如何设计无线个人区域网络用于医疗和消费应用

　　如何设计无线个人区域网络用于医疗和消费应用

　　超低功耗的2.4 GHz的个人区域网络应用如医疗、运动监测扩大协议范围，从低功耗蓝牙和ZigBee 802.15.4j标准专有协议如该。本文阐述了如何在蓝牙设备如剑桥硅无线和德克萨斯仪器CC2540的csr1000可用于医疗和消费设计，以及Atmel的at86rf231实施和飞思卡尔半导体MC13224为ZigBee和该网络。

　　现有的、经过验证的技术的变化正在出现，以应对医疗和消费者使用的超低功率、短程无线网络的挑战。成熟的ZigBee 802.15.4标准已被修改以支持在2.35医疗应用的2.40 GHz频带，毗邻现有的2.4 GHz的免执照频段。新的蓝牙低能量协议的单芯片设备正在开辟新的机会，将医疗设备和其他消费设备与移动电话相连接，以提供类似的个人区域网络功能。

　　医疗体域网（MBAN）是一个个人区域网络的关键技术，并对ZigBee的物理层和MAC层的802.15.4j修改在2013年2月被批准。这提供了相同的健壮、低功耗的网状网络协议，在美国略有不同的频率扩展，以避免拥挤的无执照频谱，并提供更多的可靠性和系统的鲁棒性，从2013年6月起。

　　Here the design requirements are less about the data rate and more about the power consumption and cost. Being able to implement a PAN （personal area network） or MBAN with devices that can run for weeks， months， or even years from a single-cell battery is a key aim. 802.15.4j allows devices to operate with lower power as re-transmission of packets is reduced and the shorter range means less power is needed for a link. The mesh networks mean that adjacent devices can be used to carry data across the network， further shortening the link distance and reducing the overall power consumption if there are several sensors across the body. These do， however， need a hub device to control access to the network and to collect data to link to the Internet via networks such as Wi-Fi or a cellular phone. However， the existing ZigBee protocol is also highly applicable to these wearable， personal networks with a low-cost， robust approach.