Using SDN in Centralized Data Centers in Power Communication Networks for Data and Network Reliability

Author(s):  
Yang Wang ◽  
Yiming Yu ◽  
Xin Li ◽  
Yongli Zhao ◽  
Jie Zhang
Author(s):  
Musaria Karim Mahmood ◽  
Osman Ucan ◽  
Zahraa Zaidan ◽  
Sulaiman M. Karim

<span>Network reliability is valuable in establishing a survivable communication network. Reliability evaluation algorithms are used in the design stage and during the network deployment. This work presents a new multistage hybrid technique for two-terminal reliability evaluation problem. It is based on a combination of graph reduction techniques and tie-set method. A new approach has been introduced for deducing tie-sets in a network containing both unidirectional and bi-directional edges. The proposed algorithm can be applied for both simple and complex networks without restrictions. The results confirm that new algorithm evaluates network's reliability with decreasing computing time compared to classical algorithms. The results for a case study of a 20-node network have demonstrated that the required time for reliability evaluation is decreased from (t&gt;1 hour) in the case of using a classical algorithm, to (t&lt;1 second) for the new algorithm.</span>


Telecom IT ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 93-99
Author(s):  
M. Lobastova ◽  
A. Matyukhin ◽  
A. Muthanna

This article describes the challenges of modern communication networks reliability, analyses ITU-T recommendations and regulations governing the communication networks reliability in Russian Federation. The network clock network is an integral part of digital communication networks. Therefore, the issue of the synchronization network reliability should be given great attention. Research subject. In this article, we discussed the reliability of the clock synchronization network. Method. The main mathematical tools are graph theory and probability theory. To implement the proposed method for assessing the structural reliability of the synchronization network, the direct search method is used. Core results. The results allow us to conclude that the proposed method can be applied to assess the structural reliability of the clock synchronization network. Practical relevance. The solution proposed in this article can be used for a reasonable assessment of the network structural reliability indicators, which is necessary for making a decision on the choice of a route for transmitting a synchronization signal.


2011 ◽  
Vol 65 ◽  
pp. 585-589
Author(s):  
Ping Wang ◽  
Ji Hong Shi ◽  
Ling Zhao ◽  
Rong Zong

A novel method was proposed to evaluate the reliability of power communication network based on self-organizing map via analyzing the problems of current power communication network reliability evaluation. This proposed method overcomes not only the influence of subjective factors on the evaluation, but also the problem of weight. Excellent results were obtained by applying the new model to evaluating the ten communication networks. Therefore, it is proven to be objective, reasonable and effective in practice.


2015 ◽  
Vol 26 (06) ◽  
pp. 667-675 ◽  
Author(s):  
Aysun Aytaç ◽  
Tufan Turaci

Several factors have to be taken into account in the design of large interconnection networks. Optimal design is important both to achieve good performance and to reduce the cost of construction and maintenance. Practical communication networks are exposed to failures of network components. Failures between nodes and connections happen and it is desirable that a network is robust in the sense that a limited number of failures does not break down the whole system. Robustness of the network topology is a key aspect in the design of computer networks. A variety of measures have been proposed in the literature to quantify the robustness of networks and a number of graph-theoretic parameters have been used to derive formulas for calculating network reliability. In this paper, we study the vulnerability of interconnection networks to the failure of individual nodes, using a graph-theoretic concept of domination and strong-weak domination numbers of the transformation graph Gxy+ as a measure of network robustness.


Author(s):  
Jean-Christophe Plantin

While Alphabet, Facebook, and Microsoft are mostly associated with online services and mobile applications, they now constitute important actors of the global communication infrastructure, as witnessed by their important investments in data centers, subsea cables, telecommunication networks, and non-terrestrial connectivity (such as drones, balloons, or satellites). Beyond these spectacular (and sometimes hypothetical) projects, this paper details how these tech companies are already changing the ways communication networks are managed. It shows that they become a dominant force shaping global connectivity by leveraging the platform logic that granted them their initial success in the web economy, and adapting it to communication infrastructures. Based on interviews with industry experts and network engineers, document analysis, and site visits, this paper offers a model to analyse this platformization of communication infrastructures: it consists of disaggregating existing networks components, inserting a platform which acts as new integrator, and making networks modular and programmable. This model extends scholarship on the platformization of social and economic life and shows how the same platform logic is at the center of the infrastructural expansion of tech giants and at the source of the power they gain over global connectivity.


Author(s):  
Zhu Han ◽  
Dusit Niyato ◽  
Walid Saad ◽  
Tamer Basar ◽  
Are Hjorungnes

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