On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO Downlink
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| Format: | Preprint |
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2024
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| _version_ | 1866909200920084480 |
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| author | Interdonato, Giovanni Buzzi, Stefano |
| author_facet | Interdonato, Giovanni Buzzi, Stefano |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07585 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO Downlink Interdonato, Giovanni Buzzi, Stefano Information Theory Signal Processing 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. |
| title | On the Coexistence of eMBB and URLLC in the Cell-Free Massive MIMO Downlink |
| topic | Information Theory Signal Processing |
| url | https://arxiv.org/abs/2405.07585 |