期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2015
卷号：6
期号：6
页码：5181-5183
出版社：TechScience Publications
摘要：The day to day demand for mobile communication has been rapidly increasing in recent years. With the limited frequency spectrum, the problem of channel allocation becomes very important, i.e., how do we assign the calls to the available channels so that the interference is minimized while the demand is met? This problem is known to belong to a class of very difficult combinatorial optimization problems. In this situation, we apply the Dynamic frequency selection scheme to channel assignment problems. Interference-free solutions cannot be found for some of these problems; however, the approach is able to minimize the interference significantly. With the limited frequency spectrum, the channel assignment problem (CAP) i.e., to assign the calls to the available channels so that the interference is minimized while the demand is met, has become increasingly important. The Channel Assignment Problem is an NP-complete problem to assign a minimum number of channels under certain constraints to requested calls in a cellular radio system.The dynamic channel assignment (DCA) in mobile communications systems using Dynamic frequency selections among the available free frequencies (DFS) is investigated in this research.
