Cluster-based dynamic DL/UL reconfiguration method in centralized RAN TDD with trellis exploration algorithm

In this paper, we propose and evaluate a novel cluster-based dynamic downlink/uplink reconfiguration method in centralized TDD networks with dense deployment of remote radio units. All cells of interest are first divided into disjoint cell clusters. Cells that are highly interfered with each other are grouped into the same cluster. The central control units of the network optimize and reconfigure the downlink/uplink allocations on the basis of cell cluster. The optimization-reconfiguration aims at maximizing the overall system throughput and adapting the traffic variations. In addition, we investigate the use of the trellis exploration algorithm to facilitate the optimization-reconfiguration process with low complexity. System level simulations validate the effectiveness of our proposed approach.