I-2.4G WiFi isebenza ngebhendi engu-2.4GHz enobubanzi befrikhwensi yokusebenza engu-2400~2483.5MHz. Izinga eliyinhloko elilandelwa yi-IEEE802.11b/g/n elibekwe i-IEEE (Association of Electrical and Electronics Engineers).Nazi lezi zindlela zokunquma ngokuningiliziwe:
- I-IEEE802.11 iyindinganiso ye-LAN engenantambo eyaqalwa yi-IEEE. Isetshenziswa kakhulu ukuxazulula ukufinyelela okungenantambo kubasebenzisi kanye namatheminali abasebenzisi ehhovisi le-LAN namanethiwekhi ekhampasi. Isevisi ikhawulelwe ngokuyinhloko ekufinyeleleni idatha, ngesilinganiso esiphezulu esingu-2Mb / s.Lobu buchwepheshe buphelelwe yisikhathi ngoba i-IEEE802.11 ayanele kukho kokubili izinga kanye nebanga lokudlulisela.
- Izinga le-IEEE802.11b, elaziwa nangokuthi ubuchwepheshe bokuthembeka obungenawaya, lisebenzisa ibhendi yefrikhwensi yamazwe ngamazwe engu-2.4GHz ukuze kunwetshwe ukulandelana okuqondile, ububanzi obungu-83.5MHz kanye nezinga eliphezulu lokudluliswa kwedatha elingu-11Mbps. amamitha endlini ngaphandle kokungeneka endlini, okuyiphrothokholi yokudlulisa okungenantambo esetshenziswa kakhulu manje.
- I-IEEE802.11g iyindinganiso eyingxube evumelana nezinga elivamile le-802.11b futhi inikeza amazinga okudlulisa idatha angu-11Mbps ngomzuzwana ngo-2.4GHz.Isebenzisa ubuchwepheshe obuthuthukisiwe obufana ne-dual-channel bundling, ethuthukisa umkhawulokudonsa wokudluliswa kweziteshi ezingenantambo ube ngu-108Mbps kanye ne-can. hlinzeka ngokuphuma kwangempela kwe-TCP/IP okuphakathi kuka-80 no-90Mbps.
- I-IEEE802.11n isebenzisa ubuchwepheshe be-MIMO (i-multi-in and multi-out) kanye ne-OFDM (orthogonal frequency division multiplexing), engathuthukisa izinga lokudlulisela le-WLAN lisuka ku-54Mbps lamanje elihlinzekwe ngu-802.11a kanye no-802.11g kuya ku-108Mbps, ngisho nokufika ku-600Mbps , futhi ingasekela ukudluliswa kwezwi nevidiyo kwekhwalithi ephezulu.
| Ukuqhathaniswa kwenqubo ye-802.11b/g/n | |||
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| isizukulwane sesibili | isizukulwane sesithathu | Isizukulwane sesine |
| ejwayelekile | IEEE802.11b | IEEE802.11g | IEEE 802.11n |
| i-modulation technique | I-CCK | BPSK,QP SK,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 |
| Usuku lokugunyazwa | 1999 | 2003 | 2009 |
| isici | Izindleko eziphansi, ezijwayelekile amazinga, ubuchwepheshe kanye nemikhiqizo abavuthiwe | Amandla ahlobene aphansi ukusetshenziswa, isikhathi eside ibanga lokudlulisela, eliqinile amandla okungena, amancane ukusabalala, izinga eliphezulu | Iyahambisana ne 11b / g lapho usebenza e 2.4G |
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