New Optimal Channel Assignment for Hierarchical Cellular Networks

This paper discusses the channel assignments which lead to the highest possible communication connectivity on the condition that the total number of required channels is constant. Several channel assignment schemes have been proposed depending on repacking approaches; non-repacking, always repacking, and repacking on demand. In this paper, these schemes are evaluated primarily with the prospect of attaining the highest communication connectivity. The evaluations quantitatively indicate that repacking on demand may significantly outperform the others under the condition that not only the number of prepared micro-cell channels remains constant, but also the total number prepared of both micro-cell and macro-cell channels remains constant as well