Performance Comparisons of Basic and Advanced Neighbor Discovery Processes in BLE 4.2 and 5.0 Specifications

摘要

BLE (Bluetooth Low Energy), as one of the most promising technology, has been widely adapted in various IoT (Internet of Things) services. NDP (Neighbor Discovery Process) in BLE networks plays an important role for BLE-based IoT services, which affects the scanning performance and energy consumption directly. Since basic NDP defined in BLE 4.0 specification utilizes only three channels, as the density of BLE objects increases, the possibility of signal collisions also increases and becomes very serious to the IoT services. In order to mitigate the collision probability, an advanced NDP is described in BLE 5.0 specification. In this paper, we analyze the differences between the basic and advanced neighbor discovery processes, and compare their performances by using simulation works. The simulation results show that the discovery delay of advanced NDP is shorter than half of basic NDP.