Dynamic Frequency Planning Versus Frequency Reuse Schemes in OFDMA Networks

In order to avoid inter-cell interference, OFDMA networks are flexible in terms of radio resource management techniques, supporting different frequency reuse schemes (FRSs), which in turn, may decrease inter-cell interference and increase network performance. However, because most of them are based on fix patterns, these FRSs cannot cope with the uneven distribution and dynamic behavior of the traffic throughout the day. This work introduces a novel approach to the frequency assignment problem called dynamic frequency planning (DFP) tailored to OFDMA networks. The proposed approach dynamically adapts the radio frequency parameters to the environment taking the user and channel conditions into account. Moreover, a variant of DFP, called vertical DFP, based on the fractional frequency reuse schemes (FFRSs) concept is proposed. In comparison to the traditional FRSs, these techniques notably mitigate inter-cell interference and enhance network performance.