WiMAX vs WiMAX 2
WiMAX thiab WiMAX 2 ob leeg yog wireless broadband technologies kom xa cov ntaub ntawv siab thiab qis latency. WiMAX twb tau siv lawm thiab WiMAX 2 yog nyob rau theem kev txhim kho. WiMAX belongs rau IEEE 802.16 tsev neeg thiab 802.16d thiab 802.16e twb nyob rau hauv qhov chaw. WiMAX 2 yog tsim los ntawm 802.16m thiab uas yog rov qab sib xws nrog WiMAX. Qhov kev cia siab ntawm WiMAX 2 yog xa ntau dua 100 Mbps ntawm lub cuab yeej thaum nyob ntawm kev txav mus los ntawm 500 km / h.
WiMAX 2 (Wireless Interoperability rau Microwave Access, IEEE 802.16m)
WiMAX 2 yog tus ua tiav ntawm WiMAX thiab ua raws li IEEE 802.16m tus qauv. WiMAX yuav tsum muab lub peev xwm ntau dua 802.16 nrog rov qab sib raug zoo nrog WiMAX Air Interface R 1.0 thiab R 1.5. WiMAX 2 xav kom xa ntau dua 1000 Mbps nrog qis lossis tsis muaj kev txav mus los thiab ntau dua 100 Mbps nrog kev txav mus los nrog qis latency thiab muaj peev xwm VoIP nce ntxiv.
Nws yog qhov kev daws teeb meem zoo tshaj plaws los muab kev sib txuas hauv internet ceev rau cov chaw nyob deb nroog thiab nws yog qhov kev xaiv zoo tshaj plaws rau kev rov qab kho cov chaw ua haujlwm hauv zos lossis chaw nres tsheb txawb. Qhov no yog qhov kawg kom kawg IP thev naus laus zis.
Feem ntau nws ua haujlwm hauv 450 MHz txog 3800 MHz.
WiMAX (IEEE 802.16)
WiMAX (802.16) (Wireless Interoperability rau Microwave Access) yog 4th Generation mobile nkag tshuab rau kev nkag mus ceev. Cov qauv tam sim no ntawm cov thev naus laus zis no tuaj yeem muab ib puag ncig 40 Mbps hauv qhov tseeb thiab qhov hloov kho tshiab yuav tsum xa 1Gbps hauv qhov kawg kawg.
WiMAX poob rau hauv IEEE 802.16 tsev neeg thiab 802.16e (1 × 2 SIMO, 64 QAM, FDD) muab 144 Mbps download thiab 138 Mbps upload. 802.16m yog qhov xav tias yuav xa tawm ib ncig ntawm 1Gbps hauv cov ntsiab lus kawg.
WiMAX tau kho cov version thiab mobile version. Qhov ruaj khov WiMAX version (802.16d thiab 802.16e) tuaj yeem siv rau cov kev daws teeb meem dav dav rau hauv tsev thiab tuaj yeem siv rau rov qab cov chaw ua haujlwm nyob deb lossis chaw nres tsheb txawb. Lub WiMAX mobile version (802.16m) tuaj yeem siv los hloov GSM thiab CDMA thev naus laus zis nrog kev cia siab dhau los yog hu ua WiMAX 2.
WiMAX down Link Cov ntaub ntawv tus nqi:
Air Interface R1.0
2 × 2 MIMO 10 MHz TDD - Nyob ib ncig ntawm 37 Mbps
Air Interface R1.5
2 × 2 MIMO 10 MHz TDD - Nyob ib ncig ntawm 40 Mbps
2 × 2 MIMO 20 MHz TDD - Nyob ib ncig ntawm 83 Mbps
2 × 2 MIMO 2 × 20 MHz FDD - Nyob ib ncig ntawm 144 Mbps
Air Interface R2
2 × 2 MIMO 2 × 20 MHz FDD - Nyob ib ncig ntawm 160 Mbps
4 × 4 MIMO 2 × 20 MHz FDD - Nyob ib ncig ntawm 300 Mbps
Qhov txawv ntawm WiMAX thiab WiMAX 2
(1) Yeej ob leeg los ntawm tib tsev neeg IEEE 802.16
(2) WiMAX tuaj yeem muab qhov siab tshaj plaws nyob ib puag ncig 300 Mbps nrog 4 × 4 MIMO whereas WiMAX 2 yuav tsum muaj nyob ib puag ncig 1000 Mbps nrog tsawg zog lossis tsis muaj kev txav mus los.
(3) Latency yuav qis dua hauv WiMAX 2 dua WiMAX, txij li WiMAX los nrog ntau lub peev xwm VoIP.
(4) WiMAX twb launched thiab WiMAX 2 xav tias yuav tsum tau launched tom qab 2011 los yog thaum ntxov 2012
