低功耗無線技術(shù)比較

　　這篇文章比較了藍(lán)牙低能量，螞蟻，螞蟻+，ZigBee，ZigBee RF4CE，Wi-Fi，耐克+，IrDA，和近場(chǎng)通信（NFC）標(biāo)準(zhǔn)，細(xì)化的特點(diǎn)，利益，和在各種應(yīng)用中，每個(gè)協(xié)議的不足之處。

　　隨著超低功耗無線芯片組的引入，許多創(chuàng)新性的新應(yīng)用正在成為可能。直到最近，在傳感器和客戶端之間實(shí)現(xiàn)數(shù)據(jù)傳輸?shù)奈ㄒ环椒ㄊ鞘褂秒娋€，或者手動(dòng)從日志設(shè)備收集數(shù)據(jù)。無線技術(shù)已經(jīng)幾十年了。然而，他們傾向于使用大量的電力，需要專門的設(shè)備來建立通信。

　　大多數(shù)目標(biāo)市場(chǎng)的特點(diǎn)是在傳感器節(jié)點(diǎn)和中心設(shè)備之間周期性地傳遞少量傳感器信息。一些確定的最終產(chǎn)品，可能實(shí)現(xiàn)低功耗無線電系統(tǒng)包括手機(jī)，健康和健身設(shè)備，家庭自動(dòng)化，供暖，通風(fēng)，空調(diào)（HVAC），遙控器，游戲，人機(jī)接口設(shè)備（HID），智能儀表，付款，和許多其他。

　　These applications are all constrained by the following critical key requirements： ultra-low-power， low cost， and physical size.

　　The ultra-low-power requirement is mainly due to the need of targeted devices to operate for extended periods of time from coin cells or energy scavenger technology. Apart from the obvious advantages of a low chipset cost， overall product expense is largely affected by the power source. For example， if a shopping mall has a wireless beacon in every shop and batteries need replacing regularly， the maintenance cost will soon outweigh the advantages of such a technology being deployed.

　　This article analyzes the pros and cons of various low-power wireless technologies and leaves it up to the reader to decide which technology is most suitable for their intended product.