Caching popular contents at edge devices is an effective solution to alleviate the burden of the backhaul networks. Earlier investigations commonly neglected the storage cost in caching. More recently, retention-aware caching, where both the downloading cost and storage cost are accounted for, is attracting attention. Motivated by this, we address proactive and retention-aware caching with user mobility, optimizing the sum of the two types of costs. This is a combinatorial optimization problem. However, we derive a stream of analytical results and they together lead to an algorithm that guarantees global optimum with polynomial-time complexity. Numerical results show significant improvements in comparison to popular caching and random caching.
@article{arxiv.1901.02750,
title = {On Optimal Proactive and Retention-Aware Caching with User Mobility},
author = {Ghafour Ahani and Di Yuan},
journal= {arXiv preprint arXiv:1901.02750},
year = {2019}
}
Comments
submitted to the 2018 IEEE 88th Vehicular Technology Conference