Tun da IPTV ta shiga kasuwa a cikin 1999, haɓakar haɓaka ya haɓaka a hankali. Ana sa ran masu amfani da IPTV na duniya za su kai fiye da miliyan 26 nan da shekarar 2008, kuma adadin karuwar masu amfani da IPTV a kasar Sin a shekara ta 2003 zuwa 2008 zai kai kashi 245%.
Bisa ga binciken, na karshe kilomita naIPTVAna amfani da damar da aka fi amfani da ita a cikin yanayin samun damar kebul na DSL, ta hanyar bandwidth da kwanciyar hankali da sauran dalilai, IPTV a cikin gasar tare da TV na yau da kullum yana da lahani, kuma hanyar haɗin kebul na gina farashi yana da girma, sake zagayowar yana da tsawo, kuma yana da wahala. Don haka, yadda ake warware matsalar samun damar zuwa mil na ƙarshe na IPTV yana da mahimmanci musamman.
WiMAX (WorldwideInteroper-ability for Microwave Access) fasaha ce ta hanyar shiga mara waya ta hanyar sadarwa ta hanyar IEEE802.16 jerin ladabi, wanda a hankali ya zama sabon wurin ci gaba don fasahar mara waya ta metro broadband. Yana iya maye gurbin DSL data kasance da haɗin haɗin waya don samar da ƙayyadaddun, nau'ikan wayar hannu na hanyoyin sadarwa mara waya. Saboda ƙarancin kuɗin gini, babban aikin fasaha da babban abin dogaro, zai zama mafi kyawun fasaha don warware matsalar samun damar nisan mil na ƙarshe na IPTV.
2, halin yanzu na fasahar samun damar IPTV
A halin yanzu, fasahar samun damar da aka saba amfani da ita don samar da sabis na IPTV sun haɗa da DSL mai sauri, FTTB, FTTH da sauran fasahohin shiga layi. Saboda ƙananan saka hannun jari a cikin amfani da tsarin DSL na yanzu don tallafawa ayyukan IPTV, 3/4 na masu gudanar da sadarwa a Asiya suna amfani da akwatunan saiti don canza siginar DSL zuwa siginar TV don samar da sabis na IPTV.
Mafi mahimmancin abubuwan da ke cikin mai ɗaukar IPTV sun haɗa da VOD da shirye-shiryen TV. Don tabbatar da cewa ingancin kallon IPTV ya yi daidai da na cibiyar sadarwa na USB na yanzu, ana buƙatar cibiyar sadarwa mai ɗaukar IPTV don samar da garanti a cikin bandwidth, jinkirin sauya tashar tashar, cibiyar sadarwa QoS, da dai sauransu, kuma waɗannan sassan fasahar DSL ba su iya biyan bukatun IPTV, kuma goyon bayan DSL don multicast yana iyakance. IPv4 protocol routers, ba sa goyan bayan multicast. Ko da yake a ka'idar akwai sauran damar haɓaka fasahar DSL, akwai ƴan canje-canje masu inganci a bandwidth.
3, Halayen fasahar WiMAX
WiMAX fasaha ce ta hanyar isa ga mara waya ta broadband bisa ma'aunin IEEE802.16, wanda shine sabon ma'aunin mu'amalar iska wanda aka yi niyya don maƙallan raƙuman ruwa na millimita. Zai iya samar da adadin watsawa har zuwa 75Mbit/s, tashar tashar tushe guda ɗaya har zuwa 50km. An ƙera WiMAX don LANs mara igiyar waya kuma don magance matsalar mil na ƙarshe na hanyar sadarwa ta hanyar sadarwa, ana amfani da ita don haɗa Wi-Fi "masu zafi" zuwa Intanet, amma kuma don haɗa yanayin kamfani ko gida zuwa layin kashin baya mai waya, wanda za'a iya amfani dashi azaman kebul da layin DTH, kuma ana iya amfani dashi azaman kebul da layin DTH. Hakanan za'a iya amfani dashi don haɗa mahalli kamar kasuwanci ko gida zuwa kashin baya mai waya, kuma ana iya amfani dashi azaman faɗaɗa mara waya zuwa kebul da DSL don ba da damar shiga hanyoyin sadarwa mara waya.
4. WiMAX gane damar mara waya ta IPTV
(1) Abubuwan buƙatun IPTV akan hanyar sadarwar shiga
Babban fasalin sabis ɗin IPTV shine hulɗar sa da kuma ainihin lokacin. Ta hanyar sabis na IPTV, masu amfani za su iya jin daɗin ingantacciyar inganci (kusa da matakin DVD) sabis na kafofin watsa labaru na dijital, kuma za su iya zaɓar shirye-shiryen bidiyo kyauta daga cibiyoyin sadarwar IP na watsa shirye-shirye, fahimtar ma'amala mai mahimmanci tsakanin masu samar da kafofin watsa labarai da masu siye da kafofin watsa labarai.
Don tabbatar da cewa ingancin kallon IPTV ya yi daidai da na cibiyar sadarwa na USB na yanzu, ana buƙatar hanyar sadarwar IPTV don samun damar samar da garanti dangane da bandwidth, latency canza tashar tashar, cibiyar sadarwa QoS, da sauransu. A cikin sharuddan damar amfani da bandwidth mai amfani, amfani da fasahar coding da ake amfani da su da yawa, masu amfani suna buƙatar aƙalla 3 ~ 4Mbit / s downlink access bandwidth, idan watsa bidiyo mai inganci, bandwidth ɗin da ake buƙata shima ya fi girma; a cikin jinkirin sauya tashar tashar, don tabbatar da cewa masu amfani da IPTV suna canzawa tsakanin tashoshi daban-daban da kuma TV na yau da kullun suna canza aikin iri ɗaya, ƙaddamar da ayyukan IPTV da yawa yana buƙatar aƙalla dijital Subscriber layin samun damar kayan aikin multicast (DSLAM) don tallafawa fasahar multicast na IP; dangane da hanyar sadarwar QoS, don hana asarar fakiti, jitter da sauran tasiri akan ingancin kallon IPTV.
(2) Kwatanta hanyar shiga WiMAX tare da DSL, Wi-Fi da hanyar shiga FTTx
DSL, saboda ƙayyadaddun fasaha na kansa, har yanzu akwai matsaloli da yawa ta fuskar nesa, ƙima da ƙimar fita. Idan aka kwatanta da DSL, WiMAX na iya a ka'ida ya rufe wani yanki mafi girma, samar da ƙimar bayanai cikin sauri, yana da girma girma da garantin QoS mafi girma.
Idan aka kwatanta da Wi-Fi, WiMAX yana da fa'idodin fasaha na ɗaukar hoto mai faɗi, daidaitawar bandeji mai ƙarfi, haɓaka ƙarfi mai ƙarfi, QoS mafi girma da tsaro, da dai sauransu Wi-Fi ya dogara ne akan ƙa'idodin Wutar Wuta ta Mara waya (WLAN), kuma galibi ana amfani da ita don kusanci-rarrabuwar Intanet/Intranet damar shiga cikin gida, a cikin ofisoshi, ko wuraren hotspot; WiMAX ya dogara ne akan WiMAX mara igiyar waya ya dogara ne akan ma'aunin cibiyar sadarwa na yanki mara waya (WMAN), wanda galibi ana amfani dashi don sabis na samun bayanai mai sauri a ƙarƙashin ƙayyadaddun wayar hannu da ƙananan sauri.
FTTB + LAN, a matsayin hanyar samun hanyar sadarwa mai sauri, yana aiwatarwaIPTVsabis ba tare da matsala mai yawa ta hanyar fasaha ba, amma an iyakance shi ta hanyar matsalar haɗaɗɗun wayoyi a cikin ginin, farashin shigarwa da nisa watsawa ta hanyar igiyoyi masu murdawa. WiMAX's manufa ba-line-na-gani watsa halaye, m turawa da daidaitawa scalability, m QoS ingancin sabis da kuma karfi tsaro duk sanya shi manufa hanyar samun damar IPTV.
(3) Fa'idodin WiMAX a cikin sanin damar mara waya zuwa IPTV
Ta hanyar kwatanta WiMAX tare da DSL, Wi-Fi da FTTx, ana iya ganin cewa WiMAX shine mafi kyawun zaɓi a fahimtar samun damar IPTV. Tun daga watan Mayu 2006, yawan membobin dandalin WiMAX ya karu zuwa 356, kuma fiye da masu aiki 120 a duniya sun shiga kungiyar. WiMAX zai zama kyakkyawar fasaha don warware mil na ƙarshe na IPTV. WiMAX kuma zai zama mafi kyawun madadin DSL da Wi-Fi.
(4) Fahimtar WiMAX na Samun damar IPTV
IEEE802.16-2004 misali ne yafi daidaitacce zuwa kafaffen tashoshi, matsakaicin watsa nisa ne 7 ~ 10km, da kuma sadarwarka band ne kasa da 11GHz, rungumi dabi'ar tasha hanya, da kuma bandwidth na kowane tashar ne tsakanin 1.25 ~ 20MHz. Lokacin da bandwidth ya kasance 20 MHz, matsakaicin adadin IEEE 802.16a zai iya kaiwa 75 Mbit/s, gabaɗaya 40 Mbit/s; lokacin da bandwidth ya kasance 10 MHz, zai iya samar da matsakaicin watsawa na 20 Mbit/s.
Cibiyoyin sadarwar WiMAX suna goyan bayan samfuran kasuwanci masu launi. Ayyukan bayanai na ƙididdiga daban-daban sune babban manufa na cibiyar sadarwa.WiMAX yana goyan bayan matakan QoS daban-daban, don haka kewayon cibiyar sadarwa yana da alaƙa da nau'in sabis ɗin. Dangane da samun damar IPTV. saboda IPTV yana buƙatar babban tabbacin QoS da ƙimar watsa bayanai mai sauri. don haka an saita hanyar sadarwar WiMAX bisa ga yawan masu amfani a yankin da bukatunsu. Lokacin da masu amfani suka shiga hanyar sadarwar IPTV. Babu buƙatar sake aiwatar da wayoyi, kawai buƙatar ƙara kayan aikin karɓar WiMAX da akwatin saiti na IP, don haka masu amfani za su iya amfani da sabis na IPTV cikin dacewa da sauri.
A halin yanzu, IPTV kasuwanci ne mai tasowa tare da babban damar kasuwa, kuma ci gabansa yana kan ƙuruciya. Halin ci gabanta na gaba shine don ƙara haɗa ayyukan IPTV tare da tashoshi, kuma TV za ta zama cikakkiyar tashar gida ta dijital tare da sadarwa da ayyukan Intanet. Amma IPTV don cimma nasara a cikin ma'anar gaskiya, ba kawai don magance matsalar abun ciki ba, amma har ma don magance matsalolin da ke cikin kilomita na karshe.
Lokacin aikawa: Dec-05-2024