Adopting Dilution of Precision for Indoor Localization.

Due to the rising number of aged people in the last decades, many apprehensions about their quality of life and their personal security in their own homes came to surface especially when these persons prefer to live alone. Compared to other age groups, old persons are more susceptive to domestic incidents, such as sudden illnesses and falls. Therefore, using new technologies in elderly homecare became one of the most urgent issues to study. These technologies are classified into three categories: real time vital sign monitoring, activity recognition and indoor localization. In this paper we present our work in indoor positioning which is the combination of three existing technologies in a more effective, precise and accurate way: Bluetooth Low Energy, Acoustic and Light Fidelity (LiFi). Our main contribution is the proposition of new "dilution of precision" (DOP) indicators as precision weights of the results given by each technology. Depending on these new DOP-like indicators, we were able to judge how much precise and accurate the returned results are. The experiments we conducted proved that precision is much better when using these new precision metrics. [ABSTRACT FROM AUTHOR]