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The sector of telecommunications is undergoing a rapid change due to the diversity of technologies, competition between different operators, and the increasing request of services of video on demand (VoD). In this regard, the Next Generation Network (NGN) proves to be the tendency of several operators. Thus, each operator is forced to make his network more efficient to ensure the loyalty of his customers...
In order to manage Quality of Service (QoS) and energy efficiency in the optical access network, an online Dynamic Bandwidth Allocation (DBA) algorithm with adaptive sleep cycle is presented. This DBA algorithm has the ability to allocate an additional bandwidth to the end user within a single sleep cycle whose duration changes depending on the current buffers occupancy. The purpose of this DBA algorithm...
With the technology improvements, managing a large amount of multimedia objects such as audio, video, picture or a combination of these has become possible. Multimedia data needs more real time storage and high data transfer than traditional textual and numeric data. In addition to these requirements, significant amount of computation is demanded for multimedia applications to serve many users at...
Quality of Service (QoS) in networking is a way of managing the network resources effectively. QoS has been widely used in traditional network and can also be implemented in Software Defined Network (SDN). Software Defined Network is a new network paradigm that decouples the control plane from the data plane in the network and thus create a network that is scalable, dynamic and easily manageable....
Latency-critical workloads such as web search engines, social networks and finance market applications are sensitive to tail latencies for meeting Service Level Objectives (SLOs). Since unexpected tail latencies are caused by sharing hardware resources with other co-executing workloads, a service provider executes the latency-critical workload alone. Thus, the data center for the latency-critical...
As the Quality of Experience of video streaming can be greatly affected by parameters such as jitter, throughput, packet loss and delay, it is of great importance to assess the consequences low Quality of Service. Video artifacts are errors that can be displayed when multimedia streaming faces transmission difficulties. Blocking, ringing, motion compensation mismatch or false borders are some of the...
Current networks are multi-service packet-switched environments, very often based on Internet Protocol, where the provision of good quality services is a great challenge. The most popular service, offered by almost every network, is voice transmission. As a real-time service, it places high demands on bandwidth and delay. The paper describes selected network dimensioning problems for the voice over...
Cloud computing is used to provide memory and processing unit over the internet on pay-per-use basis. During the initial stage, the cloud computing environment faced complex problems due to multiplexing number of requests with available resources. The current state of the art is researchers have numerous solutions to resolve issues in handling CPU and RAM but, to the best of our knowledge; they have...
Software-Defined Networking (SDN) is an innovative approach to provisioning and delivering QoS (Quality of Service) services, yet it is still devoid of context-differentiating services. In this paper we propose a network application (Autonomic QoS Broker) and a controller module that implements the OpenVSwitch Database Management Protocol (OVSDB). These two components were implemented and validated...
Medical applications, along with Information and Communication Technology (ICT), have contributed with many solutions to support the treatment of SEPSIS. However, there are few solutions for the transport of sepsis data with Quality of Service (QoS). In this paper we propose a self-manageable architecture for the provision and delivery of sepsis data using Software-Defined Networking (SDN). To evaluate...
Context-oriented computing has introduced new challenges in Quality of Service (QoS) management since the diversity of applications, forms of access and the TCP/IP architecture model make it difficult to provide services aware of Quality of Experience (QoE). In view of that, we propose an autonomous architecture of service provision and delivery that is QoE aware. The proposed components were designed...
Recent advances in Intrusion Risk Assessment (IRA) have brought promising solutions to enhance Intrusion Response Systems (IRS). However, current researches lack reasonable solutions to exploit system state information. Without the system state, the IRA results may suffer from the high false rate of Intrusion Detection Systems (IDS). To address this limitation, we propose a novel State-Aware Risk...
Fast growth and development of software defined network (SDN) and data transmission technologies set high requirements to the quality of service (Quality of Service, QoS) of network applications, high-speed and reliable data exchange between nodes of telecommunication system with strict requirements to delays of information transmission. The exact definition of the optimal transmission route allows...
Nowadays the traditional architecture of computer networks (CN) requires big resources for support of transmission of growing data flows for large number of devices taking into account quality of service (QoS). It allows to solve a wide range of tasks on the organization of data exchange, providing development of information society. Complexity in service of CN is combined often with incomplete compatibility...
Internet of Things (IoT) systems produce great amount of data, but usually have insufficient resources to process them in the edge. Several time-critical IoT scenarios have emerged and created a challenge of supporting low latency applications. At the same time cloud computing became a success in delivering computing as a service at affordable price with great scalability and high reliability. We...
The paper proposes a method of hierarchical QoS routing based on reservation of network resources. It describes the case of organization of distributed source routing when one of the border routers consistently solves two interconnected network tasks: calculation of the required routes and determination of the allocation order of link resource to be reserved in order to meet end-to-end QoS-requirements...
Deploying composite applications to Fog nodes in a QoS-and context-aware manner is challenging due to the heterogeneity and scale of Fog infrastructures. Application components must be provided with the software and hardware capabilities they need. Communication links that support interactions between components must meet certain QoS (latency and bandwidth). On the other hand, different Fog and Cloud...
When dealing with Quality of Experience (QoE) and in particular perceptual quality assessment and modeling, averaging is a common occurrence. For instance, the most commonly used measure of QoE is the aptly-called Mean Opinion Score (MOS), which is intended to represent an idealized average subject's rating of the quality. Another form of averaging occurs when choosing and preparing the samples used...
Given the growing demands for network services based sometimes on reduced resources, efficient solutions are continuously developed in order to operate the network infrastructures in optimum conditions. From network management viewpoint, the main challenge is related to traffic management solutions using data flow limitations for some specific users while giving higher priorities to others. If for...
WiFi networks play a significant role in providing today's wireless connectivity, therefore, understanding and improving WiFi network performance is important for today's mobile applications and services. Previous studies conducted to investigate WiFi network performance have generally been performed using specific types of WiFi networks in relatively small areas and have been limited by either the...
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