Towards continuous evolution through automatic detection and correction of service incompatibilities

Systems with long life times need to continuously evolve after deployment in response to changing technology and business needs. Lacking this ability not only prevents systems from quickly reacting to these changes, but also increases risk, as many small updates are collected into big infrequent upgrades. Service-oriented architectures support...

State of the art and research challenges in the area of autonomous control for a reliable internet of services

The explosive growth of the Internet has fundamentally changed the global society. The emergence of concepts like service-oriented architecture (SOA), Software as a Service (SaaS), Platform as a Service (PaaS), Infrastructure as a Service (IaaS), Network as a Service (NaaS) and Cloud Computing in general has catalyzed the migration from the...

Containerization of high level architecture-based simulations: A case study

NATO and the nations use distributed simulation environments for various purposes, such as training, mission rehearsal, and decision support in acquisition processes. Consequently, modeling and simulation (M&S) has become a critical technology for the coalition and its nations. Achieving interoperability between participating simulation systems...

An SDN-based architecture for Network-as-a-Service

Network-as-a-Service (NaaS) is a cloud-based service model that offers on-demand network connectivity and the provisioning and management of network services. However, the actual orchestration of dynamically allocating underlying resources to customer requirements is not trivial. In this paper, we propose an SDN-based approach to support the...

M&S as a service: Expectations and challenges

Modeling & Simulation as a Service (MSaaS) is a concept that potentially offers all kinds of possibilities to support M&S users and providers. For many reasons service-based approaches are considered to be very promising architectures for realizing next generation simulation environments. The combination of service-based approaches with ideas...

Architecture for self-organizing, co-operative and robust Building Automation Systems

This paper provides an overview of the architecture for self-organizing, co-operative and robust Building Automation Systems (BAS) proposed by the EC funded FP7 SCUBA1 project. We describe the current situation in monitoring and control systems and outline the typical stakeholders involved in the case of building automation systems. We derive...

Revenue optimization of service compositions using conditional request retries

Due to the inherent stochastic nature of services execution environment within service oriented systems, a runtime adaptation of the given composition may be required. We address a runtime service adaptation mechanism based on conditional retries for the orchestrated web services. The conditional retry may be issued while a concrete service...

Analysis of revenue improvements with runtime adaptation of service composition based on conditional request retries

In this paper we consider the runtime service adaptation mechanism for service compositions that is based on conditional retries. A single retry may be issued while a concrete service within composition is executed. This retry could either invoke the same concrete service or a functionally equivalent service implementing the same task. We...

Dynamic Profit Optimization of Composite Web Services with SLAs

In this paper we investigate sequential decision mechanisms for composite web services. After executing each sub-service within a sequential workflow, decisions are made whether to terminate or continue the execution of the workflow. These decisions are based on observed response times, expected rewards, and typical Service Level Agreement...

The UrbanFlood common information space for early warning systems

Early Warning Systems (EWS) can play a crucial role in mitigating the effects of natural disasters. Modern EWSs leverage wireless sensors for real-time monitoring of natural phenomena and computing-intensive scientific applications for scenario-based prediction and analysis of sensor data. This paper presents the UrbanFlood Common Information...

Intelligent overload control for composite web services

In this paper, we analyze overload control for composite web services in service oriented architectures by an orchestrating broker, and propose two practical access control rules which effectively mitigate the effects of severe overloads at some web services in the composite service. These two rules aim to keep overall web service performance ...

Combinational Services for NGN based IPTV

This paper describes the general concept of combinational/blended services for IP-based Television (IPTV) services in next generation networks towards its service oriented architecture concept (SOA). Besides introducing general approaches of service reusability (SOA concepts), the service enables (e.g. presence, notification, messaging) as...