WiMAX-UMTS Converging Architecture with IMS Signalling Analysis to Achieve QoS

The third-generation partnership project (3GPP) and 3GPP2 have standardized the IP multimedia subsystem (IMS) to provide ubiquitous and access network-independent IP-based services for next-generation networks via merging cellular networks and the Internet. The IEEE 802.16 worldwide interoperability for microwave access (WiMAX) promises to provide high data rate broadband wireless access services. The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGN s), since the interworking environment and the service flexibility that this technology offers to the currently deployed wireless broadband technologies makes it appealing to users, service developers and network operators. In this paper we propose a heterogeneous network model based on the IMS that integrates the Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and provides guaranteed QoS. In this paper, hybrid interworking architecture to integrate 3G (UMTS) and WiMAX networks with QoS is proposed. Moreover, IMS based signaling along with QoS algorithm was analyzed for UMTS and WiMAX interworking Architectures. QoS parameters such as Ethernet load and delay, IP Packet end to end delay, TCP delay, Active TCP connection count and TCP retransmission count, Email download response and upload response, Voice jitter, Voice packet delay variations and voice traffic received were analyzed.