Power Minimization of Downlink Spectrum Slicing for eMBB and URLLC Users
| Autor: | Fabio Saggese, Marco Moretti, Petar Popovski |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Signal Processing (eess.SP)
FOS: Computer and information sciences Downlink Information Theory (cs.IT) Computer Science - Information Theory Power saving Resource management Applied Mathematics Ultra reliable low latency communication Wireless communication NOMA Receivers Multiplexing RAN slicing Computer Science Applications eMBB FOS: Electrical engineering electronic engineering information engineering Electrical Engineering and Systems Science - Signal Processing Electrical and Electronic Engineering URLLC |
| Zdroj: | Saggese, F, Moretti, M & Popovski, P 2022, ' Power Minimization of Downlink Spectrum Slicing for eMBB and URLLC Users ', IEEE Transactions on Wireless Communications, vol. 21, no. 12, pp. 11051-11065 . https://doi.org/10.1109/TWC.2022.3189396 |
| ISSN: | 1558-2248 1536-1276 |
| Popis: | 5G technology allows heterogeneous services to share the wireless spectrum within the same radio access network. In this context, spectrum slicing of the shared radio resources is a critical task to guarantee the performance of each service. We analyze a downlink communication serving two types of traffic: enhanced mobile broadband (eMBB) and ultra-reliable low-latency communication (URLLC). Due to the nature of low-latency traffic, the base station knows the channel state information (CSI) of the eMBB users while having statistical CSI for the URLLC users. We study the power minimization problem employing orthogonal multiple access (OMA) and non-orthogonal multiple access (NOMA) schemes. Based on this analysis, we propose a lookup table-based approach and a block coordinated descent (BCD) algorithm. We show that the BCD is optimal for the URLLC power allocation. The numerical results show that NOMA leads to lower power consumption than OMA, except when the average channel gain of the URLLC user is very high. For the latter case, the optimal approach depends on the channel condition of the eMBB user. Even when OMA attains the best performance, the gap with NOMA is negligible, showing the capability of NOMA to reduce power consumption in practically every condition. This work has been accepted to IEEE Transactions on Wireless Communication for publication. Copyright may be transferred without notice, after which this version may no longer be accessible |
| Databáze: | OpenAIRE |
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