8th Lincs Scientific Highlight - LINCS Annual Workshop with its Scientific Committee

“GNN-based Fast Power Allocation in Cell Free Massive MIMO networks”, by Shashwat Mishra (NBL).
Beyond 5G wireless technology Cell-Free Massive MIMO (CFmMIMO) downlink relies on carefully designed pre-coders and power control to attain uniformly high rate coverage. Many such power control problems can be calculated via second order cone programming (SOCP). In practice, several order of magnitude faster numerical procedure is required because power control has to be rapidly updated to adapt to changing channel conditions. We propose a Graph Neural Network (GNN) based solution to replace SOCP. We construct a graph representation of the problem that properly captures the dominant dependence relationship between access points (APs) and user equipment (UEs). Simulation results show the superiority of our approach in terms of computational complexity, scalability and generalizability for different system sizes and deployment scenarios.