scholarly journals FSB-DReViSeR: Flow Splitting-Based Dynamic Replacement of Virtual Service Resources for Mobile Users in Virtual Heterogeneous Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Jean Frédéric Myoupo ◽  
Vianney Kengne Tchendji ◽  
Yannick Florian Yankam ◽  
Joël Casimir Tagne
Keyword(s):  
Quality Of Service ◽  
End Users ◽  
Virtual Networks ◽  
Virtual Paths ◽  
Dynamic Replacement ◽  
Service Resource ◽  
Suitable Amount ◽  
Flow Splitting ◽  
Resource Replacement

Virtual networks are sets of virtual devices that are interconnected through a physical network to provide services to end users. These services are usually heterogeneous (VOIP, VoD, streaming, etc.), exploit various amounts of resources (bandwidth, computing power, servers, etc.), and have topologies different from those of the substrate network. These variations in requirements are traditionally known as the architectural flexibility of virtual networks. Each virtual service is provided through a server called a virtual service resource. When a virtual service resource can no longer provide a good quality of service to end users due to the traffic variation generated by their mobility, two approaches are commonly implemented: provisioning the virtual network with resources or replacing the virtual service resource by migrating the service to another node that offers the most suitable amount of resource to satisfy the quality of service (QoS). In this paper, we propose a flow splitting-based dynamic virtual service resource replacement approach that allows for virtual service replacement across multiple virtual paths. Our approach is based on a graph topology that differs from those in the literature, which are based on tree topologies. The simulations performed in this study show that our approach significantly reduces the virtual service resource replacement time compared to other approaches.

scholarly journals Virtual Router Design and Modeling for Future Networks with QoS Guarantees

Electronics ◽  
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.

scholarly journals Authenticated Quality-of-Service Signaling for Virtual Networks

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
Roland Bless ◽  
Martin Röhricht ◽  
Christoph Werle
Keyword(s):  
Quality Of Service ◽  
Virtual Networks

Maintaining Redundancy in Peer-to-Peer Storage Systems

2010 ◽  
pp. 616-634
Author(s):  
Anwitaman Datta ◽  
Di Wu ◽  
Liu Xin ◽  
Adam Wierzbicki
Keyword(s):  
Quality Of Service ◽  
Storage Systems ◽  
End Users ◽  
Peer To Peer ◽  
Analytical Models ◽  
Storage Space ◽  
Storage Devices ◽  
Empirical Results ◽  
P2p Storage

Peer-to-Peer (P2P) storage systems leverage the combined storage capacity of a network of storage devices (peers) contributed typically by autonomous end-users as a common pool of storage space to store and share content. A major challenge in such a system comprising of autonomous participants is to guarantee quality of service in terms of persistence and availability of the stored content. This chapter focuses on the different possible design choices for maintaining redundancy in P2P storage systems, including algorithm details of maintenance mechanisms, analytical models to understand system’s dynamics, empirical results from simulation experiments as well as experiences from prototype deployments.

scholarly journals Optimizing and Load Balancing for Flash Crowd to Improve Quality of Service in Content Delivery Network

2019 ◽  
Vol 8 (11) ◽  
pp. 2568-2574
Keyword(s):  
Quality Of Service ◽  
Load Balancing ◽  
Content Delivery ◽  
End Users ◽  
Utility Computing ◽  
Content Delivery Network ◽  
Internet Service ◽  
Flash Crowd ◽  
Delivery Network

The online access has been increasing rapidly with the digitization of information, cheaper Internet service and affordable devices to access the Internet. This entails for not only handling increasing number of web requests but also meeting Quality of Service (QoS) requirements of end-users. Content Delivery Network (CDN) system is used to make better the performance of origin server by storing the popular contents on surrogate servers. The contents are disseminated to the web users through surrogate servers. The performance of CDN system relies on the selection of appropriate surrogate server to satisfy end-users’ requests. The proposed method named Load Balancing using Neighbors and Utility Computing (LBNUC) takes into account requests arrival rate, load on surrogate servers, end-users’ changing demand and capacity of surrogate servers. The aim is efficient utilization of CDN resources to minimize the time required to serve end-users requests and the cost of servicing requests. This method is also effective in handling of flash crowd situation by monitoring request rate. It handles this situation with support from neighbor surrogate servers and arranging additional resources, if required, through utility computing to meet QoS requirement of end-users.

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