Nangona iinethiwekhi ze-LTE 450 zisetyenziswe kumazwe amaninzi iminyaka emininzi, kukho umdla ovuselelweyo kubo njengoko ishishini lihamba kwixesha le-LTE kunye ne-5G. Ukukhutshwa kwe-2G kunye nokufika kwe-Narrowband Internet of Things (NB-IoT) nazo ziphakathi kweemarike eziqhuba ukwamkelwa kwe-LTE 450.
Isizathu sesokuba i-bandwidth ejikeleze i-450 MHz ifaneleke ngokufanelekileyo kwiimfuno zezixhobo ze-IoT kunye nezicelo ezibalulekileyo zemishini ukusuka kwiigridi ezihlakaniphile kunye neenkonzo zemitha ezihlakaniphile ukuya kwizicelo zokhuseleko loluntu. Ibhendi ye-450 MHz ixhasa i-CAT-M kunye ne-Narrowband Internet yezinto (NB-IoT) iteknoloji, kunye neempawu ezibonakalayo zeli bhanti zilungele ukugubungela iindawo ezinkulu, ezivumela abaqhubi beeselula ukuba babonelele ngeendleko ezipheleleyo. Makhe sijonge ngakumbi kwiinzuzo ezinxulumene ne-LTE 450 kunye ne-IoT.
Ukugubungela ngokupheleleyo kufuna izixhobo ze-IoT ukunciphisa ukusetyenziswa kwamandla ukuze uhlale uxhumekile. Ukungena nzulu okunikwa yi-450MHz LTE kuthetha ukuba izixhobo zinokuqhagamshelwa ngokulula kwinethiwekhi ngaphandle kokuzama rhoqo ukusebenzisa amandla.
Umahluli ophambili webhendi ye-450 MHz luluhlu lwayo olude, olunyusa kakhulu ukugubungela. Uninzi lweebhendi zeLTE zorhwebo zingaphezulu kwe-1 GHz, kunye neenethiwekhi ze-5G zifikelela kuma-39 GHz. Iifrikhwensi eziphezulu zibonelela ngeereyithi eziphezulu zedatha, ngoko ke i-spectrum eninzi yabelwe la mabhanti, kodwa oku kuza kwiindleko zokunciphisa umqondiso okhawulezayo, odinga uthungelwano oluxineneyo lwezikhululo zesiseko.
Ibhendi ye-450 MHz ikwelinye icala lembonakalo. Umzekelo, ilizwe elinobungakanani be-Netherlands linokufuna amawaka ezikhululo ezisisiseko ukuphumeza ukhuselo olupheleleyo lwejografi kurhwebo lwe-LTE. Kodwa ulwandiso olwandisiweyo lwe-450 MHz lufuna kuphela amakhulu ambalwa ezikhululo ezisisiseko ukufezekisa ukhuseleko olufanayo. Emva kwexesha elide emthunzini, i-450MHz frequency band ngoku ingumqolo wokubeka iliso nokulawula iziseko ezingundoqo ezifana neziguquli, iindawo zothumelo, kunye nokugada amasango emitha ahlakaniphile. Uthungelwano lwe-450 MHz lwakhiwe njengothungelwano lwabucala, lukhuselwe ngodonga lomlilo, oluqhagamshelwe kwihlabathi langaphandle, oluthi ngokwendalo yalo lubakhusele kuhlaselo lwe-cyber.
Ekubeni i-450 MHz i-spectrum yabelwe abaqhubi babucala, iya kunceda ngokukodwa iimfuno zabaqhubi beziseko ezingundoqo ezifana nezixhobo kunye nabanini bothungelwano lokuhambisa. Usetyenziso oluphambili apha luya kuba ludibaniso lwezinto zothungelwano kunye neerotha ezahlukeneyo kunye namasango, kunye neengcango zeemitha ezihlakaniphile zamanqaku abalulekileyo okulinganisa.
Ibhendi ye-400 MHz isetyenziswe kuthungelwano lukawonkewonke kunye nolwabucala iminyaka emininzi, ngakumbi eYurophu. Umzekelo, iJamani isebenzisa i-CDMA, ngelixa uMntla Yurophu, iBrazil kunye ne-Indonesia zisebenzisa i-LTE. Amagunya aseJamani asanda kubonelela icandelo lamandla nge-450 MHz ye-spectrum. Umthetho umisela ulawulo olukude lwezinto ezibalulekileyo zegridi yamandla. EJamani kuphela, izigidi zezinto zenethiwekhi zilinde ukudityaniswa, kwaye i-spectrum ye-450 MHz ilungele oku. Amanye amazwe aya kulandela, ewathumela ngokukhawuleza.
Unxibelelwano olubalulekileyo, kunye neziseko ezingundoqo ezibalulekileyo, yimarike ekhulayo eya iphantsi kwemithetho njengoko amazwe esebenza ukunciphisa impembelelo yawo yokusingqongileyo, ukunikezelwa kwamandla akhuselekileyo, kunye nokukhusela ukhuseleko lwabemi bawo. Abasemagunyeni kufuneka bakwazi ukulawula iziseko ezingundoqo, iinkonzo ezingxamisekileyo kufuneka zilungelelanise imisebenzi yazo, kwaye iinkampani zamandla kufuneka zikwazi ukulawula igridi.
Ukongeza, ukukhula kwezicelo zedolophu ezihlakaniphile kufuna uthungelwano oluzinzileyo ukuxhasa inani elikhulu lezicelo ezibalulekileyo. Le ayiseyiyo impendulo nje kaxakeka. Uthungelwano lonxibelelwano olubalulekileyo ziziseko ezingundoqo ezisetyenziswa rhoqo nangokuqhubekayo. Oku kufuna iimpawu ze-LTE 450, ezifana nokusetyenziswa kwamandla aphantsi, ukugubungela ngokupheleleyo, kunye ne-LTE bandwidth ukuxhasa ukuhanjiswa kwe-audio kunye nevidiyo.
Izakhono ze-LTE 450 ziyaziwa kakhulu eYurophu, apho imboni yamandla ibonelele ngempumelelo ukufikelela kwi-450 MHz band ye-LTE Low Power Communications (LPWA) usebenzisa ilizwi, umgangatho we-LTE kunye ne-LTE-M kwi-3GPP Release 16 kunye i-narrowband ye-Intanethi yezinto.
Ibhendi ye-450 MHz ibe yingxilimbela yokulala yonxibelelwano olubalulekileyo kwi-2G kunye ne-3G. Nangona kunjalo, ngoku kukho umdla ohlaziyiweyo njengoko iibhendi ezijikeleze i-450 MHz zixhasa i-LTE CAT-M kunye ne-NB-IoT, zizenza zilungele izicelo ze-IoT. Njengoko oku kuthunyelwa kuqhubeka, inethiwekhi ye-LTE 450 iya kukhonza izicelo ezininzi ze-IoT kunye namatyala okusebenzisa. Ngeziseko ezingundoqo eziqhelekileyo nezisoloko zikho, luthungelwano olufanelekileyo kuthungelwano lwanamhlanje olubalulekileyo. Ikwahambelana kakuhle nekamva le-5G. Yiyo loo nto i-450 MHz inomtsalane ekuhanjisweni kwenethiwekhi kunye nezisombululo zokusebenza namhlanje.
Ixesha lokuposa: Sep-08-2022
