alu,
good analysis.
the denominator is doubtful too, in my opinion 🙂
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GPRS_DL_useful_throughput_radio_GPRS_TBF_avg = GPRS_DL_useful_bits_CSx_ack / (GPRS_DL_active_connection_GPRS_ack_time*1000)
GPRS_DL_active_connection_GPRS_ack_time = Cumulated time duration of all active DL TBFs established in GPRS mode and RLC acknowledged mode
Note: An active DL TBF connection is a DL TBF not in delayed release state.
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Are all your TBF in RLC ACK mode ? As far as I can see, that would be the only possible explanation.
Have you checked the mono object distribution reports I was talking about ?
Basically, you could also check these (as new, but simpler) indicators:
GPRS_DL_LLC_throughput_per_GPRS_ack_TBF
GPRS_DL_LLC_throughput_per_GPRS_unack_TBF
They should provide better stats.
let me know…
regards
pix