PLCC:面向跨数据中心网络的路径内反馈拥塞控制机制研究
Path-In-Network Feedback Congestion Control for Inter-Data Center Networks
梁宇鹏 1汪硕1
作者信息
- 1. 北京邮电大学信息与通信工程学院，北京 100876
- 折叠
摘要
针对广域算力互联网络中长反馈时延与混合流量耦合问题，本文提出一种面向跨数据中心场景的路径内反馈拥塞控制机制。该机制在保持端侧拥塞控制协议兼容性的基础上，引入路径内辅助控制层，将部分拥塞感知与调节功能前移至数据中心互联交换机，从而缩短反馈路径并降低控制滞后.仿真实验结果表明，PLCC 在不同流量负载场景下均优于传统方案，对比DCQCN方案，PLCC平均FCT降低幅度约为67.9%-80.3%；99分位FCT降低幅度约为59.2%-83.3%。相较于BiCC，PLCC平均FCT降低幅度约为12%-26%；在99分位FCT方面，降低幅度约为8%-28%证明了其在长距离、高带宽时延积环境下抑制速率震荡与缓解控制滞后的有效性。
Abstract
To address the issues of long feedback delay and mixed traffic coupling in wide-area computing interconnection networks, this paper proposes a path-in-network feedback congestion control mechanism for inter-data center scenarios. The proposed mechanism maintains compatibility with existing end-host congestion control protocols while introducing an in-network auxiliary control layer, which shifts part of the congestion detection and regulation functions to data center interconnect (DCI) switches. By doing so, it effectively shortens the feedback path and mitigates control latency.
Simulation results demonstrate that PLCC consistently outperforms conventional schemes under various traffic load conditions. Compared with DCQCN, PLCC reduces the average flow completion time (FCT) by approximately 67.9%-80.3%, and the 99th percentile FCT by about 59.2%-83.3%. Compared with BiCC, PLCC achieves a reduction of approximately 12%-26% in average FCT and 8%-28% in 99th percentile FCT. These results verify its effectiveness in suppressing rate oscillations and alleviating control lag in long-distance, high bandwidth-delay product environments.关键词
拥塞控制/RDMA/跨数据中心网络/流完成时间。Key words
Congestion Control/RDMA/Inter-Data Center Networks/Flow Completion Time引用本文复制引用
梁宇鹏,汪硕.PLCC:面向跨数据中心网络的路径内反馈拥塞控制机制研究[EB/OL].(2026-04-24)[2026-04-26].http://www.paper.edu.cn/releasepaper/content/202604-192.学科分类
通信
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