Large System Resource Allocation in Multicell OFDMA Communication Systems: A Variational Analysis Approach

Resource (power and bandwidth) allocation is an important issue in orthogonal frequency division multiple access (OFDMA) systems. For multi-cell systems, the interference across different cells makes the optimization of resource allocation difficult. Large system analysis is applied for multi-cell OFDMA systems with the fairness constraint of equal grade of service (EGOS). An interference function is defined to model the intercell interference. Variational analysis is used to compute the optimal profile of transmit power and bandwidth. The optimal resource allocation is then computed using numerical simulations.