Can I simulate low-band 1800 MHz (n3) and mid-band 3.5 GHz (n78) carrier aggregation? UL and DL. Basically, get some numbers on how the low-band (FDD) carrier gives better performance at the mid-band (TDD) cell edge and indoors. I am aware of NetSim but any other simulator is also OK
Here is one way to think about it.
Create a base scenario in NetSim, for example 1 central Base station plus 6 adjacent BSs (one tier interference). Enable carrier aggregation with n3 and n78 in the gNBs. Enable radio measurements - to check SINR and MCS for each band, and also enable measurements for DL and UL throughput.
With this set up, you can vary different parameters and check the output measurements in the DL and in the UL (SINR, MCS, Throughput etc)
1. The inter site distance, i.e., the distances between the gNBs
2. Different radio propagation models
3. SISO vs. MIMO
... and so on
You can buildings in NetSim to simulate the indoor performance
Also, this is a useful discussion to look at https://www.researchgate.net/post/How_do_I_compare_5G_low-band_C-band_and_mm-Wave_coverage_for_DL_and_UL
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