IE 419/519 Wireless Networks Lecture Notes #1 Course Introduction.
Transcript of IE 419/519 Wireless Networks Lecture Notes #1 Course Introduction.
IE 419/519Wireless Networks
Lecture Notes #1Course Introduction
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IE 419/519 Personnel Instructor:
Dr. J. David Porter Office 420 Rogers Hall Phone (541) 737-2446 Email
[email protected] Office hours M W 4:00 – 5:30PM
By Appointment
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Textbook Stallings, W.,
Wireless Communications & Networks, 2nd Edition, Prentice Hall, 2005
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Book References Stallings, W., Data & Computer
Communications, 9th Edition, Prentice Hall, 2011
Palmer, R., The Bar Code Book, 5th Edition, Helmer’s Publishing, 2007
Any Visual Basic programming reference book
Any MS Access programming reference book
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IE 419/519 Websites Course’s Web Site
http://classes.engr.oregonstate.edu/mime/winter2013/ie519
Book’s Web Site http://williamstallings.com/WirelessCommunications/
Students are responsible for checking course’s web site on a regular basis for updates Lecture notes will be posted there
PowerPoint format Course Announcements Homework Assignments
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Course Format Lectures
Two sessions per week T Th 10:00 – 11:20AM Rogers 332
Reading Assignments Homework Assignments Midterm Examination Final Examination Term Project
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Course Learning Outcomes All students completing IE 419 or IE 519 should be able to:
1. Understand different types of wireless local area network (WLAN) technologies.
2. Understand the significance that specific layers of the TCP/IP protocol have in wireless communications.
3. Identify the different types of wireless communications protocols contained in the IEEE 802.11 WLAN standard.
4. Identify the most critical antenna design parameters and understand their impact in wireless communications.
5. Understand radio frequency (RF) propagation.6. Understand spread spectrum technology.7. Demonstrate knowledge of concepts related with alternative
wireless technologies such as radio frequency identification (RFID).8. Demonstrate the ability to design and implement a wireless data
collection system.9. Demonstrate the ability to communicate and document technical
information in a professional, structured, timely, and effective manner.
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Grading Criteria Homework 15% Midterm 25% Final Exam 25% Term Project* 35%
A student must attend at least 90% of the lecture sessions to be eligible to receive credit for the term project.
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Course Policies Reading Assignments
Reading assignments are required for ALL lecture sessions
Students are strongly advised to complete these assignments before attending the corresponding lecture
Homework Should be submitted at the beginning of the
class on the day is due Late assignments will not be allowed Must be completed individually, unless
otherwise specified by the instructor
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Course Policies Examinations
Students are expected to take the examinations on the scheduled dates
If a student is unable to attend an exam due to verifiable unforeseeable reasons (e.g., illness, accident, etc.), the instructor will, at his discretion, decide whether to designate a make-up date and time for the examination or to shift the weight of the missed examination to the final exam
Exams will be closed-book and closed-notes The final exam will be cumulative
The Term Project
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When Are Mobile Solutions Appropriate?
When the business currently uses paper forms
When employees need to analyze the information collected at the point of action
When the business suffers from Poor communications between the office, floor,
warehouse, and field Long accounts receivable cycles and/or poor customer
satisfaction
When the business involves inspections, inventory control, auditing, or market research
Great opportunities to improve productivity and efficiency
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Wireless System Architecture
HostAccessPoint
WirelessBar codeScanner
2.- Database system3.- Graphic User Interface
1.- Client Application
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Requirements Identify Candidate Application Domain
Must include at least two sequential processes
Database System MS Access
Graphic User Interface MS Access Visual Basic/Visual C++
Client Application Wavelink Studio
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Term Project Deliverables Project Proposal Weekly Status Report Final Written Report Final Presentation Project Demo Peer Evaluation Project Documentation CD
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Current Process
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R2WProposed Process
Introduction
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Evolution of Wireless Technology Nikola Tesla
Invented radio communications Guglielmo Marconi
Sent telegraphic signals across the Atlantic Ocean
Communications satellites launched in 1960s Advances in wireless technology
Radio, television, mobile telephone, communication satellites
More recently Satellite communications, wireless
networking, cellular technology
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Broadband Wireless Technology Higher data rates achievable with
broadband wireless technology Graphics, video, audio
Shares same advantages of all wireless services
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Wireless Technologies Unlicensed Frequency Spectrum
Industrial, Scientific and Medical (ISM) 915 MHz 2.45 GHz 5.8 GHz
Wireless Fidelity (Wi-Fi) Based on IEEE 802.11 standards Refers to 802.11-compatible products certified as
interoperable by the Wi-Fi Alliance Covers office and home based LANs as well as
hotspots
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Comparison of Wi-Fi Standards
IEEE Standard
Data Rate Frequency Band
Notes
802.11 1 Mbps2 Mbps
2.4 GHz First standard (1997). Used both DSSS & FHSS.
802.11a Up to 54 Mbps
5 GHz Second standard (1999). Products not released until late 2000.
802.11b 5.5 Mbps11 Mbps
2.4 GHz Third standard but second wave of products (1999). Most common.
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Comparison of Wi-Fi Standards
IEEE Standard
Data Rate Frequency Band
Notes
802.11g Up to 54 Mbps
2.4 GHz Standard approved in June 2003.
802.11n Up to 600 MbpsMIMO (multiple input multiple output)
5 GHz and/or 2.4 GHz
Released in 2008. Full approval expected in December 2009.
Next generation?
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Wireless Technologies (cont.)
Unlicensed Frequency Spectrum Unlicensed National Information
Infrastructure (U-NII) U-NII devices do not require licensing Designated to provide short-range, high-speed
wireless networking communication at low cost Three frequency bands (100 MHz each) were set
aside by the FCC in 1997 Objective was to help schools connect to the
Internet without the need for hard wiring
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Wireless Technologies (cont.)
Unlicensed Frequency Spectrum Unlicensed National Information
Infrastructure (U-NII)
Designation
Frequency Band
Maximum Output Power
Use
U-NII-1 5.15 – 5.25GHz 50 mW Indoor only
U-NII-2 5.25 – 5.35 GHz 250 mW Outdoor and indoor
U-NII-2e* 5.47 – 5.725 GHz
250 mW Outdoor and indoor
U-NII-3 5.725 – 5.825 GHz
1 W Outdoor only
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Wireless Technologies (cont.)
Worldwide Interoperability for Microwave Access (WiMAX) Similar to Wi-Fi Range of 40-50 Km
Wireless alternative to cable, DSL, and T1/E1 for last-mile broadband access
Initial developments were in fixed locations but a mobile version was also developed
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Wireless Technologies (cont.)
ZigBee Standard ratified on Dec 9, 2004 Enables reliable, cost-effective, low-power,
wirelessly networked, monitoring and control products based on an open global standard
Targeted to sensors and control devices that do not require high bandwidths but do require low latency and very low power consumption
Initial markets Home control Building Automation Industrial Automation
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Wireless Technologies (cont.)
Ultrawideband According to the FCC, ultrawideband is any radio
technology with a spectrum that occupies greater than 20% of the center frequency or a minimum of 500MHz
An UWB system provides a wireless PAN Data payload communication capabilities of 53.3, 80,
110, 160, 200, 320, 400, and 480 Mb/s Employs orthogonal frequency division multiplexing
(OFDM) Technology specification developed by MultiBand
OFDM Alliance (MBOA) Over 170 member companies
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Limitations and Difficulties Limitations as well as political and
technical difficulties inhibit wireless technologies
Lack of an industry-wide standard Device limitations
Small LCD on a mobile telephone can only display a few lines of text
Browsers of most mobile wireless devices use wireless markup language (WML) instead of HTML
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Standards Organizations National Technical Standard-Setting
Organizations: American National Standards Institute Institute of Electrical and Electronic Engineers, Inc National Institute of Standards and Technology
International Standard-Setting Organizations: International Telecommunication Union International Standards Organization European Telecommunications Standards Institute
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Wireless Technology & Governance
Federal Communications Commission National Telecommunications and
Information Administration Cellular Telecommunications Industry
Association