Dynamic TDD enhancement through distributed interference coordination

Abstract

Dynamic TDD is promising to improve the performance of cellular networks since the UL and DL configurations could be modified to match the instantaneous traffic. However, for the neighbor cells of opposite transmission directions, the base station-to-base station interference from the DL cell greatly limits the performance of UL cell. In this work, we first provide a detailed model that abstracts the practical system and analyze the interference of the network by leveraging tools from point process theory. Then, based on the conclusions from theoretical analysis, we propose several distributed interference coordination schemes to mitigate the interference for dynamic TDD. Simulation results show that subframe-dependent OI with interference source is effective to improve the performance of the network, and that interference type information does not help much for subframe-dependent OI while eNB-eNB measurement can efficiently improve the performance of subframe-specific OI.