Java程序辅导

© 2013 Mahbub Hassan, UNSW 
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COMP9336/4336 Mobile Data Networking 
www.cse.unsw.edu.au/~cs9336 or ~cs4336 
Course Introduction 
© 2013 Mahbub Hassan, UNSW 
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Lecture overview 
  Course management 
  Motivation  
  Syllabus 
© 2013 Mahbub Hassan, UNSW 
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Teaching team 
  Lecturer - Mahbub Hassan (www.cse.unsw.edu.au/~mahbub) 
–  Professor of Computer Networks 
–  PhD, MSc, BSc (Computer Science & Engineering) 
–  20 years of teaching & research experience and industry links 
-  Popular books co-authored 
»  High Performance TCP/IP Networking (Prentice Hall, 2004) 
»  Engineering Internet QoS (Artech House, 2002) 
»  TCP/IP over ATM Networks (Artech House, 2000) 
  Lab instructor – Eisa Zarepour 
© 2013 Mahbub Hassan, UNSW 
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Teaching and learning support 
  3-hour lecture per week (weeks 1-12) 
  2 hour laboratory per week (weeks 3-12)  
  Weekly self-assessed homework/tutorial 
–  No formal grading  
  Three hours of consultations per week  
–  Room K17-607 (Mondays 10-12 and Tuesdays 1-2)  
–  one-to-one interaction on FCFS basis (optional) 
  Course website/portal 
–   www.cse.unsw.edu.au/~cs9332 or ~cs4336 
© 2013 Mahbub Hassan, UNSW 
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Pre-requisite/Assumed knowledge 
  COMP9331 / COMP3331  
  Or, introductory networking knowledge 
–  Emphasis on TCP/IP networking 
  Basic programming skills (any language, java 
preferred) 
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Aims and learning objectives 
Explore the concepts, principles, and 
technologies of mobile access to on-line 
data and network services  
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Learning objectives (cont’d) 
  Objective 1: understand theory and concepts of mobile 
devices and networking  
–  Midsession test and final exam 
  Objective 2: learn key algorithms and protocols used 
by mobile devices and networks 
–  Midsession test and final exam  
  Objective 3: explore advanced concepts and protocols 
for managing mobility 
–  Midsession test and final exam  
  Objective 4: learn advanced capabilities of mobile 
devices  
–  Labs and assignment 
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Textbook  
  NO prescribed textbook  
  References (not compulsory) 
–  Mobile communications, 2nd Ed, Addison Wesley, 
2003, Jochen Schiller 
–  Wireless communications, 2nd Ed, Prentice Hall, 
2002, Theodore S. Rappaport 
© 2013 Mahbub Hassan, UNSW 
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Other reading material 
  To be specified for each lecture 
–  white papers 
–  Technical magazine articles 
–  Standard documents (eg IETF RFCs) 
–  Notes from Lecturer 
  Free-of-cost 
© 2013 Mahbub Hassan, UNSW 
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Assessment 
  Mid-session exam: 15 marks 
–  In the lecture (week 6) 
–  Closed book, MCQ, 40 minutes  
–  Negative marking (negative marks for incorrect answers) 
  Assignment: 25 marks 
–  Individual 
–  Smart mobile devices (may involve device programming in Java) 
–  Different options available for PG 
  Laboratory work: 10 marks 
–  During lab hours (Weeks 3-12) 
  Final Exam: 50 marks 
–  End of semester 
–  Open book, 2 hour  
© 2013 Mahbub Hassan, UNSW 
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Laboratory 
  Explore advanced capabilities of smart devices 
–  Sensing, positioning, device-to-device communication, … 
  Android device 
–  Bring your own (BYO) Android device 
–  We have some Galaxy SIII for those who do not have 
access to android device 
  Device programming in Java 
© 2013 Mahbub Hassan, UNSW 
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Final Grade 
  To pass the course, you must get  
–  at least 40% in the final exam (‘Hurdle’), and  
–  a overall 50% (mid-sess+lab+assgn+final exam) 
  You fail automatically if you get less than 
40% in the Final Exam.   
–  maximum mark reported is 40 in this situation 
© 2013 Mahbub Hassan, UNSW 
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Special Consideration 
  Fully documented application is must  
  Each application is scrutinised thoroughly 
  Past performance is considered 
  Common flu, sore throat etc. are not 
considered 
© 2013 Mahbub Hassan, UNSW 
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Supplementary Examination 
  Replaces Final Exam only under exceptional circumstances 
–  cold, flu, immigration, travel, job etc not considered 
–  good grades in mid-sess, lab tests, and assignment 
  No supplementary if you attend and fail final exam 
–  no 2nd chance, sorry! 
  No supplementary for mid-term and lab tests 
© 2013 Mahbub Hassan, UNSW 
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Progress Feedback Opportunities 
  In-session feedback on progress 
–  weekly self-assessed homework – weeks 2-12 
–  Laboratory work – weeks 3-12 
–  mid-session exam – week 6 
–  project assignment – week 13 
  Discuss progress with Lecturer 
–  weekly consultation opportunity (optional) 
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Lecture Overview 
 Course management 
  Motivation 
  Syllabus  
© 2013 Mahbub Hassan, UNSW 
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Advances in 
Mobile Networking 
Convergence in 
Mobile Devices 
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Key Technology Transitions 
1.  Device: PC/laptop  mobile phone 
2.  Service: Voice   non-voice 
3.  Bandwidth: Kilo  Mega  
4.  Processing power: MHz  GHz 
5.  Spectrum: Licensed  license-exempt 
6.  Protocol: Non-IP  all-IP 
7.  Radio: Single interface  multiple interface 
© 2013 Mahbub Hassan, UNSW 
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PC/laptop  mobile phone 
  Mobile phone has outnumbered PCs and laptops 
  Threatening to outnumber world population 
–  Almost everyone has a phone 
  Best way to reach customers is via mobile devices 
© 2013 Mahbub Hassan, UNSW 
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Voice  non-voice 
  Voice (phone call) traffic has saturated 
  Non-voice traffic is growing rapidly 
–  SMS, music download, video/TV, web 
browsing, email, facebook/twitter, … 
  Non-voice dominates use of mobile devices 
© 2013 Mahbub Hassan, UNSW 
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Bandwidth Transition 
Kilo bps  Mega bps 
  Cellular: 9 Kbps (GSM) in ‘99 to 42 Mbps (HSPA+) in ’11, 
90 Mbps LTE in 2013 
  Wifi: 11-54 Mbps 
  Wimax (mainly for non-mobile): 75 Mbps 
  60 GHz (short range, p2p, non-mobile): 1 Gbps wireless!  
  What comes to a desktop, comes to a mobile devices 
© 2013 Mahbub Hassan, UNSW 
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Processor Transition 
MHz  GHZ 
  2007 Dell Inspiron 530s – Dualcore 1.6GHz 
  2013 Samsung S4 – Quadcore 1.6GHz 
Dell Inspiron 530s 
Samsung Galaxy S4 
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Non-IP  all-IP 
  Traditionally, voice traveled over non-IP networks 
  Mobile phones are starting to support TCP/IP 
  VOIP now possible over mobile phone 
–  Skype already launched VOIP service over mobile phone 
  Mobile phones starting to support full TCP/IP stack  
–  SIP-based softphone applications are appearing 
  TCP/IP protocol stack is evolving to support mobility 
–  Dynamic DNS (1997), Mobile IP (2002), SIP (2002), SCTP 
ADDIP Extension (2005), Network Mobility (2005)    
  Mobile devices are full-fledged TCP/IP hosts 
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Single interface  multiple interface 
  Few years ago, mobile phones had only GSM 
  Newest handsets have 6-10 radio interfaces 
–  GSM, Bluetooth, WiFi, WiFi-Direct, HSDPA, LTE, GPS, NFC … 
  Software defined radio on the horizon 
  Connect to as many networks as you like 
  Mobile devices have ubiquitous connectivity 
© 2013 Mahbub Hassan, UNSW 
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Licensed  license-exempt 
  In 18 yrs (1985-2003), 7664.5 MHz spectrum allocated for free use 
–  1985: 2.4-2.4835 GHz and 902-928 MHz (109.5 MHz) 
–  1997: 5.15-5.35 and 5.725-5.825 GHz (300 MHz)  
–  2000: 59-66 GHz aka 60 GHz band (7000 MHz) 
–  2003: 5.470-5.725 GHz (255 MHz) 
  A dramatic ruling in 2006: entire spectrum could be used for free!! 
–  the concept of cognitive radio for dynamic spectrum sharing 
  Mobile communication cost continues to drop 
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CHALLENGES 
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Positioning 
Location will be key for mobile service delivery 
  Greater need for more precision and ubiquitous 
positioning, both indoor and ourdoor 
–  by services e.g. E-911, indoor navigation, …  
  Needs to be energy efficient as well 
–  GPS drains battery fast 
  Many options, but none is highly reliable or energy 
efficient 
–  GPS, WiFi, inertial sensors, … 
© 2013 Mahbub Hassan, UNSW 
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Getting TCP/IP ready for mobility 
  Mobile devices are embracing TCP/IP 
  Is TCP/IP ready for (all types of) mobility? 
  Needs new extensions and designs 
© 2013 Mahbub Hassan, UNSW 
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Device to device communication 
Preventing accidents by exchanging car data 
in real-time (from www.car-to-car.org) 
• Discovering and locating each other 
• Complete transactions while in contact 
• Coordination and interference 
management 
© 2013 Mahbub Hassan, UNSW 
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Powering the Devices 
  Good news: mobile devices are getting more powerful  
–  More hardware and sensors 
–  Faster processors 
–  Larger memory 
–  Faster communications 
  Bad news: we need to supply more power/energy 
–  Form factor restriction means cannot increase battery size 
–  Applications and protocols must be more energy-wise 
© 2013 Mahbub Hassan, UNSW 
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Spectrum Shortage 
  Faster communication needs more spectrum 
  More devices communicating means we need to 
find more spectrum 
  Spectrum is limited by nature 
  Mobile devices need to be more spectrum-wise 
© 2013 Mahbub Hassan, UNSW 
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Lecture Overview 
 Course management 
 Motivation 
  Syllabus  
© 2013 Mahbub Hassan, UNSW 
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Syllabus 
major topics 
1.  Sensors and sensing methodologies  
2.  Device positioning 
3.  Power and energy for mobile devices 
a.  Energy measurement, modeling, and harvesting  
b.  Energy-efficient communication 
4.  Spectrum sensing and sharing 
5.  Device-to-device communication 
6.  Mobility management in TCP/IP stack 
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To sum up 
  Cutting-edge knowledge in mobile device and networking  
  Good mix of theory and practice  
  On-going feedback on learning progress 
  Opportunity to build a real application/system ($500 
industry cash prize for the best work) 
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Student feedback from 2013 
  Very similar structure to this year  
  Overall, I was satisfied with the quality of this course 
–  100% for COMP4336 (School average 82%, Faculty average 86%) 
–  100% for COMP9336 (School average 82%, Faculty average 86%)