“…But these parameters are not separate, unrelated, but interaction. For example, when the loss exceeds a certain threshold, jitter will increase exponentially [1]. This QoS single indexes and parameter are not sufficient to evaluate network performance quality accurately, for some parameters of QoS, such as packet loss, if the lost packet is not critical, it will not affect the transmission of video, from the user's perspective, the user is not concerned with packet loss but has or not influent on video quality, So, service providers gradually shifted the interest to the user experience quality.…”