Buffer Occupancy of Double-Buffer Traffic Shaper in Real-Time Multimedia Applications across Slow-Speed Links

DOI: 10.4236/cn.2013.51008   PDF   HTML   XML   3,754 Downloads   6,234 Views   Citations

Abstract

In this paper, a double-buffer traffic shaper was investigated to adjust video frame rate inflow into the TCP sender-buffer of a multimedia application source across a slow-speed link. In order to guarantee QoS across a slow-speed link (i.e. < 1 MBPS), the double-buffer traffic shaper was developed. In this paper, the buffer size dynamics of double-buffer was investigated. The arrival and departure of frames were modeled as a stochastic process. The transition matrix for the process was generated and the stationary probability computed. A simulation program was written in Matlab 7.0 to monitor the buffer fullness of the second buffer when a 3600 seconds H.263 encoder trace data was used as test data. In the second buffer, it was discovered that over 90% of the play-time, the buffer occupancy was upper bounded at 300 frames per second and utilization maintained below 30%.

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A. O. Oluwatope, D. T. Oyewo, F. E. Olayiwola, G. A. Aderounmu and E. A. Adagunodo, "Buffer Occupancy of Double-Buffer Traffic Shaper in Real-Time Multimedia Applications across Slow-Speed Links," Communications and Network, Vol. 5 No. 1, 2013, pp. 84-92. doi: 10.4236/cn.2013.51008.

Conflicts of Interest

The authors declare no conflicts of interest.

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