The way the packet error is decided is
- Compute Rx power at the receiver based on Tx Power, less losses due to Propagation. Propagation models cover HATA Urban, Sub Urban, COST 231 HATA, Indoor Home / Office, Factory, Lognormal, Friis Free space. Apart from pathloss, fading and shadowing can also be modeled
- Rx Power / (Background Noise + Interference noise) = SINR. Here Interference noise is due to other transmissions within the network
- Based on the SINR, BER is got from respective modulation curve/table.
- Based on the BER, the packet error rate is decided
NetSim does not perform bit-wise simulation since it would be too computationally intensive.