Active IRS Design for RSMA-based Downlink URLLC Transmission

Darabi M, Ghanem W, Jamali V, Lampe L, Schober R (2023)

Publication Type: Conference contribution

Publication year: 2023

Publisher: Institute of Electrical and Electronics Engineers Inc.

Book Volume: 2023-March

Conference Proceedings Title: IEEE Wireless Communications and Networking Conference, WCNC

Event location: Glasgow, GBR

ISBN: 9781665491228

DOI: 10.1109/WCNC55385.2023.10118968

Abstract

Rate-splitting multiple access (RSMA) has been proposed as a flexible multiple access scheme for improving interference management in sixth-generation (6G) networks. In particular, the low latency facilitated by RSMA and its robustness against user mobility and imperfect channel state information make it an ideal candidate for the ultra-reliable and low-latency (URLLC) use case in 6G networks. However, since the common message in RSMA needs to be decoded by all the users, the achievable rate of the common message is determined by the user with the poorest channel quality. To overcome this bottleneck, an active intelligent reflecting surface (IRS) can be deployed to enhance the achievable rate of the common stream. However, this comes at the expense of additional power consumption due to the active IRS. In this paper, we consider an active IRS-aided RSMA-based downlink URLLC system and study the resource allocation design for minimization of the power consumption of the base station and the active IRS under quality-of-service constraints for the URLLC users. Our simulation results reveal that active IRSs yield a lower overall power consumption and require a smaller surface size compared to passive IRSs in RSMA-based URLLC systems. Moreover, we show that active IRS-aided RSMA systems consume less power than active IRS-aided space division multiple access (SDMA) systems.

Authors with CRIS profile

Walid Ghanem Lehrstuhl für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Technische Universität Darmstadt DE Germany (DE) University of British Columbia CA Canada (CA)

How to cite

APA:

Darabi, M., Ghanem, W., Jamali, V., Lampe, L., & Schober, R. (2023). Active IRS Design for RSMA-based Downlink URLLC Transmission. In IEEE Wireless Communications and Networking Conference, WCNC. Glasgow, GBR: Institute of Electrical and Electronics Engineers Inc..

MLA:

Darabi, Mostafa, et al. "Active IRS Design for RSMA-based Downlink URLLC Transmission." Proceedings of the 2023 IEEE Wireless Communications and Networking Conference, WCNC 2023, Glasgow, GBR Institute of Electrical and Electronics Engineers Inc., 2023.

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