LTE WiMAX Evolution to 4G

(c) 2008 Comsys Communication & Signal Processing Ltd.

LTE & WiMAX Evolution to 4GLTE & WiMAX Evolution to 4G

Israel Mobile Association Event

LTE vs. WiMAX: Complementing or Competing?

29 October 2008

Ehud Reshef, WiMAX Product Marketing Director

(c) 2008 Comsys Communication & Signal Processing Ltd.1

About Comsys

� Cellular baseband fabless company

� Field-proven solutions – over 30 million handsets use Comsys 2G/3G technologies

� Focused on 4G

� Unique Mobile-WiMAX / cellular chip

� Advanced multimode and multi-RAT co-existence techniques

� Developing 3GPP-LTE device

Over 30 million handsets enabled by Comsys cellular technology


Comsys Solutions

Mobile WiMAX, LTE Silicon / System

ComMAX™

EDGEware™

2G/3G System IP UEware™ EGGware™

2.5G PHY IP

200620042002 20082000 2010

IPS

ilicon


Managed network

OoS guarantee

Full mobility

Easy worldwide roaming

Mobile Broadband

All-IP network

Always on

Multiple deviceform factors

Internet connectivity

“4G”


Access Technologies Positioning


LTEAdvanced

802.16mR 2.0

Mobile Broadband Technology Evolution

WCDMA

3GPPHSDPA HSPA

Mobile

WiMAX802.16eR 1.0

EVDORev A

EVDORev B

CDMA 2000

3GPP2

LTE

802.16eR 1.5

2005 2009 20102006 2007 2008 2011 2012

CDMA based OFDMA based

R99

“4G”

IMT-Advanced


So What is “4G”?

� Still need to be defined by ITU – “IMT-Advanced”

� Expected targets

� True Mobile Broadband

� 1Gbps peak data rate for fixed services

� 100Mbps data rate for mobile services

� High mobility to 500Km/H

� Flat All-IP network architecture

� Specific Technologies and Spectrum allocations not identified

� WiMAX and 3GPP-LTE are not 4G technologies

� WiMAX TDD is part of the IMT-2000 family of standards

� 3GPP LTE expected to become part of IMT-2000


Technical Comparison Overview

Aspect LTE (3GPP R8) WiMAX R 1.0 (16e) WiMAX R 2.0 (16m)

Air Interface DL: OFDMA

UL: SC-FDMA

DL: OFDMA

UL: OFDMA

DL: OFDMA

UL: OFDMA

Duplexing FDD, TDD TDD TDD, FDD

Mobility /

Vehicular Speed

350 Km/H 60-120 Km/H 350 Km/H

Bandwidth 1.25, 1.6, 2.5, 5, 10, 15, 20

MHz

3.5, 5, 7, 8.75, 10 MHz 5, 10, 20, 40 MHz

Peak Data Rates DL: 302 Mbps (4x4)

UL: 75 Mbps (2x4)

@ 20 MHz FDD

DL: 46Mbps (2x2)

UL: 4Mbps (1x2)

@ 10MHz TDD 3:1

DL > 350 Mbps (4x4)

UL > 200 Mbps (2x4)

@ 20 MHz FDD

Average Sector Spectral Efficiency

DL: 1.91 bps/Hz (2x2)

UL: 0.72 bps/Hz (1x2)

DL: 1.91 bps/Hz (2x2)

UL: 0.84 bps/Hz (1x2)

DL > 2.6bps/Hz (4x2)

UL > 1.3bps/Hz (2x4)

Latency Link layer < 5 mSec

Handoff < 50 mSec

Link layer ~ 20 mSec

Handoff 35-50 mSec

Link layer < 10 mSec

Handoff < 30 mSec

VoIP Capacity 80 users / sector / FDD MHz 20 users / sector / TDD

MHz

> 30 users / sector / TDD MHz


Other Interesting Aspects

Multiple formats – PUSC, FUSC, AMCContiguous allocation blocksAllocation Schemes

FCH: CC, K=7, R=½

Control+Data: CTC, K=4, R=2/6, 480 bits/block

Control: CC, K=7, R=1/3Data: CTC, K=4, R=1/3, 6144 bits/block

Forward Error Correction

Aspect 3GPP – LTE Mobile WiMAX

Air Interface OFDMA based

QPSK – 64QAM

OFDMA based

QPSK – 64QAM

Core Network All-IP All-IP

Persistent Allocations Release 8.0 Release 1.5

Multicast/Broadcast Release 9.0 Release 1.0

UL PAPR Reduction SC-FDMA N/A

H-ARQ Incremental Redundancy Release 1.0 – Chase

Release 1.5 – Chase or IR

MIMO Models Spatial Multiplexing

Transmit Diversity (Alamouti, CDD)

UE specific beam-forming

Spatial Multiplexing

Transmit Diversity (Alamouti)

CDD – R 1.5

UE specific beam-forming

Collaborative UL SM

Multi Technology Support GERAN, UTRAN, non-3GPP

Non 3GPP: CDMA, WLAN, (WiMAX)

PMIP and IMS/VCC

CDMA, GERAN, UTRAN, WLAN

CMIP, PMIP, IMS


vNSPNAP hNSP

WiMAX Network Architecture

R1

R3

R6

R2

Internet

R5

CSN CSN

ASNASN

GW

BS

BS

MS

AAA Proxy

HAPF

AAA

PF

R3R4

R6

R6

ASNASN

GW

BS

BS

R6


Simplified 3GPP LTE Network Architecture

Internet

UE

eNB

eNB

Serving

GW

MME

SAE

AnchorLTE-Uu S1-u

S1-c

S1-u

S1-c

S5

S11

SGi

PDN

GW

X2


IMS

Core

Converged Network Architecture

R6

ASNASN

GW

BS

BS

R6

CSN

eNB

eNB

Serving

GW

MME

S1-u

S1-MME

S1-u

S1-MME

S11X2

SAE

Anchor

3GPP

Anchor

S5-b

GPRS

Core

S5

S5-a

S3

S4

GERAN

UTRAN

Gb

Iu

HSS

PCRF

InternetR3

PDNGW

S7

S6-a

SGSN

GSM/EDGE

UMTS

LTE

WiMAX


IMS Framework

IMS Centric Network Architecture

SIPApplication Server

Home SubscriberServer (HSS)

Call Session Control Function (CSCF)(SIP Proxy)

UMTS Packet Core Network

WiMAX WLAN DSL/Cable

Media Resource Function Control

Media Resource Gateway Control

Multiple Possible Access Networks

Diameter

SIP


IMS Centric Device Architecture

IMS Applications

IMS Service Enablers

IMS Enabling Protocol Layer

IMS Socket API

TCP/IP

VoIP, VCC IM

Video

PresenceMultimedia

Gaming

Multi-Standard Baseband

RFIC RFIC RFIC

Non-IMS Applications


Example Reference Platform

Smartphone evaluation platform

Multi-RF support, including WiMAX/WLAN/EDGE

Mobile IP and IMS/VCC for service continuity


Managed network

OoS guarantee

Full mobility

Easy worldwide roaming

Mobile Broadband

All-IP network

Always on

Multiple deviceform factors

Internet connectivity

“4G”

• LTE and WiMAX Mobile have strong commonalities in technology

• Containing many technologies that we will see with “4G” systems

• Specific differences relate to mobile vs. broadband origins

Conclusion


www.comsysmobile.com

WiMAX: [email protected]

LTE: [email protected]

LTE WiMAX Evolution to 4G

Documents