ããžãã¹ã®æé·ãšå¹çãéèŠããããªãã«ãšã£ãŠãæé©ãªéä¿¡ãœãªã¥ãŒã·ã§ã³ã®éžæã¯å¿ é ã§ããããã§ã¯LoRaã¢ãã«ãåŠäœã«ããŠé·è·é¢ã§ã®äœé»åæ¶è²»éä¿¡ãå¯èœã«ããããžãã¹ã®ååéã«é©æ°ããããããŠããããçŽè§£ããŠããŸãããã®ãã¯ãã«ã«ã¬ã€ãã§ã¯ãåºæ¬ããé«åºŠãªæè¡çåŽé¢ãçµæžçã¡ãªããã«è³ããŸã§ãLoRaWANã®æã€ããã³ã·ã£ã«ãäœããšãããªã解説ããŸããããã«ããªã¢ã«ãªå°å ¥äºäŸã亀ãã€ã€ãå°æ¥æ§ãæ¢ããæ£ããLoRaã¢ãã«ã®å°å ¥æ¹æ³ãã¬ã€ãããŸããããžãã¹ããŒãœã³ã®ã¿ãªããã次äžä»£éä¿¡æè¡ãžã®ç解ãæ·±ãã競äºåªäœã確ä¿ããããã®ç¬¬äžæ©ãèžã¿åºããŸãããã
LoRaã¢ãã«ã®æŠèŠãšãã®é²å
LoRaïŒLong RangeïŒã¢ãã«ã¯ãé»åæ¶è²»ãå°ãªãé·è·é¢éä¿¡ãå¯èœãªç¡ç·éä¿¡æè¡ãæããŸãããã®æè¡ã¯ãç¹ã«ãããã¯ãŒã¯ã¢ã¯ã»ã¹ãå°é£ãªé éå°ããçãšãã«ã®ãŒãèŠæ±ãããç°å¢ã»ã³ãµãŒãªã©ã«é©ããŠããŸãã
LoRaæè¡ã¯ãäœãããŒã¿ã¬ãŒãã§åºç¯å²ãã«ããŒããããšã§ãéœåžéšãéå€ã§ã®å¹ åºãIoTã¢ããªã±ãŒã·ã§ã³ã®å®çŸã«è²¢ç®ããŠããŸãããç¬èªã®å€èª¿æ¹åŒã䜿çšããå¹²æžãä¿¡å·è¡°éã«åŒ·ãããšãç¹çãããŸãã
ãã®ã¢ãã«ãé²åãéããã«åŸããç£æ¥ã»èŸ²æ¥ã»ã¹ããŒãã·ãã£ãŒãªã©ãå€æ§ãªã·ãŒã³ã§ã®æ¡çšäºäŸãå¢å ããŠããŸããå®äŸ¡ãªãããã®éçºããç¶²çŸ çãªãããã¯ãŒã¯ã®æŽåãé²åã®èŠå ã®äžã€ã§ãã
LoRaæè¡ã®åºæ¬
LoRaæè¡ã¯ãChirp Spread SpectrumïŒCSSïŒå€èª¿ãæ¡çšããŠããããããé·è·é¢éä¿¡ãšäœé»åæ¶è²»ãåæã«éæããã«ã®ãšãªã£ãŠããŸããç¬èªã®å€èª¿æ¹åŒã¯ããã€ãºãç©ççé害ç©ãå€ãç°å¢äžã§ãä¿¡å·ãä¿æããŸãã
ãã®æè¡ã®åºæ¬çãªã¡ã«ããºã ã«ãããéåžžã«åºãç¯å²ãã«ããŒããäºãã§ããäžã€ã®ã²ãŒããŠã§ã€ã§æ°åããã¡ãŒãã«ã«åã¶éä¿¡ãå¯èœã«ãªããŸãããã®ãããã€ã³ãã©ã®åæã³ã¹ãåæžã«ãå¯äžããŠããŸãã
LoRaæè¡ã¯ã©ã€ã»ã³ã¹ããªãŒãªåšæ³¢æ°åž¯ã䜿çšãããããå©çšäŒæ¥ã¯ã©ã€ã»ã³ã¹æã®æ¯æãã«ã€ããŠå¿é ããå¿ èŠããªããèšçœ®ãšéçšã容æã«ãªããŸãããã®ã¢ãããŒããå€ãã®äŒæ¥ãèªæ²»äœã«æ¯æãããŠããŸãã
LoRaWANã®ç»å Žãšç¹åŸŽ
LoRaWANã¯LoRaæè¡ãåºã«ããéä¿¡èŠæ Œã§ããããã®èŠæ ŒãéããŠãããã¯ãŒã¯éä¿¡ãããçºå±ãããIoTããã€ã¹éã®ã€ã³ã¿ãŒãããæ¥ç¶ãå®çŸããŸããäœé»åã§åºç¯å²ãªãããã¯ãŒã¯ãæ§ç¯å¯èœãªããšãç¹è²ã§ãã
LoRaWANã¯ãšã³ãããã€ã¹ãã²ãŒããŠã§ã€ããããã¯ãŒã¯ãµãŒããå«ãäžå±€ã¢ãŒããã¯ãã£ãæ¡çšããŠããŸããããã¯ãšã³ãããã€ã¹ãã²ãŒããŠã§ã€çµç±ã§ãããã¯ãŒã¯ãµãŒãã«æ å ±ãéä¿¡ããä»çµã¿ã§ãããåäžã®ã²ãŒããŠã§ã€ãè€æ°ã®ããã€ã¹ãšã®éä¿¡ãåŠçã§ããŸãã
ãã®èŠæ Œã«ã¯ã»ãã¥ãªãã£ãçµã¿èŸŒãŸããŠãããéä¿¡ã®æå·åãšèªèšŒãæšæºã§æäŸãããŸãããŸããå€æ§ãªåž¯åå¹ ãã¬ãŒãã®äžããé©åãªèšå®ãéžæãããããã¯ãŒã¯ã®ç¶æ³ã«å¿ããŠæé©åããããšãå¯èœã§ãã
LoRaã¢ãã«ã®å±éãšå¿çšåé
LoRaã¢ãã«ã¯IoTã®å¿çšåéã«ãããŠå€å²ã«æž¡ãå±éãèŠããŠããŸããã¹ããŒã蟲æ¥ã§ã¯ãåå£ã®æ¹¿åºŠãæ°è±¡æ¡ä»¶ãã¢ãã¿ãªã³ã°ããã»ã³ãµãŒã«äœ¿çšãããããšã§ãæ°Žãè¥æã®æé©åã«è²¢ç®ããŠããŸãã
éœåžéšã§ã¯ãã¹ããŒãããŒãã³ã°ãçœå®³èŠå ±ã·ã¹ãã ãšããŠã®æ¡çšãé²ãã§ãããè³æºã®æå¹å©çšãåžæ°ã®ç掻ã®å©äŸ¿æ§åäžãå®å šã®ç¢ºä¿ã«å¯äžãã圹å²ãæãããŠããŸãããŸããæ¶è²»è åãã®ãã©ããã³ã°ããã€ã¹ãšããŠãå©çšãããŠããŸãã
ããã«ãLoRaã¢ãã«ã¯å·¥å Žãã€ã³ãã©æœèšã§ã®ã¢ã»ãããã©ããã³ã°ããšãã«ã®ãŒç£èŠãé éã¡ãŒã¿ãŒèªåããªã©ãç£æ¥çšã¢ããªã±ãŒã·ã§ã³ã«ãé©çšãããŠããŸããç¶ç¶çãªæ¹è¯ã«ããããããã®å¿çšåéã§ã®ããã©ãŒãã³ã¹ãšä¿¡é Œæ§ãåäžããŠããŸãã
LoRaãšã³ã·ã¹ãã ã®çºå±
LoRaãšã³ã·ã¹ãã ã¯ãã¡ãŒã«ãŒãéçºè ããµãŒãã¹ãããã€ããŒããããŠãšã³ããŠãŒã¶ãŒãçµã¶åºç¯ãªãããã¯ãŒã¯ã§ããããã«ãã£ãŠãçžäºéçšæ§ãæ ä¿ãããå€çš®å€æ§ãªããã€ã¹ããœãªã¥ãŒã·ã§ã³ã®å±éãä¿é²ãããŠããŸãã
ãªãŒãã³ãªã³ãã¥ããã£ãšããŠã®LoRa Allianceãæ蟲å°ãçãã§ãæšæºåãé²ããããšã§ãäžçåå°ã®ã²ãŒããŠã§ã€ãããã€ã¹éã§ã®äºææ§ãé«ããŠããŸããããã«ãããLoRaæè¡ã䜿çšãã補åã®æ®åãå éããŠããŸãã
ãããã¯ãŒã¯ãªãã¬ãŒã¿ãŒãã·ã¹ãã ã€ã³ãã°ã¬ãŒã¿ãŒãã»ã³ãµãŒããã³ããã€ã¹ã¡ãŒã«ãŒãªã©ãå ±åã§ããšã³ã·ã¹ãã ã®ãããªãå å®ãå³ã£ãŠãããããå æ¬çã§çµ±åãããIoTãœãªã¥ãŒã·ã§ã³ãåžå Žã«æäŸãããŠããŸãã
LoRaã¢ãã«ã®ãã¯ãã«ã«ã¬ã€ã
LoRaã¢ãã«ã®ã¢ãŒããã¯ãã£
LoRaïŒLong RangeïŒæè¡ã¯ãäœæ¶è²»é»åã§åºç¯ãªãšãªã¢ã«ãã¬ããžãæããããšãããIoTããã€ã¹éã®éä¿¡ã«åºãæ¡çšãããŠããŸããLoRaã®ã¢ãŒããã¯ãã£ã¯ããšã³ãããã€ã¹ãã²ãŒããŠã§ã€ããããã¯ãŒã¯ãµãŒããŒã®ïŒã€ã®äž»èŠã³ã³ããŒãã³ãã§æ§æãããŠããŸãã
ãšã³ãããã€ã¹ã¯ã»ã³ãµãŒãã¢ã¯ãã¥ãšãŒã¿ãŒãªã©ãæ å ±ãåéãéä¿¡ãã圹å²ãæ ã£ãŠããŸãããããã¯ã¹ãã¯ãã«å¹çãé«ããäœé»åã§é è·é¢éä¿¡ãå¯èœãªLoRaWANãããã³ã«ã䜿çšããŠã²ãŒããŠã§ã€ã«éä¿¡ããŸãã
ã²ãŒããŠã§ã€ã¯ãšã³ãããã€ã¹ããéä¿¡ãããä¿¡å·ãåãåããã€ã³ã¿ãŒãããçµç±ã§äžå€®ã®ãããã¯ãŒã¯ãµãŒããŒã«è»¢éããŸããå€å¯Ÿå€ã®éä¿¡ãå¯èœã§ãããã²ãŒããŠã§ã€ïŒã€ã§è€æ°ã®ãšã³ãããã€ã¹ãæ¥ç¶ã§ããã®ãç¹åŸŽã§ãã
åšæ³¢æ°åž¯ãšãããã¯ãŒã¯ãããã³ã«
LoRaæè¡ã¯ãã©ã€ã»ã³ã¹ãäžèŠãªISMãã³ãã§éçšãããããšãå€ããååœãå°åã«ãã£ãŠæå®ãããåšæ³¢æ°åž¯ã䜿çšããŸããäŸãã°ããšãŒãããã§ã¯868 MHzãåç±³ã§ã¯915 MHzã®åšæ³¢æ°åž¯ã䜿çšããŸãã
ãããã®åšæ³¢æ°åž¯ã¯ãç¹ã«å±å€ã§ã®é·è·é¢éä¿¡ã«åªããŠããããã«ã®äžãªã©é害ç©ãããç°å¢ã§ãä¿¡å·ãéåä¿¡ã§ããèœåããããŸããããã«ãããLoRaã¯éœåžéšããã³èŸ²æéšåããå¹ åºãå°åã§å©çšãããŸãã
LoRaWANãããã³ã«ã¯ãããã€ã¹ã®é»åæ¶è²»ãæå°éã«æãã€ã€ãå®å šãã€ä¿¡é Œæ§ã®é«ããã€ãã£ã¬ã¯ã·ã§ãã«éä¿¡ãæäŸããŸããã¹ã¿ãŒãããã¯ãŒã¯ã®ããããžãŒã䜿çšããããŸããŸãªã¢ããªã±ãŒã·ã§ã³ã§ã®ããŒã¿è»¢éã®æé©åãå³ã£ãŠããŸãã
ããŒã¿ã¬ãŒããšéä¿¡ç¯å²ã®é¢ä¿
LoRaã¢ãã«ã«ãããŠãããŒã¿ã¬ãŒããšéä¿¡ç¯å²ã¯çžäºã«åœ±é¿ãåãŒãèŠçŽ ã§ããããŒã¿ã¬ãŒããé«ãã»ã©ãéä¿¡ã§ããããŒã¿éã¯å¢ããŸãããããã«ã¯éä¿¡ç¯å²ãç ç²ã«ãªãå¯èœæ§ããããŸãã
éä¿¡ç¯å²ã¯ã䜿çšããåšæ³¢æ°åž¯ãåšå²ã®ç°å¢ã«ãã£ãŠã倧ããå€ãããŸãããäžè¬çã«ã¯LoRaã«ããéä¿¡è·é¢ã¯åžè¡å°ã§æ°ããã¡ãŒãã«ãéæŸç©ºéã§ã¯æ°åããã¡ãŒãã«ã«åã¶ããšã蚌æãããŠããŸãã
ãªããããŒã¿ã¬ãŒããäžããããšã§ããšã³ãããã€ã¹ã®é»åæ¶è²»ãæãã€ã€ãããé ãé¢ããã²ãŒããŠã§ã€ãšã®éä¿¡ãå®çŸãããããšãå¯èœã§ãããã®ãã¬ãŒããªããç解ããã¢ããªã±ãŒã·ã§ã³ã«æé©ãªèšå®ãéžæããããšãéèŠã§ãã
æå·åãšã»ãã¥ãªãã£ã¡ã«ããºã
IoTç°å¢ã«ãããã»ãã¥ãªãã£ã¯éåžžã«éèŠã§ãããLoRaWANã¯ããŒã¿ã®æå·åãšã»ãã¥ãªãã£ã¡ã«ããºã ã«é«ãåªå 床ã眮ããŠããŸãããšã³ãããã€ã¹ããã²ãŒããŠã§ã€ãããã«ãããã¯ãŒã¯ãµãŒããŒãžã®éä¿¡ã¯å šãŠã匷åºãªæå·åã«ãã£ãŠä¿è·ãããŠããŸãã
LoRaWANã¯ããããã¯ãŒã¯ã»ãã·ã§ã³ããŒãšã¢ããªã±ãŒã·ã§ã³ã»ãã·ã§ã³ããŒã®ïŒã€ã®ããŒã䜿çšããŠéä¿¡ãæå·åããŸããããã«ããããšã³ãããã€ã¹ãšã¢ããªã±ãŒã·ã§ã³ãµãŒããŒéã®ããŒã¿ãä¿è·ãããŸãã
ããã«ãå®æçãªããŒæŽæ°ãããã€ã¹èªèšŒãªã©ã®ã»ãã¥ãªãã£å¯ŸçãæœãããŠãããäžæ£ã¢ã¯ã»ã¹ãããŒã¿æŒããã®ãªã¹ã¯ãæå°éã«æããŠããŸããããã«ããããŠãŒã¶ãŒã¯å®å¿ããŠLoRaæè¡ãå©çšããããšãã§ããŸãã
LoRaã¢ãã«ã掻çšããããžãã¹ã®ã¡ãªãã
LoRaïŒLong RangeïŒã¢ãã«ã¯ãIoTåéã«é©åœããããããç¡ç·éä¿¡æè¡ã§ããããžãã¹ã«ãããLoRaã®æŽ»çšã¯ããã®é·è·é¢éä¿¡èœåãšäœé»åæ¶è²»ã®ç¹åŸŽã«ãã£ãŠãå€ãã®çµç¹ãéçšã³ã¹ããåæžãã€ã€ãããå¹ççãªãªãã¬ãŒã·ã§ã³ãç®æãããã®æ段ãšãªã£ãŠããŸãã
ãã®èšäºã§ã¯ãLoRaã¢ãã«ãããžãã¹ã«ããããå ·äœçãªã¡ãªããã«çŠç¹ãåœãŠãéçšã³ã¹ãã®åæž¡ãšæè³åççïŒROIïŒåäžãã¹ã±ãŒã©ããªãã£ãšå€æ§ãªãããã€ã¡ã³ããã»ãã¥ãªãã£ã®åŒ·åããªã¢ã«ã¿ã€ã ããŒã¿åæã«åºã¥ãææ決å®ã®æ¹åãšãã£ãç¹ãæ¢ç©¶ããŸãã
éçšã³ã¹ãã®åæžãšROI
LoRaã¢ãã«ãå°å ¥ããæ倧ã®ã¡ãªããã¯ãéçšã³ã¹ãã®åçãªåæžã§ããå€ãã®ã»ã³ãµãŒãããã€ã¹ãäœã³ã¹ãã§æ¥ç¶ã§ãããããæ¢åã®ç¡ç·éä¿¡æè¡ãšæ¯èŒããŠçµæžçãªã¡ãªããããããŸãã
ããã«ãLoRaæ©åšã®äœé»åèšèšã¯ãã¡ã³ããã³ã¹ã³ã¹ãã®åæžã«ãå¯äžããŸããé»æ± ã®æã¡ãããã亀æã®é »åºŠãå°ãªããããé·æã«ãããéçšã§èŠç©ãããšROIã¯å€§å¹ ã«æ¹åãããããšãå®èšŒãããŠããŸãã
æè³ã®åæã³ã¹ãã«ãããŠããLoRaã®ã€ã³ãã©ã¯æ¯èŒçå®äŸ¡ã§æ§ç¯ãå¯èœãªãããäžå°èŠæš¡ã®ããžãã¹ã§ãè² æ ãªãå°å ¥ãé²ããããç¹ãé åã§ãã
ã¹ã±ãŒã©ããªãã£ãšå€æ§ãªãããã€ã¡ã³ã
LoRaãããã¯ãŒã¯ã¯ãã®æè»æ§ã«ãããŠé«ãè©äŸ¡ãåããŠãããå¿ èŠã«å¿ããŠå®¹æã«ã¹ã±ãŒã«ã¢ãããã§ãããšããå©ç¹ããããŸããããžãã¹ã®æé·ãæ¡å€§ã«äŒŽããLoRaããŒã¹ã®ã·ã¹ãã ããŸããè¿œå æè³ãæå°åãã€ã€ãæ¡åŒµã容æã§ãã
éœåžéšãã蟲æéšãŸã§å¹ åºãç°å¢ã§ã®ãããã€ã¡ã³ããè¡ããã®ããLoRaæè¡ã®å€§ããªç¹åŸŽã®äžã€ã§ããç°ãªãããžãã¹ã·ããªãªã«å¿ããå¹ åºãã¢ããªã±ãŒã·ã§ã³ãšã®äºææ§ããããå€æ§ãªããžãã¹ããŒãºã«å¯Ÿå¿å¯èœã§ãã
ã€ã³ãã©ãæ¢ã«æŽã£ãŠããå Žæã ãã§ãªããã€ã³ãã©ã¹ãã©ã¯ãã£ãæªçºéãªå°åã§ããäœã³ã¹ãã§LoRaãããã¯ãŒã¯ãæ§ç¯ã§ãããããæ°èŠåžå Žãžã®é²åºã®è¶³ããããšããªãããã§ãããã
ãšã³ãããŒãšã³ãã®ã»ãã¥ãªãã£ã®åäž
ã»ãã¥ãªãã£ã¯ã©ã®ããžãã¹ã«ãããŠãäžå¿çãªæžå¿µäºé ã§ãããLoRaã¢ãã«ã¯ãšã³ãããŒãšã³ãã§ã®ã»ãã¥ãªãã£å¯ŸçãæœãããŠããŸããããŒã¿è»¢éã®éã«è¡ãããæå·åã«ãããæªæã®ããã¢ã¯ã»ã¹ããããŒã¿ãå®ãããšãã§ããŸãã
ãŸããLoRaWANã¯ãããã¯ãŒã¯ãµãŒããšããã€ã¹éã§ã®éä¿¡ã«ãããŠããŠããŒã¯ãªã»ãã¥ãªãã£ããŒã䜿çšãããã«ãããããŒã¿ã®æ¹ç«ãäžæ£ã¢ã¯ã»ã¹ã®ãªã¹ã¯ã軜æžããä¿¡é Œæ§ã®é«ãéä¿¡ãä¿èšŒããŸãã
ããã€ã¹ã¬ãã«ã§ã®ã»ãã¥ãªãã£ãå³æ Œã§ãããããIoTããã€ã¹ãçŽé¢ããå€ãã®ã»ãã¥ãªãã£åé¡ã«å¯ŸããŠãLoRaãå®å¹æ§ã®ãããœãªã¥ãŒã·ã§ã³ãæäŸããŠããŸãã
ãªã¢ã«ã¿ã€ã ããŒã¿åæãšææ決å®
ãªã¢ã«ã¿ã€ã ããŒã¿ã掻çšããããšã¯ãè¿ éãã€å¹æçãªææ決å®ã«äžå¯æ¬ ã§ããLoRaæè¡ãçšããããšã§ãé éå°ããã®ããŒã¿åéãå¯èœãšãªããçŽã¡ã«åæããŠè¡åãèµ·ããããšãã§ããŸãã
ãã®å³ææ§ã¯ãç¹ã«ãµãã©ã€ãã§ãŒã³ç®¡çãè³ç£ãã©ããã³ã°ãç°å¢ç£èŠãªã©ã®åéã§éå®ãããŸããããŒã¿ã«åºã¥ãèŠèãæ¥ãã§è¡ãå¿ èŠãããããžãã¹ã·ããªãªã«ãããŠãLoRaã¢ãã«ã¯å€§ããªåŒ·ã¿ãæäŸããŸãã
ç·ããŠãLoRaã¢ãã«ã¯äœé 延ã®ãããã¯ãŒã¯ãæ§ç¯ããããšã§ãããè¿ éãªããŒã¿åŠçãšååŸãå¯èœã«ããäŒæ¥ãåžå Žã§ã®ç«¶äºåªäœã確ä¿ããããã®éèŠãªèŠçŽ ãšãªãåŸãŸãã
LoRaã¢ãã«ã®å°å ¥äºäŸ
éœåžã€ã³ãã©ã®ã¹ããŒãå
LoRaã¢ãã«ã¯ãéœåžã€ã³ãã©ã®ã¹ããŒãåãæšé²ããéèŠãªæè¡ã®äžã€ãšããŠç»å ŽããŸãããè¡ç¯ã亀é管çã·ã¹ãã ãªã©ã®éœåžã®åºç€ãå¹çããããã€çµæžçã«ç®¡çããããã®ã€ãããŒã·ã§ã³ã§ãã
äŸãã°ãé»åæ¶è²»ãã»ã³ãµãŒã§åžžæç£èŠããå¿ èŠã«å¿ããŠè¡ç¯ã®æãããèªå調ç¯ããã·ã¹ãã ãå°å ¥ãããŠããŸããããã«ãããé»åã®ç¡é§é£ããæããéçšã³ã¹ãã®åæžã«ãå¯äžããŠããŸãã
ãŸãã亀éã®æµãããªã¢ã«ã¿ã€ã ã§ææ¡ããä¿¡å·ã·ã¹ãã ãæé©åããããšã§ã亀éæžæ»ãç·©åããäžå±€ã¹ã ãŒãºãªäº€éæµããå®çŸããŠããŸããLoRaãã¯ãããžãŒã®äœã³ã¹ããã€é·è·é¢éä¿¡èœåã¯ãããããéœåžã€ã³ãã©ã®ã¹ããŒãåã匷åã«æ¯ããŠããŸãã
蟲æ¥åéã«ããã粟å¯èŸ²æ¥
蟲æ¥åéã§ã¯ãLoRaã¢ãã«ã®å°å ¥ã«ãã粟å¯èŸ²æ¥ãå¯èœãšãªããåç©«éã®å¢å ãšè³æºã®ç¯çŽãæåŸ ãããŠããŸããã»ã³ãµãŒãçšããŠåå£ã®æ°Žåãè¥æã®ç¶æ³ã管çããããšãããã®æè¡ã®å€§ããªå©ç¹ã§ãã
ãŸãã蟲è¬ã®äœ¿çšéãæé©åããããšã«ãè²¢ç®ããŠãããç°å¢ãžã®åœ±é¿ãäœæžããªããäœç©ã®çç£æ§ãé«ããããšãã§ããŸããåœã«ãã£ãŠã¯ããã®æè¡ãçšããŠåœå®¶ã¬ãã«ã§ã®é£æèªçµŠçã®åäžã«åªããŠããäºäŸãèŠãããŸãã
蟲çç£ç©ã®çç£ã©ã€ã³ã§ã®å質管çã«ãLoRaã¢ãã«ã掻çšãããŠããã枩床ã湿床ãªã©ã®ããŒã¿ãéããå質ã®äžè²«æ§ãä¿ã€ããšã«ãå¯äžããŠããŸãã
å·¥æ¥åéã§ã®è³ç£è¿œè·¡ãšç£èŠ
補é æ¥ã«ãããè³ç£ã®è¿œè·¡ãšç£èŠã¯ãLoRaã¢ãã«ã«ãã£ãŠäžæ®µãšå¹çåãããŸãããå·¥å Žå ã®æ©åšãåšåº«ç®¡çã«äœ¿ãã¿ã°ãLoRaãããã¯ãŒã¯ã«ç¹ããããšã§ããªã¢ã«ã¿ã€ã ãã€æ£ç¢ºãªè¿œè·¡ãå®çŸããŠããŸãã
ãã®ã·ã¹ãã ã®å°å ¥ã«ãããçŽå€±ãçé£ã®ãªã¹ã¯ã®äœæžãããã«ã¯çç£å¹çã®åäžãæåŸ ãããŠããŸãããŸããæ©åšã®å®æçãªã¡ã³ããã³ã¹ãæ éã®äºé²ã«ã圹ç«ãŠãããŠããŸãã
å·¥æ¥åéã«ãããé«äŸ¡ãªæ©æ¢°ãè£ çœ®ã®ç¶æ ãåžžã«ææ¡ããå¿ èŠãªæã«é©åãªã¡ã³ããã³ã¹ãè¡ãããšã§ãããŠã³ã¿ã€ã ãæå°éã«æããããšã«ãè²¢ç®ããŠããŸãã
ãšãã«ã®ãŒç®¡çãšã¹ããŒãã°ãªãã
ãšãã«ã®ãŒç®¡çã®åéã§ãLoRaã¢ãã«ã泚ç®ãããŠããŸãããšããããé»åã®äŸçµŠãšæ¶è²»ã®ãã©ã³ã¹ãåãã¹ããŒãã°ãªããæè¡ã«ãããŠãLoRaã®æã€é·è·é¢éä¿¡èœåã掻çšãããŠããŸãã
ãšãã«ã®ãŒæ¶è²»ãå¹ççã«ç®¡çããããšã¯ãäŸçµŠéå€ãäžè¶³ã«ããåé¡ãé¿ããããã«äžå¯æ¬ ã§ããLoRaãã¯ãããžãŒã¯ã家åºãäŒæ¥ããåŸããããšãã«ã®ãŒããŒã¿ã®åéã«åœ¹ç«ã¡ãããè³¢ããšãã«ã®ãŒäœ¿çšãå¯èœã«ãªããŸãã
ããã«ãåçå¯èœãšãã«ã®ãŒæºããã®é»åãã¹ããŒãã°ãªããã«çµ±åããæç¶å¯èœãªç€ŸäŒã®å®çŸã«åããŠããã®æè¡ã¯å€§ããªåœ¹å²ãæ ã£ãŠããŸããæäœæ§ãã³ã¹ãããã©ãŒãã³ã¹ã«åªããLoRaã¢ãã«ã¯ãå¿«é©ã§ãšã³ããžã«ã«ãªã©ã€ãã¹ã¿ã€ã«ã®å®çŸãèŠæ®ããæªæ¥ã®ãšãã«ã®ãŒã·ã¹ãã ã«ã¯æ¬ ãããªãæè¡ã§ãã
LoRaã¢ãã«ã®å°æ¥æ§ãšå±æ
æè¡é©æ°ãšLoRaWANããŒãžã§ã³ã®æŽæ°
LoRaWANãã¯ãããžãŒã¯ããšãã«ã®ãŒå¹çãšé·è·é¢éä¿¡ã®ããŒãºã«å¿ããããã«é²åãç¶ããŠããŸããæè¡é©æ°ã«ãã£ãŠããã®ããŒãžã§ã³ã¯æŽæ°ãããããŒã¿äŒéé床ã®åäžãã»ãã¥ãªãã£åŒ·åãã€ã³ã¿ãŒãã§ãŒã¹ã®æ¹åãèŠãããŸããããããæ¹è¯ã«ãããæ§ã ãªç£æ¥ãLoRaWANã掻çšããæ©äŒãæ¡å€§ããŠããŸãã
ããŒãžã§ã³ã®æŽæ°ã¯ããšã³ããŠãŒã¶ãŒã«ãšã£ãŠããããã€ã¹ã¡ãŒã«ãŒã«ãšã£ãŠãéèŠã§ããæ°ãããããã³ã«ã®å°å ¥ã«ãããããä¿¡é Œæ§ãé«ããå€æ©èœãªããã€ã¹ãæäŸãããããã«ãªããŸãããããã«ãããåžå Žã®æ¡å€§ãäºæž¬ãããã ãã§ãªããæ¢åã®ãããã¯ãŒã¯ã®ã¢ããã°ã¬ãŒãã«ã圹ç«ã£ãŠããŸãã
äžæ¹ã§ãããããé²åã«ã¯ãæ¢åãŠãŒã¶ãŒã®é©å¿ã«é¢ãã課é¡ã䌎ããŸãããããããšã³ããŠãŒã¶ãŒãææ°ã®ããŒãžã§ã³ã«è¿ éã«ç§»è¡ããããšã§ãããè¯ãéä¿¡äœéšãåŸããããšèããããŸããæè¡é©æ°ã¯ãLoRaWANã®å¯èœæ§ãæŽã«åºããåååã§ãã
ã¹ããŒãã·ãã£ãžã®ã€ã³ãã°ã¬ãŒã·ã§ã³
ã¹ããŒãã·ãã£ã®æ§æ³ã§ã¯ãLoRaã¢ãã«ã¯äžå¿çãªåœ¹å²ãæ ããŸãããã®æè¡ãå©çšããããšã§ãéœåžã€ã³ãã©ã®ç£èŠãšç®¡çã匷åããããšãã«ã®ãŒæ¶è²»ãæé©åããå ¬å ±ãµãŒãã¹ã®è³ªãåäžãããããšãå¯èœã§ããLoRaã®äœãé»åæ¶è²»ãšåºç¯å²ã«ãã¬ããžã¯ãã¹ããŒãã·ãã£æè¡ã®çæ³çãªåè£ãšããŠæ³šç®ãéããŠããŸãã
ç §æ管çã亀éæµã®æé©åãå»æ£ç©ç®¡çã·ã¹ãã ãªã©ãæ§ã ãªã¢ããªã±ãŒã·ã§ã³ãã¹ããŒãã·ãã£ã®çºå±ã«è²¢ç®ããŠããŸããLoRaã»ã³ãµãŒã®æäŸããããŒã¿ã¯ãéœåžèšç»ã®å¹çåã«åœ¹ç«ãŠãããããå¿«é©ã§æç¶å¯èœãªéœåžç°å¢ã®åµé ãç®æããŠããŸãã
LoRaWANã®å°å ¥ã¯ãã¹ããŒãã·ãã£èšç»ã®åæè²»çšãåæžããé·æçã«ã¯çµæžçãªã¡ãªããããããããŸããã€ã³ãã©ã®ã¹ã±ãŒã©ããªãã£ãšæè»æ§ãå€§å¹ ã«åäžããå°æ¥ã®æè¡é©æ°ãåžæ°ã®ããŒãºã®å€åã«å¯Ÿå¿ããããã®åå°ãäœã£ãŠããŸãã
5Gãšã®é£æºå¯èœæ§
5Gã®å°é ã«ãã£ãŠãéä¿¡æè¡ã®æ°æ代ãå°æ¥ããŠããŸããLoRaWANã¯ã5Gãšé£æºããããšã§ããã®ã³ãã¯ãã£ããã£ãããã«æ¡åŒµã§ããããã³ã·ã£ã«ãç§ããŠããŸããç¹ã«ããã·ã³ã¿ã€ãéä¿¡(MTC)ã®åéã§ã5GãšLoRaWANã®çµã¿åããã¯å¹æçã§ãã
5Gãé«éã§å€§éã®ããŒã¿åŠçèœåãæäŸããã®ã«å¯ŸããLoRaWANã¯é·è·é¢ãšçé»åã®äŒéã«ç¹åããŠããŸãããããã®ç¹åŸŽãããŸãçµã¿åãããããšã§ãå¹ççãªãããã¯ãŒã¯ç°å¢ãåµåºããããšãæåŸ ãããŠããŸããäŸãã°ãéœåžéšã§ã®5Gã®é«å¯åºŠãããã¯ãŒã¯ãšãããåºãå°åãã«ããŒããLoRaWANã®é£æºã§ãã
ãŸãã5GãšLoRaWANã¯ããããããç°ãªãéä¿¡ããŒãºã«å¯Ÿå¿ãããããçžäºè£å®çãªåœ¹å²ãæããããšãã§ããŸãããã®ç¹ããæªæ¥ã®éä¿¡ã€ã³ãã©ã«ãããå€æ§ãªãŠãŒã¹ã±ãŒã¹ããµããŒãããäžã§éèŠã§ããäž¡ãã¯ãããžãŒã®ååã«ãããæ°ããªãµãŒãã¹ãã¢ããªã±ãŒã·ã§ã³ã®å±éãæåŸ ãããŸãã
æç¶å¯èœãªãœãªã¥ãŒã·ã§ã³ãšããŠã®LoRa
ãšã³ã·ã¹ãã ã«å¯Ÿããæžå¿µãé«ãŸãäžãLoRaãã¯ãããžãŒã¯ãã®æç¶å¯èœæ§ã«ãã£ãŠç¹ã«æ³šç®ãéããŠããŸããäœããšãã«ã®ãŒæ¶è²»ã¯ãç°å¢ãžã®è² è·ãæžãããé·æçãªãµã¹ããããªãã£ãžã®å¯Ÿå¿ãå¯èœã§ãã
蟲æ¥ã»ã¯ã¿ãŒã§ã¯ãæ°Žè³æºã®ç®¡çã蟲è¬ã®äœ¿çšéåæžã«LoRaã»ã³ãµãŒã掻çšããŠããŸããããã«ãããæç¶å¯èœãªèŸ²æ¥å®è·µãæšé²ãããè³æºå¹çã®æ¹åã«è²¢ç®ããŠãããç°å¢ä¿å šã«ãã€ãªãããŸããããã«ãäŒæ¥ã¯LoRaãå©çšããŠãæœèšå ã®ãšãã«ã®ãŒç®¡çãæé©åããã³ã¹ãåæžãšCO2æåºéã®äœæžãå®çŸããŠããŸãã
ãªãã°ãªããå°åããªã¢ãŒããšãªã¢ã«ãããŠããLoRaã®äœæ¶è²»é»åãšé·è·é¢éä¿¡èœåã¯ãã€ã³ã¿ãŒãããã¢ã¯ã»ã¹ã®æäŸãåºèæ å ±éä¿¡ãžã®å¿çšãå¯èœã«ããŠããŸããããããç¹æ§ããå°çèŠæš¡ã§ã®ç°å¢è² è·è»œæžã«è²¢ç®ãããšåæã«ã瀟äŒçµæžçã«ã䟡å€ãããããéèŠãªåœ¹å²ãæãããŠããã®ã§ãã
LoRaã¢ãã«ã®å°å ¥ã¬ã€ãã©ã€ã³
é©åãªLoRaWANã²ãŒããŠã§ã€ã®éžå®
LoRaWANã²ãŒããŠã§ã€ã®éžå®ã¯ãLoRaã¢ãã«å±éã®æåã«äžå¯æ¬ ã§ããéä¿¡ç¯å²ã容éãããã³èä¹ æ§ãèæ ®ãããããžã§ã¯ãã®ããŒãºã«ããããã補åãéžã³ãŸããä¿¡é Œæ§ã®é«ãã²ãŒããŠã§ã€ãéžæããããšã§ãé·æã«ãããå®å®ããéä¿¡ãæ ä¿ãããŸãã
ãŸããã²ãŒããŠã§ã€ã®èšçœ®å Žæã決å®ããéã«ã¯ãé»æ³¢ã®å°éç¯å²ãæé©åããããã«å°åœ¢ã建ç©ã®é害ç©ãèæ ®ããããšãå¿ èŠã§ããããã«ãããããŒã¿è»¢éã®å¹çãåäžããäœé 延ãå®çŸããããšãã§ããŸãã
ããã«ãå°æ¥ã®ã¹ã±ãŒã©ããªãã£ãä¿å®ç®¡çã®ãããããèŠéã«å ¥ããçŸå®çãªã³ã¹ãã§éçšãå¯èœãªã¢ãã«ãéžå®ããããšãéèŠã§ããåžå Žã«ã¯å€æ§ãªã²ãŒããŠã§ã€ããããŸãã®ã§ãæ éã«éžæãè¡ããŸãããã
ã»ã³ãµãŒãšããã€ã¹ã®çµ±å
LoRaã¢ãã«ãå°å ¥ããéã«ã¯ãã»ã³ãµãŒãããã€ã¹ã®çš®é¡ãšæ°ãé©åã«éžå®ããããããLoRaWANãããã¯ãŒã¯ãšã·ãŒã ã¬ã¹ã«çµ±åãããŠããããšã確èªããå¿ èŠããããŸããçµ±åãããããã€ã¹ã¯å¹æçã«éä¿¡ãè¡ããã·ã¹ãã å šäœã®ããã©ãŒãã³ã¹ãé«ããããšãã§ããã®ã§ãã
ããã€ã¹éã®äºææ§ã«æ³šæãæããç°ãªãã¡ãŒã«ãŒãã¢ãã«ã®ããã€ã¹ã䜿çšããå Žåã§ããåé¡ãªãéä¿¡ãè¡ããããã«æ€èšŒãå¿ èŠã§ãããŸããããã€ã¹ã®ãã¡ãŒã ãŠã§ã¢æŽæ°ãå®æçã«è¡ãããšã§ãã»ãã¥ãªãã£å¯Ÿçãšãšãã«æ©èœçãªæ¹åãå³ããŸãã
éçšç°å¢ã«é©ããã»ã³ãµãŒãéžã¶ããšã§ãããæ£ç¢ºãªããŒã¿åéãå¯èœãšãªããã·ã¹ãã ã®ä¿¡é Œæ§ãåäžããŸããå®éã®äœ¿çšç°å¢ã«å³ãããã¹ããè¡ããå®çšæ§ã確ãããªããæé©ãªããã€ã¹çµ±åãç®æããŸãããã
ãããã¯ãŒã¯ã®æé©åãšãã©ãã«ã·ã¥ãŒãã£ã³ã°
LoRaã¢ãã«ã®å°å ¥åŸã¯ãå®æçãªãããã¯ãŒã¯æé©åãå¿ èŠã§ããç¡é§ãªããŒã¿è»¢éãæžããããšã§ããã³ãå¹ ãç¯çŽãããšãã«ã®ãŒå¹çã®è¯ãéçšãå®çŸããŸãããããã¯ãŒã¯ã®ç£èŠããŒã«ã䜿çšããŠãéä¿¡ç¶æ³ããªã¢ã«ã¿ã€ã ã«èŠ³å¯ããå¿ èŠã«å¿ããŠèª¿æŽãè¡ããŸãããã
ãã©ãã«ã·ã¥ãŒãã£ã³ã°ããã»ã¹ãæŽããŠããããšã§ãäºæãã¬åé¡ãçããéã«è¿ éã«å¯ŸåŠããããšãå¯èœãšãªããŸããä¿¡å·ã®å質ãé»æ³¢ã®å¹²æžãããã€ã¹ã®ããããªãŒå¯¿åœãªã©ãå¹ åºãèŠå ãéä¿¡é害ã®åå ãšãªãããšããããããäžå šã®æ å¢ãæŽããŠããããšãèèŠã§ãã
ããã«ãããŒã¿ã®ãã¹ãé 延ãæªç¶ã«é²ãããããã±ããã®åéããšã©ãŒèšæ£ã®ä»çµã¿ãåãããããã³ã«ã®æŽ»çšãèæ ®ã«å ¥ããŸããããããã¹ããªãããã¯ãŒã¯æ§ç¯ã«ã¯ããããã®ã¢ãããŒããäžå¯æ¬ ã§ãã
ç¶ç¶çãªãµããŒããšã¡ã³ããã³ã¹
LoRaã¢ãã«ã®éçšã«ãããŠã¯ãå°å ¥åŸã®ç¶ç¶çãªãµããŒããšã¡ã³ããã³ã¹ãå¿ èŠäžå¯æ¬ ã§ãããµããŒãäœå¶ãæŽããããšã§ããŠãŒã¶ãŒã¯ä»»æã®ã¿ã€ãã³ã°ã§å°é家ã®å©ããåããããšãã§ããŸãããå®æã¡ã³ããã³ã¹ã«ããã·ã¹ãã ã®çšŒåçãä¿ãããŸãã
ç¹ã«ããœãããŠã§ã¢ã®æŽæ°ãã»ãã¥ãªãã£ãããã®é©çšã¯å®æçã«è¡ãã¹ãäœæ¥ã§ãããã·ã¹ãã ãææ°ã®ç¶æ ã«ä¿ã€äžã§éèŠã§ããããã«ããããµã€ããŒæ»æãªã©ã®å€éšããã®è åšã«ãå¹æçã«å¯ŸåŠã§ããŸãã
ãŸããæè¡çãªãµããŒãã ãã§ãªãããŠãŒã¶ãŒãã¬ãŒãã³ã°ãããã¥ã¡ã³ãã®æäŸãç¶ç¶ãµããŒãã®äžç°ãšããŠéèŠã§ããããã«ãããã·ã¹ãã ã®å¹æçãªäœ¿çšãšåé¡çºçæã®èªå·±è§£æ±ºèœåãé«ãŸããéçšå¹çã®åäžã«ã€ãªãããŸãã