Proposal and Evaluation of BLE Discovery Process Based on New Features of Bluetooth 5.0

• Published in: Sensors (Basel, Switzerland) Vol. 17; no. 9; p. 1988
• Main Authors: Hernández-Solana, Ángela, Perez-Diaz-de-Cerio, David, Valdovinos, Antonio, Valenzuela, Jose Luis
• Format: Journal Article Publication
• Language: English
• Published: Switzerland MDPI AG 30.08.2017; MDPI
• Subjects: Advertising; BLE; Bluetooth; Bluetooth (Tecnologia); Bluetooth technology; Computer simulation; Comunicacions mòbils; Discovery latency; Enginyeria de la telecomunicació; Internet de les coses; Internet of things; Internet of Things (IoT); Neighbor discovery; Non-detection probability; Radiocomunicació i exploració electromagnètica; Àrees temàtiques de la UPC; non-detection probability; Internet of Things (IoT); discovery latency; BLE; neighbor discovery
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s17091988

The device discovery process is one of the most crucial aspects in real deployments of sensor networks. Recently, several works have analyzed the topic of Bluetooth Low Energy (BLE) device discovery through analytical or simulation models limited to version 4.x. Non-connectable and non-scannable undirected advertising has been shown to be a reliable alternative for discovering a high number of devices in a relatively short time period. However, new features of Bluetooth 5.0 allow us to define a variant on the device discovery process, based on BLE scannable undirected advertising events, which results in higher discovering capacities and also lower power consumption. In order to characterize this new device discovery process, we experimentally model the real device behavior of BLE scannable undirected advertising events. Non-detection packet probability, discovery probability, and discovery latency for a varying number of devices and parameters are compared by simulations and experimental measurements. We demonstrate that our proposal outperforms previous works, diminishing the discovery time and increasing the potential user device density. A mathematical model is also developed in order to easily obtain a measure of the potential capacity in high density scenarios.