Dual-Segment Clustering Strategy for Hierarchical Federated Learning in Heterogeneous Wireless Environments. - Pengcheng Sun; Erwu Liu; Wei Ni 001; Kanglei Yu; Xinyu Qu; Rui Wang 001; Yanlong Bi; Chuanchun Zhang; Abbas Jamalipour (IEEE Wirel. Commun. Lett., 2025)