4th Generation Mobile Communication Networks Motivation Description Accelerated development of the Internet, and wireless mobile communications technology is rapidly changing the environment for all mobile communications and services. This heterogeneity can be observed in wireless access techniques, networks, user terminals, equipment, software operators and service providers. Therefore, the key to success in the next generation of wireless communication systems is providing seamless, adaptive and quality service in this heterogeneous environment. As the IMS (IP Multimedia Subsystem) platform expands and develops, service providers can provide services, such as voice, data and video streaming by open architecture and standards. Both wired and wireless networks work on IMS platform, which also increases QoS in heterogeneous networks. Therefore, the 4G-IMS network is expected to become a major trend in mobile networks. A unified heterogeneous network enables users to process any application with different terminal equipment. The level of handoff in such a network differs since applications move with the users across different network environments. The varying packet loss caused by different handoffs is expected to be a major challenge for QoS and Resource Management in the 4G-IMS network environment. This project considers whether the 4G-IMS network is being integrated heterogeneously in a changing environment. The C3QM (Cross-layer, Cognition, Cooperation, QoS Manager) design must ensure that heterogeneous network’s QoS, and increase the quality of service. The C3QM consists of three planes: the Data Plane, the Control Plane and the Knowledge Plane. The project performs three different stages: study, design and development. Project is to be integrated with other projects across Universities in Taiwan, to realize the results of 4G-IMS test-bed research. This research considers technology standardization, renewal and punctuality. Forehead technologies from other research centers can also be integrated using Cross-Layer, Cognition and Cooperation design structure to integrate original wire and wireless network structures in order to develop their practical and complete functions. Probable problems and solutions examined in this study may provide an important reference for building and operating actual 4G-IMS Networks in the future. Traditional TCP/IP Networks use layer-by-layer modules, which enable most communications between neighboring layers. However, possible performance degradation in wireless networks includes high error rates, security, QoS and power wastage of mobile communications. The recently proposed Cross-Layer concept enables delivery without the order of OSI-7 Layer. Therefore, Cross-Layer design can enhance wireless network performance. Cognitive Networks are able to create the policies and act intelligently by collecting information about network status and interaction. These networks differ from other intelligent communication technologies in that these behaviors optimize end-to-end performance. End- to-end goals must be transformed into a form which can be cognitively understood. Cooperative Networks use the concept of distributed agents. Agent Cooperation modules are set in each End-to-End node. These networks optimize QoS policy by sharing information between Agent Cooperation modules, user Service Level Agreements (SLA) and attributes of application network server and network loading to satisfy user requests for QoS.