Abstract
Harvesting energy in the human environment has been identified as an effective way to charge the body sensor nodes in wireless body area networks (WBANs). In such networks, the capability of the nodes to detect events is of vital importance and complements the stringent quality of service (QoS) demands in terms of delay, throughput, and packet loss. However, the scarce energy collected by human motions, along with the strict requirements of vital health signals in terms of QoS, raises important challenges for WBANs and stresses the need for new integrated QoS-aware energy management schemes. In this paper, we propose a joint power-QoS (PEH-QoS) control scheme, composed of three modules that interact in order to make optimal use of energy and achieve the best possible QoS. The proposed scheme ensures that a sensor node is able to detect the medical events and transmit the respective data packets efficiently. Extensive simulations, conducted for different human activities (i.e., relaxing, walking, running, and cycling), have shown that the application of PEH-QoS in a medical node increases the detection efficiency, the throughput, and the energy efficiency of the system.
Highlights
W IRELESS Body Area Networks (WBANs) face several challenges that should be overcome before their f nal implementation in telemedicine systems
We introduce a Power-Quality of Service (QoS) control scheme (PEH-QoS), designed for Body Nodes (BNs) operated by Human Energy Harvesting (HEH)
We have developed an event-driven MATLAB simulator that implements our algorithm in a HEH-WBAN formed by a Body Node Coordinator (BNC) and one BN.3
Summary
W IRELESS Body Area Networks (WBANs) face several challenges that should be overcome before their f nal implementation in telemedicine systems. The scarce energy collected by human motions, along with the strict requirements of vital health signals in terms of QoS, raise important challenges for WBANs. many works on sensor networks study the QoS aspects of the communication [11], [12], significan research effort ([13]–[16]) has been recently devoted to the design of schemes that focus on the communication, taking into account the energy harvesting conditions in the network. Many works on sensor networks study the QoS aspects of the communication [11], [12], significan research effort ([13]–[16]) has been recently devoted to the design of schemes that focus on the communication, taking into account the energy harvesting conditions in the network Despite their novelty, the aforementioned works focus on specifi parameters and metrics (e.g., packet loss, event detection, etc.), neglecting the need for holistic approaches that respect all the applications requirements in WBANs
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