Reduced Feedback, User Scheduling, and Mode Selection in Asymmetric Full-Duplex Systems

Kiran, R and Mehta, NB (2020) Reduced Feedback, User Scheduling, and Mode Selection in Asymmetric Full-Duplex Systems. In: 2020 IEEE Global Communications Conference, GLOBECOM 2020, 7-11 Dec 2020, Taipei; Taiwan.

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Abstract

In a full-duplex (FD) system, the base station (BS) needs to carefully schedule the uplink and downlink users that transmit simultaneously to control the inter-user interference. The efficacy of scheduling is closely tied to the availability of channel state information and the feedback scheme that conveys it to the BS. We propose a novel user-pair scheduling and mode selection algorithm (UPSMA) and a reduced feedback scheme, in which a user feeds back only a limited number of inter-user interferences that are below a pre-specified threshold. We derive expressions for the uplink and downlink rates of UPSMA in the presence of small-scale fading, large-scale shadowing, and pathloss. These lead to novel scaling laws for the threshold and the uplink and downlink rates. Even with limited feedback, UPSMA achieves a higher sum rate compared to a half-duplex system and conventional FD resource allocation algorithms. © 2020 IEEE.

Item Type:	Conference Paper
Publication:	2020 IEEE Global Communications Conference, GLOBECOM 2020 - Proceedings
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright of this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Channel state information; Finite difference method; Scheduling, Feedback scheme; Inter-user interference; Limited feedback; Mode selection; Reduced feedbacks; Resource allocation algorithms; Small-scale fading; User scheduling, Feedback
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	11 Mar 2021 09:10
Last Modified:	11 Mar 2021 09:10
URI:	http://eprints.iisc.ac.in/id/eprint/68245

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