LTE E2E Presentacion Part1

Long Term Evolution (LTE)Long Term Evolution (LTE)Long Term Evolution (LTE)Long Term Evolution (LTE)

End to End Overview End to End Overview End to End Overview End to End Overview

30th August, 2012

Award Solutions Confidential and Proprietary

30th August, 2012

Stellan Ohrn, Lauro Ortigoza

[email protected]@awardsolutions.com

Award Solutions, Inc.www.awardsolutions.com

Introduction to 3GPP


Introduction to 3GPP

Systems

R8

3GPP Roadmap

R6

R7

R9

R10

Circuit voice,

2 Mbps

packet data

Bearer-independent

circuit-switched

architecture

HSDPA,

IMS

HSUPA,

MBMS

HSPA+, Higher-order

modulation, MIMO

LTE


R99

R4

R5

LTE

Enhancements

LTE-Advanced

LTE Requirements

A. Peak data rates

1. > 100 Mbps (downlink)

2. > 50 Mbps (uplink)

B. Latency

1. < 10 ms (user plane)

2. < 100 ms (idle to active)

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C. General goals

1. Better spectral efficiency

2. Lower costs

3. Interworking with 3G and

other 4G systems

4. Seamless mobility

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4G Networks

Spectrally efficient

air interface

• OFDMA

• Multiple antenna

techniques

Distributed, IP-based

access network

• Scalable

• Reduced latency

IP-oriented, IMS-based

core network

• Scalable

• Low cost

• Rapid service deployment


Air Interface Access Network Core Network Service Network

LTE Architecture


LTE Architecture

Network Architecture Evolution3G

HLRRAN

CircuitCore

Packet

CoreIP Network

PSTN

T1 backhaul


LTE HSS

Packet

Core

RAN

IP Network

IMS

PSTN

Services

Fiber/Ethernet

backhaul

LTE Radio Network

MME

E-UTRAN

• No centralized

controller (RNC)

• eNode Bs linked

via X2 interface

E-UTRAN

eNB

S1S1S1S1----MMEMMEMMEMME


S-GW

E-UTRAN

UE eNB

X2X2X2X2

UuUuUuUu

S1S1S1S1----UUUU

EPC

EPC Architecture - I

HSSMME

• Master database

• Subscription data

• Security information

• Idle-mode mobility management

• Bearer establishment

• S-GW and P-GW selection

PCRF


EPCMME

S-GW

P-GW

ePDGOperator

Services

Wi-Fi 1xEV-DO

E-UTRAN

EPCHSS

MMEP-GW

EPC Architecture - II

Security gateway

PCRF

Policy and charging

rules function


S-GWePDG

Operator

Services

Wi-Fi 1xEV-DO

E-UTRAN

• Packet data routing

• Mobility anchor

• Idle-mode packet

buffering

• Lawful intercept

• Packet filtering

• QoS enforcement

• Default gateway

• Charging

• Lawful intercept

LTE Device Capabilities

1 NoneQPSK

16QAM 5 Mbps

QPSK

16QAM

64QAM10 Mbps

2 Up to 2x2QPSK

16QAM 25 Mbps

QPSK

16QAM

64QAM51 Mbps

Category MIMO Modulation

UL DL

Data Rates

UL DL


3 Up to 2x2QPSK

16QAM 51 Mbps

QPSK

16QAM

64QAM100 Mbps

4 Up to 2x2QPSK

16QAM 51 Mbps

QPSK

16QAM

64QAM150 Mbps

5 Up to 4x4

QPSK

16QAM

64QAM75 Mbps

QPSK

16QAM

64QAM300 Mbps

OFDM and MIMO


OFDM and MIMO

Why OFDM?

Scalable Design – Up to 20 MHz

Higher Data

Rates


Support for

Advanced

Antenna

Techniques

Rates

Reduced

Interference

Time and

Frequency

Domain

Scheduling

Simplified View of OFDM

10

Mbps

Large flow

of water

High-speed

data flow


100 kbps

100 kbps

100 kbps

100 kbps

100 kbps

OFDMA

Many small

streams

Many low-

speed data

streams

OFDM in a NutshellMulticarrier

OFDM

saved bandwidth

Guard band


• FDM transmission (number of narrow band

overlapping carriers)

• Orthogonal carriers to avoid interference

no interference

LTE Design ParametersBandwidthBandwidthBandwidthBandwidth

20 MHz

15 MHz

10 MHz

5 MHz

3

1.4

Subcarrier SpacingSubcarrier SpacingSubcarrier SpacingSubcarrier Spacing

15 kHz

AntennasAntennasAntennasAntennas

Up to 4x4 MIMO

Frame TimingFrame TimingFrame TimingFrame Timing Cyclic PrefixCyclic PrefixCyclic PrefixCyclic Prefix5.2 or 4.69 µs

DuplexingDuplexingDuplexingDuplexing

FDD


n-1 n n+1

10 ms

CP Symbol

CP Symbol

16.67 µs

NormalNormalNormalNormal

ExtendedExtendedExtendedExtended

66.67 µs

H-FDD

TDD

CodingCodingCodingCoding

Convolutional Turbo

0101

000111000111

0101

100110001011

ModulationModulationModulationModulation

QPSK 16-QAM 64-QAM

Multiple AccessMultiple AccessMultiple AccessMultiple Access

OFDMA

SC-FDMA

Multiple Antennas in LTE

TypeTypeTypeType How How How How BenefitsBenefitsBenefitsBenefits

Transmit DiversityIdentical streams to the

same user

Better coverage and/or

quality under

challenging radio

conditions

Spatial Multiplexing


Spatial Multiplexing

(Single User-MIMO)Multiple streams to the

same user

Higher throughput for

receivers in good

conditions

Multi-User-MIMO

Different streams to

different users

Greater cell capacity

Type 1 Frame Structure (FDD & H-FDD)

Frame n-1 Frame n Frame n+1

SF 1 SF 2 SF 3 SF 10

TSF= 1 ms

TF =10 ms


SF 1 SF 2 SF 3 SF 10

Ts0 Ts1 Ts2 Ts3 Ts4 Ts5 Ts18 Ts19

TSLOT= 0.5ms • Resource allocation done per sub-frame

• Slots are used in cell synchronization

• Frames used in SIB scheduling

Downlink Transmission Parameters

Transmission BW 1.4MHz 3MHz 5MHz 10MHz 15MHz 20MHz

Sub-frame duration 1 ms

Sub-carrier spacing 15 kHz

Sampling frequency 1.92 MHz 3.84 MHz7.68 15.36 23.04 30.72


Sampling frequency 1.92 MHz 3.84 MHz7.68

MHz

15.36

MHz

23.04

MHz

30.72

MHz

FFT size 128 256 512 1024 1536 2048

Number of occupied

sub-carriers with DC76 151 301 601 901 1301

Resource Blocks6 12 25 50 75 100

Number of OFDM

symbols per slot

(Normal or Extended CP)7 or 6

Services in LTE


Services in LTE

EPS Bearer Service Architecture

UE eNB S-GW P-GW Peer

Entity

E-UTRAN EPC Internet

End-to-End Service

EPS Bearer External Bearer


EPS Bearer External Bearer

E-RAB S5/S8

BearerRadio Bearer S1 Bearer

Radio S1 S5/S8 G1

QoS Classes in EPS

QCIQCIQCIQCIBearerBearerBearerBearer

TypeTypeTypeTypePriorityPriorityPriorityPriority Application ExampleApplication ExampleApplication ExampleApplication Example

1111

GBR

2 Conversational voice

2222 4 Conversational video (live streaming)

3333 3 Real-time gaming

Non-conversational video (buffered


4444 5Non-conversational video (buffered

streaming)

5555

Non-GBR

1 IMS signaling

6666 6Video (buffered streaming), TCP apps (web,

email, FTP), premium service

7777 7 Voice, video, interactive games

8888 8 Video (buffered streaming), TCP apps (web,

email, FTP,) non-premium service9999 9

REF: 3GPP TS 23.203

EPS Bearers


EPS Bearers

IMS

EPS Bearers

Default EPS Bearer

Dedicated EPS Bearer P-GW 1

Best effort, “always on”

connection


Internet

UE

Dedicated EPS Bearer

Default EPS Bearer

P-GW 1

P-GW 2

QoS requirements based

on service request

UE can have connections

to multiple PDNs

Service Data Flows

IMS

IMS Signaling (Default)

VoIP Traffic (Dedicated) P-GW 1

SDFs with different QoS

requirements are carried in

separate EPS bearers

An SDF represents one

end-to-end packet flow


Intern

et

UE

VoIP Traffic (Dedicated) P-GW 1

Email (Default)

Web browsing (Default)

P-GW 2

SDFs with the same QoS

characteristics can be aggregated

Signaling Bearers

Established during RRC

Connection set upEstablished during

initial Network Attach


eNBUE MME S-GW P-GW

RRC S1-MME S11 S5/S8

Established during

initial Network Attach

Established for every

PDN connection

Documents

LTE E2E Presentacion Part1