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Author (up) Barrera, J.; Cancela, H.; Moreno, E. pdf  doi
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  Title Topological optimization of reliable networks under dependent failures Type
  Year 2015 Publication Operations Research Letters Abbreviated Journal Oper. Res. Lett.  
  Volume 43 Issue 2 Pages 132-136  
  Keywords Common-cause failure; Dependent failure; Reliable network design; Sample average approximation  
  Abstract We address the design problem of a reliable network. Previous work assumes that link failures are independent. We discuss the impact of dropping this assumption. We show that under a common-cause failure model, dependencies between failures can affect the optimal design. We also provide an integer-programming formulation to solve this problem. Furthermore, we discuss how the dependence between the links that participate in the solution and those that do not can be handled. Other dependency models are discussed as well. (C) 2014 Elsevier B.V. All rights reserved.  
  Address [Barrera, Javiera; Moreno, Eduardo] Univ Adolfo Ibanez, Fac Sci & Engn, Santiago, Chile, Email: javiera.barrera@uai.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Science Bv Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0167-6377 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000351968300003 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 480  
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Author (up) Jimenez, D.; Barrera, J.; Cancela, H. doi  openurl
  Title Communication Network Reliability Under Geographically Correlated Failures Using Probabilistic Seismic Hazard Analysis Type
  Year 2023 Publication IEEE Access Abbreviated Journal IEEE Access  
  Volume 11 Issue Pages 31341-31354  
  Keywords Telecommunication network reliability; Reliability; Earthquakes; Optical fiber networks; Seismic measurements; Reliability engineering; Optical devices; Hazards; geographically correlated failures; fragility functions; seismic risk analysis; simulation  
  Abstract The research community's attention has been attracted to the reliability of networks exposed to large-scale disasters and this has become a critical concern in network studies during the last decade. Earthquakes are high on the list of those showing the most significant impacts on communication networks, and simultaneously, they are the least predictable events. This study uses the Probabilistic Seismic Hazard Analysis method to estimate the network element state after an earthquake. The approach considers a seismic source model and ground prediction equations to assess the intensity measure for each element according to its location. In the simulation, nodes fail according to the building's fragility curves. Similarly, links fail according to a failure rate depending on the intensity measure and the cable's characteristics. We use the source-terminal, and the diameter constrained reliability metrics. The approach goes beyond the graph representation of the network and incorporates the terrain characteristics and the component's robustness into the network performance analysis at an affordable computational cost. We study the method on a network in a seismic region with almost 9000 km of optical fiber. We observed that for source-terminal that are less than 500 km apart the improvements are marginals while for those that are more than 1000 km apart, reliability improves near a 30% in the enhanced designs. We also showed that these results depend heavily on the robustness/fragility of the infrastructure, showing that performance measures based only the network topology are not enough to evaluate new designs.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN WOS:000967453000001 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000967453000001 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1775  
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