HSDPA - ndichiyani? HSDPA amakakamizidwa shutdown

Sayansi ya mkulu-liwiro paketi mwayi kudzera wodzipereka athandizira njira - kotero waima HSDPA. Ndichiyani nanga ubwino wa mtundu uwu lero tikudziwa ochepa owerenga, koma ubwenzi zachilendo lero. Ndipo ngati zaka zingapo zapitazo, akatswiri ambiri ankaganiza yekha za icho chiri ndi wotani m'tsogolo akhoza kudikira mtundu uwu, koma tsopano olembetsa wamba zikukangalika ntchito pawiri chotero, chomwe ndi anagawira monga 4G «m'badwo wachinayi kugwirizana."

Nchifukwa Chiyani Kumafunikira?

The vuto chonse munda Intaneti lachitatu mbadwo uli, kuziyika izo modekha, yowawitsa, ndicho chifukwa chachikulu chimene anthu ambiri ogwira ntchito ndi chidwi HSDPA kugwirizana. Kodi izo - owerenga sindikudziwa, koma 4G chidule kukopa kwambiri 3G, chifukwa amaona ngati mofulumira ndi zambiri zipatso.

anthu ochepa mukudziwa kuti mu 2000s oyambirira mu ntchito Europe CDMA ndi HSDPA ndawapatsa kuposa $ 100 biliyoni. Pakuti n'cholinga choti chiphaso kwa analamula Intaneti lachitatu m'badwo. Choncho, kuchuluka kwa makampani ma anali zakuthambo mangawa, moti pamapeto chabe kothawira. Ndipotu, mfundo ndi yakuti mpaka posachedwapa, msika ambiri, panalibe 3G-mafoni, choncho panalibe njira imbani nambala Napempha kwa olembetsa panopa, zomwe adzalola kuti akhalenso ndalama pa.

HSDPA - a m'manja Internet lero

Kumene, posachedwapa anayamba chitukuko yogwira mwa makampani amenewa, omwe pa nthawi ina padera mu dera 3G, komanso HSDPA. Ndi chiyani icho? Izi patukani ambiri matelefoni imene mwayi ntchito 3G monga polumikizira yogwira Internet, ndi processing mofulumira kwambiri za nkhani zosiyanasiyana kudzera maukonde. Mu nthawi yathu pafupifupi foni yamakono, limene linatuluka mu zaka zingapo zapitazi, pa maziko kuvomerezedwa ndi okonzeka ndi mwayi kwa 3G. Inde, pa ubiquity Intaneti kukhala zosaganizika ntchito pang'onopang'ono mankhwala akale ena kuposa liwiro otsika kwambiri.

Amachigwiritsa ntchito?

Mu msika mafoni kwambiri ndipo nthawi zambiri zimayamba kuoneka zipangizo amene, kuwonjezera 3G, HSDPA luso nawonso amapereka. Ndichiyani nanga ubwino wa njira imeneyi pa GPRS, mapulogalamuwanso zotsogola zambiri sadziwa anthu ambiri amafunsa funso lomveka: ndi ubwino kugula foni, ndipo kaya lidzakhala waphindu mawu a Intaneti.

Ambiri amakonda kuganizira njira imeneyi monga gawo Transitional kuti zopezera mkulu-liwiro otchedwa 4G, kuyambira maukonde ukugwirira ntchito bwino zinthu m'tawuni ndi mosavuta ntchito m'nyumba.

ndi ubwino wake chiyani?

Njira imeneyi zimathandiza inu imodzi kutumikira angapo ogwiritsa pogwiritsa ntchito luso multiplexing ndi nthawi, ndi kugawa code. HSDPA chachikulu ntchito mfundo - deta kwambiri, liwiro apamwamba. Ndicho chimene chimapangitsa maukonde mmodzi mwa yoyenera kwambiri kusamalira magalimoto likukulira owerenga angapo.

Pa mtima izi Zipangizo zamakono zathandiza zotsatirazi zinthu:

• Dziphunzitsiranso 'kala' ikusonyeza chiwembu ndi QPSK kusinthasintha mawu ndi 16 QAM.
• Apadera kulandirana protocol.
• Wopitiriza chizindikiritso cha patsogolo magalimoto pa mfundo B ntchito protocol Mac-liwilo.

Njira imeneyi anamasuliridwa matumizidwe ophatikizika amawu, nyimbo ndi zithunzi ntchito za- kuposa watsopano, kulola kuti azilandira ntchito kugwirizana kwambiri mofulumira. Ichi ndi chifukwa chakuti, chifukwa cha mfundo zabwino kutumiza ndalama zambiri, anapereka zochepa yomweyo, koma ichi kumawonjezera voliyumu deta anatumizidwa.

bwanji ntchito?

Kufotokozera ndi mfundo HSDPA kuwulula Cholinga cha maukonde - ndi kuonetsetsa pazipita kothandiza kugwiritsa ntchito wailesi sipekitiramu mu utumiki wa ntchito zosiyanasiyana, omwe kungadzutse kufunika kwambiri mkulu-liwiro nzeru ogwiritsa deta kupyolera mu njira downlink, monga Intaneti, komanso owona Kwezani.

maukonde anali koyamba kwa owerenga nthawi yoyamba 3GPP muyezo, Baibulo wachisanu. Theoretically, ndi kukula kwake selo dekhetsa ntchito njira imeneyi n'zotheka kupereka mlingo wa pafupifupi 10 Mbit / s. mkulu kwambiri liwiro phindu malire amenewa ndi 14,4 Mbit / s, koma kukwaniritsa liwiro ili pafupi zosatheka.

Anasintha chitukuko cha 3GPP mfundo imatsogoleredwa kuonjezera malire liwiro, limene kudzakhala kotheka kuti anthu pa nthawi adzayamba kufika 20-30 Mbit / s. Kuthandiza kukwaniritsa mfundo awa a mathamangidwe ayenera MIMO mbali, komanso njira zatsopano za ntchito mlongoti magulu.

Ndiyenera ntchito?

Tsopano pa mlingo othandiza anazindikira imathamanga mpaka 42 Mbit / s, ndi chiphunzitso, pamene udzachitika 11 amasulidwe muyezo 3GPP, liwiro adzakhala kale kukhala pafupifupi 337 Mbit / s. Pakali pano, nthawi zonse pa Intaneti UMTS HSDPA 3G, koma liwiro akadali masamba kwambiri wolakalakika, ngakhale kuti mafoni zipangizo ndi zoposa zovomerezeka.

Chifukwa deta wabwino mtokoma, mkulu khalidwe kugwirizana okhazikika ndi ntchito pafupifupi mosadodometsedwa wa mtundu uwu tingathenso kwathunthu kusintha chifaniziro cha ogwiritsa osiyana chida kuti ndi wachitatu m'badwo pawiri. Pa nthawi yomweyo ena ntchito Nthawi zambiri HSDPA amakakamizidwa shutdown, zimenezi zosasangalatsa ndithu.

WCDMA kapena HSDPA?

Capacious kuchepetsa 3G zikuphatikizapo ambiri umisiri amaphatikizidwa pansi pa mutu wa "m'badwo wachitatu pawiri." Makamaka ambiri ndi kutali ndi WCDMA ndi HSDPA, amene kubisala pansi zosiyanasiyana umisiri kulankhulana, zokhudzana kwenikweni kwa m'badwo wachitatu, koma ndi osiyana kwambiri.

Ngati tikambirana fanizirani umisiri awa, HSDPA patsogolo kwambiri, ndipo n'zosadabwitsa, chifukwa anayamba kupanga penapake kenako poyerekeza WCDMA ndi limalola kugwirizana apamwamba liwiro. Choncho, ngati luso lamakono amapereka liwiro zosaposa 3.6 Mbps, ndi HSDPA chiphunzitso ndi zonse kungakhale pafupifupi 42 Mbit / s, ngakhale kuchita makhalidwe amenewa, indedi, kutali kukhala otero. Tikumbukenso kuti kugwirizana mtundu uwu akhoza anangomutchula HSPA, kuimira mgwirizano wa akamagwiritsa awiri - HSUPA ndi HSDPA. HSUPA ndi HSDPA chiri, mu Baibulo ili? Izi mathamangitsidwe munthawi yomweyo kugwirizana kucheza ndi ukubwera.

Chabwino n'chiti?

Zochita kovuta kusankha chimene akadali bwino, ndi kuti zikhonza kuvotera WCDMA ndi, HSDPA Intaneti zimenezo, malinga ndi vuto ndi zosowa. Kusankha pakati pa Intaneti amenewa nthawi zambiri eni ndi 3G-modemu amathandiza akamagwiritsa awiri basi, komanso olumikizidwa kwa iye woyendetsa. Muzu kusinkhasinkha kumeneku anthu akhoza chifukwa chosiyana mtendere kapena ❖ kuyanika chosadziwika kukhalapo. Tikumbukenso kuti nthawi zina pamakhala anthu zinthu kumene nyumba chimodzimodzi ntchito ndi kulankhula muyezo, pamene mu chipinda china ntchito kokha WCDMA. Tiyeneranso ananena kuti kusinthitsa pafupipafupi zingakhale zovuta kukachitika kuti amafuna kugwirizana mosalekeza, ndipo ayenera kuonedwa.