In software-defined networks (SDN), the separation of the control and data-plane moves the concurrency control from the data-plane to a separate, now logically centralized controller program. As a result, despite its intention to simplify programming, the separation forces the programmer to deal with a spectrum of concurrent events (e.g. execution of controller programs, in-flight packets), a t...

Software-defined networking (SDN) use cases commonly involve multiple applications that collectively drive the network. The use cases are growing bigger and more complex, raising the need to break them into more manageable and reusable small pieces, as the design principle of separation of concerns suggests. Simultaneously, new business models [2] are driving the use cases beyond the control of...

The future 5G wireless is triggered by the higher demand on wireless capacity. With Software Defined Network (SDN), the data layer can be separated from the control layer. The development of relevant studies about Network Function Virtualization (NFV) and cloud computing has the potential of offering a quicker and more reliable network access for growing data traffic. Under such circumstances, ...

H osted cloud computing has signif icantly lowered the barrier for creating new networked services. Likewise, experimental facilities such as the Global Environment for Network Innovations (GENI; www. geni.net) let researchers perform largescale experiments on a “slice” of shared infrastructure. By letting tenants share physical resources, virtualization is a key technology in these infrastruct...

Software Defined Networks (SDN) represent a major paradigm change in communications networks. It provides a level of abstraction and independence from the traditional networking practice that allows for a fast path of innovation and, specifically, opens new opportunities for Quantum Key Distribution (QKD) networks. In this contribution we explore the implications of this paradigm for the deploy...

Existing cellular networks suffer from inflexible and expensive equipment, complex control-plane protocols, and vendorspecific configuration interfaces. In this paper, we argue that software defined networking (SDN) can simplify the design and management of cellular data networks, while enabling new services. However, supporting many subscribers, frequent mobility, fine-grained measurement and ...