Lte long term evolution

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Long Term Evolution (LTE) - A Tutorial
Ahmed Hamza aah10@cs.sfu.ca
Network Systems Laboratory Simon Fraser University

October 13, 2009

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

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Outline
1 2 3 4 5 6 7

Introduction LTE Architecture LTE Radio Interface Multimedia Broadcast/Multicast Service LTE Deployment Considerations Work Related to VideoStreaming Conclusions

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

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Introduction

Outline
1 2 3 4 5 6 7

Introduction LTE Architecture LTE Radio Interface Multimedia Broadcast/Multicast Service LTE Deployment Considerations Work Related to Video Streaming Conclusions

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

3 /48

Introduction

Introduction

In November 2004 3GPP began a project to define the long-term evolution of UMTS cellular technology. Related pecifications are formally known as the evolved UMTS terrestrial radio access (E-UTRA) and evolved UMTS terrestrial radio access network (E-UTRAN). First version is documented in Release 8 of the 3GPP specifications. Commercial deployment not expectedbefore 2010, but there are currently many field trials.

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

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Introduction

LTE Development Timeline

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

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Introduction

Next Generation Mobile Network (NGMN) Alliance

19 worldwide leading mobile operators

Ahmed HamzaLong Term Evolution (LTE) - A Tutorial

October 13, 2009

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Introduction

LTE Targets
Higher performance
100 Mbit/s peak downlink, 50 Mbit/s peak uplink
1G for LTE Advanced Faster cell edge performance Reduced latency (to 10 ms) for better user experience Scalable bandwidth up to 20 MHz

Backwards compatible
Works with GSM/EDGE/UMTS systems Utilizes existing 2G and 3G spectrumand new spectrum Supports hand-over and roaming to existing mobile networks

Reduced capex/opex via simple architecture
reuse of existing sites and multi-vendor sourcing

Wide application
TDD (unpaired) and FDD (paired) spectrum modes Mobility up to 350kph Large range of terminals (phones and PCs to cameras)
Ahmed Hamza Long Term Evolution (LTE) - A Tutorial October 13, 2009 7 / 48

LTEArchitecture

Outline
1 2 3 4 5 6 7

Introduction LTE Architecture LTE Radio Interface Multimedia Broadcast/Multicast Service LTE Deployment Considerations Work Related to Video Streaming Conclusions

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

8 / 48

LTE Architecture

LTE Architecture
LTE encompasses the evolution of:
the radio access through theE-UTRAN the non-radio aspects under the term System Architecture Evolution (SAE)

Entire system composed of both LTE and SAE is called the Evolved Packet System (EPS) At a high-level, the network is comprised of:
Core Network (CN), called Evolved Packet Core (EPC) in SAE access network (E-UTRAN)

A bearer is an IP packet flow with a defined QoS between the gateway and the User Terminal (UE) CN isresponsible for overall control of UE and establishment of the bearers
Ahmed Hamza Long Term Evolution (LTE) - A Tutorial October 13, 2009 9 / 48

LTE Architecture

LTE Architecture

Ahmed Hamza

Long Term Evolution (LTE) - A Tutorial

October 13, 2009

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LTE Architecture

LTE Architecture
Main logical nodes in EPC are:
PDN Gateway (P-GW) Serving Gateway (S-GW) MobilityManagement Entity (MME)

EPC also includes other nodes and functions, such:
Home Subscriber Server (HSS) Policy Control and Charging Rules Function (PCRF)

EPS only provides a bearer path of a certain QoS, control of multimedia applications is provided by the IP Multimedia Subsystem (IMS), which considered outside of EPS E-UTRAN solely contains the evolved base stations, called eNodeB or...
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