I was recently asked by a business associate how to estimate the capital costs of an LTE network. Inevitably our discussion led to estimating the number of sites required to cover a market. Designing to meet coverage requirements along with its complement, capacity requirements, form the basis for estimating the size, and consequently cost, of the radio access network. This is something that differentiates the financial modeling service provided by Telesystem Innovations. So I like to expand in this post on a few general principles related to path loss models which play a critical part is determining cell size.