2.4GWiFi ua haujlwm hauv 2.4GHz zaus band, nrog ntau zaus ntawm 2400-2483.5MHz. Tus qauv tseem ceeb ua raws yog IEEE802.11b/g/n tus qauv tsim los ntawm Lub Tsev Haujlwm Saib Xyuas Hluav Taws Xob thiab Hluav Taws Xob (IEEE). Hauv qab no, peb yuav muab cov ncauj lus kom ntxaws txog cov qauv no:
• IEEE802.11 yog ib qho wireless hauv cheeb tsam network tus qauv tsim los ntawm IEEE, feem ntau yog siv los daws cov kev siv wireless rau cov neeg siv thiab cov neeg siv cov terminals hauv chaw ua haujlwm thiab tsev kawm ntawv network. Kev lag luam tsuas yog txwv rau cov ntaub ntawv nkag, thiab qhov siab tshaj plaws tuaj yeem ncav cuag 2Mb / s. Vim qhov tsis muaj peev xwm ntawm IEEE 802.11 kom tau raws li tib neeg cov kev xav tau ntawm kev ceev thiab kev sib kis deb, cov cuab yeej siv no yog qhov qub.
• Tus qauv IEEE802.11b, tseem hu ua wireless fidelity thev naus laus zis, siv thoob ntiaj teb lees paub 2.4GHz dawb zaus band rau ncaj qha sib kis spectrum, nrog bandwidth ntawm 83.5MHz thiab cov ntaub ntawv xa tawm siab tshaj plaws ntawm 11Mbps. Kev sib kis ntau yam tsis muaj kev nthuav tawm yog mus txog 300 meters sab nraum zoov thiab mus txog 100 meters hauv tsev yam tsis muaj teeb meem, ua rau nws siv ntau tshaj plaws wireless kis raws tu qauv niaj hnub no.
• IEEE802.11g yog tus qauv hybrid uas yoog raws li tus qauv 802.11b ib txwm muaj thiab muab cov ntaub ntawv hloov pauv ntawm 11Mbps ib ob ntawm 2.4GHz zaus. Nws txais cov thev naus laus zis zoo xws li kev sib txuas ntawm ob lub xov tooj sib txuas, uas ua rau kom lub wireless channel xa tawm bandwidth mus rau 108Mbps thiab tuaj yeem muab TCP / IP tiag tiag los ntawm 80 txog 90Mbps.
• IEEE802.11n txais MIMO (Multiple In Multiple Out) thiab OFDM (Orthogonal Frequency Division Multiplexing) technologies, uas tuaj yeem ua rau nce tus nqi sib kis ntawm WLAN los ntawm 54Mbps muab los ntawm tam sim no 802.11a thiab 802.11g rau 108Mbps, thiab txawm tias nce mus txog 108Mbps, tuaj yeem txhawb nqa lub suab zoo thiab kev sib kis video.
| Kev sib piv ntawm 802.11b/g/n qauv | |||
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| tiam thib ob | tiam peb | Plaub tiam |
| txheem | IEEE 802.11b | IEEE 802.11g | IEEE 802.11n |
| txheej txheem modulation | CCK | BPSK, QPSK, 160AM, 64 QAM, DBPSK, QWB, | BPSK, QPSK, 160AM, 64 QAM |
| Hom encoding | DSSS | OFDM, DSSS | MIMO-OFDM |
| ceev | 11 Mbps | 54Mbps ua | 600 Mbps |
| Channel bandwidth | 22 MHz | 20 MHz | 20, 40 MHz |
| Hnub pom zoo
| Xyoo 1999 | Xyoo 2003 | Xyoo 2009 |
| yam ntxwv | Tus nqi qis, lub ntsiab cov qauv, paub tab technology thiab cov khoom | Tsawg zognoj,kis tau tus mob ntev nyob deb, muaj zog nkag mus, kev pab me me, thiab kev kub ceev
| Thaum ua haujlwm ntawm 2.4g, ua sib haum nqes nrog 11b/g
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Shenzhen Haidiwei Optoelectronics yog cov chaw tsim khoom lag luamONUoptical cat khoom thiab kev sib txuas lus ntseONUoptical miv module. Peb lub tuam txhab tam sim no muag ntau yam khoom siv sib txuas lus nrog kev sib txuas nce thiab nqis, xws li fiber ntau optic transceivers, Ethernet keyboards,OLTOptical Cat khoom,ONUoptical cat khoom, thiab lwm yam. Yog tias koj xav paub ntau ntxiv txog kev paub txog kev sib txuas lus thev naus laus zis, thov koj xav tiv tauj peb lub tuam txhab.