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Full-duplex self-backhauling is promising to provide cost-effective andflexible backhaul connectivity for ultra-dense wireless networks, but alsoposes a great challenge to resource management between the access and backhaullinks. In this paper, we propose a user-centric joint access-backhaultransmission framework for full-duplex self-backhauled wireless networks. Inthe access link, user-centric clustering is adopted so that each user iscooperatively served by multiple small base stations (SBSs). In the backhaullink, user-centric multicast transmission is proposed so that each user'smessage is treated as a common message and multicast to its serving SBScluster. We first formulate an optimization problem to maximize the networkweighted sum rate through joint access-backhaul beamforming and SBS clusteringwhen global channel state information (CSI) is available. This problem isefficiently solved via the successive lower-bound maximization approach with anovel approximate objective function and the iterative link removal technique.We then extend the study to the stochastic joint access-backhaul beamformingoptimization with partial CSI. Simulation results demonstrate the effectivenessof the proposed algorithms for both full CSI and partial CSI scenarios. Theyalso show that the transmission design with partial CSI can greatly reduce theCSI overhead with little performance degradation.

User-Centric Joint Access-Backhaul Design for Full-Duplex Self-Backhauled Wireless Networks