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Through the introduction of LTE (Long Term Evolution), which is a next-generation radio access network, the traditional circuit switching system in cellular telephony networks is migrating to VoLTE (Voice over LTE). Although LTE can provide high quality and high bandwidth, the call processing capacity of a VoLTE system is designed for normal traffic density, as is the traditional cellular network...
Today, with the advent of cloud computing and the growth of mobile services, a new Internet paradigm is required that is capable of providing an on-demand service by discovering and aggregating service resources for users. A Service Oriented Network (SON)[1] is focused on the services provided over a network rather than the technologies or their related components. These technologies or components...
In order to provide various attractive services to users, a user-centric approach such as usergenerated contents and services and a platform which can create a service easily and efficiently have been studied and designed during the past two decades. The IEEE NGSON standard has defined a functional architecture that provides advanced overlay functions for value-added services by collaboration of services...
A large number of attractive services, which combine the functionality of mobile terminals with existing services on the Internet, are spreading. The service delivery platform (SDP) can provide more attractive services by collaborating with telecommunication carrier services. SDP-based services are provided through collaboration among reusable service components, referred to as "enablers"...
The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP based network, has been the subject of considerable attention for several years. While there have been tremendous efforts to develop its architecture and protocols, especially for IMS, a key technology of the NGN, its wide deployment is still a long way off. However, efforts to create an advanced signaling...
With the increasing interest in deploying 4G/LTE networks, IMS has a potential to be deployed in a wide scale in order to support mobile Internet and value-added services over next-generation networks. Moreover, the effort to create an operator-controlled signaling infrastructure using IP-based protocols has resulted in a large number of functional components and interactions between core networks...
Mobile users' demand for using the best available network connection encourages mobile network operators (MNOs) to construct multi-access networks managed by all-IP based mobile networks. For such an MNO, the IP Multimedia Subsystem (IMS) is a promising service control infrastructure to provide IP-based multimedia services with QoS guarantee in the multi-access network. The service centralization...
In recent years, IMS architectures standardized by 3GPP have gained importance as the key technologies for the Next Generation Network that will provide high quality services over an IP network. These systems are being put to practical use and are mainly maintained and operated by telecommunication operators. In the future, deployment of new IMS services such as an IMS-based IPTV service and IMS-based...
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