Mobility Support of IoT Solution in Home Care Wireless Sensor Network

We study mobility of sensors in our ongoing home care project, where care-purpose sensors together with home automation devices are installed in private houses. The Internet of Things (IoT) solution is implemented in the project, as networks of IP-enabled sensors and devices are built, based on standardized IoT protocols. Since wearable sensors are important for monitoring of health conditions, we investigate the performance of such networks with mobile nodes, by assessing MAC layer protocols and Routing Protocol for Low-Power and Lossy Networks (RPL). We utilize the recently released Contiking operating system and its simulation tool: Cooja. In the first simulation scenario, we place a mobile node in networks with different densities of nodes, comparing MAC layer mechanisms: CSMA/CA and TSCH. In the second scenario, we focus on a given network where sensors are placed as in our modeled apartment. Under the certain network size and topology, we design schedule of TSCH and optimize control message interval of RPL to get better mobility supporting.