Abstract: A low complexity resource management scheme based on generalized processor sharing (GPS) scheduling for the downlink of OFDM systems is proposed. By using the MAC-PHY cross-layer design method, the proposed scheme gives a good tradeoff between channel capacities and user fairness. It can achieve fair bandwidth sharing among users by GPS scheduling in the MAC layer, while integrating sub-optimal subcarrier allocation, equal power distribution and adaptive modulation to exploit the available channel capacities in the PHY layer. Furthermore, we propose a weight compensation method to improve fairness of GPS bandwith sharing. Numerical results demonstrate that the scheme offers performance comparable to an existing algorithm, with lower computational complexity.

Key words: OFDM, resource management, generalized processor sharing, cross-layer design, weight compensation.