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By means of the emerging technique of dynamic Time Division Duplex (TDD), theswitching point between uplink and downlink transmissions can be optimizedacross a multi-cell system in order to reduce the impact of inter-cellinterference. It has been recently recognized that optimizing also the order inwhich uplink and downlink transmissions, or more generally the two directionsof a two-way link, are scheduled can lead to significant benefits in terms ofinterference reduction. In this work, the optimization of bi-directionalscheduling is investigated in conjunction with the design of linear precodingand equalization for a general multi-link MIMO two-way system. A simplealgorithm is proposed that performs the joint optimization of the ordering ofthe transmissions in the two directions of the two-way links and of the lineartransceivers, with the aim of minimizing the interference leakage power.Numerical results demonstrate the effectiveness of the proposed strategy.

Joint Interference Alignment and Bi-Directional Scheduling for MIMO Two-Way Multi-Link Networks