Shammi Wireless

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Wireless Network

Module for CET 592 / ED 492 Wayne Pauli

Dustin Schnabel Eric Schneider


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Schedule

Monday 4-7 12:00to 12:50

KC 122

Tuesday 4-8 12:25to 1:15

KC 122

Wednesday 4-9 12:00to 12:50

CEWL (EH 2)

Thursda 4-10 12:25


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What and Why

Monday and Tuesday will bediscussion on the wireless network,how it came into existence, and why

it is important to DSU

Wednesday and Thursday will behands on days in the CEWL whereyou will actually configure laptopsand PDAs to work on the wireless

network


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Brought to you by


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The CEX

Present Demographics

74 members, representing all fourcolleges

22 members graduating next Month

All with one thing in common, that

being that technology is important, andthat with technology they hope tobecome leaders in their chosen fields ofendeavor


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Value-Added

The CEX takes the approach thatthrough projects, value is added tothe students education.

The application of theories learned inthe classroom are important

The application is technology basedand real-world in nature


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Wireless Network


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Mobile Devices


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Two Years in the Making

2001-2002

$50,000 in specialfunding from

President Tunheim network installed in

East Hall, MundtLibrary, and the TrojanCenter

Purchased 20 laptopsand 20 iPaqs for betatesting

Unveiling of network atthe 2002 CEX

Symposium

2002-2003

$80,000 in line itembudget for the

wireless initiative installation

continued intoKennedy, Beadle,Science Center,Lowry, Heston, DPP,Field House, andCommunity Center

Purchased cart with16 laptops for CEWL


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Why a Wireless Network

The DSU Core Statement states thatwe are the leader in applying computer andinformation systems technology to highereducation.

A competitive advantage

Forward thinking administration

Because we can


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Different Standards

802.11 -- applies to wireless LANs and provides1 or 2 Mbps transmission in the 2.4 GHz band.

802.11a -- an extension to 802.11 that appliesto wireless LANs and provides up to 54 Mbps in

the 5GHz band. 802.11b (also referred to as 802.11 High Rate or

Wi-Fi) -- an extension to 802.11 that applies towireless LANS and provides 11 Mbps transmission(with a fallback to 5.5, 2 and 1 Mbps) in the 2.4

GHz band. 802.11g -- applies to wireless LANs and provides

20+ Mbps in the 2.4 GHz band.
http://www.webopedia.com/TERM/8/Wi_Fi.htmlhttp://www.webopedia.com/TERM/8/Wi_Fi.htmlhttp://www.webopedia.com/TERM/8/Wi_Fi.htmlhttp://www.webopedia.com/TERM/8/Wi_Fi.html


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802.11b

Pros Range

300 ft. in a building

1000 ft. outside

Well accepted standard Low Cost

Availability ofEquipment APs, NICs, &

Accessories

Interoperability 802.11b works with

the new 802.11gequipment

Cons RF Interference

Lower Throughput 1-11 MBit (Up to 22

MBit with specialequipment.)

Only 4 Step-downs


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802.11a

Pros Speed!

54 MBit

Support for highbandwidth applications.

Ex: voice, video, & largeimage files.

Less Interference Standards such as

802.11b & 802.11g are inthe 2.5 GHz band, whichis getting congested.

More End-Users 802.11a APs can handle

more users because ofthe increased throughput.

Cons Cost

Higher cost of equipment.

More equipment needed

Coverage High Bandwidth (5 GHz)

affects range.

Range of 60 ft.

Inoperability 802.11b is already widely

accepted and a operates

on a different frequencythan b & g. They willnot work together.


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802.11g

Pros

Faster

54 MBit

Interoperability Fledgling support

Companies such asCisco, Linksys,Apple, & D-link have

g equipment.

Same advantagesas b.

Cons

No definitestandard yet.

Coming Summer2003

Pre-standardequipment is notguaranteed to

work.


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Things to Keep in Mind

Upcoming g standard

Dual mode equipment

Compatible with both a & b standards


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Options

The only feasible option at the timeof implementation was 802.11b.

Provides 11 Mbps connection over a

2.4 GHz frequency. Was cost effective at the time

because prices started to drop.

Was an established standard thatwas being used in the real world withgood success.


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Why did we choose this

802.11b was the only mature wirelessstandard available.

802.11g and 802.11a were on the horizon

but they were not a feasible option. Choosing to go with 802.11a would have

pushed the project back by at least sixmonths and the 802.11g standard is stillnot finalized.

Feedback from several experiencedsources also had a factor on the decision.


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Installing a WLAN

2002 Gateway Laptops from the CEX

Wireless Lab, Wireless NIC, Cisco APand iPaq


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Steps to Installation

Planning VLAN

Identify Locations for APs Site Surveys

Installation of Equipment Installing clear of interference

Configuring of APs Alternating Channels &

RF Interferance

WEP Key

SSID

Test Installation Net Stumbler


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RF Interference

For 2.4 GHz wireless LANs, there are several sources of interferingsignals, including microwave ovens, wireless phones, Bluetoothenabled devices, and other wireless LANs. The most damaging ofthese are 2.4 GHz wireless phones that people are starting to usein homes and some companies. If one of these phones is in usewithin the same room as an 802.11b wireless LAN, then expectpoor wireless LAN performance.

Microwave ovens operating within 10 feet or so of an access pointor radio-equipped user will generally just cause 802.11bperformance to drop. Bluetooth enabled devices, such as laptopsand PDAs, will also cause performance degradations if operating inclose proximately to 802.11 stations, especially if the 802.11station is relatively far (i.e., low signal levels) from the stationthat it's communicating with. The 802.11 and 802.15 standards

groups, however, are working on a standard that will enable thecoexistence of Bluetooth and 802.11 devices. Other wirelessLANs, such as one that your neighbor may be operating, cancause interference unless you coordinate the selection of 802.11bchannels.


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Alternating Channels

APs set to the same channel mayinterfere or cause cross talk.

In theory only 3 channels are able tobe used: 1, 6, & 11.


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Parts to a Wireless LAN

Network Card (NIC) Radio that attached to computer. Cisco Aironet 350

Access Points Radio equipment that connects to the wireless

network. Cisco Aironet 350 & 1200

Repeaters

Extends the range of wireless network. Bridges

Used to link different sites. Uses line of sight.


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DSUs Wireless Network

Where it is installed

TC / Underground

East Hall

Kennedy Center

Beadle Hall

Science Center

Lowry Hall

Karl Mundt Library


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DSUs WLAN (Cont.)

Field House

Community Center Lobby

All Dorm 1st Floor Lobbies

Placement of APs

Testing


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Security Issues

Devices connecting to the DSUwireless network must have theirMAC address registered with the

school.

Each device must also have the SSIDand the 128 bit WEP key entered.


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From a Students perspective

The Wireless Network means MobileComputing

Every classroom becomes acomputer lab

No waiting for a lab to open in orderto surf

Cutting edge technology


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Present Utilization

2 classes taught inthis environmentduring Fall 02

7 classes beingtaught thissemester

We have even hadan open house thatwas well attended


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DSU Perspective

Curriculum Developed with thefollowing overriding principles:

Curriculum could not deviate greatly

from traditionally delivered sections ofthe same course ( a case of haves vs.have-nots)

Course to be as hands on as possiblegiven the investment of hardware bythe student

Faculty member must be willing to

teach the course in the wireless


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DSU Wireless Network

Spring 2003 Courses in theWireless Lab

ENGL 101 Deana Hueners CSC 206(MOS) Melissa Gioglio

CIS 130 Josh Pauli

CIS 251 Lynette Molstad CIS 375 Tom Halverson

CIS 424 Wayne Pauli (2 sections)


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ENGL 101 English Composition

Anticipated Benefits:

Smaller class size will improvestudent-to-instructor ratio

Mobility of classroom will expand thevariety of learning activities

Flexibility of the learningenvironment and physical size ofequipment will foster increasedstudent participation/interaction


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ENGL 101 English Composition

Spring 2003 Goals

Extend the learning environmentbeyond the classroom via a course

discussion board Take advantage of the flexible nature

of the wireless network by

scheduling activities in remotelocations: Focused research instruction in the Mundt

Library

Focused study of the descriptive mode in theMarketplace


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English 101 Improved Environment

Laptop mobility and size improve learningactivities

Discussion

Students arent hidden behind monitors Instructors have more control over computer

activities and online distractions

Collaboration

Students arent hobbled by stationarycomputers

Students have more desk space to work

Students/instructor confer with ease. Students

make changes to essays immediately during


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English 101 Improved Environment

Laptop mobility allows students to movebeyond the traditional classroom

Students travel to library to conduct

research Students travel to other buildings to

complete interviews

Students travel to student union toconduct student surveys

Students travel outside to do analytical ordescriptive writing exercises


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English 101 Increased Student Interest

Laptops Serve as Equalizers Students uncertain about writing skills find

confidence with technology

Students teach one another computerskills, then writing skills

Reluctant writers demonstrate willingnessto revise and edit when using computers

Students focus research/writing on topicrelevant to themwireless technology andeducation


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English 101 Student Feedback

English 101 students perceptions ofwireless learning are positive overall.

Some students will find distractions in anyclassroom; many students pay attention.

Students understand the direction of thecourse with materials posted to the Web.

Students are more likely to ask questions

via e-mail and/or discussion board. Students enjoy online peer workshops and

conferences.


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English 101 - Challenges

Few students own laptops

Restricts classroom activities

Unlocking and distributing equipment

cuts into class time

Decreases participation in WebBoardactivities outside of class

Equipment malfunctions Games, Internet, IM distract

students


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CSC 105 Intro to Computers

Instructor Findings

Curriculum/Expectations consistentwith other CSC105 sections

Wireless section has highest overallaverage of the 4 sections taught

Students excited and anxious aboutthe use of the new laptops

Students look forward to taking moreclasses offered in the wireless lab


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Instructor Findings

Students appreciate more one-on-one interaction with instructor

Students take pride in being the

Pioneers of using the laptops in awireless environment

Students appreciate the smaller class

sizes Students agree that mobility of the

wireless laptops great benefit


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Instructor Findings

Students develop more troubleshooting skills using the laptops (ex.selecting printers, connecting to H: &

S: drive, etc.) Students have benefit of using

Windows XP vs Windows 2000 tostay on the cutting edge of computersoftware

Several students have invested inpurchasing their own laptops and

several more are going to make the


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CIS 130 Visual Basic Findings

Smaller class size

Students enjoy using the lab duringclass

Less misuse of lab than anticipated

Hands-on during class Follow along with the instructor

Active learning


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CIS 130 Visual Basic Findings

Students have access to class webpage

Assignments are placed in webfolders

Graded and put back in folder

Access to class materials from anylocation

Greater amount of programs arecreated by students


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CIS 251 Wireless Benefits

Smaller class size Better interaction (student/faculty)

Troubleshooting/debugging right at

the computer (prompt feedback) Increased computer lab time

Access to Internet (all class

materials online), share drive, andhome drive

Motivated students

Immediate assessment

Wi l T h l


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Wireless Technology

does not = New Pedagogy

Encourage Contacts Between Studentsand Teacher

Develop Cooperation Among Students andTeacher

Use Active Learning Techniques

Give Prompt Feedback

Emphasize Time on Task Communicate High Expectations

Develop Diverse Talents and Ways ofLearning


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A Wireless Teacher should.

Work with students to represent info in multipleformats

Increase collaborative projects structured aroundproblem solving and analysis

Communicate with students out of class much MORE

Encourage student interaction outside of class

Put all course material online

Receive and return coursework electronically

Provide online practice quizzes and tests

Ask students to generate knowledge content for thecourse

Put lectures in e-formats and focus on interaction

Use video, audio, animation material to illustratecourse concepts


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DSU Wireless Network

Enhanced face-to-face contactfacilities learning

Learning is no longer limited by

space and time Increased capacity for immediate

feedback

Emphasis on lifelong learning Use computers as construction

devices, not just for communication


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THANK YOU FOR

ATTENDING!!!

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