Txij li Iptv nkag mus rau tom khw hauv xyoo 1999, tus nqi loj hlob tau maj mam ua kom tiav. Nws yuav tsum tau hais tias lub ntiaj teb IPTV cov neeg siv yuav ncav cuag ntau dua 26 lab los ntawm IPTV cov neeg siv hauv Suav los ntawm 2003 txog 2008 yuav ncav cuag 245%.
Raws li kev sojntsuam, lub xeem KilometerIPTVKev nkag mus yog siv tau nyob rau hauv DSL Cable Kev Siv Hom, los ntawm kev sib tw nrog kev tsim kho ntawm tus nqi yog qhov siab, lub voj voog yog ntev, thiab nyuaj. Yog li ntawd, yuav ua li cas los daws cov teeb meem kawg mais ntawm IPTV yog qhov tseem ceeb tshwj xeeb.
Wimax (Cov neeg ntiaj teb-ntiaj teb-muaj peev xwm nkag tau rau hauv lub tshuab loj heev Nws tuaj yeem hloov cov ntaub ntawv DSL uas twb muaj lawm thiab cov wired sib txuas los muab cov ntawv ruaj, txawb ntawm wireless broadband sib txuas. Vim nws tus nqi tsim kho qis, kev ua tau zoo siab thiab kev ntseeg siab, nws yuav yog qhov kev siv thev naus laus zis kawg ntawm IPTV.
2, qhov teeb meem tam sim no ntawm IPTV nkag thev naus laus zis
Tam sim no, cov kev siv tau siv tau cov thev naus laus zis los muab IPTV cov kev pabcuam suav nrog cov kev pabcuam IPTV suav nrog High-ceev DSL, FTTH thiab lwm yam Wireline Access Access Access Access Access. Vim tias qhov kev nqis peev tsawg hauv kev siv DSL cov kev pab cuam tam sim no los txhawb nqa cov thawv hauv tebchaws DSL rau hauv TV teeb tsa los muab IPTV cov kev pabcuam.
Cov ntsiab lus tseem ceeb tshaj plaws ntawm IPTV tus tuav xws li VOD thiab TV programs. Txhawm rau kom ntseeg tau tias qhov zoo tshaj ntawm IPTV yog piv rau qhov uas ntawm cov kev siv cable DSL tam sim no, thiab cov kev pab txhawb nqa ntawm DSL, thiab cov ntaub ntawv DSL tsis muaj tsawg. Ipv4 raws tu qauv cov kev faib, tsis txhob txhawb multicast. Txawm hais tias theoretically muaj tseem nyob rau kev txhim kho DSL thev naus laus zis, muaj ob peb qhov kev ua tau zoo pauv hauv bandwidth.
3, Cov yam ntxwv ntawm Wimax Tshuab
Wimax yog qhov dav dav siv tshuab hluav taws xob raws IEEES802.16 tus qauv, uas yog cov cua tshiab interface tus qauv npaj rau microwave thiab mannimeter koj yoj. Nws tuaj yeem muab tus nqi xa mus rau 75Mbit / S Kis tus nqi, ib puag ncig chaw nres tsheb them nyiaj them rau 50km. Wimax yog tsim rau Wireless LANG thiab daws cov teeb meem ntawm cov kab ib puag ncig ntawm cov kab txuas ntxiv, nws tuaj yeem siv txoj kab caj qaum, thiab tuaj yeem siv ua kab hlau, thiab tuaj yeem siv raws li cov kab ntawv dth. Nws kuj tseem tuaj yeem siv los txuas ib puag ncig xws li kev lag luam lossis tsev mus rau lub ntsej muag wireless, thiab siv tau los ua hluav taws xob thiab DSL kom pab tau wireless broadband nkag.
4, Wimax paub tias wireless nkag tau ntawm IPTV
(1) yuav tsum tau ntawm IPTV ntawm kev nkag mus rau network
Lub ntsiab tseem ceeb ntawm IPTV kev pabcuam yog nws sib cuam tshuam thiab lub sijhawm tiag tiag. Los ntawm IPTV cov kev pabcuam, cov neeg siv tuaj yeem txaus siab rau cov kev pabcuam DVD) digital me nyuam tus lej, thiab tuaj yeem tiv thaiv tus IP broadand
Txhawm rau kom ntseeg tau tias qhov kev pom zoo ntawm IPTV yog piv rau qhov ntawd network, IPTV nkag mus rau hauv cov nqe lus ntawm bandwidth, channel hloov lub latency, networkeve mus rau ntawm lub latency, networkeve. Network QOS, thiab lwm yam. Nyob rau hauv cov nqe lus ntawm cov neeg siv khoom siv nkag mus siv tau dav dav siv cov tshuab uas twb muaj lawm, yog tias kis tau tus mob hauv cov yeeb yaj kiab ntau dua, qhov uas yuav tsum tau ua yog siab dua; Nyob rau hauv cov channel hloov qeeb, txhawm rau kom ntseeg tau tias Iptv cov neeg siv tau yuav tsum muaj tsawg kawg ntawm IPTV cov khoom siv (DSPLY thev naus laus zis (DSPLAM) los txhawb nqa IP multicast technology; Hais txog Network QOS, kom tiv thaiv pob ntawv poob, jitter thiab lwm yam cuam tshuam rau qhov zoo ntawm IPTV saib.
(2) kev sib piv ntawm Wimax nkag mus nrog DSL, WI-FI thiab FTTX nkag hauv
DSL, vim nws cov kev txwv kev ua haujlwm, tseem muaj ntau yam teeb meem ntawm kev ncua deb, tus nqi thiab tus lej. Piv nrog DSL, Wimax tuaj yeem npog ib qho chaw loj dua, muaj cov ntaub ntawv tshwj xeeb, muaj ntau dua cov neeg tuaj yeem lav.
Piv nrog Wi-nkaus, Wimax muaj cov txiaj ntsig zoo ntawm cov kev pab cuam tshuam txog kev sib koom ua ke, thiab lwm yam Wi-Fi-Fi-entices Internet, thiab lwm yam. Wimax yog raws li cov wireless wirelessAs yog raws li Wireless Metropolitan cheeb tsam network (wman
FTB + LAN, raws li lub siab-nrawm broadband nkag mus, nqa tawmIPTVKev pabcuam yam tsis muaj teeb meem thev naus laus zis ntau, tab sis nws yog qhov teeb meem ntawm kev sib xyaw ua ke hauv lub tsev, raug nqi thiab kev sib kis tau tshwm sim los ntawm twisted-khub cable. Wimax lub zoo tshaj plaws tsis-kab-pom kev sib kis cov yam ntxwv thiab muaj zog kev ruaj ntseg txhua qhov ua rau nws muaj kev nkag mus zoo tshaj plaws rau IPTV.
(3) Qhov zoo ntawm wimax nyob rau hauv kev paub txog wireless nkag mus rau IPTV
Los ntawm kev sib piv wimax nrog DSL, Wi-nkaus thiab FTTX, nws tuaj yeem pom tau tias Wimax tau xaiv tau zoo dua IPTV nkag tau. Txog lub Tsib Hlis 2006, tus naj npawb ntawm Wimax Cov Neeg Hais Lus Cov Tswv Yim loj hlob mus rau 356, thiab ntau dua 120 tus ua haujlwm thoob plaws ntiaj teb tau koom nrog lub koom haum. Wimax yuav yog cov thev naus laus zis zoo tshaj plaws los daws cov mais kawg ntawm IPTV. Wimax kuj tseem yuav yog qhov zoo dua rau DSL thiab Wi-nkaus.
(4) Wimax paub txog IPTV nkag
IeeeSh02.16-2004 tus qauv tsuas yog taw qhia cov terminals, kev sib txuas lus ntau dua yog 7 ~ 10kh, thiab nws txoj kev sib txuas lus ntawm txhua channel yog nruab nrab ntawm 1.25 ~ 20mHz. Thaum lub bandwidth yog 20 MHz, tus nqi siab tshaj plaws ntawm IEEE 802.16A tuaj yeem ncav cuag 75 mitt / s, feem ntau yog 40 MBB / S; Thaum lub bandwidth yog 10 MHz, nws tuaj yeem muab qhov sib kis tau nruab nrab ntawm 20 lub mitt / s.
Wimax Networks Txhawb Cov Qauv Ua Lag Luam Ua Lag Luam. Cov kev pab cov ntaub ntawv ntawm cov nqi sib txawv yog lub hom phiaj tseem ceeb ntawm lub network.wimax txhawb nqa ntau qib, yog li cov kev pab cuam network yog ze rau hom kev pabcuam. Nyob rau hauv cov nqe lus ntawm IPTV nkag. Vim tias IPTV yuav tsum tau qib qos paub tseeb thiab cov ntaub ntawv ceev tau kis tus nqi. Yog li lub wimax network tau teeb tsa tsim nyog raws li tus naj npawb ntawm cov neeg siv nyob rau thaj chaw thiab lawv cov kev xav tau. Thaum cov neeg siv nkag mus rau IPTV network. Tsis tas yuav nqa cov hluav taws xob tawm dua, tsuas yog xav tau Wimax ntxiv, yog li cov neeg siv tau siv IPTV Service yooj yim thiab sai.
Ntawm tam sim no, IPTV yog qhov kev ua lag luam tawm nrog cov peev xwm ua lag luam zoo, thiab nws txoj kev loj hlob tseem nyob hauv nws tus menyuam mos. Cov qauv ntawm nws txoj kev txhim kho yav tom ntej yog txhawm rau txuas ntxiv rau IPTV cov kev pabcuam nrog cov chaw siv IPTV nrog cov chav kawm thiab TV yuav dhau los ua kev sib txuas lus hauv tsev nrog kev sib txuas lus thiab Is Taws Nem ua haujlwm. Tab sis IPTV kom ua tiav qhov kev sib tawg hauv qhov tseeb, tsis yog daws cov teeb meem ntsiab lus, tab sis kuj yuav daws cov peev txheej ntawm lub sijhawm dhau los.
Lub Sijhawm Post: Dec-05-2024