N AME OF THE T OPIC : Prepared by: Sayed Mahfuz Mahmud Istiyak Ahmed M.Sc. Engr.(CSE), Summer 2011 ID No: 012112022 Department of CSE United International.

NAME OF THE TOPIC:

Prepared by:

Sayed Mahfuz Mahmud Istiyak Ahmed

M.Sc. Engr.(CSE), Summer 2011

ID No: 012112022

Department of CSE

United International University

Presentation Date: 21-08-2011

LTE-Simplifying the Mobile CommunicationCSE 6065 - Advanced Mobile Communications

LTE needed for higher data rates

Motivation

LTE needed for cheaper infrastructure- cost savings

LTE needed for high quality of services(QoS)

LTE needed for capacity crunch

LTE needed for PS optimized system

LTE needed for competitive reasons

Reasonable terminal power consuming

M.Sc. Engr.(CSE), Summer 2011, ID No: 012112022, United International University

Work Plan

Kick-off in Advance Mobile Communication Class at UIU on 21-05-2011

Study Item:Introduction to Wireless and Mobile Systems.Issues and Challenges of Next Generation Mobile Communications.Comparison of technology.Detailed start of standard work: - 01, Aug 2011First deployed – 14, Aug 2011


Provides the basic description , overview of the 3GPP Release 8 Long Term Evolution (LTE) network architecture with the used technologies which Simplifying the Migration to 4G Networks.

Necessity of LTE and the scenarios.

Objectives


LTE – Introduction LTE Overview LTE – key facts LTE – background LTE specification overview 3GPP LTE technologies

OFDM MIMO LTE- SAE Atchitecture FDD and TDD

LTE Performance LTE Terminals Scenarios SUMMARY

Table of Contents


As Internet generation accustomed to access broadband wherever they go, mobile broadband, instead of only at home and in the office, has become a reality.

Therefore, the Global System for Mobile Communications family constantly develops new mobile technologies to achieve better performance, such as higher speed, larger capacity and so forth.

LTE is a step beyond 3G and towards the 4G, evolved after EDGE, UMTS, HSPA and HSPA Evolution.

The contributions of LTE make sure that the users are able to request more mobile applications like interactive TV, mobile video blogging, advanced games or professional services.

Introduction


Long Term Evolution (LTE) is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) which was introduced in 3rd Generation Partnership Project (3GPP) Release 8, operating under a name trademarked by one of the associations within the partnership, the European Telecommunications Standards Institute.

Long Term Evolution (LTE) is wireless network technology based on OFDM, MIMO, multiple antenna techniques and all-IP

technologies. It provides much higher data rates (over 100 Mbps) to users while reducing cost-per-bit for

wireless service providers. In addition to LTE, the 3GPP and 3GPP2 is also defining an IP-based, flat network SAE

architecture. The architecture is based on an evolution of the existing GSM/WCDMA core network, with simplified operations and smooth, cost-efficient deployment.

LTE Overview


http://en.wikipedia.org/wiki/UMTS

http://en.wikipedia.org/wiki/3GPP

http://en.wikipedia.org/wiki/European_Telecommunications_Standards_Institute

LTE – Key Facts

Broadband subscriptions are expected to reach 3.4 billion by 2014 and about 80 percent of these consumers will use mobile broadband (see Figure 1 & Figure 2). and the majority will be served by HSPA and LTE networks.

User-generated content is particularly interesting, because it changes traffic patterns, making the ability to uplink more important than ever.

The high peak rates and short latency of LTE also enable real-time applications such as gaming, interactive TV, mobile video blogging, professional services and video-conferencing.

Meet Consumer Requirements:


Meet Operator Requirements:

Studies of Western Europe show extremely higher data volumes in 2020, which are illustrated in Figure.

LTE – Key Facts

“Mobile technology has shown us the power and potential of always-on, everyplace network connectivity and new business models with new opportunities ”

Providing the powerful foundation of networking technologies is the GSM family – EDGE, HSPA and, in the near future, LTE – which are leading innovations and leading innovations and realization of global mobile broadband.

To be realized, the NGMN's vision of technology evolution beyond 3G requires meet the 3GPP original LTE requirements:

new opportunities


Increased peak data rates: 100Mbp downlink and 50Mbps uplink. Reduction of RAN latency to 10ms. Improved spectrum efficiency (two to four times compared with HSPA Release 6). Cost-effective migration from Release 6 Universal Terrestrial Radio Access (UTRA) radio interface and architecture. Improved broadcasting. IP-optimized (focus on services in the packet- switched domain). Scalable bandwidth of 20MHz, 15MHz, 10MHz, 5MHz, 3MHz and 1.4MHz. Support for both paired and unpaired spectrum. Support for inter-working with existing 3G systems and non-3GPP specified

systems.

Summary of the 3GPP original LTE requirements


The starting point for LTE standardization was the 3GPP RAN Evolution Workshop, held in November 2004 in Toronto, Canada.

LTE performance has been evaluated and the results were agreed on in a 3GPP meeting in South Korea in mid-2007.

The specification work on LTE was completed in March 2009 as the SAE specifications were included and will guarantee backwards compatibility.

LTE Background


Parameter DetailsPeak downlink speed 64QAM (Mbps) 100 (SISO), 172 (2x2 MIMO), 326 (4x4 MIMO)Peak uplink speeds (Mbps) 50 (QPSK), 57 (16QAM), 86 (64QAM)Data type All packet switched data (voice and data). No

circuit switched.Channel bandwidths(MHz) 1.4, 3, 5, 10, 15, 20Duplex schemes FDD and TDDMobility 0 - 15 km/h (optimized),

15 - 120 km/h (high performance)Latency Idle to active less than 100ms

Small packets ~10 msSpectral efficiency Downlink: 3 - 4 times Rel 6 HSDPA

Uplink: 2 -3 x Rel 6 HSUPAAccess schemes OFDMA (Downlink)

SC-FDMA (Uplink)Modulation types supported QPSK, 16QAM, 64QAM (Uplink and

downlink)

LTE Specification


LTE has introduced a number of new technologies when compared to the previous cellular systems. They enable LTE to be able to operate more efficiently with respect to the use of spectrum, and also to provide the much higher data rates that are being required.

OFDM (Orthogonal Frequency Division Multiplex). MIMO (Multiple Input Multiple Output). SAE (System Architecture Evolution). FDD and TDD.

3GPP LTE Technologies


OFDM technology enables high data bandwidths to be transmitted efficiently with reflections and interference.

The access schemes differ between the uplink and downlink: OFDMA (Orthogonal Frequency Division Multiple Access is used in the downlink SC-FDMA (Single Carrier - Frequency Division Multiple Access) is used in the uplink

Figure 6 shows the LTE downlink physical resource based on OFDM.

OFDM


By using multiple antennas at the transmitter and receiver along with some complex digital signal processing, MIMO technology enables the system to set up multiple data streams on the same channel, thereby increasing the data capacity of a channel.For example, high peak data rates can be achieved with multi-layer antenna solutions such as 2x2 or 4x4 multiple input, multiple output (MIMO), and extended coverage can be achieved with beam-forming. Figure 7 shows the MIMO principles with 2x2 antennas at the base station.

MIMO


To enable the improved performance to be achieved Latency times can be reduced Data can be routed more directly to its destination CDMA operators will be able to evolve their networks to LTE–SAE

LTE-SAE Architecture


FDD and TDD

Frequency bands for frequency division duplexing (FDD) and time division duplexing (TDD) LTE can be used in both paired (FDD) and unpaired (TDD) spectrum with duplex schemes. In general, FDD is more efficient and represents higher device and infrastructure volumes, but TDD is a good complement, for example, in spectrum center gaps.


3GPP bands for LTE FDD & TDD

Driving forces for LTE/SAE


Performance Higher peak rates Higher bandwidth Low delay/latency

Cost efficiency� Low cost per bit Low OPEX & CAPEX Simpler operation Cost-effective migration

Spectrum flexibility� New and existing bands Flexible bandwidth Duplex flexibility: FDD and TDD

High data rates Downlink: >100 Mbps Uplink: >50 Mbps Cell-edge data rates 2-3 x HSPA Rel. 6

Low delay/latency� User plane RTT: <10 ms Channel set-up: <100 ms

High spectral efficiency� Targeting 3 x HSPA Rel. 6�High Performance Broadcast services

Cost-effective migration�

Terminals

Figure 10: Examples of devices that could use LTE


Scenario : Rollout of a full service LTE network over a legacy GSM/UMTS/HSPA network with voice support remaining on the legacy network.

In this scenario, the operator intends to roll out LTE as a full voice and data service offering.

Scenario


Whatever the name – next generation LTE, LTE-Advanced or LTE Rel-10 – the next step in LTE evolution allows operators to introduce new technologies without putting existing investments

at risk for the power and potential of always-on, everyplace network connectivity


Question ?


Thank You.


N AME OF THE T OPIC : Prepared by: Sayed Mahfuz Mahmud Istiyak Ahmed M.Sc. Engr.(CSE), Summer 2011 ID No: 012112022 Department of CSE United International.

Documents

system lte

contributions of lte

necessity of lte

capacity crunch lte

mobile broadband

mobile applications

mobile systems

new mobile technologies