Nekuvakwa kweiyo 5G network, iyo 5G base station inodhura zvakanyanya, kunyanya sezvo dambudziko rekushandisa simba rakakura rave richizivikanwa zvakanyanya.
Munyaya yeChina Mobile, kutsigira yakakwira-speed downlink, yayo 2.6GHz radio frequency module inoda 64 channels uye inokwana 320 watts.
Kana iri nharembozha dze5G dzinotaurirana nechiteshi chepasi, nekuti dziri padhuze nemuviri wemunhu, iyo yepasi ye "radiation kukuvadzwa" inofanirwa kuchengetedzwa zvakanyanya, saka simba rekutapurirana rakaganhurwa.
Iyo Protocol inoganhura 4G nharembozha 'yekufambisa simba kusvika pakupfuura 23dBm (0.2w).Kunyangwe simba iri risiri rakakura zvakanyanya, kuwanda kwe4G mainstream bhendi (FDD 1800MHz) kwakadzikira, uye kurasikirwa kwekutapurirana kudiki.Haisi dambudziko kuishandisa.
Asi mamiriro e5G akanyanya kuoma.
Chekutanga pane zvese, iyo mainstream frequency band ye5G ndeye 3.5GHz, yakakwira frequency, yakakura kurasikirwa nzira yekuparadzira, kusakwanisa kupinda mukati, kushaya simba kwenharembozha, uye kushoma kwekufambisa simba;saka, iyo uplink iri nyore kuve iyo system bottleneck.
Chechipiri, 5G Yakavakirwa paTDD modhi, uye iyo uplink uye downlink inotumirwa muchikamu chenguva.Kazhinji, kuve nechokwadi cheiyo downlink simba, iyo yekugovera kune iyo nguva slot's uplink ishoma, ingangoita 30%.Mune mamwe mazwi, foni ye5G muTDD inongova ne30% yenguva yekutumira data, izvo zvinowedzera kuderedza avhareji yemagetsi ekufambisa.
Uyezve, iyo yekuendesa modhi ye5G inochinjika, uye networking yakaoma.
MuNSA mode, 5G uye 4G inotumira data panguva imwe chete pamusoro pekubatana kweviri, kazhinji 5G muTDD mode uye 4G muFDD mode.Neiyi nzira, simba rekufambisa mbozha mbozha rinofanira kunge riri rei?
MuSA modhi, 5G inogona kushandisa TDD kana FDD imwe chete inotakura kutapurirana.Uye unganidza mutakuri weiyi nzira mbiri.Zvakafanana nenyaya yeNSA mode, nharembozha inoda kuendesa data panguva imwe chete pamabhendi maviri akasiyana, uye TDD uye FDD maviri modes;inofanira kufambisa simba rakawanda sei?
Kunze kwezvo, ingani nharembozha inofanirwa kufambisa simba kana iwo maviri TDD vatakuri ve5G vakaunganidzwa?
3GPP yakatsanangura akawanda emagetsi mazinga eiyo terminal.
PaSub 6G spectrum, simba rechitatu ndiro 23dBm;nhanho yesimba 2 ndeye 26dBm, uye yesimba nhanho 1, iyo theoretical simba rakakura, uye parizvino hapana tsananguro.
Nekuda kweiyo yakakwira frequency uye maitiro ekutapurirana akasiyana neSub 6G, mamiriro ekushandisa anonyanya kutariswa mukugadzirisa kuwana kana kusashandisa nharembozha.
Iyo protocol inotsanangura mana emagetsi mazinga emillimeter-wave, uye iyo radiation index yakakura.
Parizvino, kushandiswa kwe5G kwekutengesa kunonyanya kuenderana nenharembozha eMBB sevhisi muSub 6G band.Izvi zvinotevera zvinonyanya kutarisisa pane iyi mamiriro, yakanangana neiyo mainstream 5G frequency mabhendi (seFDD n1, N3, N8, TDD n41, n77, N78, nezvimwewo).Yakakamurwa kuita marudzi matanhatu kutsanangura:
- 5G FDD (SA modhi): iyo yakanyanya kutumira simba idanho 3, iri 23dBm;
- 5G TDD (SA modhi): iyo yakanyanya kutumira simba idanho 2, iri 26dBm;
- 5G FDD + 5G TDD CA (SA mode): simba guru rekutumira ndiro nhanho 3, iyo 23dBm;
- 5G TDD + 5G TDD CA (SA mode): simba guru rekutumira ndiro nhanho 3, iyo 23dBm;
- 4G FDD + 5G TDD DC (NSA mode): simba guru rekutumira ndiro nhanho 3, iyo 23dBm;
- 4G TDD + 5G TDD DC (NSA mode);Iyo yakawanda yekufambisa simba inotsanangurwa neR15 idanho rechitatu, iro riri 23dBm;uye iyo R16 vhezheni inotsigira yakakura kuendesa simba level 2, iri 26dBm
Kubva pamhando nhanhatu dziri pamusoro, tinogona kuona zvinotevera maitiro:
Chero bedzi nhare mbozha ichishanda muFDD modhi, iyo yakanyanya kutumira simba ingori 23dBm, ichiri muTDD modhi, kana isina-yakasununguka networking, 4G uye 5G ese ari maviri TDD modhi, iyo yakanyanya kutumira simba inogona kudzikiswa kusvika ku26dBm.
Saka, nei protocol ichitarisira zvakanyanya nezve TDD?
Sezvatinoziva tese, indasitiri yekufonera yagara iine maonero akasiyana ekuti magetsi emagetsi.Zvakadaro, nekuda kwekuchengetedza, simba rekufambisa renharembozha rinofanira kunge rakaganhurwa.
Parizvino, nyika nemasangano akagadzira akakodzera emagetsi radiation kuratidzwa hutano zviyero, kudzikamisa nharembozha 'mwaranzi kune diki renji.Chero bedzi nharembozha ichienderana nezviyero izvi, inogona kunzi yakachengeteka.
Iyi mipimo yehutano yese inonongedza kuchiratidzo chimwe chete: SAR, iyo inonyanya kushandiswa kuyera mhedzisiro yemwaranzi yepamhepo kubva kunharembozha uye zvimwe zvinotakurika zvekufambisa mashoko.
SAR ndeye chaiyo Absorption Ratio.Inotsanangurwa sekuyera chiyero chinotorwa simba pachiyero cheyuniti nemuviri wemunhu kana yaiswa kune redhiyo frequency (RF) yemagetsi ndima.Inogona zvakare kureva kutorwa kwemamwe marudzi esimba nematishu, kusanganisira ultrasound.Inotsanangurwa sesimba rinotorwa pahuwandu hwematishu uye ine watts units pakirogiramu (W/kg).
Chiyero chenyika yeChina chinoenderana nezviyero zvekuEurope uye chinoti: “avhareji yeSAR kukosha kwechero 10g yebiological kwemaminitsi matanhatu chero ipi zvayo haifaniri kudarika 2.0W/Kg.
Kureva kuti, uye aya mazinga anoongorora avhareji yehuwandu hwemagetsi emagetsi anogadzirwa nenharembozha nekufamba kwenguva.Inobvumira zvishoma zvishoma musimba renguva pfupi, chero bedzi chiyero chepakati chisingapfuuri chiyero.
Kana iyo yakanyanya kutumira simba iri 23dBm muTDD uye FDD modhi, nhare mbozha muFDD modhi iri kuramba ichiendesa simba.Kusiyana neizvi, nharembozha muTDD modhi inongova ne30% yekufambisa simba, saka iyo yakazara TDD yekuburitsa simba ingangoita 5dB pasi peFDD.
Naizvozvo, kutsiva iyo TDD modhi yekufambisa simba ne3dB, iri panzvimbo yeSAR standard kugadzirisa mutsauko uripo pakati peTDD neFDD, uye inogona kusvika 23dBm paavhareji.
Nguva yekutumira: Chivabvu-03-2021