OSGi-based IP Multimedia Subsystem Services Gateway

IP Multimedia Subsystem (IMS) is the integration platform for multimedia application services and provides a rich feature set of converged services in Next Generation Network (NGN). People can access IMS services anytime anywhere using their self IMS devices which refers to mobile devices equipped with a Universal Subscriber Identity Module (USIM) card. Since the rapid development of Information and Communication Technology (ICT), people own many devices connected to the Internet in the home or office environment. Except for the mobile devices equipped with USIM card, people wish that these devices connected to the Internet also can access IMS services but without USIM card. Therefore, in this paper, we propose an Open Service Gateway Initiative (OSGi)-based IMS service gateway, which can is authorized by the self IMS device and enable these non-IMS devices to access IMS services. Besides, these non-IMS devices may use different network access technologies and network protocols. The proposed IMS service gateway employs the OSGi framework to solve the integration problem.