Echo State Networks for Proactive Caching in Cloud-Based Radio Access Networks with Mobile Users
Mingzhe Chen, Walid Saad, Changchuan Yin, M\'erouane Debbah

TL;DR
This paper introduces a machine learning-based proactive caching strategy for cloud radio access networks, utilizing echo state networks to predict user behavior and optimize content placement, resulting in significant capacity gains.
Contribution
It proposes a novel ESN-based prediction and caching algorithm that efficiently manages limited information and improves network capacity in CRANs.
Findings
Achieves up to 30.7% capacity improvement over baseline methods.
Derives the memory capacity of ESNs for periodic mobility prediction.
Demonstrates effectiveness using real-world data from Youku and Beijing University.
Abstract
In this paper, the problem of proactive caching is studied for cloud radio access networks (CRANs). In the studied model, the baseband units (BBUs) can predict the content request distribution and mobility pattern of each user, determine which content to cache at remote radio heads and BBUs. This problem is formulated as an optimization problem which jointly incorporates backhaul and fronthaul loads and content caching. To solve this problem, an algorithm that combines the machine learning framework of echo state networks with sublinear algorithms is proposed. Using echo state networks (ESNs), the BBUs can predict each user's content request distribution and mobility pattern while having only limited information on the network's and user's state. In order to predict each user's periodic mobility pattern with minimal complexity, the memory capacity of the corresponding ESN is derived for…
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Taxonomy
TopicsNeural Networks and Reservoir Computing · Caching and Content Delivery · Cognitive Radio Networks and Spectrum Sensing
