Power Minimization of Downlink Spectrum Slicing for eMBB and URLLC Users

Saggese, Fabio; Moretti, Marco; Popovski, Petar

doi:10.1109/twc.2022.3189396

Cited by 21 publications

(15 citation statements)

References 27 publications

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“…The coexistence between eMBB and URLLC is of most interest [14]- [18], and is mainly handled with three alternative techniques, herein listed in descending order of complexity:…”

Section: A Related Workmentioning

confidence: 99%

“…Recently, [17] proposed an approach to improve the supported loads for URLLC in the uplink, for both H-OMA and H-NOMA in presence of eMBB traffic, showing the superiority of H-NOMA in ensuring the reliability requirements of both the services. A similar analysis but for the downlink is conducted in [18], [20] where optimal resource allocation strategies and H-NOMA are combined to satisfy the eMBB and URLLC QoS constraints, under the assumption of perfect eMBB CSI and statistical URLLC CSI knowledge. The information-theoretic framework used by the aforementioned works to characterize the performance achieved by eMBB and URLLC users cannot be applied to massive MIMO scenarios, for different reasons.…”

Section: A Related Workmentioning

confidence: 99%

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On the Coexistence of eMBB and URLLC in Multi-Cell Massive MIMO

Interdonato

Buzzi

D’Andrea

et al. 2023

IEEE Open J. Commun. Soc.

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The non-orthogonal coexistence between the enhanced mobile broadband (eMBB) and the ultra-reliable low-latency communication (URLLC) in the downlink of a multi-cell massive MIMO system is rigorously analyzed in this work. We provide a unified information-theoretic framework blending an infinite-blocklength analysis of the eMBB spectral efficiency (SE) in the ergodic regime with a finiteblocklength analysis of the URLLC error probability relying on the use of mismatched decoding, and of the so-called saddlepoint approximation. Puncturing (PUNC) and superposition coding (SPC) are considered as alternative downlink coexistence strategies to deal with the inter-service interference, under the assumption of only statistical channel state information (CSI) knowledge at the users. eMBB and URLLC performances are then evaluated over different precoding techniques and power control schemes, by accounting for imperfect CSI knowledge at the base stations, pilot-based estimation overhead, pilot contamination, spatially correlated channels, the structure of the radio frame, and the characteristics of the URLLC activation pattern. Simulation results reveal that SPC is, in many operating regimes, superior to PUNC in providing higher SE for the eMBB yet achieving the target reliability for the URLLC with high probability. Moreover, PUNC might cause eMBB service outage in presence of high URLLC traffic loads. However, PUNC turns to be necessary to preserve the URLLC performance in scenarios where the multi-user interference cannot be satisfactorily alleviated.

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“…The coexistence between eMBB and URLLC is of most interest [14]- [18], and is mainly handled with three alternative techniques, herein listed in descending order of complexity:…”

Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

On the Coexistence of eMBB and URLLC in Multi-Cell Massive MIMO

Interdonato

Buzzi

D’Andrea

et al. 2023

IEEE Open J. Commun. Soc.

View full text Add to dashboard Cite

show abstract

“…Recently, [17] proposed an approach to improve the supported loads for URLLC in the uplink, for both H-OMA and H-NOMA in presence of eMBB traffic, showing the superiority of H-NOMA in ensuring the reliability requirements of both the services. A similar analysis but for the downlink is conducted in [18], [19] where optimal resource allocation strategies and H-NOMA are combined to satisfy the eMBB and URLLC QoS constraints, under the assumption of perfect eMBB CSI and statistical URLLC CSI knowledge.…”

Section: A Related Workmentioning

confidence: 99%

“…In addition, outage capacity analyses do not capture the effects of the CSI acquisition overhead when pilots are used to estimate the uplink channel. As an alternative, finite-blocklength analyses have been proposed for URLLC in conventional cellular networks [18], [19], co-located massive MIMO networks [20], [21] and cell-free massive MIMO networks [22], and rely on the information-theoretic bounds and tools developed in [23], e.g., the well known normal approximation. However, the work in [8] proved that the normal approximation is not accurate in the region of low error probabilities of interest in URLLC (< 10 −4 ), especially as the number of antennas at the BS increases, and in presence of imperfect CSI.…”

Section: A Related Workmentioning

confidence: 99%

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On the Coexistence of eMBB and URLLC in Multi-cell Massive MIMO

Interdonato¹,

Buzzi²,

D’Andrea³

et al. 2023

Preprint

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The non-orthogonal coexistence between the enhanced mobile broadband (eMBB) and the ultra-reliable lowlatency communication (URLLC) in the downlink of a multicell massive MIMO system is rigorously analyzed in this work. We provide a unified information-theoretic framework blending an infinite-blocklength analysis of the eMBB spectral efficiency (SE) in the ergodic regime with a finite-blocklength analysis of the URLLC error probability relying on the use of mismatched decoding, and of the so-called saddlepoint approximation. Puncturing (PUNC) and superposition coding (SPC) are considered as alternative downlink coexistence strategies to deal with the inter-service interference, under the assumption of only statistical channel state information (CSI) knowledge at the users. eMBB and URLLC performances are then evaluated over different precoding techniques and power control schemes, by accounting for imperfect CSI knowledge at the base stations, pilot-based estimation overhead, pilot contamination, spatially correlated channels, the structure of the radio frame, and the characteristics of the URLLC activation pattern. Simulation results reveal that SPC is, in many operating regimes, superior to PUNC in providing higher SE for the eMBB yet achieving the target reliability for the URLLC with high probability. Moreover, PUNC might cause eMBB service outage in presence of high URLLC traffic loads. However, PUNC turns to be necessary to preserve the URLLC performance in scenarios where the multi-user interference cannot be satisfactorily alleviated.

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