Kodi pali kusiyana kotani pakati pa 5G base station system ndi 4G
1. RRU ndi mlongoti zikuphatikizidwa (zazindikirika kale)
5G imagwiritsa ntchito ukadaulo wa Massive MIMO (onani 5G Basic Knowledge Course for Busy People (6) -Massive MIMO: The Real Big Killer of 5G and 5G Basic Knowledge Course for Busy People (8)-NSA kapena SA? Ili ndi funso loyenera kuliganizira? ), mlongoti wogwiritsidwa ntchito uli ndi ma transceiver odziyimira pawokha mpaka 64.
Popeza palibe njira yolowera ma feeder 64 pansi pa mlongoti ndikupachikika pamtengo, opanga zida za 5G aphatikiza RRU ndi mlongoti kukhala chipangizo chimodzi-AAU (Active Antenna Unit).
Monga mukuwonera kuchokera ku dzinali, woyamba A mu AAU amatanthauza RRU (RRU ikugwira ntchito ndipo imafunikira magetsi kuti igwire ntchito, pomwe mlongoti umakhala wopanda mphamvu ndipo ungagwiritsidwe ntchito popanda magetsi), ndipo AU yomaliza imatanthawuza mlongoti.
Maonekedwe a AAU amawoneka ngati mlongoti wachikhalidwe.Pakati pa chithunzi pamwambapa ndi 5G AAU, ndipo kumanzere ndi kumanja ndi tinyanga tachikhalidwe cha 4G.Komabe, ngati mutasokoneza AAU:
Mutha kuwona ma transceiver odzaza odziyimira pawokha mkati, inde, chiwerengero chonse ndi 64.
Ukadaulo wotumizira ma fiber optical pakati pa BBU ndi RRU (AAU) wakwezedwa (wazindikirika kale)
Mu maukonde a 4G, BBU ndi RRU ayenera kugwiritsa ntchito kuwala kwa fiber kuti agwirizane, ndipo mulingo wotumizira ma radio frequency mu fiber fiber umatchedwa CPRI (Common Public Radio Interface).
CPRI imatumiza deta ya ogwiritsa ntchito pakati pa BBU ndi RRU mu 4G ndipo palibe cholakwika ndi izo.Komabe, mu 5G, chifukwa chogwiritsa ntchito matekinoloje monga Massive MIMO, mphamvu ya selo imodzi ya 5G imatha kufika nthawi zoposa 10 kuposa 4G, yomwe ndi yofanana ndi BBU ndi AAU.Kuchuluka kwa data ya inter-transmission kuyenera kufika nthawi zoposa 10 kuposa 4G.
Ngati mukupitiriza kugwiritsa ntchito luso lamakono la CPRI, bandwidth ya optical fiber ndi optical module idzawonjezeka ndi nthawi za N, ndipo mtengo wa optical fiber ndi optical module udzawonjezeka kangapo.Choncho, pofuna kupulumutsa ndalama, ogulitsa zida zoyankhulirana adakweza ndondomeko ya CPRI ku eCPRI.Kukweza uku ndikosavuta.Ndipotu, ndondomeko ya CPRI yopatsirana imasunthidwa kuchokera kumalo oyambirira a thupi ndi maulendo a wailesi kupita kumalo a thupi, ndipo Chikhalidwe cha chikhalidwe cha thupi chimagawidwa kukhala chapamwamba kwambiri komanso chochepa cha thupi.
3. Kugawanika kwa BBU: kulekanitsa CU ndi DU (sizingatheke kwa kanthawi)
M'nthawi ya 4G, malo oyambira BBU ali ndi ntchito zowongolera ndege (makamaka pa bolodi lalikulu) ndi ntchito zandege za ogwiritsa ntchito (bodi lalikulu lowongolera ndi bolodi la baseband).Pali vuto:
Malo aliwonse oyambira amawongolera kutumizira kwa data yake ndikugwiritsa ntchito ma aligorivimu ake.Kwenikweni palibe mgwirizano wina ndi mzake.Ngati ntchito yolamulira, ndiko kuti, ntchito ya ubongo, ikhoza kuchotsedwa, malo angapo oyambira amatha kuwongoleredwa nthawi imodzi kuti akwaniritse kufalikira kogwirizana ndi kusokoneza.Kugwirizana, kodi mphamvu yotumizira deta idzakhala yapamwamba kwambiri?
Mu intaneti ya 5G, tikufuna kukwaniritsa zolinga zomwe zili pamwambazi pogawaniza BBU, ndipo ntchito yolamulira pakati ndi CU (Centralized Unit), ndipo malo oyambira omwe ali ndi ntchito yosiyana siyana amangotsala kuti athetse deta ndi kutumiza.Ntchitoyi imakhala DU (Distributed Unit), kotero 5G base station system imakhala:
Pansi pa zomangamanga pomwe CU ndi DU zimasiyanitsidwa, maukonde opatsirana adasinthidwanso moyenera.Gawo lakutsogolo lasunthidwa pakati pa DU ndi AAU, ndipo netiweki ya midhaul yawonjezedwa pakati pa CU ndi DU.
Komabe, zoyenera ndizodzaza kwambiri, ndipo zenizeni ndizochepa thupi.Kupatukana kwa CU ndi DU kumaphatikizapo zinthu monga chithandizo cha unyolo wa mafakitale, kumanganso chipinda cha makompyuta, kugula kwa oyendetsa, ndi zina zotero. Sizidzadziwika kwa kanthawi.5G BBU yapano ikadali chonchi, ndipo ilibe chochita ndi 4G BBU.
Nthawi yotumiza: Apr-01-2021