B. Johny and A. Anpalagan suggested health-care monitoring challenges can be tackled by interfacing sensors and actuators which form body area networks (BANs) with the human body together with the support of wireless technology and mobile and cloud computing . Three stages of health-care monitoring system have been defined, which are sensors, data hub and medical network. There are three different types of sensors namely physiological sensors, biokinetic sensors and ambient sensors. Sensors attached to body form a body area sensor network. (Wireless) Sensors gather signals from the body and relay them to each other and the data hub. There is an attempt to develop a body intranet in which, sensor data are gathered by a single node. The node act as a monitoring node, connect to medical network via wireless technology. The connectivity of sensors with processing device is achieved using radio frequency technology such as ANT, Bluetooth, Sensium, Zarlink and Zigbee. Data hub stores sensor data which to be released to a medical network. Normally, cell phone or personal digital assistant is used as data hub. The medical network is usually operated by hospital, clinic or telemedicine center. The medical network receives all patients data for assessing their health status by the physicians. The data can be sent over LAN, WAN or cellular network.
 B. Johny and A. Anpalagan, ‘Body Area Sensor Networks: Requirements, Operations, and Challenges’, IEEE Potentials, vol. 33, no. 2, pp. 21–25, Apr. 2014.