A complete solution to the Quality of Service (QoS) for converged networks is an important issue. The introduction of the resource control architecture used in the IP Multimedia Subsystem (IMS) to provide guaranteed QoS is a significant way to solve the QoS issues in converged networks. On the introduction of an IMS QoS service model based on a combination of the IntServ and DiffServ
the QoS control architecture
resource control and QoS authorization of the IMS networks are discussed in detail.