Cell site analysis; testing understanding via internal consistency checks.

This paper is aimed at Cell Site Analysis Expert Witnesses. Ground Truth Data (GTD) are essential to validation exercises, but in the UK access to practitioner-generated Call Data Records (the traces considered by Cell Site Analysis experts) are restricted, reducing opportunities for practitioners to test their understanding against real-world data. This paper outlines methods by which casework material might be used to potentially detect issues within understanding of uncertainties (and therefore improve the reliability of analyses) by reviewing the properties of casework material in parallel with the casework assessment being conducted.

Cell site analysis: Changes to networks with time.

Cell service areas may change over time as sites or cells are adjusted, decommissioned or introduced, and there may have been changes between the time of calls and the analysis undertaken. The manner in which survey data is used as part of an analysis is of particular relevance as the data gathered may not reflect the state of the network at the time of calls and thus potentially mislead. Overlaying "historic" data (potentially generated before the calls) with "targeted" surveys (usually generated after the calls) may enable an assessment of possible network changes, or whether additional cells may also have served at a given location at a previous time.