Ngophuhliso lwetekhnoloji ye-Intanethi, isantya sothumelo lwenethiwekhi siphuculwe kakhulu.Kuthungelwano lwenethiwekhi, i-narrowband kunye ne-broadband zimbini iindlela eziqhelekileyo zokuhambisa.Eli nqaku liza kuchaza umahluko phakathi kwe-narrowband kunye ne-boardband, kwaye uhlalutye iingenelo kunye nokungalunganga nganye.
1.Umahluko phakathi kweNarrowband kunye neBroadband
I-Narrowband kunye ne-broadband zi-teknoloji ezimbini eziqhelekileyo zothumelo lwenethiwekhi, kwaye umahluko omkhulu phakathi kwabo sisantya sothumelo kunye ne-bandwidth.
I-Narrowband ichazwa ngokubanzi njengendlela yonxibelelwano enesantya esicothayo sothumelo kunye ne-bandwidth emxinwa.Ukuhanjiswa kweNarrowband kunokuhambisa kuphela inani elincinci ledatha, kwaye ifanelekile kwezinye iimeko ezilula zesicelo, njengefowuni kunye nefeksi.Itekhnoloji yokuhanjiswa kweNarrowband ilula kwaye iphantsi kweendleko, kodwa isantya sothumelo siyacotha kwaye asikwazi ukuhlangabezana neemfuno zothumelo lwesantya esiphezulu ezifana nokuhanjiswa kwedatha enkulu okanye ividiyo enengcaciso ephezulu.
I-Broadband ibhekisa kwindlela yonxibelelwano enesantya esikhawulezayo sothumelo kunye ne-bandwidth ebanzi.I-Broadband inokusasaza iindidi ezininzi zedatha ngexesha elinye, njengelizwi, ividiyo, umfanekiso, njl. njl. unxibelelwano oluphakathi kwetekhnoloji yothumelo lweBroadband ihambele phambili ngakumbi kunebhanti encinci, inokuqinisekisa uzinzo losasazo kunye nokhuseleko, kwaye iye yaba yeyona ndlela iphambili yothumelo kwixesha langoku le-Intanethi.Ngokubanzi, i-narrowband kunye ne-broadband zineenzuzo zabo kunye nokungalunganga.Yeyiphi indlela yothumelo oyikhethayo ixhomekeke kwiimfuno zokwenyani.
Ukusuka kwimbono yengqiqo, "umxinwa" kunye "nobubanzi" zizinto ezihambelanayo, akukho mda wamanani ongqongqo, kwaye zizimpawu zetshaneli ezinxulumene neempawu zomqondiso.Umahluko phakathi kwezi zimbini ngolu hlobo lulandelayo: ① "Uphawu oluza kuhanjiswa" lubizwa ngokuba ngumthombo.Isibonakaliso somthombo esine-bandwidth encinci kakhulu kune-frequency ye-center ye-carrier yisignali ye-narrowband, kwaye ngokuchaseneyo, isibonakaliso esinobukhulu obufanayo bubizwa ngokuba yi-broadband signal.②Isixhobo sebhendi yefrikhwensi eyabelwe wena + indawo yokusasaza yokwenyani, siyibiza ngokuba sisitishi.Okukhona banzi banzi izibonelelo zebhendi yefrikhwensi kwaye uzinzile ngakumbi imeko-bume yosasazo, iphezulu ireyithi yedatha enokuqhutywa ngumjelo.③ Ukusuka kwi-spectrum ye-waveform, i-bandwidth yesignali yi-Δf, kunye ne-frequency carrier fc.Xa Δf <
Ukuyibeka ngokulula, umahluko omkhulu phakathi kwebroadband kunye ne-narrowband yi-bandwidth.Akukhona nje kuphela ukuba i-Federal Communications Commission yase-United States inika iinkcazo ezifanelekileyo kule nto kwi-2015, kodwa kwakhona yacaciswa kwi-World Telecommunications Day kwi-2010 ukuba i-bandwidths engaphantsi kwe-4M ibizwa ngokuba yi-narrowband, kwaye kuphela i-bandwidths enkulu kune-4M okanye ngaphezulu ingaba. ebizwa ngokuba yibroadband.
Yintoni i-bandwidth?
Igama elithi bandwidth ekuqaleni libhekisa kububanzi bebhendi ye-electromagnetic wave.Ukubeka ngokulula, ngumahluko phakathi kweyona ndawo iphezulu kunye neyona iphantsi yophawu.Okwangoku, isetyenziselwa ukuchaza umlinganiselo ophezulu apho inethiwekhi okanye umgca unokudlulisa idatha.Kwishishini lonxibelelwano lonxibelelwano, abantu abaninzi bayithelekisa nomgwaqo omkhulu, inani ledatha ehanjiswa kumgca ngaphakathi kwexesha elithile.
Iyunithi eqhelekileyo ye-bandwidth yi-bps (bit ngesekhondi), inani leebhithi ezinokuhanjiswa ngesekhondi.I-Bandwidth yingcamango engundoqo kwiinkalo ezifana nethiyori yolwazi, irediyo, unxibelelwano, ukusetyenzwa komqondiso, kunye ne-spectroscopy.
2.Izinto eziluncedo kunye nokungalunganga kwe-narrowband kunye ne-broadband
2.1 Izinto eziluncedo kwi-narrowband
1. Ixabiso lincinci, lilungele izicelo zonxibelelwano oluphantsi.
2. Isebenza kwezinye iindlela zonxibelelwano ezilula, ezifana nomnxeba, ifeksi, njl.
3. Kulula ukuyifaka kunye nokusetyenziswa.
2.2 Izinto ezingeloncedo kwi-narrowband
1. Isantya sokuhambisa sihamba kancinci, kwaye sinokuthumela kuphela isicatshulwa esilula, amanani, njl., kwaye ayifanelekanga ukuhanjiswa kwedatha yobuninzi, njengevidiyo, i-audio, njl.
2. Uzinzo kunye nokhuseleko lokuhanjiswa kwedatha alunakuqinisekiswa.
3. I-bandwidth incinci kwaye umthamo wokuhambisa ulinganiselwe.
2.3Izinto eziluncedo zeBroadband
Itekhnoloji yothumelo lweBroadband inamancedo alandelayo:
Isantya esiphezulu
Itekhnoloji yothumelo lweBroadband inesantya esiphezulu kakhulu sothumelo, esinokuhlangabezana neemfuno zabantu zomthamo omkhulu kunye nokuhanjiswa kwedatha ngesantya esiphezulu.
Umthamo ophezulu
Itekhnoloji yokuhanjiswa kweBroadband inokuhambisa iintlobo ezininzi zemiqondiso ngexesha elinye, iqonde ukudibanisa kunye nokwabelana ngolwazi lwemultimedia, kwaye ibe nomthamo omkhulu wothumelo.
Uzinzo olomeleleyo
Itekhnoloji yokuhanjiswa kweBroadband inciphisa ukuphazamiseka kwetshaneli kunye nengxolo kunye nezinye izinto eziphembelela ngetekhnoloji ye-multiplexing, kwaye iphucula umgangatho wothumelo kunye nokuzinza.
Iyaguquka
I-teknoloji yokuhanjiswa kwe-Broadband inokulungelelanisa kwiindawo ezahlukeneyo zenethiwekhi kunye neemfuno zokuhanjiswa kwedatha, kubandakanywa i-wireless kunye ne-wireless, inethiwekhi yoluntu kunye nenethiwekhi yangasese, njl., kwaye inoluhlu olubanzi lwezicelo.
Ngamafutshane, njengesantya esiphezulu, iteknoloji yothumelo lwedatha enkulu, itekhnoloji yokuhanjiswa kwebroadband inokuqonda ukuhanjiswa okuxutyiweyo kweentlobo ezahlukeneyo zemiqondiso kunxibelelwano olufanayo, kwaye inamathemba osetyenziso olubanzi kunye neemfuno zentengiso.Ukuphuhliswa kobuchwephesha bokusasaza ibroadband kunika abantu iindlela ezikhawulezayo, ezizinzileyo nezisebenzayo zothumelo lwedatha, kwaye kunokuphucula umgangatho kunye nokhuseleko lwenethiwekhi.
2.4 Izinto ezingeloncedo kwiBroadband
1. Ixabiso lezixhobo zokusebenza liphezulu, yaye kufuneka kutyalwe imali eninzi kulwakhiwo nokulondoloza.
2. Xa iziseko zophuhliso zothungelwano kwezinye iindawo zingonelanga, ukuhanjiswa kwe-broadband kunokuchaphazeleka.
3. Kubasebenzisi abathile, i-bandwidth inkulu kakhulu, eyinkcitho yemithombo.
Ngokubanzi, i-narrowband kunye ne-broadband nganye ineemeko ezisebenzayo kunye nezinto eziluncedo kunye nezingeloncedo.Xa ukhetha indlela yokunxibelelana, kufuneka ikhethwe ngokweemfuno zangempela.
Ukuthembela kwiingenelo zayo ezikhethekileyo zothungelwano olungenamkhethe, iimveliso zothungelwano ezizilungelelanisayo ezingenaziko ziye ngokuthe ngcembe zibe yinxalenye yenkqubo yonxibelelwano olungxamisekileyo kwaye zadlala indima ebalulekileyo.Ukwahluliwe kwimbono yobugcisa, iteknoloji ye-non-center ad hoc network iyakwazi ukwahlula-hlulwa ibe yi-"narrowband ad hoc network technology" kunye ne "broadband ad hoc network".
3.1Narrowband Ad Hoc Network Technology
Imelwe yinkqubo yokunxibelelana kwezwi, isithuba sesiteshi se-12.5kHz kunye ne-25kHz ngokuqhelekileyo sisetyenziselwa ukuthwala idatha, enokuxhasa iinkonzo zedatha ephantsi kwesantya kuquka ilizwi, idatha yenzwa, njl. (ezinye zikwaxhasa ukuhanjiswa kwesithombe).Iteknoloji ye-Narrowband ad hoc network isetyenziswa kakhulu kwiinkqubo zokunxibelelana ngelizwi kwiimveliso zonxibelelwano olungxamisekileyo.Izibonelelo zayo zicacile, ezinje ngokuphinda zisetyenziswe kwakhona, ugcino lwemithombo yolwazi, kunye nokuzulazula kwetheminali efanelekileyo;ukhuselo lwengingqi lugqityezelwe ngamakhonkco e-multi-hop;akukho xhulumaniso lweengcingo olufunekayo kwinethiwekhi, kwaye ukuthunyelwa kuyaguquguquka kwaye kuyakhawuleza.
3.2Broadband Ad Hoc Network Technology
Ingqikelelo yomzila luphawu lwetekhnoloji ye-broadband ad hoc network, oko kukuthi, ii-node zinokuhambisa ulwazi kwinethiwekhi ngokwenjongo (i-unicast okanye i-multicast).Nangona i-coverage ye-broadband ad hoc network iphantsi kune-narrowband, ukuxhaswa kwayo kwi-traffic data enkulu (efana nevidiyo yexesha langempela kunye nokuhanjiswa kwezwi) ngundoqo kubukho bayo.Itekhnoloji ye-Broadband ad hoc yenethiwekhi ihlala ine-bandwidth ephezulu ye-2MHz nangaphezulu.Ngaphezu koko, ngokunyuka kwemfuno yedijithali, i-IP kunye nokubonwayo, itekhnoloji ye-broadband ad hoc network nayo iyinxalenye ebalulekileyo yonxibelelwano olungxamisekileyo.
IWAVE unxibelelwanoineqela elizimeleyo lophando lobugcisa kunye neqela lophuhliso kwaye liye laphuhlisa uluhlu lwe-high-bandwidth MESH yeemveliso zenethiwekhi ze-ad hoc, ezinokuthi zidlulise ividiyo kunye nokunxibelelana ngaphandle kwamacingo kumgama omde, kwaye zisetyenziswa ngokubanzi ekukhuseleni umlilo, ukujikeleza, ukuhlangula ngokukhawuleza, kunye nokusasazwa kobuchule bale mihla.Kwaye eminye imimandla, isebenze kakuhle kakhulu.
Ixesha lokuposa: Sep-08-2023
