專(zhuān)有協(xié)議可以降低簡(jiǎn)單傳感器網(wǎng)絡(luò)的成本嗎？

　　行業(yè)標(biāo)準(zhǔn)，如ZigBee放大器和藍(lán)牙智能是最知名的協(xié)議目前正在設(shè)計(jì)成智能生活和家庭自動(dòng)化設(shè)備，如照明和暖氣控制，計(jì)量，安全和安全系統(tǒng)。然而，其他選項(xiàng)可供設(shè)計(jì)師，包括一些專(zhuān)有的協(xié)議，可以提供優(yōu)勢(shì)，如更短的學(xué)習(xí)曲線，成本較低，功耗低，適合電池供電的家電。

　　專(zhuān)有的無(wú)線協(xié)議中，德克薩斯儀器SimpliciTI?是一個(gè)簡(jiǎn)單的協(xié)議設(shè)計(jì)的小型RF網(wǎng)絡(luò)具有低數(shù)據(jù)速率和低功耗的要求，需求。它的目的是支持對(duì)等拓?fù)浣Y(jié)構(gòu)，使用接入點(diǎn)（AP）在一對(duì)一的連接，或作為一個(gè)星形拓?fù)涞?a target='_blank' class='arckwlink_none'>中心。因此，SimpliciTI是被設(shè)計(jì)來(lái)分享傳感器數(shù)據(jù)如占用系統(tǒng)的有力競(jìng)爭(zhēng)者，光和/或溫度控制的智能照明信息。它還可以支持通信設(shè)備，如射頻遙控器，包括車(chē)庫(kù)門(mén)開(kāi)啟器，以及智能儀表，安全設(shè)備，如氣體傳感器和煙霧探測(cè)器，安全傳感器，以及各種其他設(shè)備

　　SimpliciTI has some important attractions for embedded designers. For one， the network protocol is provided as source code under a free license without royalties. It also imposes minimal demand for system resources， requiring less than 8KB of Flash and 1KB of RAM depending on configuration. At the same time， however， it allows versatile network topologies suitable for connecting various types of devices such as sensors， actuators and RF tags， thereby enabling designers to fulfill numerous use cases. By supporting direct device-to-device communication， as well as simple star topologies using an AP capable of storing and forwarding messages， it has capabilities similar to those of Bluetooth Smart. In addition， by also allowing range extenders， SimpliciTI provides some of the attractive features of mesh networking protocols such as ZigBee or the forthcoming standardized Bluetooth mesh. The range is allowed to be extended up to four hops using these extenders. Figure 1 shows how SimpliciTI peers， APs and range extenders are able to support a wide range of smart-building or home-automation tasks as part of a wireless sensor network.