CSE5345_Lecture2

CSE5345_Lecture2 - Part I: Basic Knowledge Introduction of...

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1 CSE 5345 – Fundamentals of Wireless Networks Yonghe Liu Yonghe@cse.uta.edu 1/19/12 Part I: Basic Knowledge Introduction of wireless networks Transmission fundamentals Chapters: 1-4 Next: physical layer communication Chapters: 5-8 (antenna, propagation, coding, etc.) Wireless Comes of Age Guglielmo Marconi invented the wireless telegraph in 1896 Communication by encoding alphanumeric characters in analog signal Sent telegraphic signals across the Atlantic Ocean Communications satellites launched in 1960s These days, they are ubiquitous Cell phone, notebook, cordless phone, bluetooth, walkie-talkie, etc. Probably the Most Important Application Voice support through cellphone Cell Phone Spending Surpasses Land Lines By DIBYA SARKAR – Dec 17, 2007 WASHINGTON (AP) — With Americans cutting the cord to their land lines, 2007 is likely to be the first calendar year in which U.S. households spend more on cell phone services, industry and government officials say… Next: Wireless Data Application
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2 Broadband Wireless Technology Higher data rates obtainable Graphics, video, audio Tens of Kbps to Tens of Mbps Shares same advantages of all wireless services: convenience and reduced cost Service can be deployed faster than fixed service No cost of cable plant Service is mobile, deployed almost anywhere Limitations and Difficulties Political difficulty Frequency allocation, WiFi 2.0 Standardization Technical difficulties Bandwidth/Coverage Device limitations • Form factor: e.g., small LCD on a mobile telephone can only displaying limited content • Battery: limited time of activities Security Chapter 2: Transmission Fundamentals Basic overview of transmission topics Data communications concepts Includes techniques of analog and digital data transmission Channel capacity Transmission media Multiplexing Chapter 3: Communication Networks Comparison of basic communication network technologies Circuit switching Packet switching Frame relay ATM SKIP
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3 Chapter 4: Protocols and the TCP/IP Protocol Suite Protocol architecture Overview of TCP/IP Open systems interconnection (OSI) reference model Internetworking SKIP Chapter 2: Transmission Fundamentals Electromagnetic Signal Function of time Can also be expressed as a function of
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CSE5345_Lecture2 - Part I: Basic Knowledge Introduction of...

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