ENB Performance Report

The eNB performance report generates a report of eNB performance in each layer and notes anything unusual in the results.
The performance report is based on the same KPI-related measurements that are reported to any remote monitoring system (Zabbix, for example).

Getting the Report

To generate a report:

enb measurements report

The report is based on performance since the measurements were last cleared. This period of time is shown in the report as the baseline, in seconds. To clear measurements and start a new baseline:

enb measurements clear

Note: This will also clear measurements reported to the remote monitoring system.

Reading the Report

The report shows, for each layer in UL and DL:

  • the number of kBytes that have passed through that layer ("in" on DL, "out" on UL)
  • the average data rate in kbits/sec through that layer
  • BW utilization, as a fraction of total available BW in the PHY
  • ACK/NACK and retransmission rates (RLC, HARQ)
  • transmission delay estimates (DL PDCP, MAC)
  • protocol overhead (RLC, MAC, PHY)
  • other statistics particular to each layer:
  • packet loss (PDCP)
  • transport blocks dropped due to late processing (MAC)
  • mean transport block size and mean buffer status report (MAC)
  • spectral efficiency in bits/element (PHY)
  • total available traffic BW, excluding overhead, in kbits/sec (PHY).

The report also shows random access request (RAR) processing performance:

  • number of PRACH received
  • number of "msg3" responses from the UE completing the RAR procedure
  • RAR success rate.

The report will also include “NOTE” comments drawing attention to possible performance problems.

Example Report

(Because the baseline of this report is 8 seconds, the kBytes and kBit/sec figures match numerically.)

enb measurements report
Rates are in kbits/sec
In/out counts are in kBytes.
DL Performance Report:
baseline=8 seconds
PDCP:  in=3640 rate=3639.94 
util=0.381482 loss=0.183966
delay=329ms RLC: in=3169 rate=3168.69
util=0.332093
rtx/total=0.168558
nacks/pdus=0.16266 nacks/
(nacks+acks)=delay=
4.53058msHARQ: out=248
rate=248.248 util=0.0568985
rtx=0.197696 fer=0.08
PHY: out=309 rate=309.419
util=0.0709189 avail=4363
eff=1.3036 snr=28
rbOverhead=0.184
NOTE: RLC RTX rate
0.242911 is 3.99453x
RLC NACK rate 0.0608108
NOTE: HARQ RTX rate
0.197696 is 2.4712x UL FER 0.08
NOTE: MAC out/in ratio
1.5154
RAR Performance Report:
baseline=8 seconds
RAR: rachEvents=0
msg3Events=0 rate=-nan