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In order to achieve objectives such as huge amount of connection and wide area coverage within NB\u2010IoT, the problem of network congestion generated by random access of numerous devices should be solved. In this paper, we first introduce the background of NB\u2010IoT and investigate the research on random access optimization algorithm. Then we summarize relevant features of NB\u2010IoT uplink and narrowband physical random access channel and design random access with differentiated barring (RADB), which can improve the insufficiency of traditional dynamic access class barring method. At last, the algorithms proposed in this paper are realized with established NB\u2010IoT model using OPNET Modeler platform, and simulations are conducted. The simulation results show that RADB is able to effectively solve preamble request conflict generated by random access of numerous devices and preferentially provide efficient and reliable random access for latency\u2010sensitive devices.<\/jats:p>","DOI":"10.1155\/2018\/6210408","type":"journal-article","created":{"date-parts":[[2018,1,10]],"date-time":"2018-01-10T23:42:27Z","timestamp":1515627747000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["RADB: Random Access with Differentiated Barring for Latency\u2010Constrained Applications in NB\u2010IoT Network"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1580-9120","authenticated-orcid":false,"given":"Yiming","family":"Miao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuanwen","family":"Tian","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6698-9278","authenticated-orcid":false,"given":"Jingjing","family":"Cheng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5906-9422","authenticated-orcid":false,"given":"M. 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