Ole fa'atatau ole 5G Download Peak Rate

1. manatu faavae

Faʻavae i luga o le uluai tekonolosi a le LTE (Long Term Evolution), o le 5G NR system e faʻaaogaina nisi tekinolosi fou ma fausaga.5G NR e le gata o le mauaina o le OFDMA (Orthogonal Frequency-Division Multiple Access) ma le FC-FDMA o le LTE ae maua ai le tele-antenna tekinolosi a le LTE.Ole tafe ole MIMO e sili atu nai lo le LTE.I le fa'aogaina, e lagolagoina e le MIMO le filifilia o le QPSK (Orthogonal Frequency-Division Multiple Access), 16QAM (16 multi-level quadrature amplitude modulation), 64QAM (64 multi-level quadrature amplitude modulation), ma le 256 QAM (256 multi-level quadrature amplitude. modulation).

O le NR system, e pei o le LTE, e mafai ona fetu'una'i le fa'asoaina o le taimi ma le taimi i le bandwidth e ala i le tele o vaevaega o taimi ma le tele o taimi-vaega.Ae e le pei o le LTE, o le NR e lagolagoina le fesuisuiai-sub-carrier lautele, pei ole 15/30/60/120/240KHz.O le maualuga o le bandwidth avefeau lagolago e maualuga atu nai lo le LTE, e pei ona faʻaalia i le ata o loʻo i lalo:

Ole fua fa'atatau ole tau maualuga ole NR e feso'ota'i ma le bandwidth, mode modulation, MIMO mode, ma ta'iala fa'apitoa.

O lo'o mulimuli mai le fa'afanua o puna'oa ta'i taimi

O le kalafi o loʻo i luga o le faʻafanua o punaoa taimi-taimi o loʻo faʻaalia i le tele o faʻamaumauga LTE.Ma seʻi o tatou talanoa puupuu e uiga i le faʻatusatusaina o le 5G maualuga fua faʻatatau faʻatatau ma ia.

2. le fa'atatauga ole NR downlink peak rate

O lo'o maua punaoa i totonu ole vaega ole alaleo

I le 5G NR, o le iunite faʻatulagaina PRB o le alalaupapa faʻamatalaga o loʻo faʻamatalaina o le 12 sub-carriers (e ese mai le LTE).E tusa ai ma le 3GPP protocol, 100MHz bandwidth (30KHz sub-carrier) e 273 avanoa PRBs, o lona uiga o le NR o loʻo i ai le 273 * 12 = 3276 sub-carriers i le faʻasologa masani.

Punaoa maua i le vaega taimi

Ole umi ole taimi ole taimi e tutusa ma le LTE, e 0.5ms pea, ae i taimi taʻitasi, e 14 faʻailoga OFDMA, mafaufau e manaʻomia le faʻaogaina o nisi punaoa e lafo ai se faailo poʻo nisi mea, e tusa ma le 11 faʻailoga e e mafai ona fa'aoga mo felauaiga, o lona uiga e tusa ma le 11 o le 14 sub-carriers o le tutusa taimi fa'asalalauina i totonu ole 0.5ms o lo'o fa'aaogaina e fa'asalalau fa'amaumauga.

I le taimi nei, 100MHz bandwidth (30KHz subcarrier) i le 0.5ms felauaiga o le 3726*11=36036

Fua fa'avaa (2.5ms ta'amilosaga ta'ilua i lalo)

A fa'apipi'i fa'avaa fa'avaa i se ta'amilosaga fa'alua e 2.5ms, o le fa'avasegaga ole taimi ole taimi ole va'aiga fa'apitoa ole 10:2:2, ma o lo'o i ai (5+2*10/14) fa'amau i lalo i totonu ole 5ms, e fa'apea le aofa'i o fa'amaulalo avanoa ile millisecond. e tusa ma le 1.2857.1s=1000ms, o lea 1285.7 downlink taimi avanoa e mafai ona faatulagaina i totonu ole 1s.i le taimi nei, o le numera o subcarriers o loʻo faʻaaogaina mo le faʻatulagaina o lalo ole 36036*1285.7

Fa'aoga nofofua MIMO 2T4R ma le 4T8R

E ala i le tele-antenna technology, e mafai e tagata fa'ailoga ona lagolagoina le tele-stream data transmission i le taimi e tasi.Ole maualuga ole numera ole downlink ma le uplink data streams mo se tasi e fa'aoga e fa'alagolago ile la'ititi la'ititi ole nofoaga autu e talia ai ma le UE e maua ai fa'asologa, fa'atapula'aina e le fa'amalamalamaga o le protocol.

I le 64T64R o le nofoaga autu, e mafai e le 2T4R UE ona lagolagoina e oʻo atu i le 4 faʻasalalauga faʻamaumauga i le taimi e tasi.

O le R15 protocol version o lo'o iai nei e lagolagoina le maualuga ole 8 layers;o lona uiga, o le numera aupito maualuga o le SU-MIMO layers lagolagoina i luga o le itu fesoʻotaʻiga e 8 layers.

Fa'atonuga maualuga 256 QAM

E tasi le subcarrier e mafai ona ave 8 bits.

I se aotelega, o se faʻatusatusaga faigata o le maualuga o le fua o le downlink theory:

Fa'aoga nofofua: MIMO2T4R

273*12*11*1.2857*1000*4*8=1.482607526.4bit≈1.48Gb/s

Tagata fa'aoga tasi: MIMO4T8R

273*12*11*1.2857*1000*8*8≈2.97Gb/s