Multiuser Resource Allocation for Semantic-Relay-Aided Text Transmissions

Zeyang Hu1; Tianyu Liu1; Changsheng You1; Zhaohui Yang2; Mingzhe Chen3

10.1109/GCWkshps58843.2023.10464724

2023-12-08

979-8-3503-7022-5

2023 IEEE Globecom Workshops (GC Wkshps)

4-8 Dec. 2023

Kuala Lumpur, Malaysia

Semantic communication (SemCom) is an emerging technology that extracts useful meaning from data and sends only relevant semantic information. Thus, it has the great potential to improve the spectrum efficiency of conventional wireless systems with bit transmissions, especially in low signal-to-noise ratio (SNR) and small bandwidth regions. However, the existing works have mostly overlooked the constraints of mobile devices, which may not have sufficient capabilities to implement resource-demanding semantic encoder/decoder based on deep learning. To address this issue, we propose in this paper a new semantic relay (SemRelay), which is equipped with a semantic receiver to assist multiuser text transmissions. Specifically, the SemRelay decodes semantic information from a base station and forwards it to the users using conventional bit transmission, hence effectively improving text transmission efficiency. To study the multiuser resource allocation, we formulate an optimization problem to maximize the multiuser weighted sum-rate by jointly designing the SemRelay transmit power allocation and system bandwidth allocation. Although this problem is non-convex and hence challenging to solve, we propose an efficient algorithm to obtain its high-quality suboptimal solution by using the block coordinate descent method. Last, numerical results show the effectiveness of the proposed algorithm as well as superior performance of the proposed SemRelay over the conventional decode-and-forward (DF) relay, especially in small bandwidth region.

第一

1.Department of Electronic and Electrical Engineering, Southern University of Science and Technology, Shenzhen, China
2.College of Information Science and Electronic Engineering, ZheJiang University, Hangzhou, China
3.Department of Electrical and Computer Engineering, Institute for Data Science and Computing, University of Miami, Coral Gables, FL, USA

Zeyang Hu,Tianyu Liu,Changsheng You,et al. Multiuser Resource Allocation for Semantic-Relay-Aided Text Transmissions[C],2023.