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How to intelligently manage software\u2010defined data center networks to reduce network energy consumption and improve network performance is becoming an important research subject. In this paper, for the flows with deadline requirements, we study how to design the rate\u2010variable flow scheduling scheme to realize energy\u2010saving and minimize the mean completion time (MCT) of flows based on meeting the deadline requirement. The flow scheduling optimization problem can be modeled as a Markov decision process (MDP). To cope with a large solution space, we design a DDPG\u2010EEFS algorithm to find the optimal scheduling scheme for flows. The simulation result reveals that the DDPG\u2010EEFS algorithm only trains part of the states and gets a good energy\u2010saving effect and network performance. When the traffic intensity is small, the transmission time performance can be improved by sacrificing a little energy efficiency.<\/jats:p>","DOI":"10.1155\/2021\/6629852","type":"journal-article","created":{"date-parts":[[2021,6,28]],"date-time":"2021-06-28T22:50:42Z","timestamp":1624920642000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["DDPG\u2010Based Energy\u2010Efficient Flow Scheduling Algorithm in Software\u2010Defined Data Centers"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7004-1807","authenticated-orcid":false,"given":"Zan","family":"Yao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1213-5642","authenticated-orcid":false,"given":"Ying","family":"Wang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1896-3230","authenticated-orcid":false,"given":"Luoming","family":"Meng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7899-539X","authenticated-orcid":false,"given":"Xuesong","family":"Qiu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0402-5390","authenticated-orcid":false,"given":"Peng","family":"Yu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,6,28]]},"reference":[{"key":"e_1_2_10_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/JETCAS.2020.3000103"},{"key":"e_1_2_10_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2019.2948888"},{"key":"e_1_2_10_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMC.2016.2613529"},{"key":"e_1_2_10_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2018.2874954"},{"key":"e_1_2_10_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/twc.2020.3036408"},{"key":"e_1_2_10_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCC.2016.2525984"},{"key":"e_1_2_10_7_2","doi-asserted-by":"publisher","DOI":"10.1364\/JOCN.11.00A111"},{"key":"e_1_2_10_8_2","doi-asserted-by":"crossref","unstructured":"YaqiW. 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