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In this paper, we consider a scenario in which the source has been offered QoS guarantees subject to token-bucket regulation. The rate of the source should be controlled such that it conforms to the token-bucket regulation, and also the distortion obtained is the minimum. We have developed an optimal scheduling algorithm for offline (like pre-recorded video) sources with convex distortion function and which can not tolerate any delay. This optimal offline algorithm has been extended for the real-time online source by predicting the number of packets that the source may send in future. The performance of the online scheduler is not substantially degraded as compared to that of the optimal offline scheduler. A sub-optimal offline algorithm has also been developed to reduce the computational complexity and it is shown to perform very well. We later consider the case where the source can tolerate a fixed amount of delay and derive optimal offline algorithm for such traffic source.

참고문헌 (12)

  1. Z. Miao and A. Ortega, 'Optimal scheduling for streaming of scalable media,' in Proc. Asilomar Conf Signals, Systems, and Computers, CA, Nov. 2000 
  2. The video trace files, available at http://www-tkn.ee.tu-berlin.de/research /trace/trace.html, May 2003 
  3. C.-Y. Hsu, A. Ortega, and A. R. Reibman, 'Joint selection of source and channel rate for VBR video transmission under ATM policing constraints,' IEEE J. Select. Areas Commun., vol. 15, pp. 1016-1028, Aug. 1997 
  4. M. Hamdi, J. W. Roberts, and P. Rolin, 'Rate control for VBR video coders in broad-band networks,' IEEE J. Select. Areas. Commun., vol. 15, pp. 1040-1051, Aug. 1997 
  5. P. Shah and A. Karandikar, 'Optimal packet length scheduling for regulated media streaming,' IEEE Commun. Lett., vol. 7, no. 8, pp. 409-411, Aug. 2003 
  6. P.-Y. Cheng, J. Li, and C.-C. J. Kuo, 'Rate control for an embedded wavelet video coder,' IEEE Trans. Circuits Syst. Video Technol., vol. 7, no. 4, pp. 696-702, Aug. 1997 
  7. D. A. Turner and K. W. Ross, 'Optimal streaming of a synchronized multimedia presentation with layered objects,' in Proc. IEEE Int. Conf. Multimedia and Expo, New York, July 2000 
  8. S. Keshav, An Engineering Approach to Computer Networking, Addison Wesley, 2001 
  9. A. Lombardo and G. Schembra, 'Performance evaluation of an adaptiverate MPEG encoder matching IntServ traffic constraints,' IEEE/ACM Trans. Networking, vol. 11, no. 1, pp. 47-65, Feb. 2003 
  10. P. A. Chou and Z. Miao, 'Rate-distortion optimized streaming of packetized media,' MSR-TR-2001-35, Microsoft Research, Redmond, WA, USA, Feb. 2001 
  11. Z. Wang, Internet QoS: Architectures and Mechanisms for Quality of Service, Morgan Kaufmann Publishers, 2001 
  12. A. Ortega, K. Ramchandran, and M. Vitterli, 'Optimal trellis-based buffered compression and fast approximation,' IEEE Trans. Image Processing, vol. 3, no. 1, pp. 26-40, Jan. 1994 

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