An Efficient QoS Control Mechanism for IMS based Convergence Network

In this paper, we propose a novel QoS control mechanism called IPFIX (class fixing in IP option header) which is intended to identify IMS user residing in conventional Internet for resources reservation in DiffServ core network. The work was motivated by the need of interoperability between QoS-enabled UMTS network and conventional Internet unable to support QoS for NGN (next generation network). IPFIX does not force user in Internet to be equipped with any resource reservation protocol such as PDP or RSVP. Instead it utilizes the option field of IP header that contains the minimum information of QoS. Our numerical analysis and implementation results show that IPFIX outperforms PDP and RSVP in terms of control overhead.