While mobile IPTV services are supported through the mobile WiMAX networks, there must need some guaranteed bandwidth for the IPTV services especially if IPTV and non-IPTV services are simultaneously supported by the mobile WiMAX networks. The quality of an IPTV service definitely depends on the allocated bandwidth for that channel. However, due to the high quality IPTV services and to support ...

A web service is a software interface that describes a collection of operations that can be accessed over the network through standardized XML messaging. Web services in different domains are diverse in implementation techniques thus requiring us to meet a wide range of test requirements. Testing services and service centric system poses new challenges to testing approaches. Several web service...

This work deals with the main issues related to monitoring in the framework of the CADENUS project. Having defined an architecture capable to support dynamic service creation, configuration and delivery on top of Premium IP networks, the need arises to keep track of a number of parameters related to the quality of the service that has been negotiated and for which a formal contract (i.e. Servic...

In this paper we show how the application of the aspectoriented programming paradigm to runtime adaptation of service compositions can be used to prevent SLA violations. Adaptations are triggered by predicted violations, and are implemented as substitutions of fragments in the service composition. Fragments are full-fledged standalone compositions, and are linked into the original composition v...

In the scope of Service Oriented Architectures (SOA), Service Level Agreements (SLAs) are used to specify the conditions that have to be fulfilled by both service provider and consumer. These stakeholders need checking whether the executions of the services fulfill the conditions or not, so the evaluation is an important and not trivial task within the testing process. This paper describes the ...

In this paper, we show that Service Oriented Architectures enable exchanges to be more flexible inside the virtual enterprise (VE), because they create an electronic market-place between the actors composing the VE. However, mechanisms have to be settled to regulate exchanges inside the VE, as well as to protect the VE from external threats and aggressions. Those mechanisms can be materialized ...

A dynamic bandwidth assignment protocol is proposed that demonstrates impartial and highly efficient bandwidth arrangement for gigabit-capable passive optical networks. In particular the novel algorithm automatically modifies the assigned bandwidth per optical network unit to support quality of service and service level agreement according to maximum network capacity and users’ queuing status. ...

Service Level Agreement (SLA) specification languages express monitorable contracts between service providers and consumers. It is of interest to determine if predictive models can be derived for SLAs expressed in such languages, if possible in a fashion that is as automated as possible. Assuming that the service developer or user uses some SLA specification languages during the service develop...

In this paper, we study the important issue of verifying service-level agreement (SLA) with an untrusted cloud and present an SLA verification framework that utilizes a third-party auditor (TPA). A cloud provides users with elastic computing and storage resources in a pay-as-you-go way. An SLA between the cloud and a user is a contract that specifies the computing resources and performances tha...

Cloud Service Providers offer access to hardware and software resources across the Internet. Cloud Service Providers and their clients negotiate Service Level Agreements (SLA) that specify terms and conditions of services. To ensure that an SLA is being honored by all parties the service is monitored. This paper proposes a monitoring approach that automatically adapts the monitoring process in ...