Abstract
A dynamic heterogeneous and multihop (DHMH) wireless health monitoring system (WHMS) as a three-tier semi-self-organizing health monitoring network was presented. From bottom to top, the first tire of the network is the mobile data acquisition layer (DAL), the second tire of the network is the data transporting layer (DTL), and the third tire of the network is the data collection layer (DCL). A RF power control based topology management mechanism is proposed to balance the network load and to improve the network throughput. A lightweight hierarchical routing protocol (LHRP) was designed to reduce the transmission delay and improve the network throughput. For the mobile DAL nodes, the seamless mobile access mechanism (SMAM) was designed to ensure the low packet loss ratio. To evaluate the network performance, the end-to-end delay, the averaged reception ratio, and the network throughput of the DHMH were tested and the results proved that the network performance of the DHMH was improved.
Highlights
Long-term and continuous health monitoring of people is increasingly popular as there are more and more aging people and subhealth persons
(3) The end-to-end delay of the system is reduced by the lightweight hierarchical routing protocol (LHRP) that was specially designed for DHMH. (4) The seamless mobile access mechanism (SMAM) proposed in our system enables the health monitoring nodes (HMNs) to move freely with a much smaller packet loss ratio
We proposed a dynamic heterogeneous and multihop wireless health monitoring system (WHMS) for indoor health monitoring
Summary
Long-term and continuous health monitoring of people is increasingly popular as there are more and more aging people and subhealth persons. We designed a semi-self-organizing, dynamic, heterogeneous, and multihop (DHMH) WHMS for indoor healthcare aimed at monitoring the aging in the nursing homes and the white collar workers in the office buildings. The stationary DTL of the network makes the health monitoring system much more stable, while the mobility of the HMNs could enable the people being monitored to live normal lives without losing freedom. Wireless communication standards used in the WHMS are many, such as Bluetooth, WiFi, ZigBee; Bluetooth is a common used technology for it is easy to connect with the-state-of-the-art Bluetooth devices such as mobile phone. As health monitoring devices used in the WHMS are often featured with small size and resource limited, ZigBee is more suitable for the design of DHMH. (2) The fixed network backbone made of the DTL nodes makes the system more stable and reliable in data transmission. The advantages of the system proposed in this study can be summarized as follows. (1) According to the specific functions of the devices in the DHMH, three different types of devices were designed to carry out data acquisition, data transmission, and data collection, respectively. (2) The fixed network backbone made of the DTL nodes makes the system more stable and reliable in data transmission. (3) The end-to-end delay of the system is reduced by the lightweight hierarchical routing protocol (LHRP) that was specially designed for DHMH. (4) The seamless mobile access mechanism (SMAM) proposed in our system enables the HMNs to move freely with a much smaller packet loss ratio
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