Proactive Push with Energy Harvesting Based Small Cells in Heterogeneous Networks

LANGUAGE
English
SOURCE
IEEE ICC
Published Date:2015-6
ABSTRACT
Motivated by the recent development of energy
harvesting communications, and the trend of multimedia contents
caching and push at the access edge and user terminals, this
paper considers how to design an effective push mechanism
of energy harvesting powered small-cell base stations (SBSs) in
heterogeneous networks. The problem is formulated as a Markov
decision process by optimizing the push policy based on the
battery energy, user request and content popularity state to
maximize the service capability of SBSs. We extensively analyze
the problem and propose an effective policy iteration algorithm
to find the optimal policy. According to the numerical results, we
find that the optimal policy reveals a state dependent threshold
based structure. Besides, more than 50% performance gain is
achieved by the optimal push policy compared with the non-push
policy.