EGPRS: No recalculation of window size in gprs_rlcmac_tbf::update
When DL data is triggered without MS/tbf context at PCU, It allocates single TS with X(In our case it is 64)Window size. When PCU recalculates the Number of DL Time Slots to 4. It keeps old calculated Window size X(in our case 64) itself. Causing the poor DL throughput.