On buffer requirements for store-and-forward video on demand service circuits

An investigation is made of the buffer requirements for a store-and-forward video on demand (VOD) service. In this service full motion video, compressed to about the 1.5-Mb/s rate, is stored in an information warehouse. It is then retrieved and delivered to the customer´s local broadband integrated services digital network (B-ISDN) central office (CO) via 150-Mb/s trunks. In the CO the video information is buffered and is played to the customer in real-time at the DS-1 rate. The authors address the multiplexing issue of multiple voice and VOD calls in an STS-3C trunk and the buffer requirements for the VOD service circuits in the CO to guarantee a desired level of performance