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arXiv 2303.05445cs.LGcs.DCcs.NIstat.ML
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带吸收的洪泛:复杂网络上异构多臂老虎机的高效协议

Flooding with Absorption: An Efficient Protocol for Heterogeneous Bandits over Complex Networks

Kim Jaechul Graduate School of AI, KAIST(金在哲人工智能研究生院(韩国科学技术院))

Junghyun Lee, Laura Schmid, Se-Young Yun

AI总结:

本文针对复杂网络上具有异构臂的多智能体多臂老虎机问题,提出带吸收的洪泛协议 FwA,在保持较低遗憾的同时显著降低通信成本。

摘要:

多臂老虎机被广泛用于建模序贯决策,因此在许多实际应用中无处不在,例如在线推荐系统和无线网络。我们考虑一个多智能体环境,其中每个智能体解决自己的老虎机实例,并拥有不同的臂集合。它们的目标是在给定网络上通过某种通信协议进行协作,从而最小化群体遗憾。关于该问题的已有文献仅分别考虑了臂异构性和网络化智能体。在这项工作中,我们引入了一个同时包含这两种特征的环境。针对这一新环境,我们首先为标准洪泛协议结合经典 UCB 策略提供了严格的遗憾分析。然后,为了缓解复杂网络中洪泛所产生的高通信成本问题,我们提出了一种名为“带吸收的洪泛(Flooding with Absorption,FwA)”的新协议。我们对由此得到的遗憾界进行了理论分析,并讨论了 FwA 相对于洪泛的优势。最后,我们在包括动态网络在内的多种场景下进行了实验验证,结果表明与其他网络协议相比,FwA 在遗憾性能损失极小的情况下显著降低了通信成本。

英文摘要:

Multi-armed bandits are extensively used to model sequential decision-making, making them ubiquitous in many real-life applications such as online recommender systems and wireless networking. We consider a multi-agent setting where each agent solves their own bandit instance endowed with a different set of arms. Their goal is to minimize their group regret while collaborating via some communication protocol over a given network. Previous literature on this problem only considered arm heterogeneity and networked agents separately. In this work, we introduce a setting that encompasses both features. For this novel setting, we first provide a rigorous regret analysis for a standard flooding protocol combined with the classic UCB policy. Then, to mitigate the issue of high communication costs incurred by flooding in complex networks, we propose a new protocol called Flooding with Absorption (FwA). We provide a theoretical analysis of the resulting regret bound and discuss the advantages of using FwA over flooding. Lastly, we experimentally verify on various scenarios, including dynamic networks, that FwA leads to significantly lower communication costs despite minimal regret performance loss compared to other network protocols.

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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