WSEE Optimization Using Asynchronous ADMM for Massive MIMO Two-Way Relaying

We decentrally optimize the weighted sum energy efficiency (WSEE) of a multi-pair two-way half-duplex massive multi-input multi-output relaying. We use asynchronous alternating direction method of multipliers (aADMM) optimization approach, which is robust to node delays and failures. We analytically prove its convergence under a bounded delay assumption. We numerically show that the proposed aADMM approach yields similar WSEE and improved computational efficiency than its synchronous counterpart.