Video chat applications demand strict QoS.
As mentioned before, it requires packet delay £
150 ms and bandwidth requirement > 100 kb/s.
The frame error rate needs to be £ 1 percent [5].
Therefore, continuous feedback is required
between the network and the video chat controller
(Fig. 2) for balancing between network
conditions and end users’ video chat expectations.
We now focus our discussion on network
architecture relevant to video chat.