Mobility tracking of internet of things (IoT) devices in smart city infrastructures such as smart buildings, hospitals, shopping centers, warehouses, smart streets, and outdoor spaces has many applications, and BLE is available in almost every IoT device in the market nowadays. Developing an accurate ranging technique for Low powered network-enabled, e.g., Lora, BLE, IoT devices (both battery powered and batterless) is a challenging feat as billions of these devices are already in use, and for pragmatic reasons, we cannot propose to modify the IoT device (a BLE peripheral) itself. While current solutions focuses on active localization, energy-constraint devices are not suitable for this additional computation. Thus we focus on pasive localization by exploit characteristics of netowrk protocols protocol (e.g., frequency hopping and empty control packet transmissions for BLE) and propose a technique to directly estimate the range of a peripheral from a access point by multipath profiling. As timing delay is a significant for localization, we also focus on real-time constraint of the low-power networks.
Publications
Rethinking Ranging of Unmodified BLE Peripherals in Smart City Infrastructure, MMSys ‘18
Duty-Cycle-Aware Real-Time Scheduling of Wireless Links in Low Power WANs, DCOSS ‘18
WiP: LoRaIn: Making a Case for LoRa in Indoor Localization, PerCom ‘19