浙江11选5开奖结果查询

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NB-IoT和LoRa的未来解决方案

2019-04-28

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  作为低功率广域网(LPWAN)的可能实现,长距离(LoRa)技术被认为是物联网(IoT)的未来无线通信标准,因为它提供竞争性功能,例如长期通信范围,低成本和低功耗,使其成为当前无线传感器网络和传统蜂窝技术的最佳替代方案。但是,LoRa中可用于物理层调制的有限带宽使其不适合从图像传感器等设备进行高比特率数据传输。可以在节点到节点网络模型中通过LoRa物理层(PHY)传输图像传感器数据。在实施这种方法时,我们提出了一种克服LoRa带宽限制的新方案。利用该方案,由传感器收集的需要高数据速率传输的图像被加密为十六进制数据,然后被分成用于通过LoRa物理层(PHY)传输的分组。为了评估使用该方案传输的图像质量,我们测量了丢包率,峰值信噪比(PSNR)和每个图像的结构相似性(SSIM)索引。这些测量验证了所提出的图像传输方案,并支持工业和学术趋势,促使LoRa成为物联网基础设施的未来解决方案。

  无线遥感(WSN)技术在低功率,高速和长距离传输数据方面的能力各不相同。今天,低功耗广域网(LPWAN)是理想的WSN技术,因为它们具有扩展的覆盖范围,低成本和节能特性可以不需要通信。基础设施使它们成为短距离的补充无线技术,如Wi-Fi和蓝牙低功耗,以及蜂窝技术的可靠替代品,用于城市规模的物联网(IoT)应用。这种能够以低成本和有限的功耗与数千个器件(星形拓扑)进行远程通信的能力是由于工作循环和网络协议的改进。长距离(LoRa),窄带物联网(NB-IoT浙江11选5开奖结果查询),IEEE 802.15.4,Sigfox和LTE-M是(IoT)应用程序用于连接无线传感器以扩展物联网部署和降低功率的最新LPWAN技术示例消费。

  LPWANZUIZHONGYAODETEXINGZHIYISHINENGGOUTONGGUOSUOXIAOQIDAIKUANHUOTONGGUOZAIGENGKUANDEPINLVFANWEINEIKUOZHANXINHAODENENGLIANGLAIZENGQIANGJIESHOUQIDEXINZAOBI(SNR)。LIRU,ZAINB-IoTZHONG,JIANGDAIKUANSUOXIAODAOXIAOYU25 kHzHUIZENGJIASNRBINGZENGQIANGSHOUFAQIDEXINGNENG。DANGDAIKUANJIANXIAODAODAYUE100HzSHI,SigfoxKEYICHANSHENGLEISIDEXIAOGUO。LIYONGLoRa,SUOXIAOJIESHOUJIDEDAIKUANKEYIJIEMAXINHAOFUDUBIZAOSHENGJIDIDI19.5 dBDECHUANSHU,CONGERSHIXIANBIQITAJISHUGENGZHANGJULIDETONGXIN。YULoRaJINXINGYUANCHENGTONGXINDENENGLISHIQICHENGWEIGAOJIWULIANWANGYINGYONGDEWEILAIWANGLUOJICHUSHESHI,YINWEITAKEYIJIANGSHUBAIGEWULIANWANGZHONGDUANSHEBEILIANJIEDAOYIGEWANGGUAN,BINGQIEBUXUYAOTESHUYAOQIUJIKELIANJIEDAOQITAXIANYOUWANGLUO。ZAIBENWENZHONG,WOMENZHANSHILELoRaZAIWSNZHONGDESHOUCIYINGYONG,YONGYUCHUANSHUYOUTUXIANGCHUANGANQIBUHUODEHONGSHULINTUXIANG,BINGYONGYUMALAIXIYASabak BernamDIQUDEHONGSHULINJIANCE。MUQIANAILIXINGONGSIDEGPP(2G / 3G)JISHU。YONGYUTONGGUODUQUTURANGSHIDU,YANWU,HAIPINGMIANCELIANGHEWENDUCHUANGANQIDESHUJULAIJIANCEHONGSHULINDEZHUANGKUANG。SUIHOU,ZHEIXIESHUJUBEIZHUANYIDAOSHEQUZHONGXINBINGJINXINGCHULI,YIZHIDINGFANGZHIHONGSHULINTUIHUADEZHANLVE。JIANGLoRaZUOWEIDAIYOUTUXIANGCHUANGANQIDEWSNSHOUCIYINGYONGYUCIQUYUJIANGYOUZHUYUHUANJINGJIANCEGUOCHENG,TAJIANGYOUZHUYUZENGJIALPWANGONGNENG,JIANGDIGONGHAO(DUONIANLAIYOUDIANCHIGONGDIAN),ANZHUANGCHENGBEN(WUXUANZHUANG)DUIYUGENGANGGUIDESHEBEI)BINGZENGJIACHUANSHUSHUJUDEFANWEI。

浙江11选5开奖结果查询  ZUIJINGUANYULoRaWANGLUODEDADUOSHUYANJIUDOUJIZHONGZAIQIHUWAIXINGNENGHEFUGAIFANWEISHANG。ZHIDEZHUYIDESHI,LoRaZHENGMINGTAKEYIZAICHENGSHIYINGYONGHEHAISHANGYINGYONGZHONGTIGONGCHAOGUOYIBANDE5-10GONGLIFANWEIDESHUJUBAO。YIXIEYANJIUBIAODALEDUILoRaWANGLUOSHANGDETUXIANGCHUANSHUDEGUANZHU,YINWEITUXIANGXUYAODALIANGDEBITEBINGQIEZAICHUANSHUCAOZUOZHONGXIAOHAOGENGDUODENENGLIANG。

浙江11选5开奖结果查询  JUWOMENSUOZHI,QIJINWEIZHIHAIMEIYOUQITAYANJIUCESHIHONGSHULINQUYUTUXIANGCHUANSHUZHONGDELoRaWULICENG(PHY)GONGNENG。ZHEISHIYINWEITADEZHANGJULINENGLIHUIYINGXIANGDAIKUAN,ERDAIKUANBEIRENWEISHICHUANSHUTUXIANGHEDUOMEITISHUJUDEYIDAZHANGAI。JINGUANDANGQIANSHISHIDEDADUOSHUWANGLUODOUSHIDUANJULIWANGLUO,DANTAMENJUYOUKUANDAIKUANHEGAOSHUJUSULV(LIRU,Zibgee,LTEDENG),BINGQIETAMENZAILIANLUYUSUANYOUXIANDEQINGKUANGXIACUNZAIYANZHONGWENTI。CIWAI,LoRaHEQITALPWANDEANZHUANGCHENGBENGENGDI,BINGQIEZAILPWANPANGBIANBUXUYAOZHONGJIQI,ANZHUANGCHENGBENGENGDI,BINGQIEBUXUYAOZHONGJIQI。CIWAI,LPWANXUYAOGENGSHAODEGONGHAO。

标签 NB-IoT

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