1 / 18

A Brief Summary on Research Activities

A Brief Summary on Research Activities. Cao, Jun Korea University Advisor: Prof. Wonjun Lee 2010.11.07. Contents. Curriculum Vitae Research Summary Master Thesis Other Projects Conclusion. Curriculum Vitae. Family Parents (Beijing, China) Education

jayme
Download Presentation

A Brief Summary on Research Activities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. A Brief Summary on Research Activities Cao, Jun Korea University Advisor: Prof. Wonjun Lee 2010.11.07

  2. Contents • Curriculum Vitae • Research Summary • Master Thesis • Other Projects • Conclusion

  3. Curriculum Vitae • Family Parents (Beijing, China) • Education 2000.09 – 2003.07 Taiyuan No.5 School, Shanxi Province, PRC 2004.03 – 2005.02 Korean language course, Hongik University 2005.03 – 2009.02B.S., Korea University 2009.03 – 2011.02M.S., Korea University • Internship 2007.07 – 2009.02 Network Lab., Korea University 2007.01 – 2007.02 SK Corporation 2006.07 – 2006.08SK Telecom

  4. Curriculum Vitae • Graduate Information Network Lab. Department of Computer Science and Engineering Advisor: Prof. Wonjun Lee • Research topics • IEEE 802.11, WLAN • Wireless Mesh Network • Medium Access Control • Routing in Wireless Ad Hoc Network • Distributed Computing • Master Thesis A simple Distributed Dynamic Set Scheme for Exposed Terminal Problems

  5. Research Summary • Projects 2007.09 – 2009.02 (인턴) • Sponsor: ITRC-HCI,IITA (정보통신연구진흥원) • Topic: Communication protocol for HCI applications 2009.03 – 2010.02 (석사 1년) • Sponsor: KOSEF (한국과학재단) • Topic: Topology control using cooperative communication 2010.03 – 2011.02 (석사 2년) • Sponsor: KRF (한국학술진흥원) • Topic: Packet scheduling in relay assistant networks

  6. 1st Year, Internship • Topic: Communication protocol for HCI applications • Activity: Wireless Mesh Network test-bed construction • Setup Phase • Server • Linux server edition • Embedded router • Routing, Interface • Analysis tools • Traffic generator • Traffic dumping • Testing examples • Routing path selection • Handoff • Channel assignment Wired backbone (for administration purpose) Wireless backbone 802.11a

  7. Master course 1st year • Topic :Topology control using cooperative communication • Cooperative comm. for coverage extension • Disconnected topology in wireless networks ISSUE: How to select the minimal set of links while maximizing connectivity?

  8. Master course 1st year • Solution • Step 1: clustering and selecting headers • Step 2: greedy algorithm to add links until requirement is reached

  9. Master course 2nd year • Topic: Packet Scheduling in Relay Assistant Networks ISSUE How to schedule relays in a balance way? Relay assistant networks • Solution • Each relay is assigned with a relaying probability. • The relaying probability is inverse proportional to • its traffic loadK. • By setting the expect number of relaying to 1, • each relay solve the equation to get R.

  10. Master course 2nd year • Results

  11. Master Thesis • Topic: Spatial reuse and exposed terminal problem ISSUE 1 How to identify exposed terminals in distributed way? ISSUE 2 How to deal with collision?

  12. Master Thesis • Solution • Issue 1: Identifying exposed nodes Exposed nodes dynamically join a dynamic set • Issue 2: handling collision Common time stamp for handling concurrent transmission 2 1

  13. Master Thesis

  14. Master Thesis

  15. Other Projects • Query by humming • Course name: 미디어처리 (4학년) • 구성: 3명 (UI / Signal Processing / Data structure) • *그림인용: http://people.csail.mit.edu/edmond/projects/musicdb/musicdb.pdf

  16. Other Projects A movie • User-rate prediction for movies • Recommendation system • Course name: Algorithm (4학기) • 구성: 2명 K Nearest Node clustering • 17700 movies with user rates • 4400 users Correlation of rates by common users of any two movie.

  17. Other Projects • Results: (Input file) Probe.txt RMSE: 1.29320 RMSE: 1.39235 answer no matrix shrink matrix shrink

  18. Conclusion • Publications • TAs

More Related