introduccion a lte v1

8/13/2019 Introduccion a LTE v1

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Redes LTE

Long Term Evolution

Ing. Edgar Velarde

[email protected]

blog.pucp.edu.pe/telecom


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LTE es una tecnologa flexible

326Mbps

10ms RTT

LTE is a flexible access technology answering marketexpectations and solving operators challenges

CDMA, GSM, W-CDMA, WiMAX

20MHz

1.4MHz

2.6GHz

700MHz

Excellentperformance for

outstanding Qualityof Experience

Wide spectrum andbandwidth range

cost e ffective IParchitecture and

transport

Smooth interactionwith legacy

LTE

2G/3G


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A common evolution path

Long Term Evolution (LTE) isthe next generation broadband

wireless technology for 3GPP

and 3GPP2 networks

Tecnologas pilares de LTE

OFDMA

MIMO

Flat IP

Robust modulation in denseenvironments

OFDMA (DL) / SC-FDMA (UL) Increased spectral

efficiency. Simplified Rx design. Cheaper UEScalable -go beyond 5 MHz lim itation

A taste of 4G based on highly efficient technologies

Enabling new applications,lowering cost

Peer to peer applications

requiring high throughput

Online gaming

Flat fee trend

Increased link capacity

Multiple-input, multiple-output UL& DL.Collaborative MIMO (UL). Overcome multi-path

interference

Flat, scalable

Short TTI: 1 ms (2 ms for HSPA).Backhaul based on IP / MPLS transport.

Fits with IMS, VoIP, SIP

* Orthogonal Frequency Division Multiple Access


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Tasa de bits y latencia en LTE

Higher Peak throughput (Mbps)

Latency Reduction

HSPA

(5MHz)

HSPA+

(5MHz)

LTE MIMO 2x2

(20MHz)

HSPA HSPA+ WiMAX

50 ms

65 ms

50 ms

173

55

42DL11

UL14DL

5UL

LTE MIMO 4x4

(20MHz)

326

86

LTE

10 ms

WiMAX

(10MHz)

36DL

9UL

User createdcontent

Multi-screen

Gaming

Low latency enables fast channel

adaptation therefore allowing high

speed applications

More

High peak throughput enables rich

content applications over LTE

HD TV

UL

UL

DL

DL


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Red de acceso y core LTE

IP extremo a extremo

LTE

2G/3Gcontroller


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Evolucin de la arquitectura LTE

RNC

Radio

intelligence

moving toeNodeB

1 2 4

Node B

Multimedia

Services

SGSN

Backhaul (TDM/ATM)

RNC bearer

mobility

evolves tothe SGW

3

Backhaul

transitionto IP/Ethernet

Backhaul (IP/Ethernet)

MCS voice and

SGSN

packet mobility

evolves into

the SGWRNC control

distributed into

the MME/eNB SGSN control

evolves into

the MME

CS Core

5

CS and PS

evolve into aunified all-IP

domain

Service and mobile awareall-IP network

MME

PCRF

PDN GW

SGW

eNodeB

PS Core

GGSN

Best effort

evolves to

E2E QoS

6 7

Internet

TODAY

LTE


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Interfases de la arquitectura LTE

LTE-Uu

LTE-Uu

X2

X2

X2

S1-MME

S1-MMES1-MME

S1-U

S1-U

S1-U

UE

UE

eNodeB

eNodeBeNodeB

IP Transport Network (IP Cloud)

S1-U: S1 U-planeS1-MME: S1 C-planeAP - Access Point (for IP cloud)

EUTRAN EPC

AP

AP

AP AP

AP

S11

PDN

Gateway

S5 SGi

MME Mobility Management EntityPCRF Policy Charging Rules FunctionPDN Packet Data Network

S-GW - Serving GatewayP-GW - PDN Gateway

MME

SGW PDN GW

PCRF

AP

S7c Gx


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Categoras de UE para LTE


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VoLTE

Voice over LTE


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Por qu implementar VoLTE?

A pesar de la reduccin del ingreso de voz, an es significativo


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Situaciones que afectan la eleccin y elmomento del despliegue de VoLTE


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Opciones de servicios de voz para lossmartphones LTE

Uso de tecnologas de CS (Circuit Switch) Simultaneous Voice and LTE (SVLTE)

Circuit Switched Fall Back (CSFB)

Despliegue de IP Multimedia Sub-system (IMS) Single Radio Voice Call Continuity (SRVCC)


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Simultaneous Voice and LTE (SVLTE)

Para el caso de un overlay de LTE en una red CDMA El servicio de voz se da en la red CDMA en paralelo con

el servicios de datos en la red LTE

Se necesitan dispositivos de usuario dual-mode

No se necesita ninguna funcin adicional en la red

Los dispositivos dual-mode pueden manejar en

simultneo sesiones de datos LTE y llamadas de voz


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Circuit Switched Fall Back (CSFB)


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Single Radio Voice Call Continuity (SRVCC)


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VoLTE usando IMS

IMS es el corazn de la solucin para VoLTE Los servidores Telephony Application Server (TAS) de la

red IMS gestionan los servicios de voz y servicios

suplementarios (call forward, call waiting, call transfer)

Se pueden implementar servicios multimedia llamados

Rich Communications Service (RCS)

Estos servicios pueden ser de privacidad, buddy lists,

presencia, video share, video llamada, chat, mensajeramultimedia, transferencia de archivos y otros


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LTE-Advanced


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LTE- AdvancedA partir del 3GPP Release 10


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introduccion a lte v1

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