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Introduction
My research work focuses on adaptive mechanisms in large-scale dynamic systems. These mechanisms are based on context-enhanced knowledge, Network Functions Virtualization (NFV) and also on Software-Defined Networking (SDN).
Publications
Publications (69)
In this chapter, the authors conduct a background review of eventual consistency models in modern distributed data store systems. They present their adaptive and continuous Quorum‐based consistency model for the distributed ONOS controllers in large‐scale deployments. Modern distributed database systems supporting standard eventual consistency mode...
The proposed software‐defined networking (SDN) controller placement scheme uses heuristics with low computation time in order to deal with such large‐scale and dynamic network environments where fast reevaluations of controller placement configurations are required to adapt in real‐time to frequently changing network conditions. The potential of su...
Current SDN controller platform designs employ conventional strong consistency models so that the SDN applications running on top of the distributed controllers can benefit from strong consistency guarantees for network state updates. This chapter proposes an adaptive multi‐level consistency model for the distributed ONOS controllers following the...
This chapter presents a survey on software‐defined networking (SDN) with a special focus on distributed SDN control. It discusses a physical classification of state‐of‐the‐art SDN control plane architectures into centralized and distributed in order to highlight the SDN performance, scalability and reliability challenges. The chapter also presents...
This chapter provides a thorough discussion of the major challenges of distributed SDN control, along with some insights into emerging and future trends in this area. These challenges include the issues of scalability, reliability, state consistency, interoperability, monitoring and security. Scalability concerns in SDN may arise from the decouplin...
In the years since its initiation, the software-defined network paradigm has evolved into a distinguished networking technology by causing a revolution in separating the control logic from physical devices and centralizing software-based controllers. Despite its indisputable benefits compared with the traditional network, the SDN raises the challen...
Software-Defined Networking (SDN) brought a groundbreaking idea to facilitate network system management by decoupling and abstracting the Control plane and Data plane of traditional networks. The centralised control offers network administrators many benefits such as a global view of the network, programmability, dynamic updating of forwarding rule...
With the rapid growth of fifth-generation (5G), network operators have met with difficulties in ensuring user satisfaction due to diverse service-level agreement (SLA) requirements. Application-aware routing is able to potentially address this issue in implementing differentiated routing policies corresponding to various applications. To facilitate...
Exposure to contaminated water during aquatic recreational activities can lead to gastrointestinal diseases. In order to decrease the exposure risk, the fecal indicator bacteria Escherichia coli is routinely monitored, which is time-consuming, labor-intensive, and costly. To assist the stakeholders in the daily management of bathing sites, models h...
To control coronavirus disease 2019 (COVID-19), most countries have opted for a containment policy. When a decision of decontainment has to be taken, a question emerges regarding the digital strategy to adopt: Should we track citizens? All of them or only persons who contracted COVID-19? Should we take measures to protect elderly people or people s...
To control coronavirus disease 2019 (COVID-19), most countries have opted for a containment policy. When a decision of decontainment has to be taken, a question emerges regarding the digital strategy to adopt: Should we track citizens? All of them or only persons who contracted COVID-19? Should we take measures to protect elderly people or people s...
To control coronavirus disease 2019 (COVID-19), most countries have opted for a containment policy. When a decision of decontainment has to be taken, a question emerges regarding the digital strategy to adopt: Should we track citizens? All of them or only persons who contracted COVID-19? Should we take measures to protect elderly people or people s...
This paper aims to propose a deployment solution for Content-Centric Delivery Networks (C-CDN) based on the SDN technology in an IoT-like environment. To meet today’s network requirements in terms of reliability, scalability and performance and to match the specific IoT needs, the SDN architecture needs to be physically-distributed, but logically-c...
The rise of Smart Communications in Network Technologies has led to the growth of intelligent communications domains embedded in complex systems for a wide variety of applications in the next generation of network and cloud computing technologies. Indeed, autonomous systems embedded in complex configurations and dynamic environments have developed...
In the coming years, the development of the Internet of Things (IoT) will have relevance for transport, environment, health care, smart cities and also multimedia services (Multi-media Internet of Things (MIoT)). Nowadays, many services including those of the IoT and MIoT encrypt the data to make it secure during the transmission. However, it impos...
Software-defined Network (SDN) is considered as a revolutionary paradigm shift of computer networks in bringing programmable networks and control-data plane separation. Over the last decade, SDN has received a remarkable attention from the networking society. However, much of the previous research is based on Mininet, Maxinet, One and DOT to simula...
In this paper, we propose a new adaptive bit rate (ABR) streaming method. This method is based on estimating and monitoring users' video streaming experience, their quality of experience (QoE). This ensures a good user QoE and optimises bandwidth utilisation by monitoring video buffer fill rate to ensure minimal data traffic. First, we achieve a Qo...
This paper addresses the knowledge dissemination problem in distributed SDN control by proposing an adaptive and continuous consistency model for the distributed SDN controllers in large-scale deployments. We put forward a scalable and intelligent replication strategy following Quorum-replicated consistency: It uses the read and write Quorum parame...
A Content Delivery Network (CDN) is able to handle high traffic and offer reliable services by geographically bringing content data to the edge network, where replica servers are installed closer to end-users. Traditional CDN architecture lacks a global view of the whole network and thus cannot dynamically and optimally perform the server selection...
Logically-centralized but physically-distributed SDN controllers are mainly used in large-scale SDN networks for scalability, performance and reliability reasons. These controllers host various applications that have different requirements in terms of performance, availability and consistency. Current SDN controller platform designs employ conventi...
Images, Signaux et Systèmes Intelligents (LISSI)-EA 3956 Thèmes-Informatique, Imagerie, Communication. Résumé-Pour garantir un meilleur service, les acteurs de l'Internet se sont intéressés cesdernì eres annéesannéesà une nouvelle idée qui consistè a intégrer le ressenti réel de l'usager dans la boucle de contrôle des dif-férents services proposés....
With the massive uses of the video over the world in the last decade, the user perception, commonly called Quality of Experience (QoE) metric; has become the one of the most important topics for the Network services Providers (NsP) and Content service Providers (CsP). In this paper, we present a new QoE estimation method on the client side using Ma...
As opposed to the decentralized control logic underpinning the devising of the Internet as a complex bundle of box-centric protocols and vertically-integrated solutions, the SDN paradigm advocates the separation of the control logic from hardware and its centralization in software-based controllers. These key tenets offer new opportunities to intro...
The decoupling of control and data planes in Software-Defined Networking (SDN) brings benefits in terms of logically centralized control and application programming. But, the single point of management in physically centralized SDN architectures is a potential point of failure and a bottleneck that compromises network reliability and performance. S...
Conventional network control mechanisms are no longer suitable for Internet of Things (IoT) because they don’t allow scalability with a guarantee of Quality of Experience (QoE) especially when it comes to the health sector characterized by its real time and critical life aspects. That’s why we need to think differently about control. One aspect con...
Nowadays, Network Operators (NOs) and Service Providers (SPs) are more interested by the user's satisfaction measurement because their businesses are highly dependent on the user's satisfaction. Generally, the traditional strategies to measure the user's perception are based on Quality of Service (QoS), which is not sufficient to reflect the real u...
The tremendous growth in video services, specially in the context of mobile usage, creates new challenges for network service providers: How to enhance the user's Quality of Experience (QoE) in dynamic wireless networks (UMTS, HSPA, LTE/LTE-A). The network operators use different methods to predict the user's QoE. Generally to predict the user's Qo...
To ensure the best multimedia service quality in order to well address users' expectations, a new concept named Quality of Experience (QoE) has appeared. Two methods can be used to evaluate the user satisfaction, a subjective one and an objective one. The subjective approach is based on measured real data. The problem is there is no dataset large e...
Quality of Service (QoS) optimization are not sufficient to ensure users needs. That’s why, operators are investigating a new concept called Quality of Experience (QoE), to evaluate the real quality perceived by users. This concept becomes more and more important, but still hard to estimate. This estimation can be influenced by a lot of factors cal...
A main objective of Information Centric Network (ICN) is to improve the network by placing the knowledge in center of network design. This vision of the network needs an efficient distributed and decentralized knowledge plane. So, an important amount of knowledge should be disseminated over the supervised network, which remains an open problem. Ind...
La croissance du réseau Internet, l'émergence de nouveaux besoins par l'avènement des terminaux dits intelligents (smartphones, tablettes tactiles, etc.) et l'apparition de nouvelles applications sous-jacentes induisent de nombreuses mutations dans l'usage de plus en plus massif des technologies de l'information dans notre vie quotidienne et dans t...
A main objective of an Information Centric Network (ICN) is to improve the network by placing the knowledge in center of the network design. This vision of the network needs an efficient distributed and decentralized knowledge plane. So, an important amount of knowledge should be disseminated over the supervised network, which remains an open probl...
The micro grid is a small intelligent electricity network (power grid) that uses computer technology to optimize production, distribution, and consumption and can operate independently by managing "intelligently" its own expenses and production capacity. The main objective is to ensure the best user perception without any human monitoring based on...
Autonomic computing is a new paradigm inspired by the biological world. It aims at making a network independent of any human monitoring. To reach such autonomy, knowledge should be disseminated over the network, which remains an open problem. Our solution consists in proposing a new model of knowledge dissemination based on three key ideas: a hiera...
Autonomic Networks represent a concept inspired by the biological world that aims at making a network independent of any human monitoring. To reach such autonomy, knowledge should be disseminated over the network, which remains an open problem. In fact, disseminating the knowledge over all nodes leads to a big overhead. That is why we need to selec...
The most important tendency of future Internet architectures is maintaining the best Quality of Experience (QoE), which represents the subjective perception of end-users using network services with network functions such as admission control, resource management, routing, traffic control, etc. Among of them, we focus on routing mechanism driven by...
Autonomic computing is a new paradigm inspired by the biological world. It allows networks to self-organize control decisions. To ensure an efficient self-organization, an autonomic network must define a new distributed and decentralized plane containing all the network knowledge, called "knowledge plane". In this paper, we propose a new knowledge...
