Software Defined Networking (SDN) has gained significant attention from network researchers and industry in recent years. Indeed, the SDN concept provides many advantages such as programmability and easy management of the network. However, it generates new challenges as scalability and performances issues, understanding in-depth the performances and limitations of the SDN concept is a prerequis...

—Real-Time Online Interactive Applications (ROIA), e.g., multiplayer online games and simulation-based e-learning, make high Quality of Service (QoS) demands on the underlying network. These demands depend on the number of users and the actual application state and, therefore, vary at runtime. Traditional networks have very limited possibilities of influencing the network behavior to meet the ...

Software defined networks (SDN) has been proposed to monitor and manage the communication networks globally. SDN revolutionized the way the communication network managed previously. By segregating the control plane from the data plane, SDN helps the network operators to manage the network flexibly. Since smart grid heavily relies on communication networks, therefore, SDN has also paved its way ...

Software-Defined Networking (SDN) allows to control the available network resources by an intelligent and centralized authority in order to optimize traffic flows in a flexible manner. However, centralized control may face scalability issues when the network size or the number of traffic flows increases. Also, a centralized controller may form a single point of failure, thereby affecting the ne...

Data networks have become increasingly complex nowadays. Even though technologies like Ethernet, IP protocol and packet forwarding is rather simple, control mechanisms like middleboxes, Access Control Lists (ACLs), firewalls, traffic engineering, VLANs, etc. have largely contributed to increasing their complexity. Primarily this is due to the lack of basic principles in networking. Networking s...

Software-defined networking (SDN), and in particular networks based on an OpenFlow control plane, are expected to take significant share in upcoming deployments. Network programmability has emerged as a particularly desirable property for such new deployments, in which logically centralized software will be able to both control and manage operation. This paper focuses on one aspect of network m...

Software-defined networking (SDN) refactors the distributed network protocols in the network into an ensemble of centralized programs running at a server (controller) that is separate from the network, creating a rare opportunity to simplify network management with modern software engineering. Yet the SDN software architecture, which often requires coordination among multiple entities over shar...

Network virtualization allows for an abstraction between user and physical resources by letting a given physical infrastructure to be shared by multiple service providers. However, network virtualization presents some challenges, such as, efficient resource management, fast provisioning and scalability. By separating a network’s control logic from the underlying routers and switches, software d...

Context and situational awareness are key features and trends of the smart grid and enable adaptable, flexible and extendable smart grid services. However, the traditional hardware-dependent communication infrastructure is not designed to identify the flow and context of data, and it focuses only on packet forwarding using a pre-defined network configuration profile. Thus, the current network i...