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Wireless Communications courses and research at COMNET


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Presentation on Wireless Communications courses and research at COMNET by PRof. Jyri Hämäläinen

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Wireless Communications courses and research at COMNET

  1. 1. Wireless Communications: On the education and research J. Hämäläinen, August 2013 Department of Communications and Networking
  2. 2. Contents • International Master’s Programme in Communications Engineering • Master’s Thesis • Doctoral education • Comnet research
  3. 3. International Master’s Programme in Communications Engineering
  4. 4. The general structure Our focus areas in the following discussion
  5. 5. Master’s Programme in Communications Engineering: The general structure Degree: Master of Science in Technology - Two-year programme (120 ECTS) - Three majors: Networking Technology, Radio Communications, Digital Signal Processing Structure: Six study modules: 1. Basic Module in Communications Engineering (20 cr) 2. Intermediate Module in Communications Engineering (20 cr) 3. Advanced Module in major (20 cr) 4. Methodological Studies (10 cr) 5. Elective Studies (20 cr) 6. Master Thesis (30 cr) In the following we focus on Radio communications major =>>>>>>
  6. 6. Basic module in Radio Communications (20cr) Compulsory courses: In addition at least 5cr is selected from a list of 3 courses This module gives basic understanding on the communications systems from radio communications perspective
  7. 7. Intermediate module in Radio Communications (20cr) Compulsory courses: In addition at least 7cr is selected from a list of 8 courses This module further enhance the understanding on the communications systems from radio communications perspective
  8. 8. Advanced module in Radio Communications (20cr) Compulsory courses: At least 5cr is selected from a list of 7 courses Let us dig in bit deeper on some ideas in this module =>>>>>>
  9. 9. Course contents • Radio Communication Systems I (RCS I) – Contents: Fundamentals of channel modeling, radio system evaluation methodology, general interference models, radio interface protocols and procedures (general level perspective) • Radio Communication Systems II (RCS II) – Contents: Principles and standards of recent mobile communication systems (HSPA, LTE, LTE-Advanced) are considered in details. • Radio Resource and Spectrum Management (RRSM) – Contents: Modeling of interference in wireless networks, interference mitigation and control, spectrum access methods and policies, fairness - performance tradeoff.
  10. 10. Idea behind the studies in this module • RCS I and RRSM: – Goal of the courses is to strengthen the student’s understanding on the radio communication systems and control principles. – Content of the courses is relatively static • RCS II: – The course material is updated almost every year according to progress in technology evolution. – Focus is in most recent/widely deployed communication system(s). This year main focus will be in LTE and LTE- Advanced. Last year focus was on WCDMA/HSPA and LTE – Course is focusing on radio communication principles from standards perspective. Goal: Understanding on theoretical principles, practical systems and standards. Target is also that students can more easily find MSc thesis work from industry
  11. 11. RCS II: Implementation 1/3 • Lectures and exercises – Exercise problems consider both mathematical problems and literature study where publications are used as a reference material • Group assignment – Done in groups of 4-6 students – Consists of: presentation, debate, and report – Each group has assigned instructor (MSc/DSc level teacher) – Topics related to technologies that are recently/currently standardized – Applied material should include both scientific papers and standardization documents
  12. 12. RCS II: Implementation 2/3 Presentation and debate: – Each presentation consists of two parts, and has duration of 30 minutes. – First, 2-3 members of the group (supporters of the technology) give a brief overview of the topic and their findings (10-15 min). – This is followed by a debate (15 min), where the rest of the group takes the role of opponents of the technology that was presented – Audience and teachers may make questions as well.
  13. 13. RCS II: Implementation 3/3 • Report – group prepares a final report related to the presentation topic. The report should have a length of approximately 7-10 pages and form of the report is defined by report guidelines • Grading – The course exam gives a maximum of 30 points • On top of exam points student may get (at maximum) 12 points from the group assignment and 3 points from the exercises. – Out of the 12 points, the teachers will give a maximum of 8 points, and the remaining 4 points will be given based on group peer evaluation • each group member evaluates the work done by the other group members. The peer evaluation will be carried out at the end of the course by e-mail.
  14. 14. Experiences from RCS II • In general experiences has been very good and students have liked the course • Participation to group work should be closely followed. Otherwise 1-2 students in each group may work less than others • Grading is slightly challenging - especially the comparison of group works • Students have been maybe too easily gaining high grades but that has been incentive to attract students to the groups – Course can be optionally carried out individually, then individual assignment needs to be done but no extra points are granted
  15. 15. Methodological (10cr) and elective studies (20cr) Methodological module: Compulsory course At least 5cr is selected from the list that includes mostly math courses Elective studies: Compulsory course In addition, choose any courses to fulfill 20cr module
  16. 16. Master’s thesis
  17. 17. MSc thesis principles • Work load: 30cr (= 6 months work) • Supervised by Aalto professor, instructor must admit at least MSc degree – The purpose of the thesis is to prove that the student has acquired the level of maturity that is required for a higher university degree. – Thus, students are required to prove that they master their majors and the methods of research in their respective fields, and are also capable of carrying out an academic research project in an independent and mature way. 8/20/2013 17
  18. 18. MSc thesis principles • Most thesis works done while working fulltime (either employed or on a scholarship) • The objective is to complete the thesis work in 6 months, – It is not uncommon to finalize the project in eight or nine months. • Thesis options: – Based on needs of businesses and industries (most usual case) • Funding and instructor from the company that orders the work – Based on the needs of the academic community • Funding (in some cases) and instructor from university – Students can also suggest a topic based on their own interests • Not very usual case, thesis done without funding
  19. 19. Typical MSc thesis structure 1. Introduction – Background discussion and setting the research problems, and discussing the importance and justification of the study. 2. Theory – May include required theoretical background, literature study on the topic, and general level system description (example: description of 3G or 4G including the parts needed to understand the thesis problem) These parts of the thesis can be usually written based on textbooks, publications and e.g. standardization documents
  20. 20. Typical MSc thesis structure 3. Description (=what has been done and how) – May include discussion on research methodology, especially in case of simulations and experimental studies. Also specific aspects of the research problem and its potential solutions can be discussed. 4. Presentation of the results and analysis – Student show the results and analyze them carefully. 5. Conclusions – Summary of the results and optionally a discussion on the future research directions These parts contain core part of the student’s own work.
  21. 21. Follow-up • Supervisor: – After defining/accepting the structure supervisor gives for the student a possibility to explain the progress made, which the supervisor can then comment. Supervisor may give guidance on some content issues especially when thesis is done in university research project. – In the end of the process supervisor write the statement on the thesis and proposes the grade – after discussing with instructor. • Instructor: – Main advisor on technical, content and writing issues. Instructor also may support student to achieve high quality presentation, and help student to find relevant references. Instructor may also support student with tools and laboratory arrangements.
  22. 22. Thesis example Osman Yilmaz: Self-Optimization of Coverage and Capacity in LTE using Adaptive Antenna Systems (Nokia Siemens Networks), 2010. Learning the thesis framework: Network self-optimization in LTE Writing of the thesis report. Also two conference papers were done. Now Osman is with Nokia System modeling Performance evaluation
  23. 23. Thesis example Ankit Bhamri: Distributed coding and modulation for 2-hop communication via relays (Eurecom, France), 2010. Writing of the thesis report. Ankit got PhD student position from Eurecom, Fran ce. Understanding LTE and relaying basics. LTE physical layer modeling. Implementation on simulator and HW.
  24. 24. Beneyam Berehanu Haile: Co-channel Interference in Heterogeneous Networks: Rician/Rayleigh Scenario (Comnet), 2010.Thesis example Understanding the system model Creating the mathematical toolbox Deducing the results Showing the results Writing of the thesis report. Beneyam is now a doctoral student in Comnet
  25. 25. Doctoral education
  26. 26. General structure of doctoral studies • Recommended duration: 4 years • Doctoral degree requirements – Theoretical studies (40cr) – Doctoral thesis that is examined by external evaluators and defended in public. – Student should demonstrate independent and critical thinking in relation to their field of research • Theoretical studies are divided into two modules: – Research field (20-35cr) – Scientific practises and principles (5-20cr).
  27. 27. Theoretical studies on the research field • Research field (20-35cr): – Currently in School of Electrical Engineering there are 29 fields (with named responsible professor(s)). – In Comnet there are 5 research fields represented: • Communications Engineering • Network Economics • Information Theory • Networking Technology • Teletraffic Theory • Supervisor of the doctoral student usually is also responsible professor of the research field
  28. 28. Scientific practises and principles • Scientific practises and principles (5-20cr): – The aim is to provide students key characteristics of scientific research and scientific knowledge. Students learn to apply the principles of good scientific practice. – The study module may include studies in research methodology, research ethics and the history or philosophy of science and principles of scientific writing. – Also learning about university practices, such as teaching and guidance of research work, can be included. – The module may include some scientific preparatory tasks related to the research project and presentations in a scientific conference in the research field of the student.
  29. 29. Doctoral thesis • Article dissertation, i.e., several scientific articles, published or accepted for publication, and a summary of these. – In joint papers the contribution of the doctoral candidate should be independent one. – It is not recommend that an article dissertation contains conference papers alone – Extended abstracts (1-2 pages) and papers published in national conferences must not be included in a doctoral dissertation • Monograph: Coherent scientific contribution on the research field. – In practice almost all monographs are based on papers published by candidate. – In case of monograph candidate must specify his or her own contribution to the dissertation – If number of papers on which the monograph is based is small, then the evaluation of a monograph is difficult. Such works require more often corrections and changes which means that the review process becomes longer
  30. 30. Quality control • Doctoral Programme Committee of the School – Approve the research topic and confirm the study plans of doctoral students – Appoint the preliminary examiners for doctoral dissertation – Decide on the permission to publish dissertation manuscript – Appoint the opponent(s) for the defense – Grade dissertation • This is true quality control – There are many cases in which committee has given negative decisions in different phases of the doctoral degree process.
  31. 31. Doctoral thesis: Examples • Ömer Bulakci: ”Backhaul Link Enhancement and Radio Resource Management for Relay Deployments”, 2013 – Main publications: 5 Journal papers and 6 conference papers – Length: 76 pages (the summary part) • Jarno Nousiainen: “Forwarding Capacity in Large Wireless Multihop Networks”, 2013 – Main publications: 1 Journal paper and 7 conference papers – Length: 126 pages (the summary part) • Muhammad Al-Rawi: “Opportunistic Packet Scheduling Algorithms for Beyond 3G Wireless Networks”, 2010 – Monograph, 176 pages – Materials from 1 Journal paper and 6 conference papers included • More dissertations can be found from
  32. 32. Funding and supervision • Most usual sources for funding – University research projects: Mosth usual way of funding – Grants from doctoral programmes: Heavy competition – Work outside the university: Part time students working in e.g. industry (Nokia, Ericsson, operators) – Other grants: Some international students fund their studies from grants they have gained in their home countries – • Supervision – Depends on the supervisor working style and student’s needs. – Typically weekly/biweekly/monthly follow-up meetings where progress is followed, joint publications prepared, project, teaching and other things updated.
  33. 33. Degrees granted 2008 2009 2010 2011 2012 2008 2009 2010 2011 2012 D.Sc. (Tech.) 2 4 7 8 7 Lic.Sc. (Tech.) 3 1 1 2 M.Sc. (Tech.) 81 91 144 68 58
  34. 34. Comnet Research
  35. 35. Grand Challenges Carbon-neutral networking • Sustainable communications • Connecting the remaining 2 billion to mobile and 5 billion to Internet Instant wireless Internet • Wireless access delays below the limit of human perception Scaling the Internet to a thousand devices per user • Internet of things, cyber-physical systems Secure cyber space • Network security, critical infrastructure protection 8/20/2013 Comnet 35 Source: EU FP7 project EARTH Source: NSN Source: Ericsson “Aalto University found a total of 2 915 automation devices in Finland that were accessible to just about anybody through the Internet – and vulnerable to cyber attacks.”
  36. 36. Communications and Information Theory Computational methods in discrete matematics and information theory Prof. Östergård • Mathematical objects (existence and classification problems) • Combinatorial algorithms Advanced Transmission Methods Professors Hämäläinen and Tirkkonen • Space-time codes, • Codeboodk design for MIMO systems • Optimized CQI feedback • Nonlinearity (DirtyRF) 8/20/2013 Comnet 36 libexact package Beamforming codebooks based on Grassmannian Packings
  37. 37. Advanced Radio Communication Systems (1/2) Professors Hämäläinen, Jäntti and Tirkkonen Cognitive radio and spectrum aware communications • Co-primary and secondary sharing • Overlay (black space) and underlay (D2D) transmissions • Interference modeling and control Wireless broadband systems and system optimization • HETNETS and deployable networks • Small cells, relays • Self-organization & self-optimization • RRM • Energy efficiency 8/20/2013 Comnet 37 Cognitive radio network testbed TVWS Assesment tool 3GPP compliant simulation tools
  38. 38. Advanced Radio Communication Systems (2/2) Wireless Sensor Systems Professors Jäntti and Ott • Real-time sensing • HW & SW Architectures • Development and testing tools • Protocols • IoT, automation, and military applications • RF tomographic imaging and Device Free Localization (DFL) 8/20/2013 Comnet 38 Software Model LowLevel Automated Daemons Middleware Application Level Comm.Stack RTOS - APIsPeripheral Drivers Power Manager “Time SYNC”er Device Abstraction APIs Sys Monitoring Comm. Drivers Application Transport Network MAC PHY pRoot node and middeware DFL System
  39. 39. Performance analysis and teletraffic theory Queuing theory and teletraffic theory Prof. Aalto • Age and size based scheduling • Dispatching problems • Flow level performance analysis • Internet traffic engineering • P2P, wireless networks, M2M communications,… Performance measurements Prof. Manner • Energy-consumption measurements • Experimental data center • Internet traffic measurements • Mobile access speed measurement service: Netradar ( 8/20/2013 Comnet 39 Comnet data center Size- and state aware dispatching Netradar
  40. 40. Internet technologies (1/2) Professors Kantola, Manner, and Ott Networking technology • Carrier grade Ethernet • Access and core networks • Software defined networking (OpenFlow) • Energy efficient communications and networking Network security and trust • Internet wide trust / Evolution of cooperation • Customer edge switching • Cyber security: Security of critical infrastructure 8/20/2013 Comnet 40 Control place for Carrier-Grade Ethernet Network Analysis of Cyber weapons and attacks
  41. 41. Internet technologies (2/2) Internet protocols • End-to-end transport, multipath transport, flow and congestion control • Customer Edge Traversal • Transport layer cognitivity • Opportunistic Networking • DTN routing, transport, and application protocols • P2P • Content-based networking • Multimedia protocols • Energy efficient operation • IETF standardization Military communications • Tacoms - Tactical Communications for Federated Network Environment • Generic messaging protocol (MICS) 8/20/2013 Comnet 41 The ONE simulator for Opportunisti Networking Proxies for Energy-Efficient Web Access
  42. 42. Network Economics Prof. Hämmäinen Quantitative analysis of mobile user behavior • Challenging the boundaries of complex data mining, privacy • Understand the behavior in context, social activity and service adaption/diffusion Optimal industry and technical architecture for flexible radio access • Enable flexible spectrum use: Technical, regulatory and economic rules Techno-economic bottlenecks of Internet scalability • Identify and eliminate techno-economical bottlenecks preventing the scaling of Internet 8/20/2013 Comnet 42 Spectrum regulation phase diagram Contextual patterns in mobile service usage
  43. 43. Publications 8/20/2013 Comnet 43 0 20 40 60 80 100 120 140 160 180 200 90 141 143 170 186 All publications 2008 2009 2010 2011 2012 0 20 40 60 27 32 33 53 60 Journal articles 2008 2009 2010 2011 2012
  44. 44. Advanced Radio Communications Research Group • ~ 6 D.Sc. level researchers • 20-25 Doctoral students • Variable number of M.Sc. thesis workers Jyri Riku Olav Profs:
  45. 45. Some research partners (with whom we have joint publications and/or research projects) • Colleagues in Aalto • University of Oulu • Tampere University of Technology • VTT • Nokia Siemens Networks (Germany, Finland, Denmark, C hina) • Nokia Research Center • Renesas Mobile • Ericsson Research • Huawei Technologies • Royal Institute of Technology KTH (Sweden) • University of California at Davis (USA) • Yonsei University (Korea) • Beijing University of Posts and Telecommunications (China) • Peking University (China) • Worchester Polytechnic Institute (USA) • UPC, Barcelona • Texas A&M (USA) • National University of Cordoba (Argentina) • Aalborg University
  46. 46. Questions?