@ARTICLE{9046815,  author={S. {Bera} and S. {Misra} and N. {Saha}},  journal={IEEE Transactions on Communications},   title={Traffic-Aware Dynamic Controller Assignment in SDN},   year={2020},  volume={68},  number={7},  pages={4375-4382},  doi={10.1109/TCOMM.2020.2983168}}