{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T22:43:10Z","timestamp":1761864190113,"version":"build-2065373602"},"reference-count":33,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2020,10,14]],"date-time":"2020-10-14T00:00:00Z","timestamp":1602633600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministerio de Econom\u00eda y Competitividad of the Spanish Government","award":["PID2019-108713RB-C51"],"award-info":[{"award-number":["PID2019-108713RB-C51"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Future Internet"],"abstract":"<jats:p>The increasing worldwide energy demand, the CO2 emissions generated due to the production and use of energy, climate change, and the depletion of natural resources are important concerns that require new solutions for energy generation and management. In order to ensure energy sustainability, measures, including the use of renewable energy sources, the deployment of adaptive energy consumption schemes, and consumer participation, are currently envisioned as feasible alternatives. Accordingly, this paper presents the requirements and algorithmic solutions for efficient management of energy consumption, which aims to optimize the use of available energy, whether or not it is 100% renewable, by minimizing the waste of energy. The proposal works within a Demand-Response environment, uses Network Functions Virtualization as an enabling technology, and leverages the massive connectivity of the Internet of Things provided by modern communications technologies. The energy consumption optimization problem is formulated as an Integer Linear Program. It is optimally solved while using a brute-force search strategy, defined as OptTs, to detect all concerns that are related to the problem. Given the NP-hard nature of the problem and the non-polynomial complexity of OptTs, some heuristic solutions are analyzed. Subsequently, a heuristic strategy, described as FastTs based on a pre-partitioning method, is implemented. The simulation results validate our proposed energy management solution. Exact and heuristic strategies, when deployed in the Network Functions Virtualization domain, demonstrate improvements in the way that energy is consumed, thereby offering an increase in service processing. The evaluation results also show that FastTs produces high-quality solutions that are close to those of OptTs while executing 230\u00d7\u20135000\u00d7 faster.<\/jats:p>","DOI":"10.3390\/fi12100171","type":"journal-article","created":{"date-parts":[[2020,10,14]],"date-time":"2020-10-14T08:59:22Z","timestamp":1602665962000},"page":"171","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["NFV-Enabled Efficient Renewable and Non-Renewable Energy Management: Requirements and Algorithms"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8655-325X","authenticated-orcid":false,"given":"Christian","family":"Tipantu\u00f1a","sequence":"first","affiliation":[{"name":"Department of Network Engineering, Universitat Polit\u00e8cnica de Catalunya (UPC), Jordi Girona 1-3, E-08034 Barcelona, Spain"},{"name":"Department of Electronics, Telecommunications and Information Networks, Escuela Polit\u00e9cnica Nacional, Ladr\u00f3n de Guevara, E11-253 Quito, Ecuador"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7888-3603","authenticated-orcid":false,"given":"Xavier","family":"Hesselbach","sequence":"additional","affiliation":[{"name":"Department of Network Engineering, Universitat Polit\u00e8cnica de Catalunya (UPC), Jordi Girona 1-3, E-08034 Barcelona, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2020,10,14]]},"reference":[{"key":"ref_1","unstructured":"Global e-Sustainability Initiative (2015). SMARTer2030, ICT Solutions for 21st Century Challenges, GeSI, Accenture Strategy."},{"key":"ref_2","unstructured":"Lima, J.M. (2017). Data centres of the World Will Consume 1\/5 of Earth\u2019s Power by 2025, Euromoney Institutional Investor PLC. Technical Report."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"1002","DOI":"10.1109\/TIE.2006.878356","article-title":"Power-electronic systems for the grid integration of renewable energy sources: A survey","volume":"53","author":"Carrasco","year":"2006","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1109\/TSG.2010.2050156","article-title":"Demand response and distribution grid operations: Opportunities and challenges","volume":"1","author":"Medina","year":"2010","journal-title":"IEEE Trans. Smart Grid"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1109\/OJCOMS.2020.2984982","article-title":"NFV\/SDN Enabled Architecture for Efficient Adaptive Management of Renewable and Non-renewable Energy","volume":"1","author":"Hesselbach","year":"2020","journal-title":"IEEE Open J. Commun. Soc."},{"key":"ref_6","unstructured":"ETSI (2012). Network Functions Virtualisation, An Introduction, Benefits, Enablers, Challenges & Call for Action. ETSI White Pap., 1\u201316."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Shakerighadi, B., Anvari-Moghaddam, A., Vasquez, J.C., and Guerrero, J.M. (2018). Internet of things for modern energy systems: State-of-the-art, challenges, and open issues. Energies, 11.","DOI":"10.3390\/en11051252"},{"key":"ref_8","first-page":"1","article-title":"Cisco visual networking index: Forecast and trends, 2017\u20132022","volume":"1","author":"Cisco","year":"2018","journal-title":"White Pap."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"212","DOI":"10.1016\/j.apenergy.2016.06.052","article-title":"Energy internet: The business perspective","volume":"178","author":"Zhou","year":"2016","journal-title":"Appl. Energy"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"76","DOI":"10.1016\/j.icte.2017.05.006","article-title":"Energy informatics: Fundamentals and standardization","volume":"3","author":"Huang","year":"2017","journal-title":"ICT Express"},{"key":"ref_11","first-page":"1","article-title":"Demand Response Opportunities and Enabling Technologies for Data Centers: Findings from Field Studies","volume":"LBNL-5763E","author":"Ghatikar","year":"2012","journal-title":"Lawrence Berkeley Natl. Lab."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"607","DOI":"10.1016\/j.apenergy.2015.11.107","article-title":"An IoT-based energy-management platform for industrial facilities","volume":"164","author":"Wei","year":"2016","journal-title":"Appl. Energy"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"262","DOI":"10.1016\/j.enbuild.2017.07.089","article-title":"Intelligent homes\u2019 technologies to optimize the energy performance for the net zero energy home","volume":"153","author":"AlFaris","year":"2017","journal-title":"Energy Build."},{"key":"ref_14","unstructured":"Allience, O. (2013). OpenADR 2.0 Profile Specification B Profile, OpenADR Alliance. Technical Report."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"3453","DOI":"10.1109\/TSG.2016.2632526","article-title":"Making Data Centres Fit for Demand Response: Introducing GreenSDA and GreenSLA Contracts","volume":"9","author":"Basmadjian","year":"2017","journal-title":"IEEE Trans. Smart Grid"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"449","DOI":"10.1007\/s10922-016-9380-1","article-title":"Constructing dependable smart grid networks using network functions virtualization","volume":"24","author":"Niedermeier","year":"2016","journal-title":"J. Netw. Syst. Manag."},{"key":"ref_17","unstructured":"Mijumbi, R. (2015). On the energy efficiency prospects of network function virtualization. arXiv."},{"key":"ref_18","unstructured":"GreenTouch. G.W.A.T.T. (Global What if Analyzer of NeTwork Energy ConsumpTion) (2020, September 01). OnlineWeb Tool to Provide an End-to-End View of the GreenTouch Portfolio of Technologies and Solutions on Network Energy Consumption. Available online: http:\/\/alu-greentouch-dev.appspot.com\/intro\/1."},{"key":"ref_19","doi-asserted-by":"crossref","unstructured":"Li, X., Ferdous, R., Chiasserini, C.F., Casetti, C.E., Moscatelli, F., Landi, G., Casellas, R., Sakaguchi, K., Chundrigar, S.B., and Vilalta, R. (2017, January 21\u201325). Novel Resource and Energy Management for 5G integrated backhaul\/fronthaul (5G-Crosshaul). Proceedings of the 2017 IEEE International Conference on Communications Workshops (ICC Workshops), Paris, France.","DOI":"10.1109\/ICCW.2017.7962753"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"44939","DOI":"10.1109\/ACCESS.2019.2907798","article-title":"Optimized energy aware 5G network function virtualization","volume":"7","author":"Lawey","year":"2019","journal-title":"IEEE Access"},{"key":"ref_21","first-page":"4734821","article-title":"An NFV-Based Energy Scheduling Algorithm for a 5G Enabled Fleet of Programmable Unmanned Aerial Vehicles","volume":"2019","author":"Hesselbach","year":"2019","journal-title":"Wirel. Commun. Mob. Comput."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Tsoukalas, L., and Gao, R. (2008, January 6\u20139). From smart grids to an energy internet: Assumptions, architectures and requirements. Proceedings of the 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies, Nanjing, China.","DOI":"10.1109\/DRPT.2008.4523385"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2424","DOI":"10.1109\/TIE.2014.2361486","article-title":"A review of architectures and concepts for intelligence in future electric energy systems","volume":"62","author":"Strasser","year":"2014","journal-title":"IEEE Trans. Ind. Electron."},{"key":"ref_24","unstructured":"ETSI (2015). Network Functions Virtualisation (NFV); Ecosystem; Report on SDN Usage in NFV Architectural Framework. ETSI Netw. Funct. Virtualisat. Ind. Specif. Group GS NFV-EVE, 5, V1."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Keles, C., Kaygusuz, A., and Alagoz, B.B. (2016, January 20\u201321). Multi-source energy mixing by time rate multiple PWM for microgrids. Proceedings of the 4th International Istanbul Smart Grid Congress and Fair, ICSG 2016, Istanbul, Turkey.","DOI":"10.1109\/SGCF.2016.7492416"},{"key":"ref_26","unstructured":"Garey, M.R., and Johnson, D.S. (1979). Computers and Intractability: A Guide to the Theory of NP-Completeness, WH Free. Co.. [1st ed.]."},{"key":"ref_27","unstructured":"Pisinger, D. (1995). Algorithms for Knapsack Problems, Dept. of Computer Science, University of Copenhagen."},{"key":"ref_28","unstructured":"Vazirani, V.V. (2013). Approximation Algorithms, Springer Science & Business Media."},{"key":"ref_29","unstructured":"Cormen, T.H., Leiserson, C.E., Rivest, R.L., and Stein, C. (2009). Introduction to Algorithms, MIT Press."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1109\/TSMCA.2005.859094","article-title":"A parallel hypercube algorithm for discrete resource allocation problems","volume":"36","author":"Shao","year":"2006","journal-title":"IEEE Trans. Syst. Man Cybern. Part Syst. Hum."},{"key":"ref_31","unstructured":"Tomassilli, A., Huin, N., Giroire, F., and Jaumard, B. (2016). Energy-Efficient Service Chains with Network Function Virtualization, HAL."},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Kim, S., Han, Y., and Park, S. (2016, January 12\u201316). An energy-aware service function chaining and reconfiguration algorithm in NFV. Proceedings of the 2016 IEEE 1st International Workshops on Foundations and Applications of Self* Systems (FAS* W), Augsburg, Germany.","DOI":"10.1109\/FAS-W.2016.24"},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Ayan, O., and Turkay, B. (2018, January 3\u20136). Energy Management Algorithm for Peak Demand Reduction. Proceedings of the 2018 20th International Symposium on Electrical Apparatus and Technologies (SIELA), Bourgas, Bulgaria.","DOI":"10.1109\/SIELA.2018.8447088"}],"container-title":["Future Internet"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1999-5903\/12\/10\/171\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T10:20:57Z","timestamp":1760178057000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1999-5903\/12\/10\/171"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,10,14]]},"references-count":33,"journal-issue":{"issue":"10","published-online":{"date-parts":[[2020,10]]}},"alternative-id":["fi12100171"],"URL":"https:\/\/doi.org\/10.3390\/fi12100171","relation":{},"ISSN":["1999-5903"],"issn-type":[{"type":"electronic","value":"1999-5903"}],"subject":[],"published":{"date-parts":[[2020,10,14]]}}}