Why Why Why Why

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Jan. 2012

4G

Presented by

YL Huang, Ph.D.

November 2012


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2Confidential Material for Internal Use Only

Agenda

4G LTE Current Status

4G LTE Key Technologies and Features

4G LTE Mobile/Fixed Device Application

Summary


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LTE Deployment Status

GSA confirms that 105 operators have launched commercial LTE networks

in 48 countries. (Oct. 1, 2012.)

GSA forecasts that 159 networks will be commercially launched in 68countries by the end of 2012.


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LTE Spectrum

UL/DL

FDD

TDD

Spectrum dispersed.

Some bands are even overlapped.

Usually several bands are neededin one terminal.

Some devices has both FDD and

TDD.


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Spectrum Efficiency

Spectrum efficiency (bits/sec/Hz) is the major factor that

operators concern.

Spectrum re-farmed is another way of improving spectrum

efficiency for an operator, which has spectrum for elder

generations.

The benefits from deploying LTE networks in re-farmedspectrum are increasingly recognized by regulators and the

industry.

Some examples of spectrum re-farmed.

Band 3, 1800 MHz (EU, DCS1800).Band 4, 1700 MHz (US, AWS-1, Advanced Wireless Services).


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4G LTE FDD and TDD

The LTE standard was specified by 3GPP with an FDD mode for use

in paired spectrum, and a TDD mode for use in unpaired spectrum.

FDD and TDD modes are fully complementary. TDD shares most of

the FDD design and standards (Layer 2 and above) and uses a

common core network.

FDD LTE is adopted by most of the operators world wide, mainly on

700MHz (B12/13/14/17)

800MHz (B20)

1800MHz (B3)

2600MHz(B7).

Many WiMAX operators migrate to TDD LTE, mainly on 2.3GHz

(B40) and 2.6GHz (B38); some operators will also use 3.5GHz (B43).

Some operators have commercially launched LTE service using bothFDD and TDD.


7/157Confidential Material for Internal Use Only

3GPP Rel. 8/9, LTE Key Technologies and Features

20MHz, OFDM/SC-OFDM

DL 4x4 MIMO

SON, HeNB

SAE For LTE Access

CS Fallback in EPS

SRVCC

Peak: DL 300Mbps, UL

75Mbps

Enhanced Dual-Layer Tx

SON/HeNB Enhancement

TM8

IMS Emergency Calls

LCS for LTE and EPS

MBMS support in EPS

Peak: DL 300Mbps, UL

75Mbps

Release 8 Release 9



3GPP Rel. 10/11, LTE-A Key Features & Technologies

DL 8x8 MIMO, UL 4x4 MIMO

Carrier Aggregation

HetNet, MDT

HeNB Local IP AccessWiFi offloading

Machine Type Communication

Peak: DL 1Gbps, UL 500 Mbps

CoMP

Enhancement of Rel.10 features

System Improvement of MTCService Awareness and Privacy Policies

IW MNO and Application Provider

Release 10Release 11



Voice Service with LTE (1)

CSFB (Circuit Switched Fallback)Advantage: Not need IMS.

Disadvantage: Connection delay due to network switching.

SVLTE (Simultaneous Voice and LTE)Advantage: Not specific requirement for core network.

Disadvantage: Terminal size, cost, and current consumption.

OTT (Over the Top) VOIP (e.g. Skype)Advantage: Ready to use.

Disadvantage: Operators wont support due to business concern.

VoLGA (Voice over LTE via Generic Access)Advantage: Only requires SW enhancement to the circuit to

packet gateways and only a new VANC (VoLGA Access Network

Controller) is introduced.

Disadvantage: Not fully standardized and not a work item in

3GPP.



Voice Service with LTE (2)

SRVCC (Single Radio Voice Call Continuity)

Advantage: Provide seamless continuity of voice services in

wide geographical areas. It can also be enhanced to furtherfacilitate the handover of potential non-voice sessions that might

be active in parallel with the voice call.

Disadvantage: Requires LTE overlapping GSM/WCDMA/1xRTT

coverage.

VoLTE (Voice over LTE)Advantage: Better spectral efficiency and voice QoS guaranteed.

Disadvantage: Not ready yet. Need more effort on IMS

deployment and terminal.



Home Gateway

Machine-to-Machine

LTE Outdoor Unit

Mobility

LTE Products Application Scenario



LTE Outdoor Unit and Gateway Application

Master BedroomFamily Room

KitchenOffice Kids Bedroom

PCNAS

PCLaptop

Mobile Devices

Internet TV

WiFi +Home Gateway (w/i VoLTE)

Coax Cable

Ethernet

RJ11



LTE Machine-to-Machine

Home security and automation: window, door, motion glass, CO

smoke, lighting, air-conditioner, door locks, etc

Energy management: Smart meter, etcHealthcare: IP cams, etc

Transportation control

Selling machines

E.g. Home with M2M terminals

M2M control center

M2M App. services

Internet


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Confidential Material for Internal Use Only

Summary

4G LTE grows rapidly.

4G broadband and always on-line characteristics provides

much better user experiences than before.

Due to more bands, advanced technologies/features, and

multi-mode requirement, 4G LTE terminals are much more

complicated than before.

Voice is still a key service. Several intermediate solutions

may exist, however, VoLTE is the trend. Challenges for VoLTE

are IMS readiness and terminal complexity.

LTE will be everywhere in your daily life.


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