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arXiv · 2504.07829

A Hybrid Semantic RAN Protocol Stack Design for 6G System and Its Implementation

Luhan wang·Haiwen Niu·Zhaoming Lu·Xiangming Wen
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Abstract

Recently, Semantic Communication (SC) has been recognized as a crucial new paradigm in 6G, significantly improving information transmission efficiency. However, the diverse range of service types in 6G networks, such as high-data-volume services like AR/VR/MR and low-data-volume applications requiring high accuracy, such as industrial control and data collection, presents significant challenges to fully replacing the fundamental technologies with SC. Therefore, we design a Hybrid Semantic Communication Ratio Access Network (HSC-RAN) protocol stack demo for 6G systems to achieve compatibility and smooth transition between SC and non-SC. Specifically, we take the Physical Downlink Shared Channel (PDSCH) as an example, to efficiently integrate SC with Orthogonal Frequency Division Multiplexing (OFDM). Furthermore, we introduce a novel Downlink Control Information (DCI) format that jointly supports SC and non-SC, enabling real-time video transmission via SC and text transmission through non-SC. Experimental results demonstrate that our approach allows simultaneous transmission of semantic and non-semantic information while maintaining high-quality reconstruction at the receiver.

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Luhan wang, Haiwen Niu, Zhaoming Lu, Xiangming Wen. 2025-04-10. A Hybrid Semantic RAN Protocol Stack Design for 6G System and Its Implementation. https://arxiv.org/abs/2504.07829

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