Assuring Quality of Service by Using Openflow Protocol

OpenFlow currently is the only one protocol that can implement ideas of the Software Defined Networking pioneers. The Protocol is unique because of ability to separate any network device control and data planes. All network intelligence is (logically) centralized in dedicated controllers. Objective of this article to propose a new method that enhances QoS in data networks by using OpenFlow protocol.

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On the features of Software Defined Networking for the QoS provision in data networks

Inge CUC ◽

10.17981/ingecuc.14.2.2018.10 ◽

2018 ◽

Vol 14 (2) ◽

pp. 106-115

Author(s):

Jonier Hernando Porras Duque ◽

Daniel Orlando Ducuara Beltrán ◽

Gustavo Adolfo Puerto Leguizamón

Keyword(s):

Quality Of Service ◽

Network Architecture ◽

Software Defined Networking ◽

Data Networks ◽

Centralized Control ◽

Transport Services ◽

Use Of Resources ◽

Fast Evolution ◽

Base Network

Introduction: The traditional networks mostly implement devices where the control plane is distributed and mixed with the data plane; this fact does not allow a fast evolution towards a process that contributes to improving the transport of services. Otherwise, Software Defined Networking is a set of transport services that optimize the use of resources as these have a centralized network structure. Objective: To determine the aspects that enable software-defined networking to provide quality of service features in data networks. Methodology: This study is performed through network simulation over the same base network and under the same working conditions by carrying out measurements of the packet forwarding response time and management of the transported bandwidth. This study includes the demonstration of the multimedia content transport over a network architecture defining priorities to the links. Results: The outcomes show how the Software Defined Networking achieves better management of data transmission through the base network. In the same way, the previous outcomes are reinforced with those obtained in the quality of service test performed on the streaming of a multimedia flow. Conclusions: Due to the centralized control of Software Defined Networking, forwarding functions with the quality of service features are enabled in data networks based on layer-2 devices.

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Virtual Router Design and Modeling for Future Networks with QoS Guarantees

Electronics ◽

10.3390/electronics10101139 ◽

2021 ◽

Vol 10 (10) ◽

pp. 1139

Author(s):

Mykola Beshley ◽

Natalia Kryvinska ◽

Halyna Beshley ◽

Oleg Yaremko ◽

Julia Pyrih

Keyword(s):

Quality Of Service ◽

Dynamic Reconfiguration ◽

Future Internet ◽

End Users ◽

Mathematical Representation ◽

Optimal Parameters ◽

Resource Virtualization ◽

Virtual Routers ◽

Network Device

A virtual router model with a static and dynamic resource reconfiguration for future internet networking was developed. This technique allows us to create efficient virtual devices with optimal parameters (queue length, queue overflow management discipline, number of serving devices, mode of serving devices) to ensure the required level of quality of service (QoS). An analytical model of a network device with virtual routers is proposed. By means of the mentioned mathematical representation, it is possible to determine the main parameters of the virtual queue system, which are based on the first in, first out (FIFO) algorithm, in order to analyze the efficiency of network resources utilization, as well as to determine the parameters of QoS flows, for a given intensity of packets arrival at the input interface of the network element. In order to research the guaranteed level of QoS in future telecommunications networks, a simulation model of a packet router with resource virtualization was developed. This model will allow designers to choose the optimal parameters of network equipment for the organization of virtual routers, which, in contrast to the existing principle of service, will provide the necessary quality of service provision to end users in the future network. It is shown that the use of standard static network device virtualization technology is not able to fully provide a guaranteed level of QoS to all present flows in the network by the criterion of minimum delay. An approach for dynamic reconfiguration of network device resources for virtual routers has been proposed, which allows more flexible resource management at certain points in time depending on the input load. Based on the results of the study, it is shown that the dynamic virtualization of the network device provides a guaranteed level of QoS for all transmitted flows. Thus, the obtained results confirm the feasibility of using dynamic reconfiguration of network device resources to improve the quality of service for end users.

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