Chii chinonzi base station
Mumakore achangopfuura, nhau dzakadai dzagara dzichibuda nguva nenguva:
Varidzi vedzimba vakapikisa kuvakwa kwenzvimbo dzepasi uye vakacheka tambo dzemagetsi vari vega, uye vashandi vakuru vatatu vakashanda pamwe chete kuputsa nzvimbo dzese dzepasi mupaki.
Kunyangwe kune vagariwo zvavo, nhasi uno, kana Indaneti yenharembozha yapinda muzvikamu zvese zvehupenyu, vanenge vaine njere dzakajairika: masaini efoni anoburitswa nezviteshi zvenharembozha. Saka chiteshi chenharembozha chinotaridzika sei?
Sisitimu yakakwana yechiteshi chepasi inoumbwa neBBU, RRU uye sisitimu yekudyisa antenna (antenna).
Pakati pavo, BBU (Base band Unite, baseband processing unit) ndiyo michina inonyanya kushandiswa pabase station. Inowanzoiswa mukamuri remakombiyuta rakavanzika uye harigone kuonekwa nevanhuwo zvavo. BBU ine basa rekugadzirisa masaini nedata recore network nevashandisi. Maitiro akaomarara uye maalgorithms mukutaurirana kwefoni zvese zvinoshandiswa muBBU. Zvinogona kutotaurwa kuti base station ndiyo BBU.
Kubva pakuonekwa, BBU yakafanana zvikuru nebhokisi guru rekombuta yedesktop, asi kutaura chokwadi, BBU yakafanana neseva yakatsaurirwa (kwete semubati wekombuta wekushandisa zvinhu zvakawanda). Mabasa ayo makuru anoitwa nemhando mbiri. Mabhodhi ekiyi anoitwa nebhodhi guru rekudzora uye bhodhi rebaseband.
Mufananidzo uri pamusoro apa ifuremu yeBBU. Zvinoonekwa zvakajeka kuti kune nzvimbo 8 dzakaita sedhirowa mufuremu yeBBU, uye bhodhi guru rekudzora nebhodhi rebaseband zvinogona kuiswa munzvimbo idzi, uye furemu yeBBU. Mabhodhi makuru ekudzora akawanda uye mabhodhi ebaseband anofanira kuiswa, kunyanya zvichienderana nezvinodiwa zvenzvimbo yekuvhura. Mabhodhi akawanda paanoiswa, simba renzvimbo yekumisa rinowanda, uye vashandisi vakawanda vanogona kushumirwa panguva imwe chete.
Bhodhi guru rekudzora rine basa rekugadzirisa signaling (RRC signaling) kubva kune core network nefoni yemushandisi, rine basa rekubatanidza nekubatanidza ne core network, uye rine basa rekugamuchira ruzivo rweGPS synchronization neruzivo rwekuisa nzvimbo.
RRU (Remote Radio Unit) pakutanga yakaiswa muBBU frame. Yaimbonzi RFU (Radio Frequency Unit). Inoshandiswa kushandura baseband signal inotumirwa kubva kubaseband board kuburikidza neoptical fiber kuita frequency band yemushandi. High-frequency signal inotumirwa kuantenna kuburikidza nefeeder. Gare gare, nekuda kwekuti feeder transmission loss yakaonekwa kuti yakanyanya kukura, kana RFU yakaiswa muBBU frame ndokuiswa muchina, uye antenna yakaturikwa pa remote tower, daro re feeder transmission rakanyanya kure uye kurasikirwa kwakakura, saka ingobvisa RFU. Shandisa optical fiber (optical fiber transmission loss idiki) kuti urembedze pashongwe pamwe chete neantenna, saka inova RRU, inova remote radio unit.
Chekupedzisira, antenna inonyatsoonekwa nemunhu wese mumigwagwa nemumigwagwa yeguta iantenna inotumira chiratidzo chewaya isina waya. Kana ma transceiver akazvimiririra akavakirwa mukati eLTE kana 5G antenna, data streams inogona kutumirwa panguva imwe chete yakawanda, uye mwero wekutumira data uri mukuru.
Kune maantenna e4G, mayuniti etransceiver akazvimirira anosvika masere anogona kuwanikwa, saka pane mainterface masere pakati peRRU neantenna. Mainterface masere ari pasi pe8-channel RRU anogona kuonekwa zvakajeka mumufananidzo uri pamusoro, nepo mufananidzo uri pazasi uchiratidza kuti iantenna ine mainterface masere.
Ma interface masere ari paRRU anofanira kubatanidzwa kune ma interface masere ari paantenna kuburikidza nema feeders masere, saka waya nhema dzinogona kuonekwa kakawanda padanda reantenna.
Nguva yekutumira: Kubvumbi-01-2021