These are the codes for the following paper Minh-Duong Nguyen, Sang-Min Lee, Quoc-Viet Pham, Dinh Thai Hoang, Diep Nguyen, Won-Joo Hwang "HCFL: A High Compression Approach for Communication-Efficient Federated Learning in Very Large Scale IoT Networks" IEEE TMC, Early Access. Anyone who uses this code please refer to the following reference: @ARTICLE{9829327, author={Nguyen, Minh-Duong and Lee, Sang-Min and Pham, Quoc-Viet and Hoang, Dinh Thai and Nguyen, Diep N. and Hwang, Won-Joo}, journal={IEEE Transactions on Mobile Computing}, title={HCFL: A High Compression Approach for Communication-Efficient Federated Learning in Very Large Scale IoT Networks}, year={2022}, month={Jul.} volume={}, number={}, pages={1-13}, doi={10.1109/TMC.2022.3190510}}