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Massively online virtual environments (MOVEs) have been gaining popularity for several years. Today, these complex networked applications are serving thousands of clients simultaneously. However, these MOVEs are typically hosted on specialized server clusters and rely on internal knowledge of the services to optimize the load balancing. This makes running MOVEs an expensive undertaking as it cannot...
While mobile nodes (MNs) undergo handovers across inter-wireless access networks, their contexts must be propagated for seamless re-establishment of on-going application sessions, including IP header compression, secure mobile IP, authentication, authorization, and accounting services, to name a few. Routing contexts via an overlay network either on-demand or based on prediction of an MNs' mobility,...
In this paper, we address the problem of collaborative video caching in ad hoc mobile networks. We consider network portraying static video server with wired interface to gateway node that is equipped with wireless interfaces, other nodes are requiring access to the video streams that is stored at video server. In order to reduce the average access latency as well as enhance the video accessibility,...
The efficiency and the performance of management systems is becoming a hot research topic within the networks and services management community. This concern is due to the new challenges of large scale managed systems, where the management plane is integrated within the functional plane and where management activities have to carry accurate and up-to-date information. We defined a set of primary and...
Monitoring the end-to-end Quality-of-Service (QoS) is an important work for service providers' Operation Support System (OSS), because it is the fundamental requirement for QoS provisioning. However, it is in fact a challenging work, and there are few efficient approaches to address it. In this paper, for multi-protocol label switching (MPLS) virtual private networks (VPNs), we propose a queuing model...
This paper proposes a new model, based on mainstream game theory for the optimal configuration of services. We consider the case of reliable realtime P2P communications and show how the configuration of security mechanisms can be configured using game theoretical concepts, in which the defendant is played by the management plane having to face adversaries which play the attacker role. Our main contribution...
Providing inter-domain QoS guaranteed services is a huge challenge for operators and will bring new revenues to them. But, establishing end-to-end services requires a level of resource management that does not exist yet, even locally to an operator. Due to confidentiality and independence reasons, operators are afraid to cooperate which can not be avoided in the inter-domain context. We consider the...
Event handling is a management mechanism that provides means for the network to react on changes in the network conditions or performance. In the construction of a clean-slate management architecture, we consider this as a main building block. This paper proposes a fully distributed event distribution in a fully distributed environment: differently from existing works, no configuration is required...
The thin-client computing model has been recently regaining popularity in a new form known as the virtual desktop. That is where the desktop is hosted on a virtualized platform. Even though the interest in this computing paradigm is broad there are relatively few tools and methods for benchmarking virtual client infrastructures. We believe that developing such tools and approaches is crucial for the...
This paper presents a purely empirical approach to estimating the effective bandwidth of aggregated traffic flows independent of traffic model assumptions. The approach is shown to be robust when used in a variety of traffic scenarios such as both elastic and streaming traffic flows of varying degrees of aggregation. The method then forms the basis of two quality of service related traffic performance...
We investigate the use of gossip protocols to detect threshold crossings of network-wide aggregates. Aggregates are computed from local device variables using functions such as SUM, AVERAGE, COUNT, MAX and MIN. The process of aggregation and detection is performed using a standard gossiping scheme. A key design element is to let nodes dynamically adjust their neighbor interaction rates according to...
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