolution of mobile broadband networks

Technology

Transcript of Lte continuing the evolution of mobile broadband networks