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UVoD: An unified architecture for video-on-demand services

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1 Author(s)
Lee, J.Y.B. ; Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, Hong Kong

Existing video-on-demand (VoD) systems can be classified into two categories: true-VoD (TVoD) and near-VoD (NVoD). TVoD systems allocate a dedicated channel for every user to achieve short latency. NVoD systems make use of multicast technologies to enable multiple users to share a single channel to reduce system cost. This paper proposes a VoD architecture called UVoD that unifies the existing TVoD and NVoD architectures by integrating unicast with multicast transmissions. A performance model of the system is derived and numerical results show that one can achieve significant performance gain over TVoD (over 500%) under the same latency constraints.

Published in:

Communications Letters, IEEE  (Volume:3 ,  Issue: 9 )