Menene bambanci tsakanin tsarin tashar 5G da 4G
1. RRU da eriya an haɗa su (an riga an gane)
5G yana amfani da fasahar MIMO ta Massive (duba 5G Basic Knowledge Course for Busy People (6)-Massive MIMO: Babban Kisan 5G da 5G Basic Knowledge Course for Busy People (8) -NSA ko SA? Wannan tambaya ce da yakamata ayi tunani akai. ), eriyar da aka yi amfani da ita tana da raka'o'in transceiver masu zaman kansu har zuwa 64.
Tunda da gaske babu wata hanya ta saka masu ciyarwa 64 a ƙarƙashin eriya kuma a rataye a kan sandar, masana'antun kayan aikin 5G sun haɗa RRU da eriya zuwa na'urar guda ɗaya-AAU (Rashin Antenna Active).
Kamar yadda kake gani daga sunan, na farko A cikin AAU yana nufin RRU (RRU yana aiki kuma yana buƙatar samar da wutar lantarki don aiki, yayin da eriya ba ta da ƙarfi kuma ana iya amfani da ita ba tare da wutar lantarki ba), kuma na ƙarshe AU yana nufin eriya.
Bayyanar AAU yayi kama da eriya ta gargajiya.Tsakanin hoton da ke sama shine 5G AAU, kuma hagu da dama sune eriyar gargajiya ta 4G.Koyaya, idan kun tarwatsa AAU:
Kuna iya ganin raka'o'in transceiver masu zaman kansu cike da ɗimbin yawa a ciki, ba shakka, jimillar lambar ita ce 64.
An inganta fasahar watsa fiber na gani tsakanin BBU da RRU (AAU) (an riga an gane)
A cikin cibiyoyin sadarwa na 4G, BBU da RRU suna buƙatar amfani da fiber na gani don haɗawa, kuma mitar watsa siginar mitar rediyo a cikin fiber na gani ana kiranta CPRI (Common Public Radio Interface).
CPRI tana watsa bayanan mai amfani tsakanin BBU da RRU a cikin 4G kuma babu wani laifi a ciki.Duk da haka, a cikin 5G, saboda amfani da fasaha irin su Massive MIMO, ƙarfin 5G guda tantanin halitta zai iya kaiwa fiye da sau 10 na 4G, wanda yayi daidai da BBU da AAU.Adadin bayanan watsawa dole ne ya kai fiye da sau 10 na 4G.
Idan ka ci gaba da amfani da fasahar CPRI na gargajiya, bandwidth na fiber na gani da na'urar gani za ta karu da sau N, kuma farashin fiber na gani da na'urar gani zai karu sau da yawa.Don haka, don adana farashi, masu siyar da kayan aikin sadarwa sun haɓaka ƙa'idar CPRI zuwa eCPRI.Wannan haɓakawa abu ne mai sauƙi.A zahiri, kumburin watsawa na CPRI yana motsa shi daga asalin ƙirar jiki na asali da mitar rediyo zuwa Layer na zahiri, kuma Layer na zahiri na gargajiya ya kasu kashi babban matakin jiki da ƙaramin matakin jiki.
3. Rarraba BBU: rabuwar CU da DU (ba zai yiwu ba na ɗan lokaci)
A cikin zamanin 4G, tashar tashar BBU tana da ayyukan sarrafa jiragen sama guda biyu (yafi akan babban allon kulawa) da kuma ayyukan jirgin sama mai amfani (babban kula da allo na baseband).Akwai matsala:
Kowace tashar tushe tana sarrafa nata watsa bayanai kuma tana aiwatar da nata algorithms.Babu m babu daidaituwa da juna.Idan aikin sarrafawa, wato, aikin kwakwalwa, za a iya fitar da shi, ana iya sarrafa tashoshi masu yawa a lokaci guda don cimma daidaituwar watsawa da tsangwama.Haɗin kai, shin ingancin watsa bayanan zai kasance mafi girma?
A cikin hanyar sadarwa ta 5G, muna so mu cimma burin da ke sama ta hanyar rarraba BBU, kuma aikin sarrafawa na tsakiya shine CU (Centralized Unit), kuma tashar tushe tare da aikin sarrafawa da aka raba kawai an bar shi don sarrafa bayanai da watsawa.Aikin ya zama DU (Rarraba Rarraba), don haka tsarin tashar 5G ya zama:
A ƙarƙashin gine-ginen da aka raba CU da DU, an daidaita hanyar sadarwar watsawa daidai.An motsa ɓangaren gaba tsakanin DU da AAU, kuma an ƙara cibiyar sadarwa ta midhaul tsakanin CU da DU.
Koyaya, manufa ta cika sosai, kuma gaskiyar tana da fata sosai.Rabuwar CU da DU sun haɗa da abubuwa kamar tallafin sarkar masana'antu, sake gina ɗakin kwamfuta, sayayyar ma'aikata, da sauransu. Ba za a samu na ɗan lokaci ba.5G BBU na yanzu haka yana nan, kuma bashi da alaka da 4G BBU.
Lokacin aikawa: Afrilu-01-2021