This is usually considered as an acceptable trade-off between simulation complexity
and accuracy.
To better understand the simulation results below, we note the following two limitations of the LENA model: Hybrid Automatic Repeat Request (H-ARQ) is not
implemented and the Acknowledged Mode (AM) implementation is partial, hence Unacknowledged Mode (UM) was used.
This means that recovery of any RLC PDU which cannot be decoded by the receiver never occurs, which is highly pessimistic with respect to typical LTE deployments.
However, we argue that such limitations do not have a significant impact on the qualitative conclusions which can be drawn from the results.