Inclusion of IP-VoD servicesThe dimensioning of the network is further
complicated by the addition of IP-VoD applications. These types of
applications use the unicast transport mechanism to provide communications
between the IPTV consumer devices and the on-demand video server. This
mode of operation consumes a large amount of bandwidth and the network
needs to accommodate this level of network traffic. Consider the same
network of 10,000 end users and assume that at a particular instance in time
there is 5% of the subscriber base accessing IP-VoD titles. By assuming again
that the H.264 compression standard is used, this translates to a peak usage on
the network of 1 Gbps (10,000 5% 2 Mbps). This is a significant
requirement for the core network.
2.8.2