Before revision:  To overcome this limitation, an enhanced global timing analysis , accounting the flow serialization phenomena along the flow path , is proposed in this paper to improve the delay bounds tightness.
After revision:  Hence, the main contribution in this paper is enhancing the delay bounds tightness of such networks, through an innovative global analysis based on Network Calculus , accounting the flow serialization phenomena along the flow path , is proposed in this paper to improve the delay bounds tightness.