4g Power Point

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UNDER THE MAIN THEME OF MOBILE COMPUTING

PRESENTED BY u.

V.CHIDVILASH

07G61A0513C.S.E



First Generation Cellular Communication (1G)

Second Generation Cellular Communication (2G)

Third Generation Cellular Communication (3G)

fourth Generation Cellular Communication (4G)

́A technology that allows transmission of data, via a computer,

without having to be connected to a fixed physical link«µ

EVALUATION AND INTRODUCTION



4G WIRELESS STANDARD

WiMAX: There are two mainapplications of WiMAX

Fixed WiMAX (IEEE 802.16 -

2004): Fixed WiMAX

applications are point-

to-multipoint enabling

the delivery of last mile

wireless broadbandaccess as an alternative

to cable and DSL for

homes and businesses.



4G WIRELESS STANDARD

Mobile WiMAX (IEEE 802.16e-2005) - Mobile WiMAX

offers the full mobility of cellular networks at true

broadband speeds



IP V 6 SUPPORT

IPv6 support large number of wireless enabled devices.

By increasing the number of IP addresses, IPv6 removes

the need for NAT (Network Address Translation).

IPv6 support large number of wireless enabled devices.

IPv6:-- 4 × IPv4 (128 bits)

example:

216.37.129.9 , 79.23.178.229 , 65.198.2.10 , 192.168.5.120

home

address

care-of

address

mobile IP

address

local network

address



H AP

S

Services

Content

GSM

UMT

S

WLA

N

Bluetooth

Satellite

Wireline or

Wireless

Networks

(Internet)

Very wide

area Wide area

Metropolitan

areaLocal area

Personal

area

Direct Sequence

Frequency

Hopping

WCDMA

TD-

CDMA

TDMA

FDD

OFDM

TDDOFDM

Unspecifie

d

ADSL

THE 4G MOBILE NETWORK (S)

Home Add.

Mobile IP Add.

Care-of Add.

Care-of Add.



CHALLENGES OF 4G

First Challenge: Accessing Different

Networks:

1. Multimode devices

Advantages:

y Improve call completion

y Expand coverage area

Reliable coverage in case

of network, link or switch

failure



2. Overlay network: In this

architecture, a user accesses an

overlay network consisting of

several universal access points.UAPs Functions:

y Select a wireless network

based on availability and user

choices

y Store IPs of user, network anddevices

Advantages:

y Simplify hardware of device

y Supports single billing



Second Challenge: Terminal Mobility

In order to provide wireless services at any time and

anywhere, terminal mobility is a must in 4G infrastructure.

There are two main issues in terminal mobility:

1. Location Management: The system tracks and locates a

mobile terminal for possible connection. Location managementinvolves handing all the information about

y Roaming terminals such as original and current location cells

y Authentication information

y QoS capabilities.



2.Handoff Management

Horizontal

handoff is performedwhen the terminal

moves from one cell to

another within the

same wireless system.

Vertical handoff is

performed when the

terminal moves between

two different wireless

systems (e.g., from

WLAN to GSM) .



4G MOBILE TECHNOLOGIES

1. Open Wireless Architecture (OWA):A single system architecture

characterized by a horizontal communication model providing common

platform to complement different access technologies in an optimum way for

different service requirements and radio environments is called the

converged broadband wireless platform or open wireless architecture

(OWA).

The open wireless platform requires:

Area and power-efficient broadband signal processing for wideband

wireless applications

Highest industry channel density (MOPS pooling) in flexible new

BTS signal processing architectures

BTS solutions scalable to higher clock rates and higher network

capacity



MIMO(MULTIPLE-INPUT-MULTIPLE-

OUTPUT)Increasing demand for high

performance 4G broadband

wireless mobile calls for use of

multiple antennas at both base

station and subscriber ends.

Advantages: Spatial diversity and

coding gains for large link budget

gains (>10 dB).



2.SPECTRUM-EFFICIENT HIGH-SPEED

WIRELESS MOBILE TRANSMISSION

The spectral efficiency of a radio system the quantity of billable services

that can be delivered in a unit of spectrum directly impacts network

economics and service quality. Spectrally efficient systems have the

following characteristics:

Reduced spectrum requirements, minimizing up-front capital expenses

related to spectrum

Reduced infrastructure requirements, minimizing capital and operating

costs associated with base station sites, translating into reduced costs per

subscriber and per covered population element



4G FEATURES

H

igh usability: anytime, anywhere, and with any technology. 4G networks areall-IP based heterogeneous networks that allow users to use any system at any

time and anywhere.

Support for multimedia services at low transmission cost.

Personalization, integrated services

Entirely packet switched networks.

All network elements are digital.

Higher bandwidth, tight network security.

Coping with the expected growth in Internet

Opening new spectrum frontiers

4G networks expected to support real-time multimedia services that are highly

time-sensitive .



CONCLUSION

Low cost high speed data will drive forward the fourth

generation (4G) as short-range communication emerges. Service and

application ubiquity, with a high degree of personalization and

synchronization between various user appliances, will be another driver. It

is probable that the radio access network will evolve from a centralized

architecture to a distributed one. 4G is likely to enable the download of full

length songs or music pieces which may change the market response

dramatically.

4g Power Point

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