Academic literature on the topic 'Network functions virtualization'

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Journal articles on the topic "Network functions virtualization"

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MAKSYMYUK, Taras, Volodymyr ANDRUSHCHAK, Stepan DUMYCH, Bohdan SHUBYN, Gabriel BUGÁR, and Juraj GAZDA. "BLOCKCHAIN-BASED NETWORK FUNCTIONS VIRTUALIZATION FOR 5G NETWORK SLICING." Acta Electrotechnica et Informatica 20, no. 4 (January 21, 2021): 54–59. http://dx.doi.org/10.15546/aeei-2020-0026.

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The paper proposes a new blockchain-based network architecture for 5G network functions virtualization. By using a combination of AI and blockchain technologies, proposed system provides flexible network deployment, interoperability between different mobile network operators and effective management of radio resources. Experimental testbed of the proposed system has been implemented by using cloud and edge computing infrastructure and software defined radio peripheral NI USRP 2900. Simulation results of the network slicing and radio resource management shows that proposed system is able to double the capacity of the physical network infrastructure, while ensuring the target quality of service for all users.
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Gil Herrera, Juliver de Jesus, and Juan Felipe Botero Vega. "Network Functions Virtualization: A Survey." IEEE Latin America Transactions 14, no. 2 (February 2016): 983–97. http://dx.doi.org/10.1109/tla.2016.7437249.

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Chatras, Bruno, and François Frédéric Ozog. "Network functions virtualization: the portability challenge." IEEE Network 30, no. 4 (July 2016): 4–8. http://dx.doi.org/10.1109/mnet.2016.7513857.

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Daghmehchi Firoozjaei, Mahdi, Jaehoon (Paul) Jeong, Hoon Ko, and Hyoungshick Kim. "Security challenges with network functions virtualization." Future Generation Computer Systems 67 (February 2017): 315–24. http://dx.doi.org/10.1016/j.future.2016.07.002.

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DJOMI, MANZILA IZNIARDI, RENDY MUNADI, and RIDHA MULDINA NEGARA. "Analisis Performansi Layanan FTP danVideo Streaming berbasis Network Function Virtualization menggunakan Docker Containers." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 6, no. 2 (July 9, 2018): 180. http://dx.doi.org/10.26760/elkomika.v6i2.180.

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ABSTRAKInfrastruktur jaringan seperti router, secara tradisional menggunakan hardware yang bersifat proprietary. Teknologi virtualisasi pada fungsi jaringan atau NFV (Network Function Virtualization) membuat layanan ini dapat diimplementasikan sebagai aplikasi perangkat lunak yang dapat dijalankan di lingkungan virtual atau Virtualized Network Functions (VNFs). Selain menggunakan hypervisor (hardware-level virtualization), teknologi virtualisasi memiliki alternatif pengimplementasian dengan menggunakan teknologi containers (Operating system -level virtualization), salah satunya menggunakan Docker. Penelitian ini mengimplementasikan layanan FTP dan video streaming pada jaringan NFV di Docker Containers. Tanpa backgound traffic, layanan menunjukkan performansi QoS yang memenuhi standarisasi ITU-T G.1010 dengan delay FTP 0,12 ms dan delay video streaming 6,21 ms serta nilai packet loss kedua layanan sebesar 0%. Penggunaan CPU pada Docker ketika layanan dijalankan dibawah 1 %. Kata kunci: Virtualisasi, Containers, Docker, Network Function Virtualization, QoSABSTRACTNetwork infrastructure such as routers, traditionally using proprietary hardware. Virtualization technology on network function or NFV (Network Function Virtualization) makes this service can be implemented as a software application that can run in virtual environment or Virtualized Network Functions (VNFs). In addition to using hypervisor (hardware-level virtualization), virtualization technology has an alternative implementation using containers technology (Operating system-level virtualization), one of them using Docker. This research implements FTP and video streaming services on NFV networks in Docker Containers. Without background traffic, the service demonstrates QoS performance that meets the ITU-T G.1010 standardization with 0.12 ms FTP delay and 6.21 ms video streaming delay and with packet loss value of both services at 0%. CPU usage on Docker when service runs below 1%.Keywords: Virtualization, Containers, Docker, Network Function Virtualization, QoS
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Niedermeier, Michael, and Hermann de Meer. "Constructing Dependable Smart Grid Networks using Network Functions Virtualization." Journal of Network and Systems Management 24, no. 3 (April 22, 2016): 449–69. http://dx.doi.org/10.1007/s10922-016-9380-1.

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Pencheva, Evelina, Ivaylo Atanasov, and Ventsislav Trifonov. "Towards Intelligent, Programmable, and Open Railway Networks." Applied Sciences 12, no. 8 (April 17, 2022): 4062. http://dx.doi.org/10.3390/app12084062.

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The virtualization and automation of network functions will be key features of future high-speed railway networks, which have to provide dependable, safe, and secure services. The virtualization of railway network functions will enable functions such as train control, train integrity protection, shunting control, and trackside monitoring and maintenance to be virtualized and to be run on general-purpose hardware. Network function virtualization combined with edge computing can deliver dynamic, low-latency, and reliable services. The automation of railway operations can be achieved by embedding intelligence into the network to optimize the railway operation performance and to enhance the passenger experience. This paper presents an innovative railway network architecture that features distributed intelligence, function cloudification and virtualization, openness, and programmability. The focus is on time-tolerant and time-sensitive intelligent services designed to follow the principles of service-oriented architecture. The interaction between identified logical identities is illustrated by use cases. The paper provides some details of the design of the interface between distributed intelligent services and presents the results of an emulation of the interface performance.
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Miyamura, Takashi, Akira Misawa, and Jun-ichi Kani. "Highly efficient optical aggregation network with network functions virtualization." International Journal of Network Management 29, no. 2 (November 11, 2018): e2052. http://dx.doi.org/10.1002/nem.2052.

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Femminella, Mauro, and Gianluca Reali. "Implementing Internet of Things Service Platforms with Network Function Virtualization Serverless Technologies." Future Internet 16, no. 3 (March 8, 2024): 91. http://dx.doi.org/10.3390/fi16030091.

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The need for adaptivity and scalability in telecommunication systems has led to the introduction of a software-based approach to networking, in which network functions are virtualized and implemented in software modules, based on network function virtualization (NFV) technologies. The growing demand for low latency, efficiency, flexibility and security has placed some limitations on the adoption of these technologies, due to some problems of traditional virtualization solutions. However, the introduction of lightweight virtualization approaches is paving the way for new and better infrastructures for implementing network functions. This article discusses these new virtualization solutions and shows a proposal, based on serverless computing, that uses them to implement container-based virtualized network functions for the delivery of advanced Internet of Things (IoT) services. It includes open source software components to implement both the virtualization layer, implemented through Firecracker, and the runtime environment, based on Kata containers. A set of experiments shows that the proposed approach is fast, in order to boost new network functions, and more efficient than some baseline solutions, with minimal resource footprint. Therefore, it is an excellent candidate to implement NFV functions in the edge deployment of serverless services for the IoT.
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Ma, Shicong, Baosheng Wang, Xiaozhe Zhang, and Xianming Gao. "ApplianceBricks: a scalable network appliance architecture for network functions virtualization." China Communications 13, Supplement 1 (2016): 32–42. http://dx.doi.org/10.1109/cc.0.7560893.

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Dissertations / Theses on the topic "Network functions virtualization"

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Sällberg, Kristian. "A Data Model Driven Approach to Managing Network Functions Virtualization : Aiding Network Operators in Provisioning and Configuring Network Functions." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171233.

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This master’s thesis explains why certain network services are difficult to provision and configure using IT automation and cloud orchestration software. An improvement is proposed and motivated. This proposed improvement enables network operators to define a set of data models describing how to provision and interconnect a set of Virtual Network Functions (VNFs) (and possibly existing physical network functions) to form networks. Moreover, the proposed solution enables network operators to change the configuration at runtime. The work can be seen as a step towards self managing and auto scaling networks. The proposed approach is compared to a well known cloud management system (OpenStack) in order to evaluate if the proposed approach decreases the amount of time needed for network operators to design network topologies and services containing VNFs. Data is collected through observations of network operators, interviews, and experiment. Analysis of this data shows that the proposed approach can decrease the amount of time required for network operators to design network topologies and services. This applies if the network operators are already acquainted with the data modeling language YANG. The amount of time required to provision VNFs so that they respond to connections can also be decreased using the proposed approach. The proposed approach does not offer as much functionality as OpenStack, as it is limited to VNF scenarios.
Denna masteruppsats förklarar varför vissa nätverkstjänster är svåra att skapa och konfigurera med IT-automationsverktyg och mjukvara för molnorkestrering.  En förbättring föreslås och motiveras. Den föreslagna förbättringen tillåter nätverksoperatörer att definiera en mängd datamodeller, för att beskriva hur Virtuella Nätverksfunktioner (VNF:er) skall instantieras och kopplas ihop till nätverkstjänster. Dessutom tillåter lösningen nätverksoperatörer att ändra konfiguration under tiden nätverken hanterar trafik.  Arbetet kan ses som ett steg mot självhanterande och automatiskt skalande nätverk. Den föreslagna lösningen jämförs med ett välkänt molnorkestreringsverktyg (OpenStack) för att utvärdera om den föreslagna lösningen sänker mängden tid som nätverksoperatörer behöver för att designa nätverkstopologier och tjänster som innehåller VNF:er. Data samlas in genom observationer av nätverksoperatörer, intervjuer, och experiment. Analys av datan visar att den föreslagna lösningen kan minska tiden som behövs för att designa nätverkstopologier och tjänster. Fallen där detta är applicerbart, är när VNF:er närvarar i nätverk. Dessa är enklare att skapa, konfigurera, och ändra under tiden de exekverar, med den föreslagna metoden. Detta kräver också att nätverksoperatören är bekant med datamodelleringsspråket YANG. Tiden det tar att provisionera VNF:er, tills dess att de svarar till anslutningar, kan sänkas med hjälp av den föreslagna metoden. Den förslagna metoden erbjuder väsentligt begränsad funktionalitet jämfört med OpenStack, den fokuserar på att hantera VNF:er.
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Nobach, Leonhard [Verfasser], Ralf [Akademischer Betreuer] Steinmetz, and Wolfgang [Akademischer Betreuer] Kellerer. "Seamless Flexibility in High-Performance Network Functions Virtualization / Leonhard Nobach ; Ralf Steinmetz, Wolfgang Kellerer." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2018. http://d-nb.info/117198815X/34.

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Hsieh, Cheng-Liang. "Design and Implementation of Scalable High-Performance Network Functions." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/dissertations/1416.

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Service Function Chaining (SFC) enriches the network functionalities to fulfill the increasing demand of value-added services. By leveraging SDN and NFV for SFC, it becomes possible to meet the demand fluctuation and construct a dynamic SFc. However, the integration of SDN with NFV requires packet header modifications, generates excessive network traffics, and induces additional I/O overheads for packet processing. These additional overheads result in a lower system performance, scalability, and agility. To improve the system performance, a co-optimized solution is proposed to implemented NF to achieve a better performance for software-based network functions. To improve the system scalability, a many-field packet classification is proposed to support a more complex ruleset. To improve the system agility, a network function-enabled switch is proposed to lower the network function content switching time. The experiment results show that the performance of a network function is improved by 8 times by leveraging GPU as a parallel computation platform. Moreover, the matching speed to steer network traffics with many-field ruleset is improved by 4 times with the proposed many-field packet classification algorithm. Finally, the proposed system is able to improve system bandwidth 5 times better compared the native solution and maintain the content switch time with the proposed SFC implementation using SDN and NFV.
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Kolluri, Saiphani Krishna Priyanka Kolluri. "APPLYING LEAN PRINCIPLES FOR PERFORMANCE ORIENTED SERVICE DESIGN OF VIRTUAL NETWORK FUNCTIONS FOR NFV INFRASTRUCTURE : Roles and Relationships." Thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13357.

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Context. Network Function Virtualization was recently proposed by European Telecommunications Standards Institute (ETSI) to improve the network service flexibility by virtualization of network services and applications that run on hardware. To virtualize network functions, the software is decoupled from underlying physical hardware. NFV aims to transform industries by reducing capital investments on hardware by using commercial-of-the-shelf (COTS) hardware. NFV makes rapid innovative growth in telecom services through software based service deployment. Objectives. This thesis work aims to investigate how business organizations function and the roles in defining a service relationship model. The work also aims to define a service relationship model and to validate it via proof of concept using network function virtualization as a service. For this thesis, we finally apply lean principles for the defined service relationship model to reduce waste and investigate how lean benefits the model to be proven as performance service oriented. Methods. The essence of this work is to make a business organization lean by investigating its actions and applying lean principles. To elaborate, this thesis work involves in a research of papers from IEEE, TMF, IETF and Ericsson. It results in modelling of a PoC by following requirement analysis methodology and by applying lean principles to eliminate unnecessary processes which doesn’t add any value. Results. The results of the work include a full-fledged service relationship model that include three service levels with roles that can fit in to requirement specifications of NFV infrastructure. The results also show the service levels functionalities and their relationships between the roles. It has also been observed that the services that are needed to be standardized are defined with syntax for ways to describe network functions. It is observed that lean principles benefit the service relationship model from reducing waste factors and hereby providing a PoC which is performance service oriented. Conclusions. We conclude that roles defined are fit for the service relationship model designed. Moreover, we conclude that the model can hence contain the flow of service by standardizing the subservices and reducing waste interpreted with lean principles and there is a need for further use case proof of the model in full scale industry trials. It also concludes the ways to describe network functions syntax which follows lean principles that are essential to have them for the sub-services standardization. However, PoC defined can be an assurance to the NFV infrastructure.
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Adapa, Sasank Sai Sujan. "APPLYING LEAN PRINCIPLES FOR PERFORMANCE ORIENTED SERVICE DESIGN OF VIRTUAL NETWORK FUNCTIONS FOR NFV INFRASTRUCTURE : Concepts of Lean." Thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13358.

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Context. Network Function Virtualization was recently proposed by European Telecommunications Standards Institute (ETSI) to improve the network service flexibility by virtualization of network services and applications that run on hardware. To virtualize network functions, the software is decoupled from underlying physical hardware. NFV aims to transform industries by reducing capital investments on hardware by using commercial-of-the-shelf (COTS) hardware. NFV makes rapid innovative growth in telecom services through software based service deployment. Objectives. This thesis work aims to investigate how business organizations function and the roles in defining a service relationship model. The work also aims to define a service relationship model and to validate it via proof of concept using network function virtualization as a service. For this thesis, we finally apply lean principles for the defined service relationship model to reduce waste and investigate how lean benefits the model to be proven as performance service oriented. Methods. The essence of this work is to make a business organization lean by investigating its actions and applying lean principles. To elaborate, this thesis work involves in a research of papers from IEEE, TMF, IETF and Ericsson. It results in modelling of a PoC by following requirement analysis methodology and by applying lean principles to eliminate unnecessary processes which doesn’t add any value. Results. The results of the work include a full-fledged service relationship model that include three service levels with roles that can fit in to requirement specifications of NFV infrastructure. The results also show the service levels functionalities and their relationships between the roles. It has also been observed that the services that are needed to be standardized are defined with syntax for ways to describe network functions. It is observed that lean principles benefit the service relationship model from reducing waste factors and hereby providing a PoC which is performance service oriented. Conclusions. We conclude that roles defined are fit for the service relationship model designed. Moreover, we conclude that the model can hence contain the flow of service by standardizing the subservices and reducing waste interpreted with lean principles and there is a need for further use case proof of the model in full scale industry trials. It also concludes the ways to describe network functions syntax which follows lean principles that are essential to have them for the sub-services standardization. However, PoC defined can be an assurance to the NFV infrastructure.
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Houidi, Omar. "Algorithms for Virtual Network Functions chaining." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAS005.

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Cette thèse traite du placement optimal et heuristique de fonctions réseau et de chaînes de fonction réseau dans des infrastructures cloud et réseau virtualisées. L'émergence de la virtualisation des fonctions réseau, connu sous l'acronyme NFV pour Network Function Virtualization, permet de découpler les fonctions réseau en mode logiciel du matériel d'hébergement et de s'appuyer sur des serveurs génériques et d'éviter l'usage de, et la dépendance à, des matériels dédiés voire propriétaires.Le placement de fonctions réseau virtualisées (représentées par VNF, Virtualized Network Functions) est NP-Difficile puisqu'il s'agit de projeter un petit graphe de ressources virtuelles sur un graphe plus grand (graphe de l'infrastructure d'hébergement). Les solutions optimales, en particulier la programmation linéaire en nombre entier (ILP), ne passent pas à l'échelle. Sachant que la demande est dynamique et peut varier dans le temps et que le réseau est lui même variable dans le temps, il est important de prévoir des adaptations des placements. Cela peut s'effectuer par de l'élasticité sur les ressources d'hébergement réservées à une fonction réseau virtualisée, à un graphe de service réseau et par une extension du graphe de service lui même en fonction du contexte et des exigences des utilisateurs ou tenants.La thèse propose une famille d'algorithmes pour le placement de chaînes de services (ou fonctions) réseau avec la possibilité d'étendre les ressources d'hébergement des VNFs (c'est à dire assurer l'élasticité du service d'hébergement en augmentant les ressources allouées ou en générant plusieurs instances de VNFs pour écouler le trafic et répondre à la demande) en plus du placement initial. Une solution en programmation en nombre entier est élaborée et aussi utilisée comme référence pour une comparaison avec l'état de l'art et avec les extensions proposées. L'optimisation étant effectuée en instantanée au fur à mesure de l'arrivée des demandes, une à la fois, une solution qui regroupe plusieurs demandes pour y répondre simultanément, en élaborant un graphe composite, permet d'améliorer les performances. Cette approche connue sous le nom de "batch" n'améliore que partiellement la performance, la récompense sur le long terme (en efficacité, minimisation des ressources consommées, et en équilibrage de charge) est nécessairement limitée.La thèse s'est penchée aussi sur l'extension de graphes de services réseau, de tenants, déjà déployés, en adoptant une approche de type arbre de recouvrement, Spanning Tree. Plus spécifiquement une modélisation du problème en un "Steiner Tree Problem" a conduit à des performances proches de l'optimal pour des extensions de graphes au fil des demandes, en les traitant séparément. Les travaux de thèse sont par la suite revenus sur la rentabilité sur le long terme des algorithmes, en approchant le placement de chaînes de services et fonctions réseau comme un objectif long terme via de l'apprentissage par renforcement en se souciant plus de la rentabilité et de l'efficacité long terme des algorithmes contrairement aux approches visant exclusivement l'optimalité instantanée à chaque nouvelle demande.Cette thèse a permis de faire avancer autant que faire se peut l'état de l'art du placement optimal dans les infrastructures cloud et réseau partagées. Notamment, le problème, et besoin, d'extension de graphes, de tenants, déjà déployés, sans perturber l'hébergement initial, a reçu peu d'attention. Pourtant ce besoin est essentiel pour répondre à des déploiements additionnels de nouvelles fonctions et services réseau, et pour réagir aux dégradations et à l'accroissement de la demande, aux attaques et pour assurer l'introduction de nouveaux services et fonctions de sécurité autour du graphe initial. L'approche peut aussi répondre à des modifications de graphes et d'isolations d'une partie (défectueuse ou compromise) d'un graphe et de son remplacement par d'autres services et graphes fiables et non altérés
Network Function Virtualization (NFV) is an innovative emerging concept that decouples network functions (such as firewalls, DNS, NATs, load balancers, etc.) from dedicated hardware devices (the traditional expensive middleboxes). This decoupling enables hosting of network services, known as Virtualized Network Functions (VNFs), on commodity hardware (such as switches or servers) and thus facilitates and accelerates service deployment and management by providers, improves flexibility, leads to efficient and scalable resource usage, and reduces costs. This paradigm is a major turning point in the evolution of networking, as it introduces high expectations for enhanced economical network services, as well as major technical challenges.One of the main technical challenges in this domain is the optimal placement of the VNFs within the hosting infrastructures. This placement has a critical impact on the performance of the network, as well as on its reliability and operation cost. The VNF Placement and Chaining Problem is NP-Hard and there is a need for placement approaches that can scale with problem size and find good solutions in acceptable times. The overarching goal of this thesis is to enable dynamic virtual network resources provisioning to deal with demand fluctuation during the virtual network lifetime, and to enhance the substrate resource usage. Reserving a fixed amount of resources is inefficient to satisfy the VNF resource requirements. To cope with these problems, we propose dynamic resource management strategies.In this thesis, both exact and heuristic algorithms are designed and evaluated in terms of optimality, complexity, ability to scale, and compared with the state of the art. Elastic mechanisms and scaling algorithms are first presented to improve adaptation and deployment of virtualized network functions in NFV infrastructures to support increasing demand while increasing provider's revenue. Since network providers not only need to control, classify and steer user and application traffic flows in their dedicated slices but also want to extend their already acquired and operational virtual networks or slices with additional service graphs, the thesis proposes extension algorithms of already hosted network functions graphs without disrupting initially deployed and active service instances. The proposed algorithms extend already deployed network services and functions graphs to respond to new demands while taking into account the constraint of minimizing the impact on the original service graphs. The extension algorithms are particularly useful and suitable for situations where already deployed graphs need to be enhanced with new features and properties (adding new functions) and modified to react to degradation and attacks such as removing a fraction of the graph and replacing with new complex and composed functions into more capable and uncompromised graphs.The thesis also addresses the VNF placement and chaining problem in an online and in a batch mode to improve performance in terms of longer time reward. An enhanced Reinforcement Learning-based approach is also proposed to improve the long term reward beyond what the previous methods can achieve. This is analyzed and realized for a load balancing objective but can be adjusted for other criteria
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Rankothge, Windhya. "Towards virtualized network functions as a service." Doctoral thesis, Universitat Pompeu Fabra, 2017. http://hdl.handle.net/10803/402892.

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Network Function Virtualization (NFV) is a promising technology that proposes to move packet processing from dedicated hardware middle-boxes to software running on commodity servers. As such, NFV brings the possibility of outsourcing enterprise Network Function (NFs) processing to the cloud. However, for a Cloud Service Provider (CSP) to offer such services, several research problems still need to be addressed. When an enterprise outsources its NFs to a CSP, the CSP is responsible for deciding: (1) where initial Virtual NFs (VNFs) should be instantiated, and (2) what, when and where additional VNFs should be instantiated to satisfy the traffic changes (scaling), (3) how to update the network configurations with minimum impact on network performances, etc. This brings the requirement of a cloud management framework for VNFs and the cloud infrastructure related operations: provisioning, configuring, maintaining and scaling of the VNFs, as well as configuring and updating of the cloud network. In this thesis we explore three aspects of a cloud management framework for VNF: (1) dynamic resource allocation, (2) VNFs scaling methods and (3) dynamic load balancing. In the context of dynamic resource allocation for VNFs, we explore two resource allocation algorithms for: (1) the initial placement of VNFs, and (2) the scaling of VNFs to support traffic changes. We propose two approximation approaches (heuristic based): (1) Iterated Local Search (ILS) and (2) Genetic Programming (GP) to implement the resource allocation algorithms. We compare these heuristic based approaches with a traditional resource allocation approach: Integer Linear Programming (ILP). In the context of VNFs scaling methods, we explored three different scaling approaches: (1) vertical scaling, (2) migration and (3) horizontal. We analyse the three scaling methods in-terms of their practical implementation aspects as well as the optimization aspects with respect to the management. In the context of dynamic load balancing, we explore load balancing approaches that maintain affinity and handle states and sessions of the traffic, so that the requirement of state migration is avoided. We propose a session-aware load balancing algorithm based on consistent hashing.
La virtualización de funciones de redes (NFV) es una tecnología prometedora que propone mover el procesamiento de paquetes de cajas intermedias de hardware dedicadas al procesamiento especializado de paquetes a módulos de software que se ejecuta en servidores no especializados. Como tal, NFV crea la posibilidad de externalizar de las redes empresariales el procesamiento hecho por funciones de redes (NFs) a la nube. Sin embargo, para que un Proveedor de Servicios en la Nube (CSP) ofrezca tales servicios, todavía hay que resolver varios problemas. Cuando una empresa subcontrata sus NF a un CSP, el CSP es responsable de decidir: (1) dónde deben instanciarse las NF virtuales iniciales (VNF), y (2) qué tipo, cuándo y dónde deben instanciarse VNF adicionales para satisfacer los cambios de tráfico (Escalamiento), (3) cómo actualizar las configuraciones de la red con el mínimo impacto en los rendimientos de la misma, etc. Esto requiere de un marco de gestión de la nube para VNFs y las operaciones relacionadas con la infraestructura de nube: provisiona miento, mantenimiento y escalado de les VNS. Así como la configuración y actualización de la red en la nube. En esta tesis exploramos tres aspectos de un marco de gestión de la nube para VNF: (1) asignación dinámica de recursos, (2) métodos de escalado para VNFs y (3) balanceo de carga dinámico. En el contexto de la asignación dinámica de recursos para VNFs, exploramos dos algoritmos de asignación de recursos para: (1) la ubicación inicial de VNFs, y (2) la escala de VNFs para apoyar los cambios de tráfico. Proponemos dos métodos de aproximación (basadas en heurísticas): (1) Búsqueda Local Iterada (ILS) y (2) Programación Genética (GP) para implementar los algoritmos de asignación de recursos. Comparamos estos enfoques heurísticos con en un enfoque tradicional de asignación de recursos: Programación Lineal Entera (ILP). En el contexto de los métodos de escalde VNFs, hemos explorado tres enfoques de escala diferentes: (1) escalamiento vertical, (2) la migración y (3) horizontal. Analizamos los tres métodos de escalado en términos de sus aspectos de implementación práctica, así como los aspectos de optimización con respecto a la gestión. En el contexto del balanceo de carga dinámico, exploramos enfoques de equilibrio de carga que mantienen la afinidad y manejan estados y sesiones del tráfico, de manera que se evita el la necesidad de migración del estado. Proponemos un algoritmo de equilibrio de carga que considera sesiones basado en funciones de hash consistente.
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Zhao, Yimeng. "Déploiement du switch logiciel dans SDN-enabled Réseau environnement de virtualisation." Electronic Thesis or Diss., Paris, ENST, 2016. http://www.theses.fr/2016ENST0029.

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Avec la prévalence de logicielisation, virtualisation est devenue une technologie dominante dans des data-centres et clouds. Deux aspects principaux de la logicielisation de réseaux sont Software Defined Network (SDN) et Network Function Virtualization (NFV), dont un des outils essentiel sont les switches logiciels, à l’opposition des switches matériaux. Les switches logiciels sont également indispensables pour le succès de NFV. Cette thèse vise à relever des défis principaux dans la logicielisation de réseaux. Spécifiquement, elle porte sur le déploiement des switches logiciels dans un réseau virtuel avec SDN
Due to the growing trend of “Softwarization”, virtualization is becoming the dominating technology in data center and cloud environment. Software Defined Network (SDN) and Network Function Virtualization (NFV) are different expressions of “Network Softwarization”. Software switch is exactly the suitable and powerful tool to support network softwarization, which is also indispensable to the success of network virtualization. Regarding the challenges and opportunities in network softwarization, this thesis aims to investigate the deployment of software switch in a SDN-enabled network virtualization environment
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9

Franco, Muriel Figueredo. "Interactive visualizations for management of NFV-enabled networks." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/158202.

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A Virtualização de Funções de Rede (Network Functions Virtualization - NFV) está mudando o paradigma das redes de telecomunicações. Esta nova tecnologia permite diversas oportunidades de inovações e possibilita o desenvolvimento de novos modelos de negócio. Em relação às redes NFV, os provedores de serviços têm a oportunidade de criar modelos de negócio que permitam aos clientes contratarem Funções de Rede Virtualizadas (Virtual Network Functions - VNFs) que proveem diferentes serviços de rede (e.g., Firewall, NAT e transcoders). Porém, nestes modelos, a quantidade de informações a serem gerenciadas cresce rapidamente. Baseado nisso, os operadores de rede devem ser capazes de entender e manipular uma grande quantidade de informação para gerenciar, de forma efetiva, as redes NFV. Para enfrentar esse problema, introduzimos uma plataforma de visualização denominada VISION, a qual tem como principal objetivo ajudar os operadores de rede na identificação da causa raiz de problemas em NFV. Para isso, propusemos: (i) uma abordagem para coleta e organização de dados do ambiente NFV gerenciado; (ii) cinco diferentes visualizações que auxiliam nas tarefas de gerenciamento de NFV como, por exemplo, no processo de identificação de problemas em VNFs e no planejamento de negócios e (iii) um modelo baseado em templates que suporta o desenvolvimento e o reuso de visualizações. Para fins de avaliação desta dissertação, foi desenvolvido um protótipo da plataforma VISION e de todas as visualizações propostas. Após, conduzimos um conjunto de casos de estudo para prover evidências sobre a viabilidade e utilidade de nossas visualizações. Os diferentes casos analisados, abordam por exemplo, a identificação de problemas na alocação de VNFs que estão impactando no desempenho do serviço oferecido e também na investigação de prioridades de investimento para suprir as demandas dos clientes da rede. Por fim, apresentamos uma avaliação de usabilidade realizada juntamente a especialistas em redes de computadores para avaliar os recursos e benefícios da plataforma VISION. Os resultados obtidos demonstram que nossas visualizações possibilitam ao operador de rede um rápido e fácil acesso às informações importantes para o gerenciamento de redes NFV, assim facilitando a obtenção de insights para a identificação de problemas complexos no contexto de redes NFV. Além disso, os resultados demonstram uma avaliação positiva por especialistas sobre os aspectos gerais de usabilidade do protótipo desenvolvido.
Network Functions Virtualization (NFV) is driving a paradigm shift in telecommunications networks and computer networks, by fostering new business models and creating innovation opportunities. In NFV-enabled networks, service providers have the opportunity to build a business model where tenants can purchase Virtual Network Functions (VNFs) that provide distinct network services and functions (e.g., Firewall, NAT, and transcoders). However, the amount of managed data grows in a fast pace. The network operator must understand and manipulate many data to effectively manage the network. To tackle this problem, we introduce VISION, a platform based on visualizations techniques to help network operators to determine the cause of not obvious problems. For this, we provide: (i) an approach to collect and organize data from the NFV environments; (ii) five distinct visualizations that can aid in NFV management tasks, such as in the process of identifying VNFs problems and planning of NFV-enabled businesses; and (iii) a template model that supports new visualization applications. To evaluate our work, we implemented a prototype of VISION platform and each of the proposed visualizations. We then conducted distinct case studies to provide evidence of the feasibility of our visualizations. These case studies cover different scenarios, such as the identification of misplacement of VNFs that are generating bottlenecks in a forwarding graph and the investigation of investment priorities to supply tenants demands. Finally, we present a usability evaluation with network operators to indicate the benefits of the VISION platform. The results obtained show that our visualizations allow the operator to access relevant information and have insights to identify not obvious problems in the context of NFV-enabled networks. In addition, we received positive feedback about general usability aspects related to our prototype.
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Luizelli, Marcelo Caggiani. "Scalable cost-efficient placement and chaining of virtual network functions." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/169337.

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A Virtualização de Funções de Rede (NFV – Network Function Virtualization) é um novo conceito arquitetural que está remodelando a operação de funções de rede (e.g., firewall, gateways e proxies). O conceito principal de NFV consiste em desacoplar a lógica de funções de rede dos dispositivos de hardware especializados e, desta forma, permite a execução de imagens de software sobre hardware de prateleira (COTS – Commercial Off-The-Shelf). NFV tem o potencial para tornar a operação das funções de rede mais flexíveis e econômicas, primordiais em ambientes onde o número de funções implantadas pode chegar facilmente à ordem de centenas. Apesar da intensa atividade de pesquisa na área, o problema de posicionar e encadear funções de rede virtuais (VNF – Virtual Network Functions) de maneira escalável e com baixo custo ainda apresenta uma série de limitações. Mais especificamente, as estratégias existentes na literatura negligenciam o aspecto de encadeamento de VNFs (i.e., objetivam sobretudo o posicionamento), não escalam para o tamanho das infraestruturas NFV (i.e., milhares de nós com capacidade de computação) e, por último, baseiam a qualidade das soluções obtidas em custos operacionais não representativos. Nesta tese, aborda-se o posicionamento e o encadeamento de funções de rede virtualizadas (VNFPC – Virtual Network Function Placement and Chaining) como um problema de otimização no contexto intra- e inter-datacenter. Primeiro, formaliza-se o problema VNFPC e propõe-se um modelo de Programação Linear Inteira (ILP) para resolvêlo. O objetivo consiste em minimizar a alocação de recursos, ao mesmo tempo que atende aos requisitos e restrições de fluxo de rede. Segundo, aborda-se a escalabilidade do problema VNFPC para resolver grandes instâncias do problema (i.e., milhares de nós NFV). Propõe-se um um algoritmo heurístico baseado em fix-and-optimize que incorpora a meta-heurística Variable Neighborhood Search (VNS) para explorar eficientemente o espaço de solução do problema VNFPC. Terceiro, avalia-se as limitações de desempenho e os custos operacionais de estratégias típicas de aprovisionamento ambientes reais de NFV. Com base nos resultados empíricos coletados, propõe-se um modelo analítico que estima com alta precisão os custos operacionais para requisitos de VNFs arbitrários. Quarto, desenvolve-se um mecanismo para a implantação de encadeamentos de VNFs no contexto intra-datacenter. O algoritmo proposto (OCM – Operational Cost Minimization) baseia-se em uma extensão da redução bem conhecida do problema de emparelhamento ponderado (i.e., weighted perfect matching problem) para o problema de fluxo de custo mínimo (i.e., min-cost flow problem) e considera o desempenho das VNFs (e.g., requisitos de CPU), bem como os custos operacionais estimados. Os resultados alcaçados mostram que o modelo ILP proposto para o problema VNFPC reduz em até 25% nos atrasos fim-a-fim (em comparação com os encadeamentos observados nas infra-estruturas tradicionais) com um excesso de provisionamento de recursos aceitável – limitado a 4%. Além disso, os resultados evidenciam que a heurística proposta (baseada em fix-and-optimize) é capaz de encontrar soluções factíveis de alta qualidade de forma eficiente, mesmo em cenários com milhares de VNFs. Além disso, provê-se um melhor entendimento sobre as métricas de desempenho de rede (e.g., vazão, consumo de CPU e capacidade de processamento de pacotes) para as estratégias típicas de implantação de VNFs adotadas infraestruturas NFV. Por último, o algoritmo proposto no contexto intra-datacenter (i.e. OCM) reduz significativamente os custos operacionais quando comparado aos mecanismos de posicionamento típicos uti
Network Function Virtualization (NFV) is a novel concept that is reshaping the middlebox arena, shifting network functions (e.g. firewall, gateways, proxies) from specialized hardware appliances to software images running on commodity hardware. This concept has potential to make network function provision and operation more flexible and cost-effective, paramount in a world where deployed middleboxes may easily reach the order of hundreds. Despite recent research activity in the field, little has been done towards scalable and cost-efficient placement & chaining of virtual network functions (VNFs) – a key feature for the effective success of NFV. More specifically, existing strategies have neglected the chaining aspect of NFV (focusing on efficient placement only), failed to scale to hundreds of network functions and relied on unrealistic operational costs. In this thesis, we approach VNF placement and chaining as an optimization problem in the context of Inter- and Intra-datacenter. First, we formalize the Virtual Network Function Placement and Chaining (VNFPC) problem and propose an Integer Linear Programming (ILP) model to solve it. The goal is to minimize required resource allocation, while meeting network flow requirements and constraints. Then, we address scalability of VNFPC problem to solve large instances (i.e., thousands of NFV nodes) by proposing a fixand- optimize-based heuristic algorithm for tackling it. Our algorithm incorporates a Variable Neighborhood Search (VNS) meta-heuristic, for efficiently exploring the placement and chaining solution space. Further, we assess the performance limitations of typical NFV-based deployments and the incurred operational costs of commodity servers and propose an analytical model that accurately predict the operational costs for arbitrary service chain requirements. Then, we develop a general service chain intra-datacenter deployment mechanism (named OCM – Operational Cost Minimization) that considers both the actual performance of the service chains (e.g., CPU requirements) as well as the operational incurred cost. Our novel algorithm is based on an extension of the well-known reduction from weighted matching to min-cost flow problem. Finally, we tackle the problem of monitoring service chains in NFV-based environments. For that, we introduce the DNM (Distributed Network Monitoring) problem and propose an optimization model to solve it. DNM allows service chain segments to be independently monitored, which allows specialized network monitoring requirements to be met in a efficient and coordinated way. Results show that the proposed ILP model for the VNFPC problem leads to a reduction of up to 25% in end-to-end delays (in comparison to chainings observed in traditional infrastructures) and an acceptable resource over-provisioning limited to 4%. Also, we provide strong evidences that our fix-and-optimize based heuristic is able to find feasible, high-quality solutions efficiently, even in scenarios scaling to thousands of VNFs. Further, we provide indepth insights on network performance metrics (such as throughput, CPU utilization and packet processing) and its current limitations while considering typical deployment strategies. Our OCM algorithm reduces significantly operational costs when compared to the de-facto standard placement mechanisms used in Cloud systems. Last, our DNM model allows finer grained network monitoring with limited overheads. By coordinating the placement of monitoring sinks and the forwarding of network monitoring traffic, DNM can reduce the number of monitoring sinks and the network resource consumption (54% lower than a traditional method).
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Books on the topic "Network functions virtualization"

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Zhang, Ying. Network Function Virtualization: Concepts and Applicability in 5G Networks. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119390633.

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Yang, Song, Nan He, Fan Li, and Xiaoming Fu. Resource Allocation in Network Function Virtualization. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-4815-2.

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Blokdyk, Gerardus. Network Functions Virtualization: Third Edition. CreateSpace Independent Publishing Platform, 2018.

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Security in Network Functions Virtualization. Elsevier, 2017. http://dx.doi.org/10.1016/c2016-0-01121-x.

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Zhang, Zonghua, and Ahmed Meddahi. Security in Network Functions Virtualization. Elsevier, 2017.

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Zhang, Zonghua, and Ahmed Meddahi. Security in Network Functions Virtualization. Elsevier, 2017.

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Shah, Paresh, Rajendra Chayapathi, and Syed F. Hassan. Network Functions Virtualization with a Touch of SDN. Addison-Wesley Professional, 2016.

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Shah, Paresh, Rajendra Chayapathi, and Syed Hassan. Network Functions Virtualization (NFV) with a Touch of SDN. Pearson Education, Limited, 2016.

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Shah, Paresh, Rajendra Chayapathi, and Syed Hassan. Network Functions Virtualization (NFV) with a Touch of SDN. Pearson Education, Limited, 2016.

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Dumka, Ankur. Innovations in Software-Defined Networking and Network Functions Virtualization. IGI Global, 2018.

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Book chapters on the topic "Network functions virtualization"

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Medamana, John, and Tom Siracusa. "Network Functions Virtualization." In Building the Network of the Future, 25–48. Boca Raton : Taylor & Francis, CRC Press, 2017.: Chapman and Hall/CRC, 2017. http://dx.doi.org/10.1201/9781315208787-3.

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Stiegler, Greg, and John DeCastra. "Network Functions Virtualization Infrastructure." In Building the Network of the Future, 49–66. Boca Raton : Taylor & Francis, CRC Press, 2017.: Chapman and Hall/CRC, 2017. http://dx.doi.org/10.1201/9781315208787-4.

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Ocampo, Andrés F., Juliver Gil-Herrera, Pedro H. Isolani, Miguel C. Neves, Juan F. Botero, Steven Latré, Lisandro Zambenedetti, Marinho P. Barcellos, and Luciano P. Gaspary. "Optimal Service Function Chain Composition in Network Functions Virtualization." In Lecture Notes in Computer Science, 62–76. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60774-0_5.

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Smine, Manel, David Espes, Nora Cuppens-Boulahia, and Frédéric Cuppens. "Network Functions Virtualization Access Control as a Service." In Data and Applications Security and Privacy XXXIV, 100–117. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49669-2_6.

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Banafa, Ahmed. "Network Functions Virtualization (NFV) or Software-Defined Networking (SDN)?" In Quantum Computing and Other Transformative Technologies, 97–100. New York: River Publishers, 2023. http://dx.doi.org/10.1201/9781003339175-24.

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Alhebaishi, Nawaf, Lingyu Wang, and Sushil Jajodia. "Modeling and Mitigating Security Threats in Network Functions Virtualization (NFV)." In Data and Applications Security and Privacy XXXIV, 3–23. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49669-2_1.

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Ruseva, Stela, Rumyana Antonova, and Nikola Naidenov. "Open Platform for Network Functions Virtualization in the Digital Era." In Smart Technologies and Innovation for a Sustainable Future, 279–85. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-01659-3_32.

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Suksomboon, Kalika. "Performance Modeling of Virtual Packet Forwarding Functions for Wireless Network Virtualization." In Encyclopedia of Wireless Networks, 1065–71. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-78262-1_210.

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Suksomboon, Kalika. "Performance Modeling of Virtual Packet Forwarding Functions for Wireless Network Virtualization." In Encyclopedia of Wireless Networks, 1–7. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-32903-1_210-1.

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Ali, Syed Riffat. "Network Function Virtualization." In Signals and Communication Technology, 131–56. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01647-0_5.

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Conference papers on the topic "Network functions virtualization"

1

Castillo-Lema, José, Augusto José Venâncio Neto, Flavio de Oliveira Silva, and Sergio Takeo Kofuji. "Network Function Virtualization in Content-Centric Networks." In X Workshop de Pesquisa Experimental da Internet do Futuro. Sociedade Brasileira de Computação - SBC, 2019. http://dx.doi.org/10.5753/wpeif.2019.7696.

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Network Functions Virtualization (NFV) offers an alternative way to design, deploy, and manage networking functions and services by leveraging virtualization technologies to consolidate network functions into general-purpose hardware platforms. On the past years extensive effort has been made to evolve and mature NFV tecnologies over IP networks. However, little or no attempts at all have been made to incorporate NFV into Information-Centric Networks (ICN). This work explores the use and implementation of virtual Network Funtions (VNFS)in Content-Centric Networks (CCN), and proposes the use of the Named Function Networking (NFN) paradigm as means to implement network functions and services in this kind of networks, distributing the network functions and services through the networks nodes and providing flexibility to dynamically place functions in the network as required and without the need of a central controller.
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Raza, Muhammad Taqi, Dongho Kim, Kyu-Han Kim, Songwu Lu, and Mario Gerla. "Rethinking LTE network functions virtualization." In 2017 IEEE 25th International Conference on Network Protocols (ICNP). IEEE, 2017. http://dx.doi.org/10.1109/icnp.2017.8117554.

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Fernandez, Eduardo B., and Brahim Hamid. "A pattern for network functions virtualization." In EuroPLoP 2015: 20th European Conference on Pattern Languages of Programs. New York, NY, USA: ACM, 2015. http://dx.doi.org/10.1145/2855321.2855369.

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Repetto, M., A. Carrega, and G. Lamanna. "Towards Novel Security Architectures for Network Functions Virtualization." In 2019 IEEE Conference on Network Function Virtualization and Software Defined Networks (NFV-SDN). IEEE, 2019. http://dx.doi.org/10.1109/nfv-sdn47374.2019.9040068.

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Pham, Tuan-Minh, Thi-Thuy-Lien Nguyen, Serge Fdida, and Huynh Thi Thanh Binh. "Online load balancing for Network Functions Virtualization." In 2017 IEEE International Conference on Communications (ICC). IEEE, 2017. http://dx.doi.org/10.1109/icc.2017.7996511.

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Nguyen, Thi-Thuy-Lien, Tuan-Minh Pham, and Huynh Thi Thanh Binh. "Adaptive multipath routing for network functions virtualization." In SoICT '16: Seventh International Symposium on Information and Communication Technology. New York, NY, USA: ACM, 2016. http://dx.doi.org/10.1145/3011077.3011123.

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Kolias, Christos. "Network Functions Virtualization: Challenges, Vision and Action." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/ofc.2013.om3e.4.

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Park, Younghee, Pritesh Chandaliya, Akshaya Muralidharan, Nikash Kumar, and Hongxin Hu. "Dynamic Defense Provision via Network Functions Virtualization." In CODASPY '17: Seventh ACM Conference on Data and Application Security and Privacy. New York, NY, USA: ACM, 2017. http://dx.doi.org/10.1145/3040992.3041005.

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Makaya, Christian, and Douglas Freimuth. "Automated virtual network functions onboarding." In 2016 IEEE Conference on Network Function Virtualization and Software-Defined Networks (NFV-SDN). IEEE, 2016. http://dx.doi.org/10.1109/nfv-sdn.2016.7919499.

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Moradi, Farnaz, Bertrand Pechenot, and Jonas Martensson. "Monitoring Transport and Cloud for Network Functions Virtualization." In 2015 European Workshop on Software Defined Networks (EWSDN). IEEE, 2015. http://dx.doi.org/10.1109/ewsdn.2015.75.

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