wireless internet_aut 2011

8/6/2019 Wireless Internet_Aut 2011

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Wireless Internet

Sojendra PradhanFaculty of Engineering and Information Technology

UTS


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Telecom Evolution


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A World without Wires


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Drivers and Enablers for this Evolution

Growth of computer-based services Internet, games, shopping etc.

Lower cost of travel and globalization

Need for fast and easy access to

information Higher productivity demand

Instant access to all informationvital

Individuality Personalization and singleinterface needs

Standards and regulations


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4G The MAGIC Technology


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2nd-> 3rd Generation Mobile Systems (3G)

2G : high bit rate voice, limited data communications and

different levels of encryption. Applications: SMS

applications. Speed: 9.6Kbits/s

2.5G: Extends 2G systems, adding features such as

packet-switched connection and enhanced data rates.

Includes EDGE (Enhanced Data GSM Environment) andGPRS. Applications: MMS, SMS mobile games, and

search and directory. Speeds: 14.4Kbits - 384Kbit/s


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3rd Generation mobile systems

3G: Wireless Wide

Area Networks (WW

ANs) are thebroadest range wireless networks. Most widely deployed

today in the cellular voice infrastructure - also have theability to transmit data. Includes UMTS (Universal MobileTelecommunications Service), EV-DO Evolution-DataO

ptimized wireless high-speed data network.Applications: Multimedia such as full-motion video, videoconferencing and Internet access. High-speed datatransmissions of 144Kbps and higher (2Mbit/s).

http://www.youtube.com/watch?v=hX0i6pXzsLE&NR=1


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4th Generation mobile systems (4G)


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4th Generation mobile systems (4G)

LTE Long Term Evolution

http://www.youtube.com/watch?v=asxYJw7wlHE&NR=1

http://www.youtube.com/watch?v=xQDGH9JzZtA

4G is expected to deliver more advanced versions of thesame improvements promised by 3G, such as enhanced

multimedia, smooth streaming video, universal access,and portability across all types of devices. 4G mightactually connect the entire globe and be operable from

any location on - or above - the surface of the earth.


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IEEE Standards Wireless Ethernet

IEEE (Institute of Electrical and Electronics Engineers)

802.11 Wireless LAN (WLAN) 802.15 Wireless Personal Area Network (WPAN) Working Group

802.16 Broadband Wireless Access (BBWA) Working Group

802.20 Mobile Wireless Access Working Group


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Ultra-Wide Band

Ultra-Wide BandWireless Personal Area Networks (WPANs) are very small

networks within a confined space, such as an office

workspace or room within the home. Ultra Wideband

(UWB) technologies, offering WPA

N users a much faster,short-distance connection, are currently under

development.

Other short-range wireless technologies: Bluetooth and

Near Field Communication (NFC)


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WiFi - 802.11 - Wireless Ethernet

Wireless Local Area Networks (WLANs) have broaderrange than WPANs, typically confined within office

buildings, restaurants, stores, homes, etc.

Designed for office-style environments

Creating a wireless network within a building

Also public Hotspots available


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WiMAX 802.16

WiMAX (802.16d - also called Wimax 2004 and

802.16e)Wireless Metropolitan Area Networks (WMANs)

cover a much greater distance than WLANs,

connecting buildings to one another over abroader geographic area.

http://www.intel.com/technology/wimax/demo/wor

ks/demo.htm

LTE vs Wimax?


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Types of Wireless Networks and the standards on which they are based(Panezic and Ritter 2005)


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Unwired 802.16 (WiMax)

Seven-owned - http://www.unwired.com.au/


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BigAir - Australia

*BigAir has chosen to migrate its iBurst customers to 3 Mobile Broadband (12/2008).

3MobileBroadband *


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Big Air

http://www.bigair.com.au/


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Wimax - Vivid wireless

http://www.vividwireless.com.au/home

http://www.vividwireless.com.au/discover-

it-now/our-technology

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Wireless Internet Characteristics

Heterogeneous access networks

WLAN, UMTS, GPRS

Richness of services and applications

Multimedia, video, games, . Context aware services (Your PDA a remote control at home,

Business applications in the office, Location Based Services)

Personalisation,

Intelligent Billing

Quality of Service (highest bandwidth possible)


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The Aim: All-IP Networks


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The Aim: All-IP Networks - Reasons for all-IP

Growth of internet creates demand

Voice can be more efficiently transported on IP, e.g. VoIP Quality is however of concern

Reduced operational cost Same network used to transport all type of data in the network

Marriage between Internet and Telecom

Reduces cost of transmitting data and increases serviceflexibility

Support of new services easier

Faster implementation of new services and transport

mechanisms


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Seamless Roaming

1. Roaming amongst: Different Network Technologies (GSM, GPRS, WLAN)

DifferentOperatorDomains (Telstra, State Transit,Vodafone, McDonalds,)

2. Without: Buying a token to get access to the network

User intervention to sign-on to the network

Interruption of Service/Session

Loss of Features (User Location, )


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What is needed for seamless roaming?

Various access technologies (GPRS, UMTS, WLAN,) Solution: Mobile IP

Roaming between multiple administrative domains Unbundle the authentication between service and network .

Needed: Network authentication and then resolve serviceprovider (via certificates)

Service offering/features remain the same Use of Mobile IP

Single sign on (authentication done at network level)


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Seamless Access

Service

A

Network A

Network B

Network C

Various access technologies

terminal/session/service mobility

Sim card authentication


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Global Objective

regional

metropolitan area

campus-based

in-car,

in-house,

personal area

Vertical Handover

(between different technologies)

Horizontal Handover

(within the same technology)

integration of heterogeneous fixed andmobile networks with varying

transmission characteristics


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Future Wireless Internet: Key Features

Improved radio technology and antennas

requires a lot of processing power

Core network convergence

IP-based, quality of service, mobile IP

Ad-hoc technologies

spontaneous communication, power saving, redundancy

Simple and open service platform

intelligence at the edge, not in the network

more service providers, not network operators only


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Potential Problems

Quality of service

Todays Internet is best-effort, Integrated services did not work out,

Differentiated service have to prove scalability and manageability

Internet protocols are well knownalso to attackers,hackers, intruders

Reliability, maintenance

Open question if Internet technology is really cheaper as soon as highreliability (99.9999%) is required plus all features are integrated

Missing charging models

Charging by technical parameters (volume, time) is not reasonable

Pay-per-application may make much more sense

Killer application? There is no single killer application! Choice of services and seamless access to networks determine the

success

wireless internet_aut 2011

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