Kubva IPTV yakapinda mumusika muna 1999, mwero wekukura wakawedzera zvishoma nezvishoma. Zvinotarisirwa kuti pasi rose IPTV vashandisi vachasvika vanopfuura 26 miriyoni panosvika 2008, uye kuwedzera kwepagore kukura kwevashandisi veIPTV muChina kubva 2003 kusvika 2008 kuchasvika 245%.
Maererano neongororo, kiromita yekupedzisira yeIPTVkuwana kunowanzoshandiswa muDSL cable access mode, ne bandwidth uye kugadzikana nezvimwe zvinhu, IPTV mumakwikwi neTV yakajairwa iri panjodzi, uye tambo yekuwana nzira yekuvaka yemutengo yakakwirira, kutenderera kwakareba, uye zvakaoma. Naizvozvo, maitiro ekugadzirisa dambudziko rekupedzisira-mamaira yekuwana IPTV inonyanya kukosha.
WiMAX (WorldwideInteroper-abilityforMicrowave Access) ndeye Broadband Wireless access tekinoroji yakavakirwa paIEEE802.16 nhevedzano yemaprotocol, iyo zvishoma nezvishoma yave nzvimbo itsva yekusimudzira ye metro Broadband Wireless tekinoroji. Inogona kutsiva iyo iripo DSL uye wired yekubatanidza kuti ipe yakagadzika, nharembozha mafomu ewireless Broadband yekubatanidza. Nekuda kwemutengo wakaderera wekuvaka, kuita kwehunyanzvi hwekuita uye kuvimbika kwakanyanya, ichave iri nani tekinoroji yekugadzirisa dambudziko rekupedzisira-mamaira yekuwana IPTV.
2, mamiriro azvino eIPTV yekuwana tekinoroji
Parizvino, matekinoroji ekuwana anowanzo shandiswa kupa IPTV masevhisi anosanganisira yakakwira-kumhanya DSL, FTTB, FTTH uye humwe hunyanzvi hwekuwana waya. Nekuda kwekudyara kwakaderera mukushandisa iripo DSL system kutsigira IPTV masevhisi, 3/4 yevafambisi venhare muAsia vanoshandisa set-yepamusoro mabhokisi kushandura masaini eDSL kuita masaini eTV kupa IPTV masevhisi.
Izvo zvakanyanya kukosha zvirimo zveIPTV mutakuri zvinosanganisira VOD uye TV zvirongwa. Kuti ive nechokwadi chekuti IPTV yekuona mhando inofananidzwa neiyo yazvino tambo network, IPTV mutakuri network inodiwa kuti ipe vimbiso mubandwidth, chiteshi switching kunonoka, network QoS, nezvimwe, uye izvi zvinhu zveDSL tekinoroji hazvigone. kuzadzisa zvinodiwa neIPTV, uye iyo DSL tsigiro yemulticast ishoma. IPv4 protocol routers, haitsigire multicast. Kunyangwe ne theoretically kuchine nzvimbo yekusimudzira DSL tekinoroji, kune mashoma emhando shanduko mubandwidth.
3, maitiro eWiMAX tekinoroji
WiMAX ibroadband wireless access tekinoroji yakavakirwa paIEEE802.16 chiyero, inova itsva air interface standard yakarongedzerwa microwave uye millimeter wave mabhendi. Inogona kupa kusvika ku75Mbit/s transmission rate, single base station coverage inosvika 50km. WiMAX yakagadzirirwa maLAN asina waya uye kugadzirisa dambudziko rekupedzisira mamaira yekuwana Broadband, inoshandiswa kubatanidza Wi-Fi "hotspots" kuInternet, asiwo kubatanidza nharaunda yekambani kana imba kune wired backbone line. , iyo inogona kushandiswa setambo uye mutsara weDTH, uye inogona kushandiswa setambo uye mutsara weDTH. Inogona zvakare kushandiswa kubatanidza nharaunda dzakadai sebhizinesi kana imba kumusana wewaya, uye inogona kushandiswa sewaya isina waya yekuwedzera kune tambo uye DSL kugonesa isina waya Broadband kuwana.
4, WiMAX inoona isina waya yeIPTV
(1) Zvinodiwa zveIPTV pane yekuwana network
Chinhu chikuru cheIPTV sevhisi ndeyekudyidzana kwayo uye chaiyo-nguva. Kuburikidza neIPTV sevhisi, vashandisi vanogona kunakidzwa nemhando yepamusoro (padhuze neiyo DVD level) dhijitari midhiya masevhisi, uye vanogona vakasununguka kusarudza zvirongwa zvevhidhiyo kubva Broadband IP network, vachiona kudyidzana kwakakura pakati pevanopa midhiya nevatengi venhau.
Kuti uone kuti kutarisa kwehutano hweIPTV hunofananidzwa neiyo ikozvino tambo network, iyo IPTV yekuwana network inodiwa kuti ikwanise kupa vimbiso maererano nebandwidth, chiteshi switching latency, network QoS, zvichingodaro. Panyaya yekushandiswa kwemushandisi bandwidth, kushandiswa kweiyo iripo yakawanda yakashandiswa coding tekinoroji, vashandisi vanoda zvishoma 3 ~ 4Mbit / s downlink access bandwidth, kana kutapurirana kwemhando yepamusoro vhidhiyo, iyo inodiwa bandwidth zvakare yakakwirira; muchiteshi chekuchinja kunonoka, kuitira kuti ive nechokwadi chekuti vashandisi veIPTV vanochinja pakati pezviteshi zvakasiyana uye zvakajairwa TV ichichinja kuita kwakafanana, kupararira kwakapararira kweIPTV masevhisi kunoda kanenge dijitari Subscriber line yekuwana multiplexing michina (DSLAM) kutsigira IP multicast tekinoroji; maererano netiweki QoS, kudzivirira kurasikirwa kwepaketi, jitter uye kumwe kukanganisa pamhando yeIPTV yekuona.
(2) Kuenzanisa kweWiMAX nzira yekuwana neDSL, Wi-Fi uye FTTx nzira yekuwana
DSL, nekuda kwezvipingamupinyi zvayo zvehunyanzvi, kuchine matambudziko mazhinji maererano nedaro, chiyero uye chiyero chinobuda. Kuenzaniswa neDSL, WiMAX inogona kuvharidzira nzvimbo yakakura, inopa nekukurumidza data data, kuva nehukuru scalability uye yakakwirira QoS vimbiso.
Kana ichienzaniswa neWi-Fi, WiMAX ine mabhenefiti ehunyanzvi hwekuvharika kwakafara, kuchinjika kwebhendi, kusimba kwakasimba, QoS yakakwirira uye kuchengetedzeka, nezvimwewo. Wi-Fi yakavakirwa paWireless Local Area Network (WLAN) chiyero, uye inonyanya kushandiswa pedyo-yakaparadzirwa Internet/Intranet kupinda mukati, mumahofisi, kana nzvimbo dzehotspot; WiMAX yakavakirwa paWireless WiMAX yakavakirwa pane isina waya metropolitan area network (WMAN) chiyero, iyo inonyanya kushandiswa kune yakakwirira-kumhanya yekuwana data sevhisi pasi peyakagadziriswa uye yakaderera-kumhanya nhare.
FTTB + LAN, seyakakwira-kumhanya nzira yekuwana Broadband, inoitaIPTVsevhisi isina dambudziko rakawanda tekinoroji, asi inoganhurwa nedambudziko rekubatanidza wiring muchivako, kuisirwa mutengo uye kureba kwekufambisa kunokonzerwa neyakamonyoroka-peya tambo. WiMAX's yakanaka isiri-mutsara-ye-yekuona yekufambisa maitiro, inochinjika kutumirwa uye gadziriso scalability, yakanakisa QoS mhando yebasa uye kuchengetedzeka kwakasimba zvese zvinoita kuti ive yakanaka yekuwana nzira yeIPTV.
(3) Zvakanakira WiMAX mukuona isina waya kupinda IPTV
Nekuenzanisa WiMAX neDSL, Wi-Fi uye FTTx, zvinogona kuoneka kuti WiMAX ndiyo sarudzo iri nani pakuziva kuwana IPTV. Kubva muna Chivabvu 2006, nhamba yenhengo dzeWiMAX Forum yakakura kusvika pa356, uye vanopfuura 120 vanoshanda pasi rese vakapinda musangano. WiMAX ichave yakanakira tekinoroji kugadzirisa iyo yekupedzisira mamaira yeIPTV. WiMAX ichavawo imwe nzira iri nani kune DSL uye Wi-Fi.
(4) WiMAX Kuzadzikiswa kweIPTV Access
IEEE802.16-2004 yakajairwa inonyanya kutariswa kune yakatarwa materminals, iyo yakanyanya kureba yekufambisa nhambwe i7 ~ 10km, uye bhendi rayo rekutaurirana rakaderera pane 11GHz, richitora nzira yekusarudza nzira, uye bandwidth yechiteshi chimwe nechimwe chiri pakati pe1.25 ~ 20MHz. Kana bandwidth iri 20 MHz, chiyero chepamusoro cheIEEE 802.16a chinogona kusvika 75 Mbit / s, kazhinji 40 Mbit / s; kana bandwidth iri 10 MHz, inogona kupa avhareji yekutapurirana mwero we20 Mbit/s.
Manetiweki eWiMAX anotsigira mhando dzebhizinesi dzine mavara. Data masevhisi emitengo yakasiyana-siyana ndiyo inonyanya kutariswa network.WiMAX inotsigira mazinga akasiyana eQoS, saka iyo network yekuvhara inowirirana zvakanyanya nemhando yebasa. Panyaya yeIPTV kuwana. nekuti IPTV inoda yakakwirira-level QoS vimbiso uye yakakwirira-yekumhanyisa data data rates. saka iyo WiMAX network inomiswa zvine musoro zvichienderana nehuwandu hwevashandisi munzvimbo uye zvavanoda. Kana vashandisi vawana iyo IPTV network. Iko hakuna chikonzero chekuita wiring zvakare, inongoda kuwedzera WiMAX yekugamuchira michina uye IP set-yepamusoro bhokisi, saka vashandisi vanogona kushandisa IPTV sevhisi zviri nyore uye nekukurumidza.
Parizvino, IPTV ibhizinesi riri kusimukira rine mukana mukuru wemusika, uye budiriro yaro ichiri muhudiki. Maitiro ekuvandudza kwayo ramangwana ndeyekuenderera mberi nekubatanidza IPTV masevhisi nematerminal, uye TV ichave yakazara dhijitari imba terminal nekutaurirana uye Internet mabasa. Asi IPTV kuwana budiriro mupfungwa yechokwadi, kwete chete kugadzirisa dambudziko remukati, asi zvakare kugadzirisa bhodhoro rekupedzisira kiromita.
Nguva yekutumira: Zvita-05-2024