Dab tsi yog LoraWan?

Lorawan yog lub zog qis dua thaj chaw network (Lpwan) specification tsim rau wireless tsim tawm rau wireless, roj teeb cov khoom siv roj teeb. Lora twb tau siv ntau lab tus ntawm sensors, raws li Lora-Alliance. Qee qhov ntawm cov khoom siv tseem ceeb uas ua rau lub hauv paus rau qhov kev sib txuas lus bI-taw kev sib txuas lus, kev mus ncig ua si thiab cov kev pab hauv zos.

Ib thaj chaw nyob qhov twg Lorawan sib txawv ntawm lwm cov xwm txheej network yog tias nws siv lub hnub qub archaying lus ntawm cov khoom siv kawg thiab cov neeg rau zaub mov hauv nruab nrab hauv cov backend. Gateways txuas nrog lub network server ntawm cov qauv IP kev sib txuas thaum cov khoom sib txuas lus kawg siv ib qho lossis ntau lub rooj vag. Txhua qhov kev sib txuas lus kawg yog bi-directional, thiab txhawb multicast, enabling software hloov dua tshiab dua huab cua. Raws li Lora-Alliance, lub koom haum uas tsis yog-cov txiaj ntsig uas tsim muaj roj teeb cov lus qhia, qhov no pab khaws cov roj teeb lub neej thiab ua tiav cov kev sib txuas roj teeb ntev.

Ib lub rooj vag ib Lora-enabled tuaj yeem npog tag nrho cov nroog lossis ntau pua ntawm square kilometers. Yog lawm, ntau yam yog nyob ntawm ib puag ncig ntawm qhov chaw muab, tab sis Lora thiab Lorawan thov kom txiav txim siab ntau yam, ntau dua lwm qhov kev sib txuas lus thev naus laus zis.

Xaus cov chav kawm

Lorawan muaj ntau chav kawm sib txawv ntawm cov khoom siv thaum kawg los daws cov kev xav txawv ntawm cov kev siv. Raws li nws lub vev xaib, cov no suav nrog:

• Bi-Directional Xaus-Devices (Chav Kawm A): End-li ntawm chav kawm kev tso cai rau kev sib txuas lus BI-Directional uas txhua qhov kawg ntawm Uplink kis tau ua raws li ob qho luv luv downlink tau txais lub qhov rais. Cov kis tau lub sij hawm tau teem tseg los ntawm nws tus kheej kev sib txuas lus xav tau nrog qhov sib txawv me me raws li lub sijhawm random (aloha-hom raws tu qauv). Chav kawm no ib qho kev ua haujlwm yog qhov system qis tshaj plaws-ntaus ntawv rau cov ntawv thov uas tsuas yog yuav tsum tau downlink kev sib txuas lus tom qab lub sijhawm kawg tau xa ib qho kev sib kis tau ntev. Downlink kev sib txuas lus los ntawm tus neeg rau zaub mov lwm lub sijhawm yuav tau tos kom txog thaum lub sijhawm teem sijhawm tom ntej.
• Bi-directional kawg-pab kiag li lawm nrog teem sijhawm tau txais slots (chav kawm b): Ntxiv rau chav kawm ib qho Random tau txais Windows, chav kawm B pab pawg tau qhib dua qhov rai thaum lub sijhawm teem sijhawm. Txhawm rau kom qhov kawg-ntaus ntawv kom qhib nws txais lub qhov rais ntawm lub sijhawm teem nws tau txais ib lub sij hawm synchronized beaconized beaconized beaconized beacon los ntawm lub rooj vag. Qhov no tso cai rau tus neeg rau zaub mov kom paub thaum kawg-ntaus ntawv yog mloog.
• Bi-directal kawg-pab kiag li lawm nrog maximal tau txais slots (chav kawm c): Cov khoom siv kawg ntawm chav kawm C muaj ze li txuas ntxiv qhib tau txais Windows, tsuas yog kaw thaum xa tuaj.