| 摘要 |
<p>A Resource Admission Control Subsystem (RACS) in NGN includes: Resource Control Function in access network (A-RCF); Access Admission Control Function (A-ACF); Resource Control Function in core networks (C-RCF); Interconnection Admission Control Function (I-ACF) and the correlative interfaces. As an independent subsystem logically, RACS can support the request of transmitting QoS of many service subsystems (including IP Multimedia Service Subsystem and PSTN/ISDN Service Emulation Subsystem), achieve the QoS control of the interconnected links between different management fields, counterpoise network loads and prevent congestion (especially in the bottleneck of the network resource) , and support the necessary transmission layer measurement and protection mechanism, solve the competition problem of transmitting resource among the NGN service flows within each management field.</p> |
