Print Email Facebook Twitter Optimizing Connection Establishment and Parameter Adaptation in Bluetooth Low-Energy for Intermittently-powered Devices Title Optimizing Connection Establishment and Parameter Adaptation in Bluetooth Low-Energy for Intermittently-powered Devices Author Prins, Nathan (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Pawełczak, Przemysław (mentor) de Winkel, J. (graduation committee) Katsifodimos, A (graduation committee) Degree granting institution Delft University of Technology Programme Electrical Engineering | Embedded Systems Date 2022-10-13 Abstract The growing field of research into batteryless or intermittent systems has enabled Internet of Things applications that were previously impossible. For example, the FreeBie system recently introduced Bluetooth Low-Energy (BLE)to intermittent devices, making medium to long range bi-directional communication a reality for the first time. However, this achievement also highlightedthat some inefficiencies considered acceptable for conventional systems are unacceptable when working in the intermittent domain. Our key insights are thatintermittent peripherals should dictate the connection parameters and not thecentral, that connection setup overhead should be reduced as much as possible,and that connection parameter updates should be applied faster. To achievethese goals, we 1) introduce a method of sharing connection parameters beforea connection is made, 2) introduce methods of caching connection setup packetstogether with a reconnect procedure called Fast Reconnect that reduces connection setup to a single packet, and 3) apply 1 and 2 in a dynamic algorithmcalled FRAPPUCcInO that controls connection rate based on energy harvesting capabilities. These three solutions allow intermittent BLE to be used inenvironments with less ambiently available energy than before by improvingefficiency and responsiveness. Subject Energy HarvestingIntermittent DevicesBatteryless DevicesBluetooth Low-Energy (BLE)Internet of Things (IoT)Embedded Systems To reference this document use: http://resolver.tudelft.nl/uuid:a65c3f54-85f3-4d64-8736-4f53d3633399 Embargo date 2023-10-17 Part of collection Student theses Document type master thesis Rights © 2022 Nathan Prins Files PDF msc_thesis_nathan_prins.pdf 1.06 MB Close viewer /islandora/object/uuid:a65c3f54-85f3-4d64-8736-4f53d3633399/datastream/OBJ/view