Wireless Technology - Bhecker.com

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21 Νοε 2013 (πριν από 3 χρόνια και 8 μήνες)

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1

The Wireless
Revolution


2


Identify the principal wireless transmission media
and devices, cellular network standards and
generations, and standards for mobile Web
access



Describe the major standards for wireless
networks and for wireless Internet access



Evaluate the role of m
-
commerce in business and
describe the most important m
-
commerce
applications

OBJECTIVES

3


Assess the business value of wireless technology
and describe important wireless applications in
business




Identify and describe the challenges posed by
wireless technology and management solutions

OBJECTIVES (Continued)

4

The Wireless Revolution


Mobile phones have become mobile platforms for
delivering digital data, used for recording and
downloading photos, video and music, Internet
access, and transmitting payments.



An array of technologies provides high
-
speed
wireless access to the Internet for PCs and other
wireless handheld devices and cell phones.



Businesses increasingly use wireless to cut costs,
increase flexibility, and create new products and
services.

THE WIRELESS COMPUTING LANDSCAPE


5

Mobile Versus Fixed
-
line Subscribers Worldwide


THE WIRELESS COMPUTING LANDSCAPE


6


Wireless communication helps businesses easily
stay in touch with customers, suppliers, and
employees.



Wireless networking increases worker
productivity and output, as workers take less time
to establish contact with people and to access
information.

THE WIRELESS COMPUTING LANDSCAPE


Business Value of Wireless Networking

7

THE WIRELESS COMPUTING LANDSCAPE



Companies can save on wiring offices, moving,
and making network changes by using wireless
networks.



Wireless technology has also been the source of
new products, services, and sales channels in a
variety of industries, e.g. OnStar, Starbucks “hot
spots”.

Business Value of Wireless Networking (Continued)

8


All wireless media rely on various parts of the
electromagnetic spectrum.



Microwave systems transmit high
-
frequency
radio signals through the atmosphere.



Communication satellites are used for
geographically dispersed organizations.

THE WIRELESS COMPUTING LANDSCAPE


Wireless Transmission Media and Devices

9

Frequency Ranges for Communications Media and
Devices

THE WIRELESS COMPUTING LANDSCAPE


10

Amoco’s Satellite Transmission System

THE WIRELESS COMPUTING LANDSCAPE


11

THE WIRELESS COMPUTING LANDSCAPE


Devices for Wireless Transmission:


Paging systems



E
-
mail handhelds



Cellular telephones



Personal Digital Assistants (PDAs)



Smart phones

12

THE WIRELESS COMPUTING LANDSCAPE


Standards:



Global System for Mobile Communication (GSM)



Code Division Multiple Access (CDMA)

Cellular Network Standards and Generations

13

THE WIRELESS COMPUTING LANDSCAPE


Cellular Generations:


1G:

Analog cellular networks for voice
communication



2G:

Digital wireless networks, primarily for voice
communication; limited data transmission
capability

14

THE WIRELESS COMPUTING LANDSCAPE



2.5G:

Interim step toward 3G in the United States



3G:

High
-
speed; mobile; supports video and
other rich media; always
-
on transmission for e
-
mail, Web browsing, instant messaging

Cellular Generations: (Continued)

15

THE WIRELESS COMPUTING LANDSCAPE


Mobile Wireless Standards for Web Access


Wireless Application Protocol (WAP):

Uses Wireless
Markup Language (WML) and micro
-
browsers



I
-
mode:

Uses compact HTML and allows for
continuous connection

16

Wireless Application Protocol (WAP) versus I
-
mode

THE WIRELESS COMPUTING LANDSCAPE


17

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

The Institute of Electrical and Electronics Engineers (IEEE)
established a hierarchy of complementary standards for
wireless computer networks.

Global Wireless Network Standards:


IEEE 802.15 (Bluetooth) for the Personal Area
Network (PAN)



IEEE 802.11 (Wi
-
Fi) for the Local Area Network
(LAN)

18

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS


IEEE 802.16 (WiMax) for the Metropolitan Area
Network (MAN)



IEEE 802.20 (proposed) standard for the Wide
Area Network (WAN)

Global Wireless Network Standards: (Continued)

19

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

Bluetooth


Can link up to 8 devices in 10
-
m area



Low power requirements

20

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

Wi
-
Fi


Three standards:

802.11a, 802.11b, 802.11g



Infrastructure mode:

Devices use access point to
communicate with wired network



Ad
-
hoc mode (peer
-
to
-
peer):

Wireless devices
communicate directly with each other

21

A Bluetooth Network (PAN)

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

22

An 802.11 Wireless LAN

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

23

M
-
COMMERCE AND MOBILE COMPUTING


M
-
commerce:

The use of the Internet for
purchasing goods and services and also for
transmitting messages using wireless mobile
devices



Mobile computing:

Enables internet
-
enabled cell
phones, PDAs, and other wireless computing
devices to access digital information on the
Internet from any location

24

Global M
-
Commerce Revenue, 2000

2005

M
-
COMMERCE AND MOBILE COMPUTING

25

M
-
COMMERCE AND MOBILE COMPUTING

M
-
Commerce Services and Applications


Information
-
based services:

Instant messaging,
e
-
mail, searching for a movie or restaurant using
a cell phone or handheld PDA



Transaction
-
based services:

Purchasing stocks,
concert tickets, music, or games; searching for
the best price for an item using a cell phone and
buying it in a physical store or on the Web

26

M
-
COMMERCE AND MOBILE COMPUTING


Personalized services:
Services that anticipate
what a customer wants based on that person’s
location or data profile, such as updated airline
flight information or beaming coupons for nearby
restaurants

M
-
Commerce Services and Applications (Continued)

27

Customer Personalization with the Ubiquitous Internet

M
-
COMMERCE AND MOBILE COMPUTING

28

M
-
COMMERCE AND MOBILE COMPUTING

Accessing Information from the Wireless Web


Wireless portals:
Content and services optimized
for smaller screens of mobile devices to steer
users to the information they are most likely to
need



Voice portals:

Accept voice commands for
accessing Web content, e
-
mail, and other
electronic applications from a cell phone or
standard telephone

29

M
-
COMMERCE AND MOBILE COMPUTING

Digital Payment Systems and M
-
Commerce


Micro
-
payment system

o
Individual service providers run their own
separate payment systems

o
Small payments added on to single bill



Stored payment system

o
Cell phone equipped with smart card storing
rechargeable electronic cash



Mobile Wallets (m
-
Wallets):

Store personal data to
use in online transactions

30

M
-
COMMERCE AND MOBILE COMPUTING

M
-
Commerce Challenges


Slow data transfer speeds on second
-
generation
cellular networks, resulting in higher costs to
customer



Limited memory and power supplies



31

M
-
COMMERCE AND MOBILE COMPUTING


More Web sites need to be designed specifically
for small wireless devices.



Keyboards and screens on cell phones are still
tiny and awkward to use.

M
-
Commerce Challenges (Continued)

32

WIRELESS TECHNOLOGY IN THE ENTERPRISE

Wireless Applications for Customer Relationship
Management



Access customer account records and
information at any time or location


Wireless CRM enables sales and field service
professionals to:

33


Update customer accounts and deal information
to update customer database instantaneously



Receive alerts to important events



Enter, perform, and update transactions and
product information

WIRELESS TECHNOLOGY IN THE ENTERPRISE

Wireless Applications for Customer Relationship
Management (Continued)

34

Pitney Bowes’s Wireless CRM System


WIRELESS TECHNOLOGY IN THE ENTERPRISE

35

Wireless Supply Chain Management (SCM) and Radio
Frequency Identification (RFID)


Wireless supply chain management systems:
Provide simultaneous accurate information about
demand, supply, production, and logistics as
goods move among supply chain partners




Radio Frequency Identification (RFID) systems:

Provide a powerful technology for tracking the
movement of goods throughout the supply chain

WIRELESS TECHNOLOGY IN THE ENTERPRISE

36

How RFID Works

WIRELESS TECHNOLOGY IN THE ENTERPRISE

37

Wireless Applications:


Electronic Medical Record (EMR) retrieval



Wireless note taking for patient charts



Lab test results



Prescription generation



Medical databases

WIRELESS TECHNOLOGY IN THE ENTERPRISE

Wireless in Health Care


38

Wireless Sensor Networks and Pervasive Computing


Wireless sensor networks (WSNs):
Networks of
interconnected wireless devices that are
embedded into the physical environment to
provide measurements of many points over large
spaces


WIRELESS TECHNOLOGY IN THE ENTERPRISE

39


Pervasive computing:

Wireless technologies are
pushing computing into every facet of life,
including cars, homes, office buildings, tools and
factories; providing connections anywhere and
anytime.

WIRELESS TECHNOLOGY IN THE ENTERPRISE

Wireless Sensor Networks and Pervasive Computing
(Continued)

40

A Wireless Sensor Network

WIRELESS TECHNOLOGY IN THE ENTERPRISE

41

MANAGEMENT OPPORTUNITIES, CHALLENGES, AND SOLUTIONS

Management Opportunities:

Wireless technology offers:



Flexible business processes



Business processes not limited by time or space



New channel for communicating with client



Source of new products and services

42

MANAGEMENT OPPORTUNITIES, CHALLENGES, AND SOLUTIONS

Management Challenges:


Integrating wireless technology into the firm’s IT
infrastructure




Maintaining security and privacy



43

MANAGEMENT OPPORTUNITIES, CHALLENGES, AND SOLUTIONS

Solution Guidelines:


Identifying areas in which wireless can provide
value



Creating a management framework for wireless
technology



Using a pilot program before full
-
scale rollout of
wireless systems


The following are some of the guidelines for managing
mobile technology in the enterprise: