Mengmeng Ren, Long Yang, Yuchen Zhou, Lu Lv, Jian Chen, Pei Xiao, Cicek Cavdar and Rahim Tafazolli, Resource allocation in cell-free MEC networks: A hierarchical MADRL-based algorithm[J]. IEEE Transactions on Cognitive Communications and Networking, major revision. /yuchenzhou/files/68e778d3637e6.tar