Adaptive bandwidth allocation based on playback tunnel to support video on demand service over ATM networks

✍ Scribed by Liren Zhang; Huirong Fu

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 221 KB
• Volume: 24
• Category: Article
• ISSN: 0140-3664
• DOI: 10.1016/s0140-3664(01)00301-2

✦ Synopsis

This paper focuses on adaptive bandwidth allocation (ABA) for transporting pre-stored VBR compressed video data across networks in support of video-on-demand (VoD) service. Two key issues are addressed. Firstly, a simpli®ed dynamic programming method based on playback tunnel is proposed to predict the bandwidth which can be dynamically allocated for transporting video segment to guarantee that the playback buffer neither under¯ows nor over¯ows. Secondly, ABA schemes with different criteria including middle-tunnel ABA (MT-ABA) and reduced-bandwidth-variability ABA (RBV-ABA) are investigated. The proposed ABA schemes are evaluated by a set of real-life MPEG video traces. The obtained results show that the RBV-ABA scheme outperforms MT-ABA scheme in terms of peak rate, traf®c burstiness and bandwidth variability. On the other hand, the MT-ABA scheme is more signi®cant for avoiding the playback buffer over¯ow or under¯ow than that of RBV-ABA.