scope:

This document provides extensions to the indoor test methodology adopted in ATIS-0500022 (which was based on ATIS-0500013) and subsequently in ATIS-0500031, wherein indoor testing consisted of placing repeated stationary test calls at a handful of accurately surveyed test points inside each test building. The rationale, goals, and principles of the indoor test methodology extensions, as well as the tools required are presented and described with recommendations regarding the application of the methodology extensions to indoor accuracy testing. How the described methodology extensions can supplement existing indoor test methodology is also discussed.

Note that this document focuses exclusively on horizontal accuracy testing. Vertical accuracy testing is addressed in ATIS-0500030.

Purpose

The purpose of this set of guidelines and recommendations is to provide those engaged in testing the indoor performance of wireless location systems for 9-1-1 with a standardized, practical approach to mitigating some of the shortcomings of the indoor test methodology used so far. That methodology is susceptible to delivering results from samples where the consecutive collocated test calls are not independent due to various factors, including device memory. This situation is becoming more common in a range of newer handsets and technology implementations and can result in loss of statistical independence between successive test calls when testing indoors.