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

Authors:
L Zhang;H Fu
Affiliations:
Network Technology Research Center, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798;Network Technology Research Center, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore 639798
Venue:
Computer Communications
Year:
2001

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Abstract

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 underflows nor overflows. Secondly, optional DBA schemes including left-edge DBA, right-edge DBA, middle-tunnel DBA (MT-DBA) and reduced-bandwidth-variability 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, traffic burstiness and bandwidth variability. On the other hand, the MT-DBA scheme can effectively avoid the playback buffer overflow and underflow.