WiFi 6, 5G era hauv WiFi

WiFi 6, 5G era hauv WiFi Qhov tseem ceeb tshaj plaws ntawm WiFi 6 thev naus laus zis, Kuv xav tias cov lus qhia no yuav yog qhov kev sib piv zoo tshaj plaws.Peb lub ntsiab tseem ceeb ntawm 5G yog dab tsi?"Ultra-high bandwidth, ultra-low latency thiab ultra-loj muaj peev xwm" - qhov no yuav tsum paub rau txhua tus, tau kawg, muaj kev nkag tau zoo dua hauv kev sib txuas, kev sib txuas hauv network (NBIoT, eMTC, eMMB) muaj nuj nqi kom ua tiav ntau lub network spectrum txaus thiab kev siv bandwidth, cov yam ntxwv no ua rau 5G sib txawv kiag li ntawm 4G ib tiam tshiab ntawm kev sib txuas lus network, uas yog vim li cas "4G hloov lub neej, 5G hloov lub neej".Wb saib ntawm WiFi 6. Tej zaum yuav muaj ntau yam kev txhim kho, thiab cov hlua ntawm cov cim maj mam dhau los ua IEE802.11a/b/g/n/ac/ax, ua raws li ay.Thaum Lub Kaum Hli 4, 2018, WiFi Alliance kuj tseem xav tias lub npe no yeej tsis tsim nyog rau kev txheeb xyuas cov neeg siv khoom, yog li nws tau hloov mus rau txoj kev naming ntawm "WiFi + tus lej": IEEE802.11n rau WiFi 4, IEEE802.11ac rau WiFi 5 , thiab IEEE802.11ax rau WiFi 6. Qhov txiaj ntsig ntawm kev hloov lub npe yog, tau kawg, qhov kev paub yog yooj yim, tus lej loj dua, cov thev naus laus zis tshiab, thiab lub network sai dua.Txawm li cas los xij, txawm tias qhov theoretical bandwidth ntawm WiFi 5 theoretical bandwidth tuaj yeem ncav cuag 1732Mbps (hauv qab 160MHz bandwidth) (qhov 80MHz bandwidth feem ntau yog 866Mbps, ntxiv rau 2.4GHz / 5GHz dual-band kev koom ua ke thev naus laus zis, nws tuaj yeem ncaj qha mus txog Gbps nkag ceev), uas yog ntau. siab dua qhov kev siv Internet ceev ntawm peb lub tsev zoo tib yam broadband 50 500Mbps, nyob rau hauv kev siv niaj hnub peb tseem pom tias muaj feem ntau "fake networking" xwm txheej, uas yog, lub teeb liab WiFi yog tag nrho.Kev nkag mus rau lub network yog ceev li yog tias Is Taws Nem raug txiav.Qhov tshwm sim no yuav zoo dua nyob hauv tsev, tab sis nws muaj feem ntau tshwm sim hauv cov chaw pej xeem xws li chaw ua haujlwm, khw khw thiab chaw sib tham.Qhov teeb meem no muaj feem xyuam rau WiFi kev siv tshuab ua ntej WiFi 6: yav dhau los WiFi siv OFDM - orthogonal zaus division multiplexing technology, uas tuaj yeem pab txhawb ntau tus neeg siv nkag, xws li MU-MIMO, ntau tus neeg siv-ntau cov tswv yim thiab ntau cov zis. , tab sis raws li tus qauv WiFi 5, txog li plaub tus neeg siv tuaj yeem txhawb nqa kev sib txuas MU-MIMO.Ntxiv mus, vim kev siv OFDM thev naus laus zis rau kev sib kis, thaum muaj kev thov bandwidth loj ntawm cov neeg siv txuas nrog, nws yuav ua rau muaj kev kub ntxhov rau tag nrho cov wireless network, vim tias qhov kev thov siab ntawm ib tus neeg siv tsis tsuas yog tuav lub bandwidth. , tab sis kuj zoo heev occupies cov lus teb ib txwm nkag mus rau lub network xav tau kev pab ntawm lwm cov neeg siv, vim hais tias cov channel ntawm tag nrho cov nkag point yuav teb rau qhov kev thov, uas ua rau lub phenomenon ntawm "kev sib txuas lus cuav".Piv txwv li, nyob rau hauv tsev, yog hais tias ib tug neeg downloads thunder, ces kev ua si hauv internet yuav pom tseeb tias qhov nce nyob rau hauv latency, txawm yog hais tias tus download ceev tsis mus txog rau sab sauv txwv ntawm broadband nkag mus rau hauv tsev, uas yog mus rau ib tug loj npaum li cas.

Txheej txheem cej luam ntawm lub xeev tam sim no ntawm technology nyob rau hauv WIFI 6

Txij li thaum nws invention, nws daim ntawv thov tus nqi thiab kev lag luam tus nqi tau dav lees paub los ntawm kev lag luam, thiab nws tau raug siv nyob rau hauv yuav luag tag nrho cov mobile pab kiag li lawm thiab feem ntau nyob rau hauv ib puag ncig.Raws li tib neeg txoj kev ua neej nyob txuas ntxiv txhim kho, W i F i thev naus laus zis tau hloov kho tas li los muab cov neeg siv kev paub txog kev siv wireless zoo dua.2 0 1 9 xyoo, tsev neeg W i F i txais tos cov tswv cuab tshiab, W i F i 6 thev naus laus zis tau yug los.

Technical nta ntawm WIFI

1.1 Orthogonal Frequency Division Multiple Access

W i F i 6 siv orthogonal zaus division multiple access (OFDMA) channel access technology, uas faib cov wireless channel mus rau ib tug loj tus naj npawb ntawm sub-channels, thiab cov ntaub ntawv nqa los ntawm txhua subchannel sib haum mus rau sib txawv nkag mus rau hauv cov ntaub ntawv, yog li ua tau zoo cov ntaub ntawv. tus nqi.Thaum siv cov khoom sib txuas ib leeg, qhov theoretical siab tshaj plaws ntawm W i F i 6 yog 9.6 G ntsis / s, uas yog 4 0% siab dua W i F i 5. (W i F i 5 theoretical siab tshaj tus nqi ntawm 6.9 Gbit / s).Nws qhov txiaj ntsig zoo dua yog tias qhov theoretical ncov tus nqi tuaj yeem muab faib ua txhua yam khoom siv hauv lub network, yog li nce tus nqi nkag ntawm txhua lub cuab yeej hauv lub network.

1.2 Multi-user multi-input multi-output technology

W i F i 6 kuj suav nrog Multi-User Multiple Input Multiple Output (MU – MIMO) technology.Cov thev naus laus zis no ua rau cov khoom siv los teb ib txhij rau cov ntsiab lus nkag wireless uas muaj ntau lub kav hlau txais xov, tso cai rau cov ntsiab lus nkag mus sib txuas lus tam sim nrog ntau yam khoom siv.Hauv W i F i 5, cov ntsiab lus nkag tuaj yeem txuas nrog ntau yam khoom siv tib lub sijhawm, tab sis cov khoom siv no tsis tuaj yeem teb tib lub sijhawm. 

1.3 Lub hom phiaj tsim lub sijhawm siv tshuab

Lub hom phiaj tsim lub sij hawm (TWT, TARGETWAKETIME) TECHNOLOGY yog ib qho tseem ceeb RESOURCE Teem caij TECHNOLOGY ntawm W i F i 6, lub tshuab no tso cai rau cov cuab yeej sib tham txog lub sij hawm thiab lub sij hawm ntawm waking li xa los yog tau txais cov ntaub ntawv, thiab lub wireless access point tuaj yeem pab pawg. cov neeg siv khoom siv rau hauv ntau lub voj voog TWT, yog li txo tus naj npawb ntawm cov khoom sib tw rau cov channel wireless tib lub sijhawm tom qab sawv.TWT thev naus laus zis kuj tseem ua rau lub sijhawm pw tsaug zog ntawm lub cuab yeej, uas txhim kho lub roj teeb lub neej thiab txo lub zog siv ntawm lub davhlau ya nyob twg.Raws li kev txheeb cais, kev siv TWT thev naus laus zis tuaj yeem txuag tau ntau dua 30% ntawm lub davhlau ya nyob twg siv hluav taws xob, thiab nws yog qhov tsim nyog rau W i F i 6 thev naus laus zis kom ua tau raws li qhov xav tau ntawm lub zog siv hluav taws xob tsawg ntawm IoT terminals yav tom ntej. 

1.4 Cov kev pab cuam txheej txheej xim txheej txheem

Txhawm rau txhim kho cov kev ua tau zoo tag nrho ntawm cov kab ke hauv cov khoom siv ntom ntom ntom ntom, thiab daws cov teeb meem ntawm kev cuam tshuam ntawm kev sib cuam tshuam ntawm kev cuam tshuam rau kev cuam tshuam rau kev sib cav sib ceg. W i tiam dhau los ntawm kev siv tshuab, uas yog cov kev pabcuam yooj yim teeb xim (BSSSC ooooring) mechanism.Los ntawm kev ntxiv BSSC oooring teb nyob rau hauv header rau "stain" cov ntaub ntawv los ntawm ntau yam kev pab cuam sets (BS S), lub mechanism muab ib tug xim rau txhua channel, thiab cov receiver tuaj yeem txheeb xyuas cov co-channel cuam tshuam teeb liab thaum ntxov raws li BSSSCOOORING FIELD OF LUB PACKET HEADER THIAB NTAUB NTAWV THOV NTAU NTAU NTAU NTAU NTAU NTAU NTAU NTAU, AVOIDING WASTING TRANSMISION THIAB tau txais lub sijhawm.Raws li cov txheej txheem no, yog tias cov headers tau txais yog cov xim tib yam, nws raug suav tias yog ib qho kev cuam tshuam cov teeb liab nyob rau hauv tib 'BSS, thiab kev sib kis yuav raug ncua;Hloov pauv, nws tau txiav txim siab tias tsis muaj kev cuam tshuam ntawm ob, thiab ob lub teeb liab tuaj yeem xa mus rau tib lub channel thiab zaus.

2 Cov ntawv thov xwm txheej ntawm WiFi 6 thev naus laus zis 

2.1 Loj broadband video service bearer

Nrog rau kev txhim kho txuas ntxiv ntawm tib neeg cov kev xav tau rau kev ua yeeb yaj kiab, qhov bitrate ntawm ntau yam kev pabcuam video kuj nce ntxiv, los ntawm SD mus rau HD, los ntawm 4K txog 8K, thiab thaum kawg mus rau VR video tam sim no.Txawm li cas los xij, nrog rau qhov no, cov kev xav tau ntawm kev xa xov bandwidth tau nce, thiab ua tau raws li cov kev xav tau ntawm ultra-wideband video kis tau tus mob tau dhau los ua qhov nyuaj rau kev pabcuam video.Lub 2.4GH z thiab 5G H z bands sib koom ua ke, thiab 5G H z band txhawb 160M H z bandwidth ntawm tus nqi mus txog 9.6 G ntsis / s.5G H z band muaj qhov cuam tshuam tsawg dua thiab tsim nyog rau kev xa cov kev pabcuam video. 

2.2 Cov kev pabcuam qis qis xws li kev ua si hauv online

Cov kev pabcuam kev ua si hauv online yog cov kev pabcuam sib cuam tshuam thiab muaj kev xav tau siab dua rau bandwidth thiab latency.Tshwj xeeb tshaj yog rau cov kev ua si VR tshwm sim, txoj hauv kev zoo tshaj plaws los nkag rau lawv yog W i F i wireless.OFDMA channel slicing thev naus laus zis ntawm W i F i 6 tuaj yeem muab cov channel tshwj xeeb rau kev ua si, txo qis latency, thiab ua tau raws li cov kev xav tau ntawm cov kev pabcuam kev ua si, tshwj xeeb tshaj yog cov kev pabcuam VR game, kom tsis tshua muaj kev sib kis tau zoo. 

2.3 Lub tsev ntse ntse sib txuas

Kev sib txuas lus ntse yog ib feem tseem ceeb ntawm kev lag luam hauv tsev ntse xws li lub tsev ntse thiab kev ruaj ntseg ntse.Cov cuab yeej sib txuas hauv tsev tam sim no muaj kev txwv sib txawv, thiab W i F i 6 thev naus laus zis yuav coj cov hauv kev rau kev sib koom ua ke rau kev sib txuas hauv tsev ntse.Nws optimizes kev sib koom ua ke ntawm qhov siab ceev, ntau qhov kev nkag tau, kev siv hluav taws xob tsawg thiab lwm yam ntxwv, thiab tib lub sijhawm tuaj yeem sib xws nrog ntau yam mobile terminals feem ntau siv los ntawm cov neeg siv, muab kev sib cuam tshuam zoo. 

Raws li ib qho kev tawm tshiab wireless LAN thev naus laus zis nyob rau xyoo tas los no, WiFi6 thev naus laus zis tau nyiam los ntawm tib neeg rau nws txoj kev kub ceev, bandwidth loj, qis latency thiab qis zog noj, thiab tuaj yeem siv dav hauv video, games, ntse hauv tsev thiab lwm yam kev lag luam, muab ntau dua. yooj yim rau tib neeg lub neej.