Njengoba i-IPTV yangena emakethe ngo-1999, izinga lokukhula lishelelezi kancane kancane. Kulindeleke ukuthi abasebenzisi be-IPTV bomhlaba wonke bazofinyelela ngaphezu kwezigidi ezingama-26 ngonyaka we-2008, kanye nezinga lokukhula konyaka labasebenzisi be-IPTV eChina kusuka ngo-2003 kuya ku-2008 bazofika ngo-245%.
Ngokwenhlolovo, ikhilomitha lokugcina leI-IPTVUkufinyelela kuvame ukusetshenziswa kwimodi yokufinyelela ikhebula ye-DSL, nge-bandwidth kanye nokuqina kanye nezinye izinto, i-IPTV emncintiswaneni nge-TV ejwayelekile isenkingeni, futhi imodi yokufinyelela ikhebula yokwakhiwa kwezindleko iphezulu, umjikelezo mude, futhi unzima. Ngakho-ke, ungaxazulula kanjani inkinga yokufinyelela ye-IPTV yokugcina ye-IPTV ibaluleke kakhulu.
I-WIMax (WorldwideinterIcter-PowerformRiCRAVE AFFECTIVE) ubuchwepheshe bokufinyelela ngaphandle kwentambo bususelwa ku-IEEE802.16 uchungechunge lwezinqubomgomo ezilandelwayo, eziye zaba yindawo entsha yentuthuko ye-hotspot ye-Metro Broadband Technology. Ingangena esikhundleni se-DSL ekhona kanye nokuxhumeka kwentambo ukuhlinzeka ngezindlela ezilungisiwe, zeselula zokuxhumeka kwe-wireless Broadband. Ngenxa yezindleko zayo zokwakha eziphansi, ukusebenza okuphezulu kwezobuchwepheshe kanye nokwethenjwa okuphezulu, kuzoba ubuchwepheshe obungcono ukuxazulula inkinga yokugcina ye-IPTV yokugcina ye-IPTV.
2, isimo samanje sobuchwepheshe be-IPTV Ukufinyelela
Njengamanje, ubuchwepheshe bokufinyelela obuvame ukusetshenziswa ukuhlinzeka ngezinsizakalo ze-IPTV bufaka i-DSL ephezulu ye-IPTV, i-FTB, FTTH kanye nezinye ubuchwepheshe bokufinyelela kwe-wireline. Ngenxa yokutshalwa kwezimali okuphansi ekusebenziseni uhlelo lwe-DSL olukhona ukusekela izinsizakalo ze-IPTV, ama-3/4 opharetha we-telecom e-Asia basebenzisa amabhokisi e-set-top ukuguqula amasiginali we-DSL abe yizinsizakalo ze-TV.
Okuqukethwe okubaluleke kakhulu kwe-IPTV Beler kufaka izinhlelo ze-VOD ne-TV. Ukuze uqinisekise ukuthi ikhwalithi ye-IPTV ye-IPTV ifaniswa neyenethiwekhi yamakhamera yamanje, i-IPTV Beler Network iyadingeka ukuhlinzeka ngeziqinisekiso ku-bandwidth, ukushintshwa kwenethiwekhi, futhi lezi zici ze-DSL ze-DSL azikwazi ukufeza izidingo ze-IPTV, kanye ne-DSL Support ye-Multicast ilinganiselwe. Ama-protocol ama-protocol ama-protocol, awasekeli i-multicast. Yize ngokomqondo kusekhona indawo yokuthuthukisa ubuchwepheshe be-DSL, kunezinguquko ezimbalwa ze-bandwidth.
3, izici zobuchwepheshe beWimax
I-Wimax yi-Broadband Wireless Technology esekelwe ku-IEEE802.16 ejwayelekile, okuyinto entsha ejwayelekile yomoya ejwayelekile ehlongozwe ama-microwave nama-millimeter wave band. Inganikeza isilinganiso esifinyelela ku-75Mbit / S STRANCE STRANCE, I-SINGE BASE STATETAGE IYA KU-50KM. I-Wimax yenzelwe ama-Wireless LANS futhi ixazulule inkinga yemigwaqo yokugcina yokufinyelela ebanzi, isetshenziselwa ukuxhumanisa i-Wi-Fi "Hotspots" kulayini we-Backbone, ongasetshenziswa njengentambo nomugqa we-DTH. Ingasetshenziswa futhi ukuxhumanisa izimo ezinjengebhizinisi noma ikhaya kumgogodla olimele, futhi lungasetshenziswa njengesandiso esingenantambo ku-cable ne-DSL ukunika amandla ukufinyelela kwe-broadband ye-wireless.
I-4, i-Wimax ibona ukufinyelela okungenantambo kwe-IPTV
(1) Izidingo ze-IPTV kunethiwekhi yokufinyelela
Isici esiyinhloko sensizakalo ye-IPTV ukusebenzelana kwayo kanye nesikhathi sangempela. Nge-IPTV Service, abasebenzisi bangajabulela ikhwalithi ephezulu (eduze nezinga le-DVD) izinsizakalo zemidiya yedijithali, futhi bangakwazi ukukhetha ngokukhululeka izinhlelo zevidiyo kusuka kumanethiwekhi we-Broadband, babone ukuxhumana okukhulu phakathi kwabahlinzeki bemidiya nabathengi bemidiya.
Ukuze uqinisekise ukuthi ikhwalithi ye-IPTV ye-IPTV ifaniswa neyenethiwekhi yamanje yekhebula, i-IPTV Access Network iyadingeka ukuze ikwazi ukunikeza iziqinisekiso ngokuya nge-bandwidth, isiteshi sokushintsha i-latency, inethiwekhi Qos, njalonjalo. Ngokuya nge-bandwidth yokungena komsebenzisi, ukusetshenziswa kobuchwepheshe obukhona bokufaka amakhodi asetshenziswayo, abasebenzisi badinga okungenani i-bandwidth yokufinyelela okungu-3 ~ 4bit / s ephansi, uma ukudluliswa kwevidiyo ephezulu, i-bandwidth edingekayo nayo iphakeme; Esihlalweni esishintshana naye ukubambezeleka, ukuze uqinisekise ukuthi abasebenzisi be-IPTV bashintsha phakathi kweziteshi ezihlukene kanye nokushintshwa kwe-TV okujwayelekile, ukuhanjiswa okugcwele kwezinsizakalo ze-IPTV kudinga okungenani ukusekelwa komugqa we-multicast Multicast; Ngokuya nge-Network Qos, ukuvikela ukulahleka kwephakethe, iJitter kanye neminye umthelela kwikhwalithi yokubuka kwe-IPTV.
(2) Ukuqhathaniswa kwendlela yokufinyelela ye-WiMAX nge-DSL, Wi-Fi ne-FTTX Access Way
I-DSL, ngenxa yezingqinamba zayo zobuchwepheshe, kusenezinkinga eziningi ngokuya ngebanga, isilinganiso namanani aphumayo. Uma kuqhathaniswa ne-DSL, i-Wimax ingamboza nge-theory ndawo enkulu, ihlinzeke ngamanani wedatha esheshayo, inesilinganiso esikhulu kanye neziqinisekiso ze-QOS eziphezulu.
Uma kuqhathaniswa ne-Wi-Fi, i-Wimax inezinzuzo zobuchwepheshe zokumboza okubanzi, ukuguqulwa kwe-band ebanzi, i-QLUS) I-Internet yendawo yendawo (i-Intranet yokungena ngaphakathi, emahhovisi, noma izindawo ze-hotspot; I-Wimax isuselwe ku-Wirax engenantambo isuselwa ku-Wireless Metropolitan Area Network (WMAN) ejwayelekile, esetshenziselwa ikakhulukazi insiza yokufinyelela yedatha ephezulu ngaphansi kweselula eshisiwe ne-low-speed mobile.
I-FTTB + LAN, njengendlela yokufinyelela ye-Broadband ephezulu, iyaqhubekaI-IPTVInkonzo ngaphandle kwenkinga enkulu ngobuchwepheshe, kepha ikhawulelwe yinkinga ye-wiring ehlanganisiwe esakhiweni, izindleko zokufaka kanye nebanga lokuhambisa elibangelwa ikhebula elisontekile. Izici zokuhambisa ezikahle ze-Wimax ezingekho emgqeni, ukuhanjiswa okuguqukayo kanye nokucushwa kwensiza enhle, ikhwalithi ephezulu ye-QOS yesevisi nokuphepha okuqinile konke kwenza indlela efanelekile yokufinyelela ye-IPTV.
(3) Izinzuzo ze-Wimax ekufezeni ukufinyelela okungenantambo ku-IPTV
Ngokuqhathanisa i-WiMAX nge-DSL, i-Wi-Fi ne-FTTX, kungabonakala ukuthi i-Wimax iyisinqumo esingcono ekufezekiseni ukufinyelela kwe-IPTV. Kusukela ngoMeyi 2006, inani lamalungu eWimax Forum amalungu akhula laba ngu-356, kanti nabasebenza ngaphezulu kuka-120 emhlabeni wonke bajoyine le nhlangano. I-Wimax izoba ubuchwepheshe obuhle ukuxazulula imayela yokugcina ye-IPTV. I-Wimax izoba nenye indlela engcono ku-DSL ne-Wi-Fi.
(4) Ukuqaphela kwe-WiMAX kokufinyelela kwe-IPTV
I-IEEE802.16-2004 Engabhalansi iqondiswe kuma-terminals ahleliwe, ibanga eliphakeme lokuhambisa lingu-7 ~ 10km, futhi i-bandwidth yesiteshi ngasinye siphakathi kwe-1.25 ~ 20mhz. Lapho i-bandwidth ingu-20 mhz, inani eliphakeme le-Ieee 802.16a lingafinyelela ku-75 MBIT / STIC MBT / S; Lapho i-bandwidth ingu-10 mhz, inganikeza isilinganiso esijwayelekile sokuhambisa se-MBT / S.
Amanethiwekhi weWimax asekela amamodeli webhizinisi anemibala. Izinsizakalo zedatha zamanani ahlukene yithagethi enkulu ye-Network.Wimax isekela amazinga ahlukene we-Qos, ngakho-ke ukumbozwa kwenethiwekhi kuhlobene kakhulu nohlobo lwensiza. Ngokuya nge-IPTV Access. Ngoba i-IPTV idinga ukuqinisekiswa okuphezulu kwe-QOS namazinga okuhambisa ngejubane eliphezulu. Ngakho-ke inethiwekhi ye-WiMAX isethelwe ngokunengqondo ngokuya ngenani labasebenzisi kule ndawo nezidingo zabo. Lapho abasebenzisi befinyelela inethiwekhi ye-IPTV. Asikho isidingo sokwenza izintambo futhi, kudingeka kuphela ukwengeza imishini yokuthola i-WiMAX nebhokisi le-IP elisethiwe, ngakho-ke abasebenzisi bangasebenzisa insiza ye-IPTV kalula futhi ngokushesha.
Njengamanje, i-IPTV yibhizinisi elisafufusa elinamandla amakhulu emakethe, futhi ukuthuthukiswa kwalo kusekusencane. Umkhuba wokuthuthuka kwawo kwesikhathi esizayo ukuhlanganisa ukuhlanganisa izinsizakalo ze-IPTV ngama-terminals, futhi i-TV izoba yi-terminal ebanzi yedijithali yedijithali enemisebenzi yezokuxhumana neyemisebenzi ye-Intanethi. Kepha i-IPTV ukufeza impumelelo ngomqondo weqiniso, hhayi ukuxazulula inkinga yokuqukethwe, kepha futhi ukuxazulula ibhodlela lekhilomitha lokugcina.
Isikhathi sePosi: Dec-05-2024