802.11A / B / G / N / N / N / N / N / N / N / N / N / N / N / N / NORTH
Kusukela ukukhishwa kokuqala kwe-WI FI kubathengi ngo-1997, i-WI FI ejwayelekile ibilokhu ivela njalo, ijubane elikhulayo kanye nokunwebeka ukumboza. Njengoba imisebenzi yengezwe ekilasini lokuqala leeeee 802.11 ejwayelekile, babuyekezwa ngezichibiyelo zalo (802.11b, 802.11g, njll.)
802.11b 2.4GHz
I-802.11B isebenzisa imvamisa efanayo engu-2.4 GHZ njengezinga lokuqala le-802.11. Ixhasa ijubane elikhulu le-theory lama-MBP ayi-11 kanye nohla olungafika ku-150. Izakhi ezingama-802.11b zishibhile, kepha leli Zinga linesivinini esiphakeme kakhulu futhi esihamba kancane phakathi kwawo wonke amazinga angama-802.11. Futhi ngenxa ka-802.11B esebenza ku-2.4 GHz, izinto zasekhaya noma amanye amanethiwekhi angu-2.4 GHZ WI FI angadala ukuphazamiseka.
802.11A 5GHzz Ofdm
I-Revised Version "A" yaleli Zinga iyakhululwa ngasikhathi sinye nge-802.11B. Kwethula ubuchwepheshe obuyinkimbinkimbi obubizwa nge-Oddm (i-Orthogonal Frequency Division MulteningXingx) ekwakheni amasiginali angenantambo. I-802.11A ihlinzeka ngezinzuzo ezithile ngaphezulu kwe-802.11B: Isebenza ku-5 GHZ Frequency Band Futhi i-bandwidth yayo iphakeme kakhulu kune-802.11b, isibalo semibono engama-54 mbps.
Kungenzeka ukuthi awuzange uhlangane namadivayisi amaningi we-802.1a noma ama-routers. Lokhu kungenxa yokuthi amadivaysi angama-802.11b ashibhile futhi aya ngokuya ethandwa emakethe yabathengi. I-802.11A isetshenziselwa izinhlelo zokusebenza zebhizinisi.
802.11g 2.4GHz OFDM
Isilinganiso se-802.11G sisebenzisa ubuchwepheshe obufanayo be-Ofdm njengo-802.11a. Njengama-802.11A, isekela isilinganiso se-theretical esiphezulu sama-mbps angama-54. Kodwa-ke, njenge-802.11b, isebenza ngokujwayelekile okuhlanganisiwe okungu-2.4 GHZ (ngakho-ke inezinkinga ezifanayo zokuphazamisa njengoba kungu-802.11b). I-802.11g inzuzo ehambisana namadivayisi angama-802.11b: amadivaysi angama-802.11b angaxhuma kumaphoyinti wokufinyelela angama-802.11g (kodwa ngejubane le-802.11b).
Ngama-802.11g, abathengi bathuthuke kakhulu esivinini se-WI FI nokusibekela. Ngaleso sikhathi, uma kuqhathaniswa nezizukulwane ezedlule zemikhiqizo, ama-router angenantambo wabathengi aseba ngcono futhi abe ngcono, ngamandla aphezulu kanye nokumboza okungcono.
802.11n (Wi Fi 4) 2.4 / 5GHz Mimo
Nge-802.11N standard, i-WI FI isiphenduke isheshe futhi ithembeke kakhudlwana. Ixhasa isilinganiso sokudlulisa se-theory se-theoretical sama-mbs angama-300 (kufika kuma-450 mbps lapho usebenzisa izimpondo ezintathu). I-802.11n isebenzisa i-MIMO (Ukufakwa okuningi okukhishwayo okuningi), lapho ama-transmitters / amathopha amaningi asebenza ngasikhathi sinye ngasikhathi sinye noma zombili iziphetho zesixhumanisi. Lokhu kungakhulisa kakhulu idatha ngaphandle kokudinga i-bandwidth ephakeme noma amandla okuhambisa. I-802.11N ingasebenza kuma-2.4 GHZ kanye nama-5 GHZ Frequency band.
I-802.11AC (WI FI 5) 5GHz mu-mimo
I-802.11AC ikhulisa i-WI FI, ngejubane elisukela kuma-433 MBP kuya kuma-gigabits ambalwa ngomzuzwana. Ukufeza lokhu kusebenza, i-802.111 Isebenza kuphela ku-5 GHZ Frequency Band kuphela, isekela kuze kube yimifudlana yendawo eyisishiyagalombili (uma iqhathaniswa nemifudlana emine ye-802.11n), futhi isebenzisa ubuchwepheshe besiteshi, bese isebenzisa ubuchwepheshe obubizwa ngokuthi yi-beamorforing. Nge-Beangforming, izimpondo zingadlulisela ngokuyisisekelo amasiginali omsakazo, ngakho-ke bakhomba ngqo kumadivayisi athile.
Enye intuthuko ebalulekile ye-802.11AC ngumsebenzisi ohlukahlukene (mu-mimo). Yize uMimo eqondisa ukusakazwa okuningi kwiklayenti elilodwa, uMu-Mimo angakwazi ukuqondisa kanyekanye emifudlaneni yendawo yamakhasimende amaningi. Yize uMu-Mimo engakhuphuli ijubane lanoma yiliphi iklayenti ngalinye, lingathuthukisa ukugcwaliseka kwedatha yonke yenethiwekhi yonke.
Njengoba ukwazi ukubona, ukusebenza kwe-WI FI kuyaqhubeka nokuvela, ngejubane elingase kube khona nokusebenza okusondela kwesivinini esinentambo
802.11ax WI FI 6
Ngo-2018, umfelandawonye we-WiFi wathatha izinyathelo ukwenza amagama ajwayelekile we-WiFi kube lula ukubona nokuqonda. Bazoshintsha okujwayelekile okungu-802.111ax okuzayo ku-WiFi6
Wi fi 6, kukuphi 6?
Izinkomba zokusebenza eziningana ze-WI FI zifaka ibanga lokuhambisa, isilinganiso sokudlulisa, umthamo wenethiwekhi, nempilo yebhethri. Ngokuthuthukiswa kobuchwepheshe kanye nezikhathi, izidingo zabantu ngejubane kanye nomkhawulokudonsa ziya ngokuya ziphezulu.
Kunochungechunge lwezinkinga zokuxhumeka kwendabuko ye-Wi FI, njengokuxinana kwenethiwekhi, ukumbozwa okuncane, kanye nesidingo sokushintsha njalo ama-SSID.
Kepha i-WI FI 6 izoletha izinguquko ezintsha: Ikwenza kahle ukusetshenziswa kwamandla kanye namakhono okumboza amadivayisi, kusekela i-turnios ephakeme yabasebenzisi abaningi, futhi kungakhombisa ukusebenza okungcono kwamabanga ashubile.
Sekukonke, kuqhathaniswa nabanduleli bayo, inzuzo ye-WI FI 6 "i-Dual High and Dual ephansi":
Ijubane eliphakeme: Ngenxa yokwethulwa kobuchwepheshe obufana ne-UPALITK MU-Mimo, i-1024QAM ukuguqulwa, kanye ne-8 *mimo, ijubane elikhulu le-Wi FI 6 lingafinyelela ku-9.6GBBS, okuthiwa lifana nejubane le-stroke.
Ukufinyelela okuphezulu: Ukuthuthuka okubaluleke kakhulu kwe-Wi FI 6 ukunciphisa ukugcwala futhi kuvunyelwe amadivaysi amaningi ukuxhuma kwinethiwekhi. Njengamanje, i-Wi FI 5 ingakwazi ukuxhumana namadivayisi amane ngasikhathi sinye, ngenkathi i-Wi FI 6 izovumela ukuxhumana namadivayisi amaningi ngasikhathi sinye. I-Wi FI 6 futhi isebenzisa i-Ordma (i-Orthogonal Frequency-Division Multiple Explovent Multiple) kanye nobuchwepheshe bezimpawu eziningi zesiginali be-bungform ezivela ku-5G ukuthuthukisa ukusebenza kahle kwenethiwekhi kanye nenethiwekhi ngokulandelana.
I-Latency ephansi: Ngokusebenzisa ubuchwepheshe obufana ne-Oddma ne-Spatialiaseuse, i-Wi FI 6 inika amandla abasebenzisi abaningi ukuthi badlulise ngokufana ngesikhathi sokulandelana, basuse ukuncintisana, ukunciphisa ukusebenza kahle. Kusuka kuma-30ms we-Wi FI 5 kuya ku-20ms, ngokuncishiswa kwesilinganiso sama-33%.
Ukusetshenziswa kwamandla okuphansi: I-TWT, elinye ubuchwepheshe obusha ku-Wi FI 6, kuvumela ukuthi i-AP ixoxisane nokuxhumana nama-terminals, ukunciphisa isikhathi esidingekayo ukugcina amasiginali nokucinga amasiginali. Lokhu kusho ukunciphisa ukusetshenziswa kwebhethri nokwenza ngcono impilo yebhethri, okuholela ekunciphiseni okungama-30% ekusetshenzisweni kwamandla esibulalayo.
Kusukela ngo-2012 | Nikeza amakhompyutha abekwe ngokwezifiso ezimboni amaklayenti omhlaba!
Isikhathi sePosi: Jul-12-2023
