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In the last years, networking scenarios have been evolving, hand-in-hand with new and varied applications with heterogeneous Quality of Service (QoS) requirements. These requirements must be efficiently and effectively delivered. Given its static layered structure and almost complete lack of built-in QoS support, the current TCP/IP-based Internet hinders such an evolution. In contrast, the clean-slate...
Quality-to-Experience (QoE) refers to users' experience when using an application. Network operators typically focus on Quality-of-Service (QoS) metrics such as throughput, delay, and packet loss. However, these QoS metrics only matter if they impact users' experience of the application they are using. Therefore, it is crucial for network operators to monitor Quality of Experience (QoE). However,...
In P2P video streaming systems, the neighbor selection algorithm is one of the fundamental components that affects performance. Although a few neighbor selection methodologies have been proposed, none of them takes into consideration QoE metrics reported by peers as a parameter for decisions. In this work, we present a new metric that quantifies the QoE as a function of the number of absences of pieces...
This paper presents a new method for selection between replicated servers distributed over a wide area, allowing application and network providers to trade-off costs with quality-of-service for their users. First, we create a novel utility framework that factors in quality of service metrics. Then we design a polynomial optimization algorithm to allocate user service requests to servers based on the...
After several years of research towards sophisticated QoS measurement tools and methods, the results given to endusers by most commonly used on-line speed measurement tools are still far from being precise. In order to define a reliable Internet speed measurement methodology for endusers, the impact that the static and dynamic constraints of network nodes and TCP/IP implementations could impose must...
Previously dominating research on the Internet Quality of Service (QoS), focused on network performance, has now been shifted towards the customer experience. This paper addresses Quality of Experience (QoE) management issues in the future Internet. We provide a brief overview of QoE metrics and assessment methodologies, and discuss potential relationships between the QoE and network performance parameters...
In this paper, we present a framework for evaluating the QoE of a service that includes functional and non-functional service requirements. Non-functional requirements are classified into objective, subjective, and business parameters that affect Quality of Service (QoS), Quality of Experience (QoE), and Quality of Business (QoBiz), correspondingly. As those metrics have a strong dependency between...
To effectively utilize storage space of edge streaming media servers, cache policies are being studied. Unlike traditional work that focused on hit ratio and overall system bandwidth cost, this paper recognize different significance of users and propose the concept of caching utility as a new metric to evaluate caching strategies. A user based caching algorithm, USCS, involving differentiated service...
A good quality of experience (QoE) is a critical factor to the success of mobile Internet business for Internet Service Providers (ISPs) and Internet Content Providers (ICPs). Based on the analysis of social applications' communication mechanism on smart phone, we proposed a group of QoE indicators to evaluate the QoE of social business from the user's experience perception perspective. Then, we analyzed...
Autonomic Networking is seen as one of the hopes to improve the Quality of Service (QoS) provided to end users in the Internet. Especially in the context of Video on Demand (VOD), content and network providers have to deal with the dynamics of network and server loads which can severely impair the services provided to end users. Our recent research efforts seek to provide a remedy for this issue by...
Immersive, end-to-end applications using mixed multimedia data pose new requirements to the underlying network architecture. These requirements are related to two distinct categories of content delivery. Starting from the overlaying principles of the Future Internet Architecture, the network overlay principles and the Content Delivery Network approach we define our proposed architecture based on two...
Current high-performance capacity systems run hundreds of applications concurrently sharing the same network resources. In this scenario, system throughput and hence system utilization is significantly affected by inter-application contention. Quality-of-service (QoS) mechanisms are traditionally used in the Internet to provide different levels of performance guarantees. However, we have not found...
Current network architectures and solutions are about to reach the limits of sustainable developments. Research with respect to a Future Internet tackles many different aspects of networking. On one hand, with the evolution of virtualization techniques, a machine can be connected to several networks concurrently and on the other hand, the number of existing applications never stops increasing. Therefore,...
In order to facilitate the development of IoT-aware business processes that adapt to real-world context information, we present a novel modeling approach that reflects IoT quality information inherent in physical resources and maps them to the higher layers of enterprise information systems. Quality information is crucial to real-world applications, and is therefore part of standard real-world resource...
The measurement of worm propagation impact on network status remained an elusive goal. This paper analyzes the worm characteristics and network traffic and service, introduces evaluation metrics and presents a new method to assess the network situation under worm propagation. The applicability of this method is verified by simulated experiments with the network simulation tool LSNEMUlab test bed.
Over the years the Internet became the primary means of communication, many companies use it as basis for their services. However, the current Internet does not guarantee Quality of Service, emerging the concept of network virtualization as the basis for the Future Internet. A common strategy used by companies is to define a Service Level Agreement (SLA) with their respective Internet Service Providers...
Abstract-Content Distribution Network (CDN) involves several technologies, rather than just one technology working alone. CDN is another method to provide Quality of Service (QoS) to different applications and deliver different types of media content to end-users over the Internet. Since it is important to improve Internet performance in recent years, CDN has been an approach providing better Internet...
The Internet is based on a hop-by-hop routing model where forwarding decisions are based on a packet's destination. With the evolution of the Internet to support real-time applications such as video and audio distribution, the Internet's routing architecture must be enhanced to support metrics that ensure the quality-of- service requirements of these applications. Sobrinho has shown that some of these...
IEEE 802.11 appears as the most popular technology for wireless access because of its low cost and high data rates capacity. In the recent years a new communication paradigm emerged, called the Community Networking, which takes advantage of existing residential 802.11 access points and is based on sharing some part of the bandwidth to members of the community. We evaluate the 802.11 environment, the...
Service Level Objectives (SLOs) - the core of a Service Level Agreement (SLA) - reflect major Quality-of-Service (QoS) requirements of customers on a service for a given price. SLOs need to be updated, if those requirements change. This leads to an update of the SLO auditing implementation. However, in many existing implementations, efforts are required to adapt to SLO changes, and even more efforts...
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