Computer Communications and Networks, International Conference on (1997)
Las Vegas, NV
Sept. 22, 1997 to Sept. 25, 1997
Hon-Wai Chu , Sch. of Sci. & Technol., Open Univ. of Hong Kong, Kowloon, Hong Kong
D.H.K. Tsang , Sch. of Sci. & Technol., Open Univ. of Hong Kong, Kowloon, Hong Kong
We study the problem of dynamic bandwidth allocation for an ATM multiplexer loaded with real-rime VBR video traffic. The proposed mechanism adjusts the allocated bandwidth at regular intervals based on measured QoS. Instead of actual measurement of small cell loss ratios, we combine a virtual output buffer method with a regression method to shorten the time interval required for estimating the required bandwidth to support the specified QoS by prediction. Using numerical examples, we show that our proposed dynamic bandwidth allocation scheme is more efficient than the optimum static bandwidth allocation scheme. Our measurement-based scheme offers several advantages: (1) it removes the dependence on accurate traffic parameters to be declared by users; (2) it can be applied to a wide variety of traffic sources; (3) it adapts quickly to the variations of traffic with small measurement intervals, and (4) the complexity of the algorithm is small.
asynchronous transfer mode; dynamic bandwidth allocation; real-time VBR video traffic; ATM networks; ATM multiplexer; measured QoS; virtual output buffer method; regression method; bandwidth estimation; optimum static bandwidth allocation; traffic parameters; traffic sources; small measurement intervals; traffic variations; algorithm complexity; B-ISDN; video sequences; MPEG sequences
D. Tsang and H. Chu, "Dynamic bandwidth allocation for real-time VBR video traffic in ATM networks," Computer Communications and Networks, International Conference on(ICCCN), Las Vegas, NV, 1997, pp. 306.