shammi wireless
TRANSCRIPT
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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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CSC 105 Intro to Computers
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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CSC 105 Intro to Computers
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!!!