A Hierarchical Polling-based MAC Scheme for Wireless Body Sensor Network
نویسنده
چکیده
A hierarchical polling-based access scheme for Wireless Body Sensor Network (WBSN) is proposed in this paper. The proposed access scheme is structured in hierarchy to collect data from sensor nodes inserted in human body. In first level of hierarchy the sensor nodes are divided into groups and sensor nodes of each group communicate with a sink node which collects data by using polling technique. In second level, the sink nodes communicate with a master node which collects data by also using polling technique. To study the performance of proposed scheme, two cases are considered. In the first case, the sensor nodes from first level are provided with only single buffer to store data and the sink nodes have infinite size buffers. The master node in this case uses exhaustive polling technique. In the second case, the sensor nodes and sink nodes are provided with infinite size buffers and both first and second levels use exhaustive polling technique. The study is carried out using mathematical models known in the literature. The numerical analyses show that the proposed scheme can be efficient for WBSN application. Keywords—body sensor network, MAC, mathematical modeling, polling, wireless.
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