NINT-71C
采用線性擴(kuò)頻調(diào)制技術(shù),其通信距離可達(dá) 15km 以上,空曠地方甚至更遠(yuǎn)。相比其他廣域低功耗物聯(lián)網(wǎng)技術(shù)(如 Sigfox),LoRa 終端節(jié)點(diǎn)在相同的發(fā)射功率下可通信的距離會更遠(yuǎn)。?SigoxSigfox 有雙向通信功能,通信往往是從終端到基站向上傳送比較容易,但從基站回到終端其性能是受限制的,這是因?yàn)榻K端上的接收靈敏度不如基站。但從技術(shù)上看,SigFox 具有成本低、功耗低的特點(diǎn)。?NB-IoTNB-IoT的部署方式較為快捷、靈活,支持3種部署場景。NB-IoT 單扇區(qū)支持5萬個(gè)連接,比現(xiàn)有網(wǎng)絡(luò)連接數(shù)高50倍。它的基站覆蓋范圍廣,終端以低于 2G 的功率即可接入網(wǎng)絡(luò);維持網(wǎng)絡(luò)接入的開銷減少;終端工作在低功耗模式下,如采用節(jié)能模式可使得99%的時(shí)間里功耗只需15微瓦。傳感器是如何實(shí)現(xiàn)IOT(物聯(lián)網(wǎng))的呢?把限位開關(guān)、壓力開關(guān)等...之類的傳感器連到一個(gè)無線的網(wǎng)絡(luò)端口,它內(nèi)置有一個(gè)電池。當(dāng)你傳感器動(dòng)作,就通過互聯(lián)網(wǎng)協(xié)議傳輸走了客戶可以下載應(yīng)用程序安裝在手機(jī)、工控機(jī)、電腦上,遠(yuǎn)程獲取所有信息,包括開關(guān)狀態(tài),電池所剩電量.....因?yàn)楣姆浅5停诋a(chǎn)品壽命期內(nèi)不需要更換電池。?
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