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Lecture 1: Introduction

Lecture 1: Introduction. Professor Honggang Wang. http://www.faculty.umassd.edu/honggang.wang/teaching.html Email:hwang1@umassd.edu. Outline. Reasons to take this class Syllabus Course goals Introduction Survey. Three Reasons to Take This Class.

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Lecture 1: Introduction

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  1. Lecture 1: Introduction Professor Honggang Wang. http://www.faculty.umassd.edu/honggang.wang/teaching.html Email:hwang1@umassd.edu

  2. Outline • Reasons to take this class • Syllabus • Course goals • Introduction • Survey

  3. Three Reasons to Take This Class • Wireless networks and mobile computing are everywhere, and changing our world. What is their future? • Tons of job opportunities are available for wireless network engineers in current job market • Includes both lecture and hands-on project design, gain practical experiences

  4. Job Opportunities

  5. Some Network Companies of Top Fortune 500 • Fortune rank:12 • 2008 profit: $8.05 Billion • Avg. pay in that job: $131,703 • Fortune rank:7 • 2008 profit: $12.87 Billion • Fortune rank:16 • 2008 profit: $86.41 Billion • Fortune rank:244 • Avg. pay in that job: $102,030 QUALCOMM

  6. Syllabus • See handout • What to learn? • The fundamental theory • Practical experiences

  7. Class Goals • Understand challenges and opportunities • Learn both fundamentals and applications of wireless networking and mobile computing • Obtain hands-on experiences through research projects (e.g., protocol design, wireless and mobile device development)

  8. Introduction

  9. Goal of Wireless Networks and Mobile Computing “People and their machines should be able toaccess information and communicate with each othereasily and securely, in any medium or combination ofmedia – voice, data, image, video, or multimedia – anytime, anywhere, in a timely, cost-effective way.” Dr. G. H. Heilmeier, Oct 1992

  10. Wireless Networks and Mobile Computing • Two aspects of mobility: • user mobility: users communicate (wireless) “anytime, anywhere, with anyone” • device portability: devices can be connected anytime, anywhere to the network • Wireless vs. mobile Examples  stationary computer  notebook in a hotel   wireless LANs in historic buildings   Personal Digital Assistant (PDA) • The demand for mobile communication creates the need for integration of wireless networks into existing fixed networks: • local area networks: standardization of IEEE 802.11 • Internet: Mobile IP extension of the internet protocol IP • wide area networks: e.g., internetworking of GSM and ISDN, VoIP over WLAN and POTS

  11. Enabling Technologies • Development and deployment of wireless/mobile technology and infrastructure • in-room, in-building, on-campus, in-the-field, MAN, WAN • Miniaturization of computing machinery . . . -> PCs -> laptop -> PDAs/smart phones -> embeddedcomputers/sensors • Improving device capabilities/software development environments, e.g., • andriod: http://code.google.com/android/ • iphone: http://developer.apple.com/iphone/ • windows mobile

  12. Mobile devices • Laptop/Notebook • fully functional • standard applications • Pager • receive only • tiny displays • simple text messages • PDA • graphical displays • character recognition • simplified WWW Sensors, embedded controllers • Smartphone • tiny keyboard • simple versions of standard applications • Mobile phones • voice, data • simple graphical displays www.scatterweb.net performance No clear separation between device types possible (e.g. smart phones, embedded PCs, …)

  13. Mobile and Wireless Services – Always Best Connected UMTS Rel. 5 400 kbit/s LAN 100 Mbit/s, WLAN 54 Mbit/s GSM 53 kbit/s Bluetooth 500 kbit/s LAN, WLAN 780 kbit/s UMTS, DECT 2 Mbit/s GSM/EDGE 135 kbit/s, WLAN 780 kbit/s UMTS Rel. 6 400 kbit/s GSM 115 kbit/s, WLAN 11 Mbit/s

  14. WiFi WiFi 802.11g/n satellite WiFi UWB bluetooth WiFi cellular At Home

  15. On the Move Source: http://www.ece.uah.edu/~jovanov/whrms/

  16. Wearable Health Monitoring Application (ECG) through Wireless Networks • Low cost wireless ECG medical sensor device has been built and tested to trace ECG signal through wireless networks. Then patients can freely walk around while patients can be monitored from anywhere!!! Traditional ECG system Wireless ECG system

  17. Wearable Patient Monitoring Application (ECG) Through Wireless Networks • Wearable Resilient Electrocardiogram (ECG) networked sensor device used for patient monitoring Software GUI interface Wireless ECG medical sensor

  18. On the Road GSM/UMTS, cdmaOne/cdma2000,WLAN, GPS DAB, TETRA, ... ad hoc road condition, weather, location-based services, emergency

  19. Network Network Course Coverage Application Application Transport Transport Network Network Data Link Data Link Data Link Data Link Physical Physical Physical Physical Medium Radio Often we need to implement a function across multiple layers.

  20. Survey

  21. Reference • http://zoo.cs.yale.edu/classes/cs434/schedule.html • Mobile Communication book

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