Kuyini ifoni 3G, futhi iyobasiza kanjani kithi

Siphila and move emhlabeni kolwazi ageleza, okwenza inqwaba Amakholi efoni, alikho ehhovisi noma ekhaya njalo, e ngandlela-thile lapho bebhekene 3G okujwayelekile (emelela ukuthi amaNgisi. "Isizukulwane Okwesithathu"). Ake sizibuze: "Yini ifoni 3G?"

Europe guided ekhethekile "lwesigodi" esibekiwe ejwayelekile - UMTS, emele ebucayini phakathi engcono CDMA ejwayelekile nokuba semali camera GSM ababhalisile. 3G amanethiwekhi usebenza uhla UHF ka mayelana 2 GHz nge rate idatha ye 3.1 Mbit / s. Izidingongqangi ngoba 3G-amanethiwekhi zibalwa njengoba izwi kanye nedatha ukuxhumana. Ezibucayi senhlobo yetinsita endzaweni yobumfihlo ongaphakeme, bekhumbula ejwayelekile langaphambilini, abaqondi ukuthi yini 3G ifoni namuhla. Namuhla ukuthumela idatha inikeza zokuxhumana njengoba ububanzi ibhizinisi ngesivinini (e-mail, video umhlangano, ukungena kokukude yolwazi, ukuphathwa yebhange akhawunti), futhi izithakazelo siqu (imidlalo, ukuxhumana nomphakathi, izinhlelo multimedia, ukuthenga inthanethi). Transmission izinga kuyahlukahluka inversely ngejubane into. Endabeni ekutholeni esikhundleni - 2048 kbit / s, kuyilapho speed 3km / h - 348 kbit / s, 120 km / h - 144 kbit / s. Okudumile kwabasebenzisi be ukujabulela angenamkhawulo mobile Inthanethi, alinikela kubo ithuba okwesikhathi esinqunyiwe ngenyanga Imali ukufinyelela okungenamkhawulo inethiwekhi global. Abaningi banesithakazelo lo mbuzo: "Indlela engcono kakhulu ukhethe i-opharetha?" Impendulo yalo ilula. Okokuqala, bheka ukuthi ngabe weneliseka Ukusabalala endaweni yayo. Khona-ke ukuhlola umhlinzeki amazinga. Khona-ke wenze isinqumo.

Kodwa 3G inthanethi - kuyini? Akukhona nje omakhalekhukhwini. Uma une-PC, netbook, notebook, bese uxhuma uxhumano lwe-Wi-Fi udinga 3G-imodemu. Ulamula kakhulu ye-USB imodemu, okuyinto USB-port kwikhompyutha ixhuma ngokuqondile. Ngaphezu kwalokho kuba embodiments kungenzeka ExpressCard, PCMCIA. Ukuze okwalandela okuthembekile reception Ukukhetha isignali izinga olunezimiso yokubika devaysa yayo imvamisa uhla, isivinini isignali yokudlulisela. Nokho, uma eliseduze umbhoshongo umhlinzeki iseduze. Lapho ibanga 10-50 km umsebenzi imodemu esitebeleni sizonikeza yokwenziwa 3G-antenna. amabutho Yangaphakathi yona 5-10 decibel angu, kodwa ngezinye izikhathi kudingeka sangaphandle, namandla kakhulu. Ukuze wenze lokhu, ungase futhi kube wusizo 3G-Wi-Fi yakho. Sicela uqaphele ukuthi ngenxa ezintathu imvamisa bands 3G Inthanethi: 450, 800, 2100 MHz - akhethiwe imodemu okuhambisanayo ne-antenna.

Ngokushesha ekuthuthukiseni emakethe Smartphones zanamuhla futhi abaxhumanisi. Lokhu "zakudala" Isobho, efanekisa ukuthi kule foni 3G. Basuke, ngaphezu ukuqaliswa ukuxhumana yezwi, anemisila esakhelwe 3G imodemu, silondoloze ukuxhumana ne WWW. On the elidlula intuthuko kukhona HTC Samsung (yesikhulumi Android) kumadivayisi ne-Apple (operating system iOS).

Manje kuyanda phakathi abasebenzisi kumadivayisi eselula anezibonisi emikhulu - amaphilisi. Lolu cingo lungase zimumethe i 3G imodemu ihlanganiswe (okuyinto Kunconywa, ikakhulukazi uma umenzi - China) - uma kungenjalo, khona-ke udinga ukuthenga ke. Kungenzeka ukuthi "ukwehluleka" Abashayeli eceleni uthenge imodemu.

Dialectics of revolution kwezesayensi nakwezobuchwepheshe, ngokujulile ososayensi umbuzo "Yini 3G ifoni" siye sabangela esigabeni esilandelayo - 4G. Naphezu amandla akhona, 3G - kuphela isigaba esisodwa yentuthuko global. 4G ubuchwepheshe, okuyinto has elinye igama - LTE (Long TermEvolution), ukuthuthukisa amanethiwekhi akhona, okwandisa ijubane nokuphakama kwezwi kolwazi ngocansi. Norway Sweden kanye baye bahlahla indlela ubuchwepheshe obusha. ukuthuthukiswa Ngaphezu kwalokho akukho okunye: Russian base abahlinzeki "Beeline" futhi MTS, "megaphone" kakade umsebenzi uqalile ngokuvumelana isivumelwano samazwe se-nezokuxhumana esezingeni LTE.