Next Steps in Signaling (NSIS): Framework

Hancock, Robert E. W.; Karagiannis, Georgios; Loughney, John; Bosch, Sven van den

doi:10.17487/rfc4080

Cited by 184 publications

(130 citation statements)

References 21 publications

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“…The MUSC approach assumes that each multi-user session is described in a Session Object (SOBJ) that is identified by a unique session identifier as proposed in the Next Steps in Signalling (NSIS) framework [21]. A multiuser session can be composed by a set of flows, whose QoS parameters are described based on the QSPEC object [22].…”

Section: Musc Qos Controlmentioning

confidence: 99%

QoS Support for Multi-user Sessions in IP-based Next Generation Networks

et al. 2008

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A combined control of multimedia quality level, mobility and allocation of network resources is essential for the success of next generation mobile networks. In this context, this article presents the Multi-user Session Control (MUSC) solution to control the quality level of multimedia sessions shared by multiple-users, providing Quality of Service (QoS) mapping and QoS adaptation for those sessions over heterogeneous and mobile networks. MUSC uses the self-organized principle to coordinate QoS mapping and QoS adaptation mechanisms with mobility and resource allocation controllers, allowing the adaptation of a session to the current network conditions and the dynamic selection of the suitable network service class to map the session. MUSC minimizes the blocking probability, optimizes the usage of network resources and keeps sessions with an acceptable quality of experience.

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Section: Musc Qos Controlmentioning

confidence: 99%

QoS Support for Multi-user Sessions in IP-based Next Generation Networks

et al. 2008

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“…Hop-by-hop protocols, such as RSVP and Next Steps in Signaling (NSIS) framework [HKL+05], on the other hand, involve states in one or more router(s) in-between in addition to the states in the communicating ends. The latter is more representative and more comprehensive to demonstrate the soft state operations.…”

Section: Studies On Soft State Protocolsmentioning

confidence: 99%

A UML Profile for Communicating Systems

Werner

Kraatz

Hogrefe

2006

System Analysis and Modeling: Language Profiles

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This thesis presents a new Unified Modeling Language 2 (UML AcknowledgmentsI am grateful to my supervisor Prof. Dr. Hogrefe for many fruitful and helpful discussions in the stimulating atmosphere of his research group. I also thank my co-supervisor Prof. Dr. Grabowski for accepting the task of examining this thesis.Many thanks go out to all my colleagues from the Institute of Informatics at the University of Göttingen. Especially, I am grateful to my colleagues Michael Ebner, Rene Soltwisch and Xiaoming Fu for useful and valuable discussions on formal modeling techniques.I also thank my students Julia Woch and Sebastian Kraatz for contributing to this work with their considerable efforts. This thesis would not be in its current shape without the comments of numerous people. I thank Omar Alfandi, Mohammed Alfandi, Andrea Hellner, Ingo Juchem, Helmut Neukirchen, Katharina and Peter Samow for reading this thesis, finding errors and providing helpful suggestions for improving this thesis. List of Figures IntroductionDue to the huge complexity of modern software systems, it is required to specify precisely what a software component should do and how it should behave. If the final implementation deviates from the expected behavior, its use or its communication with other software components may fail. In a software development process, the specification describes the expected behavior of the software; the description describes the actual behavior of that software. The actual behavior is the implementation. A specification is a technical contract between developers and users or clients. It is mainly intended to provide them with a mutual understanding of the software and is used to guide the development and the use. This also applies for the development of communicating protocols as they are merely implemented in software.Today, most protocol specifications are carried out in natural, informal language because it is easy to understand. However, experience has shown that specifications in natural languages can be vague, verbose and ambiguous. That means they can be interpreted in more than one way. A specification is formal if its meaning (its semantics) is unambiguous. Special languages, known as formal description techniques (FDTs), have been developed for the unambiguous specification and description of software. Hence, FDTs are distinguished from formal languages by having a formal syntax and a formal semantics. This stands in contrast to (semi-)formal languages such as Java or C++ which only have a formal syntax. FDTs are based on rigorous formal methods and offer the means for defining unambiguous specifications of network services and protocols in a more comprehensive and precise way than those done in natural language. In addition, they provide a basis for analysis, verification and validation of a specification before protocols are implemented. They can be used at the requirement stage to capture the user requirements. During the stage of analysis and design, FDTs can be used to describe abstract...

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“…This is further developed in the NSIS Framework [RFC4080]. Most of the threats described in this threat analysis are applicable to the NSLP application-specific part (e.g., QoS NSLP).…”

Section: Attacks Against the Ntlpmentioning

confidence: 99%

Security Threats for Next Steps in Signaling (NSIS)

Kroeselberg¹,

Tschofenig²

2005

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Next Steps in Signaling (NSIS): Framework

Cited by 184 publications

References 21 publications

QoS Support for Multi-user Sessions in IP-based Next Generation Networks

QoS Support for Multi-user Sessions in IP-based Next Generation Networks

A UML Profile for Communicating Systems

Security Threats for Next Steps in Signaling (NSIS)

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