Mitigation of inter-cell interference in the WiMAX system

Abstract

The Worldwide Interoperability for Microwave Access (WiMAX) can provide wireless services at high rates even in high mobility, but it can suffer from serious inter-cell interference (ICI) near the cell boundary. To mitigate the ICI problem in the downlink of mobile-WiMAX, we consider combined use of interference avoidance and cancellation techniques in addition to inter-sector coordination, maximizing the user capacity in a seamless manner. To make the proposed scheme realizable, we maximize the geometry capacity. Simulation results show that the proposed scheme can improve the capacity of users near the cell boundary over the conventional schemes and provide flexibility in resource allocation.