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    2.4GWiFi Protocol Standard

    Isikhathi sokuthumela: Apr-04-2023

    I-2.4GWiFi isebenza kubhendi yefrikhwensi engu-2.4GHz, ngebanga lefrikhwensi engu-2400-2483.5MHz. Izinga eliyinhloko elilandelwayo yizinga le-IEEE802.11b/g/n elithuthukiswe yi-Institute of Electrical and Electronics Engineers (IEEE). Ngezansi, sizonikeza isingeniso esinemininingwane kulawa mazinga:

    • I-IEEE802.11 indinganiso yenethiwekhi yendawo engenantambo eyasungulwa ekuqaleni yi-IEEE, ikakhulukazi esetshenziselwa ukuxazulula ukufinyelela okungenantambo kubasebenzisi namatheminali abasebenzisi kumanethiwekhi ehhovisi nekhampasi. Ibhizinisi lilinganiselwe ngokuyinhloko ekufinyeleleni idatha, futhi isivinini esiphezulu singafinyelela kuphela ku-2Mb/s. Ngenxa yokungakwazi kwe-IEEE 802.11 ukuhlangabezana nezidingo zabantu mayelana nesivinini nebanga lokudlulisela, lobu buchwepheshe buphelelwe yisikhathi.

    • Izinga le-IEEE802.11b, elibuye laziwe ngokuthi ubuchwepheshe be-wireless fidelity, lisebenzisa ibhendi yefrikhwensi yamahhala engu-2.4GHz eyaziwa emhlabeni wonke ukuze uthole i-spectrum yokusabalalisa okulandelanayo okuqondile, enomkhawulokudonsa ongu-83.5MHz kanye nezinga eliphezulu lokudluliswa kwedatha elingu-11Mbps. Ibanga lokudluliswa ngaphandle kokusakazwa ngomugqa lingafika kumamitha angama-300 ngaphandle futhi lifike kumamitha ayi-100 ngaphakathi endlini ngaphandle kwezithiyo, okulenza libe iphrothokholi yokudlulisa okungenantambo esetshenziswa kakhulu namuhla.

    • I-IEEE802.11g iyindinganiso eyingxube evumelana nezinga le-802.11b evamile futhi inikeza izinga lokudlulisa idatha elingu-11Mbps ngesekhondi ku-2.4GHz. Yamukela ubuchwepheshe obuthuthukisiwe obufana nokuhlanganisa iziteshi ezimbili, okwandisa umkhawulokudonsa wokudluliswa kwamashaneli angenantambo ube ngu-108Mbps futhi ingahlinzeka ngokuphuma kwangempela kwe-TCP/IP okungu-80 kuya ku-90Mbps.

    • I-IEEE802.11n isebenzisa ubuchwepheshe be-MIMO (Multiple In Multiple Out) kanye ne-OFDM (Orthogonal Frequency Division Multiplexing), obungakhuphula izinga lokudlulisela le-WLAN lisuka ku-54Mbps elihlinzekwe ngu-802.11a wamanje no-802.11g kuya ku-108Mbps, noma ngisho nokukhuphuka okungu-60bM, noma ngisho nangaphezulu ingasekela ukudluliswa kwezwi nevidiyo kwekhwalithi ephezulu.

    Ukuqhathaniswa kwamazinga angu-802.11b/g/n

     

    isizukulwane sesibili

    isizukulwane sesithathu

    Isizukulwane sesine

    ejwayelekile

    IEEE802.11b

    IEEE802.11g

    IEEE 802.11n

    i-modulation technique

    I-CCK

    I-BPSK, QPSK, 160AM,

    64QAM,

    DBPSK,DQPSK,

    BPSK, QPSK, 160AM, 64QAM

    Uhlobo lombhalo wekhodi

    I-DSSS

    OFDM,DSSS

    I-MIMO-OFDM

    isivinini

    11Mbps

    54Mbps

    600Mbps

    Umkhawulokudonsa wesiteshi

    22MHz

    20MHz

    20, 40MHz

     

    Idethi yokugunyaza

     

    1999

    2003

    2009

    isici

    Izindleko eziphansi,

    ejwayelekile

    amazinga,

    ubuchwepheshe obuvuthiwe

    kanye nemikhiqizo

     Amandla aphansi uma kuqhathaniswaukusetshenziswa,ukudluliswa okude

    ibanga,

    ukungena okuqinile,

    ukufakwa okuncane,

    kanye nesivinini esikhulu

     

     Lapho usebenza ku

    2.4G, kungaba

    ehambisanayo

    phansi

    nge 11b/g

     

    I-Shenzhen Haidwiwei Optoelectronics ingumkhiqizi ochwepheshe weI-ONUimishini yekati ye-optical kanye nokuxhumana okuhlakaniphileI-ONUoptical cat module. Inkampani yethu njengamanje ithengisa imishini yezokuxhumana ehlukahlukene enokuxhumana okukhuphuka naphansi, okufana nama-fiber optic transceivers, amaswishi e-Ethernet,OLTimishini yekati yokubona,I-ONUoptical cat imishini, nokunye. Uma ungathanda ukufunda okwengeziwe ngolwazi lobuchwepheshe bezokuxhumana, sicela ukhululeke ukuxhumana nenkampani yethu.



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