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    A 2.4G WiFi Protocol Standard

    Nthawi yotumiza: May-06-2022

    2.4G WiFi imagwira ntchito mu bandi ya 2.4GHz yokhala ndi maulendo afupipafupi a 2400 ~ 2483.5MHz. Mulingo waukulu wotsatiridwa ndi IEEE802.11b/g/n yokhazikitsidwa ndi IEEE (Association of Electrical and Electronics Engineers).Nazi njirazi mwatsatanetsatane:

    • IEEE802.11 ndi mulingo wa LAN wopanda zingwe womwe unapangidwa ndi IEEE. Amagwiritsidwa ntchito makamaka kuthetsa mwayi wopezeka opanda zingwe kwa ogwiritsa ntchito ndi malo ogwiritsira ntchito muofesi ya LAN ndi ma network a campus. Utumiki umakhala wochepa kwambiri pakupeza deta, ndi mlingo waukulu wa 2Mb / s.Tekinoloje iyi ndi yachikale chifukwa IEEE802.11 ndiyosakwanira mulingo ndi mtunda wotumizira.
    • Muyezo wa IEEE802.11b, womwe umadziwikanso kuti teknoloji yopanda zingwe zopanda zingwe, umagwiritsa ntchito bandi yaulere ya 2.4GHz yomwe imayendetsedwa padziko lonse lapansi kuti ikule molunjika, ndi 83.5MHz m'lifupi ndi 11Mbps. mamita m'nyumba popanda kulowa m'nyumba, yomwe ndi njira yotumizira opanda zingwe yomwe imagwiritsidwa ntchito kwambiri pano.
    • IEEE802.11g ndi mulingo wosakanizidwa womwe umatengera mulingo wanthawi zonse wa 802.11b ndipo umapereka mitengo yotumizira ma data ya 11Mbps pa sekondi iliyonse pa 2.4GHz. Imagwiritsa ntchito matekinoloje owonjezera monga ma-dual-channel bundling, omwe amathandizira bandwidth yotumizira mawayilesi kukhala 108Mbps ndipo imatha perekani kutulutsa kwenikweni kwa TCP / IP pakati pa 80 ndi 90Mbps.
    • IEEE802.11n imagwiritsa ntchito luso la MIMO (multi-in and multi-out) ndi OFDM (orthogonal frequency division multiplexing) teknoloji, yomwe imatha kupititsa patsogolo kufalikira kwa WLAN kuchokera pa 54Mbps yamakono yoperekedwa ndi 802.11a ndi 802.11g mpaka 108Mbps, ngakhale mpaka 600Mbps , ndipo imatha kuthandizira kufalitsa kwamawu ndi makanema apamwamba kwambiri.

    Kuyerekeza kwa njira za 802.11b/g/n

     

    m'badwo wachiwiri

    m'badwo wachitatu

    M'badwo wachinai

    muyezo

    IEEE802.11b

    IEEE802.11g

    IEEE 802.11n

    njira yosinthira

    Mtengo CCK

    BPSK, QP SK, 160AM, 64QAM, DBPSK, DQPSK,

    BPSK, QPSK, 160AM, 64QAM

    Mtundu wa encoding

    DSSS

    OFDM, DSSS

    MIMO-OFDM

    liwiro

    11 Mbps

    54 Mbps

    600Mbps

    bandwidth njira

    22MHz

    20MHz

    20, 40MHz

    Tsiku lovomerezeka

    1999

    2003

    2009

    khalidwe

    Zotsika mtengo, zodziwika bwino

    miyezo, luso

    ndi mankhwala

    okhwima

    Mphamvu zochepa zachibale

    kudya, kutalika

    mtunda wotumizira, wamphamvu

    mphamvu yolowera, yaying'ono

    kuphimba, kuchuluka kwakukulu

    Pansi-zogwirizana ndi

    11b / g pamene mukugwira ntchito

    2.4G

    Shenzhen HDV Photoelectron Technology Ltd. ndi katswiriONUWopanga zida za / ONT ndiwolankhulanso mwanzeruONUwopanga module, kampani yathu pano ikugulitsa zida zosiyanasiyana zoyankhulirana zapamwamba komanso pansi, monga, Fiber Media Converter, Efaneti.kusintha, OLTzida,ONUzida ndi zina zotero. Ngati mukufuna kudziwa zambiri zaukadaulo wolumikizirana, talandiridwa kuti mutilankhule nthawi iliyonse.



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