National Institute of Technology, Kozhikode, India.
J Med Syst. 2017 Sep 30;41(11):179. doi: 10.1007/s10916-017-0825-1.
It is of utmost importance to conserve battery energy to the maximum possible extent in WBAN nodes while collecting and transferring medical data. The IEEE 802.15.6 WBAN standard does not specify any method to conserve energy. This paper focuses on a method to conserve energy in IEEE 802.15.6 WBAN nodes when using CSMA/CA, while simultaneously restricting data delivery delay to the required value as specified in medical applications. The technique is to allow the nodes to sleep all the times except for receiving beacons and for transmitting data frames whenever a data frame enters an empty buffer. The energy consumed by the nodes and the average latency of data frame for periodical arrival of data are found out analytically. The analytical results are validated and also the proposed method is compared with other energy conserving schemes, using Castalia simulation studies. The proposed method shows superior performance in both device lifetime and latency of emergency medical data.
在采集和传输医疗数据时，最大限度地节约 WBAN 节点的电池能量至关重要。IEEE 802.15.6 WBAN 标准并未指定任何节能方法。本文主要研究在使用 CSMA/CA 时如何在 IEEE 802.15.6 WBAN 节点中节能，同时将数据传输延迟限制在医疗应用中规定的所需值内。该技术是允许节点在除接收信标和传输数据帧之外的所有时间内休眠，只要数据帧进入空缓冲区，就传输数据帧。通过分析得出节点的能耗和数据帧的平均延迟。使用 Castalia 仿真研究对分析结果进行验证，并将所提出的方法与其他节能方案进行比较。所提出的方法在设备寿命和紧急医疗数据的延迟方面都表现出了优异的性能。
