Network Design for Wireless Multi-leads ECG System Based on Bluetooth Low Energy

• Main Authors: Huang, Yu-Long, 黃裕隆
• Other Authors: Chao, Hsi-Lu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/89031985688042200403

碩士 === 國立交通大學 === 網路工程研究所 === 105 === A 100 percent wireless electrocardiography (ECG) system is prototyped and presented in this paper. Our wireless ECG system is composed of three wireless ECG sensor patches, a Bluetooth Low Energy (BLE) gateway, and a Google cloud platform. In this network architecture, the three ECG sensor patches which act as slaves and the BLE gateway which acts as master form a wireless body area network (WBAN). To archive this, time resource of master split into two phases: control phase and data phase. Master establishes connections with slaves to form the WBAN in the control phase and performs time synchronization as well as sensing data collection in the data phase. However, there is a challenge on time allocation between control phase and data phase, because the interval of control phase affects the number of WBAN which master can connect in a superframe. Therefore, we design an analysis model to analyze the connection delay of slaves in control phase to allocate time resource effectively. We use MATLAB to simulate the environment of Bluetooth Low Energy, and then compare the simulation results with our analysis results. Our analysis results are accurate because the error rate is 2%-3%. Finally, we can obtain the number of connected WBAN by time allocation algorithm after we get the connection delay from analysis model.