Power reduction strategies with differentiated quality of protection in IP-over-WDM networks

2017 ◽  
Vol 73 (1-2) ◽  
pp. 81-94 ◽  
Author(s):  
Ali Hmaity ◽  
Francesco Musumeci ◽  
Massimo Tornatore
Keyword(s):  
Power Reduction ◽  
Wdm Networks ◽  
Ip Over Wdm ◽  
Quality Of Protection ◽  
Reduction Strategies

scholarly journals Preface to the December 2015 issue

2015 ◽  
Author(s):  
Héctor Cancela
Keyword(s):  
Distributed Computing ◽  
Computer Science ◽  
Optical Networks ◽  
Mobile Devices ◽  
Wdm Networks ◽  
Domain Name ◽  
Historical Climate ◽  
Quality Of Protection ◽  
Security Models

We are glad to present the last issue of 2015, completing Volume 18 of the CLEI Electronic Journal. This issue is comprised by the following regular papers.The first paper, “Quality of Protection on WDM networks: A Recovery Probability based approach”, by M. D. Rodas-Brítez and D. P. Pinto-Roa, features a proposal of a new quality of protection (QoP) paradigm for Wavelength Division Multiplexing optical networks. The new approach is flexible, allowing the network administrator to define and select a set of protection levels, based on recovery probabilities which measure the degree of conflict among primary lightpaths sharing backup lightpaths. To show the interest of the approach, a Genetic Algorithm is used to design a routing strategy by multi-objectiveoptimization, minimizing the number of blocked requests, the number of services without protection, the total differences between the requested QoP and the assigned QoP, and the network cost.The second paper, “Towards Scalability for Federated Identity Systems for Cloud-Based Environments”, by A.A. Pereira, J. B. M. Sobral and C. M. Westphall, addresses scalability issues in identity management for cloud computing environments. The authors propose an adapted sticky-session mechanism, as an alternative approach to the more common distributed memory approach, and discuss the implications in therms of computational resources, throughput and overall efficiency. The following work, “Formal Analysis of Security Models for Mobile Devices, Virtualization Platforms, and Domain Name Systems”, by G. Betarte and C. Luna,tackles security models for security-critical applications in three areas: mobile devices, virtualization platforms, and domain name systems. The authors develop formalizations using the Calculus of Inductive Constructions, to study different usual variants of security models in these platforms and their properties.The last paper of this issue is “Digi-Clima Grid: image processing and distributed computing for recovering historical climate data”, by authors S. Nesmachnow, G. Usera and F. Brasileiro. This paper reports an experience of implementing semi-automatic techniques for digitalizing and recovering historical climate records applying parallel computing techniques over distributed computing infrastructures, which was applied to Uruguayan historical climate data.As we complete now the eighteenth year of continued existence of CLEIej, we thank the regional community for its continued support, and we encourage researchers working in computer science and its applications to consider submitting their work to CLEIej, as the the leading electronic, open access journal in Computer Science in Latin America.

scholarly journals Quality-of-service mechanisms in IP-over-WDM networks

2002 ◽  
Vol 40 (12) ◽  
pp. 38-43 ◽  
Author(s):  
A. Kaheel ◽  
T. Khattab ◽  
A. Mohamed ◽  
H. Alnuweiri
Keyword(s):  
Quality Of Service ◽  
Wdm Networks ◽  
Ip Over Wdm

Path-based Protection in WDM Networks with Differentiated Quality-of-Protection

2006 ◽  
Author(s):  
Yu Lin ◽  
Haitham Hamza ◽  
Jitender Deogun
Keyword(s):  
Wdm Networks ◽  
Quality Of Protection

scholarly journals Quality of Protection on WDM networks: A Recovery Probability based approach

2015 ◽  
Author(s):  
Marcelo Rodas-Brítez ◽  
Diego Pinto-Roa
Keyword(s):  
Genetic Algorithm ◽  
Optical Fibers ◽  
Wdm Networks ◽  
New Paradigm ◽  
Generic Level ◽  
Network Cost ◽  
Quality Of Protection ◽  
Resource Distributions ◽  
Probability Concept

WDM networks survivability needs a flexible quality of protection (QoP) due to the variety of existing connection demands, lack of fair resource distributions under traditional QoP and optimal resources assignment. Thus, this paper proposes a new paradigm of QoP based on generic levels of protection where the set of protection levels can be defined as the network administrator needs, i.e., a flexible QoP approach whose particular case is the traditional or non-flexible QoP approach. Essentially, the proposed generic level is based on the recovery probability concept which measures the grade of conflict among primary lightpaths that share backup lighpaths for link failure recovery. In order to study how this strategy impacts on the network cost, a Genetic Algorithm is proposed. It calculates the primary and backup lightpaths, considering a multi-objective optimization on the basis of lexicographical sorting approach. The Genetic Algorithm minimizes the number of blocked requests, the number of services without protection, the total differences between the requested QoP and the assigned QoP, and the network cost; all of which by considering the optical fibers used and subject to the wavelength usage as constraint. The experimental results indicate that the proposed approach –flexible QoP– is a promising strategy where the network cost, the number of requests and QoP levels are contradictory objective functions in environments with homogeneous and heterogeneous QoP requirements.

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