On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO Downlink
<|reference_start|>On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO Downlink: We investigate the non-orthogonal coexistence between the ultra-reliable low-latency communication (URLLC) and the enhanced mobile broadband (eMBB) in the downlink of a cell-free massive multiple-input multiple-output (MIMO) system. We provide a unified information-theoretic framework that combines a finite-blocklength analysis of the URLLC error probability based on the use of mismatched decoding with an infinite-blocklength analysis of the eMBB spectral efficiency. Superposition coding and three levels of puncturing are considered as alternative downlink coexistence strategies to cope with the inter-service interference and the URLLC random activation pattern, under the assumption of imperfect pilot-based channel state information acquisition at the access points and statistical channel knowledge at the users. Numerical results shed light into the trade-off between eMBB and URLLC performances considering different precoding and power control strategies.<|reference_end|>
@article{interdonato2024on,
    title={On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO
  Downlink},
    author={Giovanni Interdonato, Stefano Buzzi},
    journal={arXiv preprint arXiv:2405.07585},
    year={2024},
    archivePrefix={arXiv},
    eprint={2405.07585},
    primaryClass={cs.IT eess.SP math.IT}
}