MultiHop Dynamic Channel Assignment to Optimize Cellular Networks Based on Dynamic Frequency Selections
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 the users 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, the authors 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.