Scalable video on demand on ABR in ATM networks

Abstract

The paper presents a new concept for transmitting video services using the ABR service category of ATM networks. The scalable video on demand transmission is assumed to have two different quality levels. The source tries to transmit with the better quality unless there is a congestion in the network. In the case of congestion, the source switches to the lower quality level until the congestion situation is over. The ATM switches are assumed to apply the recently proposed binary rate marking (Stop&Go) ABR algorithm which is a simplified version of the relative rate marking mechanism. The video transmission with ABR connections have to share the output links with different types of higher priority background traffic with different levels of burstiness. The paper presents transient and time-averaged results on the quality of scalable video transmission over ABR connections and gives a discussion on the subjective quality of transmitted video carried using this technique.