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Mobile Computing and Wireless Communications – Short Tutorial and R&D Trends . Amjad Umar website: www.amjadumar.com . Objective: Share Experience based on Industrial involvement and industrial research university teaching . Outline. Framework for Discussion

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Mobile computing and wireless communications short tutorial and r d trends l.jpg

Mobile Computing and Wireless Communications – Short Tutorial and R&D Trends

Amjad Umar

website: www.amjadumar.com

Objective: Share Experience based on

Industrial involvement and industrial research

university teaching

Copyrights: Amjad Umar


Outline l.jpg

Outline

  • Framework for Discussion

  • Mobile Applications (M-Business, M-Business, M-Government, M-Life, Positional Apps)

  • Platforms to Support Mobile Applications

    • Mobile IP

    • Wireless middleware (WAP, iMode, J2ME, BREW, MMIT)

  • Wireless Networks

    • Wireless PANs (Sensor Networks, Bluetooth, UWB)

    • Wireless LANs (Wi-Fi, 802.11a to n)

    • Wireless Local Loops and Free Space Optics

    • Cellular networks: from 1 to 5G Networks

    • Satellite communications and Deep Space Networking

  • Security, Integration, and Management Issues

  • University Course Outline

Copyrights: Amjad Umar


Slide3 l.jpg

The Jargon

  • State of the art

  • State of the market

  • State of the practice

Copyrights: Amjad Umar


Framework for discussion the building blocks l.jpg

Framework for Discussion: The Building Blocks

Research and development

in every building block

Copyrights: Amjad Umar


Mobile computing applications l.jpg

Mobile Computing Applications

  • Enable the business initiatives by supporting mobility of

    • Customers

    • Suppliers and Businesses

    • Employees

  • Mobile computing applications

    • Wireless messaging (e.g., SMS)

    • Mobile ecommerce (M-Commerce) and its variants

      • Positional commerce (p-commerce) .

      • Voice commerce (v-commerce).

      • Television commerce (T-Commerce)

    • Mobile ebusiness applications (MEBAs), e.g., M-CRM, M-portal, N-SCM

    • Specialized applications – Many areas of research

      • Location sensitive apps (E911)

      • Wireless sensor network apps

      • Mobile agent apps

  • Two views:

    • Mobile applications are fundamentally new applications.

    • Mobility is another dimension of the existing applications

  • Research in every aspect

Copyrights: Amjad Umar


Supporting m apps mobile computing platforms l.jpg

Supporting M-Apps: Mobile Computing Platforms

Copyrights: Amjad Umar


Mobile computing platforms l.jpg

Mobile Computing Platforms

  • Mobile operating systems

    • - Palm OS

    • -Windows CE

    • - Symbian OS

  • Mobile database managers

  • Mobile transaction managers

  • Utilities for mobile devices

  • Wireless Middleware (information hiding versus

  • Information providing)

  • Wireless Gateways: Collection of Middleware services

  • Mobile Application Servers

  • Research and development in every aspect

Copyrights: Amjad Umar


Wireless web l.jpg

Wireless Web

WAP

Gateway

WML

Content

(XML/HTML)

Web

Server

Servelet

VoiceXML

Gateway

VoiceXML

HTML/XML

eCommerce

Module

  • Many players

  • - WAP

  • iMode

  • J2ME

  • BREW

  • MMIT

Industry activity

- Open Mobility Alliance

Copyrights: Amjad Umar


Mobile ip the roaming in wireless internet world l.jpg

Mobile IP – The Roaming in Wireless Internet World

Mobile Node A

NSP POP

Home Network

for A

3

Foreign

Agent

NSP POP

Foreign

Network

for A

4

2

Home

Agent

IP

Network

5

1

  • Research issues:

  • Can Mobile IP replace roaming

  • Security issues

  • Performance issues

ISP Servers

Flash OFDM

Uses Mobile IP

For cellular networks

Copyrights: Amjad Umar


Wireless networks l.jpg

WIRELESS NETWORKS

Different type of wireless networks support mobile computing applications and platforms

  • Wireless Personal Area Networks (Bluetooth, Sensors, UWB, Zigbees)

  • Wireless LANs (802.11 family)

  • Fixed Wireless Local loops

  • Cellular networks

    • 1G to 5G

  • Satellite systems

    Many Research Issues: short list

  • Lower level issues (e.g., signaling, error correction, smart antennas)

  • Mobile Adhoc Networks

  • Voice over 802.11

Copyrights: Amjad Umar


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Copyrights: Amjad Umar


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  • Research and Development issues unique to wireless

  • Frequency allocation (efficient frequency utilization)

  • Multiple Access (CDMA vs TDMA)

  • Location services (Data rate versus speed of mobile devices)

  • Error correction (e.g., Turbo codes)

  • Signalling and encoding (PCM versus Delta code modulation)

  • Antenna design (smart antennas)

Copyrights: Amjad Umar


Wireless pans home networking l.jpg

Wireless PANs: Home Networking

  • Players:

  • Bluetooth

  • Sensor networks

  • UWB

  • 802.11

  • Zigbees

  • HomeR/F (dead)

Copyrights: Amjad Umar


Bluetooth l.jpg

Bluetooth

PSTN

Access

Point

Cellular

Network

Wired

LAN

Bluetooth Piconet

(1 Mbps, 10 meters, mobile adhoc network)

Copyrights: Amjad Umar


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Wireless Sensor Networks

Sensor = mote

Many R&D

efforts

Copyrights: Amjad Umar


802 11 family lans l.jpg

Centrex

11a, 11b, 11g

11n

11i – security

11e – QoS

802.11 Family LANs

Link to

Public Ethernet

C

D

T1

or

DSL

LAN Server

Wireless LAN Cell

Wireless LAN Cell

Z

Y

Router

Wired Ethernet LAN

  • X, Y, Z are

  • access points

  • for the wireless

  • Ethernet LANs

Wireless LAN Cell

X

  • A, B, C, D are

  • student laptops

A

B

Copyrights: Amjad Umar


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Wireless Local Loops

Inter-

Exchange

Switch

Telephone

  • Narrowband –telephony services

  • Broadband –high-speed data service

LAN

Toll

Connecting

Trunks

Wireless

Local Loop

Offerings

(MMDS, LMDS)

PBX, TV

Intertoll

Trunks

Telephone

Inter-

Exchange

Switch

Local

Control

Office

Toll

Connecting

Trunks

Wired

Local

Loop

Interesting

applications

Copyrights: Amjad Umar


Cellular networks l.jpg

Cellular Networks

Cell 1

Public

Switched

Telephone

Network

(PSTN)

Mobile

Telephone

Switching

Center

(MTSC)

Cell 2

HLR

VLR

Base Transceiver Station (BTS)

Mobile User

HLR = Home Location Register

VLR = Visitor Location Register

Cordless connection

Wired connection

Copyrights: Amjad Umar


Evolution 1g to 5g l.jpg

Evolution: 1G to 5G

4-5G

(10 Mbps+)

Data Rates

2 Mbps

3G

(144Kbps to 2Mbps)

1 Mbps

100 Kbps

2.5G

(10-150Kbps)

10 Kbps

2G

(9.6Kbps)

  • Research Issues

  • Mobility vs data rate

  • error correction

  • Intelligent Antennas

  • Intelligent radio

1 Kbps

1G

(<1Kbps)

1980

2010

1990

2000

Years

Copyrights: Amjad Umar


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Satellite Communications

GEO= 35,000 km, 250 ms delay

LEO = 4,000 km, 20 ms delay

MEO = 10,000 km, 50 ms delay

Copyrights: Amjad Umar


Research issue deep space networking l.jpg

Research Issue:Deep Space Networking

Copyrights: Amjad Umar


Other issues l.jpg

Other issues

  • Integration

  • Security

  • Management and support

  • Regulations and standards

  • Wireless Business and Industry

Copyrights: Amjad Umar


Integration vision l.jpg

Home

LAN

(802.11)

Content

Web

Office

Provider

Content

LAN

(802.11)

Wireless

and Wired

Content

WAN

Enterprise

Cellular

Provider

Databases

Cell

Cellular

(GSM, GPRS)

Cell

(3G)

Content

Provider

Hotspot

LAN

Home

(802.11)

Enterprise

Web

LAN

Databases

Content

(Bluetooth)

Integration – Vision

Copyrights: Amjad Umar


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Integration Framework

Copyrights: Amjad Umar


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Vertical Versus Horizontal Integrations

App2

Platform2

App1

Platform1

App1

Platform1

Network1

App 2

Platform2

Network2

Integrated Physical Network

b). Horizontal Integration

at Network Level

a). Total Vertical Integration

App1

Network1

App 2

Network2

Integrated Applications

Platform1

Network1

Platform2

Network2

Integrated Platform + IP

c). Horizontal Integration

at Platform Level

d). Horizontal Integration

at Application Level

Copyrights: Amjad Umar


Wireless security the big picture l.jpg

Wireless Security – The Big Picture

  • Latest Security Technologies

  • Cryptographic techniques

  • Managing digital certificates and PKI

  • Secure payment systems

  • Significant research developments

Unique issues:

- medium

- mobility

Security

Solutions

  • IT Assets

  • Applications and automated services

  • Databases, files

  • Computing platforms

  • Middleware (e.g., web servers)

  • Networks (hardware, routing software)

  • External Factors

  • Intruder/attacker/assault Threats

  • Privacy and confidentialty laws

  • Consumer/customer attitudes

  • Organizational Requirements

  • Survivability and Tolerance

  • Requirements

  • QoS Requiremensts

  • Budgettary and policy restrictions

  • Physical Assets

  • Humans

  • Buildings

  • Other corporate assets

  • (e.g., planes, trains, and

  • automobiles)

Copyrights: Amjad Umar


User view pia4 l.jpg

User View (PIA4)

Privacy

  • assure privacy of information (i.e., no one other than the authorized people can see the information) in storage or transmission

    Integrity

  • the integrity of information (i.e., no unauthorized modification)

    Authentication:

  • identify for certain who is communicating with you

    Authorization (Access control):

  • determine what access rights that person has).

    Accountability (Auditing): .

  • assure that you can tell who did what when and convince yourself that the system keeps its security promises.

  • Includes non-repudiation (NR) -- the ability to provide proof of the origin or delivery of data.

  • NR protects the sender against a false denial by the recipient that the data has been received. Also protects the recipient against false denial by the sender that the data has been sent..

  • a receiver cannot say that he/she never received the data or the sender cannot say that he/she never sent any data

    Availability: access to system when a user needs it

Copyrights: Amjad Umar


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Sample Wireless Security Technologies

  • SET for transaction security

  • S/MIME and PGP for secure email

  • Java security (sandboxes)

  • Database security

Applications

Can use

higher level

services to

compensate

for lower layers

Tradeoffs in

performance and security

  • SSL and TLS

  • WAP security (WTLS)

  • Web security (HTTPS, PICS, HTTP Headers)

  • Proxy server security

Middleware

TCP/IP

  • IPSEC and wirless VPN

  • Mobile IP

  • 802.11 security (WEP)

  • Cellular network security

  • Satellite link security

  • WLL and cordless link security

Wireless

Link

Copyrights: Amjad Umar


Wireless security example l.jpg

Centrex

Wireless Security Example

Link to

Public Internet

C

D

T1

or

DSL

LAN Server

Wireless LAN Cell

Wireless LAN Cell

Z

Y

Router

and

Firewall

Fast Ethernet

LAN(Backbone)

Wireless LAN Cell

1. No physical net security

(server ID/PW)

2. No physical net security

(server ID/PW + encryption)

3. Physical net security at APs

(optional

server ID/PW + encryption)

X

Wired Ethernet LAN

A

B

Copyrights: Amjad Umar


Wireless management and business l.jpg

Wireless Management and Business

Copyrights: Amjad Umar


Wireless value chain l.jpg

Wireless

Wireless

Middleware/

Content

Mobile

Mobile

Enterprise

Network

Network

Gateway

Providers/

Application

Device

Wireless

Element

Users

Operators

Providers

Aggregators

Providers

Builders

Providers

Wireless Value Chain

Copyrights: Amjad Umar


Slide32 l.jpg

Wireless

Telephone

Business

Wireless Data

Network

Business

Wireless

Management Business

Wireless

Consulting

Business

Reference

Model

7. Application

Applications

(e.g., SMS, email,

Wireless Web,

Mobile EC/EB)

Wireless

Telephony

Applications

and

Services

Wireless

Application

and

Platform

Management

Systems

Consulting

6. Presentation

5. Session

4. Transport

IP Data

Network

Routing

PSTN

Routing

3. Network

Wireless

Network

Management

Wireless

Network

Consulting

and

Engineering

Services

Physical Network Elements

2. Data Layer

(Cellular networks,

Wireless LANs, Satellites,

Wireless Local Loops)

Call

Switching

1. Physical

Copyrights: Amjad Umar


Course outline mobile computing and wireless communications l.jpg

Course Outline: Mobile Computing and Wireless Communications

Legend:

U: Umar, A., "Mobile Computing and Wireless Communications”

Sessions

Session 1: Introduction and Mobile Applications U-Ch.1-Ch.2

Session 2: Wireless Web and Wireless Platforms - (U-Ch.3)

Session 3: WAP, VoiceXML - (U-Ch.4)

Session 4: Wireless Communication Principles (Antennas, Signals) - (U-Ch.5), (S – Ch. 5-6)

Session 5: Wireless Communication Technology (spread spectrum, coding and error control ) - (U-Appendix B)

Session 6: Wireless LANs and IEEE 802.11 (U-Ch. 6)

Session 7: Mobile Adhoc Networks and WPANs (U-Ch. 6, Ch. 7)

Session 8:, Bluetooth, UWB, Wireless Sensor Networks (U-Ch. 7-Ch. 10)

Session 9: Cellular Networks - 2G, 2.5G, 3G (U-Ch. 8)

Session 10: Fixed wireless networks and wireless local loops (U-Ch. 9)

Session 11: Satellite Communications, FSO, Flash OFDM - (U-Ch. 9, Ch. 10)

Session 12: Wireless Architectures and Traffic Engineering (U-Ch. 11)

Session 13: Special topics - wireless security, wireless network management (U-Ch. 12, 13)

Session 14-15: Student led discussion on various research and development topics (Project 3)

Note: For variants of this course and additional details/instructional materials, contact me.

Copyrights: Amjad Umar


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Textbook: “Mobile Computing and Wireless Communications”, A. Umar, NGE Solutions, 2004. Available through Amazon.com

Part I: Mobile Computing Applications and Platforms

Chapter 1: Overview and the Big Picture

Chapter 2: Mobile Computing Applications: Supporting M-Business and M-Government

Chapter 3: Wireless Internet, Mobile IP, and Wireless Web

Chapter 4: Mobile Computing Platforms, Middleware, and Servers

Part II: Wireless Networks

Chapter 5: Wireless Network Principles

Chapter 6: Wireless LANs -- 802.11 and Mobile Ad Hoc Networks

Chapter 7: Wireless Personal Area Networks: Bluetooth, UWB, and Sensor Networks

Chapter 8: Cellular Networks -- From 1G to 5G

Chapter 9: Wireless Local Loops and Satellite Communications

Chapter 10: Emerging Wireless Networks: UWB, FSO, MANET, and Flash OFDM

Part III: Architectures, Security and Management

Chapter 11: Integrated Architectures for Wireless

Chapter 12: Wireless Security

Chapter 13: Management and Support Issues

Part IV: Appendices

Appendix A: Tutorial on Network Basics

Appendix B: Closer Look at Physical Wireless Communications

Ebook version for instructor evaluation and instructor materials are available (contact me)

Copyrights: Amjad Umar


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Concluding Comments

  • The following framework (see figure on next page) provides a good framework for R&D trends in mobile computing and wireless communications

  • Additional details

    • Email: umar@amjadumar.com

    • Website: www.amjadumar.com

Copyrights: Amjad Umar


Framework for discussion the building blocks of mobile computing and wireless communications l.jpg

Framework for Discussion: The Building Blocks of Mobile Computing and Wireless Communications

Research and development

in every building block

Copyrights: Amjad Umar


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