Social Learning in Multi Agent Multi Armed Bandits
Social Learning in Multi Agent Multi Armed Bandits
复制标题
多代理多武装强盗中的社会学习
DOI:
10.1145/3393691.3394217
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Shakkottai, Sanjay
中科院分区:
文献类型:
--
作者:
Sankararaman, Abishek;Ganesh, Ayalvadi;Shakkottai, Sanjay
Motivated by emerging need of learning algorithms for large scale networked and decentralized systems, we introduce a distributed version of the classical stochastic Multi-Arm Bandit (MAB) problem. Our setting consists of a large number of agents n that collaboratively and simultaneously solve the same instance of K armed MAB to minimize the average cumulative regret over all agents. The agents can communicate and collaborate among each other only through a pairwise asynchronous gossip based protocol that exchange a limited number of bits. In our model, agents at each point decide on (i) which arm to play, (ii) whether to, and if so (iii) what and whom to communicate with. Agents in our model are decentralized, namely their actions only depend on their observed history in the past. We develop a novel algorithm in which agents, whenever they choose, communicate only arm-ids and not samples, with another agent chosen uniformly and independently at random. The per-agent regret scaling achieved by our algorithm is $\BigO łeft( \fracłceil\fracK n \rceil+łog(n) Δ łog(T) + \fracłog^3(n) łog łog(n) Δ^2 \right) $. Furthermore, any agent in our algorithm communicates (arm-ids to an uniformly and independently chosen agent) only a total of Θ(łog(T))$ times over a time interval of T. We compare our results to two benchmarks - one where there is no communication among agents and one corresponding to complete interaction, where an agent has access to the entire system history of arms played and rewards obtained of all agents. We show both theoretically and empirically, that our algorithm experiences a significant reduction both in per-agent regret when compared to the case when agents do not collaborate and each agent is playing the standard MAB problem (where regret would scale linearly in K), and in communication complexity when compared to the full interaction setting which requires T communication attempts by an agent over T arm pulls. Our result thus demonstrates that even a minimal level of collaboration among the different agents enables a significant reduction in per-agent regret.
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DOI:
--
发表时间:
2016
期刊:
International Conference on Machine Learning
影响因子:
--
作者:
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Liran Szlak
DOI:
--
发表时间:
2018
期刊:
Neural Information Processing Systems
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2015
期刊:
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作者:
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DOI:
--
发表时间:
2018
期刊:
arXiv.org
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作者:
David Martínez;Varun Kanade;Patrick Rebeschini
通讯作者:
Patrick Rebeschini
DOI:
--
发表时间:
2004
期刊:
Proc. 7^<th> Int. Symp. on Distributed Autonomous Robotic Systems
影响因子:
--
作者:
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