session based services and non-session based services are sure to co-exist in the same NGN
while diversified servers and fine control of the non-session based services must be simultaneously available to ensure the QoS of the entire NGN.In this paper
three co-working modes between the Resource and Admission Control Subsystem(RACS) and the Deep Packet Inspection(DPI) system in NGN are presented and their advantages and disadvantages discussed and analyzed
and it is pointed out that exclusive identification and control modes are suitable for telecom providers to deploy DPI systems in NGN.