FreeSpeech: A Novel Wireless Approach for Conference Projecting and Cooperating

  • Wenbin Jiang
  • Hai Jin
  • Zhiyuan Shao
  • Qiwei Ye
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4159)


This paper presents a novel wireless projecting and cooperating approach named FreeSpeech based on Ad Hoc network, which makes conference exchange more convenient and ubiquitous. All attendees can access this system by their laptops or other mobile computing devices all around the conference venue and make the projections of their presentations without connecting to the projector physically. Moreover, they can make cooperative display simultaneously with others. FreeSpeech takes a mixed Virtual Networking Computing (VNC) C/S mode based on some improvements on the traditional ones. A novel IP multicast-based transfer and control mechanism is presented to make large numbers of attendees obtain the wall screen contents by their laptops locally without aggravating the overhead of bandwidth remarkably. An efficient remote screen synchronization method is employed to transfer screens of some attendees to the projector-connected computer, which also can save the consumed bandwidth significantly. All above methods use the limited wireless bandwidth more efficiently. Performance evaluation shows that this approach can work perfectly for ubiquitous conference occasions.


Small Rectangle Screen Data User Registration Screen Content Conference Venue 
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.
    Granelli, F., Kliazovich, D.: Performance improvements in data transfer over 802.11 WLANs. In: Proceedings of Global Telecommunications Conference Workshops, November 29 - December 3, pp. 253–257 (2004)Google Scholar
  2. 2.
    Richardson, T., Stafford-Fraser, Q., Wood, K.R., Hopper, A.: Virtual network computing. IEEE Internet Computing 2(1), 33–38 (1998)CrossRefGoogle Scholar
  3. 3.
    Sullivan, J.M., Mullen Jr., J.S., Benz, U.A., Schmidt, K.F., Murugavel, M., Chen, W., Ghadyani, H.: Remote control of an MR imaging study via tele-collaboration tools. Proceedings of the SPIE 5748(1), 557–564 (2005)Google Scholar
  4. 4.
    Talwar, V., Basu, S., Kumar, R.: An environment for enabling interactive grids. In: Proceedings of the 12th IEEE International Symposium on High Performance Distributed Computing (HPDC 2003), Washington, DC, USA, pp. 184–193 (2003)Google Scholar
  5. 5.
    Haraikawa, T., Sakamoto, T., Hase, T., Mizuno, T., Togashi, A.: μVNC over PLC: a framework for GUI-based remote operation of home appliances through power-line communication. IEEE Transactions on Consumer Electronics 48(4), 1067–1074 (2002)CrossRefGoogle Scholar
  6. 6.
    Negishi, Y., Kawaguchi, N.: A desktop screen sharing system based on various connection methods. Transactions of the Institute of Electrical Engineers of Japan 125-C(12), 1882–1890 (2005)Google Scholar
  7. 7.
    Kim, J.H., Ahn, S.C., Kim, H.-G.: Teleconference system with a shared working space and face mouse interaction. In: Aizawa, K., Nakamura, Y., Satoh, S. (eds.) PCM 2004. LNCS, vol. 3332, pp. 665–671. Springer, Heidelberg (2004)CrossRefGoogle Scholar
  8. 8.
    Kaplinsky, K.V.: VNC tight encoder-data compression for VNC. In: Proceedings of the 7th International Scientific and Practical Conference of Students, Post-graduates and Young Scientists, Tomsk, March 2001, pp. 155–157 (2001)Google Scholar
  9. 9.
    Li, F., Nieh, J.: Optimal linear interpolation for server-based computing. In: Proceedings of the IEEE International Conference on Communications, New York, pp. 2542–2546 (April 2002)Google Scholar
  10. 10.
    Li, Q., Li, F.: FCE: a fast content expression for server-based computing. In: Proceedings of IEEE International Conference on Communications, vol. 3, pp. 1426–1430 (2004)Google Scholar
  11. 11.
    Jiang, W., Jin, H., Guo, M., Shao, Z., Zhu, Z.: A novel remote screen synchronization mechanism for ubiquitous environments. In: Proceedings of the First International Symposium on Pervasive Computing and Applications, Xinjiang, August 3-5 (2006)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Wenbin Jiang
    • 1
  • Hai Jin
    • 1
  • Zhiyuan Shao
    • 1
  • Qiwei Ye
    • 1
  1. 1.Cluster and Grid Computing LabHuazhong University of Science and TechnologyWuhanChina

Personalised recommendations