计算机科学 ›› 2026, Vol. 53 ›› Issue (9): 375-384.doi: 10.11896/jsjkx.250700002
魏德宾1, 王欣睿1, 杨力2, 潘成胜3
WEI Debin1, WANG Xinrui1, YANG Li2, PAN Chengsheng3
摘要: 低轨卫星通信网络具有覆盖广、传播延迟低等优势,但其动态变化的拓扑结构、带宽受限等特性可能对高时效性业务的服务质量造成显著影响。针对此问题,提出了一种融合双延迟深度确定性策略梯度(Twin Delayed Deep Deterministic Policy Gradient,TD3)与对决网络(Dueling Network)的智能主动队列管理算法DTD3-AQM。该算法引入卫星网络的时变拓扑矩阵与多维队列性能指标,设计多目标奖励机制,在实现拥塞控制的同时兼顾数据新鲜度。基于MATLAB-NS3联合平台在Linux环境下开展的仿真实验表明,DTD3-AQM在各项性能指标中实现了较优的综合权衡。在200个TCP源的条件下,与侧重系统性能的QueuePilot相比,DTD3-AQM将排队时延减少11.3 ms、信息年龄降低87.2 ms,虽吞吐量略有下降,但提升了拥塞控制能力与信息时效保障水平;相较于侧重信息新鲜度的DeepAAQM,DTD3-AQM在吞吐量方面提升3.1 Mbps、丢包率下降0.29%,但DeepAAQM在降低信息年龄方面仍具有显著优势。
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