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arXiv · 1812.09778

Reinforcement Learning for Self-Organization and Power Control of Two-Tier Heterogeneous Networks

Roohollah Amiri·Mojtaba Ahmadi Almasi·Jeffrey G. Andrews·Hani Mehrpouyan
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Abstract

Self-organizing networks (SONs) can help manage the severe interference in dense heterogeneous networks (HetNets). Given their need to automatically configure power and other settings, machine learning is a promising tool for data-driven decision making in SONs. In this paper, a HetNet is modeled as a dense two-tier network with conventional macrocells overlaid with denser small cells (e.g. femto or pico cells). First, a distributed framework based on multi-agent Markov decision process is proposed that models the power optimization problem in the network. Second, we present a systematic approach for designing a reward function based on the optimization problem. Third, we introduce Q-learning based distributed power allocation algorithm (Q-DPA) as a self-organizing mechanism that enables ongoing transmit power adaptation as new small cells are added to the network. Further, the sample complexity of the Q-DPA algorithm to achieve $\epsilon$-optimality with high probability is provided. We demonstrate, at density of several thousands femtocells per km$^2$, the required quality of service of a macrocell user can be maintained via the proper selection of independent or cooperative learning and appropriate Markov state models.

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Roohollah Amiri, Mojtaba Ahmadi Almasi, Jeffrey G. Andrews, Hani Mehrpouyan. 2018-12-23. Reinforcement Learning for Self-Organization and Power Control of Two-Tier Heterogeneous Networks. https://arxiv.org/abs/1812.09778

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