An Interference Management Scheme using Partial CSI for Partially Connected Cellular Networks

We consider a partially connected cellular network where amplify-and-forward relays are deployed in order to help the cell-edge users to suppress the inter-cell interferences in the downlink transmission. The one-way half-duplex relaying protocol is employed. An interference management scheme which achieves interference-free transmissions in the entire network using only partial channel state information is proposed. The feasibility conditions for the proposed scheme are discussed. Furthermore, the problem of how to maximize the achieved sum rate using the considered partial channel state information is addressed. Both a sum power constraint and individual power constraints are considered. The simulation results show that the proposed scheme is able to achieve an outstanding performance, especially if the network is sparse.