Yintoni umahluko phakathi kwenkqubo yesikhululo se-5G kunye ne-4G
1. I-RRU kunye ne-antenna zidityanisiwe (sele ziqatshelwe)
I-5G isebenzisa iteknoloji ye-Massive MIMO (jonga i-5G Basic Knowledge Course for Busy People (6)-Massive MIMO: I-Real Big Killer ye-5G kunye ne-5G Basic Knowledge Course for Busy People (8)-NSA okanye i-SA? Lo ngumbuzo ofanele ucingisiswe ngawo), i-antenna esetyenzisiweyo ineeyunithi ze-transceiver ezizimeleyo ezakhelwe ngaphakathi ukuya kuthi ga kwi-64.
Ekubeni kungekho ndlela yokufaka ii-feeders ezingama-64 phantsi kwe-antenna uze uxhome epalini, abavelisi bezixhobo ze-5G badibanise i-RRU kunye ne-antenna kwisixhobo esinye-i-AAU (iYunithi ye-Active Antenna).
Njengoko unokubona kweli gama, u-A wokuqala kwi-AAU uthetha i-RRU (i-RRU iyasebenza kwaye ifuna umbane ukuze isebenze, ngelixa i-antenna ingasebenzi kwaye ingasetyenziswa ngaphandle kombane), kwaye u-A wokugqibela uthetha i-antenna.
Inkangeleko ye-AAU ifana nje ne-antenna yendabuko. Umbindi womfanekiso ongasentla yi-5G AAU, kwaye ekhohlo nasekunene zii-antenna zemveli ze-4G. Nangona kunjalo, ukuba uyayichitha i-AAU:
Ungazibona iiyunithi ze-transceiver ezizimeleyo ezigcweleyo ngaphakathi, ewe, inani lilonke lingama-64.
Itekhnoloji yokudlulisa i-optical fiber phakathi kwe-BBU kunye ne-RRU (AAU) iphuculwe (sele iqatshelwe)
Kwiinethiwekhi ze-4G, i-BBU kunye ne-RRU kufuneka zisebenzise i-optical fiber ukuze ziqhagamshelane, kwaye umgangatho wokudluliselwa kwesignali yerediyo kwi-optical fiber ubizwa ngokuba yi-CPRI (Common Public Radio Interface).
I-CPRI idlulisela idatha yomsebenzisi phakathi kwe-BBU kunye ne-RRU kwi-4G kwaye akukho nto imbi ngayo. Nangona kunjalo, kwi-5G, ngenxa yokusetyenziswa kwezobuchwepheshe ezifana ne-Massive MIMO, amandla eseli enye ye-5G ngokusisiseko anokufikelela ngaphezulu kwezihlandlo ezili-10 kune-4G, nto leyo elingana ne-BBU kunye ne-AAU. Izinga ledatha yokudluliselwa phakathi kufuneka lifikelele ngaphezu kwezihlandlo ezili-10 kune-4G.
Ukuba uqhubeka nokusebenzisa itekhnoloji yendabuko yeCPRI, ububanzi be-bandwidth ye-optical fiber kunye ne-optical module buya kunyuka ngamaxesha e-N, kwaye ixabiso le-optical fiber kunye ne-optical module nalo liya kunyuka amaxesha amaninzi. Ke ngoko, ukuze kongiwe iindleko, abathengisi bezixhobo zonxibelelwano baphucule iprotocol yeCPRI ukuya kwi-eCPRI. Olu phuculo lulula kakhulu. Enyanisweni, i-CPRI transmission node isuswa kwi-physical layer yokuqala kunye ne-radio frequency ukuya kwi-physical layer, kwaye i-physical layer yendabuko yahlulwe yaba yi-physical layer ephezulu kunye ne-physical layer ephantsi.
3. Ukwahlulwa kwe-BBU: ukwahlulwa kwe-CU kunye ne-DU (akunakwenzeka okwethutyana)
Kwixesha le-4G, isikhululo se-BBU esisezantsi sinemisebenzi yeplani yokulawula (ikakhulu kwibhodi yokulawula ephambili) kunye nemisebenzi yeplani yomsebenzisi (ibhodi yokulawula ephambili kunye nebhodi ye-baseband). Kukho ingxaki:
Isikhululo ngasinye silawula ukuhanjiswa kwedatha yaso kwaye sisebenzisa ii-algorithms zaso. Akukho ntsebenziswano phakathi kwaso. Ukuba umsebenzi wolawulo, oko kukuthi, umsebenzi wobuchopho, unokususwa, izikhululo ezininzi zesiseko zinokulawulwa ngaxeshanye ukuze kufezekiswe ukuhanjiswa kunye nokuphazamiseka okudibeneyo. Intsebenziswano, ngaba ukusebenza kakuhle kokudluliselwa kwedatha kuya kuba phezulu kakhulu?
Kwinethiwekhi ye-5G, sifuna ukufezekisa ezi njongo zingasentla ngokwahlulahlula i-BBU, kwaye umsebenzi wolawulo oluphakathi yi-CU (iYunithi ePhakathi), kwaye isikhululo esisisiseko esinomsebenzi wolawulo oluhlukeneyo sishiyelwa kuphela ukucubungula nokudlulisa idatha. Umsebenzi uba yi-DU (iYunithi eSasazwayo), ngoko ke inkqubo yesikhululo esisisiseko se-5G iba:
Phantsi koyilo apho i-CU kunye ne-DU zahlulwe khona, inethiwekhi yothumelo nayo ilungisiwe ngokufanelekileyo. Inxalenye yothutho olungaphambili ifudusiwe phakathi kwe-DU kunye ne-AAU, kwaye inethiwekhi ye-midhaul yongezwe phakathi kwe-CU kunye ne-DU.
Nangona kunjalo, eyona nto ifanelekileyo igcwele kakhulu, kwaye inyani ayicacanga. Ukwahlulwahlulwa kwe-CU kunye ne-DU kubandakanya izinto ezifana nenkxaso yecandelo lemizi-mveliso, ukwakhiwa kwakhona kwamagumbi eekhompyutha, ukuthengwa kwabaqhubi, njl. Akuyi kufezekiswa okwethutyana. I-5G BBU yangoku isenje, kwaye ayinanto yakwenza ne-4G BBU.
Ixesha lokuthumela: Epreli-01-2021