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Dependability of computer and communication networks is an important aspect of the customer-provider relationship in the telecommunication industry. Considering the increasing interest in Software-Defined Networking (SDN) technologies, as well as unclear understanding of dependability in the context of traffic flows in such networks, it is not clear how to define the related objectives in Service...
Network Function Virtualization (NFV) enables flexible implementation and provisioning of network functions as virtual machines running on commodity servers. Due to the availability of multiple hosting servers, such network functions (also called Virtual Network Functions (VNFs)) can be placed where they are actually needed, dynamically migrated, duplicated, or deleted according to the current network...
This paper discusses the open issues in incorporating trust techniques in the NFV environment specified by the ETSI NFV Industry Specification Group, and analyses the available technologies to fill this gap. ETSI is developing security and trust specifications within its NFV-SEC working group, with the aim of establishing and assessing trust of both the hardware platform and the virtualised infrastructure...
The accuracy provided by traditional sampling-based monitoring approaches, such as NetFlow, is increasingly being considered insufficient to meet the requirements of today's networks. By summarizing all traffic for specific statistics of interest, sketch-based alternatives have been shown to achieve higher levels of accuracy for the same cost. Existing switches, however, lack the necessary capability...
Operating system level virtualization containers are commonly used to deploy virtual network functions (VNFs) which access the centralized network controller in software-defined networking (SDN) infrastructure. While this allows flexible network configuration, it also increases the attack surface, as sensitive information is transmitted between the controller and the virtual network functions. In...
Software-defined networking (SDN) addresses pressing networking problems such as network virtualization and data center complexity. By separating the control plane from the data plane, SDN introduces a new abstraction layer. This new abstraction layer is typically implemented by means of a so-called SDN controller. SDN applications can interact with the controller to ensure network functionality....
The majority of business activity of our integrated and connected world takes place in networks based on cloud computing infrastructure that cross national, geographic and jurisdictional boundaries. Such an efficient entity interconnection is made possible through an emerging networking paradigm, Software Defined Networking (SDN) that intends to vastly simplify policy enforcement and network reconfiguration...
Virtual data centers (VDCs) are among competitive advantages offered to businesses by cloud computing. Through VDCs, organizations can use a pool of on-demand virtual infrastructures in the form of a data center without paying the up-front costs of an actual data center. With the advent of software-defined networks (SDNs), it is now possible to provide the VDC's tenants with overlay SDNs to cover...
In the New Radio Access Network architecture (New RAN), currently envisioned by 3GPP, the evolved NodeB (eNB) functions can be split between a Distributed Unit (DU) and Central Unit (CU). Furthermore, as per the Virtual RAN (VRAN) approach, such functions can be virtualised (e.g., in simple terms, deployed in virtual machines). In such scenario, the fronthaul network connecting DU and CU must fulfill...
5G does not only aim at higher capacity and lower latency than current 4G in mobile broadband networks, but also to increase the level of programmability, control and flexibility to meet the requirements from innovative use cases such as IoT, smart manufacturing, and immersive media. However, several difficulties still need to be overcome for a better technological adoption. To reduce the time-to-market...
With the evolution towards the Fifth Generation of Mobile Communications (5G), Software-based Networks are paving the way to a radical transformation of Network Operators infrastructures. Novel technologies like Network Function Virtualisation (NFV) and Software Defined Network (SDN) are enabling new way of managing on-demand network resources. Focusing on the Mobile Core Network architecture, Service...
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