Beamforming Design for Cache-enabled Integrated Access and Backhaul Networks

Abstract

In this paper, we consider a cache-enabled integrated access and backhaul (IAB) network. We first derive the sum achievable data rate. Then, we formulate the sum achievable data rate maximization problem with respect to (w.r.t.) the beamforming designs of the macro base station (MBS) and small base stations (SBSs). By using successive convex approximation (SCA), we obtain a stationary point of the non-convex problem. Finally, by using numerical results, we show the proposed solution achieves a higher sum achievable data rate than the baseline schemes. Moreover, We show the impacts of the number of content types and Zipf exponent.