The range from which the random integer number is chosen to multiply the slot length
in order to get the access time period. This value is used when the previous channel
event was a data frame reception (by the same radio). Note that ACK is not considered
a data frame.
Slots after TX [No]
Default = 6 [0=Min, 12=Max]
The range from which the random integer number is chosen to multiply the slot length
in order to get the access time period. This value is used when the previous channel
event was a data frame transmission from the same radio. Note that ACK is not con-
sidered a data frame.
Slots handicap [No]
Default = 0 [0=Min, 7=Max]
A fixed number which is always added to the random number of slots generated from
the respective range (see above). The higher slot handicap a radio has, the lower
chance to win the channel access competition it may stand.
NOTE: The maximum number of slots used to calculate the channel access period is
14. When the sum of the slot handicap and the generated random number exceeds
14, it is cut to that figure.
Collision prevention
This menu allows for setting up a prevention mechanism against application-driven colli-
sions. Perfectly synchronized simultaneous transmission requests arriving to different
radios in long enough intervals may always come in free channel conditions and con-
sequently the zero access time period is applied, resulting in a "guaranteed" collision.
NOTE: These are not the "common" collisions taking place when RF channel is heavily
loaded.
Probability [%]
Default = 0 [0=0ff, 100=Max]
When a transmission request arrives in free channel conditions, a delay period defined
below is applied with the probability set.
Delay length [bytes]
Default = 10 [1=Min, 16000=Max]
This item is visible only when the "Probability" value (see above) is non-zero. The
actual delay time period is calculated the same way as for e.g. the "Fix timeout [bytes]"
item defined above. It is applied as the channel access period only when the RF
channel is free (hence the normal channel access period would be zero). When the
RF channel is busy, standard mechanism of random slotted access is used.
TX Buffer
Others
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© RACOM s.r.o. – RipEX Radio modem & Router
Advanced Configuration
Summary of Contents for RipEX
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