Abstract
Wireless body area networks (WBANs) are severely energy constrained, and how to improve the energy efficiency so as to prolong the network lifetime as long as possible is one of the most important goals of WBAN research. Low data-rate WBANs are promising to cut down the energy consumption and extend the network lifetime. Considering the characteristics and demands of low data-rate WBANs, a low duty-cycling medium access control (MAC) protocol is specially designed for this kind of WBAN in this paper. Longer superframes are exploited to cut down the energy consumed on the transmissions and receptions of redundant beacon frames. Insertion time slots are embedded into the inactive part of a superframe to deliver the frames and satisfy the quality of service (QoS) requirements. The number of the data subsections in an insertion time slot can be adaptively adjusted so as to accommodate low data-rate WBANs with different traffic. Simulation results show that the proposed MAC protocol performs well under the condition of low data-rate monitoring traffic.
Highlights
The rapid rises of the aging population and healthcare costs have been two major challenges that modern societies have to face
TDMA is exploited by these protocols to handle busy traffic to avoid collisions and cut down the energy consumption, and CSMA/CA is adopted to deal with traffic incurred by random events and network commands such as time slot request, time slot release, node associate request, node disassociated release, etc. [29]
Scheme and an LDC-medium access control (MAC) scheme, even with different GN values, their average powers are basically the same if they uses the same I N. This shows that dividing nodes into groups is not energy efficient when the Wireless body area networks (WBANs) is under very low traffic
Summary
The rapid rises of the aging population and healthcare costs have been two major challenges that modern societies have to face. Compared to the high data-rate monitoring mode, a low data-rate WBAN only delivers data to the coordinator when some abnormal conditions are detected As a result, it cannot provide enough detailed information for the medical staff to trace the patient’s health in the long run in detail, but it still can afford proactive wellness management, including early detection and prevention of diseases. In order to extend the network lifetime, a WBAN should stay in low data-rate monitoring mode as much as possible This is hoped to provide a meaningful and potential energy management method for severely energy-constrained WBANs [9]. With the help of an adequate MAC protocol, the duty cycle of a low data-rate WBAN node can be compressed effectively to reduce the energy consumption, which means a significantly extended network lifetime [12].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
