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Embed. Comput. Syst."],"published-print":{"date-parts":[[2024,1,31]]},"abstract":"<jats:p>\n            This article presents a novel centrality-driven gateway designation framework for the improved real-time performance of low-power wireless sensor networks (WSNs) at system design time. We target time-synchronized channel hopping (TSCH) WSNs with centralized network management and multiple gateways with the objective of enhancing traffic schedulability\n            <jats:italic>by design<\/jats:italic>\n            . To this aim, we propose a novel network centrality metric termed\n            <jats:italic>minimal-overlap centrality<\/jats:italic>\n            that characterizes the overall number of path overlaps between all the active flows in the network when a given node is selected as gateway. The metric is used as a gateway designation criterion to elect as a gateway the node leading to the minimal number of overlaps. The method is then extended to multiple gateways with the aid of the unsupervised learning method of\n            <jats:italic>spectral clustering<\/jats:italic>\n            . Concretely, after a given number of clusters are identified, we use the new metric at each cluster to designate as cluster gateway the node with the least overall number of overlaps. Extensive simulations with random topologies under centralized\n            <jats:italic>earliest-deadline-first<\/jats:italic>\n            (EDF) scheduling and\n            <jats:italic>shortest-path<\/jats:italic>\n            routing suggest our approach is dominant over traditional centrality metrics from social network analysis, namely,\n            <jats:italic>eigenvector<\/jats:italic>\n            ,\n            <jats:italic>closeness<\/jats:italic>\n            ,\n            <jats:italic>betweenness<\/jats:italic>\n            , and\n            <jats:italic>degree<\/jats:italic>\n            . Notably, our approach reduces by up to 40% the worst-case end-to-end deadline misses achieved by classical centrality-driven gateway designation methods.\n          <\/jats:p>","DOI":"10.1145\/3610583","type":"journal-article","created":{"date-parts":[[2023,7,25]],"date-time":"2023-07-25T12:01:13Z","timestamp":1690286473000},"page":"1-17","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Minimal-Overlap Centrality for Multi-Gateway Designation in Real-Time TSCH Networks"],"prefix":"10.1145","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3307-8731","authenticated-orcid":false,"given":"Miguel Guti\u00e9rrez","family":"Gait\u00e1n","sequence":"first","affiliation":[{"name":"Universidad Andres Bello, Chile and CISTER, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9544-3028","authenticated-orcid":false,"given":"Lu\u00eds","family":"Almeida","sequence":"additional","affiliation":[{"name":"CISTER, Portugal and Faculdade de Engenharia, Universidade do Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2017-808X","authenticated-orcid":false,"given":"Pedro M.","family":"D\u2019orey","sequence":"additional","affiliation":[{"name":"CISTER, ISEP\/IPP, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7162-0560","authenticated-orcid":false,"given":"Pedro M.","family":"Santos","sequence":"additional","affiliation":[{"name":"CISTER, ISEP\/IPP, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3695-9315","authenticated-orcid":false,"given":"Thomas","family":"Watteyne","sequence":"additional","affiliation":[{"name":"Inria, France"}]}],"member":"320","published-online":{"date-parts":[[2024,1,10]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2015.2476915"},{"key":"e_1_3_2_3_2","first-page":"472","volume-title":"2022 IEEE International Conference on Pervasive Computing and Communications Workshops (PerCom Workshops)","author":"Akrivopoulos Orestis","year":"2022","unstructured":"Orestis Akrivopoulos, Dimitrios Amaxilatis, Nikolaos Tsironis, Dimitrios Karadimas, Nektarios Konstantopoulos, and Ioannis Panaretou. 2022. 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