將無線功率范圍和數據吞吐量與應用程序需求相匹配

　　在今天的產品場景中，無論產品是面向消費者部門還是專業環境，有線連接常常被視為“去年的事情”。消費者希望他們的產品能夠無線連接，并且透明地做到這一點，而不會打擾用戶的安裝問題。

　　在最近一次對設計工程師的調查中，他們期望在他們的規格中包含的主要無線標準，即要求任何形式的無線接口的產品，都是Wi-Fi。這符合建立“物聯網”（“物聯網”）的趨勢；除了利用無線解決方案來實現該鏈接之外，產品還可以獲得自己的IP地址。即使他們不是，在立即實施，完全加入物聯網，產品是未來的證明，準備加入任何更廣泛的網絡解決方案出現在連續的更新和升級。

　　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.