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The Cognitive Radio (CR) is able to adapt its operation to maximize an assumed utility function. It can be performed by appropriate resource management, according to the collected electromagnetic situation awareness. One of the most important features of the CR is the Dynamic Spectrum Access (DSA), where the CR have some autonomy to make decisions about the spectrum usage. First, the CR must know...
Digital communication at sea in the high north is challenging as the conventionally used geostationary satellite systems operate close to their geographic limits which is around 80 degrees latitude. The only system that provides digital communication capabilities beyond this limitation is Iridium. The MARENOR project has investigated the actual quality of service of communication systems in the high...
Novel applications running on top of wireless sensor networks set new QoS requirements, demand devices' seamless connectivity, and call for new communication paradigms such as opportunistic spectrum access. However, realization of opportunistic spectrum access without causing interference to primary users poses significant challenges that are further exacerbated by the power constrained nature of...
Anycast is an effective technique to select system servers among many and by spreading client requests achieve high performance and scalability. In our previous work, we presented the Global Application Layer Anycast (GALA) system. By combining real time network distances measures and geolocation, it performed better than its inherited algorithm, GAA. In this work we analyze how fast the GALA algorithm...
This paper describes advanced networking technologies that support high quality video and image communications. We focus on maintaining Internet compatibility and extracting the merit of ATM technologies. A concept of Global Mega-media Network (GMN) is introduced as the future multimedia network. As part of work associated with GMN, an overview of AMInet project and some of the promising technologies...
This paper presents an innovative control based Traffic Controller which provides at sharing a single resource, namely the available bit rate, among a set of IP flows characterized by different Quality of Service (QoS) requirements. The main novelty behind the proposed Traffic Controller is that it relies on an original control based approach which exploits a closed-loop architecture and a fuzzy tuner...
Smart Grid (SG) can be described as the concept of modernizing the traditional electrical grid. Through the addition of SG technologies traditional electrical grids become more flexible, robust and interactive, and are able to provide real time feedback by employing innovative services and products together with communication, control, intelligent monitoring, and self-healing technologies. For being...
In Heterogeneous Wireless Networks (HWN), providing seamless connectivity is one of the key issues. To achieve this, an efficient vertical handoff algorithm has to be designed, which takes an account of network condition detection in terms of Quality of Service (QoS) parameters to choose the better network to maintain connectivity. This paper proposes a Seamless Vertical Handoff Decision algorithm...
The research trends in computer and wireless communication networks are growingly facilitated with the emergence of various Network Simulation tools. Network simulation software enables users to model network behavior demonstrating the packet transmission behavior and interaction amongst the nodes. These models are further used to analyze and predict the behavior of a computer network on various devices...
A fast terminal sliding mode (FTSM) observer is proposed to estimate the anomaly seen as an external disturbance perturbing into the queue dynamics in the TCP/IP networks. The TCP traffic dynamic behaviour, which is represented by a TCP/IP fluid-flow model, can be captured by the observer in the router level. A smooth control signal for the observer based on the fast TSM strategy is obtained and directly...
The Voice over IP (VoIP) service demands high priority over other services and applications. Some constrains are associated with this real-time service, such as delay and throughput which need to be addressed before delivering to the customer. The mobility in IP networks is a demand that facilitates IP applications and services, especially in wireless networks. This paper demonstrates the performance...
In this paper the method of prioritized queue processing MPQ (modified priority-based queuing) is investigated. This method allows fulfilling QoS requirements for packets of real-time flows that have sustained some particular degree of the delay en-route. In order to test this method, the test bed that consists of virtual routers and traffic generators has been developed. Running experiments on this...
Flow-Aware Multi-Topology Adaptive Routing (FAMTAR) is a new mechanism which provides the ability to use multiple paths between two points in a network. When the primary path becomes congested, a new path is found and used. However, when all possible paths are congested, new flows are still accepted on one of the congested paths which degrades the observed quality of service. Therefore, in this paper,...
Mobile data traffic has increased drastically during last few years and expected to increase multifold in the coming years. Heterogeneous wireless networks have made it possible to have simultaneous traffic flows on all available wireless accesses. IP Flow Mobility (IFOM) which has been standardized from 3GPP Release 10 provides possibility to seamlessly transfer individual flows from one access to...
Data traffic in Mobile networks is increasing exponentially since last few years and is projected to increase multifold before the end of this decade. Evolution in heterogeneous wireless networks and network based mobility protocols has enabled the usage of simultaneous traffic flows on all available wireless accesses. Standardization of IP Flow Mobility (IFOM) from 3GPP Release 10 provides possibility...
DOCSIS® 3.1 systems were designed to achieve high capacities with predictable Quality of Service (QoS) promising 2 Gbps on the upstream and 10 Gbps on the downstream. This paper describes L2VPN business services over DOCSIS® 3.1, extension of MPLS to customer premise, virtualization of Customer Premises Equipment (CPE) and interaction of the L2VPN application with SDN controller to support business...
In this paper we give some background to how the long-lasting discussion on separation of identifiers and locators in networking has influenced the Information-centric Networking (ICN) research. We start with a historical retrospect of the id/locator discussion. We then address the problems that have been fueling the discussion followed by a chronological walkthrough of a number of id/locator split...
Resource management is one of the most indispens- able components of cluster-level infrastructure layers. Users of such systems should be able to specify their job requirements as a configuration parameter (CPU, memory, disk I/O, network I/O) that are translated into an appropriate resource reservation and resource allocation decision by the resource management function. YARN is an emerging resource...
Evolutions of communications and the advent of Web real time technologies are further challenging the Telco ecosystem. New architectures are emerging to enable new services in a context where assets as identity, signaling and network management are decoupled and virtually delaminated, so to speak. This paper tackles three challenges to face to enable Telco to embrace these evolutions. First we need...
QoS provisioning is one of the key challenges facing current as well as future Internet architectures. Its dependency on content recognition does not allow a straightforward support of QoS in the IP, host-centric, model. In contrast, Information-Centric Networking (ICN) offers native content identification in the network, which can be exploited to develop a common, elegant, framework for supporting...
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