Table 27 Typical Ccu Transmit Statistics - WaveRider LMS4000 User Manual

Table 27 Typical CCU Transmit Statistics

A
B
C
D
E
F
G
H
I
The objective of the first level analysis of this data is to determine the relative amount of radio
traffic resulting from retransmissions. Ideally, the percentage would be 0. In practice, local
engineering limitations result in a certain normal level. Once this normal level is established,
the statistics can be used to monitor changes.
Since not all of these CCU transmit statistics are independent, you have to be careful when
interpreting and using results which are based on these statistics. For example, since
broadcast payloads are not acknowledged, the retry data is not relevant to these payloads,
and they have to be netted out of the total. In addition, the txPayloadsFailAssocDeleted
payloads are not actually transmitted. So they also have to be netted out of the total. The
calculations to do this are shown below:
Using this data, the following calculations can be made:
Total number of desired payloads = A + B = 68,691
Net Payloads sent via EUM polls (see note) =
This same result can be calculated as follows:
Net Payloads sent via EUM polls (see note) = D + E + F + G + H = 68,236
NOTE: Due to real-time issues (at any given time, some packets are
The percentage of payloads that are delivered on the first transmission
= 66,001 / 68,235 = 97%
APCD-LM043-4.0
Statistic
tx Data Payloads
tx Ctrl Payloads
txPayloadsBCast
txPayloads1Ok
txPayloads2Ok
txPayloads3Ok
txPayloads4Ok
txPayloadsFailRetry
txPayloadsFailAssocDeleted
A + B - C - I = 67,790 + 901 - 445 - 11 = 68,235
being processed or queued), the numbers often differ by the
small number of packets that are in queues.
11 Monitoring the Network
Sample
67,790
901
445
66,001
1,761
281
91
102
11
129