A Hybrid Advertising Mode for Neighbor Discovery in Bluetooth Low Energy Networks

Neighbor discovery has a great impact on the performance of bluetooth low energy (BLE). BLE neighbor discovery has two advertising modes: pseudo-random delay advertising (RDA) and periodic deterministic advertising (PDA). PDA has low discovery latency but is susceptible to persistent collisions, whereas RDA does not suffer persistent collisions but has much larger discovery latency. In this paper, we propose a novel hybrid advertising mode, called Deterministic and pseudo-Random delay Advertising (DRA), which has the advantages of both PDA and RDA. We develop an analytical model for DRA, and analyze the expected discovery latency of DRA in different cases. Simulations show the accuracy of our analytical model, and verify that DRA can speed up BLE neighbor discovery.