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Optional dynamic bandwidth allocation based on playback tunnel to support video-on-demand service in virtual private networks

✍ Scribed by L Zhang; H Fu

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
277 KB
Volume
24
Category
Article
ISSN
0140-3664

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✦ Synopsis

This paper focuses on the optional dynamic bandwidth allocation (ODBA) scheme to support video-on-demand (VoD) services in virtual private networks (VPN). Firstly, an approach based on playback tunnel is proposed to determine a feasible range of bandwidth used for dynamic bandwidth allocation to transport video segments with the guarantee that the playback buffer neither under¯ows nor over¯ows. Secondly, optional DBA schemes including left-edge DBA, right-edge DBA, middle-tunnel DBA (MT-DBA) and reduced-bandwidthvariability DBA (RBV-DBA) are investigated extensively. The proposed schemes are evaluated by a set of real-life MPEG video traces. The obtained results show that the RBV-DBA scheme outperforms other schemes in terms of reducing peak rate, traf®c burstiness and bandwidth variability. On the other hand, the MT-DBA scheme can effectively avoid the playback buffer over¯ow and under¯ow.

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