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The sensor nodes in WSN generate large sensing data which is disseminated to intelligent servers using multiple wireless networks. This large data is prone to attacks from malicious nodes which become part of the network, and it is difficult to find these adversaries. The work in this paper presents a mechanism to detect adversaries for the IEEE 802.15.4 standard which is a central medium access protocol used in WSN\u2010based IoT applications. The collisions and exhaustion attacks are detected based on a soft decision\u2010based algorithm. In case the QoS of the network is compromised due to large data traffic, the proposed protocol adaptively varies the duty cycle of the IEEE 802.15.4. Simulation results show that the proposed intrusion detection and adaptive duty cycle algorithm improves the energy efficiency of a WSN with a reduced network delay.<\/jats:p>","DOI":"10.1155\/2021\/9962697","type":"journal-article","created":{"date-parts":[[2021,6,18]],"date-time":"2021-06-18T17:50:09Z","timestamp":1624038609000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["A Novel QoS\u2010Oriented Intrusion Detection Mechanism for IoT Applications"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9942-2526","authenticated-orcid":false,"given":"Abdulfattah","family":"Noorwali","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7771-9115","authenticated-orcid":false,"given":"Ahmad Naseem","family":"Alvi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2409-7172","authenticated-orcid":false,"given":"Mohammad Zubair","family":"Khan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5816-097X","authenticated-orcid":false,"given":"Muhammad Awais","family":"Javed","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2133-0757","authenticated-orcid":false,"given":"Wadii","family":"Boulila","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Priyadarshini A.","family":"Pattanaik","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,6,18]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.3390\/s20071971"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSEN.2019.2908583"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.comcom.2020.12.023"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2019.2955544"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1155\/2021\/6664324"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1155\/2021\/6654427"},{"key":"e_1_2_9_7_2","first-page":"787","article-title":"Energy efficiency in Internet of Things: an overview","volume":"63","author":"Zhang W.","year":"2020","journal-title":"Computers, Materials & Continua"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-com.2019.0977"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/ACCESS.2017.2710304"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/JSEN.2016.2646218"},{"key":"e_1_2_9_11_2","doi-asserted-by":"publisher","DOI":"10.1504\/IJSSC.2017.084120"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.1109\/MITS.2018.2806636"},{"key":"e_1_2_9_13_2","doi-asserted-by":"publisher","DOI":"10.32604\/cmc.2020.013910"},{"key":"e_1_2_9_14_2","doi-asserted-by":"publisher","DOI":"10.1109\/MCE.2019.2953737"},{"key":"e_1_2_9_15_2","doi-asserted-by":"publisher","DOI":"10.32604\/cmc.2020.013210"},{"key":"e_1_2_9_16_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2020.2970501"},{"key":"e_1_2_9_17_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2019.2926365"},{"key":"e_1_2_9_18_2","doi-asserted-by":"crossref","unstructured":"MittalM.andVijayalS. 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