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 ndi yosakwanira pamlingo wonse ndi mtunda wotumizira.
- Muyezo wa IEEE802.11b, womwe umadziwikanso kuti teknoloji yodalirika yopanda zingwe, imagwiritsa 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 umagwirizana ndi chikhalidwe cha 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 ingathe 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 mawu ndi makanema apamwamba kwambiri.
| Kuyerekeza kwa njira za 802.11b/g/n | |||
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| 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 | Mtengo wotsika, wamba 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 |
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