User Association for Load Balance in Heterogeneous Networks with Limited CSI Feedback

Conventional user association (UA) scheme based on max-signal-to-interference-plus-noise-ratio (max-SINR) criterion results in a severe load imbalance problem in heterogeneous networks (HetNets), leading to substantial performance loss. The state-of-the-art solutions to load imbalance mostly formulate the UA problem as a complicated global optimization that requires full channel state information ...