On Distributed and Self-Organized Inter-Cell Interference Mitigation for OFDMA Downlink in IMT-Advanced Radio Systems

This paper introduces a set of novel RRM philosophies: 1) the distributed Robin Hood philosophy, and 2) the self-organized proactive donation philosophy. By applying these philosophies with the soft-frequency reuse scheme, we proposed two novel inter-cell interference mitigation algorithms for the OFDMA based IMT advanced air interface: 1) distributed and dynamic power robbing (DDPR), and 2) self-organized and dynamic power shaping with proactive donation (SDPS/PD). Compared with the existing soft-frequency reuse schemes, our proposed algorithms are dynamic in the nature and more efficient and flexible. And for some scenarios, e.g. the user deployed wireless access points in a shopping center, the SDPS algorithm is the only possible interference mitigation solutions. Preliminary simulation results show that the DDPR algorithm can effectively reduce the average cell buffer size and average interference among the multi-cell environment.