Applicable Versions
NetSim StandardNetSim Pro


Applicable Releases
v12.2v13

The link rate adapts based on the SNR. 


From SNR, Eb / N0  is got by converting the logarithmic decibel scale SNR to a linear power scale and normalizing it. 


Then Efficiency = log2(1 + Eb/N0), where Eb/No is signal over noise.


Then a table is looked up to get CQI from efficiency.  These are the tables referenced in 5.2.1.1. Based on the CQI index the equivalent modulation and code rate are decided. 


And then based on MCS. the number of information bits is got from the Transport Block Size Determination calculations in standard 38.214 - 5.1.3.2.


For additional understanding open the 5G technology library manual


 
and see example 4.3. A user would get an idea of how MCS is chosen by looking at the results table of that example.


In v13.0


FR1 - Variation of path loss, SNR, Efficiency, CQI, Modulation, code rates, and throughput as the distance of the UE from the gNB is increased:


Distance(m)

Pathloss (dB)

SNR (dB)

Downlink Efficiency (dB)

CQI Index

Modulation

Code Rate R*[1024] (CQI)

Code Rate R*[1024] 

(MCS)

Throughput (Mbps)

100

97.3437.4612.441564QAM948772505.23

200

109.0525.748.551564QAM
948772505.23

300

115.9318.866.281564QAM
948772505.23

400

120.8013.984.701364QAM
772772453.74

500

124.5910.203.521164QAM
567567293.00

600

127.687.112.61916QAM616616185.89

700

130.304.491.93816QAM490490131.40

800

132.562.221.416QPSK60260280.67

900

134.560.221.035QPSK44944952.06

1000

136.35-1.550.764QPSK30830836.68

FR 2 - Variation of path loss, SNR, Efficiency, CQI, Modulation, code rates, and throughput as the distance of the UE from the gNB is increased:


Distance(m)

Pathloss (dB)

SNR (dB)

Downlink Efficiency (dB)

CQI Index

Modulation

Code Rate R*[1024]

(CQI)

Code Rate R*[1024] 

(MCS)

Throughput (Mbps)

50

109.10

21.72

7.22

15

64QAM

948

772

4167.19

100

120.68

10.13

3.50

11

64QAM

567

567

3127.90

150

127.53

3.28

1.64

7

16QAM

378

378

1329.18

200

132.40

-1.58

0.76

4

QPSK

308

308

522.09


In v12.2


FR1 - Variation of path loss, SNR, Efficiency, CQI, Modulation, code rates, and throughput as the distance of the UE from the gNB is increased:


Distance(m)

Pathloss (dB)

SNR (dB)

Downlink Efficiency (dB)

CQI Index

Modulation

Code Rate R*[1024] (CQI)

Code Rate R*[1024] 

(MCS)

Throughput (Mbps)

100

97.34

40.47

13.44

15

64QAM

948

772

506.39

200

109.05

28.75

9.55

15

64QAM

948

772

506.39

300

115.93

21.88

7.28

15

64QAM

948

772

506.39

400

120.80

17.00 

5.68

15

64QAM

948

772

506.39

500

124.59

13.21

4.46

13

64QAM

772

772

505.37

600

127.68

10.12

3.50

12

64QAM

666

666

380.01

700

130.30

7.50

2.73

10

64QAM

466

466

239.04

800

132.56

5.24

2.12

9

16QAM

616

616

188.59

900

 134.56

3.24

1.64

8

16QAM

490

490

135.04

1000

136.35

1.45

1.26

7

16QAM

378

378

122.21

FR 2 - Variation of path loss, SNR, Efficiency, CQI, Modulation, code rates, and throughput as the distance of the UE from the gNB is increased:


Distance(m)

Pathloss (dB)

SNR (dB)

Downlink Efficiency (dB)

CQI Index

Modulation

Code Rate R*[1024]

(CQI)

Code Rate R*[1024] 

(MCS)

Throughput (Mbps)

50

109.10

24.73

8.22

15

64QAM

948

772

4192.18

100

120.68

13.15

4.44

13

64QAM

772

772

4192.18

150

127.53

6.30

2.40

9

16QAM

616

616

2278.53

200

132.40

1.43

1.26

7

16QAM

378

378

1352.78


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