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IMS (IP Multimedia Subsystem) network has high demands from perspective of multimedia, flexible and interactive communications. Fulfillment of those demands, with appropriate levels of quality, is not a simple task. As usage of services has great progress lately, there is high demand for their interaction management. Authors suggest way of Next Generation Networks application level organization and...
Handling the dynamics of future service-based distributed systems in real-time is a complex problem; a number of state transitions or reconfigurations take place that must be handled in real-time; this requires to impose some bounds to the structure of the system to ensure timely operation. We present a model for real-time reconfiguration based on a service model using the concept of service implementations...
The advancements in distributed computing have driven the emergence of Service Oriented infrastructures that allow for on-demand provision of ICT assets. Taking into consideration the complexity of distributed environments, significant challenges exist in providing and managing the offered on-demand resources with the required level of Quality of Service (QoS), especially for real-time interactive...
The advancements in distributed computing have driven the emergence of service-based infrastructures that allow for on-demand provision of ICT assets. Taking into consideration the complexity of distributed environments, significant challenges exist in providing and managing the offered on-demand resources with the required level of Quality of Service (QoS), especially for real-time interactive multimedia...
Modern distributed real-time systems (DRTS) are typically formed by several heterogeneous networked devices. Sometimes these devices must adapt to dynamic environments in which devices may join or leave the network and must respond in run-time to changing requirements ensuring certain levels of QoS. These characteristics yield to systems that are intrinsically complex to develop, test and maintain...
In this paper, we introduce an IP multimedia sub-system (IMS) based testbed which provides a platform for the study of real-time services integration and orchestration. This open-source based testbed is built on the principle of service oriented architecture (SOA), with an emphasis for real-time network services. We further developed service-oriented system functionalities such as optical network...
Service-oriented architecture (SOA) has become the preferred methodology to build complex enterprise applications. Inside an enterprise, an enterprise service bus (ESB) has emerged as a powerful and flexible solution to have services and applications interact with each other, independently of their location and connectivity requirements. ESBs are implemented with some form of middleware, and messaging...
Current generation of distributed real-time systems requires more flexibility and the ability of changing its behaviour at run time. This paper presents a model and an algorithm for QoS-aware service composition in distributed systems with real-time requirements. This model is applicable in application domains where temporal guarantees and flexibility are needed, such as remote monitoring, control...
This paper presents a model for quality-of-service (QoS)-aware service composition in distributed systems with real-time and fault-tolerance requirements. This model can be applied in application domains like, for example, remote monitoring, control and surveillance. Classic approaches to real-time systems do not provide the flexibility and fault-tolerance required in new emerging environments that...
Service oriented architecture (SOA) has become a popular paradigm for software development in many application domains, including real-time applications. Timing analysis is a critical issue which can guide service composition to best satisfy the real time requirements of the composed system. However, existing timing analysis works do not sufficiently address some important issues. For example, admission...
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