1. CSE 709 Selected Topics in Cellular Networking Dimitrios Koutsonikolas January 27, 2016 http://www.cse.buffalo.edu/faculty/dimitrio/courses/cse709_s16/index.html

2. Instructor http://www.cse.buffalo.edu/faculty/dimitrio/http://www.cse.buffalo.edu/faculty/dimitrio/ Assistant Professor, CSE Research interests: experimental wireless/mobile networks and systems Office: 311 Davis Hall Office hours: Tuesday 11:00-12:00, or by appointment (use email) Email: dimitrio@buffalo.edudimitrio@buffalo.edu 2

3. Time and Location Lectures – Wednesday, 5:00-7:30 PM, Davis 113 Presentation preparation meetings – Tuesday, 11:00-12:00, Davis 311 – More on this later 3

4. Important URLs Course website (notes, slides, etc.) http://www.cse.buffalo.edu/faculty/dimitrio/courses/cse709_s16/index.html Piazza (questions, discussions, announcements) https://piazza.com/buffalo/spring2016/cse709/home 4

5. Course Overview A selection of topics in cellular networking Systems/practical perspective Mix of current practice and advanced research 5

6. Topics 3G/4G performance and energy consumption Cross-layer interactions Control plane interaction Mobile data charging WiFi offloading Multipath TCP Congestion Bandwidth estimation … 6

7. Course Objectives Learn state-of-the-art in cellular networking Discuss challenges and opportunities in cellular networking research Identify open research problems for further study (for interested students) Learn/practice 2 essential skills of doing research – How to read/review a research paper – How to present a research paper 7

8. Prerequisites Strong background in computer/wireless networking – CSE 589 or CSE 630 or equivalent If you haven’t taken any of the prerequisites, arrange for a meeting with me this week! Send me email including – Brief description of your relevant background – Why you want to take this seminar 8

9. Course Workload Read papers Write paper reviews Present 1 paper Present 1 related work summary (3 credits) Participate in class discussions 9

10. Class Format Discuss one topic each week – Mandatory paper (everyone reads before class!) – Optional papers One student presents mandatory paper for 1- 1.5 hours Another student summarizes optional papers and leads topic discussion for remaining 1 hour 10

11. (Tentative) Grading 1 credit Paper presentation: 45% Paper reviews (3): 30% Class participation: 30% – Discussions: 20% – Classmate evaluation: 10% – No credit for simply showing up! 3 credits Paper presentation: 25% Related work survey: 20% Paper reviews (5): 30% Class participation: 30% – Discussions: 20% – Classmate evaluation: 10% – No credit for simply showing up! 11 The final grade is S/U. To receive an S grade, you have to score at least 70%

12. Reading Papers 11 mandatory papers – Everyone has to read Recommended reading: “How to Read a paper”, S. Keshav 3-pass approach 12

13. The 3-Pass Approach Pass 1: the 5 C’s – Category – Context – Correctness – Contribution – Clarity Pass 2: identify key points Pass 3: virtually recreate the paper 13

14. Writing Reviews I Format on the website 14 1.Contributions (What are the major issues addressed in the paper? Do you consider them important? Comment on the novelty, creativity, and technical depth of the paper.) 2.Briefly summarize the main ideas/the approach to the solution. 3.What are the paper's strengths? Be brief. 4.What are the paper's weaknesses? Be brief. 5.Comment on the paper's evaluation methodology. 6.Are there any issues/directions this work left open? List a few possible extensions of this work. 7.Any other comments/questions.

15. Writing Reviews II Email the reviews to me by 08:59am on Wednesdays! – txt only – Late reviews will not be accepted! You have to submit 3/5 reviews (your choice) – You cannot choose the papers you are presenting Will post best 2-3 reviews every time online NO CHEATING!!!!! 15

16. Review Grading 2 points = excellent – Typically top 2-3 reviews 1.5 points = good 1 point = OK – Limited depth/creativity, did not answer 1-2 questions 0.5 points = have to try harder! Final score multiplied x5 (1 credit) or x3 (3 credits) You can submit more than 3/5 reviews, the 3/5 best will count 16

17. Paper Presentations Prepare power point/pdf slides Lead discussion for around 1-1.5 hours – 60 min talk + questions/discussions OK to use other people’s slides but – Acknowledge them!!! – Adapt them A conference talk is different from a seminar talk! 17

18. Paper Presentations II To better prepare for the presentation – Read presentation guidelines http://www.cse.buffalo.edu/faculty/dimitrio/courses/cse709_s16/material/guidelines.html http://www.cse.buffalo.edu/faculty/dimitrio/courses/cse709_s16/material/guidelines.html – Answer talk preparation questions (email them to me 7 days before your presentation) – Schedule a meeting with me the week before your presentation – During my officer hours (T, 11:00-12:00) Send me your slides before the meeting 18

19. Talk Preparation Questions I A. Analyze the paper – What is the problem? – What is the motivation? – Required background/context – Paper’s key points – Experimental methods/design – Most important results. Any unexpected results? – Authors’ conclusions. – Implications, impact on future work – Any weaknesses? 19

20. Talk Preparation Questions II B. Adapt paper for your audience – Why should the audience be interested in this topic? – What do they already know? – What terms/definitions will be new? – Which key points/definitions will be most difficult to grasp? 20

21. Presentation Guidelines Rule 0: Understand the paper, identify key points, think how to adapt for audience Rule 1: Have a slide very early on that states the key points of the paper Rule 2: Structure rest of talk around key points Rule 3: Explain purpose of experiments, experimental setup, results, conclusions drawn Rule 4: Two parts in your talk – 1 st part: present paper as author – 2 nd part: your critique 21

22. Presentation Guidelines (Slides) Rule 5: Use a big letter size! Rule 6: Do not clutter your slides! Rule 7: Pictures are almost always better than text Rule 8: A slide should never try to convey more than a single concept 22

23. Presentation Guidelines (Preparation) Rule 9: Do at least a couple of dry-runs Rule 10: Think of possible questions, prepare back-up slides Rule 11: To memorize or not? – Memorizing the first few slides often helps… 23

24. Presentation Guidelines (On the Stage) Rule 12: Make it look like you are having a good time Rule 13: Make sure the audience can always see the screen Rule 14: Do not try too hard to be funny Rule 15: Maintain eye contact with the audience Presentation evaluation – Done by classmates! – Counts towards class participation! 24

25. Peer evaluations After each paper presentation – Fill in the form at the end of each class – I will send a summary to presenter(s) along with my evaluation – Presenter does not see who wrote what – No offensive comments! Your evaluations do not affect the grade of the presenters! – Be honest! Your evaluations affect your grade! – Take them seriously! 25

26. How Do I Describe a Graph? It is the presenter’s task to explain the graph and the conclusions drawn to the audience! Describe x, y axis Describe points, lines, bars, error bars, etc. Describe conclusions 26

27. How Do I Describe a Graph? 27 Offered Load (Mbps) Throughput (Mbps) Protocol A Protocol B

28. Related Work Survey Summarize 2-4 papers – Optional papers in reading list – Any other relevant paper you find (but ask me first!) Use slides (highly recommended) – Only main ideas, no details Lead discussion on topic of the week Discuss with presenter of mandatory paper 28

29. Class Participation Very important!!! Attend classes, participate in discussions (in class and online), express your opinion, ask questions Be critical – No paper is perfect! Be creative – Think of alternative solutions/possible extensions Feel free to share ideas, questions, articles on cellular networking etc. on piazza 29

30. Academic Integrity No tolerance on cheating/plagiarism!!! – 0 in the particular assignment on 1 st attempt – Fail the course, report to the department on 2 nd – Consult the University Statements on Academic Integrity: http://www.cse.buffalo.edu/shared/policies/academic.php. http://www.cse.buffalo.edu/shared/policies/academic.php Students who share the work with others are as responsible for academic dishonesty as those receiving the material 30

31. Academic Integrity II Paper presentations – You can use any material found online (except past CSE 630/701/708 slides) as long as you acknowledge them – E.g., in your last slide: “Many slides were borrowed from …”, or use footnotes in each slide Paper reviews – You cannot use any online material! – Reading/discussing papers in groups is encouraged – The reviews have to be written individually!!! – A zero grade due to cheating will be included in the list of graded reviews! – A second zero = fail the course 31

32. Assignment 0 Read “How to Read a Paper” Decide whether you are staying or not Pick up your preferred topics – 1 st and 2 nd choice for presentation – 1 st and 2 nd choice for related work (have to be different from presentation topics) – Post your choices on piazza by Friday – FCFS – check piazza before you choose – We need volunteers for the first topic 32

33. Questions? 33