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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.


Papers
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Proceedings ArticleDOI
11 Apr 2011
TL;DR: An anomalous message detection framework that extracts novel syntactical features from SIP messages at the P-CSCF of an IMS that is lightweight requiring less processing and memory resources and provides high detection accuracy.
Abstract: Modern communication infrastructure (IP Multimedia Subsystem (IMS) and Voice over IP (VoIP)) are vulnerable to zero day attacks and unknown threats. Anomalous SIP requests can be used to remotely launch malicious activity. Furthermore, anomalous messages are capable of crashing - sometimes with one message only - servers and end points. Recently, it is shown that a malicious SIP message "INVITE of Death" crash a server or gain unfettered access to it. In contrast, little research is done to protect IMS against such anomalous messages. In this paper, we propose an anomalous message detection framework that extracts novel syntactical features from SIP messages at the P-CSCF of an IMS. Our framework operates in four steps: (1) analyzes the byte-level distribution of SIP message, (2) extracts spatial features from IMS messages in form of byte transition probabilities, (3) uses well-known feature selection scheme to remove redundancy in the features set, and (4) uses standard machine learning algorithms to raise the final alarm. The benefit of our framework is that it is lightweight requiring less processing and memory resources and provides high detection accuracy. We have evaluated our system on a real-world IMS dataset consisting of more than 10, 000 benign and malicious SIP messages. The results of our experiments demonstrate that using machine learning algorithms, our framework achieves detection accuracy of more than 99%. Last but not least, its testing time is 152μ seconds per packet, as a result, it can be easily deployed on IMS core.

10 citations

Journal ArticleDOI
TL;DR: This article presents a critical review of existing service differentiation solutions and proposes a new control-level call differentiation solution for IMS-based 3G core networks, consisting of a novel call differentiation scheme, enabling the definition of various categories of calls with different QoS profiles.
Abstract: The 3GPP-defined IP Multimedia Subsystem is becoming the de facto standard for IP-based multimedia communication services. It consists of an overlay control and service layer that is deployed on top of IP-based mobile and fixed networks, in order to enable the seamless provisioning of IP multimedia services to 3G users. Service differentiation, which implies the network's ability to distinguish between different classes of traffic (or service) and provide each class with the appropriate treatment, is an important aspect that is considered in 3G networks. In this article, we present a critical review of existing service differentiation solutions and propose a new control-level call differentiation solution for IMS-based 3G core networks. The solution consists of a novel call differentiation scheme, enabling the definition of various categories of calls with different QoS profiles. To enable the support of such profiles, an extended IMS architecture, relying on two adaptive resource management mechanisms, is proposed. Furthermore, simulations are used to evaluate the system performance. Compared to existing service differentiation solutions, our solution offers several benefits, such as: flexible QoS negotiation mechanisms, control over many communication aspects as means for differentiation, and a dynamic and adaptive resource management strategy.

10 citations

Patent
Hyo-Sik Bang1
14 Feb 2006
TL;DR: In this paper, a system and method for managing multimedia messages is presented, where a mobile terminal for sends a multimedia message including multimedia data having a storage directory and a disclosure level set according by a user, a multimedia messaging service center stores the multimedia data included in the multimedia message in a directory corresponding to the set storage directory.
Abstract: A system and method for managing multimedia messages, wherein a mobile terminal for sends a multimedia message including multimedia data having a storage directory and a disclosure level set according by a user, a multimedia messaging service center stores the multimedia data included in the multimedia message in a directory of a multimedia message box corresponding to the set storage directory, and a web server detects an access level of a web user requesting access to the multimedia data, and offers the multimedia data stored in the corresponding directory to the web user, when the detected access level is identical to the disclosure level set for the multimedia data.

10 citations

Dissertation
12 Jul 2013
TL;DR: An approach to automatize the management of faults, covering the different segments of a network, and the end-to-end services deployed over them is proposed, using a new concept called self-modeling that formulates off-line generic patterns of the model, and identifies on-line the instances of these patterns that are deployed in the managed network.
Abstract: While modern networks and services are continuously growing in scale, complexity and heterogeneity, the management of such systems is reaching the limits of human capabilities. Technically and economically, more automation of the classical management tasks is needed. This has triggered a significant research effort, gathered under the terms self-management and autonomic networking. The aim of this thesis is to contribute to the realization of some self-management properties in telecommunication networks. We propose an approach to automatize the management of faults, covering the different segments of a network, and the end-to-end services deployed over them. This is a model-based approach addressing the two weaknesses of model-based diagnosis namely: a) how to derive such a model, suited to a given network at a given time, in particular if one wishes to capture several network layers and segments and b) how to reason a potentially huge model, if one wishes to manage a nation-wide network for example. To address the first point, we propose a new concept called self-modeling that formulates off-line generic patterns of the model, and identifies on-line the instances of these patterns that are deployed in the managed network. The second point is addressed by an active self-diagnosis engine, based on a Bayesian network formalism, that consists in reasoning on a progressively growing fragment of the network model, relying on the self-modeling ability: more observations are collected and new tests are performed until the faults are localized with sufficient confidence. This active diagnosis approach has been experimented to perform cross-layer and cross-segment alarm management on an IMS network.

10 citations

Journal ArticleDOI
TL;DR: A multi-attribute stereo model based on X.805 standard is proposed, which addresses a comprehensive, top-down, end-to-end perspective for IMS security analysis, classification and assessment and the vulnerability utilized by the threat is presented.
Abstract: 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 addresses a comprehensive, top-down, end-to-end perspective for IMS security analysis, classification and assessment. Besides, a detailed threat analysis of IMS is demonstrated and the vulnerability utilized by the threat is also presented.

10 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20235
202219
202124
202050
201971
201881