射頻與藍(lán)牙的比較

　　隨著無線技術(shù)進(jìn)入人類界面設(shè)備（HID）市場，越來越多的尖端HID產(chǎn)品在市場上推出了集成無線技術(shù)（無線鍵盤、無線鼠標(biāo)等）。通常，開發(fā)者的選擇是有限的：遵循一個流行的無線標(biāo)準(zhǔn)，比如藍(lán)牙，或者為他們的應(yīng)用開發(fā)一個專有協(xié)議。雖然無線標(biāo)準(zhǔn)提供了互操作性的好處，但它們也引入了應(yīng)用程序可能不需要的復(fù)雜性和開銷，從而導(dǎo)致更高的系統(tǒng)成本。另一方面，專有協(xié)議為開發(fā)人員提供了定制應(yīng)用程序的靈活性，而代價是要求開發(fā)人員承擔(dān)開發(fā)過程。

　　The key RF requirements for selecting a PC HID are cost （the PC HID market is extremely cost sensitive）， security， range， power consumption， latency， interference， co-location， and ease of use. In general， standards win in the market because of interoperability of the devices. However， in the case of PC HIDs until 2009， only proprietary protocols have dominated the market. This can be attributed to the lack of any wireless standard optimized for the PC HID market in terms of cost， power and efficiency. With the advent of Bluetooth Low Energy Wireless technology aimed at low power applications， we can foresee a new wireless standard occupying the PC HID market. This article compares the Bluetooth 4.0 Wireless technology with the proprietary protocols in the HID market.