A Novel Uplink Interference Coordination Scheme Using High Interference Indicator

At present, the 3rd Generation Partnership Project (3GPP) has agreed on using the high interference indicator (HII) for uplink inter-cell interference coordination (ICIC). HII indicates the potential uplink interference to other cells. In traditional HII based ICIC schemes, cells suffering from different inter-cell interference receive the same HII, it therefore causes ICIC to have a low efficiency. To overcome the shortcomings, a cell-specific and realistic HII is designed firstly. Second, two uplink coordination methods are selected and simplified. Integrating HII and the modified methods, a novel uplink ICIC scheme is proposed to improve the performance of ICIC for 4G Long Term Evolution (LTE) systems. Further, simulation results show that our scheme significantly improves the system´s spectral efficiency and reduces the blocking probability of user equipments (UEs) by more than 50% compared with existing ICIC schemes.