CHAPTER 8: Wireless Technologies and the Modern Organization

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Nov 24, 2013 (3 years and 10 months ago)

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CHAPTER
8
:
Wireless Technologies and the Modern
Organization


Chapter Outline


8
.1

Wireless Technologies

8
.2

Wireless Computer Networks and Internet Access

8
.3

Mobile Computing and Mobile Commerce

8
.4

Perva
sive Computing

8
.5

Wireless Security


Learning Objectives


1.

Describe the four main types of wireless transmission media, and identify at least one
advantage and one disadvantage of each type.

2.

Discuss the basic purposes of short
-
range, medium
-
range, and l
ong
-
range networks, and
explain how businesses can use at least one technology employed by each type of network.

3.

Discuss the five major m
-
commerce applications, and provide a specific example of how
each application can benefit a business.

4.

Define pervasi
ve computing, describe two technologies that underlie this technology, and
provide at least one example of how a business can utilize each one.

5.

Identify the four major threats to wireless networks, and explain, with examples, how each
one can damage a bus
iness.


Teaching Tips and Strategies


Wireless communications has become so ubiquitous, most students seldom think about it or its
implications, so m
ost students will not need to be told, “What’s in it for me?”
Mo
st
of them
have a personal computer
with
some
form

of Internet connection
. Given the growth of
smartphones, a number the students will also have used some
mobile computing applications
other than simple cell phone usage.



The first thing they need to understand is
the difference between wireles
s and mobile

communications.

W
ireless means exactly what it says: without wires.
In contrast
, mobile refers
to something that changes its location over time. Wireless networks can be
either
mobile (e.g.
Internet

over cell phones) or fixed (e.g.
Wi
-
Fi
).


I suggest starting the class by having students brainstorm
to identify
information and services
that already
are
available and
other apps
they would like to have available through mobile
computing. Focus especially on location
-
based commerce to really pi
que their interest. Then,
have
students consider the implications for
the businesses that would have to provide
the
information and services. In other words, how will businesses have to transform themselves to
satisfy consumer demands for mobile computin
g applications?
This topic segues logically
into a
discussion of the benefits and drawbacks of mobile computing.

Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
2


Next, discuss privacy
issues
associated with mobile computing, especially RFID and Auto
-
ID.
Most students feel that the government and employ
ers have no right to monitor
their
movements
and location. This leads to a great discussion. I sometimes break the class into different groups
and assign them different perspectives. One point of view
is
the employer
’s
. I ask the students
,

if you were
an employer of mobile workers (such as service technicians), would you want to pay
for an employee to run personal errands while on the job? The other perspective
is
the
employee’s. Isn’t it all right to use company time and equipment to stop at the dry
cleaners
while on the job? When having this discussion
,

try to remain
impartial
,

at least at first.
Your
adopting an
impartial
position
helps students complete their thoughts on the benefits and
drawbacks of mobile computing and related privacy concerns.


Review Questions


Section 8.1 … Before you go on…


1.


Describe the most common types of wireless devices.




Pagers


one way wireless devices



PDA


personal digital assistant, a small handheld wireless device.



GPS


global position system, a satellite
-
b
ased tracking system that enables

people to
determine the location

of a GPS device’s location.



Smartphone


Internet
-
enabled cell phones that can support mobile applications.


2.


Describe the various types of transmission media.



Microwave, satellite
,

a
nd infrared are
line
-
of
-
sight

methods
,

whereas
radio signals travel
through the air and can pass through walls.



Section 8.2 … Before you go on…


1.


What is Bluetooth? What is a WLAN?




Bluetooth

is a device used to create small wireless radio
-
based pe
rsonal networks for up
to 8 devices within 10 meters
using low
-
power, radio
-
based communication
.



Wireless local area networks

are local area networks without the cables used to transmit
and receive data via radio waves.


2.


Describe Wi
-
Fi, cellular servi
ce, and WiMAX.


Wireless Fidelity
-

known as Wi
-
Fi.



802.11a transmits up to 54 Mbps within 10
-
30 meters



802.11b transmits up to 11 Mbps within 30
-
50



802.11g transmits up to 54 Mbps and is compatible with 802.11b


Major benefits are low cost and the abil
ity to provide simple Internet access.

Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

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3



Cellular services
-

communicate with radio antenna placed within adjacent areas called cells.
This technology


uses digital signals and can transmit voice and data up to 384 Kbps when
device is used while walking,
128 Kbps while in a car, and up to 2Mbps when device is in a
fixed location.


WiMax
-

Stands for Worldwide Interoperability for Microwave Access
.

WiMax has a range
of up to 31 miles compared to 300 feet for Wi
-
Fi and 30 feet for Bluetooth. It has a transf
er
rate of
up to
75 Mbps.


Section 8.3 … Before you go on…


1.


What are the major drivers of mobile computing?




Widespread availability of mobile devices



No need for a PC



The “
c
ell
p
hone
c
ulture”



Declining
p
rices



Improved b
andwidth


2.


Describe mobile p
ortals and voice portals.


Mobile portals
-

A customer interaction channel that aggregates content and services for
mobile users. Services include news, sports, e
-
mail, entertainment, travel information,
restaurant and event information, games, TV and mov
ie listings, community services, and
stock trading.


Voice Portals


A Web site with an audio interface. Voice portals are not Web sites in the
normal sense

because they can also be accessed through a standard or a cell phone. A
certain phone number conne
cts you to a Web site, where you can request information
verbally. The system finds the information, translates it into a computer
-
generated voice
reply, and tells you what you want to know.

An example is 511, the travel

information line
developed by Tell
me.com.


3.


Describe wireless financial services.


The services provide a convenient way
for customers
to transact business regardless of
the
time or their location.
These services include banking, wireless payments and
micropayments, wireless wallets, bi
ll
-
payment services, brokerage services, and money
.
.


4.


List some of the major intrabusiness wireless applications.




There are applications
that
help owners of rental vehicles, commercial transport
,

and
heavy equipment fleets.
These apps can be used to
determine
the
location of the vehicles
and control messages
that
are sent to and from
the
vehicles.


Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
4




Insurance companies use wireless digital cameras to take pictures at accident scenes and
transmit

them

to processing centers.



Mystery customers who file re
ports after evaluating locations of a national restaurant
franchise use hand
-
held devices to file reports.


Section 8.4 … Before you go on…


1.


Define pervasive computing, RFID, and wireless sensor networks.


Pervasive computing

is invisible “everywhere c
omputing” that is embedded in the objects
around us, including the floor, lights, cars, the washing machine, cell phones, our clothes, etc.


RFID

is the technology
that enables

manufacturers to attach tags with antennae and computer
chips on goods and then

track their movement through radio signals. This technology was
developed to replace barcodes.


Wireless sensor networks

are networks of interconnected, battery
-
powered, wireless sensors
called
motes

that are placed into the physical environment. The mo
tes collect data from
many points over an extended space. Each mote contains processing, storage, and radio
frequency sensors and antennae. This technology enables more accurate information to be
gathered.


2.


Provide two specific business uses of RFID
technology.




Retail companies use RFID to track inventory and shipments.



Tolls roads use RFID to collect fees without the need for toll booth personnel.



Section 8.5 … Before you go on…


1.


Describe the four major threats to the security of wireless ne
tworks.


The four threats are rogue access points, war driving, eaves dropping and RF jamming.


2.


Which of these threats is the most dangerous for a business? Which is the most dangerous
for an individual? Support your answers.


The
most dangerous
th
reats
for a business are war driving and RF jamming. For individuals,
rogue access points are
the
most
serious threat, particularly at
public hotspots. Eavesdropping
is
threatening
for both business and individual networks.


IT’s About Business Questions


IT’s About Business 8.1

Tacos, Trucks, and Tweets?


Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
5


1.

Provide specific examples of the advantages that mobile communications provided to Mark.



Mark

was able to let his customers know via
Twitter
and via his
Web site

where his truck
was

or will be.


He

was able to tack his other vehicles and reroute them if he felt necessary.



2.


Which technology, Twitter or mobile communications, enables the other? Support your
answer.




Mobile communications enable mobile technologies such as Twitter. This is bec
ause most
users use their smart (mobile) phones to send the messages via Twitter.


IT’s About Business 8.2

WiMAX Helps the People of Northern

Thailand


1.

Provide specific examples of other advantages that WiMAX can deliver to the villagers.




Educational prog
rams that were not available to the villagers previously.



Electronic textbooks



The a
bility of the villagers to collaborate with one another has helped create a sense of
unity in the region.



Access to information

that was not easily available to them previo
usly



The network was easy to set up

and relatively inexpensive
.


2.

Provide specific examples of the advantages of WiMAX compared to wireline
communications.


Compared to wireline, WiMAX provides wider coverage at a lower cost. WiMAX
coverage can reach a 31
-
m
ile radius. In order to cover the same area, physical
wireline must be must be laid out to each establishment.




IT’s About Business

8.3

Location
-
Based Services at Shopping

Malls


1.

Are the advantages of the mall apps discussed in this case enough to entic
e you to go to a
mall? Why or why not? Support your answer.


The responses you will receive will differ based on your students shopping habits.

Regardless
of whether they respond yes or no, however
,
students
should provide
concrete
reason
s

why
they think t
he mall apps described in the case are enough (or not enough) to persuade them to
shop at the mall.


2.

Identify two specific benefits that you would add to mall apps to make them functional
enough to attract shoppers to the mall.

Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
6



The responses you will rece
ive will differ based on your students


shopping habits.

Some
ideas
are to provide
apps
-
only discount coupons to use in stores or
the
food center,
and to
enhance
the scavenger hunt
-
style game with daily special rewards to the first ten customers
who spot c
ertain things in the mall during their shopping trip.


IT’s About Business 8.4

Your Car Becomes a

Smartphone


1.

Explain why OnStar, Sync, and Blue Link are telemetry applications.


Telemetry

is the wireless transmission and receipt of data gathered from remo
te sensors.
Telemetry has numerous mobile computing applications. Car manufacturers use telemetry
applications for remote vehicle diagnosis and preventive maintenance.


2.

Provide specific examples of the disadvantages of OnStar, Sync, and Blue Link.


Studen
ts will have different opinions, but some will involve tracking, the vehicles
transmitting erroneous information, etc.


IT’s About Business 8.5

Protecting an Open Wireless Network at Brigham Young University



Hawaii


1.

What are the advantages of the Avenda
system to the users?


Avenda automatically provides authorization privileges after a user is authenticated. That is,
once a user is identified, the system provides access only to those systems necessary for that
user to do his or her job, a process called

least privilege.


2.

Are there privacy issues associated with the Avenda system for users? If so, provide specific
examples.


IT team now controls and differentiates access to the wireless network, so they can determine
what users are doing on the network.

The team is also able to collect user information and
details about network usage.

However,
students
are required to sign the university honor
code of conduct
,

and their activities on the network can be monitored to
ensure they don’t
violate
the rules, ca
using harm to the users and the university.


Discussion Questions


1.

Discuss how m
-
commerce can expand the reach of e
-
business.


In the traditional computing environment, users
must have physical access
to a computer in
order to utilize its applications. T
he need to be linked by wires to computing resources
limited
the
usefulness
of this technology
to people who must be mobile while on the job. M
-
commerce is a natural extension of e
-
business,
but it is conducted
in a wireless environment.
Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
7


M
-
commerce serve
s the needs of an increasingly mobile work force and consumer
population.
.


2.

Discuss how mobile computing can solve some of the problems of the digital divide.


W
ireless devices
are becoming
cheaper, and
individuals can
take those devices to locations
where

they can connect

to the Internet
, often for free
. Consequently,
user
s

who
do
not have
access to a computer at home
can
use the
se

devices to connect to the Internet and gain the
benefits that otherwise would not be available

to them
.


3.

List three to four ma
jor advantages of wireless commerce to consumers, and explain what
benefits they provide to consumers.




Access to expertise: For example, medical service providers in remote locations could
communicate real
-
time with specialists in other places to provide

specialized
consultations. Consumers would benefit due to better access to specialized expertise
without the inconvenience or expense of traveling to a different location for the
consultation.



Access to information: For example, mobile portals provide c
onsumers access to a
personalized set of content and services regardless of location. This enables the
consumer to always have specified information available regardless of location.



Customized advertising: For example, location
-
based advertising can del
iver information
and coupons to inform consumers about shops, malls, and restaurants close to their
current location.



Access to services: For example, wireless banking enables consumers to carry out
various financial transactions from any location, furthe
r eliminating the need to go to a
bank or an ATM machine to carry out needed banking business.


4.

Discuss the ways in which Wi
-
Fi is being used to support mobile computing and m
-
commerce. Describe the ways in which Wi
-
Fi is affecting the use of cellular pho
nes for m
-
commerce.



Wi
-
Fi is the technical standard underlying most of today’s wireless local area networks
(WLANs). A mobile computing device can connect to the Internet easily from public access
points called hotspots. Mobile computing and m
-
commerce

applications can be delivered
easily
and
at adequate communication speeds in this environment. Wi
-
Fi is reducing the
need for wide
-
area
wireless
networks based on cellular technology
.


5.

You can use location
-
based tools to help you find your car or the clo
sest gas station.
However, some people see location
-
based tools as an invasion of privacy. Discuss the pros
and cons of location
-
based tools.


The benefits of location
-
based tools include the ability to request and receive information
that is tailored to

your exact location.
The concerns about this capability arise from the fact
that
other people
can obtain information about your exact location and movements and use
that information in
harmful
ways.
.

Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
8



6.

Discuss the benefits of telemetry in health care for
the elderly.


The
alerting
devices that
people can
wear around their neck are valuable for seniors who
need emergency assistance after a fall or when
they are experiencing
some other medical
problem.



7.

Discuss how wireless devices can help people with dis
abilities.


Sensors
that help people with disabilities
communicate with their computer and other
household devices
significantly enhance these individuals’ ability
to interface with their
environment
and perform
basic activities.


8.

Some experts say that Wi
-
Fi is winning the battle with 3G cellular service
.

O
thers disagree.
Discuss both sides of the argument, and support each one.


Students will discuss this in terms of speed, distance and cost and why one of these

services

is preferred over the other.


9.

Whi
ch of the applications of pervasive computing do you think are likely to gain the greatest
market acceptance over the next few years? Why?


Although the
student
s’

answers will vary, it is likely that applications that add
convenience without violating pri
vacy will be the ones to gain market acceptance.
For example, an application that provides information about
a product
for diagnostic
and repair purposes would be useful
because
the consumer could arrange for
the
product to be
repair
ed

before
it
fails.

.


Problem
-
Solving Activities


1.

Investigate commercial applications of voice portals. Visit several vendors (e.g.,
www.tellme.com
,
www.bevocal.com
, and so on). What capabilities an
d applications do these
vendors offer?


Students will research voice portals and report their findings.


2.

Using a search engine, try to determine whether there are any commercial Wi
-
Fi hotspots in
your area. (Hint: Access
http://v4.jiwire.com/search
-
hotspot
-
locations.htm
.) Also check
www.wifinder.com
.


Students will discuss use of handhelds, laptops, etc. after locating WI
-
Fi spots in their area.



3.

Exa
mine how new data capture devices such as RFID tags help organizations accurately
identify and segment their customers for activities such as targeted marketing. Browse the
Web and develop five potential new applications for RFID technology, not listed in

this
Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
9


chapter. What issues would arise if a country’s laws mandated that such devices be
embedded in everyone’s body as a national identification system?


Students should enjoy researching this topic and describe these wearable devices.


4.

Investigate comme
rcial uses of GPS. Start with
http://gpshome.ssc.nasa.gov
; then go to
http://www.neigps.com/
. Can some of the consumer
-
oriented products be used in industry?
Prepare a re
port on your findings.


Students will investigate and list products that can cross over between the end consumer and
industry markets.


5.

Access
www.bluetooth.com
. Examine the types of products being enhanced with B
luetooth
technology. Present two of these products to the class and explain how they are enhanced by
Bluetooth technology.


Various categories of products are listed in the web site. Students will investigate and
prepare a report on two of these products
. Students also examine any drawbacks to having
Bluetooth used in the product.


6.

Explore
www.nokia.com
. Prepare a summary of the types of mobile services and applications
Nokia currently supports and plans to support in

the future.


Students will investigate and prepare a report.


7.

Enter
www.ibm.com
. Search for wireless e
-
business. Research the resulting stories to
determine the types of wireless capabilities and applications IBM’s softw
are and hardware
supports. Describe some of the ways these applications have helped specific businesses and
industries.


Students are to look into the published case studies in the ibm.com web site under
“SOLUTIONS” and find some examples of cases that t
hey can share with the class.


8.

Research the status of 3G and 4G cellular service by visiting
www.itu.int
,
www.4g.co.uk
, and
www.3gnewsroom.com
.

Prepare a report on the status of 3G and 4G based on your findings.


Students will investigate and prepare a report.


9.

Enter Pitney
-
Bowes Business Insight (
www.pbinsight.com
). Click on MapInfo Professional,
then c
lick on the Resources tab, then on the Demos tab. Look for the location
-
based services
demos. Try all the demos. Summarize your findings.


Students will investigate and prepare a report.


10.

Enter
www.packetvideo.com
. Examine the demos and products, and list their capabilities.


Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
10


PV provides software to deliver mobile media services. PV's software gives users greater
access and control over their media experience. The CORE product provides a universal
structure for
mobile multimedia applications. MediaFusion is a white
-
label client
-
server
software application that enables rapid development and launch on
-
device portals for rich
media services.


11.

Enter
www.onstar.com
. What types of

fleet services does OnStar provide? Are these any
different from the services OnStar provides to individual car owners? (Play the movie.)


Students will play the movie and relate their experience.


12.

Access
www.itu.int/osg/spu/publications/internetofthings/InternetofThings_summary.pdf
.
Read about the Internet of Things. What is it? What types of technologies are necessary to
support it? Why is it importa
nt?


Internet of Things refers to the concept of embedding communications technology in
common devices like refrigerators and ovens in order to
extend the reach of Internet

to many
remote areas that do not have
an existing Internet

access infrastructure
Th
e
technologies
required
for creating
this type of
network include, but
are
not limited to, RFID, sensor
networks, nanotechnology, distributed computing networks, and telecommunication
technology.



Team Assignments


1.

Each team should examine a major vendor

of mobile devices (Nokia, Kyocera, Motorola,
Palm, BlackBerry,
Apple,
and so on). Each team will research the capabilities and prices of
the devices offered by each company and then make a class presentation, the objective of
which is to convince the rest

of the class why one should buy that company’s products.


Students will research the capabilities and prepare a report.

Focus on features supported by
the models, what bandwidth is needed to support the features and the quality of network
service and cos
t that is required by each.


2.

Each team should explore the commercial applications of m
-
commerce in one of the
following areas: financial services, including banking, stocks, and insurance; marketing and
advertising; manufacturing; travel and transportation
; human resources management;
public services; and health care. Each team will present a report to the class based on their
findings. (Start at
www.mobiforum.org
.)



There are a lot of options, particularly in the f
inancial industry, that students can choose.
Students will research the capabilities and prepare a report
.


3.

Each team should take one of the following areas

homes, cars, appliances, or other
consumer goods like clothing

and investigate how embedded micropr
ocessors are currently
being used and will be used in the future to support consumer
-
centric services. Each team
will present a report to the class based on their findings.

Chapter

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Wireless Technologies and the Modern Organization

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4
th

edition)

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Students will research the capabilities and prepare a report.


Closing Case


A Mo
bile Application for Home

Depot

The Business Problem


Home Depot (
www.homedepot.com
), the world’s largest retailer of home improvement and
construction products and services, has been lagging in information technolo
gy. In fact, IT was
an afterthought at Home Depot for years because the company’s primary emphasis was opening
new stores. Today, Home Depot has more than 2,000 retail outlets.

Until 2010, employees stocked shelves as they had for 15 years, using compu
ters powered by
motorboat batteries and rolled around stores on bulky carts. In early 2011, Home Depot still did
not offer customers the option to order online and pick up merchandise in stores, as Lowe’s
(
www.lowes.com
), Home Depot’s biggest competitor, already did. Further, when Home Depot
employees processed special orders for customers, they had to rely on outdated information
systems. This arrangement hurt both sales and service.

In 2007, Frank Blake became Home De
pot’s new CEO. Blake shifted the company’s focus to
increasing profits from existing stores. Inventory turns


a measure of how well a retailer turns
goods into sales


began to increase. However, Home Depot did not have the information
systems to enable
this change in corporate strategy. Therefore, the company had to modernize its
information systems to improve in
-
store technology.

Another component of Home Depot’s new strategy was to attract younger customers who are
accustomed to shopping online, ofte
n with devices they carry in their pockets or handbags. That
is, the company wanted to increase online transactions. (In 2010, online transactions amounted
to roughly 1.5 percent of Home Depot’s total sales.) Unfortunately, the company’s Web site was
una
ttractive, difficult to navigate, and did not provide for a seamless shopping experience.
Therefore, the company had to improve its site to capture the attention of the numerous
customers who browse online before they go to the store.


The IT Solution


Du
ring fiscal year 2010, which ended on January 30, 2011, Home Depot spent $350 million
on information technology, which amounted to one
-
third of the company’s total capital
expenditures. One of the new IT applications involved mobility. The company spent
$60
million to buy 40,000 handheld devices, called “First Phones,” to replace the old in
-
store
computers. First Phones enable Home Depot associates to manage inventory and help customers
find products. These devices not only act as a phone, but they repla
ce walkie
-
talkies. In addition,
with its credit card reader, the device becomes a mobile cash register. Further, associates can
check inventory in their store and in other stores from any location on the floor.

Home Depot also launched a blogging site on
its Web site where employees answer customer
questions on all home improvement and home construction matters. Further, as part of a broader
upgrade of its checkout systems, the company’s U.S. stores installed contact
-
less scanners for
reading credit card
information on customers’ smart phones.


Chapter

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Wireless Technologies and the Modern Organization

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4
th

edition)

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12


The Results


It is too soon to predict the results of these new policies. Interestingly, Home Depot’s IT
initiatives could be complicated by the preference of most older contractors and do
-
it
-
yourself
homeowners to
buy in person at a store. Home Depot recognizes that the company has to serve
customers the way they want to be served. However, the company feels that over the long run,
customers are going to become much more comfortable using their smart phones on a r
eal
-
time
basis outside or inside the store.


Questions


1.

Provide two specific reasons why Home Depot felt it necessary to deploy wireless handheld
devices.


First, the current system was outdated. The wireless handheld device
, called the “First
Phone,”

was

a logical choice given the current technology. Second, the device helped
improve customer service functions
because employees can use

it
to help customers find
their products.


2.

Identify two potential disadvantages of deploying wireless handhelds at Hom
e Depot.


First, the wireless handheld devices might get lost or stolen. Second, many associates
will need to be retrained to
become
familiar with the new system.


.


Glossary


Bluetooth

Chip technology that enables short
-
range connection (data and voice
)
between wireless devices.


Cellular Telephones

(also called cell phones) Phones that provide two
-
way radio
communications over a cellular network of base stations with seamless
handoffs.


Global Positioning System (GPS)

A wireless system that uses s
atellites to enable users to
determine their position anywhere on earth.


Hotspot

A small geographical perimeter within which a wireless access point
provides service to a number of users.


Infrared

A type of wireless transmission that uses red light not

commonly visible to
human eyes.


Location
-
Based Commerce (l
-
commerce)

Mobile commerce transactions targeted to
individuals in specific locations, at specific times.


Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
13


Mesh Network

A network composed of motes in the physical environment that “wake up”
at
intervals to transmit data to their nearest neighbor mote.


Microwave Transmission

A wireless system that uses microwaves for high
-
volume, long
-
distance, point
-
to
-
point communication.


Mobile Commerce (m
-
commerce)

Electronic commerce transactions that ar
e conducted with a
mobile device.


Mobile Computing

A real
-
time connection between a mobile device and other computing
environments, such as the Internet or an intranet.


Mobile Portal

A portal that aggregates and provides content and services for mobile

users.


Mobile Wallet

A technology that allows users to make purchases with a single click from
their mobile devices.


Near
-
field communications (NFC)


The smallest of the

short
-
range wireless networks
that is designed to be embedded in mobile devices s
uch as cell phones and
credit cards.


Personal Area Network

A computer network used for communication among computer
devices close to one person.


Pervasive Computing (also called ubiquitous computing)

A computer environment
where virtually every object h
as processing power with wireless or wired
connections to a global network.


Propagation Delay

Any delay in communications due to signal transmission time through a
physical medium.


Radio
-
frequency identification (RFID) technology

A wireless technology
that allows
manufacturers to attach tags with antennas and computer chips on goods
and then track their movement through radio signals.


Radio Transmission

Uses radio
-
wave frequencies to send data directly between transmitters
and receivers.


Satellite Ra
dio (also called digital radio)

A wireless system that offers uninterrupted, near
CD
-
quality music that is beamed to your radio from satellites.


Satellite Transmission

A wireless transmission system that uses satellites for broadcast
communications.


Chapter

8:
Wireless Technologies and the Modern Organization

(
4
th

edition)

Page
14


Te
lemetry

The wireless transmission and receipt of data gathered from remote
sensors.


Ubiquitous Computing

(see
Pervasive Computing
)


Ultra
-
wideband (UWB)

A high
-
bandwidth wireless technology with transmission speeds in
excess of 100 Mbps that can be used
for applications such as streaming
multimedia from, say, a personal computer to a television.


Voice Portal

A Web site with an audio interface.


Wireless

Telecommunications in which electromagnetic waves carry the signal
between communicating devices.


wireless 911

911 emergency calls made with wireless devices.


Wireless Access Point

An antenna connecting a mobile device to a wired local area
network.


Wireless Fidelity (Wi
-
Fi)

A set of standards for wireless local area networks based on the
IEEE 802
.11 standard.


Wireless Local Area Network (WLAN)

A computer network in a limited geographical area
that uses wireless transmission for communication.


Wireless Sensor Networks (WSN)

Networks of interconnected, battery
-
powered, wireless
sensors placed in

the physical environment.