Performance of dynamic resources allocation with QoS guarantees for MPEG VBR video traffic transmission over ATM networks

被引:0
|
作者
de la Cruz, LJ [1 ]
Mata, J [1 ]
机构
[1] Polytech Univ Catalonia, Dept Appl Math & Telemat, Barcelona 08034, Spain
关键词
MPEG VBR; ATM networks; Markov modulated fluid processes; bandwidth renegotiation; Quality of Service;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Most of the new and interesting services that can be implemented over the B-ISDN networks include the transmission of variable bit rate (VBR) video traffic. Generally, the own nature of this kind of services implies the need of a high Quality of Service (QoS). Unfortunately, to provide this high QoS to the VER video traffic with a high efficiency in bandwidth utilization is not a trivial problem. This is due to the bursty nature of the VER video traffic on different rime scales. This traffic behavior is named self-similarity. In order to improve channel utilization, some services with bandwidth renegotiation have been recently proposed. In this work, a new mechanism to accomplish the bandwidth renegotiation over ATM networks for VER video traffic is presented. The mechanism is based on a previous characterization of the MPEG VER video traffic at Group of Pictures (GoP) level by means of a bidimensional Markov Modulated Fluid Process (MMFP). A new element, with supervision and control functions, is proposed and validated. Moreover, the achieved benefits in terms of bandwidth gain that can be expected with the renegotiation system are analytically computed using the fluid flow approximation. Finally, the applicability of the supervisor and controller elements and its parameters are studied using four long MPEG VER sequences.
引用
收藏
页码:1483 / 1489
页数:7
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