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干貨分享:深度解析LORA無線通信技術
DATE:2018-05-19 8:38:19

摘要:物聯網的快速發展對通信技術提出了更高的要求,尤其是對于具有低寬帶、低功耗、遠距離、大量連接的物聯網應用而設計的無線通信技術LPWAN,而其中的代表就是LORA和NB-IOT,NB-IOT在之前的文章中有詳細的解析,今天我們重點講講LORA。


博牛社区   WULIANWANGDEKUAISUFAZHANDUITONGXINJISHUTICHULEGENGGAODEYAOQIU,YOUQISHIDUIYUJUYOUDIKUANDAI、DIGONGHAO、YUANJULI、DALIANGLIANJIEDEWULIANWANGYINGYONGERSHEJIDEWUXIANTONGXINJISHULPWAN(DIGONGHAOGUANGYUWANG),ERQIZHONGDEDAIBIAOJIUSHILORAHENB-IOT,NB-IOTZAIZHIQIANDEWENZHANGZHONGYOUXIANGXIDEJIEXI,JINTIANWOMENZHONGDIANJIANGJIANGLORA。

  LORA是什么?

  LORASHILPWANTONGXINJISHUDEYIZHONG,SHIMEIGUOSemtechGONGSICAIYONGHETUIGUANGDEYIZHONGJIYUKUOPINJISHUDECHAOYUANJULIWUXIANCHUANSHUFANGAN,ZHEYIFANGANGAIBIANLEYIWANGGUANYUCHUANSHUJULIYUGONGHAODEZHEZHONGKAOLVFANGSHI,WEIYONGHUTIGONGYIZHONGJIANDANDENENGSHIXIANYUANJULI、CHANGDIANCHISHOUMING、DARONGLIANGDEXITONG,JINERKUOZHANCHUANGANWANGLUO。MUQIANLORAZHUYAOZAIQUANQIUMIANFEIPINDUANYUNXING,BAOKUO433868915MHzDENG。

  LORA的特點

  JUYOUYUANJULI、DIGONGHAO(DIANCHISHOUMINGCHANG)、DUOJIEDIAN、DICHENGBENDETEXING。

  LORAWAN的網絡架構

  LORAWANWANGLUOZHUYAOYOUZHONGDUAN(KENEIZHILORAMOKUAI)、WANGGUAN(HUOJIZHAN)、ServerHEYUNSIBUFENZUCHENG。

  LORAWANWANGLUOJIAGOUSHIYIGEDIANXINGDEXINGXINGTUOPUJIEGOU,ZAIZHEGEWANGLUOJIAGOUZHONG,LORAWANGGUANSHIYIGETONGMINGDEZHONGJI,LIANJIEQIANDUANZHONGDUANSHEBEIHEHOUDUANZHONGYANGFUWUQI。WANGGUANFUWUQITONGGUOBIAOZHUNIPLIANJIE,ERZHONGDUANSHEBEICAIYONGDANTIAOYUYIGEHUODUOGEWANGGUANTONGXIN,SUOYOUDEJIEDIANJUNWEISHUANGXIANGTONGXIN。

  KEYIKANDAOYIGELORAWANWANGLUOJIEGOUZHONGBAOHANLEZHONGDUAN、JIZHAN、NS、YINGYONGFUWUQIZHESIBUFEN,JIZHANHEZHONGDUANZHIJIANCAIYONGXINGXINGWANGLUOTUOPU,YOUYULORADECHANGJULITEXING,TAMENZHIJIANDEYISHIYONGDANTIAOCHUANSHU。ZAIZHONGDUANBUFENGUANFANGLIECHULELIUGEDIANXINGYINGYONG,NIHUIFAXIANZHONGDUANJIEDIANKEYITONGSHIFAGEIDUOGEJIZHAN,JIZHANZEDUINSHEZHONGDUANZHIJIANDELORAWANXIEYISHUJUZUOZHUANFACHULI,JIANGLORAWANSHUJUFENBIECHENGZAIZAILELORASHEPINCHUANSHUHETCP/IPSHANG。

  LORA的優勢

  1.改善了接收的靈敏度,降低了功耗

  GAODA157dbDELIANLUYUSUANSHIQITONGXINJULIKEDA15GONGLI(YUHUANJINGYOUGUAN)。QIJIESHOUDIANLIUJIN10mA,SHUIMIANDIANLIU200nA,ZHESHIDEDIANCHIDESHIYONGSHOUMINGDEDAOYANCHANG。

  2.基于該技術的網關/集中器支持多信道多數據的并行處理,系統容量大

  RULORAWANDEWANGLUOJIAGOUTUSUOSHI,WANGGUANSHIJIEDIANYUIPWANGLUOZHIJIANDEQIAOLIANG(TONGGUO2G/3G/4GHUOZHEEthernet)。MEIGEWANGGUANMEITIANKEYICHULI500WANCIGEJIEDIANZHIJIANDETONGXIN(JIASHEMEICIFASONG10Bytes,WANGLUOZHANYONGLV10%),RUGUOBAWANGGUANANZHUANGZAIXIANYOUYIDONGTONGXINJIZHANDEWEIZHI,FASHEGONGLV20dB(100mW),NEIMEZAIJIANZHUMIJIDECHENGSHIHUANJINGKEYIFUGAI2GONGLIZUOYOU,ERZAIMIDUJIAODIDEJIAOQU,FUGAIFANWEIKEDA10GONGLI。

  3.基于終端和集中器/網關的系統可以支持測距和定位

  LORADUIJULIDECELIANGSHIJIYUXINHAODEKONGZHONGCHUANSHUSHIJIANERFEICHUANTONGDERSSI。ERDINGWEIZEJIYUDUODIAN(WANGGUAN)DUIYIDIAN(JIEDIAN)DEKONGJIANCHUANSHUSHIJIANCHADECELIANG。QIDINGWEIJINGDUKEDA5m(JIASHE10KmDEFANWEI)。

  ZHEXIEGUANJIANTEZHENGSHIDELORAJISHUFEICHANGSHIYONGYUYAOQIUDIGONGHAO、JULIYUAN、DALIANGLIANJIEYIJIDINGWEIGENZONGDENGDEWULIANWANGYINGYONG,RUZHINENGCHAOBIAO、ZHINENGTINGCHE、CHELIANGZHUIZONG、CHONGWUGENZONG、ZHIHUINONGYE、ZHIHUIGONGYE、ZHIHUICHENGSHI、ZHIHUISHEQUDENGYINGYONGHELINGYU。

  LORA與NB-IOT之間的糾葛

  SUIZHUNB-IOTBIAOZHUNDEXINGQI,BEISHOUZHUMUDENB-IOTGUIMOHUASHANGYONGDEJICHUZHONGYULUOSHI,ERZUOWEITONGSHIDIGONGHAOGUANGYUWANGJISHUZHIYIDELORAGENGSHIYIDUWEICHUANCHU“NB-IOTJIANGDAOZHILORAXIAOWANG”DEGUANDIAN。

  而事實真是如此嗎?

博牛社区   CONGJISHUSHANGKAN,LIANGZHEZHIJIANBINGMEIYOUTAIDADEYOULIEZHIFEN,CONGYINGYONGFANWEISHANGLAIKAN,LIANGZHEQISHIHENDUODOUSHIYIYANGDE,QUBIEZAIYU:NB-IOTCAIYONGDESHIYUNYONGSHANGTONGYIBUSHUFUGAIQUANGUODEWANGLUOJINXINGSHOUFEIYUNYINGDEFANGSHI,ERLORAZEKEYIRANGQIYEDAJIANSHUYUZIJIDEWANGLUOSHIXIANYEWUYUNYING。SUIRANNB-IOTSHOUDAOLEYUNYINGSHANGDEQIANGLIZHICHI,DANSHIZHEBINGBUDAIBIAOLORAJIUHUIBEIQINGYIQUDAI。

博牛社区   LORAXIANGDUINB-IOTDEHAOCHIJIUSHIYIJINGYOUCHENGSHUDESHANGYONG,ERNB-IOTCAIGANGGANGKAISHI,LORAHENB-IOTSUIRANZAIYINGYONGSHANGKENENGHUIYOUHENDUODEZHONGDIE,BUGUONB-IOTSHIYOUYUNYINGSHANGLAIZHUDAO,YAOYONGDAOYUNYINGSHANGDEWANGLUO,XUYAOXIANJIANGSHUJUTIJIAODAOYUNYINGSHANGNEILI,XUDUOQIYEHUOXUBUYUANYIBAZIJIDESHUJUGEIBIEREN,SUOYIZHEXIEQIYEHUIXUANZEBUSHUZIJIDESIYOUWULIANWANGLUO。


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