With the growing elderly population of the world, the number of elderly people who live alone is continuously growing. Providing them with high-quality healthcare has become a major concern nowadays. In order to detect the elderly people’s sudden danger of living alone, this article proposes a path construction mechanism, called JECP, which aims to conserve energy and avoid collision for the emergent sensors in Bluetooth mesh networks. In case that the emergent sensors are deployed in the same room, the proposed JECP constructs disjoint paths to avoid collisions, which are triggered by the same emergent event at the same time. The other case is that the emergent sensors are deployed in different rooms. The probability that these emergent sensors are triggered by the same event is very small. Hence, the proposed JECP constructs the best emergent path that shares the general sensors as much as possible to save energy consumption. The experimental results show that the proposed JECP outperforms the existing mechanisms in terms of transmission delay and energy consumption for the emergent sensors in Bluetooth low-energy (BLE) networks.
