Academic literature on the topic 'Quality of Service in SDN'

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Journal articles on the topic "Quality of Service in SDN"

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Dewi, Nuning Nurna. "EFFECT OF SERVICE QUALITY MANAGEMENT ON STUDENT SATISFACTION." JURNAL TERAPAN MANAJEMEN DAN BISNIS 7, no. 1 (March 29, 2021): 1. http://dx.doi.org/10.26737/jtmb.v7i1.2336.

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<p>This study aims to determine whether empathic services, facility services, reliable services, responsive services and convincing services have an effect on student satisfaction. The research method used is to take a sample from a population and use a questionnaire as the main data collection. To dig up information / data and distribute it to answer the formulation of the problem that has been determined so that this research is an exploratory descriptive. As the population in this study were all students of SDN Guluk-guluk I Kec. Guluk-guluk in the academic year 2010/2011 as many as 335 students. For the purposes of analysis in this study, primary data are needed as the main data and secondary data as complementary data. The method of obtaining primary data as the main data will be used by using a questionnaire technique or by using a questionnaire. To obtain more complete data information in this study, observation and documentation techniques were also used. So that the data collection techniques in this study used questionnaires, documentation and observation. Reliable services, responsive services, convincing services, empathic services, and service provider facilities have a significant effect on Student Satisfaction at SDN Guluk-guluk I Kec. Guluk - guluk , this is indicated by using the F test shows the value of F count of 143.161 (significance f = 0.000) so Fcount&gt; Ftable (143.161&gt; 3.095) or Sig F &lt;5% (0.000 &lt;0.05) means the magnitude of the influence of quality variables service (X1) to student satisfaction (Y) of 90.00%. Partially Service Quality Management has a significant positive effect on Student Satisfaction at SDN Guluk-guluk I Kec. Gulul-guluk, this is indicated by the t count value of 5.221 with a significance of 0.000, because tcount&gt; ttable (5.221&gt; 1.986 ) or sig t &lt;5% (0.000 &lt;5%) and the value of the partial regression coefficient (standardized beta coefficients) is 0.595 then partially the service quality variable (X2) has a significant positive effect on the student satisfaction variable at SDN Guluk-guluk I Kec. Roll up (Y) Reliable service, responsive service, convincing service, empathic service, and service provision of facilities together have an effect on student satisfaction. Service quality management which more dominantly affects student satisfaction than other variables, this can be seen from the value of the regression coefficient (standardized coefficients beta) which is the largest compared to the coefficient value on the facility provision variable of 0.595 which shows the regression value of the service quality variable (X1) of 0.296.</p>
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BIN ZAKI, NUR EMRAN. "IMPACT OF SERVICE QUALITY OF LAND TRANSPORTATION ON CUSTOMER SATISFACTION AT JOHOR PORT LOGISTICS." Journal of Public Value and Administration Insights 1, no. 1 (November 13, 2018): 7–13. http://dx.doi.org/10.31580/jpvai.v1i1.137.

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This study is for the impact of service quality of land transportation on customer satisfaction at Johor Port Logistics. JP Logistics is the one-stop center for all logistics needs. It’s become a service provider. JP Logistics have the facilities to fulfill the customer requirements. The objective of this research is to identify the most influence of service on customer satisfaction on land transportation services at Johor Port Logistics Sdn Bhd and to categorized the strongest factor that customer needs from that service can be implemented o in this research The respondent of this study is the customer of JP Logistics Sdn Bhd. The population of this study is based on a demographic basis such as gender, age, marital status, education, and others. These studies just focus on customers in the Pasir Gudang area. In this study, researcher uses SPSS as the software to calculate the Normality Test, Frequencies Analysis and Correlation. Lastly, researchers also identify some recommendation in order to improve and full fill customer satisfaction in JP Logistics Sdn Bhd.
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Rozaq, Abdur, and I. Made Suartana. "Manajemen Quality of Service pada Jaringan Software Defined Network Menggunakan Opendaylight Controller." Journal of Informatics and Computer Science (JINACS) 3, no. 02 (August 23, 2021): 89–94. http://dx.doi.org/10.26740/jinacs.v3n02.p89-94.

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Kamajuan teknologi jaringan berkembang sangat pesat. Hal ini mengakibatkan tingkat konfigurasi pada jaringan semakin rumit, sehingga jaringan menjadi tidak fleksibel dan susah diatur. Software Defined Network (SDN) merupakan jaringan yang cukup fleksibel dan dapat dengan mudah untuk diatur. Jaringan SDN ini dapat mengatur dan mengelola sampai ribuan perangkat jaringan melalui pusat manajemen, pengoptimalan pada komponen jaringan meliputi pengoptimalan bandwidth, load balancing, traffic engineering yang bersangkutan dengan programmability dan scalability. Quality of Service (QoS) adalah suatu kemampuan dalam menyediakan layanan lalu lintas jaringan yang berbeda dengan kelas yang berbeda pula untuk menyediakan sebuah layanan jaringan agar menjadi lebih baik dan dapat terencana dengan jitter dan bandwidth yang khusus, serta kemampuan untuk kehilangan sebuah latensi yang dapat terkontrol. Dalam beberapa penelitian menunjukkan bahwa sistem yang telah dibangun dapat berhasil menjalankan manajemen QoS secara baik pada jaringan dan kualitas jaringan dapat meningkat. Tujuan dari penelitian ini adalah untuk melakukan perbandingan dari jaringan SDN yang menggunakan QoS dengan jaringan SDN yang tidak menggunakan QoS menggunakan controller Opendaylight. Dari hasil pengujian yang telah dilakukan kinerja dari jaringan SDN yang menggunakan QoS lebih baik dibandingkan jaringan SDN yang tidak menggunakan QoS baik dalam pengujian yang menggunakan background traffic maupun tidak.
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Merayo, Noemí, David de Pintos, Juan C. Aguado, Ignacio de Miguel, Ramón J. Durán, Patricia Fernández, Rubén M. Lorenzo, and Evaristo J. Abril. "An Experimental OpenFlow Proposal over Legacy GPONs to Allow Real-Time Service Reconfiguration Policies." Applied Sciences 11, no. 3 (January 20, 2021): 903. http://dx.doi.org/10.3390/app11030903.

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The integration of Software Defined Networking (SDN) technologies in Passive Optical Networks (PONs) would provide great advantages to Internet Service Providers (ISPs) and Network Operators, since they can optimize the network operation and reduce its complexity. However, some tasks regarding online service and network configuration strategies are difficult to move to external SDN-controllers since they are time-critical operations. However, the control of some of these policies by SDN techniques could lead to better network and management configuration in a centralized and automatic way. As a consequence, we propose and experimentally test the integration of an OpenFlow approach over legacy Gigabit Passive Optical Networks (GPONs), which allows moving some global service configuration policies to an external SDN controller implementing an SDN management layer that adjust these strategies according to dynamic Quality of Service (QoS) requirements of services in residential users. The viability and efficiency of our approach are demonstrated using a GPON testbed and proposing a new business scenario for ISPs and Network Operators.
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Selyukov, A., Y. Khmelnitsky, D. Kovpa, and O. Lisovskiy. "ANALYSIS OF MODELS AND PROGNOSTICATION OF RISKS OF FUNCTIONING OF CONTROL SYSTEM OF SDN OF ARCHITECTURE." Collection of scientific works of the Military Institute of Kyiv National Taras Shevchenko University, no. 64 (2019): 113–23. http://dx.doi.org/10.17721/2519-481x/2019/64-11.

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The article deals with the analysis of models and algorithms of the system control SDN of architecture for providing of more quality work of network. Great diversity of most hardware implementation of the data devices SDN architecture leads to the fact that different switches may not support some features or support them with limited performance. In the process network, this can significantly affect the throughput of an individual data flow or whole network domains. Routing flow transfer is carried out by criterion of quality of service and the criterion of balanced loads of network resources the network. Improving the quality of service is subject to the classification of the flow that greatly restricts the ability of flow control. Most models of such networks do not take into account the characteristics of multi-service data flow, which leads to deterioration in the quality of service and increase the likelihood of blocking the channels of transmission network. The inability to implement differentiated management for individual data streams for individual clients and take them into account quality requirements, leads to low efficiency of channel routing, sub-optimal distribution of network load, the deterioration of the quality of service high-priority data streams. Tools control over the process of transmission of individual data flow do not exist, whereby the control system has the ability to determine service degradation for these data streams, and therefore will not be able to guarantee the necessary level of control. New models and algorithms of functioning of a software – managed network will allow for routing data streams of network, differentiating them according to the sensitivity to mixing of packet and connection drops. At created networks try to dissociate C-plane from the plane of transmission and put considerable efforts to overcoming of the nascent problems related to complications of migration from traditional networks to architecture of SDN. The aim of this article is realization of analysis of models and algorithms of functioning of control system of architecture of SDN for more reliable work of network. It gives possibility to the users to get services with necessary quality, by authenticity and will allow overcoming the nascent problems related to complications of migration from traditional networks to architecture of SDN.
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M, Divya. "Improving Quality of Service through SDN for Mobile Networks." International Journal for Research in Applied Science and Engineering Technology 6, no. 3 (March 31, 2018): 2299–307. http://dx.doi.org/10.22214/ijraset.2018.3366.

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Chiu, Kai-Cheng, Chien-Chang Liu, and Li-Der Chou. "Reinforcement Learning-Based Service-Oriented Dynamic Multipath Routing in SDN." Wireless Communications and Mobile Computing 2022 (January 31, 2022): 1–16. http://dx.doi.org/10.1155/2022/1330993.

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The increasing quality and various requirements of network services are guaranteed because of the advancement of the emerging network paradigm, software-defined networking (SDN), and benefits from the centralized and software-defined architecture. The SDN not only facilitates the configuration of the network policies for traffic engineering but also brings convenience for network state obtainment. The traffic of numerous services is transmitted within a network, whereas each service may demand different network metrics, such as low latency or low packet loss rate. Corresponding quality of service policies must be enforced to meet the requirements of different services, and the balance of link utilization is also indispensable. In this research, Reinforcement Discrete Learning-Based Service-Oriented Multipath Routing (RED-STAR) has been proposed to understand the policy of distributing an optimal path for each service. The RED-STAR takes the network state and service type as input values to dynamically select the path a service must be forwarded. Custom protocols are designed for network state obtainment, and a deep learning-based traffic classification model is also integrated to identify network services. With the differentiated reward scheme for every service type, the reinforcement learning model in RED-STAR gradually achieves high reward values in various scenarios. The experimental results show that RED-STAR can adopt the dynamic network environment, obtaining the highest average reward value of 1.8579 and the lowest average maximum bandwidth utilization of 0.3601 among all path distribution schemes in a real-case scenario.
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Lozano-Rizk, Jose Eleno, Raul Rivera-Rodriguez, Juan Iván Nieto-Hipólito, Salvador Villarreal-Reyes, Alejandro Galaviz-Mosqueda, and Mabel Vazquez-Briseno. "Quality of Service in Software Defined Networks for Scientific Applications: Opportunities and Challenges." Proceedings of the Institute for System Programming of the RAS 33, no. 1 (2021): 111–22. http://dx.doi.org/10.15514/ispras-2021-33(1)-8.

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Scientific applications require to process, analyze and transfer large volumes of data in the shortest possible time from distributed data sources. In order to improve their performance, it is necessary to provide them with specific QoS parameters. On the other hand, SDN is presented as a new paradigm of communications networks that facilitates the management of the communications infrastructure and consequently allows to dynamically incorporate QoS parameters to the applications running in this type of network. With both these paradigms in mind, we conducted this research to answer the following questions: Do scientific applications that are running in an SDN-Enabled distributed data centers improve their performance? Do they consider network QoS parameters for job scheduling? The methodology used was to consult articles in specialized databases containing the keywords SDN and for scientific applications: HPC and Big Data. Then, we analyzed the articles where these keywords intersect with some of the parameters related to QoS in communications networks. Also, we reviewed QoS proposals in SDN to identify the advances in this research area. The results of this paper are: i) QoS is an open issue to incorporate in scientific applications that are running in an SDN ii) we identified the challenges to join both these paradigms, and iii) we present a strategy to provide QoS to scientific applications that are being executed among SDN-Enabled distributed data centers.
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Paulson, Eberechukwu Numan, Kamaludin Mohamad Yusof, Muhammad Nadzir Bin Marsono, Umar Suleiman Dauda, and Fapohunda Kofoworola. "Quality of Service Evaluation of Software Defined Internet of Things Network." ELEKTRIKA- Journal of Electrical Engineering 20, no. 1 (April 30, 2021): 65–75. http://dx.doi.org/10.11113/elektrika.v20n1.223.

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With the exponential growth of the Internet of Things (IoT) devices connected to the internet, resource provisioning for such the heterogeneous network is a challenging task for the traditional network architecture. In this context, the Software-Defined Networking (SDN) introduces many opportunities and provides the potential to overcome challenges associated with traditional network architecture. This work presents a Software-Defined IoT (SDIoT) architecture. The main focus of this research is to design a control plane (CP) for the SDIoT. The scope of this work is limited to the introduction of an overlay SDN CP in the traditional IoT network architecture. The proposed architecture focuses on resource provisioning while ensuring the quality of service (QoS) satisfaction for the network. A comparative analysis between the traditional and the SDN network approach was done in terms of Jitter, Latency and Throughput. From the latency, delay and throughput performance results, the SDN-based IoT network improves network efficiency by reducing network overheads generated from frequent communication between the nodes and the controllers. Precisely, the average latency and average jitter percentile improvement from the traditional IoT network to the SDIoT for all the nodes is 574% and 600% respectively. Also, an overall throughput improvement is recorded for the SDIoT when compared to traditional IoT network for all the nodes.
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Rozhon, Jan, Filip Rezac, Jakub Jalowiczor, and Ladislav Behan. "Augmenting Speech Quality Estimation in Software-Defined Networking Using Machine Learning Algorithms." Sensors 21, no. 10 (May 17, 2021): 3477. http://dx.doi.org/10.3390/s21103477.

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With the increased number of Software-Defined Networking (SDN) installations, the data centers of large service providers are becoming more and more agile in terms of network performance efficiency and flexibility. While SDN is an active and obvious trend in a modern data center design, the implications and possibilities it carries for effective and efficient network management are not yet fully explored and utilized. With most of the modern Internet traffic consisting of multimedia services and media-rich content sharing, the quality of multimedia communications is at the center of attention of many companies and research groups. Since SDN-enabled switches have an inherent feature of monitoring the flow statistics in terms of packets and bytes transmitted/lost, these devices can be utilized to monitor the essential statistics of the multimedia communications, allowing the provider to act in case of network failing to deliver the required service quality. The internal packet processing in the SDN switch enables the SDN controller to fetch the statistical information of the particular packet flow using the PacketIn and Multipart messages. This information, if preprocessed properly, can be used to estimate higher layer interpretation of the link quality and thus allowing to relate the provided quality of service (QoS) to the quality of user experience (QoE). This article discusses the experimental setup that can be used to estimate the quality of speech communication based on the information provided by the SDN controller. To achieve higher accuracy of the result, latency characteristics are added based on the exploiting of the dummy packet injection into the packet stream and/or RTCP packet analysis. The results of the experiment show that this innovative approach calculates the statistics of each individual RTP stream, and thus, we obtain a method for dynamic measurement of speech quality, where when quality decreases, it is possible to respond quickly by changing routing at the network level for each individual call. To improve the quality of call measurements, a Convolutional Neural Network (CNN) was also implemented. This model is based on two standard approaches to measuring the speech quality: PESQ and E-model. However, unlike PESQ/POLQA, the CNN-based model can take delay into account, and unlike the E-model, the resulting accuracy is much higher.
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Dissertations / Theses on the topic "Quality of Service in SDN"

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Ongaro, Francesco. "Enhancing quality of service in software-defined networks." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7356/.

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Resource management is of paramount importance in network scenarios and it is a long-standing and still open issue. Unfortunately, while technology and innovation continue to evolve, our network infrastructure system has been maintained almost in the same shape for decades and this phenomenon is known as “Internet ossification”. Software-Defined Networking (SDN) is an emerging paradigm in computer networking that allows a logically centralized software program to control the behavior of an entire network. This is done by decoupling the network control logic from the underlying physical routers and switches that forward traffic to the selected destination. One mechanism that allows the control plane to communicate with the data plane is OpenFlow. The network operators could write high-level control programs that specify the behavior of an entire network. Moreover, the centralized control makes it possible to define more specific and complex tasks that could involve many network functionalities, e.g., security, resource management and control, into a single framework. Nowadays, the explosive growth of real time applications that require stringent Quality of Service (QoS) guarantees, brings the network programmers to design network protocols that deliver certain performance guarantees. This thesis exploits the use of SDN in conjunction with OpenFlow to manage differentiating network services with an high QoS. Initially, we define a QoS Management and Orchestration architecture that allows us to manage the network in a modular way. Then, we provide a seamless integration between the architecture and the standard SDN paradigm following the separation between the control and data planes. This work is a first step towards the deployment of our proposal in the University of California, Los Angeles (UCLA) campus network with differentiating services and stringent QoS requirements. We also plan to exploit our solution to manage the handoff between different network technologies, e.g., Wi-Fi and WiMAX. Indeed, the model can be run with different parameters, depending on the communication protocol and can provide optimal results to be implemented on the campus network.
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Morin, Cédric. "Algorithms for implementing network services with a guaranteed quality of service in an SDN-NFV environment." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0198.

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Le trafic réseau ne cesse de croître et de nouveaux besoins font aujourd’hui leur apparition avec de très fortes contraintes en termes de ressources et de qualité de service. Pour y faire face la 5G propose une centralisation du contrôle et une abstraction des ressources basées sur SDN et NFV ce qui permet une automatisation du déploiement des services, une optimisation de l’usage des ressources et une réduction des coûts. SDN centralise le plan de contrôle du réseau et gère les ressources des liens tandis que NFV virtualise les ressources des nœuds et transforme les fonctions réseau en VNFs. Dans cette thèse, nous analysons et proposons de résoudre certaines difficultés que pose la mise en place de services réseau dans cet écosystème. Nous abordons d’abord la mise en place d’un service de connectivité à qualité de service garantie. Afin d’éviter un afflux de messages vers le contrôleur et un délai dans l’application de la politique d’accès nous transférons son exécution dans le plan de données. Nous proposons ensuite de rajouter des fonctions réseau à nos services. Nous formulons un algorithme de placement visant à épargner les ressources là où elles sont rares pour placer un maximum de services. Nous doublons cet algorithme d’une technique d’abstraction de la topologie du réseau afin de permettre aux entités tierces d’exposer et vendre leurs ressources sans divulguer les détails de leurs infrastructures. Enfin, pour permette à l’opérateur réseau d’acheter les ressources nécessaires à l’établissement de ses services pour un coût minimal nous proposons un algorithme d’optimisation des réservations basé sur les offres des opérateurs de datacenters ainsi que sur des prévisions de trafic
Network traffic keep growing and newneeds are emerging today with strong requirements in terms of resources and quality of service. To face them 5G relies on control plane centralization and abstraction of resources based on SDN and NFV which allow network services deployment automation, resources utilization optimization and cost reductions. SDN centralizes the network control plane and manages link resources while NFV virtualizes node resources and turns network functions into VNFs. In this thesis we analyze some of the difficulties raised by the establishment of a network service in this context and we propose solutions to solve them. We first tackle the setup of a connectivity service with guaranteed quality of service. To avoid a massive flow of monitoring information to the controller and a delay in the enforcement of the policy we transfer the policy’s execution to the data plane. Then our goal is to add network functions to our services. We design a placement algorithm that spare resources where they are scarce to save them for services that need them to place a maximum of services. We develop a topology abstraction technique to allow other tenants to expose and sell their resources without disclosing the details of their infrastructures. Finally, to help the network operator to buy the resources required to instantiate its network services at a minimal cost we propose an algorithm that optimizes resource reservations based on cloud operators’ commercial offers and network operator’s traffic predictions
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Alharbi, Faisal. "SDN-BASED MECHANISMS FOR PROVISIONING QUALITY OF SERVICE TO SELECTED NETWORK FLOWS." UKnowledge, 2018. https://uknowledge.uky.edu/cs_etds/72.

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Despite the huge success and adoption of computer networks in the recent decades, traditional network architecture falls short of some requirements by many applications. One particular shortcoming is the lack of convenient methods for providing quality of service (QoS) guarantee to various network applications. In this dissertation, we explore new Software-Defined Networking (SDN) mechanisms to provision QoS to targeted network flows. Our study contributes to providing QoS support to applications in three aspects. First, we explore using alternative routing paths for selected flows that have QoS requirements. Instead of using the default shortest path used by the current network routing protocols, we investigate using the SDN controller to install forwarding rules in switches that can achieve higher bandwidth. Second, we develop new mechanisms for guaranteeing the latency requirement by those applications depending on timely delivery of sensor data and control signals. The new mechanism pre-allocates higher priority queues in routers/switches and reserves these queues for control/sensor traffic. Third, we explore how to make the applications take advantage of the opportunity provided by SDN. In particular, we study new transmission mechanisms for big data transfer in the cloud computing environment. Instead of using a single TCP path to transfer data, we investigate how to let the application set up multiple TCP paths for the same application to achieve higher throughput. We evaluate these new mechanisms with experiments and compare them with existing approaches.
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Mouawad, Nadia. "SDN based Mobility Management and Quality of Service Provisioning for 5G Vehicular Networks." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASV003.

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Vehicle to Everything (V2X), y compris véhicule à véhicule (V2V) et véhicule à infrastructure (V2I), est la base de communications véhiculaires, où Les messages de sécurité routière active, d’infotainment et de gestion du trafic sont transmis sur des liaisons à bande passante élevée, à faible temps de latence et à haute fiabilité, ouvrant ainsi la voie à une conduite totalement autonome. L’objectif ultime des systèmes de communication V2X de la prochaine génération est de permettre une conduite coopérative sans accident. Pour atteindre cet objectif, le système de communication devra permettre un ensemble diversifié de cas d'usage, chacun avec un ensemble spécifique d'exigences. L'analyse des exigences relatives aux principales catégories de cas d’usage, en particulier les applications de temps réel critiques, souligne la nécessité d'une conception de système V2X efficace, capable de fournir les performances du réseau. La technologie de cinquième génération (5G), avec sa Qualité de Service (QoS) fournie en termes de capacité élevée et de faible temps de latence, est préconisée comme solution pour faire face aux exigences strictes imposées par les applications V2X.Dans cet écosystème 5G véhiculaire, diverses technologies de communication sont envisagés, allant des communications IEEE 802.11p, LTE, LTE-V aux Visible Light Communications. Par conséquent, l’hétérogénéité des technologies d’accès radio suscitera des inquiétudes quant à la gestion transparente de la mobilité et à la garantie de qualité de service.Cette thèse propose un nouveau système de gestion de la mobilité conçu pour les réseaux de véhicules 5G, basé sur la technologie émergente SDN (Software Defined Networking). SDN offre une programmabilité réseau qui vise à obtenir une allocation efficace des ressources du réseau et une gestion de la mobilité.Notre travail de recherche vise trois objectifs. Dans un premier temps, nous concevons une architecture de réseau de véhicules. Au sommet de cette architecture, nous implémentons deux Applications SDN, à savoir application de sélection de réseau et gestion de la mobilité Application. L'architecture proposée est renforcée par une solution de placement de contrôleur visant à réduire le temps de latence des communications. De plus, une préoccupation particulière est consacrée à la conception d’une application de sécurité active de la route SDN contrôlant l’emplacement des capteurs de vitesse sur les routes. L’application proposée vise à réduire le taux d’accidents, objectif principal du futur système de transport intelligent.Le deuxième objectif de cette thèse aborde le problème de la gestion de la mobilité.Ceci est réalisé en implémentant des applications liées à la mobilité SDN au sommet de la topologie de réseau adoptée. La première application est dédiée à la résolution du problème de sélection du réseau. Son objectif est de mapper les sessions V2X en cours sur la technologie correspondante. La deuxième application est conçue pour résoudre le handover; ceci est réalisé en utilisant la duplication de paquets et en introduisant un algorithme de routage efficace.Le troisième objectif de la thèse est axé sur l’approvisionnement en qualité de service pour les communications V2X
Vehicle to everything (V2X), including vehicle-to-vehicle (V2V) and vehicle-to-infrastructure(V2I), is the umbrella for the vehicular communication system, where active road safety, infotainment and traffic management messages are transmitted over high-bandwidth, low-latency, high-reliability links, paving the way to fully autonomous driving. The ultimate objective of next generation V2X communication systems is enabling accident-free cooperative driving that uses the available roadway efficiently. To achieve this goal, the communication system will need to enable a diverse set of use cases, each with a specific set of requirements.The main use case categories requirements analysis, specifically the critical realtime applications, points out the need for an efficient V2X system design that could fulfill the network performance. The Fifth Generation (5G) technology, with its provisioned QoS features in terms of high capacity and low latency, is advocated as a prominent solution to cope with the firm requirements imposed by V2X applications.In this multifaceted vehicular 5G ecosystem, diverse communication technologies are envisioned, spanning from IEEE 802.11p, LTE, LTE-V to vehicular visible light communications. Therefore, the heterogeneity of radio access technologies will raise a concern regarding the seamless mobility management and the quality of service guarantee.This thesis provides a novel mobility management scheme devised for 5G vehicular networks based on the emerging Software Defined Networking (SDN) technology.SDN provides network programmability that strives to achieve an efficient network resource allocation and mobility management.Our research work tackles three objectives. At a first stage, we design a software defined vehicular network topology. On the top of this topology, we implement twoSDN applications, namely Network Selection Application and Mobility Management Application. The proposed architecture is enhanced by a controller placement solution that aims at reducing communication latency. Moreover, a special concern is devoted to design a SDN road active safety application that controls speed traps placement. The proposed application aims at reducing accidents rate which is a main purpose of future Intelligent Transportation System.The second objective of this thesis tackles the mobility management problem. This is achieved by implementing SDN mobility related applications on the top of the adopted network topology. The first application is dedicated to solve the network selection problem; it aims at mapping running V2X sessions to the corresponding technology. The second application is conceived to solve the handover procedure; this is achieved using packets duplication and introducing an efficient routing algorithm.The third thesis objective is focused on QoS provisioning for V2X communications
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Кузнєцов, Ярослав Іванович. "Спосіб балансування навантаження в масштабних програмноконфігурованих мережах." Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/34050.

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Робота складається із вступу, трьох розділів та одного додатку. Загальний обсяг роботи: 69 аркуші основного тексту, 41 ілюстрація, 6 таблиць. При підготовці використовувалася література з 38 різних джерел. Актуальність. Дедалі більшу популярність набуває стрімінгові сервіси, зростає кількість мережевих сервісів та абонентів мережі, що потребують забезпечення якості обслуговування. Традиційні мережі наближаються до своєї межі ефективності. Альтернативою традиційним мережам є централізована архітектура SDN. Ідея технології SDN не є новою, проте активне впровадження технології припадає лише на останні 15 років. Однією із важливих задач при організації мережі є задача балансування трафіку, що включає в собі маршрутизацію та забезпечення якості обслуговування. Використання нової технології вимагає розробки нових алгоритмів та протоколів, або адаптації традиційних, задача балансування трафіку є актуальною. Мета і завдання дослідження. Метою магістерської роботи є розроблення методу, що дозволить маршрутизувати трафік по оптимальним шляхам, уникаючи високої затримки та забезпечення більш рівномірного завантаження мережі шляхом балансування трафіку, з використанням можливостей програмно-конфігурованих мереж. Для досягнення мети дослідження поставлено і вирішено такі завдання: • дослідження структури та принципів побудови програмноконфігурованих мереж; • дослідження методів масштабування програмно-конфігурованих мереж; • дослідження методів забезпечення якості обслуговування в класичних та програмно-конфігурованих мережах; • Дослідження методів маршрутизації в програмно-конфігурованих мережах; • Дослідження методів рішення задач багатокритеріальної оптимізації; • Pозробка методу балансування трафіку в програмно-конфігурованих мережах; • Розробка програмного модулю на основі розробленого методу; • Ілюстрація роботи моделі та аналіз отриманих результатів. Об’єкт дослідження – процес пошуку оптимального шляху між вузлами в програмно-конфігурованих мережах. Предмет дослідження – методи маршрутизації та визначення оптимальності маршруту в програмно-конфігурованих мережах. Методи досліджень. Для досягнення поставлених в магістерській роботі задач, використано методи теорії графів, методи моделювання, методи вирішення задач багатокритеріальної організації. Проведене дослідження дає можливість використання розробленої моделі в SDN мережах в якості застосунку контролера та виконувати емуляцію роботи мережі для прогнозування трафіку та завантаженості компонентів мережі. Особистий внесок здобувача. Магістерське дослідження є самостійно виконаною роботою, в якій відображено особистий авторський підхід та особисто отримані теоретичні та прикладні результати, що відносяться до вирішення задачі маршрутизації та контролю трафіку в SDN мережах. Формулювання мети та завдань дослідження проводилось спільно з науковим керівником. Практична цінність. Отримані результати можуть використовуватися у майбутніх дослідженнях за напрямками: • вдосконалення методів маршрутизації; • аналіз та прогнозування трафіку в SDN; • балансування навантаження в SDN мережах.
Current work consists of receipt, three sections and one application. Total amount of work: 69 pages of the main text, 41 illustrations, 6 tables. By preparation a literature from 38 different sources was used. Topic Relevance. The increasing popularity acquires streaming services, the number of network services and subscribers of network grows that need ensuring quality of service. Traditional networks come nearer to the limit of efficiency. An alternative to traditional networks is the centralized architecture of SDN. The idea of SDN technology is not new, however active implementation of technology falls only on the last 15 years. The problem of balancing of traffic is one of important tasks at the organization of network that includes in itself routing and ensuring quality of service. Use of new technology demands development of new algorithms and protocols, or adaptation traditional, the problem of balancing of traffic is relevant. Research goal. The research goal of the master's thesis is development of a method that will allow to route traffic on optimal ways, avoiding a high delay and ensuring more uniform loading of network by balancing of traffic, with use of opportunities of software defined networks. For achievement of the goal of a research it is put and solved the following tasks: • Research of structure and the principles of construction software defined networks; • Researches of methods scaling software defined networks; • Researches of methods of ensuring quality of service in classical and software defined networks; • Researches of methods of routing in software defined networks; • Researches of methods of solving problems of multicriterial optimization; • Development of a method of balancing of traffic in software defined networks; • Development of the program module on the basis of the developed method; • Illustration of work of model and the analysis of the received results. Object of research – Process of search of an optimal way between nodes in software defined networks. Subject of research – Methods of routing and determination of optimality of a route in software defined networks. Methods of research. For achievement of the tasks set in the master's thesis, it is used methods of the theory of graphs, modeling methods, methods of the solution of tasks of the multicriteria organization. The conducted research gives the chance of use of the developed model in SDN networks as an application of the controller and to carry out emulation of network functioning for forecasting of traffic and load of components of network. Scientific contribution. The master research is independently done work in which it is reflected personal author's approach and personally received theoretical and applied results relating to the solution of a problem of routing and control of traffic in SDN networks. A formulation of the purpose and tasks the research was conducted together with the research supervisor. Practical value of obtained results. The received results can be used in future researches on the directions: • to improvement of methods of routing; • the analysis and forecasting of traffic in SDN; • balancing of loading in SDN networks.
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Toufga, Soufian. "Vers des réseaux véhiculaires (VANET) programmables grâce à la technologie SDN (software defined network)." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30128.

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Le concept de réseau véhiculaire qui initialement prônait essentiellement des communications de véhicules à véhicules s'ouvre à d'autres types de communications impliquant véhicules et infrastructure (réseau), cloud ou piétons, etc. afin de pouvoir répondre aux besoins de la grande variété des nouvelles applications envisagées dans le cadre du Système de Transport Intelligent (ITS: Intelligent Transportation System). La multitude des technologies réseau d'accès, la très forte mobilité des véhicules et leur forte densité en milieu urbain ainsi que la prédominance des communications sans-fil en font un réseau hétérogène, avec des caractéristiques très dynamiques, dont certaines peu prévisibles, et sujet à des problèmes d'échelle. Face à ces difficultés, une piste envisagée par la communauté scientifique est d'appliquer le paradigme SDN (Software Defined Network) aux réseaux véhiculaires comme moyen pour, d'une part permettre l'hybridation et l'unification du contrôle des différentes technologies réseaux d'accès et, d'autre part, tirer partie de la vue centralisée du réseau et des données contextuelles venues du cloud pour développer des nouveaux algorithmes de contrôle pouvant potentiellement reposer sur la prédiction/estimation de l'état du réseau et donc anticiper certaines décisions de contrôle. C'est donc dans ce cadre que s'inscrit ce travail de thèse dont les contributions visent à développer le concept de réseaux véhiculaires définis par logiciel SDVN (Software Defined Vehicular Network). Quatre contributions y sont développées. La première précise l'architecture d'un réseau véhiculaire SDN hybride capable de répondre aux défis décrits ci-avant. Cette architecture est complémentée par une solution de placement des contrôleurs SDN. Nous proposons une approche dynamique capable d'ajuster le placement optimal des contrôleurs en fonction des changements de la topologie réseau dues aux fluctuations du trafic routier. Ce travail aborde également le problème de la vision globale du réseau qu'un contrôleur SDN peut se constituer, vision préalable et pierre angulaire à toute fonction de contrôle réseau. A ce problème, nous proposons des amendements et extensions au service de découverte de topologie "de fait" conçu pour les réseaux filaires pour l'adapter au contexte véhiculaire. En complément au service de découverte, nous proposons également un service d'estimation de topologie basé sur des techniques d'apprentissage automatique (Machine Learning) pour offrir aux fonctions de contrôle réseau une vision potentielle de l'état futur du réseau et donc les ouvrir à un contrôle proactif et intelligent du réseau
The vehicular network concept, which initially focused on vehicle-to-vehicle communication, is opening up to other types of communications involving vehicles and infrastructure (network), cloud or pedestrians, etc. to meet the needs of the wide variety of new applications envisaged in the framework of the Intelligent Transportation System (ITS). The multitude of network access technologies, the very high mobility of vehicles and their high density in urban areas, and the predominance of wireless communications make it a heterogeneous network, with very dynamic characteristics, some of which are difficult to predict, and subject to scalability problems. Given these issues, one direction, considered by the scientific community, is to apply the SDN (Software Defined Network) paradigm to vehicular networks as a means of, on the one hand, enabling the hybridization and unification of control of different network access technologies and, on the other hand, taking advantage of the centralized view of the network and contextual data from the cloud to develop new control algorithms that can potentially rely on the prediction/estimation of the network state and thus anticipate certain control decisions. Therefore, this thesis is part of this framework. Its contributions aim at developing the concept of SDVN (Software Defined Vehicular Network). Four contributions are developed. The first one specifies the architecture of a hybrid SDN vehicular network capable of meeting the challenges described above. This architecture is complemented by an SDN controller placement solution. We propose a dynamic approach capable of adjusting the optimal placement of controllers according to network topology changes due to road traffic fluctuations. This work also covers the problem of global network vision that an SDN controller can build up, which is a prerequisite and the cornerstone of any network control function. To this problem, we propose amendments and extensions to the "de facto" topology discovery service designed for wired networks to adapt it to the vehicular context. As a complement to the discovery service, we also propose a topology estimation service based on Machine Learning techniques to provide network control functions with a potential vision of the future state of the network and thus open them to proactive and intelligent network control
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Zaman, Faisal Ameen. "VN Embedding in SDN-based Metro Optical Network for Multimedia Services." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35933.

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Currently a growing number of users depend on the Edge Cloud Computing Paradigm in a Metro Optical Network (MON). This has led to increased competition among the Cloud Service Providers (CPs) to supply incentives for the user through guaranteed Quality of Service (QoS). If the CP fails to guarantee the QoS for the accepted request, then the user will move to another CP. Making an informed decision dynamically in such a sensitive situation demands that the CP knows the user's application requirements. The Software Defined Networking (SDN) paradigm enabled the CP to achieve such desired requirement. Therefore, a framework called Virtual Network Embedding on SDN-based Metro Optical Network (VNE-MON) is proposed in this Thesis. The use of SDN paradigm in the framework guarantees profit to the CP as well as QoS to the user.\par The design concept of the SDN control plane, raises concerns regarding its scalability, reliability and performance compared to a traditionally distributed network. To justify concerns regarding the SDN, the performance of VNE-MON and its possible dependancy on the controller location is investigated. Several strategies are proposed and formulated using Integer Linear Programming to determine the controller location in a MON. Performance results from the assessment of the VNE-MON illustrates that it is more stable compare to GMPLS-based network. It is evident that the controller location's attributes have a significant effect on the efficacy of the accepted VN request.
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Bendriss, Jaafar. "Cognitive management of SLA in software-based networks." Thesis, Evry, Institut national des télécommunications, 2018. http://www.theses.fr/2018TELE0003/document.

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L’objectif de la thèse est d’étudier la gestion de bout en bout des architectures à la SDN, et comment nos briques OSS (Operation Support System) doivent évoluer: cela implique d’étudier les processus métier associés, leurs implémentations ainsi que l’outillage nécessaire. Les objectifs de la thèse sont donc de répondre aux verrous suivants:1. Identifier les changements impliqués par l’émergence de ces réseaux programmables sur les architectures de gestions en termes d’exigences ou "requirements". L’étude peut être focalisée sur un type de réseau, mobile par exemple. 2. Identifier l’évolution à apporter aux interfaces de gestions actuelles: quelles alternatives aux FCAPS (fault, configuration, accounting, performance, and security) ? Quels changements à apporter aux couches de gestions allant du gestionnaire d’équipement ou "Element Management System" jusqu’au OSS ?
The main goal of the PhD activities is to define and develop architecture and mechanisms to ensure consistency and continuity of the operations and behaviors in mixed physical/virtual environments, characterized by a high level of dynamicity, elasticity and heterogeneity by applying a cognitive approach to the architecture where applicable. The target is then to avoid the "build it first, manage it later" paradigm. The research questions targeted by the PhD are the following: 1. Identify the changes on Network Operation Support Systems implementation when using SDN as a design approach for future networks. The study could be restricted to mobile networks for example, or sub-part of it (CORE networks, RAN, data centers, etc); 2.Identify the needed evolution at the management interfaces level: a. Shall we need alternative to the well-known FCAPS and do we still need the element management system? b. What will change to provision an SDN based service? c. How to ensure resiliency of SDN based networks?
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Rodrigues, Tomás Marques. "End-user quality of service and experience in mobile networks." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23465.

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Mestrado em Engenharia de Computadores e Telemática
Mobile network operators use dedicated equipment (probes) to obtain performance, QoS and QoE metrics for their networks and services. This project aims to develop an Android application with probing features, not only complementing the dedicated equipment in the collection of information regarding performance, QoS and QoE, but also detecting problems in the network and its services automatically in mobile network commercial terminal and providing customer test tools and support for faster troubleshooting.
Os operadores de redes móveis recorrem a equipamentos dedicados (sondas) para obtenção de métricas relativas ao desempenho, QoS e QoE das suas redes e serviços. Pretende-se desenvolver uma aplicação Android com funcionalidades de sonda, não só complementando os equipamentos dedicados na recolha de informação relativa ao desempenho, QoS e QoE, como também detetando automaticamente problemas ao nível da rede e dos seus serviços no próprio terminal do cliente final, disponibilizando ferramentas de teste e suporte para uma resolução de problemas mais rápida e eficaz.
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Chang, Cybele T. Z. (Cybele Tsai Zin) 1973. "Improving jitney service quality : an appropriate governance model for San Juan, Puerto Rico." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/65063.

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Thesis (M.C.P.)--Massachusetts Institute of Technology, Dept. of Urban Studies and Planning, 2002.
Includes bibliographical references (p. 154-160).
San Juan, Puerto Rico, like many North American cities, has turned to rail lines as a solution to the mounting traffic congestion threatening the urban environment. However, a rail system must rely on other transit modes to provide feeder services in order to expand its reach and broaden its customer base. This requires intermodal integration. The challenge facing the future success of Tren Urbano, the new rail system projected to open in the next two years, is the integration of the publicos. The publico is the owner operated jitney service indigenous to Puerto Rico that the government anticipates will offer crucial feeder services to Tren Urbano. For intermodal integration to succeed, publicos must offer comparable service quality. Unfortunately, the service quality of publico transit is poor as a consequence of the long-term decline of the publico industry. Therefore, the goal of the government is to improve publico service quality so it is comparable with the rest of the transit system, while recognizing the unique owner operator quality of the industry. This thesis examines four different jitney systems in North America. The study documents the development of the jitney service, how different cities govern jitney operators, and what affect the governance structure has on the quality of service. The purpose of this study is to determine what kind of governance structure leads to a high quality of jitney service. The study also examines what other factors contribute to high quality service. The ultimate goal is to apply the findings to San Juan, Puerto Rico in order to define future publico reforms. The case studies illustrate that North American jitney services all rely on hybrid governance models, consisting of government controls and self-regulating mechanisms. The study suggests that a hybrid governance structure that is based on cooperation between operators and government regulators leads to superior service quality. However, service quality is not merely a function of governance structure. Service quality also depends on the profitability of the jitney service, institutional strength, and the context of the industry. In a highly profitable setting, industry actors will spontaneously mobilize and provide a high quality of service. Consequently, the recommendations from this study examine ways of improving the profitability of the publico industry in order to improve the quality of service. In an unprofitable environment, the government must take the lead in developing other strategies to encourage service quality improvements. The recommendations in this study also suggests that the government proactively assist the publico industry improve service quality though various institutional and governance strategies.
by Cybele T.Z. Chang.
M.C.P.
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Books on the topic "Quality of Service in SDN"

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Watson, Nigel. A century of quality and service: [Martin & Son, Edinburgh Ltd.] : a short history by Nigel Watson. Cambridge: Granta, 1995.

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San Francisco Public Utilities Commission. WSIP system assessment for levels of service objectives: Final report. San Francisco: San Francisco Public Utilities Commission, 2006.

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Quality in Services (QUIS) (2nd 1990 Norwalk, Connecticut). Service quality. Edited by Gummesson Evert 1936- and Scheuing Eberhard E. Bradford: MCB, 1991.

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Beaton, M. Professional service: Service quality. Melbourne: Beaton Associates, 1991.

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Brent (England). Arts & Libraries Department. Quality and service. [England]: Brent Council, 1995.

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Øvretveit, John. Managing service quality. Brunel: BIOSS, Brunel University, 1989.

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Quality customer service. 3rd ed. Menlo Park, Calif: Crisp Publications, 1993.

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Evans, Gerry. Evaluating service quality. Cardiff: S.C.O.V.O, 1991.

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Lawrie, Alan. Managing quality of service. London: Directory of Social Change, 1995.

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Northern Health and Social Services Board. Quality of service strategy. [Ballymena]: The Board, 1990.

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Book chapters on the topic "Quality of Service in SDN"

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Fordham, Stuart. "Policies and Quality of Service." In Learning SD-WAN with Cisco, 283–324. Berkeley, CA: Apress, 2021. http://dx.doi.org/10.1007/978-1-4842-7347-0_10.

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Roy, Radhika Ranjan. "Quality-of-Service Support in SDP." In Handbook of SDP for Multimedia Session Negotiations, 515–46. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, 2018. | “A CRC title, part of the Taylor & Francis imprint, a member of the Taylor & Francis Group, the academic division of T&F Informa plc.”: CRC Press, 2018. http://dx.doi.org/10.1201/9781351023900-12.

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Al-Haddad, Ronak, and Erika Sanchez Velazquez. "A Survey of Quality of Service (QoS) Protocols and Software-Defined Networks (SDN)." In Advances in Intelligent Systems and Computing, 527–45. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01177-2_38.

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Makolkina, Maria, Ammar Muthanna, and Steve Manariyo. "Quality of Experience Estimation for Video Service Delivery Based on SDN Core Network." In Lecture Notes in Computer Science, 683–92. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-67380-6_65.

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Lai, Chin-Feng, Wei-Ting Chen, Chian-Hao Chen, Chia-Yun Kuo, and Ying-Hsun Lai. "A Quality of Experience Aware Adaptive Streaming Service for SDN Supported 5G Mobile Networks." In Lecture Notes in Electrical Engineering, 283–96. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3187-8_29.

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Akinola, Ayotuyi T., Matthew O. Adigun, and Pragasen Mudali. "Incorporating Stability Estimation into Quality of Service Routing in an SDN-Based Data Centre Network." In Proceedings of Fifth International Congress on Information and Communication Technology, 406–16. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5859-7_40.

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Qafzezi, Ermioni, Kevin Bylykbashi, Phudit Ampririt, Makoto Ikeda, Keita Matsuo, and Leonard Barolli. "A Fuzzy-Based System for Assessment of Quality of Service Communication Links in SDN-VANETs." In Lecture Notes in Networks and Systems, 120–28. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-90072-4_12.

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Navarro, Freddy Mariñez. "Citizens and Local Government Management Innovations. Implementation of the New Public Service (NPS) in Municipal Institute Family, San Pedro Garza García, Nuevo León, México." In Applying Quality of Life Research, 155–68. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32091-5_8.

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Weik, Martin H. "service quality." In Computer Science and Communications Dictionary, 1559. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_17112.

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Hughes, Vera. "Quality Service." In People Skills, 131–39. London: Macmillan Education UK, 1992. http://dx.doi.org/10.1007/978-1-349-12527-2_11.

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Conference papers on the topic "Quality of Service in SDN"

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Zhao, Laiping, Jingyu Hua, Xin Ge, and Sheng Zhong. "Traffic engineering in hierarchical SDN control plane." In 2015 IEEE 23rd International Symposium on Quality of Service (IWQoS). IEEE, 2015. http://dx.doi.org/10.1109/iwqos.2015.7404732.

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Zhou, Haifeng, Chunming Wu, Wen Gao, Ming Jiang, Tingting Pan, Min Huang, and Le Wang. "Improving QoS in SDN with lossless multi-domain reconfigurations." In 2015 IEEE 23rd International Symposium on Quality of Service (IWQoS). IEEE, 2015. http://dx.doi.org/10.1109/iwqos.2015.7404714.

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Koumaras, Harilaos, Michail-Alexandros Kourtis, Christos Sakkas, George Xilouris, and Stavros Kolometsos. "In-service Video Quality assessment based on SDN/NFV techniques." In 2016 23rd International Conference on Telecommunications (ICT). IEEE, 2016. http://dx.doi.org/10.1109/ict.2016.7500385.

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Huang, Xi, Simeng Bian, Ziyu Shao, and Hong Xu. "Predictive switch-controller association and control devolution for SDN systems." In IWQoS '19: IEEE/ACM International Symposium on Quality of Service. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3326285.3329070.

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Durner, Raphael, Andreas Blenk, and Wolfgang Kellerer. "Performance study of dynamic QoS management for OpenFlow-enabled SDN switches." In 2015 IEEE 23rd International Symposium on Quality of Service (IWQoS). IEEE, 2015. http://dx.doi.org/10.1109/iwqos.2015.7404730.

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Kim, Yohan, Juman Park, Dae-Hoon Kwon, and Hyuk Lim. "Buffer Management of Virtualized Network Slices for Quality-of-Service Satisfaction." In 2018 IEEE Conference on Network Function Virtualization and Software Defined Networks (NFV-SDN). IEEE, 2018. http://dx.doi.org/10.1109/nfv-sdn.2018.8725780.

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Huang, Nanyang, Qing Li, Dong Lin, Xiaowen Lit, Gengbiao Shen, and Yong Jiang. "Software-Defined Label Switching: Scalable Per-Flow Control in SDN." In 2018 IEEE/ACM 26th International Symposium on Quality of Service (IWQoS). IEEE, 2018. http://dx.doi.org/10.1109/iwqos.2018.8624177.

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Lu, Xiaoyuan, and Yanwei Xu. "SFabric: A scalable SDN based large layer 2 data center network fabric." In 2015 IEEE 23rd International Symposium on Quality of Service (IWQoS). IEEE, 2015. http://dx.doi.org/10.1109/iwqos.2015.7404704.

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Siyuan Huang, Jin Zhao, and Xin Wang. "HybridFlow: A lightweight control plane for hybrid SDN in enterprise networks." In 2016 IEEE/ACM 24th International Symposium on Quality of Service (IWQoS). IEEE, 2016. http://dx.doi.org/10.1109/iwqos.2016.7590411.

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Qing Li, Lei Wang, Yong Jiang, Guangwu Hu, Mingwei Xu, and Qingmin Liao. "FICUS: Fast Incremental Consistent Update in SDN based on relation graph." In 2016 IEEE/ACM 24th International Symposium on Quality of Service (IWQoS). IEEE, 2016. http://dx.doi.org/10.1109/iwqos.2016.7590421.

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Reports on the topic "Quality of Service in SDN"

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Polk, J., S. Dhesikan, and G. Camarillo. Quality of Service (QoS) Mechanism Selection in the Session Description Protocol (SDP). RFC Editor, March 2009. http://dx.doi.org/10.17487/rfc5432.

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Gómez Vidal, Analía, Fabiana Machado, and Darcia Datshkovsky. Water and Sanitation Services in Latin America: Access and Quality Outlook. Inter-American Development Bank, April 2021. http://dx.doi.org/10.18235/0003285.

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Tracking progress towards the Sustainable Development Goals (SDGs) is critical to evaluate how far the water and sanitation sector is from achieving these targets, and to guarantee that the solutions and strategies implemented get everyone closer to them. But this is not a simple task. To truly assess collective progress towards achieving SDG 6 (and all other goals), it is fundamental to count on standardized measures that help track all types of access, their reliability, and their quality. Existing data tend to lack comparability across sources and locations because they rely on different definitions and categories. Samples are often not representative of all groups within the population. More developed areas are more likely to collect data, which results in the overrepresentation of groups that enjoy better services. Still in some areas and for some categories of information data is not available at all. In response to these challenges, the Inter-American Development Bank (IDB) partnered with the Latin American Public Opinion Project (LAPOP) to gather nationally representative and comparable data in 18 countries in the region. The goal of this effort was to provide an initial outlook of the current landscape of water and sanitation services in the region, using two batteries of questions in the LAPOP questionnaire for the 2018-2019 wave. The main message that arises is that the Latin American and the Caribbean region faces a wide range of challenges, that vary both across and within countries. Some areas face the primary challenge of closing access gaps, while others display higher deficiency in service quality, such as continuity. The gaps in quality of services, in particular, are not clearly perceived by users. In general, levels of satisfaction with the services received is quite high among the population, much higher than warranted by the objective measures of service quality. This raises important issues for accountability in the sector. If users are mostly satisfied with the current state of affairs, it is unlikely they will pressure governments and utilities to improve service delivery. A more in-depth analysis is required to understand the reasons behind these opinions and possible ways to raise awareness.
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Jung, Na Young. The Relationship Between Service Quality and Service Recovery Quality in Retail Stores. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/itaa_proceedings-180814-409.

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McCann, P., H. Tschofenig, T. Tsou, and A. Doria. Diameter Quality-of-Service Application. Edited by D. Sun and G. Zorn. RFC Editor, May 2010. http://dx.doi.org/10.17487/rfc5866.

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Jung, Na Young. Retail Service Quality and Service Recovery Quality: A Comparison Between Small and Large Retail Stores. Ames: Iowa State University, Digital Repository, 2017. http://dx.doi.org/10.31274/itaa_proceedings-180814-1788.

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Reeves, Douglas, Felix Wu, Peter Wurman, Dan Stevenson, and Xlaoyong Wu. Protecting Network Quality of Service Against Denial of Service Attacks. Fort Belvoir, VA: Defense Technical Information Center, December 2003. http://dx.doi.org/10.21236/ada420839.

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Levin, Timothy E., Cynthia E. Irvine, and Evdoxia Spyropoulou. Quality of Security Service: Adaptive Security. Fort Belvoir, VA: Defense Technical Information Center, December 2004. http://dx.doi.org/10.21236/ada435861.

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O'Brien, Liam, Len Bass, and Paulo Merson. Quality Attributes and Service-Oriented Architectures. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada441830.

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Shenker, S., C. Partridge, and R. Guerin. Specification of Guaranteed Quality of Service. RFC Editor, September 1997. http://dx.doi.org/10.17487/rfc2212.

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Irvine, Cynthia, and Tim Levin. Quality of Security Service: An Introduction. Fort Belvoir, VA: Defense Technical Information Center, April 2000. http://dx.doi.org/10.21236/ada572032.

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