Dynamic bandwidth allocation for VBR video transmission

Document Type

Article

Publication Date

1-1-2003

Abstract

To guarantee quality of service (QoS), the requirements for video transmission, such as delay and cell loss rate (CLR), are very stringent. These constraints are difficult to meet if high network utilization is desired. In this paper, dynamic bandwidth allocation algorithms are proposed to improve the bandwidth utilization. The first approach based on scene change identification, in which the bandwidth is allocated based on the maximum and mean bandwidth of the scene, is applicable to delivering pre-recorded videos. The second approach, in which the bandwidth is adjusted based on the current frame size, can be used to deliver real-time videos on-line. When the bandwidth deviation is large enough, the bandwidth renegotiation process is triggered. Compared with the CBR service, network utilization can be improved significantly for the same CLR. In general, to achieve a very low CLR and high bandwidth utilization, the renegotiation frequency may become high. Algorithms, which are proven to be effective in reducing the renegotiation frequency while keeping the bandwidth utilization at a reasonable level, are also proposed.

Identifier

85040736688 (Scopus)

Publication Title

Journal of Computing and Information Technology

External Full Text Location

https://doi.org/10.2498/cit.2003.04.05

e-ISSN

18463908

ISSN

13301136

First Page

309

Last Page

317

Issue

4

Volume

11

Fund Ref

State of New Jersey Commission on Science and Technology

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