University of Helsinki Department of Computer Science
 

Department of Computer Science

Department information

 

Papers and presentations


Journal & Conference papers:

IIP Mixture papers:

  • P. Sarolahti, M. Kojo, and K. Raatikainen: F-RTO: An Enhanced Recovery Algorithm for TCP Retransmission Timeouts. ACM Computer Communication Review, Vol 33, No 2, 2003.
    [ pdf ]

  • A. Gurtov: Eliminating Aborted Data Delivery Over Cellular Links. ACM Mobile Computing and Communications Review (Special feature on MOBICOM 2003 posters), 7(4):53-54, October 2003.
    [ pdf ]

  • P. Sarolahti: Congestion Control on Spurious TCP Retransmission Timeouts. In Proc. Globecom'03, San Francisco, USA, December 1-5, 2003.

  • A. Gurtov, S. Floyd: Modeling Wireless Links for Transport Protocols. ACM Computer Communication Review, Vol 33, No 2, 2004.
    [ abstract and pdf ]

  • A. Gurtov, S. Floyd: Resolving Acknowledgment Ambiguity in non-SACK TCP. In Proceedings of the International Conference on NExt Generation Teletraffic and Wired/Wireless Advanced Networking (NEW2AN'04), February 2-6, 2004.
    [ abstract and pdf ]

  • D. Astuti, M. kojo: Evaluating the Behaviour of Peer-to Peer IP Traffic in Wireless Access Networks, 5th International Network Conference, Samos, Greece, July 5-7, 2005.

  • S. Leggio, M. Kojo: On the Efficient Implementation of Instant Messaging Servers for Wireless Users, 3rd Workshop on Applications of Wireless Communications (WAWC'05), Lappeenranta, Finland, August 4, 2005.

  • P. Sarolahti, M. Allman and S. Floyd: Evaluating Quick-Start for TCP. Manuscript, February 2005.
    [ pdf ]

Papers from predecessor projects:

  • P. Sarolahti and A. Kuznetsov. Congestion Control in Linux TCP. In Proceedings of Usenix 2002/Freenix Track, pp. 49--62. Monterey, CA, USA, June 2002.
    [ ps, ps.gz, pdf ]

  • P. Sarolahti, M. Kojo, and K. Raatikainen: F-RTO: A New Recovery Algorithm for TCP Retransmission Timeouts. Technical Report, C-2002-07, Department of Computer Science, University of Helsinki, February 2002. [ ps, pdf ]

  • M. Kojo, A. Gurtov, J. Manner, P. Sarolahti, T. Alanko, and K. Raatikainen. Seawind: a Wireless Network Emulator. In Proceedings of 11th GI/ITG Conference on Measuring, Modelling and and Evaluation of Computer and Communication Systems (MMB 2001), Aachen, Germany, September 11-14, 2001.
    [ ps, ps.gz, pdf ]

  • P. Sarolahti. Performance Evaluation of TCP Enhancements over Slow Wireless Links. FDWP'01, Petrozavodsk, Russia, May 2001. [ ps ]

IETF RFCs and drafts

IIP Mixture Standards contributions:

    S. Floyd, T. Henderson, A. Gurtov, The NewReno Modification to TCP's Fast Recovery Algorithm . RFC 3782, Internet Society, April 2004.
  • J. Manner, M. Kojo (eds), Mobility Related Terminology . RFC 3753, Internet Society, June 2004.

  • Jukka Manner, X. Fu, Analysis of Existing Quality-of-Service Signaling Protocols . RFC 4094, Internet Society, May 2005.

  • P. Sarolahti, M. Kojo Forward RTO-Recovery (F-RTO): An Algorithm for Detecting Spurious Retransmission Timeouts with TCP and the Stream Control Transmission Protocol (SCTP). RFC 4138, August 2005.

  • A. Jain, S. Floyd, M. Allman, P. Sarolahti Quick-Start for TCP and IP . Internet-Draft ( draft-ietf-tsvwg-quickstart-02.txt ), March 2006. (work in progress)

RFCs from predecessor projects:

  • J. Border, M. Kojo, G. Montenegro, J. Griner, Z. Shelby. Performance Enhancing Proxies Intended to Mitigate Link-Relate Degradations. RFC 3135 (Informational), Internet Society, June 2001.

  • S. Dawkins, G. Montenegro, M. Kojo, V. Magret. End-to-end Performance Implications of Slow Links. RFC 3150 (Best Current Practice No: 48), Internet Society, July, 2001.

  • S. Dawkins, G. Montenegro, M. Kojo, V. Magret and N. Vaidya. End-to-end Performance Implications of Links with Errors. . RFC 3155 (Best Current Practice No: 50), Internet Society, August 2001.

  • G. Montenegro, S. Dawkins, M. Kojo, V. Magret and N. Vaidya. Long Thin Networks. RFC 2757 (Informational), Internet Society, January 2000.
     

IIP Mixture Project Reports:

  • A. Gurtov, NS2 Simulation Tests for Modeling Wireless Links. Technical report, December 2003.
    [ ps ]

  • S. Leggio, T. Kulve, O. Riva, J. Saarto, M. Kojo: An Analysis of Instant Messaging and E-mail Access Protocol Behavior in Wireless Environment. Technical Report, March 2004.
    [ pdf (913 kB) ]

  • O. Riva, J. Saarto, M. Kojo: Performance Analysis on HTTP Traffic and Traffic Mixtures with Competing TCP and UDP Flows. Technical Report, May 2004.
    [ pdf (274 kB) ]

  • L. Daniel, M. Kojo: A Simulation Study on TCP Performance with Vertical Handovers in WLAN-GPRS/UMTS Environment, Technical Report, University of Helsinki, Department of Computer Science, June 2005.
    [ ps ]

Theses:

IIP Mixture Project:

  • Andrei Gurtov. Efficient Data Transport in Wireless Overlay Networks . PhD thesis, University of Helsinki, Department of Computer Science, No. A-2004-2, April 2004. (Work partially carried out in the frame of the project)
    [ pdf ]

  • Ilpo Järvinen. Analysis of Heterogeneous IP Traffic in Wireless Environment . Master's Thesis, University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2006-13, February 2006.
    [ ps (3.9 MB), ps.gz (1.0 MB), pdf (1.4 MB) ]

  • Ilpo Järvinen. Analysis of Heterogeneous IP Traffic in Wireless Environment: Full Statistics of the Results . Master's Thesis Supplementary, University of Helsinki, Department of Computer Science, February 2006.
    [ ps (5.2 MB), ps.gz (1.1 MB), pdf (2.4 MB) ]

  • Lauri Hyttinen. Analysis of IMAP Behaviour in Wireless Environment . MSc Thesis, University of Helsinki, Department of Computer Science, To appear.

Theses from predecessor projects:

  • Tuomas Kulve. Analysis of Concurrent TCP and Streaming Traffic Over a Wireless Link. Master's Thesis. University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2003-50, October 2003.
    [ ps (1.4 MB), pdf (1.1 MB) ]

  • Jarno Saarto. WWW traffic performance in wireless environment. Master's Thesis. University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2003-35, May 2003.
    [ ps.gz (1.2 MB), pdf (1.4 MB) ]

  • Oriana Riva. Analysis of Internet Transport Service Performance with Active Queue Management in a QoS-enabled Network. Master's Thesis. Politecnico di Milano, Dipartimento di Elettronica e Informazione, April 2003. The thesis has been carried out in the IIP Wireless project of the University of Helsinki, Department of Computer Science.
    [ pdf (2.1 MB) ]

  • Andrei Gurtov. Efficient Transport in 2.5G3G Wireless Wide Area Networks. PhLic thesis, C-2002-42, Department of Computer Science, University of Helsinki, September 2002.
    [ pdf ]

  • Costa Giovanni. IntServ over DiffServ for IP QoS in radio access networks. Master's Thesis. Universitā di Catania, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni, Catania, July 2002. The thesis has been carried out in the IIP Wireless project of the University of Helsinki, Department of Computer Science.
    [ pdf (5.0 MB) ]

  • Simone Leggio. Context Transfer for Quality of Service in Radio Access Networks. Master's Thesis. Universitā di Catania, Dipartimento di Ingegneria Informatica e delle Telecomunicazioni, Catania, July 2002. The thesis has been carried out in the IIP Wireless project of the University of Helsinki, Department of Computer Science.
    [ pdf (8.1 MB), zip (2.6 MB) ]

  • Andrei Gurtov. TCP Performance in the Presence of Congestion and Corruption Losses. Master's Thesis. University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2000-67. Helsinki, December 2000. [ PS (2 MB), PDF (1 MB) ]

  • Panu Kuhlberg. Effect of Delays and Packet Drops on TCP-based Wireless Data Communication. Master's Thesis. University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2001-7. February 2001.
    [ ps.gz (640 KB), ps (2.5 MB), pdf (1.5 MB) ]

  • Pasi Sarolahti. Performance Analysis of TCP Enhancements for Congested Reliable Wireless Links. Master's Thesis. University of Helsinki, Department of Computer Science, Series of Publications C, No. C-2001-8. February 2001.
    [ ps.gz (469 KB), ps (1.8 MB), pdf (1.2 MB) ]

Presentations & Miscellaneous:

IIP Mixture Presentations:

  • L. Daniel (, M. Kojo and K. Raatikainen). Empirical Study of TCP Slow Start Behavior on High Bandwidth-Delay Product Networks . Fourth Berkeley - Helsinki Ph.D. Student Workshop on Telecommunication Software Architectures, Berkeley, USA, June 21-24, 2004. [ pdf available ]

  • S. Leggio (and M. Kojo). nstant Messaging in Wireless Networks: Guidelines for Efficient Server Implementation . Fourth Berkeley - Helsinki Ph.D. Student Workshop on Telecommunication Software Architectures, Berkeley, USA, June 21-24, 2004. [ pdf available ]

Presentations from predecessor projects:

  • Presentations in IIP Wireless Seminar. May 26th 2003, Nokia Research Center, Helsinki.

  • P. Sarolahti. TCP Enhancements in Linux . Summer School, UC Berkeley, June 2002. [ pdf ]

  • M. Kojo, P. Sarolahti, J. Kyrö and K. Raatikainen: Seawind - A Wireless Network Emulator. Demonstration in the MobiCom 2001 Conference, Rome, Italy, July 16-21, 2001. [ pdf ]

  • M. Kojo. IIP Wireless Project - Overview, TEKES NETS 1a Meeting, March 2003. [ pdf ]


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