Pre 5G radio resources

5G grid, radio frame
ASN1 messages
BS
Base Station
MS
Mobile Station
NDLsymb
Number of OFDM symbols in a downlink slot (=7)
NRBsc
Resource block size in the frequency domain, expressed as a number of subcarriers (=12)
NDLRB
Downlink bandwidth configuration, expressed in multiples of NscRB (=100)
PRB
Physical Resource Block
SC
Sub Carrier
CA
Carrier Aggregation

Physical channels 5G.211

Verizon 5G Technical Forum VZ 5G TF
Korean Telecom 5G Special Interest Group KT 5G SIG

Radio frame \ Technology LTE 5G TF
Subcarrier spacing (KHz) 15 75
Basic time unit Ts 1 / (15000 x 2048) seconds 1 / (75000 x 2048) seconds
Slot Tslot
TTI
15360 x Ts = 0.5 ms
1 ms
15360 x Ts = 0.1 ms
0.2 ms
Radio frame duration Tf (150 x 2048) x Ts = 307200 x Ts = 10 ms (750 x 2048) x Ts = 1536000 x Ts = 10 ms
Maximum serving cells (CA) 5 8
Maximum aggregated bandwidth 5 x 20 = 100 MHz 8 x 100 = 800 MHz
Formula Maximum symbols / second NDLsymb . NRBsc . NDLRB . slots/frame . frames/sec . nb carriers
Maximum symbols / second 7 x 12 x 100 x 20 x 100 x 5 = 84M 7 x 12 x 100 x 100 x 100 x 8 = 672M
Maximum theorical throughput
MIMO 2 layers, 64 QAM (6 bits/symbol)
84M x 2 x 6
1.01 Gbits/s
672M x 2 x 6
8.06 Gbits/s
Reserved symbols / second First SF symbol : 1/14 = 7.1%
Cell RS (2 antennas) : 12/(13*12) = 7.7%
SF 0 & 25 : 2/50 = 4%
PDCCH symbol : 1/14*(48/50)*(96/100) = 6.6%
PDSCH DM-RS : 1/14*(48/50) = 6.9%

Uplink

Physical channels

xPRACH
Physical Random Access Channel
xPUCCH
Physical Uplink Control Channel
xPUSCH
Physical Uplink Shared Channel

Reference signals

PUCCH-RS
Demodulation reference signal, associated with transmission of xPUCCH
PUSCH-RS
Demodulation reference signal, associated with transmission of xPUSCH
SRS
Sounding reference signal, not associated with transmission of xPUSCH or xPUCCH
PCRS
Phase noise compensation reference signal, associated with transmission of xPUSCH

Downlink

Physical channels

xPBCH
Physical Broadcast Channel
ePBCH
Extended physical broadcast channel
xPDCCH
Physical Downlink Control Channel
xPDSCH
Physical Downlink Shared Channel

Reference signals

PSS
Primary synchronization signal
SSS
Secondary synchronization signal
ESS
Extended synchronization signal
PDSCH-RS
UE-specific Reference Signal (DM-RS) associated with xPDSCH
PDCCH-RS
UE-specific Reference Signal (DM-RS) associated with xPDCCH
CSI-RS
CSI Reference Signal
BRS
Beam measurement Reference Signal
BRRS
Beam Refinement Reference Signal
PCRS
Phase noise compensation reference signal, associated with transmission of xPDSCH
PBCH-RS
Reference Signal (DM-RS) associated with ePBCH

TDD radio frame : 100 MHz, 10 ms

The image below only shows half a frame (5ms), from suframe 0 to 24. Suframes 25 to 49 are identical to suframes 0 to 24
Downlink synchronization signals PSS, SSS, ESS, Broadcast channels and BRS are transmitted in subframes 0 and 25
N Symb, xPDCCH = 1

5G frame

PSS provides NID(2) in the range of 0 to 2
SSS provides NID(1) in the range of 0 to 167
Physical-layer cell identity NIDcell = 3 x NID(1) + NID(2)
ESS identifies the OFDM symbol index in the range of 0 to 13