SESSION%20:%20Mobile%20Computing%20and%20Wireless%20Communications%20--%20Overview - PowerPoint PPT Presentation

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SESSION%20:%20Mobile%20Computing%20and%20Wireless%20Communications%20--%20Overview

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Growing rapidly with many diverse applications. Many strengths but a few weaknesses ... Devices (laptops, palm pilots, beepers, PDA, sensors) Networks: wireless ... – PowerPoint PPT presentation

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Title: SESSION%20:%20Mobile%20Computing%20and%20Wireless%20Communications%20--%20Overview


1
SESSION Mobile Computing and Wireless
Communications -- Overview
  • Framework for discussion
  • Business drivers M-Business, M-Government,
    M-Life
  • Mobile Applications
  • Platforms to support mobile commerce
  • Wireless middleware
  • Wireless Networks
  • Cellular networks from 1 to 3G Networks
  • Wireless LANs
  • Satellites

Amjad Umar
2
Overview
  • Growing rapidly with many diverse applications
  • Many strengths but a few weaknesses
  • Different aspects of mobility
  • People (customers, suppliers, employees)
  • Devices (laptops, palm pilots, beepers, PDA,
    sensors)
  • Networks wireless
  • Mobile devices and wireless networks are not
    always same

3
The Jargon
4
Framework for Discussion
5
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
  • Specialized applications
  • Location sensitive apps
  • Wireless sensor network apps
  • Mobile agent apps
  • Two views
  • Mobile applications are fundamentally new
    applications.
  • Mobility is another dimension of the existing
    applications

6
Mobile Computing Applications Categorization
B2B
C2B, B2C
B2E, E2B
Business
Employees
Consumer
B2G, G2B
C2G, G2C
E2G, G2E
Citizens
Government
Employees
G2G
7
Mobile Computing Platforms
8
Internet as the Network Platform
9
Wireless Web
10
WAP(Wireless Application Protocol)
  • Intended for data entry/display on cellular
    phones
  • An open, global specification that empowers
    mobile users with wireless devices to
  • easily access and interact with information and
    services instantly. www.wapforum.org
  • Complete protocol stack similar to Internet
    protocols but optimized for wireless
  • information pull and push transport layer and
    above across multiple wireless technologies

11
WIRELESS NETWORKS
  • Different type of wireless networks support
    mobile computing applications and platforms
  • Cellular networks
  • 1G to 5G
  • Wireless LANs (802.11)
  • Bluetooth
  • Satellite systems
  • Fixed Wireless Local loops
  • Mobile Adhoc Networks

12
(No Transcript)
13
  • Issues unique to wireless
  • Frequency allocation
  • Multiple Access
  • Location

14
A Sample Wireless School
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
15
Bluetooth
  • Founders Ericsson, IBM, Intel, Nokia, Toshiba
    May 98
  • Currently Over 850 companies, V1.0 spec issued
    7/99
  • Small form factor, low-cost, short range radio
    link between mobile PCs, phones and other
    portable devices
  • Relatively fast, short packets
  • Software for service and device discovery
  • Typical application cellular phone to PDA or
    earphone
  • Forecast 79 of digital handsets and gt 200
    million PCs will use Bluetooth by 2002 --
    Dataquest

16
Bluetooth
PSTN
Access Point
Cellular Network
Wired LAN
Bluetooth Piconet (1 Mbps, 10 meters)
17
Wireless Local Loops
18
A Cellular Network
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
19
Cellular networks What is 3G Anyway?
  • 1G First generation wireless cellular Early
    1980s
  • Analog transmission, primarily speech
  • 2G Second generation wireless cellular Late
    1980s
  • Digital transmission
  • Primarily speech and low bit-rate data
  • High-tier GSM, IS-95 (CDMA), etc
  • Low-tier (PCS) Low-cost, low-power, low-mobility
    e.g. PACS
  • 2.5G 2G evolved to medium rate (lt 100kbps) data
  • 3G future Broadband multimedia
  • 144 kbps - 384 kbps for high-mobility, high
    coverage
  • 2 Mbps for low-mobility and low coverage

20
Evolution to 3G
Data Rates
2 Mbps
3G (144Kbps to 2Mbps)
1 Mbps
100 Kbps
2.5G (10-150Kbps)
10 Kbps
2G (9.6Kbps)
1 Kbps
1G (lt1Kbps)
1980
2010
1990
2000
Years
21
Wireless LANs
  • First generation of products at about 1-2 Mbps
  • Lucents WaveLAN, RadioLAN, etc.
  • factor of 10 less bandwidth than current Ethernet
  • Next generation of products at 10-11 Mbps
  • factor of 10 less bandwidth than 100 Mbps
    Ethernet
  • IEEE 802.11 standard
  • very successful at present (wi-Fi)
  • Can deliver up to 64 mbps
  • Important niche and enterprise applications (e.g.
    hospitals)
  • Increasing horizontal market interest (e.g. SOHO)

22
Satellite Communications
23
Other issues
Integration Security Management and support
Regulations and standards Wireless Business
and Industry
24
Wireless Telephone Business
Wireless Management Business
Wireless Consulting Business
Wireless Data Network 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
25
Summary
  • Mobile applications is a tremendous area of
    growth
  • Business drivers such as M-Business are
    significant
  • Mobile computing platforms have to handle special
    cases
  • Slow line speeds (19.2 Kbps)
  • Congestions are usual
  • More error prone
  • Different types of wireless networks
  • Cellular
  • Wireless LANs
  • Satellites
  • Wireless local loops
  • Many emerging areas sensor networks, Mobile
    Adhoc Networks, Free Space Optics
  • Many issues in Architectures, security and
    management
  • Standards work is also progressing in many areas
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