Building Entry Loss - problems of definition

There is an increasing expectation that wireless services should be ubiquitously available, with seamless connectivity whether the user is indoors or outdoors. It is therefore important that the impact of buildings on the propagation of radiowaves be understood and reliably characterised. Although many measurements have been made over the decades, it is not always easy to apply the information. In particular, different definitions of entry loss are widely used, and the variability associated with the median entry loss may relate to different quantities. These issues are discussed in the context of new measurements of building loss between 88 MHz and 5.8 GHz.