Research Article
Equal Proportional Probability Caching Policy for Heterogeneous Network Based on Stochastic Geometry Theory
@INPROCEEDINGS{10.1007/978-3-030-93398-2_47, author={Haoyang Liu and Gang Wang and Wenchao Yang and Jinlong Wang and Yao Xu and Donglai Zhao}, title={Equal Proportional Probability Caching Policy for Heterogeneous Network Based on Stochastic Geometry Theory}, proceedings={Wireless and Satellite Systems. 12th EAI International Conference, WiSATS 2021, Virtual Event, China, July 31 -- August 2, 2021, Proceedings}, proceedings_a={WISATS}, year={2022}, month={1}, keywords={Caching policy Heterogeneous network Stochastic geometry Average outage probability Equal proportional probability}, doi={10.1007/978-3-030-93398-2_47} }- Haoyang Liu
Gang Wang
Wenchao Yang
Jinlong Wang
Yao Xu
Donglai Zhao
Year: 2022
Equal Proportional Probability Caching Policy for Heterogeneous Network Based on Stochastic Geometry Theory
WISATS
Springer
DOI: 10.1007/978-3-030-93398-2_47
Abstract
In this paper, we compare different caching policies in a cache-enabled heterogeneous network (HetNet). The network is equipped with a tier of macro cell base stations (MBSs) with backhaul link and a tier of small cell base stations (SBSs) with cache memories. The two-dimensional spatial distribution of these two-tier network is modeled by stochastic geometry theory, the probability of the files being requested is modeled by Zipf distribution and the probability of the files being cached on the SBS are modeled by different particular distributions corresponding to different caching policies. We use average outage probability (AOP) to measure the performance of the system. In order to decilne the AOP of a user request, we propose a new caching policy with equal proportional probability. The performance of the new caching policy, the affect caused by SBS density changing and the affect caused by cache skewness changing are verified by Monte-Carlo simulation.
