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SDN and NFV
Published in Dijiang Huang, Ankur Chowdhary, Sandeep Pisharody, Software-Defined Networking and Security, 2018
Dijiang Huang, Ankur Chowdhary, Sandeep Pisharody
As the name suggests, NFV is the process of moving network services like firewalls, Network Address Translation (NAT), load balancing, Intrusion Detection System (IDS), etc. from dedicated physical hardware into services on a virtualized environment. The movement to virtualize is not limited to network functions, and is part of the broader shift in computing industry to better employ the immense gains in hardware capabilities. Generally, NFV does not introduce changes to existing protocols, and can be implemented incrementally. SDN, on the other hand seeks to introduce flexibility, dynamism and automation into the deployment and management of network objects by decoupling and centralizing the network intelligence from the packet-forwarding process. While it is possible to virtualize network functions without using SDN concepts and to realize an SDN that does not use NFV, there are inherent synergies in leveraging SDN to implement and manage an Network Function Virtualization Infrastructure (NFVI); leading to SDN and NFV being considered symbiotic paradigms.
Network Architecture, Mobility Management, and Deployment
Published in Saad Z. Asif, 5G Mobile Communications Concepts and Technologies, 2018
NFV and SDN are essential in 5G networks to reduce costs and bring added value to network infrastructure. NFV is the process of moving/forwarding tasks such as load balancing, firewalls, and so on away from dedicated hardware into a virtualized environment [15]. NFV enables the execution of software-based network function on general purpose hardware by leveraging virtualization techniques. The virtualization technologies allow breakup of the software of network functions from dedicated hardware [16]. Softwarization allows implementation of network functions in software, including virtualization of such functions and programmability by setting appropriate interfaces. It is an approach to use software programming to design, implement, and maintain network equipment and services. In SDN, the control plane is decoupled from the data plane and is managed by a logically centralized controller that has a holistic view of the network [11]. Softwarization in RAN may allow some functions such as PDCP and RRC to be implemented as VNFs. Softwarization can also be used to implement certain core and transport functions. The original aim of combining NFV and SDN was to decouple services from physical resources allowing flexibility and adaptability in the network. When NFV and SDN come together, they provide the additional benefit of detaching lifecycle management from physical constraints [16].
Bandwidth Allocation Scheme with QoS Provisioning for Heterogeneous Optical and Wireless Networks
Published in Mahmoud Elkhodr, Qusay F. Hassan, Seyed Shahrestani, Networks of the Future, 2017
Siti H. Mohammad, Nadiatulhuda Zulkifli, Sevia Mahdaliza Idrus, Arnidza Ramli
5G is realized as one of the qualifiers of what is denoted as “networked society” (i.e., a future with user- and machine-centric communications where access to information and sharing of data is ubiquitous) (Fiorani et al., 2015). To further increase the data rates, the 3GPP Release 12 in June 2014 introduced new technologies such as network function virtualization (NFV), software-defined networks (SDNs), and heterogeneous networks (HetNets) (Mitchell, 2014). NFV enables the separation of hardware from software or “function,” whereas SDN is an extension of NFV wherein software can perform dynamic reconfiguration of network topology to adjust to load and demand. On the other hand, small-cell deployments are a key feature of the HetNets approach as they allow flexibility as to where they are positioned. Although such technologies can potentially address the greedy 5G capacity requirements and reduced RAN-related capital and operational expenditures (CapEX and OpEX), a new challenge has nonetheless emerged: the 5G backhaul (Jaber et al., 2016).
An Optimal Reinforced Deep Belief Network for Detection of Malicious Network Traffic
Published in IETE Journal of Research, 2023
The 5G IoT device will become the upcoming trend that faces the domains of energy, transportation, retail, manufacturing, etc [5]. In 5G, the Software Defined Networking (SDN) and Network Function Virtualization (NFV) facilitate the services of orchestration and dynamic creation as needed based on network slicing in the general physical infrastructure and offer flexibility, elasticity, scalability, programable and dynamic configuration. Therefore, 5G IoT has the capability of programmability and notarization that allows IoT to create new entities [6]. Network traffic research is the method that disrupts and inspects the messages for detecting the information from models. The study of network traffic is an important system for efficient problem solving to help the network facilities and network traffic processing is an automatic technique for determining the dynamic network traffic behavior using random processes [7]. The classification of network traffic is essential in the fast development of present computer networks [8]. Around 80% of internet traffic refers to peer-to-peer uses and the classification of network traffic can improve security, quality, network licensing, and accounting.
Virtualised Environment for Learning SDN-based Networking
Published in IETE Journal of Education, 2020
Oscar Polanco, Fabio G. Guerrero
The principle proposed by SDN for the control plane has been identified by the ITU as an important concept to be extended to user and management planes. This concept, which is called “softwarization,” is a part of the requirements identified for IMT-2020 systems (International Mobile Telecommunications) by study group 13 [5]. Network functions virtualisation (NFV),[6] decouples network functions such as routing, firewall, intrusion detection, and NAT (Network Address Translation) from proprietary hardware platforms, and implements them in software. It uses standard virtualisation technologies that run on high-performance common hardware (non-proprietary) to virtualise network functions. NFV is applicable to any processing in the data plane or to any function in the control plane, in both wired and wireless network infrastructures. NFV has several features in common with SDN because they share the following objectives: moving functions to a software, using common hardware platforms instead of proprietary platforms, using APIs, and more efficiently supporting the implementation of network functions. In addition, SDN and NFV are independent but complementary schemes. In order to make a clear distinction between SDN and NFV, it should be noted that SDN decouples data and control planes, making the control and routing of network traffic more flexible and efficient. In contrast, NFV decouples the network functions from the specific hardware platforms through virtualisation, and provides these functions by using generic hardware platforms.
An efficient exact approach for the constrained shortest path tour problem
Published in Optimization Methods and Software, 2020
Daniele Ferone, Paola Festa, Francesca Guerriero
One of the main applications of can be found in the domain of Network Functions Virtualization (NFV). NFV decouples the network service functionality from the underlying network, compute, and storage resources, and allows communications services to be composed by stitching together functional building blocks that may not be co-located and can be offered by different providers. Orchestration is the process of arranging and coordinating multiple network services to deliver the desired functionality. Orchestration relies on a ‘marketplace of services’: a repository of services and network functionalities that are available to users. An NFV marketplace planner has to construct a path from a source to destination that visits virtual nodes where instances of these services have been deployed.