IP Multimedia Subsystem (IMS) plays as a core platform in next-generation-network architecture, which advocates for an open and inter-operable service infrastructure. However, over the years, not much attention has been paid to the security problem of IMS. The time has come to now address security issues. This paper proposes a multi-attribute stereo model based on X.805 standard, which addresse...

Over the last years, prepaid charging has become an essential option for the billing of telecommunication services. However, the evolution toward QoS-enabled AllIP networks, like the 3GPP IP-Multimedia Subsystem (IMS) and corresponding Next Generation Network (NGN) services, is posing increasingly complex requirements to the real-time capabilities of such a charging mechanism. In order to cope ...

This paper summarizes IMS based IPTV as defined in ETSI TISPAN Release 2 as well as the potential enhancements being added in Release 3 at the time of writing. After an introduction to the use cases and to TISPAN NGN standardization, the different aspects, such as Service Discovery, User Profiles and the underlying signaling concepts are discussed. Furthermore this paper provides links to other...

In this research article we discuss the protocols, architecture and propose the design of Network Domain Security (NDS) model for IP Multimedia Subsystem (IMS). The IMS is standardized by 3GPP (Third Generation Partnership Project) and 3GPP2 as next generation service delivery platform developed for IP technology on top of all access networks including mobile and fixed networks. The architectur...

SIP (Session Initiation Protocol) has been chosen as the core signaling protocol of the NGN (Next Generation Network), but the large SIP message which is text-based is an obstacle with the planned usage of SIP in wireless mobile networks. Based on the SigComp (Signaling Compression) framework, some further improvements are made to the Deflate algorithm according to the characteristics of SIP in...

IMS(IP Multimedia Subsystem) network uses SIP (Session Initiation Protocol) as its core control protocol. The defensive ability of the malformed SIP message is particularly important for IMS network security. In this paper, we propose a malformed SIP generation method based on SIP parsing mode and the associated attack testing method. Based on SIP parsing mode of functional entities in IMS, we ...

The IP multimedia subsystem (IMS) is a basis for a significant new architecture which offers network operators the opportunity to expand their services, by integrating voice and multimedia communications and delivering them into new environments with new purposes. Basically, the IMS is an overlay network on top of IP layer that uses Session Initiation Protocol (SIP) as the primary signaling mec...

v Abstract With the emergence of mobile multimedia services, such as unified messaging, click to dial, cross network multiparty conferencing and seamless multimedia streaming services, the fixed–mobile convergence and voice–data integration has started, leading to an overall Internet–Telecommunications merger. The IP Multimedia Subsystem (IMS) is considered as the next generation service delive...

Voice over IP (VoIP) and Internet Multimedia Subsystem (IMS) technologies are rapidly being adopted by consumers, enterprises, governments and militaries. These technologies offer higher flexibility and more features than traditional telephony (PSTN) infrastructures, as well as the potential for lower cost through equipment consolidation and, for the consumer market, new business models. Howeve...

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 di...