Reliability of IMS architecture

Mendiratta, Veena; Pant, Himanshu

doi:10.1109/atnac.2007.4665302

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…Our test bed relies different component among then IMS (IP Multimedia Architecture) entities on which we did our test bed. Figure 1 illustrated by Mendiratta and Pant (2007) shows the IMS Architecture. The IMS is an architecture framework for delivering IP multimedia services.…”

Section: Proposed Architecturementioning

confidence: 99%

Service Broker-Based Architecture Using Multi-Criteria Decision Making for Service Level Agreement

Haddar¹,

Raouyane²,

Bellafkih³

2019

CIS

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With the on-going trends of the telecom services, the number of service providers with similar functionalities is undergoing a rapid growth. The customers face the difficulty to decide which service provider can satisfy their needs and full their requirements. Negotiating contracts between involved parts, and hiding heterogeneity in the distributed network environment has been challenging for telecom operators and service providers. Different languages exist to describe the Service Level Agreement (SLA), which is a contract between a service provider and a customer. However, since each service provider expresses his SLA in his own way, it disrupts the customer's choice of the best service provider, and leads to a bad contract management. In this respect, we propose a novel architecture for service selection, and SLA management between different stakeholders in our network architecture. The idea is to set up a smart broker where we implemented a Multi-Criteria Decision Making (MCDM) method to maximize utility function so that the customer can choose services with required QoS performances. We also came up with the idea of settling a negotiation model for the SLA, and a context based SLA contract ontology in IP Multimedia Subsystem (IMS) network is also proposed to provide users with a clear model to express their requirements and preferences. Moreover, we used the New Generation Operations Systems and Software (NGOSS) Framework to model and analyze networks and services actions. To better understand the relationship and the projection of NGOSS Framework and IMS platform, we introduce an SLA management and monitoring architecture in IMS network.

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Section: Proposed Architecturementioning

confidence: 99%

Service Broker-Based Architecture Using Multi-Criteria Decision Making for Service Level Agreement

Haddar¹,

Raouyane²,

Bellafkih³

2019

CIS

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“…As usual, hardware and software redundancy are vital resilience mechanisms to avoid/reduce IMS unavailability and single point of failure problems. Two types of such technique can be deployed: (i) local redundancy -for the core IMS, diverse approaches might be used, e.g., active/standby, active/active, N+K [34]; geographical redundancyit can be achieved using different subsolutions such as stateless geo-redundancy, double provisioning, automatic data replication, and IMS restoration depending on the type of node.…”

Section: ) Redundancymentioning

confidence: 99%

A Model-Based Resilience Analysis for IMS

Natouri

Lac

Serhrouchni

2014

JNW

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IMS (IP Multimedia Subsystem) has become the basis of fixed-mobile convergence for telecommunication operators. Compared to previous networks, IMS presents huge advantages, especially in terms of its ability to offer all types of services (voice and data). Nevertheless, with these advantages comes a whole new package of resilience (dependability & security) challenge, e.g., attacks, human mistakes, large scale disasters, etc. In this paper, we provide an overview on the state of research in the field of IMS resilience. We propose a two-dimensional tree-based taxonomy of IMS resilience challenges. This taxonomy considers unique features of IMS such as the layered architecture. We also classify the existing countermeasures into eight classes. We identify the resilience objectives of these countermeasures and analyze their applicability and efficiency on challenge families.

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“…Other important metrics related to the signalling system are: the reliability of sessions, which takes into account that a single user session may be composed by several requests of different services, 10 and the duration of the failover, which has a strong influence on the expected period when the system is unavailable. 11 The article is organized as follows. First, the IMS system and the call set-up procedure for real-time communications involving it are introduced, and its main performability issues are discussed.…”

Section: Introductionmentioning

confidence: 99%

Semi-Markov models for performance evaluation of failure-prone IP multimedia subsystem core networks

Guida

Longo

Postiglione

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part O:

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Next generation telecommunication core networks are typically based on the Third Generation Partnership Project Internet protocol (IP) multimedia subsystem (IMS). Their planning and deployment must take into account the occurrence of random failures causing performance degradations, in order to assess and maintain a high level of quality of service. In particular, IMS signalling servers can be modelled as repairable multi-state elements where states correspond to different performance levels. This article provides an evaluation of IMS signalling network performance in long runs in terms of two metrics adopted in the practice, such as the number of call set-up sessions that the network can manage at the same time and the call set-up delay. A semi-Markov model has been adopted for the IMS servers, which allows as well for non-exponential probability distributions of sojourn times, as often observed in real networks. Furthermore, a redundancy optimization problem is solved in an IMS-based realistic scenario, to the aim of minimizing the deployment cost of a telecommunication network with a given availability requirement

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Reliability of IMS architecture

Cited by 8 publications

References 6 publications

Service Broker-Based Architecture Using Multi-Criteria Decision Making for Service Level Agreement

Service Broker-Based Architecture Using Multi-Criteria Decision Making for Service Level Agreement

A Model-Based Resilience Analysis for IMS

Semi-Markov models for performance evaluation of failure-prone IP multimedia subsystem core networks

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