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arXiv 2503.03097cs.NI
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异构相关随机接入网络中的及时且高能效信息传输

Timely and Energy-Efficient Information Delivery in Heterogeneous Correlated Random Access Networks

Anshan Yuan, Xinghua Sun, Yayu Gao, Wen Zhan, Xiang Chen

AI总结:

本文研究异构相关随机接入网络的AoI与能效联合优化,提出分析模型推导闭式表达式,设计统一传输策略与MS-PAdam算法,实现高竞争场景下更优的性能权衡。

摘要:

本文针对异构相关随机接入网络中信息年龄(AoI)与能效的联合优化问题展开研究,该网络中每个传感器采用不同的传输概率,且其观测值与其他传感器的观测值存在相关性。论文提出一种分析模型,用于解析每个传感器的AoI和能效,推导了长期平均AoI与能效的闭式表达式,明确考虑了空间相关性和状态相关的功耗。通过约束所有传感器采用相同的传输概率,推导得到三种统一传输策略:年龄最优策略(q_A^)、能效最优策略(q_E^)以及联合优化AoI与能效的帕累托最优策略(q^);复杂度为O(1/(n q_epsilon))的有界穷举搜索可保证q^的高效计算。理论上证明了空间相关性下的相关增益能显著提升两项性能指标。为利用传感器的异构性,论文提出一种基于梯度的迭代算法——多起点投影自适应矩估计(MS-PAdam),用于联合优化所有传感器的传输概率,可高效收敛至最优的AoI-能效权衡点。关键在于,MS-PAdam会自适应抑制那些边际收益低于相关邻居贡献的传输,大幅缓解接入竞争。数值结果表明,MS-PAdam性能优于统一策略,在高竞争场景下可实现协调运行,缓解AoI与能效的下降。

英文摘要:

This paper characterizes and jointly optimizes Age of Information (AoI) and energy efficiency in heterogeneous correlated random access networks, where each sensor adopts a distinct transmission probability and its observations are correlated with those of other sensors. An analytical model is proposed to analyze AoI and energy efficiency for each sensor. Closed-form expressions for long-term average AoI and energy efficiency are derived, explicitly accounting for spatial correlation and state-dependent power consumption. By constraining sensors to adopt the same transmission probability, three unified transmission strategies are derived: the age-optimal strategy (q_A^), the energy-efficiency optimal strategy (q_E^), and the Pareto-optimal strategy (q^), which jointly optimizes AoI and energy efficiency. A bounded exhaustive search with O(1/(n q_epsilon)) complexity guarantees efficient computation of q^. Theoretically, the correlation gain is proven to significantly enhance both metrics under spatial correlation. To exploit sensor heterogeneity, a gradient-based iterative algorithm, Multi-Start Projected Adaptive Moment Estimation (MS-PAdam), is proposed to jointly optimize all sensors' transmission probabilities, efficiently converging to the optimal AoI-energy-efficiency tradeoff. Crucially, MS-PAdam adaptively suppresses transmissions where marginal gains are outweighed by correlated neighbors' contributions, substantially alleviating competition. Numerical results show MS-PAdam outperforms unified strategies, achieving harmonious operation that mitigates AoI/energy degradation in contention-intensive scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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