AFCC: ACK-Based Fast Congestion Control in Lossless Networks

doi:10.1109/TON.2025.3598142

	AFCC: ACK-Based Fast Congestion Control in Lossless Networks
	Xu, Jing 1; Yuan, Guojun 1; Zhang, Yachao 2; Wang, Zhan 1; Sun, Ninghui 1; Tan, Guangming 1
	2025-08-20
发表期刊	IEEE TRANSACTIONS ON NETWORKING
页码	15
摘要	Congestion control is vital for achieving ultra-low latency and ultra-high throughput in large-scale data centers. However, existing mechanisms like DCQCN and HPCC often respond slowly and inaccurately to congestion, leading to extended queuing delays and reduced throughput. The notification delay of nearly one round-trip time (RTT) exacerbates congestion issues. Furthermore, these algorithms fail to identify queue growth caused by priority flow control (PFC) pause frames from the downstream device in lossless networks, resulting in unnecessary rate reductions on innocent flows. In this paper, we introduce the ACK-based Fast Congestion Control (AFCC) mechanism, designed to achieve sub-RTT notification delays by leveraging ACK packets. To enhance responsiveness to last-hop congestion, AFCC incorporates the number of concurrent congested flows within each ACK. Furthermore, AFCC utilizes ACK's In-band Network Telemetry (INT) to identify the paused phase, thereby facilitating accurate congestion detection. Experimental results show that AFCC effectively maintains high utilization and significantly reduces flow completion time by 31.2% compared to HPCC and 78.4% compared to DCQCN.
关键词	Switches Delays Throughput Flow production systems Accuracy Receivers Telemetry Market research Hardware Congestion control HPCC RDMA data center PFC PFC
DOI	10.1109/TON.2025.3598142
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[T2125013] ; National Natural Science Foundation of China[62032023] ; Beijing Municipal Science and Technology Program[Z241100004224026]
WOS研究方向	Computer Science ; Engineering ; Telecommunications
WOS类目	Computer Science, Hardware & Architecture ; Computer Science, Theory & Methods ; Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:001556126900001
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/2XEOYT63/41793
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Yuan, Guojun; Tan, Guangming
作者单位	1.Chinese Acad Sci, Inst Comp Technol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Comp Sci & Technol, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jing,Yuan, Guojun,Zhang, Yachao,et al. AFCC: ACK-Based Fast Congestion Control in Lossless Networks[J]. IEEE TRANSACTIONS ON NETWORKING,2025:15.
APA	Xu, Jing,Yuan, Guojun,Zhang, Yachao,Wang, Zhan,Sun, Ninghui,&Tan, Guangming.(2025).AFCC: ACK-Based Fast Congestion Control in Lossless Networks.IEEE TRANSACTIONS ON NETWORKING,15.
MLA	Xu, Jing,et al."AFCC: ACK-Based Fast Congestion Control in Lossless Networks".IEEE TRANSACTIONS ON NETWORKING (2025):15.