Abstract For OFDM based system with Single-Frequency Networking (SFN), ICI (inter-cell interference), especially uplink ICI, becomes a bottleneck to improve system performance. Since the conventional interference management scheme with OI (overload indicator) can not show the instantaneous ICI, this paper proposes a method to reduce ICI by utilizing channel reciprocity of TD-LTE system. In the proposed scheme, UE shall make a decision whether to reduce its power or not after predicting the instantaneous ICI level according to the scheduling results. The system simulation results show that the proposed scheme can reduce the uplink ICI effectively and improve the system performance such as system spectrum efficiency, 10% user throughput, 50% user throughput, packet drop rate etc. significantly while keep 5% cell edge user throughput loss less than 5%. For example, the proposed scheme improved system spectrum efficiency about 50% and 50% user throughput gain is larger than 140%. Meanwhile, the proposed scheme controls the system ICI level and variance effectively. The mean system ICI level and variance are reduced by 4.5dB and 18dB respectively. The proposed scheme can be joint implemented with those existing ICI mitigation methods such as (soft) frequency reuse, power control etc. to further improve the system performance.

A+Novel+Uplink+Inter-Cell+Interference+Management+Method+for+TD-LTE+System.pdf