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Abstract
The rapid developments of sensor devices that can actively monitor human activities have given rise to a new field called wireless body area network (BAN). A BAN can manage devices in, on and around the human body. Major requirements of such a network are energy efficiency, long lifetime, low delay, security, etc. Traffic in a BAN can be scheduled (normal) or event-driven (emergency). Traditional media access control (MAC) protocols use duty cycling to improve performance. A sleep-wake up cycle is employed to save energy. However, this mechanism lacks features to handle emergency traffic in a prompt and immediate manner. To deliver an emergency packet, a node has to wait until the receiver is awake. It also suffers from overheads, such as idle listening, overhearing and control packet handshakes. An external radio-triggered wake up mechanism is proposed to handle prompt communication. It can reduce the overheads and improve the performance through an on-demand scheme. In this work, we present a simple-to-implement on-demand packet transmission scheme by taking into considerations the requirements of a BAN. The major concern is handling the event-based emergency traffic. The performance analysis of the proposed scheme is presented. The results showed significant improvements in the overall performance of a BAN compared to state-of-the-art protocols in terms of energy consumption, delay and lifetime.
Highlights
Recent advances in wireless, pervasive and ubiquitous information and communication technologies (ICT) have enabled sensor devices to safely operate on and around the human body
The performance results for emergency traffic are presented
Our aim was to check possible scenarios ranging from a few emergency events per day to a large number of events reported by several BNs within a very short time
Summary
Pervasive and ubiquitous information and communication technologies (ICT) have enabled sensor devices to safely operate on and around the human body. These devices monitor the body functions and the surrounding environment. A network of such devices is known as a body area network (BAN) [1,2]. A BAN has great potential to improve the quality of a personal healthcare system. It can provide cost-effective, portable and reliable healthcare services. The seamless integration of different systems and applications provides improved quality of life [3]. The applications of a BAN [4] cover both medical and non-medical fields
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