Kuyambira IPTV idalowa pamsika mu 1999, kukula kwachulukira pang'onopang'ono. Zikuyembekezeka kuti ogwiritsa ntchito padziko lonse lapansi IPTV afika opitilira 26 miliyoni pofika 2008, komanso kuchuluka kwapachaka kwa ogwiritsa ntchito IPTV ku China kuyambira 2003 mpaka 2008 kudzafika 245%.
Malinga ndi kafukufuku, makilomita otsiriza aIPTVKufikira kumagwiritsidwa ntchito nthawi zambiri mumayendedwe amtundu wa chingwe cha DSL, ndi bandwidth ndi kukhazikika ndi zinthu zina, IPTV pampikisano ndi TV wamba ili pachiwopsezo, ndipo njira yolumikizira chingwe yomangira mtengo ndi yokwera, kuzungulira kwanthawi yayitali, ndi zovuta. Chifukwa chake, momwe mungathetsere vuto lofikira la mailosi omaliza a IPTV ndikofunikira kwambiri.
WiMAX (WorldwideInteroper-abilityforMicrowave Access) ndiukadaulo wofikira opanda zingwe wopanda zingwe zozikidwa pa ma protocol a IEEE802.16, omwe pang'onopang'ono asanduka malo otukuka aukadaulo opanda zingwe a metro. Itha kulowa m'malo mwa DSL yomwe ilipo ndi ma waya kuti ipereke mawonekedwe osasunthika, olumikizana ndi ma waya opanda zingwe. Chifukwa cha mtengo wake wotsika mtengo womanga, luso lapamwamba laukadaulo komanso kudalirika kwakukulu, idzakhala ukadaulo wabwinoko kuthana ndi vuto lofikira la mailosi omaliza a IPTV.
2, momwe zinthu ziliri paukadaulo wa IPTV
Pakadali pano, matekinoloje omwe amagwiritsidwa ntchito nthawi zambiri kuti apereke ntchito za IPTV akuphatikiza ma DSL othamanga kwambiri, FTTB, FTTH ndi matekinoloje ena ofikira pawaya. Chifukwa cha ndalama zochepa zogwiritsira ntchito makina a DSL omwe alipo kuti athandizire IPTV ntchito, 3/4 mwa ogwira ntchito pa telecom ku Asia amagwiritsa ntchito mabokosi apamwamba kuti asinthe zizindikiro za DSL kukhala zizindikiro za TV kuti apereke IPTV ntchito.
Zomwe zili zofunika kwambiri pazonyamula IPTV zikuphatikiza mapulogalamu a VOD ndi TV. Pofuna kuwonetsetsa kuti mawonekedwe a IPTV akufanana ndi ma network omwe ali pano, IPTV bearer network ikufunika kuti ipereke zitsimikizo mu bandwidth, kuchedwa kwa kusintha kwa ma channel, network QoS, ndi zina zotero, ndipo mbali izi za teknoloji ya DSL sizingatheke. kukwaniritsa zofunikira za IPTV, ndipo chithandizo cha DSL cha multicast ndi chochepa. IPv4 protocol routers, sagwirizana ndi ma multicast. Ngakhale kuti mwachidziwitso pali malo oti mukweze ukadaulo wa DSL, pali zosintha zochepa mu bandwidth.
3, mawonekedwe aukadaulo wa WiMAX
WiMAX ndi ukadaulo wofikira opanda zingwe wopanda zingwe kutengera mulingo wa IEEE802.16, womwe ndi mulingo watsopano wa mawonekedwe a mpweya wokonzedwera ma microwave ndi ma millimeter wave band. Itha kupereka mpaka 75Mbit/s transmission rate, single base station coverage mpaka 50km. WiMAX idapangidwa kuti ikhale ma LAN opanda zingwe ndikuthana ndi vuto la mtunda womaliza wofikira burodibandi, imagwiritsidwa ntchito kulumikiza malo ochezera a Wi-Fi pa intaneti, komanso kulumikiza chilengedwe cha kampani kapena nyumba ku mzere wa waya wamsana. , yomwe ingagwiritsidwe ntchito ngati chingwe ndi mzere wa DTH, ndipo ingagwiritsidwe ntchito ngati chingwe ndi mzere wa DTH. Itha kugwiritsidwanso ntchito kulumikiza madera monga bizinesi kapena nyumba ku msana wamawaya, ndipo ingagwiritsidwe ntchito ngati cholumikizira opanda zingwe ku chingwe ndi DSL kuti athe kulumikiza opanda zingwe.
4, WiMAX amazindikira mwayi wopanda zingwe wa IPTV
(1) Zofunikira za IPTV pa intaneti
Chofunikira chachikulu cha ntchito ya IPTV ndikulumikizana kwake komanso nthawi yeniyeni. Kupyolera mu ntchito ya IPTV, ogwiritsa ntchito amatha kusangalala ndi ntchito zapamwamba kwambiri (pafupi ndi ma DVD) digito media media, ndipo amatha kusankha mwaufulu mapulogalamu amakanema kuchokera pa intaneti ya Broadband IP, pozindikira kuyanjana kwakukulu pakati pa opereka ma TV ndi ogula media.
Kuti muwonetsetse kuti mawonekedwe owonera a IPTV akufanana ndi maukonde amakono a chingwe, IPTV network network ikufunika kuti ipereke zitsimikizo potengera bandwidth, njira yosinthira latency, network QoS, ndi zina zotero. Pankhani ya osuta mwayi bandiwifi, kugwiritsa ntchito alipo ambiri zolembedwa luso luso, owerenga ayenera osachepera 3 ~ 4Mbit / s downlink kupeza bandiwifi, ngati kufala kwa apamwamba kanema kanema, ndi bandiwifi chofunika nawonso apamwamba; pakuchedwa kwa kusintha kwa tchanelo, pofuna kuwonetsetsa kuti ogwiritsa ntchito IPTV akusintha pakati pa matchanelo osiyanasiyana ndi ma TV wamba akusintha magwiridwe antchito omwewo, kufalikira kwa ntchito za IPTV kumafuna osachepera zida za digito za Subscriber line access multiplexing equipment (DSLAM) kuti zithandizire ukadaulo wa IP multicast; kutengera netiweki QoS, kupewa kutayika kwa paketi, jitter ndi zina zomwe zimakhudza mtundu wa IPTV kuwonera.
(2) Kuyerekeza njira yofikira ya WiMAX ndi njira ya DSL, Wi-Fi ndi FTTx
DSL, chifukwa cha zovuta zake zaukadaulo, pali mavuto ambiri patali, kuchuluka ndi kuchuluka komwe kumatuluka. Poyerekeza ndi DSL, WiMAX imatha kubisa malo okulirapo, kupereka ma data mwachangu, kukhala ndi scalability komanso zitsimikizo zapamwamba za QoS.
Poyerekeza ndi Wi-Fi, WiMAX ili ndi luso laukadaulo la kufalikira kokulirapo, kusintha kwa bandi mokulira, scalability yamphamvu, QoS yapamwamba ndi chitetezo, ndi zina zambiri. Wi-Fi idakhazikitsidwa pamtundu wa Wireless Local Area Network (WLAN), ndipo imagwiritsidwa ntchito kwambiri kufalikira kwa intaneti/Intaneti m'nyumba, m'maofesi, kapena m'malo opezeka anthu ambiri; WiMAX imachokera pa Wireless WiMAX yochokera pamtundu wa Wireless metropolitan area network (WMAN), womwe umagwiritsidwa ntchito kwambiri pothandizira kupeza deta yothamanga kwambiri pansi pa foni yokhazikika komanso yotsika kwambiri.
FTTB + LAN, monga njira yolumikizira yothamanga kwambiri, imagwiraIPTVntchito popanda vuto lalikulu mwaukadaulo, koma imachepetsedwa ndi vuto la mawaya ophatikizika mnyumba, mtengo woyika komanso mtunda wotumizira chifukwa cha chingwe chopindika. Makhalidwe abwino a WiMAX osagwirizana ndi mzere wamaso, kutumiza kosinthika ndi kasinthidwe kachitidwe, khalidwe labwino kwambiri la QoS ndi chitetezo champhamvu zonse zimapangitsa kuti ikhale njira yabwino yopezera IPTV.
(3) Ubwino wa WiMAX pakuzindikira mwayi wopanda zingwe ku IPTV
Poyerekeza WiMAX ndi DSL, Wi-Fi ndi FTTx, zitha kuwoneka kuti WiMAX ndiye chisankho chabwinoko pakuzindikira mwayi wa IPTV. Pofika mu May 2006, chiwerengero cha mamembala a WiMAX Forum chinakula kufika pa 356, ndipo oposa 120 ogwira ntchito padziko lonse lapansi alowa nawo bungwe. WiMAX idzakhala teknoloji yabwino yothetsera mtunda wotsiriza wa IPTV. WiMAX idzakhalanso njira yabwinoko kuposa DSL ndi Wi-Fi.
(4) Kuzindikira kwa WiMAX kwa IPTV Access
Muyezo wa IEEE802.16-2004 umakhala wolunjika kumaterminal okhazikika, mtunda wodutsa kwambiri ndi 7 ~ 10km, ndipo gulu lake lolumikizirana ndi lotsika kuposa 11GHz, kutengera njira yosankha, ndipo bandwidth ya njira iliyonse ili pakati pa 1.25 ~ 20MHz. Pamene bandiwifi ndi 20 MHz, mlingo pazipita IEEE 802.16a akhoza kufika 75 Mbit/s, zambiri 40 Mbit/s; pamene bandiwifi ndi 10 MHz, akhoza kupereka pafupifupi kufala mlingo wa 20 Mbit/s.
Maukonde a WiMAX amathandizira mitundu yamabizinesi okongola. Ntchito za data zamitengo yosiyana ndizo cholinga chachikulu cha network.WiMAX imathandizira magawo osiyanasiyana a QoS, kotero kuwulutsa maukonde kumagwirizana kwambiri ndi mtundu wautumiki. Pankhani ya IPTV kupeza. chifukwa IPTV imafuna chitsimikiziro chapamwamba cha QoS ndi maulendo othamanga kwambiri otumizira deta. kotero maukonde a WiMAX amakhazikitsidwa moyenera malinga ndi kuchuluka kwa ogwiritsa ntchito mderali komanso zosowa zawo. Pamene ogwiritsa ntchito IPTV network. Palibe chifukwa chopangira ma waya kachiwiri, muyenera kuwonjezera zida zolandirira za WiMAX ndi bokosi lapamwamba la IP, kuti ogwiritsa ntchito agwiritse ntchito IPTV ntchito mosavuta komanso mwachangu.
Pakadali pano, IPTV ndi bizinesi yomwe ikubwera yomwe ili ndi mwayi waukulu wamsika, ndipo chitukuko chake chikadali chaching'ono. Zomwe zikuchitika m'tsogolomu ndikuphatikizanso ntchito za IPTV ndi ma terminals, ndipo TV idzakhala malo ochezera a digito okhala ndi kulumikizana ndi intaneti. Koma IPTV kuti ikwaniritse bwino m'lingaliro lenileni, osati kuthetsa vutoli, komanso kuthetsa vuto la kilomita yotsiriza.
Nthawi yotumiza: Dec-05-2024