“…However, their proposed taxonomy is not comprehensive enough and is insufficient in the current literature. We propose a comprehensive taxonomy of AND techniques according to the used methodology—ML techniques (Wang et al ., 2011; Huynh et al ., 2013; Imran et al ., 2013; Tran et al ., 2014; Han et al ., 2015; Seol et al ., 2016) that have been further subdivided into three categories, and non-ML techniques (Fan et al ., 2011; Wang et al ., 2011; Tang et al ., 2012; Shin et al ., 2014) into two subcategories. Moreover, these all surveys reviewed the techniques up to the year 2012.…”