Lecture 1: October 4, 2004 Prof. Maria Papadopouli [email protected]
description
Transcript of Lecture 1: October 4, 2004 Prof. Maria Papadopouli [email protected]
Lecture 1: October 4, 2004
Prof. Maria Papadopouli
CS 436-Fall 2004: Wireless Networks & Mobile Computing
Roadmap
Short bio & statement Pervasive computing introduction
Definition Pervasive computing systems
Aura Sensors Telematics Smart homes
Seminar mechanics
B.Sc. Department of Computer Science, University of Crete M.Sc. Department of Computer Science, New York University Ph.D. Department of Computer Science, Columbia University
Several summer internships at T.J. Watson Research Lab, IBM, 2002 - Assistant Professor, Department of Computer Science, University of North Carolina at Chapel Hill
2003/2004 & 2004/2005 The IBM Faculty Award 2004 - Assistant Professor, Department of Computer Science,
University of Crete
Short Bio
University of Crete
A brief personal note
Collaborations of the Mobile Computing Group
Why I am excited with this seminar
Great research area! Pervasive computing Wireless measurements (IBM Faculty Award, 2003/2004
and 2004/2005) Location-sensing Mobile computing applications
Collaborating with UoC students Experimenting with cutting-edge technologies
The Wireless Century
19th century: invention of the telegraph, telephone
20th century: radio, television, computers 21th century: the second Information Age
Wireless Century of Pervasive Computing
Pervasive Computing
“ The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it." Mark Weiser, 1991
Pervasive computing is the method of enhancing computer use by making many computers available throughout the physical environment, but making them effectively invisible to the user.
Weiser’s Vision
The essence of that vision was the creation of environments saturated with computing and communication capability, yet
gracefully integrated with human users
After a decade of hardware progress, many critical elements of pervasive computing that were exotic in 1991 are now viable commercial products: handheld and wearable computers, wireless LANs, and devices to sense and control appliances.
We are now well positioned to begin the quest for Weiser's vision.
Research in Pervasive Computing
The most precious resource in a computer system is no longer its processor, memory, disk or network. Rather, it is a resource not subject to Moore's law:
User Attention
Today's systems distract a user in many explicit and implicit ways,
thereby reducing his effectiveness. [Satya from CMU]
Aura Project @ CMU
http://www-2.cs.cmu.edu/~aura/Satya
'Robot Tarzan' helps forest work
•Uses distributed sensors to acquire informationabout the environment (changes in light, humidity,carbon dioxide levels)
• Gives scientists crucial indications & predictions about environmental change
•Monitors plants (and even leaves!) over time usingspectrographic imaging
•Has its own server & communicates with other devices & sensors
•Goes to specific locations of interest and takes samples or analyzes particular areas
About Treebot from UCLA
http://news.bbc.co.uk/1/hi/technology/3340057.stm
More info about sensors http://www.cens.ucla.edu/
Kaiser Estrin
Research in Sensor Networks
Design and deployment of long-lived self-configuring Embedded Networked Sensing (ENS) systems
Research spanning the spectrum from a study of fundamental properties and algorithms to implementation of practical systems and testbeds
Development of a comprehensive understanding of how to systematically design, run, and manage ENS systems.
ENS systems are characterized by energy constraints, irregular configurations, time-varying topology, large scale and changing applications
Sensors for global warming studies
• Sensors embedded probes into the largest ice cap on mainland Europe (Jostedalsbreen, Norway)
• Use of glacial activity to trace current global warming patterns & predict future climate changes
Sensor nodes: motes
Signals at 902MHz over 40 feet at 19.2Kbps Small devices 1.2’’x1.1’’ Its transmitters use 1,000 times less power of cellular
phones Dust networks, wireless base stations, very small,
powered by AA batteries
Wearable computing
www.bodymedia.com
UNC tracker
http://www.cs.unc.edu/~tracker/index.html
ceiling panels housing LEDs
miniature camera cluster
sub-millimeter position accuracy and resolution
Virtual Reality vs. Augmented Reality vs. Pervasive Computing
Wired vs. Wireless access
USB Ethernet
DSL
UWB IEEE802.11b 11Mbps, 2.4GHz
IEEE802.11a 54Mbps, 5GHz IEEE802.16 40Mbps per channel,
10-66GHz
3-10km mile range
Mobile networks with 15Mbps in a cell
Cell phone extended as a remote control
Wireless wallpaper (made by kapto): isolates wireless LAN, let’s cellular out in a british aerospace company
New DoCoMo phone lets you unlock doors, buy sodas, …
90’s told us that content matters a lot!
NTT DOCOMO
• A Radio Frequency Identification (RFID) tag is a small sophisticated radiotransmitter with a transmission radius of approximately 10 m• Transmits the tag's identification signal at regular intervals• Allows the user to transmit the ID signal at will.
• Utilizing RFID tags with mobile phones or other communication devices make it possible to provide location, time, and other useful information tailored to individual user needs.
http://www.nttdocomo.com/corebiz/ubiquity/roppongi.html
Telematics
•Entertainment•Useful information•Contribution to safety (e.g.,Teleaid, Telediagnosis)
•Microprocessors, display, voice recognition
•Telematic services by the end of 2006:90% of all luxury cars will offer telematic services & 50% of all carsExamples: “OnStar”, “UConnect” bluetooth-enabled car kit
Telematics (cont’d)
Within Germany, over 4,000 motorway sensors nationwide gather data non-stop, enabling the system to inform motorists of all developments as they happen.
The navigation system offers a suitable alternative route immediately if a traffic jam is reported.
Home Smart Home
Memory aids: where did I put that bill ? Remote control for appliances e.g., gesture pendant that recognizes and translates gestures
Context aware computing challenges How you define context ? Detection of false positives ?
Benchmarking ?
http://www.cc.gatech.edu/fce/ahri/projects/index.html
Seminar Topics
Wireless data access IEEE 802.11, bluetooth, and other wireless technologies Mobile peer-to-peer systems Location-sensing systems Location-dependent services Energy measurements & conservation Measurements on wireless networks Routing protocols for mobile devices Sensor networks Security issues on wireless access
Class Mechanics:
Q: Is a seminar just like a course ?
NO ! Several students presentations No final exams Research paper or system implementation Great opportunity to find interesting research projects,
prepare B.Sc. Thesis, learn about graduate studies, summer internships, and experiment with new technology,
Seminars & Meetings
Lectures: Monday: 5-7 RA201 Tuesday: 3-5 GO18
Office hours: Monday: 7-8 (subject to change) Meet with each group in individual basis (TBA) Meet with TA
Participation in the Mobile Computing Group meetings (TBA) Send me an email and will include you in the [email protected]
Seminar Information On-Line
Web page: http://www.csd.uoc. gr/~hy436
Email list: [email protected]
To subscribe: 1. send an email to [email protected] without any subject and
with body text : subscribe hy436-list
2. a confirmation email should come back to you
Textbooks
802.11 Wireless Networks, The definitive guide. Matthew S. Gast, O'Reilly, 2002, ISBN 0-596-00183-5
802.11 Wireless LAN Fundamentals: a practical guide to understanding, designing, and operating 802.11WLANS, Roshan, Leary, CiscoPress.com
Reading material at the course web page
Additional Textbooks (not required)
Ad Hoc Networking. Charles E. Perkins, Addison Wesley, 2001, ISBN 0-20130976-9
Computer Networking A Top-Down Approach Featuring the Internet. James F. Kurose and Keith W. Ross, Addison Wesley, 2002, ISBN 0-201-477114
Wireless Communications Principles and Practice. Theodore S. Rappaport, Prentice Hall (Second Edition), ISBN 0-13-042232-0
TAs info
TA contact details Manolis Spanakis [email protected]
Grading
Project assignment 40% Presentations 40% (4 paper presentations) Final demo/presentation 10% Log and participation in the class 10%
Evaluation at the end of each presentation
Mid-term evaluation of your project
Resources & infrastructure
PCMCIA cards (IEEE802.11b, bluetooth), laptops, PDAs, GPS, IEEE802.11b APs, wireless camera, sensors
Sophisticated infrastructure for monitoring of the wireless infrastructure (more than 500 wireless APs)
Lots of wireless measurement traces ready for analysis Technical books Contacts with mobile computing researchers from all over
the world