Adaptive Time-Slot Optical Switching for Latency-Sensitive IoT Fronthaul in 6G Networks

doi:10.1109/JLT.2025.3620367

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	Adaptive Time-Slot Optical Switching for Latency-Sensitive IoT Fronthaul in 6G Networks
	Yang, Changsheng 1; Xue, Xuwei 1; Pan, Bitao 1; Guo, Bingli 1; Qiu, Zihan 1; Li, Wenzhe 2; Shen, Shikui 3; Hu, Yakun 3; Wu, Xianchen 1; Yuan, Guojun 2; Wei, Buzheng 3; Li, Xiao 1; Huang, Shanguo 1
	2025-12-15
发表期刊	JOURNAL OF LIGHTWAVE TECHNOLOGY
ISSN	0733-8724
卷号	43 期号:24 页码:10930-10938
摘要	The explosive growth of latency-sensitive IoT applications and the emergence of 6G networks are placing unprecedented demands on cloud radio access networks (C-RAN), with the fronthaul segment becoming a critical performance bottleneck. Conventional fixed time-slot scheduling in optical fronthaul networks struggles to accommodate the highly dynamic and bursty traffic patterns inherent in emerging IoT and 6G applications. The static allocation of time-slots prevents networks from responding flexibly to real-time traffic variations, causing some slots to remain underutilized during periods of low traffic, while others become congested under high-load conditions. To address the limitations of conventional fixed time-slot scheduling in optical fronthaul systems, this paper proposes a buffer-aware, adaptive time-slot scheduling mechanism tailored for optical switching-based C-RAN architectures. The proposed mechanism operates on a matrix of virtual queues and employs a max-occupancy arbitration strategy to prioritize heavily loaded buffers, ensuring contention-free transmissions across transmitter-receiver (Tx-Rx) port pairs. Furthermore, the time-slot duration is dynamically adjusted based on real-time buffer occupancy ratio, providing fine-grained control over bandwidth allocation while protecting unscheduled queues from overflow. Experimental results demonstrate that the adaptive time-slot scheduling approach achieves a 2.6x reduction in average latency and maintains packet loss rates below 2.37E-10 under full-load conditions-significantly outperforming fixed timeslot-slot mechanism that exhibit up to 67.32% packet loss.
关键词	Optical buffering Optical switches Optical reflection Real-time systems Adaptive optics Optical transmitters Resource management Job shop scheduling Dynamic scheduling 6G mobile communication 6G network architecture adaptive time-slot scheduling edge computing Internet of Things optical fronthaul optical switching network
DOI	10.1109/JLT.2025.3620367
收录类别	SCI
语种	英语
WOS研究方向	Engineering ; Optics ; Telecommunications
WOS类目	Engineering, Electrical & Electronic ; Optics ; Telecommunications
WOS记录号	WOS:001632332400006
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/42960
专题	中国科学院计算技术研究所
通讯作者	Xue, Xuwei
作者单位	1.Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China 2.Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China 3.China Unicom Res Inst, Beijing 100176, Peoples R China
推荐引用方式 GB/T 7714	Yang, Changsheng,Xue, Xuwei,Pan, Bitao,et al. Adaptive Time-Slot Optical Switching for Latency-Sensitive IoT Fronthaul in 6G Networks[J]. JOURNAL OF LIGHTWAVE TECHNOLOGY,2025,43(24):10930-10938.
APA	Yang, Changsheng.,Xue, Xuwei.,Pan, Bitao.,Guo, Bingli.,Qiu, Zihan.,...&Huang, Shanguo.(2025).Adaptive Time-Slot Optical Switching for Latency-Sensitive IoT Fronthaul in 6G Networks.JOURNAL OF LIGHTWAVE TECHNOLOGY,43(24),10930-10938.
MLA	Yang, Changsheng,et al."Adaptive Time-Slot Optical Switching for Latency-Sensitive IoT Fronthaul in 6G Networks".JOURNAL OF LIGHTWAVE TECHNOLOGY 43.24(2025):10930-10938.