Topic
IP Multimedia Subsystem
About: IP Multimedia Subsystem is a research topic. Over the lifetime, 4398 publications have been published within this topic receiving 43698 citations.
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Patent•
15 Apr 2015
TL;DR: In this article, the authors present a communication method, user equipment (UE) and a communication device of the user equipment, in which an IMS (IP multimedia subsystem) can perceive that the UE is switched, so that subsequent charging and called domain routing is facilitated.
Abstract: The embodiment of the invention provides a communication method, user equipment (UE) and a communication device of the user equipment. According to the method, an IMS (IP multimedia subsystem) can perceive that the UE is switched, so that subsequent charging and called domain routing is facilitated. In one embodiment, the UE initiates a re-registration process after finishing switching between WiFi and LTE (Long Term Evolution), and carries UE switching related information to an application server in the IMS through a registration request; in another embodiment, after the UE finishes switching between WiFi and LTE, a P-CSCF (Proxy-Call Session Control Function) perceives that the UE is switched according to an IP-CAN (IP-Connectivity Access Network) conversation process, an IP-CAN change event, an RAT- change event or the like, and the P-CSCF notifies the switching information of the UE to the application server in the IMS through a NOTIFY request, a MESSAGE request, an INFO request, an INVITE request and the like.
13 citations
TL;DR: Mobile voice over IP (mVoIP) is a tempting prospect for many companies, and may become an important service in the coming years as device manufacturers exploit more-powerful processors and cheaper memory.
Abstract: Mobile voice over IP (mVoIP) is a tempting prospect for many companies. After all, sending wireless phone calls over IP networks is considerably less expensive than sending them over cellular voice networks. This may become an important service in the coming years as device manufacturers exploit more-powerful processors and cheaper memory. Faster processors and cheaper memory will enable conference calls, voice encryption, the use of compressed codecs, and video calls, assuming there are also fast networks.
13 citations
TL;DR: The OPUCE service execution architecture, which is designed to allow interoperation of telco and information technology (IT) applications in a seamless event-driven manner, and the service creation workbench that enables end users to build their own personalized service mash-ups and share them with the community are described.
Abstract: Telecom operators are facing major business challenges as Internet players are becoming an increasing threat in both new and traditional communications markets. Technologies like Web 2.0, Session Initiation Protocol (SIP), and peer-to-peer (P2P) allow for easy integration of communication features in social networking applications. IP Multimedia Subsystem (IMS) is a proposed solution from the telecommunications industry, but its architecture is complex and costly and still doesn't offer the Internet world the flexibility that end users expect. The Sixth Framework Programme (FP6) of the Information Society Technologies (IST) Integrated Project (IP) Open Platform for User-centric service Creation and Execution (OPUCE) addresses these challenges from a technical and business perspective. In this paper, we describe the OPUCE service execution architecture, which is designed to allow interoperation of telco and information technology (IT) applications in a seamless event-driven manner, and the service creation workbench that enables end users to build their own personalized service mash-ups and share them with the community.
13 citations
Posted Content•
TL;DR: In this paper, a new IMS service authentication scheme using identity based cryptography (IBC) was proposed, which will lead to better performances when there are simultaneous authentication requests using identity-based batch verification.
Abstract: Nowadays, the IP Multimedia Subsystem (IMS) is a promising research field. Many ongoing works related to the security and the performances of its employment are presented to the research community. Although, the security and data privacy aspects are very important in the IMS global objectives, they observe little attention so far. Secure access to multimedia services is based on SIP and HTTP digest on top of IMS architecture. The standard deploys AKA-MD5 for the terminal authentication. The third Generation Partnership Project (3GPP) provided Generic Bootstrapping Architecture (GBA) to authenticate the subscriber before accessing multimedia services over HTTP. In this paper, we propose a new IMS Service Authentication scheme using Identity Based cryptography (IBC). This new scheme will lead to better performances when there are simultaneous authentication requests using Identity-based Batch Verification. We analyzed the security of our new protocol and we presented a performance evaluation of its cryptographic operations
13 citations
01 Dec 2012
TL;DR: In NTMobile, a packet manipulation method in the Linux kernel module is implemented so as to achieve high levels of throughput performance.
Abstract: IP mobility is the technology that realizes a continuous communication even when communicating wireless nodes switch access networks. NTMobile (Network Traversal with Mobility) is a new type of IP mobility technology for the IPv4 and IPv6 networks. NTMobile nodes can also achieve IP mobility in global IP networks as well as in private IP networks by creating a tunnel route between a pair of NTMobile nodes. In NTMobile, network applications use virtual IP addresses to achieve a continuous communication at the time when real IP addresses change due to the switching of access networks or node movements. In NTMobile, we implement a packet manipulation method in the Linux kernel module so as to achieve high levels of throughput performance.
13 citations