EoC (EthernetoverCOAX Ethernet cov ntaub ntawv xa tawm los ntawm coaxial cable)
kev txuj ci
Ntau cov thev naus laus zis thiab cov kev daws teeb meem tau tshwm sim tam sim no, thiab lub teeb liab Ethernet kis tau los ntawm cov coaxial cable tom qab ua cov txheej txheem xws li kev hloov kho thiab demodulation. Txawm hais tias qee tus neeg tseem hu nws" EthernetoverCoax" ;, nws txawv heev ntawm EoC tiag tiag (hauv paus EoC / passive EoC). Lub teeb liab kis ntawm cov coaxial cable tsis tswj tus ncej hom ntawm Ethernet teeb liab. Nws yog nruj me ntsis kev ntawm kev xav, nws tsis tuaj yeem hu" EoC" ;. Muaj feem ntau yog cov hauv qab no ntawm cov thev naus laus zis: HomePNAoverCoax, HomePlugBPLoverCoax, HomePlugAVoverCoax, WiFioverCoax, MoCA-MultimediaoverCoaxAlliance, peb yuav suav hu nws" nquag EoC" lossis" modulated EoC" rau lub sijhawm ua.
HomePNA, HomePlugBPL, HomePlugAV thiab WiFi (WirelessLAN, WirelessFidelity) yog tam sim no cov kev siv technology hauv tsev tau zoo. Lawv txoj kev loj hlob muaj keeb kwm ntawm ntau xyoo. MoCA yog coaxial cable-based networking technology launched los ntawm MultimediaoverCoaxAlliance. Nws yog ib qho ntawm plaub thev naus laus zis. Tus yau tshaj. HiNOC yog tus qauv EOC thev naus laus zis uas nyuam qhuav tshwm sim hauv Suav lag luam, thiab nws tseem yog thev naus laus zis tshwj xeeb rau cov coaxial cables, tab sis tam sim no tsis muaj nti ua lag luam nti.
Folding MOCA
MoCA yog qhov luv ntawm Multimedia tshaj Coax Alliance (Multimediaover Coax Alliance), MoCA tau tsim nyob rau Lub Ib Hlis 2004, cov neeg tsim yog Cisco, Comcast, EchoStar, Entropic, Motorola thiab Toshiba. MoCA vam tias yuav muab txoj hauv kev xa cov ntaub ntawv tshaj tawm video nrog coax (Coax); lawv siv Entropic' s thev naus laus zis (c-txuas) ua lub hauv paus rau MoCA1.0 kev paub meej. MoCA cov tswvcuab ntseeg tias kev nkag mus ntawm cov xov kab coaxial hauv tsev neeg Asmeskas tau txog 70%, thiab tag nrho cov vaj tsev ua tiav. Ntxiv rau, thev naus laus zis ntawm coaxial cable kis ntawm multimedia video ntaub ntawv yog qhov paub tab heev thiab ruaj khov, thiab nws tsim nyog siv nws los xa cov ntaub ntawv video multimedia. MoCA cov khoom lag luam tuaj yeem siv cov xov tooj cable coaxial uas twb muaj lawm, ua ke nrog kev sib txuas lus kho qhov muag, kom siv nws los muab txoj kev loj dav dav siv cov tsev thiab cov zej zog.
Folding cia zaus WiFi
Wireless hauv cheeb tsam thaj chaw siv tshuab yog ib qho txuj ci tshiab nyob rau hauv kev xa xov hluav taws xob. Nyob rau tam sim no, WLAN thev naus laus zis tau dhau los ntawm ib hnub thiab nws cov ntawv thov tau dhau los ua qhov dav dua. Ntawm cov qauv ntau, feem ntau cov paub zoo tshaj plaws yog IEEE (Lub Koom Haum Asmeskas ntawm Hluav Taws Xob thiab Hluav Taws Xob Hluav Taws Xob) 802.11 series. Ib qho ntxiv, cov koom haum uas tsim WLAN cov qauv suav nrog ETSI (European Telecommunications Standardization Organization) thiab HomeRF pawg neeg ua haujlwm. Cov qauv uas tau npaj tseg los ntawm ETSI yog HiperLan thiab HiperLan2. , Ob qhov qauv ntawm HomeRF pab pawg ua haujlwm yog HomeRF thiab HomeRF2. Ntawm cov qauv tsim los ntawm peb lub koomhaum no, IEEE 802.11 tus qauv txheem tau ib txwm tau txais kev txhawb nqa ntau tshaj plaws hauv kev lag luam vim nws Ethernet txuj 802.3' s cawv hauv kev lag luam, tshwj xeeb hauv kev pabcuam cov ntaub ntawv. Cov tuam txhab sib txawv siv WiFioverCoax hauv txoj kev sib txawv me ntsis. Qhov loj tshaj qhov sib txawv nyob ntawm qhov sib txawv ntawm txoj siv tau siv thiab seb nws puas hloov dua.
MoCA txoj kev txhim kho txoj kev
MoCA1.0 tau tso tawm xyoo 2007
Muaj ntau zaus band: 850-1500Mhz.
Qeb ntawm lub cev txheej txheem: 270Mbps
MAC txheej tus nqi: 130Mbps
Tus naj npawb ntawm cov neeg siv: 63.
· Thaum 97% thauj, MAC tus nqi nce mus txog 110Mpbs.
Raug sij hawm ncua: 3ms
Band dav: 50Mhz
· MoCA1.1 tau tawm hauv xyoo 2008
Muaj ntau zaus band: 500-1650Mhz.
Tus naj npawb ntawm cov neeg siv: 63.
· Thaum 97% thauj, MAC tus nqi nce mus txog 160Mpbs.
Raug sij hawm ncua: 3ms
Band dav: 50Mhz
Rate MAC txheej tus nqi: 175Mbps (siv pob ntawv kev sib sau, pob ntawv)
· QoS
· Xub QoS
Parameterized QoS (PQoS)-kev xaib xov xwm
Cov khoom lag luam tau raug tsim tawm hauv Suav teb, xws li Beijing Jinqiao Hengtai Technology, Chengdu Feiguang Kev Sib Txuas Lus, Chengdu Hitop Electronics, thiab lwm yam.
· MoCA2.0 tau tshaj tawm xyoo 2010
Muaj ntau zaus band: 500-1650Mhz.
Tus naj npawb ntawm cov neeg siv: 63.
Raug sij hawm ncua: 3ms
· QoS
· Xub QoS
Parameterized QoS (PQoS)-kev xaib xov xwm
MAC txheej tus nqi: 400Mbps, 800Mbps (bandwidth yog 100MHz)
Tus nqi ntawm lub cev qib: 700Mbps, 1400Mbps (bandwidth yog dual 100MHz)
Ward Cov rov qab sib txuam tsis cuam tshuam nrog kev ua tau zoo
Ob hom kev siv hluav taws xob tsawg
Txhim kho PER kev ua tau zoo
· 400Mbps twb muaj lawm
HomePlugAV
Thaum Lub Peb Hlis 2000, ntau lub tuam txhab suav nrog Cisco, HP, Motorola thiab Intel ua ke tsim cov lag luam HomePlugPowerlineAlliance. Lub tswv yim los teeb tsa thaj chaw hauv cheeb tsam nrog cov xov tooj hluav taws xob thaum kawg tau muaj tus qauv zoo ib yam thiab cov kev kawm nce qib. Home Powerline Network Alliance tom qab ntawd tau luam tawm thawj cov qauv rau kev siv hluav taws xob ua ke-HomePlug1.0 nyob rau lub Rau Hli 2001. Kev ua haujlwm ntawm HomePlugAV pib ua haujlwm thaum Lub Ob Hlis 2003. Lub Yim Hli 2005, Home Powerline Network Alliance tau pom zoo tus qauv tshiab ntawm HomePlugAV. Lub hom phiaj ntawm HomePlugAV yog tsim kom muaj cov kev sib txuas lus zoo, muaj ntau cov chaw xa xov xwm, ua kev lom zem rau cov xov hluav taws xob nyob hauv tsev, tshwj xeeb kom tau raws li qhov xav tau ntawm lub tsev xov tooj digital multimedia kis. Nws siv cov txheej txheem lub cev siab thiab MAC txheej thev naus laus zis los muab 200Mbps fais fab kab hluav taws xob network rau kis ntawm video, audio thiab cov ntaub ntawv. Lub cev txheej txheem ntawm HomePlugAV siv OFDM hom kev hloov kho, uas hloov cov ntaub ntawv cov cim kom raug xa los ntawm kev hloov pauv mus rau qhov loj me kom txo tus nqi, thiaj li ua rau lub sijhawm cim los ua kom lub zog cuam tshuam ntawm kev cuam tshuam ntau yam. Nyob rau tib lub sijhawm, nws siv cyclic cov cim ua ntej (CP) raws li tus saib xyuas lub sijhawm, uas zoo heev txo lossis txawm tias tshem tawm cov cim kev cuam tshuam, thiab ua kom orthogonality ntawm cov channel, yog li txo cov kev cuam tshuam ntawm channel. Ntawm chav kawm, qhov no tseem them tus nqi ntawm bandwidth thiab coj lub zog poob: lub CP ntev dua, qhov ntau lub zog poob. Hauv OFDM, qhov ntau zaus ntawm txhua qhov subcarrier muaj 1/2 sib tshooj thiab orthogonality, uas txhim kho cov kev siv spectrum ntawm OFDM tes taws los piav txoj kev. Ntawm qhov tau txais kawg, txhua tus cab kuj tau sib cais los ntawm cov thev naus laus zis sib txawv, thiab tib lub sijhawm, kev cuam tshuam ntawm kev cuam tshuam ntawm lub cim cuam tshuam raug tshem tawm. Tom qab tshem tawm qhov zaus ntawm kev cuam tshuam tsawg zaus, EOC cov khoom lag luam raws li HomePlugAV siv 917 cov tsheb thauj khoom hauv 7-30MHz zaus cov xaib; lub zog hluav taws xob spectral yog programmable kom tau raws li cov kev cai zaus ntawm cov teb chaws sib txawv; txhua tus xa tawm tuaj yeem yog tus kheej BPSK, QPSK, 8QAM, 16QAM, 64QAM, 256QAM thiab 1024QAM kev hloov kho; TurboFEC kev ua yuam kev kuaj xyuas saws; lub cev txheej kab tus nqi tau nce mus txog 200Mbps, qhov them nyiaj yog 150Mbps, thiab lub thaiv kev tuaj yeem tuaj yeem kuaj pom los ntawm HomePlug1.0 ntaus ntawv kom paub txog kev sib koom ua ke ntawm ob, tab sis kev sib cuam tshuam yog kev xaiv.
Tam sim no Homeplug tshaj tawm tias nws txhawb IEEEP1901 thiab yuav tsis tsim tshwj xeeb lawm.
EMoC
EMoC yog qhov luv ntawm EPONMACoverCable. Nws txais yuav EPONMac txheej qauv txheej txheem, thev naus laus zis ntawm G.hnG.9660 lub cev txheej txheem txheej txheej rau cov ntaub ntawv xa mus rau Broadcasting thiab TV Cable Network. Nws yog lub nti ntawm Chengdu Shuangxin Electronics. Nws yog sib haum nrog Deco.
Kev siv txheej txheej ntawm lub cev ntawm G.hn, qhov kis tau tus mob tuaj yeem ncav cuag 1.8Gbps. MAC txheej txais yuav MAC txheej ntawm EPON, thiab qhov kis tau tus mob siab tshaj plaws tuaj yeem ncav cuag 900Mbps.
ECAN
ECAN yog cov tsiaj ntawv luv ntawm EthernetCoaxAccessNetwork, uas yog thev naus laus zis rau cov ntaub ntawv xa xov ntawm Broadcasting thiab TV Cable Network tsim tom qab EPON thev naus laus zis. Nws yog lub nti ntawm Puran.
Tsim
Deco (DatatransmissionwithEPONMACandCodedOFDM), txais EPONMac txheej raws tu qauv, G.hnG.9660 lub cev txheej txheem txheej txheem, thev naus laus zis rau cov ntaub ntawv xa xov tooj cua thiab xov tooj cua cable network. Nws yog ib hom ntawm nti ntawm Shanghai Jingle. Nws tau tshaj EMoC.
IEEEP1901
Lub Xya hli ntuj xyoo 2005, lub koom haum ntawm Hluav Taws Xob thiab Hluav Taws Xob Cov Hluav Taws Xob IEEE tau tsim P1901 pawg neeg ua haujlwm kom sib koom ua ke cov txheej txheem cov tswv yim rau cov xaim hluav taws xob broadband kev sib txuas lus. Cov ntsiab lus hais txog kev sib txuas sab hauv tsev thiab sab nrauv sab nrauv kom nkag tau ntawm hluav taws xob kab dav dav kev sib txuas lus, nrog rau kev sib cuam tshuam ntawm ob ntu. Thaum Lub Kaum Ob Hlis 2008, IEEEP1901 tau dhau qhov kev thov txheem txheej txheem rau txheej nruab nrog cev (PHY) thiab kev nkag nruab nrab txheej txheej (MAC) ntawm cov xaim hluav taws xob kab dav dav sib txuas lus. Cov tswv yim pom muaj peb txoj kev xaiv, raws li HomePlug Powerline Alliance' s HomePlugAV technology, Panasonic' s HDPLC thev naus laus zis thiab ITU-TG.hn' Thaum Lub Ob Hlis 2010, IEEE tau ua tiav daim qauv thawj zaug thiab tso nws, txhais txog HomePlug Powerline Alliance's HomePlugAV thev naus laus zis thiab Panasonic's HDPLC thev naus li kev xaiv cov qauv rau lub cev txheej, muab kev rau siab ua haujlwm kom haum rau G.hn. Jiangsu Cable tau txhais P1901 tus qauv raws li EOC tus qauv ntawm Jiangsu Xov Tooj Cua thiab TV hauv" Jiangsu Cable EOC Cov Lus Qhia Tshwj Xeeb" tawm thaum ntxov xyoo 2010.
Passive EoC
Tshuab passive EoC (EthernetoverCoax) yog ua raws cov kab ke twg uas muaj feem rau IEEE802.3, uas yog lub thev naus laus zis xa khoom Ethernet teeb liab ntawm coaxial cables. Lub thav duab hom thiab MAC txheej ntawm cov thawj Ethernet teeb liab tsis tau hloov pauv, tshwj tsis yog tias lub teeb liab sib txawv tsis sib haum (xov tooj sib xyaw nruab nrab) yuav hloov mus ua lub teeb liab tsis sib npaug (coaxial cable nruab nrab). Nws qhov loj tshaj plaws yog tias tus neeg siv khoom yog lub ntsuas phoo. Qhov theem pib kis tau tus mob sib kis tau los ntawm 0-65MHz ntau zaus cov qhab los muab cov neeg siv nrog bandwidth ntawm 10M. Siv cov txheej txheem siab thiab qis dhau kev lim dej, txhua yam khoom siv dhau los siv kom paub cov kis ntawm cov ntaub ntawv thiab xov tooj cable TV teeb liab ntawm cov coaxial. Lub kaw lus yuav tsum hloov cov qub sib kis ntawm Ethernet teeb liab mus rau qhov tsis sib xws kis tau, thiab tseem yuav kis thiab txais Ethernet. Cov teeb liab hluav taws xob ua ib qho teeb liab, thiab ua tiav 100 ohm / 75 ohm impedance kev hloov pauv. Lub tshuab siv xov tooj cua tshuab Eband yog qhov thev naus laus zis uas siv ntau zaus sib faib ntau yam rau cov cuab yeej Ethernet teeb liab IPDATA thiab xov tooj cua TV teeb liab TVRF, kom ob lub teeb liab kis tau ua ke hauv tib coaxial cable. Raws li kuv lub teb chaws tus qauv rau kev faib cov zaus ntawm cable TV network hauv lub teb chaws tus qauv qub, IPDATA cov teeb liab kis tau rau hauv cov zaus zaus qis dua 35MHz, thiab TVRF cov teeb liab kis tau rau hauv zaus zaus saum 48MHz, uas tuaj yeem paub qhov sib xws cable kis ntawm ob lub teeb liab yam tsis cuam tshuam rau ib leeg, lossis raws li lub teb chaws tus qauv tshiab tshiab 65/87 cais taw tes, EOC cov kab lim nrog yooj yim rau cov khoom lag luam loj. Hauv tsev, cov xaim coaxial ntawm HFC network tau siv ncaj qha mus xa cov teeb liab sib xyaw ntawm IPDATA thiab TVRF rau tus neeg siv kawg, thiab tom qab ntawd qhov kev sib cais siab ntawm cov teeb liab sib xyaw tau pom tseeb ntawm tus neeg siv kawg. Passive EOC xav tau los ua ke Ethernet teeb liab thiab CATV teeb liab saum toj ntawm 86 MHz dhau los ntawm cov lim roj lim. Lub lim roj duplex yuav tsum muaj qhov kev rho tawm zoo, poob siab rov qab, thiab qis qis tsis tuaj yeem ua rau muaj kev cuam tshuam zoo rau Ethernet. Pib ntsais koj teeb generated. Nyob rau tib lub sijhawm, lub lim yuav tsim cov theem tsis txuas ntxiv, thiab qhov tsim nyog kom sib npaug ntawm cov pab pawg ncua yuav tsum muaj. Yog li, cov cim taw qhia thiab cov txheej txheem cov khoom lag luam yuav tsum muaj siab heev, txwv tsis pub nws yooj yim ua rau lub teeb liab raug thaiv. Vim tias lub zog ntawm passive EOC feem ntau yog ua tiav nyob rau hauv 0-20MHz, thiab cov kab xev ntawm cov ceg faib khoom feem ntau yog 5 txog 1000MHz, yog li ntawd qhov passive EOC tsis tuaj yeem dhau los ntawm cov ceg faib khoom.