將無(wú)線(xiàn)功率范圍和數(shù)據(jù)吞吐量與應(yīng)用程序需求相匹配

　　在今天的產(chǎn)品場(chǎng)景中，無(wú)論產(chǎn)品是面向消費(fèi)者部門(mén)還是專(zhuān)業(yè)環(huán)境，有線(xiàn)連接常常被視為“去年的事情”。消費(fèi)者希望他們的產(chǎn)品能夠無(wú)線(xiàn)連接，并且透明地做到這一點(diǎn)，而不會(huì)打擾用戶(hù)的安裝問(wèn)題。

　　在最近一次對(duì)設(shè)計(jì)工程師的調(diào)查中，他們期望在他們的規(guī)格中包含的主要無(wú)線(xiàn)標(biāo)準(zhǔn)，即要求任何形式的無(wú)線(xiàn)接口的產(chǎn)品，都是Wi-Fi。這符合建立“物聯(lián)網(wǎng)”（“物聯(lián)網(wǎng)”）的趨勢(shì)；除了利用無(wú)線(xiàn)解決方案來(lái)實(shí)現(xiàn)該鏈接之外，產(chǎn)品還可以獲得自己的IP地址。即使他們不是，在立即實(shí)施，完全加入物聯(lián)網(wǎng)，產(chǎn)品是未來(lái)的證明，準(zhǔn)備加入任何更廣泛的網(wǎng)絡(luò)解決方案出現(xiàn)在連續(xù)的更新和升級(jí)。

　　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.