Ubalo lwe-5G yokuKhuphela iNqanaba eliyiNcopho

1. Iingcamango ezisisiseko

Ngokusekelwe kwitekhnoloji yokuqala ye-LTE (Ixesha elide lokuziphendukela kwemvelo), inkqubo ye-5G NR ithatha iteknoloji entsha kunye nezakhiwo.I-5G NR ayizuzi kuphela i-OFDMA (i-Orthogonal Frequency-Division Multiple Access) kunye ne-FC-FDMA ye-LTE kodwa izuza i-teknoloji ye-antenna eninzi ye-LTE.Ukuhamba kwe-MIMO kungaphezulu kwe-LTE.Kwimodyuli, i-MIMO ixhasa ukhetho oluguquguqukayo lwe-QPSK (i-Orthogonal Frequency-Division Multiple Access), i-16QAM (i-16 yenqanaba le-quadrature amplitude ye-aplitude ye-multi-level), i-64QAM (i-64 ye-quadrature ye-quadrature amplitude ye-multi-level), kunye ne-256 QAM (i-256 ye-quadrature amplitude multi-level ukumodareyitha).

Inkqubo ye-NR, njenge-LTE, inokwaba ngokuguquguqukayo ixesha kunye ne-frequency kwi-bandwidth ngokusebenzisa ulwahlulo lokuphindaphinda kunye nokwahlula-hlula ixesha lokuphindaphinda.Kodwa ngokungafaniyo ne-LTE, i-NR ixhasa ukuguquguquka kwe-sub-carrier ububanzi, njenge-15/30/60/120/240KHz.Obona bubanzi bomthuthi bamandla buphezulu kune-LTE, njengoko kubonisiwe kulo mfanekiso ungezantsi:

Ukubalwa kwethiyori yexabiso lencopho ye-NR ihambelana ne-bandwidth, imodi yokumodareyitha, imo ye-MIMO, kunye neeparitha ezithile.

Okulandelayo yimephu yesixhobo sokuphindaphinda kwexesha

Igrafu engentla yimephu yovimba wexesha ebonakala kwiidatha ezininzi ze-LTE.Kwaye makhe sithethe ngokufutshane malunga nokubalwa kwe-5G yepeak rate yokubala nayo.

2. ukubalwa kwe-NR downlink peak rate

Izixhobo ezifumanekayo kwi-frequency domain

Kwi-5G NR, iyunithi yokucwangcisa eyisiseko ye-PRB yeshaneli yedatha ichazwa njenge-12 sub-carriers (eyahlukileyo kwi-LTE).Ngokwe-protocol ye-3GPP, i-100MHz i-bandwidth (i-30KHz i-sub-carrier) ine-273 ekhoyo ye-PRBs, oko kuthetha ukuba i-NR ine-273 * 12 = 3276 i-sub-carriers kwi-frequency domain.

Izixhobo ezifumanekayo kwindawo yexesha

Ubude bexesha slot iyafana LTE, nangoku 0.5ms, kodwa ngexesha slot ngalinye, kukho 14 iisimboli OFDMA, kuthathelwa ingqalelo ukuba ezinye izixhobo kufuneka isetyenziswe ukuthumela umqondiso okanye ezinye izinto, kukho ngeenxa 11 iisimboli ukuba. ingasetyenziselwa ukuhanjiswa, oku kuthetha ukuba malunga ne-11 ye-14 sub-carriers ye-frequency efanayo edluliselwe ngaphakathi kwe-0.5ms isetyenziselwa ukuhambisa idatha.

Ngeli xesha, i-100MHz i-bandwidth (30KHz subcarrier) kwi-0.5ms yokuhanjiswa yi-3726 * 11 = 36036

Ubume besakhelo (2.5ms umjikelo ophindwe kabini ngezantsi)

Xa isakhiwo sesakhelo siqulunqwe kunye nomjikelezo ophindwe kabini we-2.5ms, umlinganiselo okhethekileyo we-subframe time slot ngu-10: 2: 2, kwaye kukho (5 + 2 * 10/14) i-downlink slots ngaphakathi kwe-5ms, ngoko ke inani le-downlink slots nge-millisecond nganye. malunga ne-1.2857.I-1s=1000ms, ngoko ke i-1285.7 i-downlink time slot inokucwangciswa ngaphakathi kwe-1s.ngeli xesha, inani le-subcarriers ezisetyenziselwa ukucwangcisa i-downlink yi-36036 * 1285.7

Umsebenzisi omnye uMIMO 2T4R kunye ne-4T8R

Ngokusebenzisa iteknoloji ye-antenna eninzi, abasebenzisi bomqondiso banokuxhasa ukuhanjiswa kwedatha eninzi ngexesha elinye.Inani eliphezulu lemijelo yedatha ye-downlink kunye ne-uplink yomsebenzisi omnye ixhomekeke kwinani elincinci lesiseko sokwamkela iileya ze-base station kunye ne-UE zifumana iileya, zinyanzeliswa yinkcazo yeprotocol.

Kwi-64T64R yesikhululo sesiseko, i-2T4R UE inokuxhasa ukuya kwi-4 yokuhanjiswa kwedatha ngexesha elinye.

Inguqulo yeprotocol ye-R15 yangoku ixhasa ubuninzi beeleya ezi-8;oko kukuthi, inani eliphezulu leeleya ze-SU-MIMO ezixhaswayo kwicala lomnatha yi-8 layers.

Ukumodareyitha okuphezulu kwe-256 QAM

I-subcarrier enye inokuthwala iibhithi ezisi-8.

Ukushwankathela, ubalo olurhabaxa lomyinge wencopho yethiyori ye-downlink:

Umsebenzisi omnye: MIMO2T4R

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

Umsebenzisi omnye: MIMO4T8R

273*12*11*1.2857*1000*8*8≈2.97Gb/s