An implementation of RACF to resource control in NGN for the network simulator ns-2

In the NGN architecture, the resource and admission control functions (RACF) is aimed at providing real-time application-driven and policy-based transport resource management for a wide range of services and transport technologies. The RACF has two entities; PD-FE (policy decision functional entity) and TRC-FE (transport resource control functional entity). The PD-FE makes the final policy decisions based on the service information such as service type, flow description, bandwidth and priority and transport network information such as maximum upstream and downstream. In this paper, we introduce a implementation of the RACF in NS-2 and the implementation more helps to understand the policy based NGN architecture and scenarios.