Wireless Use at Carnegie Mellon

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24 Νοε 2013 (πριν από 3 χρόνια και 6 μήνες)

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Wireless Use at Carnegie Mellon

Estimated 1000 Wireless Users

~600 Cards Sold at Computer Store

300+ Cards Donated by Lucent

Significant Unsolicited Feedback

Virtually all Positive

Supporting Research, General Use, and

Research Interest

Original Deployment

Research Network

Supporting Faculty Efforts in

Robotics, Computer Science, Human
Computer Interaction, Electrical and
Computer Engineering, Information
Networking, . . . .

Degree of Interdisciplinary Collaboration
on Campus is Extremely High

Research Projects
(a partial list….)

ARC Group

(Antenna & Radio Communications)
Group; Stancil, et al



Adaptive Mobile & Wireless Networking;



Mobile Information Access; Satyanarayanan


Wearable Computers;




Pervasive Invisible Computing; Reddy, et al


Industry Applications;


Research Issues

Bleeding edge versus production support

Which standard (802.11, Bluetooth); which
version (firmware, drivers, speeds…)

Stable infrastructure; Flexibility/control

Issues of airspace “ownership”

Carnegie Mellon Airspace Policy Guideline


Bottom line

So long as we’re able to
support their needs, faculty are thrilled
we’re running the network

General Interest

Beginning in 1997/98 increasing push to
move from research (best effort) to
production (supported) network

Graduate Business School

laptop program

Faculty & staff from various disciplines

Computing services staff using heavily

Users want email, web access in meetings,
between classes, for group projects, . . .

General Use

Heavy use by students, faculty and staff

Mostly used for basic communication
(email, zephyr, web browsing)

Other “more interesting” uses, ones we
hadn’t envisioned or tested for

Very high convenience factor associated
with ‘anytime, anywhere’ network access

Date: Wednesday, May 03, 2000 3:38 PM

From: "J. Ray Scott" <scott@psc.edu>

To: crb+@andrew.cmu.edu, tf01+@andrew.cmu.edu,

Subject: Wireless

Well, it's a long way from the days of signing up for time on the
teletype pool in Science Hall 5202! My guys were busting for a)
the wireless to be up in this building, b) me to buy them some
PCMCIA cards, and c) the Pittsburgh Spring weather to
cooperate. Today was finally the day when it all came together.

Now, I still need to figure out if we're more productive than
when we had the teletypes. It's an open question! :

J Ray

General Use

General Issues

Competition for attention in meetings

Increasingly used in lieu of traditional
network (at least for some of us)

Mobility & scaling (single subnet now)

Only cost to user is card purchase

promote use, recognize costs, upgrade

Bottom line

As supplement to the wired
network, huge success

Academic Interest

Support lab style use in classrooms

All classrooms w/ projection, video,
network, etc; not all students w/ computer

Enhance communication outside class

Increase interaction between instructor
and students in large courses

Support student software development
projects on mobile computers

Academic Projects


Four classes in Business Administration


“Virtual Cluster” experiment

Department proposed laptop ownership;
but was rejected at university level.

Challenge: find a way to supplement rather
than require laptop ownership

Solution was 30 laptops w/ wireless,
checked out in the 10 minute window
between classes and used in traditional
classroom. And it worked….

Virtual Cluster Evaluation

Student survey (didn’t meet

Checkout (0%
81%); in (0%

Hours (24%

Visio (6%

Email (5%

Web (5%

File/print (0%

95% used in class, 57% for every class;
67% used outside class

Virtual Cluster Evaluation (2)

Faculty feedback (most active: Software
Analysis & Design; used CASE tool in class)

“It was a good pilot. Students were engaged.”

Early bandwidth issues resolved by week 3

“Didn’t try to police them. They know I don’t
relecture so if they miss it, it’s too bad.”

Intent is to repeat (and expand) next year

“I’ll get more creative”

more sophisticated
exercises; collaborative work or exchanging

work across teams

Handheld Andrew Project

Build on wireless & system infrastructure

Enable handheld devices as full peers on
the network; focus on groupware
applications (email, calendar, zephyr)

Funded by a grant, not operating funds

Hardware grants for classroom use

300 HP Jornadas, 300 Lucent cards

Academic Projects


Wireless + Handheld

Modern Chemistry

Lecture course, 100
students; concept test delivered using
Pebbles software (research project)

Rapid Prototyping and Design

project course; student groups developed
applications for handhelds

Information Systems

System design
project course; utilize web
communication tool for teams

Handheld Class Use Evaluation

Student survey (both classes)

20% used daily, another 48% few x/week

75% used concept test, 46% web, 43%
email, 40% games (<10% other uses)

91% classroom, 48% study area, 37%
lounge, 25% cluster; 25% dining, +

43% believe that handhelds will eventually
be used widely in courses; 39% believe
will be useful outside but not in class;
18% not useful at university

Handheld Use Evaluation (2)

Of 91% who used in the classroom:


neither positive or negative impact


impact was exclusively positive


characterized impact as both + and
positive and negative

For the students using concept tests:

96% agree/strongly agree:
concept tests
are a useful part of the lecture

65% a/sa:
liked handhelds for concept tests
because others couldn’t see response

61% yes:

should use next year

Academic Issues

Can be a distraction; no reasonable way to
“shut off” the network access

Mandate only for class (where do notes fit)?

Something else for students to worry about

Bottom line

Students neutral to positive;
faculty go with student assessment. Big
issue is whether we can/should support it
or stop it. Are we just an MP3/browser/
email reader away from seeing 90%
adoption rate?

Final Thoughts


Other Experiences to Relate