Hybrid Wireless Data Transfer In A Medical Sensor Node

Abstract: More than 17.9 million new patients worldwide suffer from heart diseases. In order to conduct a proper diagnosis and treatment, it is necessary to develop a functionality for patients and doctors, which has the possibility to transfer the continuously measured data to the doctor for several days. In addition, such a tool should have the function to wirelessly transmit an alarm to the doctors, provided in the event of a critical situation. Consider this, we take two technologies into account: long-range and short-range technologies. This work presents the significant trade-offs for long-range communication: coverage, reliability and energy consumption. This consumption is also an essential parameter for short-range communication, as well as datarate and payloadsize. Besides the transfer of the data, generated by the heart monitoring patch, the patient needs to be located efficiently. That is why different types of GNSS technologies are compared. The measurements show that the chosen communication technologies (NB-IoT and BLE) fulfill the requirement and that it is possible to, with some finetuning, only NB-IoT can achieve the requirements of both normal and critical situation. Furthermore, the localisation technologies needs improvement for more accurate localisation.