Articles 128
Title: History-Based Collision Resolution of CSMA/CA

Speaker: Dongsoo Stephen Kim (Associate Professor of Electrical and Computer Engineering, Purdue School of Engineering and Technology, Indianapolis)

Abstract:
Supporting random access channels, the medium access control (MAC) protocol plays a critical role to the quality of communication channels. The MAC protocol in wireless local area networks (WLAN) and mobile ad-hoc networks (MANET) mainly relies on distributed coordination among mobile stations based on carrier sensing and prioritized inter-frame spacing times. This talk will introduce a novel decision-making scheme of the contention window in wireless communications. The proposed mechanism overcomes the rigidness of existing methods, preventing the useless fluctuation of contention windows, especially when a collision domain contains a large number of competing nodes and a channel noise is non-trivial. The method, namely H-DCF, adjusts the contention windows adaptively and gradually to reflect the current channel state among contending mobile stations. In the paper, we mathematically induces the network performance of the proposed method, which is supported by the extensive study of network simulation. Both analytical and empirical studies show that the method provides considerable benefits in terms of channel throughputs and packet delay.

Short Biography:
Dongsoo S. Kim is currently an Associate Professor of Electrical and Computer Engineering at Indiana Univ. Purdue Univ. Indianapolis.  His research interests includes: mobility modeling, communication networks, mobile ad-hoc networks, sensor networks, switching networks, quality-of-service of data networks, network capacity planning, real-time operating systems.
Dr. Kim is serving as a director of Center for Sensor and Ad Hoc Network at Indiana University, which was initiated as a hub of central Indiana for multi-disciplinary research in wireless communication networks ( www.csan-i.iupui.edu).
He is also serving the Institute of Electronics Engineers of Korea (IEEK), Journal of Ubiquitous Convergence Technology (JUCT) as a Co-Editor-in-Chief.
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List of Articles
No. Subject Date Views
48 J. Yu's paper and J. Kim's one have been accepted to ACM MobiCom'2008 Poster Session. (08/2008) Aug 16, 2008 26630
47 Our NetLab is awarded "KRF Grant" for term 2008 - 2011. (07/2008) Jul 17, 2008 26712
46 Our NetLab is awarded "IITA Grant" for term 2008 - 2011. (06/2008) Jul 17, 2008 26816
45 Prof. Lee received the Best Paper Award in the ICOIN'2008. (01/2008) Mar 10, 2008 48955
44 Prof. Lee has been invited to serve on the TPC of IEEE INFOCOM'2009. (03/2008) Mar 02, 2008 31599
43 K. Kong's paper has been accepted to IEEE Wireless Communications Magazine. (01/2008) Jan 26, 2008 30377
42 Recruiting Contract Professors and Post-Doctors (supported by BK21) Jan 22, 2008 26490
41 BK 연구교수 및 박사후 연구원 (Post-Doc.) 모집 Jan 22, 2008 26698
40 [invited seminar] Prof. Suh, K.-W. (Illinois State U)'s talk (12/26/2007) Dec 31, 2007 26590
39 [invited seminar] Dr. Sung-Ju Lee (HP Labs, USA)'s talk (12/21/2007) Dec 23, 2007 26171
38 [invited seminar] Prof. Hwang, H.-Y. (Hansung U)'s talk (11/01/2007) Dec 03, 2007 41771
37 [invited seminar] Prof. Yeom, Ikjun (KAIST)'s talk (10/26/2007) Oct 31, 2007 26152
36 W. Lee and J. Kim won the grand prize at the 3rd RFID/USN research paper contest (Second Prize Winners). (10/2007) Oct 17, 2007 26154
35 D. Lee's paper has been accepted to IEEE Communications Letters. (10/2007) Oct 09, 2007 26687
34 Prof. Lee has been invited to serve on the TPC of the ACM MobiHoc'2008. (09/2007) Sep 12, 2007 26363
» [invited seminar] Prof. Dongsoo Kim (Indiana U)'s talk (07/23/2007) Jul 30, 2007 26756
32 [invited seminar] Dr. Prasant Mohapatra (UC Davis)'s talk (07/21/2007) Jul 30, 2007 26420
31 Prof. Lee will serve as Publicity Chair in ICOIN'2008. (06/2007) Jul 30, 2007 26467
30 Our NetLab is awarded "KOSEF Grant" for term 2007 - 2010. (05/2007) Jul 30, 2007 26370
29 Prof. Lee has been invited to serve on the TPC of IEEE INFOCOM'2008. (05/2007) Jul 30, 2007 26564