将无线功率范围和数据吞吐量与应用程序需求相匹配

　　将无线功率范围和数据吞吐量与应用程序需求相匹配

　　在今天的产品场景中，无论产品是面向消费者部门还是专业环境，有线连接常常被视为“去年的事情”。消费者希望他们的产品能够无线连接，并且透明地做到这一点，而不会打扰用户的安装问题。

　　在最近一次对设计工程师的调查中，他们期望在他们的规格中包含的主要无线标准，即要求任何形式的无线接口的产品，都是Wi-Fi。这符合建立“物联网”（“物联网”）的趋势；除了利用无线解决方案来实现该链接之外，产品还可以获得自己的IP地址。即使他们不是，在立即实施，完全加入物联网，产品是未来的证明，准备加入任何更广泛的网络解决方案出现在连续的更新和升级。

　　But the wireless Ethernet connection is only one solution in a hierarchy of wireless connectivity standards and， in terms of bandwidth available from commonly implemented standards， it sits at the high end of the list. Radio links using IEEE 802.11a/b/g or /n can reach nominal speeds of 54 Mbps or even higher. Actual throughput in terms of data payload will be somewhat less， but even allowing for that fact， there are many applications that require only a fraction of that performance. For lower data rates， and lower power， there is Bluetooth. At the lower end of the connectivity spectrum sit the unpowered （or rather， powered over-the-air） technologies of near-field communications （NFC）; and between those points lies a host of solutions which aim to minimize their power demand while continuing to provide data throughput in the region of 1 or 2 Mbps. These encompass the Bluetooth Low-Energy standard， the ANT+ solution from ANT Wireless， the low-power IP standard 6LoWPAN， the optimized-for-remote-controls RF4CE standard， and more. In this space sit the many standards for mesh networking， such as ZigBee， that use the IEEE 802.15.4 radio specification， or a variant of it.