QoS-Based Proportional Fair Allocation Algorithm for OFDMA Wireless Cellular Systems

In this paper, a resource allocation algorithm which provides Quality of Service (QoS) guarantees to users, in a cellular Orthogonal Frequency Division Multiple Access (OFDMA) network is proposed. The algorithm is a modified proportional fair (PF) scheduling algorithm and it comprises two phases. In the first phase, users´ minimum data rate requirements are met and in the second phase, remaining resources are allocated according to PF scheduling algorithm. It is a cell-level algorithm and its main advantages are the low implementation complexity and the capacity of maintaining higher ratio of QoS satisfied users than other reference schemes. Via simulation we show that our scheme outperforms other reference resource allocation schemes.