A new dynamic bandwidth allocation scheme for MPEG videos in ATM networks

Authors:
Chin-Ling Chen;Ruay-Shiung Chang
Affiliations:
Department of Management Information System, National Pingtung Institute of Commerce, Pingtung, Taiwan, ROC;Department of Computer Science and Information Engineering, National Dong Hwa University, Hualien, Taiwan, ROC
Venue:
Computer Communications
Year:
2000

Citing 11
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Abstract

MPEG variable bit rate (VBR) video using constant bit rate (CBR) service requires bandwidth to be reserved at the peak rate. This will lead to lower bandwidth utilization. We propose a simple method to alleviate this situation. This method dynamically allocates the spare bandwidth to frames whose frame length exceeds the negotiated value. The smaller is the extra number of bandwidth units needed by the input frame, the greater is the priority for the connection to be assigned extra available bandwidth. The benefit of this prioritized order of spare bandwidth assignment for all existing connections is that bandwidth requirements for the largest possible number of connections can be satisfied. In this way, the bandwidth utilization can be increased. The simulation shows that the video quality and bandwidth efficiency can be maintained in our proposed method.