Applicable VersionsNetSim StandardNetSim Pro


Applicable Releasesv13.1


Goal

  • 5G E2E Real World Simulation. 
  • System Level simulation including the PHY simulation

Scenario

  • gNB x 1 (Antenna 4x4) 
  • UE x 5 (Antenna 2x2 in different locations) 
  • TDD 
  • FR1 c-band (n79)
  • 3GPP channel model with Line-of-sight propagation 
  • Throughput Test per UE and log SINR, BLER, and RSSI

Network Setup

1-gNB connected to 4UEs at different distances. UEs are downloading data from a remote server over the cloud and then via the 5G core.



Simulation parameters  

 

Parameter

Value

gNB transmit power

40 dBm

gNB bandwidth

100 MHz

gNB Tx/Rx

4 x 4

DL:UL Ratio

4:1

UE Transmit power 

23 dBm

UE Tx/Rx

2 x 2

UE Mobility

No mobility

UE distances from gNB

5 UEs are at

300m, 600m, 900m, 1200m, 1500m

MAC Scheduler

Round Robin

Beamforming

Disabled

Channel model

3G PP UMa

LOS probability

1

Traffic model

Full buffer in UL & DL


Throughput results and radio measurements

We run the simulation and measure throughput. Various radio measurements are logged.

 

 

 UE1 (300m)

 UE2 (600m)

 UE3 (900m)

 UE4 (1200m)

 UE5 (1500m)

 

UL

DL

UL

DL

UL

DL

UL

DL

UL

DL

RSS (dBm)

-76.43

-59.43

-88.47

-71.47

-95.51

-78.51

-100.51

-83.51

-104.38

-87.38

SINR (dBm)

17.39

34.39

5.35

22.35

-1.68

15.31

-6.68

10.31

-10.56

6.43

MCS Index

28

28

18

28

10

28

6

24

0

20

Throughput (Mbps)

34.19

102.45

14.76

102.64

4.22

102.55

1.54

76.90

0

53.61

Modulation

64 QAM

 64 QAM

16 QAM

 64 QAM

QPSK

 64 QAM

QPSK

64 QAM

 NULL

16 QAM

Code Rate

772

772

490

772

308

772

120

567

NULL

616

gNB transmit power is 40 dBm while UE transmit power is 23 dBm, DL:UL ratio is 4:1.


We observe that

  • DL max MCS is seen at 900m itself, hence 600m, and 300m UEs also see the same DL throughput
  • At 1500m UE sees NIL UL throughput since the SINR is below the cutoff

Single UE at 300m and then at 1500m

next, we perform a capacity analysis to arrive at the network saturation rates for each UE for obtaining the results in the previous table.

 

300m

DL

UL

RSS (dBm)

-59.43

-76.43

SINR (I = 0) (dB)

34.39

17.39

MCS Index

28

28

Throughput (Mbps)

506.74

133.73


 

1500m

DL

UL

RSS (dBm)

-87.39

-104.38

SINR (I = 0) (dB)

6.43

-10.56

MCS Index

20

0

Throughput (Mbps)

267.89

0

  • SINR Cut off for outage is ~ -9.5 dB hence NIL UL throughput at 1500 m