Data Management Services for Evaluation of RF-based Indoor Localization

This report presents R2DM (Raw Ranging Data Management) and PDM (Processed Data Management) services. R2DM service is a web service developed for storing, managing and accessing the raw data from indoor localization benchmarking experiments. By raw ranging data we mean the measured physical values used as input for the localization algorithms, such as Angle of Arrival (AoA), Time of Arrival (ToA) and Received Signal Strength (RSS). Storing the raw data of indoor localization benchmarking experiments, together with the ground truth location and time of where and when the raw data was obtained and the device used for obtaining the data, gives the possibility of reusing the same raw data for benchmarking other indoor localization algorithms, thus achieving entirely objective comparison of performance of different algorithms. PDM service is the web service developed for storing the processed data, i.e. results of indoor localization benchmarking experiments, namely sets of ground truths and location estimates, together with latencies of location estimation, power consumptions, etc. Having the database of benchmarked solutions gives users the possibility of comparing their solutions with the performance of other benchmarked solutions and gives them the possibility of finding the best solution for their requirements. The report begins with the presentation of usual procedures (multilateration / multiangulation, fingerprinting, proximity) of estimating indoor location using usual types of raw data, namely RSS (Received Signal Strength), ToA (Time of Arrival) and AoA (Angle of Arrival). Moreover, it gives the design overview of developed services and it puts these services in the wider context of experimental benchmarking of indoor localization. Furthermore, it gives the detailed overview of the R2DM and PDM architectures, the hierarchy of data and metadata storage, and the description of the used message types. Finally, it provides descriptions of the functions that APIs of both services provide with examples of their usage.