131197 20240206154529.0 doi 10.1109/ACCESS.2021.3132427 sideral 126926 ART-2021-126926 eng Ortin Gracia, J. (orcid)0000-0001-9052-9554 On Optimizing Network Function Placement for Multicast Group Call Service Provision in LTE IOPS Networks 2021 The adoption of commercial wireless technologies such as 4G/5G in public safety networks allows for new broadband services that could not be offered in this type of networks. Nevertheless, public safety networks are mission-critical systems that require the introduction of specific services in commercial wireless networks before this adoption. For instance, public safety networks require push-to-talk group communications or the possibility of operating in isolated mode, named by 3GPP the Isolated E-UTRAN Operation for Public Safety (IOPS). These requirements pose specific challenges that must be addressed, such as the placement of a local Evolved Packet Core (EPC) when a set of evolved Node B (eNB) must work in IOPS mode. In this paper, we analyze the implications of push-to-talk group communications and multicast in the local EPC placement problem for IOPS networks and propose an optimization algorithm that finds the best eNB where the local EPC should be co-located. Given the complexity of the problem, we also propose a heuristic algorithm to determine the optimal placement of the local EPC. Simulation results show the ability of our approach to adapt to different types of traffic with heterogeneous spatial distributions. © 2013 IEEE. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T31-20R info:eu-repo/grantAgreement/ES/MICINN/RTI2018-099063-B-100 info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.476 2021 COMPUTER SCIENCE, INFORMATION SYSTEMS 79 / 163 = 0.485 2021 Q2 T2 TELECOMMUNICATIONS 43 / 92 = 0.467 2021 Q2 T2 ENGINEERING, ELECTRICAL & ELECTRONIC 105 / 274 = 0.383 2021 Q2 T2 0.927 2021 Engineering (miscellaneous) 2021 Q1 Computer Science (miscellaneous) 2021 Q1 6.7 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Gallego Martínez, J. Universidad de Zaragoza (orcid)0000-0002-8682-745X Hernandez Solana A. Universidad de Zaragoza (orcid)0000-0002-0299-0859 Canales M. Universidad de Zaragoza (orcid)0000-0002-8298-4300 5008 560 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Ingeniería Telemática 9 (2021), 160897-160916 IEEE Access IEEE Access 2169-3536 4115157 http://zaguan.unizar.es/record/131197/files/texto_completo.pdf Versión publicada 2724364 http://zaguan.unizar.es/record/131197/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:131197 articulos driver 2024-02-06-14:48:54 ARTICLE