TITRE Adaptive Packet Video Streaming Over IP Networks - LaBRI

Id Condition Indicator Action
1 NetworkUnderLoad • Accept video out-of-profile traffic
• Mark in and out of profile video traffic with Gold
PHB
2 NormalNetworkLoad • Mark out-of-profile video traffic with Silver PHB
• Mark in-of-profile video traffic with Gold PHB
3 NetworkCongestion • Drop out-of-profile Traffic
• Mark in-of-profile video traffic with Bronze PHB.
Table 5-1: Policy for video marking
Time
(Second)
Action taken by the edge router
(Policy ID)
0 Id=1
53 Id=2
54 Id=1
56 Id=2
127 Id=3
139 Id=2
140 Id=3
142 Id=2
144 Id=3
177 Id=2
179 Id=1
Table 5-2: List of policies event sent by the PDP to the edge router
According to these events, we can say that the video traffic can get each time a dynamic
behavior. This-is very interested function, since the Internet Service Provider can make new
strategies of traffic engineering. Figure 5-31 shows the video traffic received at the end-user
terminal and Figure 5-32 details the different PHB color assigned with video traffic when it enters
the network.
In our scenario (see Figure 5-32), there are three significant time intervals, the first one from
[0s,56s] where the edge router accepts the video traffic (in profile and out-of-profile) because the
network congestion value is set to NetworkUnderLoad (id=1). In this case and according to the
predefined policies, traffic is marked with Gold PHB. Form [56s,144s], the edge router accept outof-profile
traffic but with a lower priority i.e. marked with Silver and when network congestion
occurs it will be first dropped. In profile traffic is marked with Gold. In this time interval the
network congestion value indicates NormalNetworkLoad (id=2). In last time interval [144s, 180s], the
network load augments (NetworkCongestion id=3), for that reason, out-of-profile traffic is dropped,
and in-of-profile is marked always with Silver PHB.
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