Nodes in a body area network (BAN) are miniature wearable or implantable battery-powered wireless sensors which continuously transmit real-time vital physiological data of a patient to remote health-care center while remaining in close proximity to the human body. Therefore, BAN nodes should have the features of high data rates and low transmit powers to protect the human body, environment and bio-medical equipment from harmful exposure of electromagnetic radiations and electromagnetic interference (EMI). Ultra-wideband (UWB) signals have low allowable transmission power and high data rates. Therefore, we propose a low cost, low powered and secure optical body area network (OBAN) composed of four UWB-BAN nodes each transmitting at a data rate of 30 Mbps. At the control node, UWB signals from UWB-BAN nodes are encoded using spectral amplitude coding-optical code division multiple access (SAC-OCDMA) scheme and the combined signal is transmitted over free space optics (FSO) channel towards remote health-care center. At the health-care center, the combined signal is decoded and UWB signal of each UWB-BAN node is photo-detected for analysis of patient’s data. Log-normal channel model is considered between control node and the health-care center. The signal received from each UWB-BAN after propagation through the FSO channel is analyzed through Bit error rate (BER) results. Similarly, cost efficiency of the proposed architecture is also evaluated through a detailed cost analysis. It was observed that the proposed architecture requires the UWB-BAN nodes to have low receiver sensitivities with the added benefits of cost-efficiency and data security.

体域网 (BAN) 中的节点是微型可穿戴或可植入电池供电的无线传感器，可将患者的实时重要生理数据持续传输到远程医疗保健中心，同时与人体保持密切联系。因此，BAN 节点应具有高数据速率和低传输功率的特性，以保护人体、环境和生物医疗设备免受电磁辐射和电磁干扰（EMI）的有害暴露。超宽带 (UWB) 信号具有低允许传输功率和高数据速率。因此，我们提出了一种低成本、低功耗和安全的光学体域网络 (OBAN)，由四个 UWB-BAN 节点组成，每个节点以 30 Mbps 的数据速率传输。在控制节点，来自 UWB-BAN 节点的 UWB 信号使用频谱幅度编码-光码分多址 (SAC-OCDMA) 方案进行编码，组合信号通过自由空间光学 (FSO) 信道传输到远程医疗保健中心。在保健中心，对组合信号进行解码，并对每个 UWB-BAN 节点的 UWB 信号进行光检测，以分析患者数据。控制节点和保健中心之间考虑对数正态通道模型。通过 FSO 信道传播后从每个 UWB-BAN 接收的信号通过误码率 (BER) 结果进行分析。同样，还通过详细的成本分析来评估所提出架构的成本效率。