An Agent Architecture for Strategy-Centric Adaptive QoS Control in Flexible Videoconference System

  • Takuo Suganuma
  • SungDoke Lee
  • Takuji Karahashi
  • Tetsuo Kinoshita
  • Norio Shiratori
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1733)


In this paper, we propose an agent architecture to improve flexibility of a videoconference system with strategy-centric adaptive QoS (Quality of Service) control mechanism. The proposed architecture realizes more flexibility by changing their QoS control strategies dynamically. To switch the strategies, system considers the properties of problems occurred on QoS and status of problem solving process. This architecture is introduced as a part of knowledge base of agent that deals with cooperation between software module of videoconference systems. We have implemented the mechanism, and our prototype system shows its capability of flexible problem solving against the QoS degradation, along with other possible problems within the given time limitation. Thus we confirmed that the proposed architecture can improve its flexibility of a videoconference system compare to traditional systems.


User Requirement Knowledge Activator Agent Architecture Videoconference System Protocol Machine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S. MaCanne and V. Jacobson, “Vic: a flexible framework for packet video”, ACM Multimedia, pp.511–522, Nov. 1995. 226, 227Google Scholar
  2. 2.
    T. Turletti and C. Huitema, “Videoconferencing on the Internet”, IEEE/ACM Trans. on Networking, Vol.4, No.3, pp.340–351, 1996. 226, 229CrossRefGoogle Scholar
  3. 3.
    V. Jacobson and S. McCanne, “Visual Audio Tool”, Lawrence Berkeley Laboratory,
  4. 4.
    V. Jacobson and S. McCanne, “LBL whiteboard”, Lawrence Berkeley Laboratory, 226, 227
  5. 5.
    T. Suganuma, S. Fujita, K. Sugawara, T. Kinoshita, and N. Shiratori, “Flexible Videoconference System Based on Multiagent-based Architecture”, Trans. IPSJapan, Vol.38, No.6, pp.1214–1224, 1997. (Japanese) 226, 227, 228Google Scholar
  6. 6.
    T. Suganuma, T. Kinoshita, K. Sugawara, and N. Shiratori, “Flexible Videoconference System based on ADIPS Framework”, Proc. of the 3rd International Conference and Exhibition on the Practical Application of Intelligent Agents and Multi-Agent Technology(PAAM98), pp.83–100, 1998.Google Scholar
  7. 7.
    T. Suganuma, T. Kinoshita, K. Sugawara, and N. Shiratori, “Cooperation Protocols for Multimedia Communication Network based on ADIPS Framework”, Proc. of the 1998 International Conference on Parallel Processing (ICPP98) Workshop on Flexible Communication Systems, pp.76–85, 1998. 226, 227Google Scholar
  8. 8.
    N. Shiratori, K. Sugawara, T. Kinoshita, and G. Chakraborty, “Flexible Networks: Basic Concepts and Architecture”, IEICE Trans. Commun., Vol.E77-B, No.11, pp.1287–1294, 1994. 226, 227Google Scholar
  9. 9.
    N. Shiratori, T. Suganuma, S. Sugiura, G. Chakraborty, K. Sugawara, T. Kinoshita, and E.S. Lee, “Framework of a flexible computer communication network”, Computer Communications, Vol.19, pp.1268–1275, 1996. 226CrossRefGoogle Scholar
  10. 10.
    S. Fujita, H. Hara, K. Sugawara, T. Kinoshita, and N. Shiratori, “Agent-based design model of adaptive distributed systems”, Applied Intelligence, Vol.9, No.1, pp.57–70, July/Aug. 1998. 227, 233CrossRefGoogle Scholar
  11. 11.
    T. Kinoshita and K. Sugawara, “ADIPS Framework for Flexible Distributed Systems”, Springer-Verlag Lecture Notes in AI, Vol.1599, pp.18–32, 1998. 227, 233Google Scholar
  12. 12.
    J. Bolliger and T. Gross, “A Framework-Based Approach to the Development of Network-Aware Applications”, IEEE Trans. on Software Engineering, Vol.24, No.5, 1998. 229Google Scholar
  13. 13.
    T. Karahashi, M. Katsukura, T. Suganuma, K. Sugawara, T. Kinoshita, and N. Shiratori, “Extension of Cooperation Protocol for a Flexible Videoconference System”, Proc. of 12th International Conference on Information Networking(ICOIN-12), pp.34–37, 1998. 232Google Scholar
  14. 14.
    J. K. Ousterhout, “Tcl and the Tk Toolkit”, Addison-Wesley, 1994. 233Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • Takuo Suganuma
    • 1
  • SungDoke Lee
    • 1
  • Takuji Karahashi
    • 1
  • Tetsuo Kinoshita
    • 1
  • Norio Shiratori
    • 1
  1. 1.Research Institute of Electrical Communication / Graduate School of Information SciencesTohoku UniversityJapan

Personalised recommendations